--- /dev/null
+Applied Micro X-Gene SoC DMA nodes
+
+DMA nodes are defined to describe on-chip DMA interfaces in
+APM X-Gene SoC.
+
+Required properties for DMA interfaces:
+- compatible: Should be "apm,xgene-dma".
+- device_type: set to "dma".
+- reg: Address and length of the register set for the device.
+ It contains the information of registers in the following order:
+ 1st - DMA control and status register address space.
+ 2nd - Descriptor ring control and status register address space.
+ 3rd - Descriptor ring command register address space.
+ 4th - Soc efuse register address space.
+- interrupts: DMA has 5 interrupts sources. 1st interrupt is
+ DMA error reporting interrupt. 2nd, 3rd, 4th and 5th interrupts
+ are completion interrupts for each DMA channels.
+- clocks: Reference to the clock entry.
+
+Optional properties:
+- dma-coherent : Present if dma operations are coherent
+
+Example:
+ dmaclk: dmaclk@1f27c000 {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <&socplldiv2 0>;
+ reg = <0x0 0x1f27c000 0x0 0x1000>;
+ reg-names = "csr-reg";
+ clock-output-names = "dmaclk";
+ };
+
+ dma: dma@1f270000 {
+ compatible = "apm,xgene-storm-dma";
+ device_type = "dma";
+ reg = <0x0 0x1f270000 0x0 0x10000>,
+ <0x0 0x1f200000 0x0 0x10000>,
+ <0x0 0x1b008000 0x0 0x2000>,
+ <0x0 0x1054a000 0x0 0x100>;
+ interrupts = <0x0 0x82 0x4>,
+ <0x0 0xb8 0x4>,
+ <0x0 0xb9 0x4>,
+ <0x0 0xba 0x4>,
+ <0x0 0xbb 0x4>;
+ dma-coherent;
+ clocks = <&dmaclk 0>;
+ };
--- /dev/null
+* Ingenic JZ4780 DMA Controller
+
+Required properties:
+
+- compatible: Should be "ingenic,jz4780-dma"
+- reg: Should contain the DMA controller registers location and length.
+- interrupts: Should contain the interrupt specifier of the DMA controller.
+- interrupt-parent: Should be the phandle of the interrupt controller that
+- clocks: Should contain a clock specifier for the JZ4780 PDMA clock.
+- #dma-cells: Must be <2>. Number of integer cells in the dmas property of
+ DMA clients (see below).
+
+Optional properties:
+
+- ingenic,reserved-channels: Bitmask of channels to reserve for devices that
+ need a specific channel. These channels will only be assigned when explicitly
+ requested by a client. The primary use for this is channels 0 and 1, which
+ can be configured to have special behaviour for NAND/BCH when using
+ programmable firmware.
+
+Example:
+
+dma: dma@13420000 {
+ compatible = "ingenic,jz4780-dma";
+ reg = <0x13420000 0x10000>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <10>;
+
+ clocks = <&cgu JZ4780_CLK_PDMA>;
+
+ #dma-cells = <2>;
+
+ ingenic,reserved-channels = <0x3>;
+};
+
+DMA clients must use the format described in dma.txt, giving a phandle to the
+DMA controller plus the following 2 integer cells:
+
+1. Request type: The DMA request type for transfers to/from the device on
+ the allocated channel, as defined in the SoC documentation.
+
+2. Channel: If set to 0xffffffff, any available channel will be allocated for
+ the client. Otherwise, the exact channel specified will be used. The channel
+ should be reserved on the DMA controller using the ingenic,reserved-channels
+ property.
+
+Example:
+
+uart0: serial@10030000 {
+ ...
+ dmas = <&dma 0x14 0xffffffff
+ &dma 0x15 0xffffffff>;
+ dma-names = "tx", "rx";
+ ...
+};
- compatible: must be one of the following:
* "qcom,bam-v1.4.0" for MSM8974, APQ8074 and APQ8084
* "qcom,bam-v1.3.0" for APQ8064, IPQ8064 and MSM8960
+ * "qcom,bam-v1.7.0" for MSM8916
- reg: Address range for DMA registers
- interrupts: Should contain the one interrupt shared by all channels
- #dma-cells: must be <1>, the cell in the dmas property of the client device
+++ /dev/null
-* R-Car Audio DMAC peri peri Device Tree bindings
-
-Required properties:
-- compatible: should be "renesas,rcar-audmapp"
-- #dma-cells: should be <1>, see "dmas" property below
-
-Example:
- audmapp: audio-dma-pp@0xec740000 {
- compatible = "renesas,rcar-audmapp";
- #dma-cells = <1>;
-
- reg = <0 0xec740000 0 0x200>;
- };
-
-
-* DMA client
-
-Required properties:
-- dmas: a list of <[DMA multiplexer phandle] [SRS << 8 | DRS]> pairs.
- where SRS/DRS are specified in the SoC manual.
- It will be written into PDMACHCR as high 16-bit parts.
-- dma-names: a list of DMA channel names, one per "dmas" entry
-
-Example:
-
- dmas = <&audmapp 0x2d00
- &audmapp 0x3700>;
- dma-names = "src0_ssiu0",
- "dvc0_ssiu0";
--- /dev/null
+* Renesas USB DMA Controller Device Tree bindings
+
+Required Properties:
+- compatible: must contain "renesas,usb-dmac"
+- reg: base address and length of the registers block for the DMAC
+- interrupts: interrupt specifiers for the DMAC, one for each entry in
+ interrupt-names.
+- interrupt-names: one entry per channel, named "ch%u", where %u is the
+ channel number ranging from zero to the number of channels minus one.
+- clocks: a list of phandle + clock-specifier pairs.
+- #dma-cells: must be <1>, the cell specifies the channel number of the DMAC
+ port connected to the DMA client.
+- dma-channels: number of DMA channels
+
+Example: R8A7790 (R-Car H2) USB-DMACs
+
+ usb_dmac0: dma-controller@e65a0000 {
+ compatible = "renesas,usb-dmac";
+ reg = <0 0xe65a0000 0 0x100>;
+ interrupts = <0 109 IRQ_TYPE_LEVEL_HIGH
+ 0 109 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "ch0", "ch1";
+ clocks = <&mstp3_clks R8A7790_CLK_USBDMAC0>;
+ #dma-cells = <1>;
+ dma-channels = <2>;
+ };
+
+ usb_dmac1: dma-controller@e65b0000 {
+ compatible = "renesas,usb-dmac";
+ reg = <0 0xe65b0000 0 0x100>;
+ interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH
+ 0 110 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "ch0", "ch1";
+ clocks = <&mstp3_clks R8A7790_CLK_USBDMAC1>;
+ #dma-cells = <1>;
+ dma-channels = <2>;
+ };
S: Maintained
F: drivers/ipack/
+INGENIC JZ4780 DMA Driver
+M: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+S: Maintained
+F: drivers/dma/dma-jz4780.c
+
INTEGRITY MEASUREMENT ARCHITECTURE (IMA)
M: Mimi Zohar <zohar@linux.vnet.ibm.com>
M: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
};
/* SDHI0 */
-static struct sh_mobile_sdhi_info sdhi0_info = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI0_RX,
- .tmio_caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
+static struct tmio_mmc_data sdhi0_info = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI0_RX,
+ .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
MMC_CAP_POWER_OFF_CARD,
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_USE_GPIO_CD,
+ .flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_USE_GPIO_CD,
.cd_gpio = 167,
};
};
/* SDHI1 */
-static struct sh_mobile_sdhi_info sdhi1_info = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI1_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI1_RX,
- .tmio_caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
+static struct tmio_mmc_data sdhi1_info = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI1_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI1_RX,
+ .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
MMC_CAP_POWER_OFF_CARD,
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_USE_GPIO_CD,
+ .flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_USE_GPIO_CD,
/* Port72 cannot generate IRQs, will be used in polling mode. */
.cd_gpio = 72,
};
/* SDHI */
-static struct sh_mobile_sdhi_info sdhi0_info __initdata = {
- .dma_slave_tx = HPBDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = HPBDMA_SLAVE_SDHI0_RX,
- .tmio_caps = MMC_CAP_SD_HIGHSPEED,
- .tmio_ocr_mask = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34,
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
+static struct tmio_mmc_data sdhi0_info __initdata = {
+ .chan_priv_tx = (void *)HPBDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)HPBDMA_SLAVE_SDHI0_RX,
+ .capabilities = MMC_CAP_SD_HIGHSPEED,
+ .ocr_mask = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34,
+ .flags = TMIO_MMC_HAS_IDLE_WAIT,
};
static struct resource sdhi0_resources[] __initdata = {
platform_device_register_resndata(
NULL, "sh_mobile_sdhi", 0,
sdhi0_resources, ARRAY_SIZE(sdhi0_resources),
- &sdhi0_info, sizeof(struct sh_mobile_sdhi_info));
+ &sdhi0_info, sizeof(struct tmio_mmc_data));
}
/* for Audio */
};
/* SDHI */
-static struct sh_mobile_sdhi_info sdhi0_info = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI0_RX,
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
- .tmio_caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
+static struct tmio_mmc_data sdhi0_info = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI0_RX,
+ .flags = TMIO_MMC_HAS_IDLE_WAIT,
+ .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
MMC_CAP_POWER_OFF_CARD,
};
};
/* Micro SD */
-static struct sh_mobile_sdhi_info sdhi2_info = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI2_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI2_RX,
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT |
+static struct tmio_mmc_data sdhi2_info = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI2_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI2_RX,
+ .flags = TMIO_MMC_HAS_IDLE_WAIT |
TMIO_MMC_USE_GPIO_CD |
TMIO_MMC_WRPROTECT_DISABLE,
- .tmio_caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_POWER_OFF_CARD,
+ .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_POWER_OFF_CARD,
.cd_gpio = 13,
};
},
};
-static struct sh_mobile_sdhi_info sdhi0_platform_data = {
- .dma_slave_tx = HPBDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = HPBDMA_SLAVE_SDHI0_RX,
- .tmio_flags = TMIO_MMC_WRPROTECT_DISABLE | TMIO_MMC_HAS_IDLE_WAIT,
- .tmio_caps = MMC_CAP_SD_HIGHSPEED,
+static struct tmio_mmc_data sdhi0_platform_data = {
+ .chan_priv_tx = (void *)HPBDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)HPBDMA_SLAVE_SDHI0_RX,
+ .flags = TMIO_MMC_WRPROTECT_DISABLE | TMIO_MMC_HAS_IDLE_WAIT,
+ .capabilities = MMC_CAP_SD_HIGHSPEED,
};
static struct platform_device sdhi0_device = {
#address-cells = <2>;
#size-cells = <2>;
ranges;
+ dma-ranges = <0x0 0x0 0x0 0x0 0x400 0x0>;
clocks {
#address-cells = <2>;
reg-names = "csr-reg";
clock-output-names = "pcie4clk";
};
+
+ dmaclk: dmaclk@1f27c000 {
+ compatible = "apm,xgene-device-clock";
+ #clock-cells = <1>;
+ clocks = <&socplldiv2 0>;
+ reg = <0x0 0x1f27c000 0x0 0x1000>;
+ reg-names = "csr-reg";
+ clock-output-names = "dmaclk";
+ };
};
pcie0: pcie@1f2b0000 {
interrupts = <0x0 0x41 0x4>;
clocks = <&rngpkaclk 0>;
};
+
+ dma: dma@1f270000 {
+ compatible = "apm,xgene-storm-dma";
+ device_type = "dma";
+ reg = <0x0 0x1f270000 0x0 0x10000>,
+ <0x0 0x1f200000 0x0 0x10000>,
+ <0x0 0x1b008000 0x0 0x2000>,
+ <0x0 0x1054a000 0x0 0x100>;
+ interrupts = <0x0 0x82 0x4>,
+ <0x0 0xb8 0x4>,
+ <0x0 0xb9 0x4>,
+ <0x0 0xba 0x4>,
+ <0x0 0xbb 0x4>;
+ dma-coherent;
+ clocks = <&dmaclk 0>;
+ };
};
};
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/io.h>
+#include <linux/mfd/tmio.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sh_mmcif.h>
#include <linux/mmc/sh_mobile_sdhi.h>
};
/* SDHI0 */
-static struct sh_mobile_sdhi_info sdhi_info = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI_RX,
- .tmio_caps = MMC_CAP_SD_HIGHSPEED,
+static struct tmio_mmc_data sdhi_info = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI_RX,
+ .capabilities = MMC_CAP_SD_HIGHSPEED,
};
static struct resource sdhi_resources[] = {
#include <linux/mmc/sh_mobile_sdhi.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/sh_flctl.h>
+#include <linux/mfd/tmio.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/regulator/fixed.h>
},
};
-static struct sh_mobile_sdhi_info sdhi0_cn3_data = {
- .tmio_caps = MMC_CAP_SDIO_IRQ,
+static struct tmio_mmc_data sdhi0_cn3_data = {
+ .capabilities = MMC_CAP_SDIO_IRQ,
};
static struct platform_device sdhi0_cn3_device = {
},
};
-static struct sh_mobile_sdhi_info sdhi1_cn7_data = {
- .tmio_caps = MMC_CAP_SDIO_IRQ,
+static struct tmio_mmc_data sdhi1_cn7_data = {
+ .capabilities = MMC_CAP_SDIO_IRQ,
};
static struct platform_device sdhi1_cn7_device = {
},
};
-static struct sh_mobile_sdhi_info sdhi0_info = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI0_RX,
- .tmio_caps = MMC_CAP_SDIO_IRQ | MMC_CAP_POWER_OFF_CARD |
+static struct tmio_mmc_data sdhi0_info = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI0_RX,
+ .capabilities = MMC_CAP_SDIO_IRQ | MMC_CAP_POWER_OFF_CARD |
MMC_CAP_NEEDS_POLL,
- .tmio_flags = TMIO_MMC_USE_GPIO_CD,
+ .flags = TMIO_MMC_USE_GPIO_CD,
.cd_gpio = GPIO_PTY7,
};
#if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE)
/* SDHI1 */
-static struct sh_mobile_sdhi_info sdhi1_info = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI1_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI1_RX,
- .tmio_caps = MMC_CAP_SDIO_IRQ | MMC_CAP_POWER_OFF_CARD |
+static struct tmio_mmc_data sdhi1_info = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI1_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI1_RX,
+ .capabilities = MMC_CAP_SDIO_IRQ | MMC_CAP_POWER_OFF_CARD |
MMC_CAP_NEEDS_POLL,
- .tmio_flags = TMIO_MMC_USE_GPIO_CD,
+ .flags = TMIO_MMC_USE_GPIO_CD,
.cd_gpio = GPIO_PTW7,
};
},
};
-static struct sh_mobile_sdhi_info sh7724_sdhi0_data = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI0_RX,
- .tmio_flags = TMIO_MMC_WRPROTECT_DISABLE,
- .tmio_caps = MMC_CAP_SDIO_IRQ,
+static struct tmio_mmc_data sh7724_sdhi0_data = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI0_RX,
+ .flags = TMIO_MMC_WRPROTECT_DISABLE,
+ .capabilities = MMC_CAP_SDIO_IRQ,
};
static struct platform_device kfr2r09_sh_sdhi0_device = {
#include <linux/mmc/host.h>
#include <linux/mmc/sh_mobile_sdhi.h>
#include <linux/mtd/physmap.h>
+#include <linux/mfd/tmio.h>
#include <linux/mtd/nand.h>
#include <linux/i2c.h>
#include <linux/regulator/fixed.h>
},
};
-static struct sh_mobile_sdhi_info sh7724_sdhi_data = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI0_RX,
- .tmio_caps = MMC_CAP_SDIO_IRQ,
+static struct tmio_mmc_data sh7724_sdhi_data = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI0_RX,
+ .capabilities = MMC_CAP_SDIO_IRQ,
};
static struct platform_device sdhi_cn9_device = {
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sh_mobile_sdhi.h>
+#include <linux/mfd/tmio.h>
#include <linux/mtd/physmap.h>
#include <linux/delay.h>
#include <linux/regulator/fixed.h>
},
};
-static struct sh_mobile_sdhi_info sh7724_sdhi0_data = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI0_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI0_RX,
- .tmio_caps = MMC_CAP_SDIO_IRQ,
+static struct tmio_mmc_data sh7724_sdhi0_data = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI0_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI0_RX,
+ .capabilities = MMC_CAP_SDIO_IRQ,
};
static struct platform_device sdhi0_cn7_device = {
},
};
-static struct sh_mobile_sdhi_info sh7724_sdhi1_data = {
- .dma_slave_tx = SHDMA_SLAVE_SDHI1_TX,
- .dma_slave_rx = SHDMA_SLAVE_SDHI1_RX,
- .tmio_caps = MMC_CAP_SDIO_IRQ,
+static struct tmio_mmc_data sh7724_sdhi1_data = {
+ .chan_priv_tx = (void *)SHDMA_SLAVE_SDHI1_TX,
+ .chan_priv_rx = (void *)SHDMA_SLAVE_SDHI1_RX,
+ .capabilities = MMC_CAP_SDIO_IRQ,
};
static struct platform_device sdhi1_cn8_device = {
EloPlus is on mpc85xx and mpc86xx and Pxxx parts, and the Elo3 is on
some Txxx and Bxxx parts.
+config FSL_RAID
+ tristate "Freescale RAID engine Support"
+ depends on FSL_SOC && !ASYNC_TX_ENABLE_CHANNEL_SWITCH
+ select DMA_ENGINE
+ select DMA_ENGINE_RAID
+ ---help---
+ Enable support for Freescale RAID Engine. RAID Engine is
+ available on some QorIQ SoCs (like P5020/P5040). It has
+ the capability to offload memcpy, xor and pq computation
+ for raid5/6.
+
source "drivers/dma/hsu/Kconfig"
config MPC512X_DMA
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
+config DMA_JZ4780
+ tristate "JZ4780 DMA support"
+ depends on MACH_JZ4780
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ help
+ This selects support for the DMA controller in Ingenic JZ4780 SoCs.
+ If you have a board based on such a SoC and wish to use DMA for
+ devices which can use the DMA controller, say Y or M here.
+
config K3_DMA
tristate "Hisilicon K3 DMA support"
depends on ARCH_HI3xxx
help
Enable support for the IMG multi-threaded DMA controller (MDC).
+config XGENE_DMA
+ tristate "APM X-Gene DMA support"
+ select DMA_ENGINE
+ select DMA_ENGINE_RAID
+ select ASYNC_TX_ENABLE_CHANNEL_SWITCH
+ help
+ Enable support for the APM X-Gene SoC DMA engine.
+
config DMA_ENGINE
bool
obj-$(CONFIG_DMA_BCM2835) += bcm2835-dma.o
obj-$(CONFIG_MMP_PDMA) += mmp_pdma.o
obj-$(CONFIG_DMA_JZ4740) += dma-jz4740.o
+obj-$(CONFIG_DMA_JZ4780) += dma-jz4780.o
obj-$(CONFIG_TI_CPPI41) += cppi41.o
obj-$(CONFIG_K3_DMA) += k3dma.o
obj-$(CONFIG_MOXART_DMA) += moxart-dma.o
+obj-$(CONFIG_FSL_RAID) += fsl_raid.o
obj-$(CONFIG_FSL_EDMA) += fsl-edma.o
obj-$(CONFIG_QCOM_BAM_DMA) += qcom_bam_dma.o
obj-y += xilinx/
obj-$(CONFIG_NBPFAXI_DMA) += nbpfaxi.o
obj-$(CONFIG_DMA_SUN6I) += sun6i-dma.o
obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o
+obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is in this distribution in the file
* called COPYING.
*
/*
* The DMA ENGINE API
*/
-static int pl08x_alloc_chan_resources(struct dma_chan *chan)
-{
- return 0;
-}
-
static void pl08x_free_chan_resources(struct dma_chan *chan)
{
/* Ensure all queued descriptors are freed */
/* Initialize memcpy engine */
dma_cap_set(DMA_MEMCPY, pl08x->memcpy.cap_mask);
pl08x->memcpy.dev = &adev->dev;
- pl08x->memcpy.device_alloc_chan_resources = pl08x_alloc_chan_resources;
pl08x->memcpy.device_free_chan_resources = pl08x_free_chan_resources;
pl08x->memcpy.device_prep_dma_memcpy = pl08x_prep_dma_memcpy;
pl08x->memcpy.device_prep_dma_interrupt = pl08x_prep_dma_interrupt;
dma_cap_set(DMA_SLAVE, pl08x->slave.cap_mask);
dma_cap_set(DMA_CYCLIC, pl08x->slave.cap_mask);
pl08x->slave.dev = &adev->dev;
- pl08x->slave.device_alloc_chan_resources = pl08x_alloc_chan_resources;
pl08x->slave.device_free_chan_resources = pl08x_free_chan_resources;
pl08x->slave.device_prep_dma_interrupt = pl08x_prep_dma_interrupt;
pl08x->slave.device_tx_status = pl08x_dma_tx_status;
/*----------------------------------------------------------------------*/
+static inline unsigned int atc_get_xfer_width(dma_addr_t src, dma_addr_t dst,
+ size_t len)
+{
+ unsigned int width;
+
+ if (!((src | dst | len) & 3))
+ width = 2;
+ else if (!((src | dst | len) & 1))
+ width = 1;
+ else
+ width = 0;
+
+ return width;
+}
+
static struct at_desc *atc_first_active(struct at_dma_chan *atchan)
{
return list_first_entry(&atchan->active_list,
* We can be a lot more clever here, but this should take care
* of the most common optimization.
*/
- if (!((src | dest | len) & 3)) {
- ctrla = ATC_SRC_WIDTH_WORD | ATC_DST_WIDTH_WORD;
- src_width = dst_width = 2;
- } else if (!((src | dest | len) & 1)) {
- ctrla = ATC_SRC_WIDTH_HALFWORD | ATC_DST_WIDTH_HALFWORD;
- src_width = dst_width = 1;
- } else {
- ctrla = ATC_SRC_WIDTH_BYTE | ATC_DST_WIDTH_BYTE;
- src_width = dst_width = 0;
- }
+ src_width = dst_width = atc_get_xfer_width(src, dest, len);
+
+ ctrla = ATC_SRC_WIDTH(src_width) |
+ ATC_DST_WIDTH(dst_width);
for (offset = 0; offset < len; offset += xfer_count << src_width) {
xfer_count = min_t(size_t, (len - offset) >> src_width,
return NULL;
}
+/**
+ * atc_prep_dma_sg - prepare memory to memory scather-gather operation
+ * @chan: the channel to prepare operation on
+ * @dst_sg: destination scatterlist
+ * @dst_nents: number of destination scatterlist entries
+ * @src_sg: source scatterlist
+ * @src_nents: number of source scatterlist entries
+ * @flags: tx descriptor status flags
+ */
+static struct dma_async_tx_descriptor *
+atc_prep_dma_sg(struct dma_chan *chan,
+ struct scatterlist *dst_sg, unsigned int dst_nents,
+ struct scatterlist *src_sg, unsigned int src_nents,
+ unsigned long flags)
+{
+ struct at_dma_chan *atchan = to_at_dma_chan(chan);
+ struct at_desc *desc = NULL;
+ struct at_desc *first = NULL;
+ struct at_desc *prev = NULL;
+ unsigned int src_width;
+ unsigned int dst_width;
+ size_t xfer_count;
+ u32 ctrla;
+ u32 ctrlb;
+ size_t dst_len = 0, src_len = 0;
+ dma_addr_t dst = 0, src = 0;
+ size_t len = 0, total_len = 0;
+
+ if (unlikely(dst_nents == 0 || src_nents == 0))
+ return NULL;
+
+ if (unlikely(dst_sg == NULL || src_sg == NULL))
+ return NULL;
+
+ ctrlb = ATC_DEFAULT_CTRLB | ATC_IEN
+ | ATC_SRC_ADDR_MODE_INCR
+ | ATC_DST_ADDR_MODE_INCR
+ | ATC_FC_MEM2MEM;
+
+ /*
+ * loop until there is either no more source or no more destination
+ * scatterlist entry
+ */
+ while (true) {
+
+ /* prepare the next transfer */
+ if (dst_len == 0) {
+
+ /* no more destination scatterlist entries */
+ if (!dst_sg || !dst_nents)
+ break;
+
+ dst = sg_dma_address(dst_sg);
+ dst_len = sg_dma_len(dst_sg);
+
+ dst_sg = sg_next(dst_sg);
+ dst_nents--;
+ }
+
+ if (src_len == 0) {
+
+ /* no more source scatterlist entries */
+ if (!src_sg || !src_nents)
+ break;
+
+ src = sg_dma_address(src_sg);
+ src_len = sg_dma_len(src_sg);
+
+ src_sg = sg_next(src_sg);
+ src_nents--;
+ }
+
+ len = min_t(size_t, src_len, dst_len);
+ if (len == 0)
+ continue;
+
+ /* take care for the alignment */
+ src_width = dst_width = atc_get_xfer_width(src, dst, len);
+
+ ctrla = ATC_SRC_WIDTH(src_width) |
+ ATC_DST_WIDTH(dst_width);
+
+ /*
+ * The number of transfers to set up refer to the source width
+ * that depends on the alignment.
+ */
+ xfer_count = len >> src_width;
+ if (xfer_count > ATC_BTSIZE_MAX) {
+ xfer_count = ATC_BTSIZE_MAX;
+ len = ATC_BTSIZE_MAX << src_width;
+ }
+
+ /* create the transfer */
+ desc = atc_desc_get(atchan);
+ if (!desc)
+ goto err_desc_get;
+
+ desc->lli.saddr = src;
+ desc->lli.daddr = dst;
+ desc->lli.ctrla = ctrla | xfer_count;
+ desc->lli.ctrlb = ctrlb;
+
+ desc->txd.cookie = 0;
+ desc->len = len;
+
+ /*
+ * Although we only need the transfer width for the first and
+ * the last descriptor, its easier to set it to all descriptors.
+ */
+ desc->tx_width = src_width;
+
+ atc_desc_chain(&first, &prev, desc);
+
+ /* update the lengths and addresses for the next loop cycle */
+ dst_len -= len;
+ src_len -= len;
+ dst += len;
+ src += len;
+
+ total_len += len;
+ }
+
+ /* First descriptor of the chain embedds additional information */
+ first->txd.cookie = -EBUSY;
+ first->total_len = total_len;
+
+ /* set end-of-link to the last link descriptor of list*/
+ set_desc_eol(desc);
+
+ first->txd.flags = flags; /* client is in control of this ack */
+
+ return &first->txd;
+
+err_desc_get:
+ atc_desc_put(atchan, first);
+ return NULL;
+}
+
/**
* atc_dma_cyclic_check_values
* Check for too big/unaligned periods and unaligned DMA buffer
/* setup platform data for each SoC */
dma_cap_set(DMA_MEMCPY, at91sam9rl_config.cap_mask);
+ dma_cap_set(DMA_SG, at91sam9rl_config.cap_mask);
dma_cap_set(DMA_MEMCPY, at91sam9g45_config.cap_mask);
dma_cap_set(DMA_SLAVE, at91sam9g45_config.cap_mask);
+ dma_cap_set(DMA_SG, at91sam9g45_config.cap_mask);
/* get DMA parameters from controller type */
plat_dat = at_dma_get_driver_data(pdev);
atdma->dma_common.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
}
+ if (dma_has_cap(DMA_SG, atdma->dma_common.cap_mask))
+ atdma->dma_common.device_prep_dma_sg = atc_prep_dma_sg;
+
dma_writel(atdma, EN, AT_DMA_ENABLE);
- dev_info(&pdev->dev, "Atmel AHB DMA Controller ( %s%s), %d channels\n",
+ dev_info(&pdev->dev, "Atmel AHB DMA Controller ( %s%s%s), %d channels\n",
dma_has_cap(DMA_MEMCPY, atdma->dma_common.cap_mask) ? "cpy " : "",
dma_has_cap(DMA_SLAVE, atdma->dma_common.cap_mask) ? "slave " : "",
+ dma_has_cap(DMA_SG, atdma->dma_common.cap_mask) ? "sg-cpy " : "",
plat_dat->nr_channels);
dma_async_device_register(&atdma->dma_common);
dev_dbg(chan2dev(chan), "%s\n", __func__);
spin_lock_bh(&atchan->lock);
- if (!at_xdmac_chan_is_paused(atchan))
+ if (!at_xdmac_chan_is_paused(atchan)) {
+ spin_unlock_bh(&atchan->lock);
return 0;
+ }
at_xdmac_write(atxdmac, AT_XDMAC_GRWR, atchan->mask);
clear_bit(AT_XDMAC_CHAN_IS_PAUSED, &atchan->status);
#define DRIVER_NAME "bestcomm-core"
/* MPC5200 device tree match tables */
-static struct of_device_id mpc52xx_sram_ids[] = {
+static const struct of_device_id mpc52xx_sram_ids[] = {
{ .compatible = "fsl,mpc5200-sram", },
{ .compatible = "mpc5200-sram", },
{}
return 0;
}
-static struct of_device_id mpc52xx_bcom_of_match[] = {
+static const struct of_device_id mpc52xx_bcom_of_match[] = {
{ .compatible = "fsl,mpc5200-bestcomm", },
{ .compatible = "mpc5200-bestcomm", },
{},
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
*/
#include <linux/dmaengine.h>
{
spin_lock(&chan->vchan.lock);
if (chan->desc) {
- if (chan->desc && chan->desc->cyclic) {
+ if (chan->desc->cyclic) {
vchan_cyclic_callback(&chan->desc->vdesc);
} else {
if (chan->next_sg == chan->desc->num_sgs) {
return status;
}
-static int jz4740_dma_alloc_chan_resources(struct dma_chan *c)
-{
- return 0;
-}
-
static void jz4740_dma_free_chan_resources(struct dma_chan *c)
{
vchan_free_chan_resources(to_virt_chan(c));
dma_cap_set(DMA_SLAVE, dd->cap_mask);
dma_cap_set(DMA_CYCLIC, dd->cap_mask);
- dd->device_alloc_chan_resources = jz4740_dma_alloc_chan_resources;
dd->device_free_chan_resources = jz4740_dma_free_chan_resources;
dd->device_tx_status = jz4740_dma_tx_status;
dd->device_issue_pending = jz4740_dma_issue_pending;
--- /dev/null
+/*
+ * Ingenic JZ4780 DMA controller
+ *
+ * Copyright (c) 2015 Imagination Technologies
+ * Author: Alex Smith <alex@alex-smith.me.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/dmapool.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "dmaengine.h"
+#include "virt-dma.h"
+
+#define JZ_DMA_NR_CHANNELS 32
+
+/* Global registers. */
+#define JZ_DMA_REG_DMAC 0x1000
+#define JZ_DMA_REG_DIRQP 0x1004
+#define JZ_DMA_REG_DDR 0x1008
+#define JZ_DMA_REG_DDRS 0x100c
+#define JZ_DMA_REG_DMACP 0x101c
+#define JZ_DMA_REG_DSIRQP 0x1020
+#define JZ_DMA_REG_DSIRQM 0x1024
+#define JZ_DMA_REG_DCIRQP 0x1028
+#define JZ_DMA_REG_DCIRQM 0x102c
+
+/* Per-channel registers. */
+#define JZ_DMA_REG_CHAN(n) (n * 0x20)
+#define JZ_DMA_REG_DSA(n) (0x00 + JZ_DMA_REG_CHAN(n))
+#define JZ_DMA_REG_DTA(n) (0x04 + JZ_DMA_REG_CHAN(n))
+#define JZ_DMA_REG_DTC(n) (0x08 + JZ_DMA_REG_CHAN(n))
+#define JZ_DMA_REG_DRT(n) (0x0c + JZ_DMA_REG_CHAN(n))
+#define JZ_DMA_REG_DCS(n) (0x10 + JZ_DMA_REG_CHAN(n))
+#define JZ_DMA_REG_DCM(n) (0x14 + JZ_DMA_REG_CHAN(n))
+#define JZ_DMA_REG_DDA(n) (0x18 + JZ_DMA_REG_CHAN(n))
+#define JZ_DMA_REG_DSD(n) (0x1c + JZ_DMA_REG_CHAN(n))
+
+#define JZ_DMA_DMAC_DMAE BIT(0)
+#define JZ_DMA_DMAC_AR BIT(2)
+#define JZ_DMA_DMAC_HLT BIT(3)
+#define JZ_DMA_DMAC_FMSC BIT(31)
+
+#define JZ_DMA_DRT_AUTO 0x8
+
+#define JZ_DMA_DCS_CTE BIT(0)
+#define JZ_DMA_DCS_HLT BIT(2)
+#define JZ_DMA_DCS_TT BIT(3)
+#define JZ_DMA_DCS_AR BIT(4)
+#define JZ_DMA_DCS_DES8 BIT(30)
+
+#define JZ_DMA_DCM_LINK BIT(0)
+#define JZ_DMA_DCM_TIE BIT(1)
+#define JZ_DMA_DCM_STDE BIT(2)
+#define JZ_DMA_DCM_TSZ_SHIFT 8
+#define JZ_DMA_DCM_TSZ_MASK (0x7 << JZ_DMA_DCM_TSZ_SHIFT)
+#define JZ_DMA_DCM_DP_SHIFT 12
+#define JZ_DMA_DCM_SP_SHIFT 14
+#define JZ_DMA_DCM_DAI BIT(22)
+#define JZ_DMA_DCM_SAI BIT(23)
+
+#define JZ_DMA_SIZE_4_BYTE 0x0
+#define JZ_DMA_SIZE_1_BYTE 0x1
+#define JZ_DMA_SIZE_2_BYTE 0x2
+#define JZ_DMA_SIZE_16_BYTE 0x3
+#define JZ_DMA_SIZE_32_BYTE 0x4
+#define JZ_DMA_SIZE_64_BYTE 0x5
+#define JZ_DMA_SIZE_128_BYTE 0x6
+
+#define JZ_DMA_WIDTH_32_BIT 0x0
+#define JZ_DMA_WIDTH_8_BIT 0x1
+#define JZ_DMA_WIDTH_16_BIT 0x2
+
+#define JZ_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
+
+/**
+ * struct jz4780_dma_hwdesc - descriptor structure read by the DMA controller.
+ * @dcm: value for the DCM (channel command) register
+ * @dsa: source address
+ * @dta: target address
+ * @dtc: transfer count (number of blocks of the transfer size specified in DCM
+ * to transfer) in the low 24 bits, offset of the next descriptor from the
+ * descriptor base address in the upper 8 bits.
+ * @sd: target/source stride difference (in stride transfer mode).
+ * @drt: request type
+ */
+struct jz4780_dma_hwdesc {
+ uint32_t dcm;
+ uint32_t dsa;
+ uint32_t dta;
+ uint32_t dtc;
+ uint32_t sd;
+ uint32_t drt;
+ uint32_t reserved[2];
+};
+
+/* Size of allocations for hardware descriptor blocks. */
+#define JZ_DMA_DESC_BLOCK_SIZE PAGE_SIZE
+#define JZ_DMA_MAX_DESC \
+ (JZ_DMA_DESC_BLOCK_SIZE / sizeof(struct jz4780_dma_hwdesc))
+
+struct jz4780_dma_desc {
+ struct virt_dma_desc vdesc;
+
+ struct jz4780_dma_hwdesc *desc;
+ dma_addr_t desc_phys;
+ unsigned int count;
+ enum dma_transaction_type type;
+ uint32_t status;
+};
+
+struct jz4780_dma_chan {
+ struct virt_dma_chan vchan;
+ unsigned int id;
+ struct dma_pool *desc_pool;
+
+ uint32_t transfer_type;
+ uint32_t transfer_shift;
+ struct dma_slave_config config;
+
+ struct jz4780_dma_desc *desc;
+ unsigned int curr_hwdesc;
+};
+
+struct jz4780_dma_dev {
+ struct dma_device dma_device;
+ void __iomem *base;
+ struct clk *clk;
+ unsigned int irq;
+
+ uint32_t chan_reserved;
+ struct jz4780_dma_chan chan[JZ_DMA_NR_CHANNELS];
+};
+
+struct jz4780_dma_data {
+ uint32_t transfer_type;
+ int channel;
+};
+
+static inline struct jz4780_dma_chan *to_jz4780_dma_chan(struct dma_chan *chan)
+{
+ return container_of(chan, struct jz4780_dma_chan, vchan.chan);
+}
+
+static inline struct jz4780_dma_desc *to_jz4780_dma_desc(
+ struct virt_dma_desc *vdesc)
+{
+ return container_of(vdesc, struct jz4780_dma_desc, vdesc);
+}
+
+static inline struct jz4780_dma_dev *jz4780_dma_chan_parent(
+ struct jz4780_dma_chan *jzchan)
+{
+ return container_of(jzchan->vchan.chan.device, struct jz4780_dma_dev,
+ dma_device);
+}
+
+static inline uint32_t jz4780_dma_readl(struct jz4780_dma_dev *jzdma,
+ unsigned int reg)
+{
+ return readl(jzdma->base + reg);
+}
+
+static inline void jz4780_dma_writel(struct jz4780_dma_dev *jzdma,
+ unsigned int reg, uint32_t val)
+{
+ writel(val, jzdma->base + reg);
+}
+
+static struct jz4780_dma_desc *jz4780_dma_desc_alloc(
+ struct jz4780_dma_chan *jzchan, unsigned int count,
+ enum dma_transaction_type type)
+{
+ struct jz4780_dma_desc *desc;
+
+ if (count > JZ_DMA_MAX_DESC)
+ return NULL;
+
+ desc = kzalloc(sizeof(*desc), GFP_NOWAIT);
+ if (!desc)
+ return NULL;
+
+ desc->desc = dma_pool_alloc(jzchan->desc_pool, GFP_NOWAIT,
+ &desc->desc_phys);
+ if (!desc->desc) {
+ kfree(desc);
+ return NULL;
+ }
+
+ desc->count = count;
+ desc->type = type;
+ return desc;
+}
+
+static void jz4780_dma_desc_free(struct virt_dma_desc *vdesc)
+{
+ struct jz4780_dma_desc *desc = to_jz4780_dma_desc(vdesc);
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(vdesc->tx.chan);
+
+ dma_pool_free(jzchan->desc_pool, desc->desc, desc->desc_phys);
+ kfree(desc);
+}
+
+static uint32_t jz4780_dma_transfer_size(unsigned long val, int *ord)
+{
+ *ord = ffs(val) - 1;
+
+ switch (*ord) {
+ case 0:
+ return JZ_DMA_SIZE_1_BYTE;
+ case 1:
+ return JZ_DMA_SIZE_2_BYTE;
+ case 2:
+ return JZ_DMA_SIZE_4_BYTE;
+ case 4:
+ return JZ_DMA_SIZE_16_BYTE;
+ case 5:
+ return JZ_DMA_SIZE_32_BYTE;
+ case 6:
+ return JZ_DMA_SIZE_64_BYTE;
+ case 7:
+ return JZ_DMA_SIZE_128_BYTE;
+ default:
+ return -EINVAL;
+ }
+}
+
+static uint32_t jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan,
+ struct jz4780_dma_hwdesc *desc, dma_addr_t addr, size_t len,
+ enum dma_transfer_direction direction)
+{
+ struct dma_slave_config *config = &jzchan->config;
+ uint32_t width, maxburst, tsz;
+ int ord;
+
+ if (direction == DMA_MEM_TO_DEV) {
+ desc->dcm = JZ_DMA_DCM_SAI;
+ desc->dsa = addr;
+ desc->dta = config->dst_addr;
+ desc->drt = jzchan->transfer_type;
+
+ width = config->dst_addr_width;
+ maxburst = config->dst_maxburst;
+ } else {
+ desc->dcm = JZ_DMA_DCM_DAI;
+ desc->dsa = config->src_addr;
+ desc->dta = addr;
+ desc->drt = jzchan->transfer_type;
+
+ width = config->src_addr_width;
+ maxburst = config->src_maxburst;
+ }
+
+ /*
+ * This calculates the maximum transfer size that can be used with the
+ * given address, length, width and maximum burst size. The address
+ * must be aligned to the transfer size, the total length must be
+ * divisible by the transfer size, and we must not use more than the
+ * maximum burst specified by the user.
+ */
+ tsz = jz4780_dma_transfer_size(addr | len | (width * maxburst), &ord);
+ jzchan->transfer_shift = ord;
+
+ switch (width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ break;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ width = JZ_DMA_WIDTH_32_BIT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ desc->dcm |= tsz << JZ_DMA_DCM_TSZ_SHIFT;
+ desc->dcm |= width << JZ_DMA_DCM_SP_SHIFT;
+ desc->dcm |= width << JZ_DMA_DCM_DP_SHIFT;
+
+ desc->dtc = len >> ord;
+}
+
+static struct dma_async_tx_descriptor *jz4780_dma_prep_slave_sg(
+ struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len,
+ enum dma_transfer_direction direction, unsigned long flags)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+ struct jz4780_dma_desc *desc;
+ unsigned int i;
+ int err;
+
+ desc = jz4780_dma_desc_alloc(jzchan, sg_len, DMA_SLAVE);
+ if (!desc)
+ return NULL;
+
+ for (i = 0; i < sg_len; i++) {
+ err = jz4780_dma_setup_hwdesc(jzchan, &desc->desc[i],
+ sg_dma_address(&sgl[i]),
+ sg_dma_len(&sgl[i]),
+ direction);
+ if (err < 0)
+ return ERR_PTR(err);
+
+
+ desc->desc[i].dcm |= JZ_DMA_DCM_TIE;
+
+ if (i != (sg_len - 1)) {
+ /* Automatically proceeed to the next descriptor. */
+ desc->desc[i].dcm |= JZ_DMA_DCM_LINK;
+
+ /*
+ * The upper 8 bits of the DTC field in the descriptor
+ * must be set to (offset from descriptor base of next
+ * descriptor >> 4).
+ */
+ desc->desc[i].dtc |=
+ (((i + 1) * sizeof(*desc->desc)) >> 4) << 24;
+ }
+ }
+
+ return vchan_tx_prep(&jzchan->vchan, &desc->vdesc, flags);
+}
+
+static struct dma_async_tx_descriptor *jz4780_dma_prep_dma_cyclic(
+ struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
+ size_t period_len, enum dma_transfer_direction direction,
+ unsigned long flags)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+ struct jz4780_dma_desc *desc;
+ unsigned int periods, i;
+ int err;
+
+ if (buf_len % period_len)
+ return NULL;
+
+ periods = buf_len / period_len;
+
+ desc = jz4780_dma_desc_alloc(jzchan, periods, DMA_CYCLIC);
+ if (!desc)
+ return NULL;
+
+ for (i = 0; i < periods; i++) {
+ err = jz4780_dma_setup_hwdesc(jzchan, &desc->desc[i], buf_addr,
+ period_len, direction);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ buf_addr += period_len;
+
+ /*
+ * Set the link bit to indicate that the controller should
+ * automatically proceed to the next descriptor. In
+ * jz4780_dma_begin(), this will be cleared if we need to issue
+ * an interrupt after each period.
+ */
+ desc->desc[i].dcm |= JZ_DMA_DCM_TIE | JZ_DMA_DCM_LINK;
+
+ /*
+ * The upper 8 bits of the DTC field in the descriptor must be
+ * set to (offset from descriptor base of next descriptor >> 4).
+ * If this is the last descriptor, link it back to the first,
+ * i.e. leave offset set to 0, otherwise point to the next one.
+ */
+ if (i != (periods - 1)) {
+ desc->desc[i].dtc |=
+ (((i + 1) * sizeof(*desc->desc)) >> 4) << 24;
+ }
+ }
+
+ return vchan_tx_prep(&jzchan->vchan, &desc->vdesc, flags);
+}
+
+struct dma_async_tx_descriptor *jz4780_dma_prep_dma_memcpy(
+ struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
+ size_t len, unsigned long flags)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+ struct jz4780_dma_desc *desc;
+ uint32_t tsz;
+ int ord;
+
+ desc = jz4780_dma_desc_alloc(jzchan, 1, DMA_MEMCPY);
+ if (!desc)
+ return NULL;
+
+ tsz = jz4780_dma_transfer_size(dest | src | len, &ord);
+ if (tsz < 0)
+ return ERR_PTR(tsz);
+
+ desc->desc[0].dsa = src;
+ desc->desc[0].dta = dest;
+ desc->desc[0].drt = JZ_DMA_DRT_AUTO;
+ desc->desc[0].dcm = JZ_DMA_DCM_TIE | JZ_DMA_DCM_SAI | JZ_DMA_DCM_DAI |
+ tsz << JZ_DMA_DCM_TSZ_SHIFT |
+ JZ_DMA_WIDTH_32_BIT << JZ_DMA_DCM_SP_SHIFT |
+ JZ_DMA_WIDTH_32_BIT << JZ_DMA_DCM_DP_SHIFT;
+ desc->desc[0].dtc = len >> ord;
+
+ return vchan_tx_prep(&jzchan->vchan, &desc->vdesc, flags);
+}
+
+static void jz4780_dma_begin(struct jz4780_dma_chan *jzchan)
+{
+ struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
+ struct virt_dma_desc *vdesc;
+ unsigned int i;
+ dma_addr_t desc_phys;
+
+ if (!jzchan->desc) {
+ vdesc = vchan_next_desc(&jzchan->vchan);
+ if (!vdesc)
+ return;
+
+ list_del(&vdesc->node);
+
+ jzchan->desc = to_jz4780_dma_desc(vdesc);
+ jzchan->curr_hwdesc = 0;
+
+ if (jzchan->desc->type == DMA_CYCLIC && vdesc->tx.callback) {
+ /*
+ * The DMA controller doesn't support triggering an
+ * interrupt after processing each descriptor, only
+ * after processing an entire terminated list of
+ * descriptors. For a cyclic DMA setup the list of
+ * descriptors is not terminated so we can never get an
+ * interrupt.
+ *
+ * If the user requested a callback for a cyclic DMA
+ * setup then we workaround this hardware limitation
+ * here by degrading to a set of unlinked descriptors
+ * which we will submit in sequence in response to the
+ * completion of processing the previous descriptor.
+ */
+ for (i = 0; i < jzchan->desc->count; i++)
+ jzchan->desc->desc[i].dcm &= ~JZ_DMA_DCM_LINK;
+ }
+ } else {
+ /*
+ * There is an existing transfer, therefore this must be one
+ * for which we unlinked the descriptors above. Advance to the
+ * next one in the list.
+ */
+ jzchan->curr_hwdesc =
+ (jzchan->curr_hwdesc + 1) % jzchan->desc->count;
+ }
+
+ /* Use 8-word descriptors. */
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), JZ_DMA_DCS_DES8);
+
+ /* Write descriptor address and initiate descriptor fetch. */
+ desc_phys = jzchan->desc->desc_phys +
+ (jzchan->curr_hwdesc * sizeof(*jzchan->desc->desc));
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DDA(jzchan->id), desc_phys);
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DDRS, BIT(jzchan->id));
+
+ /* Enable the channel. */
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id),
+ JZ_DMA_DCS_DES8 | JZ_DMA_DCS_CTE);
+}
+
+static void jz4780_dma_issue_pending(struct dma_chan *chan)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&jzchan->vchan.lock, flags);
+
+ if (vchan_issue_pending(&jzchan->vchan) && !jzchan->desc)
+ jz4780_dma_begin(jzchan);
+
+ spin_unlock_irqrestore(&jzchan->vchan.lock, flags);
+}
+
+static int jz4780_dma_terminate_all(struct jz4780_dma_chan *jzchan)
+{
+ struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
+ unsigned long flags;
+ LIST_HEAD(head);
+
+ spin_lock_irqsave(&jzchan->vchan.lock, flags);
+
+ /* Clear the DMA status and stop the transfer. */
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0);
+ if (jzchan->desc) {
+ jz4780_dma_desc_free(&jzchan->desc->vdesc);
+ jzchan->desc = NULL;
+ }
+
+ vchan_get_all_descriptors(&jzchan->vchan, &head);
+
+ spin_unlock_irqrestore(&jzchan->vchan.lock, flags);
+
+ vchan_dma_desc_free_list(&jzchan->vchan, &head);
+ return 0;
+}
+
+static int jz4780_dma_slave_config(struct jz4780_dma_chan *jzchan,
+ const struct dma_slave_config *config)
+{
+ if ((config->src_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES)
+ || (config->dst_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES))
+ return -EINVAL;
+
+ /* Copy the reset of the slave configuration, it is used later. */
+ memcpy(&jzchan->config, config, sizeof(jzchan->config));
+
+ return 0;
+}
+
+static size_t jz4780_dma_desc_residue(struct jz4780_dma_chan *jzchan,
+ struct jz4780_dma_desc *desc, unsigned int next_sg)
+{
+ struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
+ unsigned int residue, count;
+ unsigned int i;
+
+ residue = 0;
+
+ for (i = next_sg; i < desc->count; i++)
+ residue += desc->desc[i].dtc << jzchan->transfer_shift;
+
+ if (next_sg != 0) {
+ count = jz4780_dma_readl(jzdma,
+ JZ_DMA_REG_DTC(jzchan->id));
+ residue += count << jzchan->transfer_shift;
+ }
+
+ return residue;
+}
+
+static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie, struct dma_tx_state *txstate)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+ struct virt_dma_desc *vdesc;
+ enum dma_status status;
+ unsigned long flags;
+
+ status = dma_cookie_status(chan, cookie, txstate);
+ if ((status == DMA_COMPLETE) || (txstate == NULL))
+ return status;
+
+ spin_lock_irqsave(&jzchan->vchan.lock, flags);
+
+ vdesc = vchan_find_desc(&jzchan->vchan, cookie);
+ if (vdesc) {
+ /* On the issued list, so hasn't been processed yet */
+ txstate->residue = jz4780_dma_desc_residue(jzchan,
+ to_jz4780_dma_desc(vdesc), 0);
+ } else if (cookie == jzchan->desc->vdesc.tx.cookie) {
+ txstate->residue = jz4780_dma_desc_residue(jzchan, jzchan->desc,
+ (jzchan->curr_hwdesc + 1) % jzchan->desc->count);
+ } else
+ txstate->residue = 0;
+
+ if (vdesc && jzchan->desc && vdesc == &jzchan->desc->vdesc
+ && jzchan->desc->status & (JZ_DMA_DCS_AR | JZ_DMA_DCS_HLT))
+ status = DMA_ERROR;
+
+ spin_unlock_irqrestore(&jzchan->vchan.lock, flags);
+ return status;
+}
+
+static void jz4780_dma_chan_irq(struct jz4780_dma_dev *jzdma,
+ struct jz4780_dma_chan *jzchan)
+{
+ uint32_t dcs;
+
+ spin_lock(&jzchan->vchan.lock);
+
+ dcs = jz4780_dma_readl(jzdma, JZ_DMA_REG_DCS(jzchan->id));
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0);
+
+ if (dcs & JZ_DMA_DCS_AR) {
+ dev_warn(&jzchan->vchan.chan.dev->device,
+ "address error (DCS=0x%x)\n", dcs);
+ }
+
+ if (dcs & JZ_DMA_DCS_HLT) {
+ dev_warn(&jzchan->vchan.chan.dev->device,
+ "channel halt (DCS=0x%x)\n", dcs);
+ }
+
+ if (jzchan->desc) {
+ jzchan->desc->status = dcs;
+
+ if ((dcs & (JZ_DMA_DCS_AR | JZ_DMA_DCS_HLT)) == 0) {
+ if (jzchan->desc->type == DMA_CYCLIC) {
+ vchan_cyclic_callback(&jzchan->desc->vdesc);
+ } else {
+ vchan_cookie_complete(&jzchan->desc->vdesc);
+ jzchan->desc = NULL;
+ }
+
+ jz4780_dma_begin(jzchan);
+ }
+ } else {
+ dev_err(&jzchan->vchan.chan.dev->device,
+ "channel IRQ with no active transfer\n");
+ }
+
+ spin_unlock(&jzchan->vchan.lock);
+}
+
+static irqreturn_t jz4780_dma_irq_handler(int irq, void *data)
+{
+ struct jz4780_dma_dev *jzdma = data;
+ uint32_t pending, dmac;
+ int i;
+
+ pending = jz4780_dma_readl(jzdma, JZ_DMA_REG_DIRQP);
+
+ for (i = 0; i < JZ_DMA_NR_CHANNELS; i++) {
+ if (!(pending & (1<<i)))
+ continue;
+
+ jz4780_dma_chan_irq(jzdma, &jzdma->chan[i]);
+ }
+
+ /* Clear halt and address error status of all channels. */
+ dmac = jz4780_dma_readl(jzdma, JZ_DMA_REG_DMAC);
+ dmac &= ~(JZ_DMA_DMAC_HLT | JZ_DMA_DMAC_AR);
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DMAC, dmac);
+
+ /* Clear interrupt pending status. */
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DIRQP, 0);
+
+ return IRQ_HANDLED;
+}
+
+static int jz4780_dma_alloc_chan_resources(struct dma_chan *chan)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+
+ jzchan->desc_pool = dma_pool_create(dev_name(&chan->dev->device),
+ chan->device->dev,
+ JZ_DMA_DESC_BLOCK_SIZE,
+ PAGE_SIZE, 0);
+ if (!jzchan->desc_pool) {
+ dev_err(&chan->dev->device,
+ "failed to allocate descriptor pool\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void jz4780_dma_free_chan_resources(struct dma_chan *chan)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+
+ vchan_free_chan_resources(&jzchan->vchan);
+ dma_pool_destroy(jzchan->desc_pool);
+ jzchan->desc_pool = NULL;
+}
+
+static bool jz4780_dma_filter_fn(struct dma_chan *chan, void *param)
+{
+ struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
+ struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
+ struct jz4780_dma_data *data = param;
+
+ if (data->channel > -1) {
+ if (data->channel != jzchan->id)
+ return false;
+ } else if (jzdma->chan_reserved & BIT(jzchan->id)) {
+ return false;
+ }
+
+ jzchan->transfer_type = data->transfer_type;
+
+ return true;
+}
+
+static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct jz4780_dma_dev *jzdma = ofdma->of_dma_data;
+ dma_cap_mask_t mask = jzdma->dma_device.cap_mask;
+ struct jz4780_dma_data data;
+
+ if (dma_spec->args_count != 2)
+ return NULL;
+
+ data.transfer_type = dma_spec->args[0];
+ data.channel = dma_spec->args[1];
+
+ if (data.channel > -1) {
+ if (data.channel >= JZ_DMA_NR_CHANNELS) {
+ dev_err(jzdma->dma_device.dev,
+ "device requested non-existent channel %u\n",
+ data.channel);
+ return NULL;
+ }
+
+ /* Can only select a channel marked as reserved. */
+ if (!(jzdma->chan_reserved & BIT(data.channel))) {
+ dev_err(jzdma->dma_device.dev,
+ "device requested unreserved channel %u\n",
+ data.channel);
+ return NULL;
+ }
+ }
+
+ return dma_request_channel(mask, jz4780_dma_filter_fn, &data);
+}
+
+static int jz4780_dma_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct jz4780_dma_dev *jzdma;
+ struct jz4780_dma_chan *jzchan;
+ struct dma_device *dd;
+ struct resource *res;
+ int i, ret;
+
+ jzdma = devm_kzalloc(dev, sizeof(*jzdma), GFP_KERNEL);
+ if (!jzdma)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, jzdma);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "failed to get I/O memory\n");
+ return -EINVAL;
+ }
+
+ jzdma->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(jzdma->base))
+ return PTR_ERR(jzdma->base);
+
+ jzdma->irq = platform_get_irq(pdev, 0);
+ if (jzdma->irq < 0) {
+ dev_err(dev, "failed to get IRQ: %d\n", ret);
+ return jzdma->irq;
+ }
+
+ ret = devm_request_irq(dev, jzdma->irq, jz4780_dma_irq_handler, 0,
+ dev_name(dev), jzdma);
+ if (ret) {
+ dev_err(dev, "failed to request IRQ %u!\n", jzdma->irq);
+ return -EINVAL;
+ }
+
+ jzdma->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(jzdma->clk)) {
+ dev_err(dev, "failed to get clock\n");
+ return PTR_ERR(jzdma->clk);
+ }
+
+ clk_prepare_enable(jzdma->clk);
+
+ /* Property is optional, if it doesn't exist the value will remain 0. */
+ of_property_read_u32_index(dev->of_node, "ingenic,reserved-channels",
+ 0, &jzdma->chan_reserved);
+
+ dd = &jzdma->dma_device;
+
+ dma_cap_set(DMA_MEMCPY, dd->cap_mask);
+ dma_cap_set(DMA_SLAVE, dd->cap_mask);
+ dma_cap_set(DMA_CYCLIC, dd->cap_mask);
+
+ dd->dev = dev;
+ dd->copy_align = 2; /* 2^2 = 4 byte alignment */
+ dd->device_alloc_chan_resources = jz4780_dma_alloc_chan_resources;
+ dd->device_free_chan_resources = jz4780_dma_free_chan_resources;
+ dd->device_prep_slave_sg = jz4780_dma_prep_slave_sg;
+ dd->device_prep_dma_cyclic = jz4780_dma_prep_dma_cyclic;
+ dd->device_prep_dma_memcpy = jz4780_dma_prep_dma_memcpy;
+ dd->device_config = jz4780_dma_slave_config;
+ dd->device_terminate_all = jz4780_dma_terminate_all;
+ dd->device_tx_status = jz4780_dma_tx_status;
+ dd->device_issue_pending = jz4780_dma_issue_pending;
+ dd->src_addr_widths = JZ_DMA_BUSWIDTHS;
+ dd->dst_addr_widths = JZ_DMA_BUSWIDTHS;
+ dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ dd->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+
+
+ /*
+ * Enable DMA controller, mark all channels as not programmable.
+ * Also set the FMSC bit - it increases MSC performance, so it makes
+ * little sense not to enable it.
+ */
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DMAC,
+ JZ_DMA_DMAC_DMAE | JZ_DMA_DMAC_FMSC);
+ jz4780_dma_writel(jzdma, JZ_DMA_REG_DMACP, 0);
+
+ INIT_LIST_HEAD(&dd->channels);
+
+ for (i = 0; i < JZ_DMA_NR_CHANNELS; i++) {
+ jzchan = &jzdma->chan[i];
+ jzchan->id = i;
+
+ vchan_init(&jzchan->vchan, dd);
+ jzchan->vchan.desc_free = jz4780_dma_desc_free;
+ }
+
+ ret = dma_async_device_register(dd);
+ if (ret) {
+ dev_err(dev, "failed to register device\n");
+ goto err_disable_clk;
+ }
+
+ /* Register with OF DMA helpers. */
+ ret = of_dma_controller_register(dev->of_node, jz4780_of_dma_xlate,
+ jzdma);
+ if (ret) {
+ dev_err(dev, "failed to register OF DMA controller\n");
+ goto err_unregister_dev;
+ }
+
+ dev_info(dev, "JZ4780 DMA controller initialised\n");
+ return 0;
+
+err_unregister_dev:
+ dma_async_device_unregister(dd);
+
+err_disable_clk:
+ clk_disable_unprepare(jzdma->clk);
+ return ret;
+}
+
+static int jz4780_dma_remove(struct platform_device *pdev)
+{
+ struct jz4780_dma_dev *jzdma = platform_get_drvdata(pdev);
+
+ of_dma_controller_free(pdev->dev.of_node);
+ devm_free_irq(&pdev->dev, jzdma->irq, jzdma);
+ dma_async_device_unregister(&jzdma->dma_device);
+ return 0;
+}
+
+static const struct of_device_id jz4780_dma_dt_match[] = {
+ { .compatible = "ingenic,jz4780-dma", .data = NULL },
+ {},
+};
+MODULE_DEVICE_TABLE(of, jz4780_dma_dt_match);
+
+static struct platform_driver jz4780_dma_driver = {
+ .probe = jz4780_dma_probe,
+ .remove = jz4780_dma_remove,
+ .driver = {
+ .name = "jz4780-dma",
+ .of_match_table = of_match_ptr(jz4780_dma_dt_match),
+ },
+};
+
+static int __init jz4780_dma_init(void)
+{
+ return platform_driver_register(&jz4780_dma_driver);
+}
+subsys_initcall(jz4780_dma_init);
+
+static void __exit jz4780_dma_exit(void)
+{
+ platform_driver_unregister(&jz4780_dma_driver);
+}
+module_exit(jz4780_dma_exit);
+
+MODULE_AUTHOR("Alex Smith <alex@alex-smith.me.uk>");
+MODULE_DESCRIPTION("Ingenic JZ4780 DMA controller driver");
+MODULE_LICENSE("GPL");
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
}
EXPORT_SYMBOL(dma_find_channel);
-/*
- * net_dma_find_channel - find a channel for net_dma
- * net_dma has alignment requirements
- */
-struct dma_chan *net_dma_find_channel(void)
-{
- struct dma_chan *chan = dma_find_channel(DMA_MEMCPY);
- if (chan && !is_dma_copy_aligned(chan->device, 1, 1, 1))
- return NULL;
-
- return chan;
-}
-EXPORT_SYMBOL(net_dma_find_channel);
-
/**
* dma_issue_pending_all - flush all pending operations across all channels
*/
#
config DW_DMAC_CORE
- tristate "Synopsys DesignWare AHB DMA support"
+ tristate
select DMA_ENGINE
config DW_DMAC
/* ASSERT: channel is idle */
if (dma_readl(dw, CH_EN) & dwc->mask) {
dev_err(chan2dev(&dwc->chan),
- "BUG: Attempted to start non-idle channel\n");
+ "%s: BUG: Attempted to start non-idle channel\n",
+ __func__);
dwc_dump_chan_regs(dwc);
/* The tasklet will hopefully advance the queue... */
slave_sg_todev_fill_desc:
desc = dwc_desc_get(dwc);
- if (!desc) {
- dev_err(chan2dev(chan),
- "not enough descriptors available\n");
+ if (!desc)
goto err_desc_get;
- }
desc->lli.sar = mem;
desc->lli.dar = reg;
slave_sg_fromdev_fill_desc:
desc = dwc_desc_get(dwc);
- if (!desc) {
- dev_err(chan2dev(chan),
- "not enough descriptors available\n");
+ if (!desc)
goto err_desc_get;
- }
desc->lli.sar = reg;
desc->lli.dar = mem;
return &first->txd;
err_desc_get:
+ dev_err(chan2dev(chan),
+ "not enough descriptors available. Direction %d\n", direction);
dwc_desc_put(dwc, first);
return NULL;
}
/* Assert channel is idle */
if (dma_readl(dw, CH_EN) & dwc->mask) {
dev_err(chan2dev(&dwc->chan),
- "BUG: Attempted to start non-idle channel\n");
+ "%s: BUG: Attempted to start non-idle channel\n",
+ __func__);
dwc_dump_chan_regs(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
return -EBUSY;
LIST_HEAD(descs);
a_ch_num = edma_alloc_channel(echan->ch_num, edma_callback,
- chan, EVENTQ_DEFAULT);
+ echan, EVENTQ_DEFAULT);
if (a_ch_num < 0) {
ret = -ENODEV;
--- /dev/null
+/*
+ * drivers/dma/fsl_raid.c
+ *
+ * Freescale RAID Engine device driver
+ *
+ * Author:
+ * Harninder Rai <harninder.rai@freescale.com>
+ * Naveen Burmi <naveenburmi@freescale.com>
+ *
+ * Rewrite:
+ * Xuelin Shi <xuelin.shi@freescale.com>
+ *
+ * Copyright (c) 2010-2014 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Theory of operation:
+ *
+ * General capabilities:
+ * RAID Engine (RE) block is capable of offloading XOR, memcpy and P/Q
+ * calculations required in RAID5 and RAID6 operations. RE driver
+ * registers with Linux's ASYNC layer as dma driver. RE hardware
+ * maintains strict ordering of the requests through chained
+ * command queueing.
+ *
+ * Data flow:
+ * Software RAID layer of Linux (MD layer) maintains RAID partitions,
+ * strips, stripes etc. It sends requests to the underlying ASYNC layer
+ * which further passes it to RE driver. ASYNC layer decides which request
+ * goes to which job ring of RE hardware. For every request processed by
+ * RAID Engine, driver gets an interrupt unless coalescing is set. The
+ * per job ring interrupt handler checks the status register for errors,
+ * clears the interrupt and leave the post interrupt processing to the irq
+ * thread.
+ */
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/dmaengine.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+
+#include "dmaengine.h"
+#include "fsl_raid.h"
+
+#define FSL_RE_MAX_XOR_SRCS 16
+#define FSL_RE_MAX_PQ_SRCS 16
+#define FSL_RE_MIN_DESCS 256
+#define FSL_RE_MAX_DESCS (4 * FSL_RE_MIN_DESCS)
+#define FSL_RE_FRAME_FORMAT 0x1
+#define FSL_RE_MAX_DATA_LEN (1024*1024)
+
+#define to_fsl_re_dma_desc(tx) container_of(tx, struct fsl_re_desc, async_tx)
+
+/* Add descriptors into per chan software queue - submit_q */
+static dma_cookie_t fsl_re_tx_submit(struct dma_async_tx_descriptor *tx)
+{
+ struct fsl_re_desc *desc;
+ struct fsl_re_chan *re_chan;
+ dma_cookie_t cookie;
+ unsigned long flags;
+
+ desc = to_fsl_re_dma_desc(tx);
+ re_chan = container_of(tx->chan, struct fsl_re_chan, chan);
+
+ spin_lock_irqsave(&re_chan->desc_lock, flags);
+ cookie = dma_cookie_assign(tx);
+ list_add_tail(&desc->node, &re_chan->submit_q);
+ spin_unlock_irqrestore(&re_chan->desc_lock, flags);
+
+ return cookie;
+}
+
+/* Copy descriptor from per chan software queue into hardware job ring */
+static void fsl_re_issue_pending(struct dma_chan *chan)
+{
+ struct fsl_re_chan *re_chan;
+ int avail;
+ struct fsl_re_desc *desc, *_desc;
+ unsigned long flags;
+
+ re_chan = container_of(chan, struct fsl_re_chan, chan);
+
+ spin_lock_irqsave(&re_chan->desc_lock, flags);
+ avail = FSL_RE_SLOT_AVAIL(
+ in_be32(&re_chan->jrregs->inbring_slot_avail));
+
+ list_for_each_entry_safe(desc, _desc, &re_chan->submit_q, node) {
+ if (!avail)
+ break;
+
+ list_move_tail(&desc->node, &re_chan->active_q);
+
+ memcpy(&re_chan->inb_ring_virt_addr[re_chan->inb_count],
+ &desc->hwdesc, sizeof(struct fsl_re_hw_desc));
+
+ re_chan->inb_count = (re_chan->inb_count + 1) &
+ FSL_RE_RING_SIZE_MASK;
+ out_be32(&re_chan->jrregs->inbring_add_job, FSL_RE_ADD_JOB(1));
+ avail--;
+ }
+ spin_unlock_irqrestore(&re_chan->desc_lock, flags);
+}
+
+static void fsl_re_desc_done(struct fsl_re_desc *desc)
+{
+ dma_async_tx_callback callback;
+ void *callback_param;
+
+ dma_cookie_complete(&desc->async_tx);
+
+ callback = desc->async_tx.callback;
+ callback_param = desc->async_tx.callback_param;
+ if (callback)
+ callback(callback_param);
+
+ dma_descriptor_unmap(&desc->async_tx);
+}
+
+static void fsl_re_cleanup_descs(struct fsl_re_chan *re_chan)
+{
+ struct fsl_re_desc *desc, *_desc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&re_chan->desc_lock, flags);
+ list_for_each_entry_safe(desc, _desc, &re_chan->ack_q, node) {
+ if (async_tx_test_ack(&desc->async_tx))
+ list_move_tail(&desc->node, &re_chan->free_q);
+ }
+ spin_unlock_irqrestore(&re_chan->desc_lock, flags);
+
+ fsl_re_issue_pending(&re_chan->chan);
+}
+
+static void fsl_re_dequeue(unsigned long data)
+{
+ struct fsl_re_chan *re_chan;
+ struct fsl_re_desc *desc, *_desc;
+ struct fsl_re_hw_desc *hwdesc;
+ unsigned long flags;
+ unsigned int count, oub_count;
+ int found;
+
+ re_chan = dev_get_drvdata((struct device *)data);
+
+ fsl_re_cleanup_descs(re_chan);
+
+ spin_lock_irqsave(&re_chan->desc_lock, flags);
+ count = FSL_RE_SLOT_FULL(in_be32(&re_chan->jrregs->oubring_slot_full));
+ while (count--) {
+ found = 0;
+ hwdesc = &re_chan->oub_ring_virt_addr[re_chan->oub_count];
+ list_for_each_entry_safe(desc, _desc, &re_chan->active_q,
+ node) {
+ /* compare the hw dma addr to find the completed */
+ if (desc->hwdesc.lbea32 == hwdesc->lbea32 &&
+ desc->hwdesc.addr_low == hwdesc->addr_low) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (found) {
+ fsl_re_desc_done(desc);
+ list_move_tail(&desc->node, &re_chan->ack_q);
+ } else {
+ dev_err(re_chan->dev,
+ "found hwdesc not in sw queue, discard it\n");
+ }
+
+ oub_count = (re_chan->oub_count + 1) & FSL_RE_RING_SIZE_MASK;
+ re_chan->oub_count = oub_count;
+
+ out_be32(&re_chan->jrregs->oubring_job_rmvd,
+ FSL_RE_RMVD_JOB(1));
+ }
+ spin_unlock_irqrestore(&re_chan->desc_lock, flags);
+}
+
+/* Per Job Ring interrupt handler */
+static irqreturn_t fsl_re_isr(int irq, void *data)
+{
+ struct fsl_re_chan *re_chan;
+ u32 irqstate, status;
+
+ re_chan = dev_get_drvdata((struct device *)data);
+
+ irqstate = in_be32(&re_chan->jrregs->jr_interrupt_status);
+ if (!irqstate)
+ return IRQ_NONE;
+
+ /*
+ * There's no way in upper layer (read MD layer) to recover from
+ * error conditions except restart everything. In long term we
+ * need to do something more than just crashing
+ */
+ if (irqstate & FSL_RE_ERROR) {
+ status = in_be32(&re_chan->jrregs->jr_status);
+ dev_err(re_chan->dev, "chan error irqstate: %x, status: %x\n",
+ irqstate, status);
+ }
+
+ /* Clear interrupt */
+ out_be32(&re_chan->jrregs->jr_interrupt_status, FSL_RE_CLR_INTR);
+
+ tasklet_schedule(&re_chan->irqtask);
+
+ return IRQ_HANDLED;
+}
+
+static enum dma_status fsl_re_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ return dma_cookie_status(chan, cookie, txstate);
+}
+
+static void fill_cfd_frame(struct fsl_re_cmpnd_frame *cf, u8 index,
+ size_t length, dma_addr_t addr, bool final)
+{
+ u32 efrl = length & FSL_RE_CF_LENGTH_MASK;
+
+ efrl |= final << FSL_RE_CF_FINAL_SHIFT;
+ cf[index].efrl32 = efrl;
+ cf[index].addr_high = upper_32_bits(addr);
+ cf[index].addr_low = lower_32_bits(addr);
+}
+
+static struct fsl_re_desc *fsl_re_init_desc(struct fsl_re_chan *re_chan,
+ struct fsl_re_desc *desc,
+ void *cf, dma_addr_t paddr)
+{
+ desc->re_chan = re_chan;
+ desc->async_tx.tx_submit = fsl_re_tx_submit;
+ dma_async_tx_descriptor_init(&desc->async_tx, &re_chan->chan);
+ INIT_LIST_HEAD(&desc->node);
+
+ desc->hwdesc.fmt32 = FSL_RE_FRAME_FORMAT << FSL_RE_HWDESC_FMT_SHIFT;
+ desc->hwdesc.lbea32 = upper_32_bits(paddr);
+ desc->hwdesc.addr_low = lower_32_bits(paddr);
+ desc->cf_addr = cf;
+ desc->cf_paddr = paddr;
+
+ desc->cdb_addr = (void *)(cf + FSL_RE_CF_DESC_SIZE);
+ desc->cdb_paddr = paddr + FSL_RE_CF_DESC_SIZE;
+
+ return desc;
+}
+
+static struct fsl_re_desc *fsl_re_chan_alloc_desc(struct fsl_re_chan *re_chan,
+ unsigned long flags)
+{
+ struct fsl_re_desc *desc = NULL;
+ void *cf;
+ dma_addr_t paddr;
+ unsigned long lock_flag;
+
+ fsl_re_cleanup_descs(re_chan);
+
+ spin_lock_irqsave(&re_chan->desc_lock, lock_flag);
+ if (!list_empty(&re_chan->free_q)) {
+ /* take one desc from free_q */
+ desc = list_first_entry(&re_chan->free_q,
+ struct fsl_re_desc, node);
+ list_del(&desc->node);
+
+ desc->async_tx.flags = flags;
+ }
+ spin_unlock_irqrestore(&re_chan->desc_lock, lock_flag);
+
+ if (!desc) {
+ desc = kzalloc(sizeof(*desc), GFP_NOWAIT);
+ if (!desc)
+ return NULL;
+
+ cf = dma_pool_alloc(re_chan->re_dev->cf_desc_pool, GFP_NOWAIT,
+ &paddr);
+ if (!cf) {
+ kfree(desc);
+ return NULL;
+ }
+
+ desc = fsl_re_init_desc(re_chan, desc, cf, paddr);
+ desc->async_tx.flags = flags;
+
+ spin_lock_irqsave(&re_chan->desc_lock, lock_flag);
+ re_chan->alloc_count++;
+ spin_unlock_irqrestore(&re_chan->desc_lock, lock_flag);
+ }
+
+ return desc;
+}
+
+static struct dma_async_tx_descriptor *fsl_re_prep_dma_genq(
+ struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
+ unsigned int src_cnt, const unsigned char *scf, size_t len,
+ unsigned long flags)
+{
+ struct fsl_re_chan *re_chan;
+ struct fsl_re_desc *desc;
+ struct fsl_re_xor_cdb *xor;
+ struct fsl_re_cmpnd_frame *cf;
+ u32 cdb;
+ unsigned int i, j;
+ unsigned int save_src_cnt = src_cnt;
+ int cont_q = 0;
+
+ re_chan = container_of(chan, struct fsl_re_chan, chan);
+ if (len > FSL_RE_MAX_DATA_LEN) {
+ dev_err(re_chan->dev, "genq tx length %lu, max length %d\n",
+ len, FSL_RE_MAX_DATA_LEN);
+ return NULL;
+ }
+
+ desc = fsl_re_chan_alloc_desc(re_chan, flags);
+ if (desc <= 0)
+ return NULL;
+
+ if (scf && (flags & DMA_PREP_CONTINUE)) {
+ cont_q = 1;
+ src_cnt += 1;
+ }
+
+ /* Filling xor CDB */
+ cdb = FSL_RE_XOR_OPCODE << FSL_RE_CDB_OPCODE_SHIFT;
+ cdb |= (src_cnt - 1) << FSL_RE_CDB_NRCS_SHIFT;
+ cdb |= FSL_RE_BLOCK_SIZE << FSL_RE_CDB_BLKSIZE_SHIFT;
+ cdb |= FSL_RE_INTR_ON_ERROR << FSL_RE_CDB_ERROR_SHIFT;
+ cdb |= FSL_RE_DATA_DEP << FSL_RE_CDB_DEPEND_SHIFT;
+ xor = desc->cdb_addr;
+ xor->cdb32 = cdb;
+
+ if (scf) {
+ /* compute q = src0*coef0^src1*coef1^..., * is GF(8) mult */
+ for (i = 0; i < save_src_cnt; i++)
+ xor->gfm[i] = scf[i];
+ if (cont_q)
+ xor->gfm[i++] = 1;
+ } else {
+ /* compute P, that is XOR all srcs */
+ for (i = 0; i < src_cnt; i++)
+ xor->gfm[i] = 1;
+ }
+
+ /* Filling frame 0 of compound frame descriptor with CDB */
+ cf = desc->cf_addr;
+ fill_cfd_frame(cf, 0, sizeof(*xor), desc->cdb_paddr, 0);
+
+ /* Fill CFD's 1st frame with dest buffer */
+ fill_cfd_frame(cf, 1, len, dest, 0);
+
+ /* Fill CFD's rest of the frames with source buffers */
+ for (i = 2, j = 0; j < save_src_cnt; i++, j++)
+ fill_cfd_frame(cf, i, len, src[j], 0);
+
+ if (cont_q)
+ fill_cfd_frame(cf, i++, len, dest, 0);
+
+ /* Setting the final bit in the last source buffer frame in CFD */
+ cf[i - 1].efrl32 |= 1 << FSL_RE_CF_FINAL_SHIFT;
+
+ return &desc->async_tx;
+}
+
+/*
+ * Prep function for P parity calculation.In RAID Engine terminology,
+ * XOR calculation is called GenQ calculation done through GenQ command
+ */
+static struct dma_async_tx_descriptor *fsl_re_prep_dma_xor(
+ struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
+ unsigned int src_cnt, size_t len, unsigned long flags)
+{
+ /* NULL let genq take all coef as 1 */
+ return fsl_re_prep_dma_genq(chan, dest, src, src_cnt, NULL, len, flags);
+}
+
+/*
+ * Prep function for P/Q parity calculation.In RAID Engine terminology,
+ * P/Q calculation is called GenQQ done through GenQQ command
+ */
+static struct dma_async_tx_descriptor *fsl_re_prep_dma_pq(
+ struct dma_chan *chan, dma_addr_t *dest, dma_addr_t *src,
+ unsigned int src_cnt, const unsigned char *scf, size_t len,
+ unsigned long flags)
+{
+ struct fsl_re_chan *re_chan;
+ struct fsl_re_desc *desc;
+ struct fsl_re_pq_cdb *pq;
+ struct fsl_re_cmpnd_frame *cf;
+ u32 cdb;
+ u8 *p;
+ int gfmq_len, i, j;
+ unsigned int save_src_cnt = src_cnt;
+
+ re_chan = container_of(chan, struct fsl_re_chan, chan);
+ if (len > FSL_RE_MAX_DATA_LEN) {
+ dev_err(re_chan->dev, "pq tx length is %lu, max length is %d\n",
+ len, FSL_RE_MAX_DATA_LEN);
+ return NULL;
+ }
+
+ /*
+ * RE requires at least 2 sources, if given only one source, we pass the
+ * second source same as the first one.
+ * With only one source, generating P is meaningless, only generate Q.
+ */
+ if (src_cnt == 1) {
+ struct dma_async_tx_descriptor *tx;
+ dma_addr_t dma_src[2];
+ unsigned char coef[2];
+
+ dma_src[0] = *src;
+ coef[0] = *scf;
+ dma_src[1] = *src;
+ coef[1] = 0;
+ tx = fsl_re_prep_dma_genq(chan, dest[1], dma_src, 2, coef, len,
+ flags);
+ if (tx)
+ desc = to_fsl_re_dma_desc(tx);
+
+ return tx;
+ }
+
+ /*
+ * During RAID6 array creation, Linux's MD layer gets P and Q
+ * calculated separately in two steps. But our RAID Engine has
+ * the capability to calculate both P and Q with a single command
+ * Hence to merge well with MD layer, we need to provide a hook
+ * here and call re_jq_prep_dma_genq() function
+ */
+
+ if (flags & DMA_PREP_PQ_DISABLE_P)
+ return fsl_re_prep_dma_genq(chan, dest[1], src, src_cnt,
+ scf, len, flags);
+
+ if (flags & DMA_PREP_CONTINUE)
+ src_cnt += 3;
+
+ desc = fsl_re_chan_alloc_desc(re_chan, flags);
+ if (desc <= 0)
+ return NULL;
+
+ /* Filling GenQQ CDB */
+ cdb = FSL_RE_PQ_OPCODE << FSL_RE_CDB_OPCODE_SHIFT;
+ cdb |= (src_cnt - 1) << FSL_RE_CDB_NRCS_SHIFT;
+ cdb |= FSL_RE_BLOCK_SIZE << FSL_RE_CDB_BLKSIZE_SHIFT;
+ cdb |= FSL_RE_BUFFER_OUTPUT << FSL_RE_CDB_BUFFER_SHIFT;
+ cdb |= FSL_RE_DATA_DEP << FSL_RE_CDB_DEPEND_SHIFT;
+
+ pq = desc->cdb_addr;
+ pq->cdb32 = cdb;
+
+ p = pq->gfm_q1;
+ /* Init gfm_q1[] */
+ for (i = 0; i < src_cnt; i++)
+ p[i] = 1;
+
+ /* Align gfm[] to 32bit */
+ gfmq_len = ALIGN(src_cnt, 4);
+
+ /* Init gfm_q2[] */
+ p += gfmq_len;
+ for (i = 0; i < src_cnt; i++)
+ p[i] = scf[i];
+
+ /* Filling frame 0 of compound frame descriptor with CDB */
+ cf = desc->cf_addr;
+ fill_cfd_frame(cf, 0, sizeof(struct fsl_re_pq_cdb), desc->cdb_paddr, 0);
+
+ /* Fill CFD's 1st & 2nd frame with dest buffers */
+ for (i = 1, j = 0; i < 3; i++, j++)
+ fill_cfd_frame(cf, i, len, dest[j], 0);
+
+ /* Fill CFD's rest of the frames with source buffers */
+ for (i = 3, j = 0; j < save_src_cnt; i++, j++)
+ fill_cfd_frame(cf, i, len, src[j], 0);
+
+ /* PQ computation continuation */
+ if (flags & DMA_PREP_CONTINUE) {
+ if (src_cnt - save_src_cnt == 3) {
+ p[save_src_cnt] = 0;
+ p[save_src_cnt + 1] = 0;
+ p[save_src_cnt + 2] = 1;
+ fill_cfd_frame(cf, i++, len, dest[0], 0);
+ fill_cfd_frame(cf, i++, len, dest[1], 0);
+ fill_cfd_frame(cf, i++, len, dest[1], 0);
+ } else {
+ dev_err(re_chan->dev, "PQ tx continuation error!\n");
+ return NULL;
+ }
+ }
+
+ /* Setting the final bit in the last source buffer frame in CFD */
+ cf[i - 1].efrl32 |= 1 << FSL_RE_CF_FINAL_SHIFT;
+
+ return &desc->async_tx;
+}
+
+/*
+ * Prep function for memcpy. In RAID Engine, memcpy is done through MOVE
+ * command. Logic of this function will need to be modified once multipage
+ * support is added in Linux's MD/ASYNC Layer
+ */
+static struct dma_async_tx_descriptor *fsl_re_prep_dma_memcpy(
+ struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
+ size_t len, unsigned long flags)
+{
+ struct fsl_re_chan *re_chan;
+ struct fsl_re_desc *desc;
+ size_t length;
+ struct fsl_re_cmpnd_frame *cf;
+ struct fsl_re_move_cdb *move;
+ u32 cdb;
+
+ re_chan = container_of(chan, struct fsl_re_chan, chan);
+
+ if (len > FSL_RE_MAX_DATA_LEN) {
+ dev_err(re_chan->dev, "cp tx length is %lu, max length is %d\n",
+ len, FSL_RE_MAX_DATA_LEN);
+ return NULL;
+ }
+
+ desc = fsl_re_chan_alloc_desc(re_chan, flags);
+ if (desc <= 0)
+ return NULL;
+
+ /* Filling move CDB */
+ cdb = FSL_RE_MOVE_OPCODE << FSL_RE_CDB_OPCODE_SHIFT;
+ cdb |= FSL_RE_BLOCK_SIZE << FSL_RE_CDB_BLKSIZE_SHIFT;
+ cdb |= FSL_RE_INTR_ON_ERROR << FSL_RE_CDB_ERROR_SHIFT;
+ cdb |= FSL_RE_DATA_DEP << FSL_RE_CDB_DEPEND_SHIFT;
+
+ move = desc->cdb_addr;
+ move->cdb32 = cdb;
+
+ /* Filling frame 0 of CFD with move CDB */
+ cf = desc->cf_addr;
+ fill_cfd_frame(cf, 0, sizeof(*move), desc->cdb_paddr, 0);
+
+ length = min_t(size_t, len, FSL_RE_MAX_DATA_LEN);
+
+ /* Fill CFD's 1st frame with dest buffer */
+ fill_cfd_frame(cf, 1, length, dest, 0);
+
+ /* Fill CFD's 2nd frame with src buffer */
+ fill_cfd_frame(cf, 2, length, src, 1);
+
+ return &desc->async_tx;
+}
+
+static int fsl_re_alloc_chan_resources(struct dma_chan *chan)
+{
+ struct fsl_re_chan *re_chan;
+ struct fsl_re_desc *desc;
+ void *cf;
+ dma_addr_t paddr;
+ int i;
+
+ re_chan = container_of(chan, struct fsl_re_chan, chan);
+ for (i = 0; i < FSL_RE_MIN_DESCS; i++) {
+ desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+ if (!desc)
+ break;
+
+ cf = dma_pool_alloc(re_chan->re_dev->cf_desc_pool, GFP_KERNEL,
+ &paddr);
+ if (!cf) {
+ kfree(desc);
+ break;
+ }
+
+ INIT_LIST_HEAD(&desc->node);
+ fsl_re_init_desc(re_chan, desc, cf, paddr);
+
+ list_add_tail(&desc->node, &re_chan->free_q);
+ re_chan->alloc_count++;
+ }
+ return re_chan->alloc_count;
+}
+
+static void fsl_re_free_chan_resources(struct dma_chan *chan)
+{
+ struct fsl_re_chan *re_chan;
+ struct fsl_re_desc *desc;
+
+ re_chan = container_of(chan, struct fsl_re_chan, chan);
+ while (re_chan->alloc_count--) {
+ desc = list_first_entry(&re_chan->free_q,
+ struct fsl_re_desc,
+ node);
+
+ list_del(&desc->node);
+ dma_pool_free(re_chan->re_dev->cf_desc_pool, desc->cf_addr,
+ desc->cf_paddr);
+ kfree(desc);
+ }
+
+ if (!list_empty(&re_chan->free_q))
+ dev_err(re_chan->dev, "chan resource cannot be cleaned!\n");
+}
+
+static int fsl_re_chan_probe(struct platform_device *ofdev,
+ struct device_node *np, u8 q, u32 off)
+{
+ struct device *dev, *chandev;
+ struct fsl_re_drv_private *re_priv;
+ struct fsl_re_chan *chan;
+ struct dma_device *dma_dev;
+ u32 ptr;
+ u32 status;
+ int ret = 0, rc;
+ struct platform_device *chan_ofdev;
+
+ dev = &ofdev->dev;
+ re_priv = dev_get_drvdata(dev);
+ dma_dev = &re_priv->dma_dev;
+
+ chan = devm_kzalloc(dev, sizeof(*chan), GFP_KERNEL);
+ if (!chan)
+ return -ENOMEM;
+
+ /* create platform device for chan node */
+ chan_ofdev = of_platform_device_create(np, NULL, dev);
+ if (!chan_ofdev) {
+ dev_err(dev, "Not able to create ofdev for jr %d\n", q);
+ ret = -EINVAL;
+ goto err_free;
+ }
+
+ /* read reg property from dts */
+ rc = of_property_read_u32(np, "reg", &ptr);
+ if (rc) {
+ dev_err(dev, "Reg property not found in jr %d\n", q);
+ ret = -ENODEV;
+ goto err_free;
+ }
+
+ chan->jrregs = (struct fsl_re_chan_cfg *)((u8 *)re_priv->re_regs +
+ off + ptr);
+
+ /* read irq property from dts */
+ chan->irq = irq_of_parse_and_map(np, 0);
+ if (chan->irq == NO_IRQ) {
+ dev_err(dev, "No IRQ defined for JR %d\n", q);
+ ret = -ENODEV;
+ goto err_free;
+ }
+
+ snprintf(chan->name, sizeof(chan->name), "re_jr%02d", q);
+
+ chandev = &chan_ofdev->dev;
+ tasklet_init(&chan->irqtask, fsl_re_dequeue, (unsigned long)chandev);
+
+ ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chandev);
+ if (ret) {
+ dev_err(dev, "Unable to register interrupt for JR %d\n", q);
+ ret = -EINVAL;
+ goto err_free;
+ }
+
+ re_priv->re_jrs[q] = chan;
+ chan->chan.device = dma_dev;
+ chan->chan.private = chan;
+ chan->dev = chandev;
+ chan->re_dev = re_priv;
+
+ spin_lock_init(&chan->desc_lock);
+ INIT_LIST_HEAD(&chan->ack_q);
+ INIT_LIST_HEAD(&chan->active_q);
+ INIT_LIST_HEAD(&chan->submit_q);
+ INIT_LIST_HEAD(&chan->free_q);
+
+ chan->inb_ring_virt_addr = dma_pool_alloc(chan->re_dev->hw_desc_pool,
+ GFP_KERNEL, &chan->inb_phys_addr);
+ if (!chan->inb_ring_virt_addr) {
+ dev_err(dev, "No dma memory for inb_ring_virt_addr\n");
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
+ chan->oub_ring_virt_addr = dma_pool_alloc(chan->re_dev->hw_desc_pool,
+ GFP_KERNEL, &chan->oub_phys_addr);
+ if (!chan->oub_ring_virt_addr) {
+ dev_err(dev, "No dma memory for oub_ring_virt_addr\n");
+ ret = -ENOMEM;
+ goto err_free_1;
+ }
+
+ /* Program the Inbound/Outbound ring base addresses and size */
+ out_be32(&chan->jrregs->inbring_base_h,
+ chan->inb_phys_addr & FSL_RE_ADDR_BIT_MASK);
+ out_be32(&chan->jrregs->oubring_base_h,
+ chan->oub_phys_addr & FSL_RE_ADDR_BIT_MASK);
+ out_be32(&chan->jrregs->inbring_base_l,
+ chan->inb_phys_addr >> FSL_RE_ADDR_BIT_SHIFT);
+ out_be32(&chan->jrregs->oubring_base_l,
+ chan->oub_phys_addr >> FSL_RE_ADDR_BIT_SHIFT);
+ out_be32(&chan->jrregs->inbring_size,
+ FSL_RE_RING_SIZE << FSL_RE_RING_SIZE_SHIFT);
+ out_be32(&chan->jrregs->oubring_size,
+ FSL_RE_RING_SIZE << FSL_RE_RING_SIZE_SHIFT);
+
+ /* Read LIODN value from u-boot */
+ status = in_be32(&chan->jrregs->jr_config_1) & FSL_RE_REG_LIODN_MASK;
+
+ /* Program the CFG reg */
+ out_be32(&chan->jrregs->jr_config_1,
+ FSL_RE_CFG1_CBSI | FSL_RE_CFG1_CBS0 | status);
+
+ dev_set_drvdata(chandev, chan);
+
+ /* Enable RE/CHAN */
+ out_be32(&chan->jrregs->jr_command, FSL_RE_ENABLE);
+
+ return 0;
+
+err_free_1:
+ dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
+ chan->inb_phys_addr);
+err_free:
+ return ret;
+}
+
+/* Probe function for RAID Engine */
+static int fsl_re_probe(struct platform_device *ofdev)
+{
+ struct fsl_re_drv_private *re_priv;
+ struct device_node *np;
+ struct device_node *child;
+ u32 off;
+ u8 ridx = 0;
+ struct dma_device *dma_dev;
+ struct resource *res;
+ int rc;
+ struct device *dev = &ofdev->dev;
+
+ re_priv = devm_kzalloc(dev, sizeof(*re_priv), GFP_KERNEL);
+ if (!re_priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ /* IOMAP the entire RAID Engine region */
+ re_priv->re_regs = devm_ioremap(dev, res->start, resource_size(res));
+ if (!re_priv->re_regs)
+ return -EBUSY;
+
+ /* Program the RE mode */
+ out_be32(&re_priv->re_regs->global_config, FSL_RE_NON_DPAA_MODE);
+
+ /* Program Galois Field polynomial */
+ out_be32(&re_priv->re_regs->galois_field_config, FSL_RE_GFM_POLY);
+
+ dev_info(dev, "version %x, mode %x, gfp %x\n",
+ in_be32(&re_priv->re_regs->re_version_id),
+ in_be32(&re_priv->re_regs->global_config),
+ in_be32(&re_priv->re_regs->galois_field_config));
+
+ dma_dev = &re_priv->dma_dev;
+ dma_dev->dev = dev;
+ INIT_LIST_HEAD(&dma_dev->channels);
+ dma_set_mask(dev, DMA_BIT_MASK(40));
+
+ dma_dev->device_alloc_chan_resources = fsl_re_alloc_chan_resources;
+ dma_dev->device_tx_status = fsl_re_tx_status;
+ dma_dev->device_issue_pending = fsl_re_issue_pending;
+
+ dma_dev->max_xor = FSL_RE_MAX_XOR_SRCS;
+ dma_dev->device_prep_dma_xor = fsl_re_prep_dma_xor;
+ dma_cap_set(DMA_XOR, dma_dev->cap_mask);
+
+ dma_dev->max_pq = FSL_RE_MAX_PQ_SRCS;
+ dma_dev->device_prep_dma_pq = fsl_re_prep_dma_pq;
+ dma_cap_set(DMA_PQ, dma_dev->cap_mask);
+
+ dma_dev->device_prep_dma_memcpy = fsl_re_prep_dma_memcpy;
+ dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
+
+ dma_dev->device_free_chan_resources = fsl_re_free_chan_resources;
+
+ re_priv->total_chans = 0;
+
+ re_priv->cf_desc_pool = dmam_pool_create("fsl_re_cf_desc_pool", dev,
+ FSL_RE_CF_CDB_SIZE,
+ FSL_RE_CF_CDB_ALIGN, 0);
+
+ if (!re_priv->cf_desc_pool) {
+ dev_err(dev, "No memory for fsl re_cf desc pool\n");
+ return -ENOMEM;
+ }
+
+ re_priv->hw_desc_pool = dmam_pool_create("fsl_re_hw_desc_pool", dev,
+ sizeof(struct fsl_re_hw_desc) * FSL_RE_RING_SIZE,
+ FSL_RE_FRAME_ALIGN, 0);
+ if (!re_priv->hw_desc_pool) {
+ dev_err(dev, "No memory for fsl re_hw desc pool\n");
+ return -ENOMEM;
+ }
+
+ dev_set_drvdata(dev, re_priv);
+
+ /* Parse Device tree to find out the total number of JQs present */
+ for_each_compatible_node(np, NULL, "fsl,raideng-v1.0-job-queue") {
+ rc = of_property_read_u32(np, "reg", &off);
+ if (rc) {
+ dev_err(dev, "Reg property not found in JQ node\n");
+ return -ENODEV;
+ }
+ /* Find out the Job Rings present under each JQ */
+ for_each_child_of_node(np, child) {
+ rc = of_device_is_compatible(child,
+ "fsl,raideng-v1.0-job-ring");
+ if (rc) {
+ fsl_re_chan_probe(ofdev, child, ridx++, off);
+ re_priv->total_chans++;
+ }
+ }
+ }
+
+ dma_async_device_register(dma_dev);
+
+ return 0;
+}
+
+static void fsl_re_remove_chan(struct fsl_re_chan *chan)
+{
+ dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
+ chan->inb_phys_addr);
+
+ dma_pool_free(chan->re_dev->hw_desc_pool, chan->oub_ring_virt_addr,
+ chan->oub_phys_addr);
+}
+
+static int fsl_re_remove(struct platform_device *ofdev)
+{
+ struct fsl_re_drv_private *re_priv;
+ struct device *dev;
+ int i;
+
+ dev = &ofdev->dev;
+ re_priv = dev_get_drvdata(dev);
+
+ /* Cleanup chan related memory areas */
+ for (i = 0; i < re_priv->total_chans; i++)
+ fsl_re_remove_chan(re_priv->re_jrs[i]);
+
+ /* Unregister the driver */
+ dma_async_device_unregister(&re_priv->dma_dev);
+
+ return 0;
+}
+
+static struct of_device_id fsl_re_ids[] = {
+ { .compatible = "fsl,raideng-v1.0", },
+ {}
+};
+
+static struct platform_driver fsl_re_driver = {
+ .driver = {
+ .name = "fsl-raideng",
+ .owner = THIS_MODULE,
+ .of_match_table = fsl_re_ids,
+ },
+ .probe = fsl_re_probe,
+ .remove = fsl_re_remove,
+};
+
+module_platform_driver(fsl_re_driver);
+
+MODULE_AUTHOR("Harninder Rai <harninder.rai@freescale.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Freescale RAID Engine Device Driver");
--- /dev/null
+/*
+ * drivers/dma/fsl_raid.h
+ *
+ * Freescale RAID Engine device driver
+ *
+ * Author:
+ * Harninder Rai <harninder.rai@freescale.com>
+ * Naveen Burmi <naveenburmi@freescale.com>
+ *
+ * Rewrite:
+ * Xuelin Shi <xuelin.shi@freescale.com>
+
+ * Copyright (c) 2010-2012 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Freescale Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define FSL_RE_MAX_CHANS 4
+#define FSL_RE_DPAA_MODE BIT(30)
+#define FSL_RE_NON_DPAA_MODE BIT(31)
+#define FSL_RE_GFM_POLY 0x1d000000
+#define FSL_RE_ADD_JOB(x) ((x) << 16)
+#define FSL_RE_RMVD_JOB(x) ((x) << 16)
+#define FSL_RE_CFG1_CBSI 0x08000000
+#define FSL_RE_CFG1_CBS0 0x00080000
+#define FSL_RE_SLOT_FULL_SHIFT 8
+#define FSL_RE_SLOT_FULL(x) ((x) >> FSL_RE_SLOT_FULL_SHIFT)
+#define FSL_RE_SLOT_AVAIL_SHIFT 8
+#define FSL_RE_SLOT_AVAIL(x) ((x) >> FSL_RE_SLOT_AVAIL_SHIFT)
+#define FSL_RE_PQ_OPCODE 0x1B
+#define FSL_RE_XOR_OPCODE 0x1A
+#define FSL_RE_MOVE_OPCODE 0x8
+#define FSL_RE_FRAME_ALIGN 16
+#define FSL_RE_BLOCK_SIZE 0x3 /* 4096 bytes */
+#define FSL_RE_CACHEABLE_IO 0x0
+#define FSL_RE_BUFFER_OUTPUT 0x0
+#define FSL_RE_INTR_ON_ERROR 0x1
+#define FSL_RE_DATA_DEP 0x1
+#define FSL_RE_ENABLE_DPI 0x0
+#define FSL_RE_RING_SIZE 0x400
+#define FSL_RE_RING_SIZE_MASK (FSL_RE_RING_SIZE - 1)
+#define FSL_RE_RING_SIZE_SHIFT 8
+#define FSL_RE_ADDR_BIT_SHIFT 4
+#define FSL_RE_ADDR_BIT_MASK (BIT(FSL_RE_ADDR_BIT_SHIFT) - 1)
+#define FSL_RE_ERROR 0x40000000
+#define FSL_RE_INTR 0x80000000
+#define FSL_RE_CLR_INTR 0x80000000
+#define FSL_RE_PAUSE 0x80000000
+#define FSL_RE_ENABLE 0x80000000
+#define FSL_RE_REG_LIODN_MASK 0x00000FFF
+
+#define FSL_RE_CDB_OPCODE_MASK 0xF8000000
+#define FSL_RE_CDB_OPCODE_SHIFT 27
+#define FSL_RE_CDB_EXCLEN_MASK 0x03000000
+#define FSL_RE_CDB_EXCLEN_SHIFT 24
+#define FSL_RE_CDB_EXCLQ1_MASK 0x00F00000
+#define FSL_RE_CDB_EXCLQ1_SHIFT 20
+#define FSL_RE_CDB_EXCLQ2_MASK 0x000F0000
+#define FSL_RE_CDB_EXCLQ2_SHIFT 16
+#define FSL_RE_CDB_BLKSIZE_MASK 0x0000C000
+#define FSL_RE_CDB_BLKSIZE_SHIFT 14
+#define FSL_RE_CDB_CACHE_MASK 0x00003000
+#define FSL_RE_CDB_CACHE_SHIFT 12
+#define FSL_RE_CDB_BUFFER_MASK 0x00000800
+#define FSL_RE_CDB_BUFFER_SHIFT 11
+#define FSL_RE_CDB_ERROR_MASK 0x00000400
+#define FSL_RE_CDB_ERROR_SHIFT 10
+#define FSL_RE_CDB_NRCS_MASK 0x0000003C
+#define FSL_RE_CDB_NRCS_SHIFT 6
+#define FSL_RE_CDB_DEPEND_MASK 0x00000008
+#define FSL_RE_CDB_DEPEND_SHIFT 3
+#define FSL_RE_CDB_DPI_MASK 0x00000004
+#define FSL_RE_CDB_DPI_SHIFT 2
+
+/*
+ * the largest cf block is 19*sizeof(struct cmpnd_frame), which is 304 bytes.
+ * here 19 = 1(cdb)+2(dest)+16(src), align to 64bytes, that is 320 bytes.
+ * the largest cdb block: struct pq_cdb which is 180 bytes, adding to cf block
+ * 320+180=500, align to 64bytes, that is 512 bytes.
+ */
+#define FSL_RE_CF_DESC_SIZE 320
+#define FSL_RE_CF_CDB_SIZE 512
+#define FSL_RE_CF_CDB_ALIGN 64
+
+struct fsl_re_ctrl {
+ /* General Configuration Registers */
+ __be32 global_config; /* Global Configuration Register */
+ u8 rsvd1[4];
+ __be32 galois_field_config; /* Galois Field Configuration Register */
+ u8 rsvd2[4];
+ __be32 jq_wrr_config; /* WRR Configuration register */
+ u8 rsvd3[4];
+ __be32 crc_config; /* CRC Configuration register */
+ u8 rsvd4[228];
+ __be32 system_reset; /* System Reset Register */
+ u8 rsvd5[252];
+ __be32 global_status; /* Global Status Register */
+ u8 rsvd6[832];
+ __be32 re_liodn_base; /* LIODN Base Register */
+ u8 rsvd7[1712];
+ __be32 re_version_id; /* Version ID register of RE */
+ __be32 re_version_id_2; /* Version ID 2 register of RE */
+ u8 rsvd8[512];
+ __be32 host_config; /* Host I/F Configuration Register */
+};
+
+struct fsl_re_chan_cfg {
+ /* Registers for JR interface */
+ __be32 jr_config_0; /* Job Queue Configuration 0 Register */
+ __be32 jr_config_1; /* Job Queue Configuration 1 Register */
+ __be32 jr_interrupt_status; /* Job Queue Interrupt Status Register */
+ u8 rsvd1[4];
+ __be32 jr_command; /* Job Queue Command Register */
+ u8 rsvd2[4];
+ __be32 jr_status; /* Job Queue Status Register */
+ u8 rsvd3[228];
+
+ /* Input Ring */
+ __be32 inbring_base_h; /* Inbound Ring Base Address Register - High */
+ __be32 inbring_base_l; /* Inbound Ring Base Address Register - Low */
+ __be32 inbring_size; /* Inbound Ring Size Register */
+ u8 rsvd4[4];
+ __be32 inbring_slot_avail; /* Inbound Ring Slot Available Register */
+ u8 rsvd5[4];
+ __be32 inbring_add_job; /* Inbound Ring Add Job Register */
+ u8 rsvd6[4];
+ __be32 inbring_cnsmr_indx; /* Inbound Ring Consumer Index Register */
+ u8 rsvd7[220];
+
+ /* Output Ring */
+ __be32 oubring_base_h; /* Outbound Ring Base Address Register - High */
+ __be32 oubring_base_l; /* Outbound Ring Base Address Register - Low */
+ __be32 oubring_size; /* Outbound Ring Size Register */
+ u8 rsvd8[4];
+ __be32 oubring_job_rmvd; /* Outbound Ring Job Removed Register */
+ u8 rsvd9[4];
+ __be32 oubring_slot_full; /* Outbound Ring Slot Full Register */
+ u8 rsvd10[4];
+ __be32 oubring_prdcr_indx; /* Outbound Ring Producer Index */
+};
+
+/*
+ * Command Descriptor Block (CDB) for unicast move command.
+ * In RAID Engine terms, memcpy is done through move command
+ */
+struct fsl_re_move_cdb {
+ __be32 cdb32;
+};
+
+/* Data protection/integrity related fields */
+#define FSL_RE_DPI_APPS_MASK 0xC0000000
+#define FSL_RE_DPI_APPS_SHIFT 30
+#define FSL_RE_DPI_REF_MASK 0x30000000
+#define FSL_RE_DPI_REF_SHIFT 28
+#define FSL_RE_DPI_GUARD_MASK 0x0C000000
+#define FSL_RE_DPI_GUARD_SHIFT 26
+#define FSL_RE_DPI_ATTR_MASK 0x03000000
+#define FSL_RE_DPI_ATTR_SHIFT 24
+#define FSL_RE_DPI_META_MASK 0x0000FFFF
+
+struct fsl_re_dpi {
+ __be32 dpi32;
+ __be32 ref;
+};
+
+/*
+ * CDB for GenQ command. In RAID Engine terminology, XOR is
+ * done through this command
+ */
+struct fsl_re_xor_cdb {
+ __be32 cdb32;
+ u8 gfm[16];
+ struct fsl_re_dpi dpi_dest_spec;
+ struct fsl_re_dpi dpi_src_spec[16];
+};
+
+/* CDB for no-op command */
+struct fsl_re_noop_cdb {
+ __be32 cdb32;
+};
+
+/*
+ * CDB for GenQQ command. In RAID Engine terminology, P/Q is
+ * done through this command
+ */
+struct fsl_re_pq_cdb {
+ __be32 cdb32;
+ u8 gfm_q1[16];
+ u8 gfm_q2[16];
+ struct fsl_re_dpi dpi_dest_spec[2];
+ struct fsl_re_dpi dpi_src_spec[16];
+};
+
+/* Compound frame */
+#define FSL_RE_CF_ADDR_HIGH_MASK 0x000000FF
+#define FSL_RE_CF_EXT_MASK 0x80000000
+#define FSL_RE_CF_EXT_SHIFT 31
+#define FSL_RE_CF_FINAL_MASK 0x40000000
+#define FSL_RE_CF_FINAL_SHIFT 30
+#define FSL_RE_CF_LENGTH_MASK 0x000FFFFF
+#define FSL_RE_CF_BPID_MASK 0x00FF0000
+#define FSL_RE_CF_BPID_SHIFT 16
+#define FSL_RE_CF_OFFSET_MASK 0x00001FFF
+
+struct fsl_re_cmpnd_frame {
+ __be32 addr_high;
+ __be32 addr_low;
+ __be32 efrl32;
+ __be32 rbro32;
+};
+
+/* Frame descriptor */
+#define FSL_RE_HWDESC_LIODN_MASK 0x3F000000
+#define FSL_RE_HWDESC_LIODN_SHIFT 24
+#define FSL_RE_HWDESC_BPID_MASK 0x00FF0000
+#define FSL_RE_HWDESC_BPID_SHIFT 16
+#define FSL_RE_HWDESC_ELIODN_MASK 0x0000F000
+#define FSL_RE_HWDESC_ELIODN_SHIFT 12
+#define FSL_RE_HWDESC_FMT_SHIFT 29
+#define FSL_RE_HWDESC_FMT_MASK (0x3 << FSL_RE_HWDESC_FMT_SHIFT)
+
+struct fsl_re_hw_desc {
+ __be32 lbea32;
+ __be32 addr_low;
+ __be32 fmt32;
+ __be32 status;
+};
+
+/* Raid Engine device private data */
+struct fsl_re_drv_private {
+ u8 total_chans;
+ struct dma_device dma_dev;
+ struct fsl_re_ctrl *re_regs;
+ struct fsl_re_chan *re_jrs[FSL_RE_MAX_CHANS];
+ struct dma_pool *cf_desc_pool;
+ struct dma_pool *hw_desc_pool;
+};
+
+/* Per job ring data structure */
+struct fsl_re_chan {
+ char name[16];
+ spinlock_t desc_lock; /* queue lock */
+ struct list_head ack_q; /* wait to acked queue */
+ struct list_head active_q; /* already issued on hw, not completed */
+ struct list_head submit_q;
+ struct list_head free_q; /* alloc available queue */
+ struct device *dev;
+ struct fsl_re_drv_private *re_dev;
+ struct dma_chan chan;
+ struct fsl_re_chan_cfg *jrregs;
+ int irq;
+ struct tasklet_struct irqtask;
+ u32 alloc_count;
+
+ /* hw descriptor ring for inbound queue*/
+ dma_addr_t inb_phys_addr;
+ struct fsl_re_hw_desc *inb_ring_virt_addr;
+ u32 inb_count;
+
+ /* hw descriptor ring for outbound queue */
+ dma_addr_t oub_phys_addr;
+ struct fsl_re_hw_desc *oub_ring_virt_addr;
+ u32 oub_count;
+};
+
+/* Async transaction descriptor */
+struct fsl_re_desc {
+ struct dma_async_tx_descriptor async_tx;
+ struct list_head node;
+ struct fsl_re_hw_desc hwdesc;
+ struct fsl_re_chan *re_chan;
+
+ /* hwdesc will point to cf_addr */
+ void *cf_addr;
+ dma_addr_t cf_paddr;
+
+ void *cdb_addr;
+ dma_addr_t cdb_paddr;
+ int status;
+};
return 0;
}
-static int mdc_alloc_chan_resources(struct dma_chan *chan)
-{
- return 0;
-}
-
static void mdc_free_chan_resources(struct dma_chan *chan)
{
struct mdc_chan *mchan = to_mdc_chan(chan);
mdma->dma_dev.device_prep_slave_sg = mdc_prep_slave_sg;
mdma->dma_dev.device_prep_dma_cyclic = mdc_prep_dma_cyclic;
mdma->dma_dev.device_prep_dma_memcpy = mdc_prep_dma_memcpy;
- mdma->dma_dev.device_alloc_chan_resources = mdc_alloc_chan_resources;
mdma->dma_dev.device_free_chan_resources = mdc_free_chan_resources;
mdma->dma_dev.device_tx_status = mdc_tx_status;
mdma->dma_dev.device_issue_pending = mdc_issue_pending;
#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34
#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38
+#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 41
static void sdma_add_scripts(struct sdma_engine *sdma,
const struct sdma_script_start_addrs *addr)
case 2:
sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2;
break;
+ case 3:
+ sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3;
+ break;
default:
dev_err(sdma->dev, "unknown firmware version\n");
goto err_firmware;
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
*/
/*
}
}
-static int k3_dma_alloc_chan_resources(struct dma_chan *chan)
-{
- return 0;
-}
-
static void k3_dma_free_chan_resources(struct dma_chan *chan)
{
struct k3_dma_chan *c = to_k3_chan(chan);
kfree(ds);
}
-static struct of_device_id k3_pdma_dt_ids[] = {
+static const struct of_device_id k3_pdma_dt_ids[] = {
{ .compatible = "hisilicon,k3-dma-1.0", },
{}
};
dma_cap_set(DMA_SLAVE, d->slave.cap_mask);
dma_cap_set(DMA_MEMCPY, d->slave.cap_mask);
d->slave.dev = &op->dev;
- d->slave.device_alloc_chan_resources = k3_dma_alloc_chan_resources;
d->slave.device_free_chan_resources = k3_dma_free_chan_resources;
d->slave.device_tx_status = k3_dma_tx_status;
d->slave.device_prep_dma_memcpy = k3_dma_prep_memcpy;
return 0;
}
-static struct of_device_id mmp_pdma_dt_ids[] = {
+static const struct of_device_id mmp_pdma_dt_ids[] = {
{ .compatible = "marvell,pdma-1.0", },
{}
};
return dma_request_channel(mask, mmp_tdma_filter_fn, ¶m);
}
-static struct of_device_id mmp_tdma_dt_ids[] = {
+static const struct of_device_id mmp_tdma_dt_ids[] = {
{ .compatible = "marvell,adma-1.0", .data = (void *)MMP_AUD_TDMA},
{ .compatible = "marvell,pxa910-squ", .data = (void *)PXA910_SQU},
{}
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
return 0;
}
-static struct of_device_id mpc_dma_match[] = {
+static const struct of_device_id mpc_dma_match[] = {
{ .compatible = "fsl,mpc5121-dma", },
{ .compatible = "fsl,mpc8308-dma", },
{},
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/init.h>
}
#ifdef CONFIG_OF
-static struct of_device_id mv_xor_dt_ids[] = {
+static const struct of_device_id mv_xor_dt_ids[] = {
{ .compatible = "marvell,orion-xor", },
{},
};
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MV_XOR_H
err_disable_pdev:
pci_disable_device(pdev);
err_free_mem:
+ kfree(pd);
return err;
}
buf[0] = CMD_DMAADDH;
buf[0] |= (da << 1);
- *((u16 *)&buf[1]) = val;
+ *((__le16 *)&buf[1]) = cpu_to_le16(val);
PL330_DBGCMD_DUMP(SZ_DMAADDH, "\tDMAADDH %s %u\n",
da == 1 ? "DA" : "SA", val);
buf[0] = CMD_DMAMOV;
buf[1] = dst;
- *((u32 *)&buf[2]) = val;
+ *((__le32 *)&buf[2]) = cpu_to_le32(val);
PL330_DBGCMD_DUMP(SZ_DMAMOV, "\tDMAMOV %s 0x%x\n",
dst == SAR ? "SAR" : (dst == DAR ? "DAR" : "CCR"), val);
buf[1] = chan & 0x7;
- *((u32 *)&buf[2]) = addr;
+ *((__le32 *)&buf[2]) = cpu_to_le32(addr);
return SZ_DMAGO;
}
}
writel(val, regs + DBGINST0);
- val = *((u32 *)&insn[2]);
+ val = le32_to_cpu(*((__le32 *)&insn[2]));
writel(val, regs + DBGINST1);
/* If timed out due to halted state-machine */
* DMA transfer again. This pause feature was implemented to
* allow safely read residue before channel termination.
*/
-int pl330_pause(struct dma_chan *chan)
+static int pl330_pause(struct dma_chan *chan)
{
struct dma_pl330_chan *pch = to_pchan(chan);
struct pl330_dmac *pl330 = pch->dmac;
pm_runtime_put_autosuspend(pch->dmac->ddma.dev);
}
-int pl330_get_current_xferred_count(struct dma_pl330_chan *pch,
- struct dma_pl330_desc *desc)
+static int pl330_get_current_xferred_count(struct dma_pl330_chan *pch,
+ struct dma_pl330_desc *desc)
{
struct pl330_thread *thrd = pch->thread;
struct pl330_dmac *pl330 = pch->dmac;
transferred = 0;
residual += desc->bytes_requested - transferred;
if (desc->txd.cookie == cookie) {
- ret = desc->status;
+ switch (desc->status) {
+ case DONE:
+ ret = DMA_COMPLETE;
+ break;
+ case PREP:
+ case BUSY:
+ ret = DMA_IN_PROGRESS;
+ break;
+ default:
+ WARN_ON(1);
+ }
break;
}
if (desc->last)
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
[BAM_P_FIFO_SIZES] = { 0x1820, 0x00, 0x1000, 0x00 },
};
+static const struct reg_offset_data bam_v1_7_reg_info[] = {
+ [BAM_CTRL] = { 0x00000, 0x00, 0x00, 0x00 },
+ [BAM_REVISION] = { 0x01000, 0x00, 0x00, 0x00 },
+ [BAM_NUM_PIPES] = { 0x01008, 0x00, 0x00, 0x00 },
+ [BAM_DESC_CNT_TRSHLD] = { 0x00008, 0x00, 0x00, 0x00 },
+ [BAM_IRQ_SRCS] = { 0x03010, 0x00, 0x00, 0x00 },
+ [BAM_IRQ_SRCS_MSK] = { 0x03014, 0x00, 0x00, 0x00 },
+ [BAM_IRQ_SRCS_UNMASKED] = { 0x03018, 0x00, 0x00, 0x00 },
+ [BAM_IRQ_STTS] = { 0x00014, 0x00, 0x00, 0x00 },
+ [BAM_IRQ_CLR] = { 0x00018, 0x00, 0x00, 0x00 },
+ [BAM_IRQ_EN] = { 0x0001C, 0x00, 0x00, 0x00 },
+ [BAM_CNFG_BITS] = { 0x0007C, 0x00, 0x00, 0x00 },
+ [BAM_IRQ_SRCS_EE] = { 0x03000, 0x00, 0x00, 0x1000 },
+ [BAM_IRQ_SRCS_MSK_EE] = { 0x03004, 0x00, 0x00, 0x1000 },
+ [BAM_P_CTRL] = { 0x13000, 0x1000, 0x00, 0x00 },
+ [BAM_P_RST] = { 0x13004, 0x1000, 0x00, 0x00 },
+ [BAM_P_HALT] = { 0x13008, 0x1000, 0x00, 0x00 },
+ [BAM_P_IRQ_STTS] = { 0x13010, 0x1000, 0x00, 0x00 },
+ [BAM_P_IRQ_CLR] = { 0x13014, 0x1000, 0x00, 0x00 },
+ [BAM_P_IRQ_EN] = { 0x13018, 0x1000, 0x00, 0x00 },
+ [BAM_P_EVNT_DEST_ADDR] = { 0x1382C, 0x00, 0x1000, 0x00 },
+ [BAM_P_EVNT_REG] = { 0x13818, 0x00, 0x1000, 0x00 },
+ [BAM_P_SW_OFSTS] = { 0x13800, 0x00, 0x1000, 0x00 },
+ [BAM_P_DATA_FIFO_ADDR] = { 0x13824, 0x00, 0x1000, 0x00 },
+ [BAM_P_DESC_FIFO_ADDR] = { 0x1381C, 0x00, 0x1000, 0x00 },
+ [BAM_P_EVNT_GEN_TRSHLD] = { 0x13828, 0x00, 0x1000, 0x00 },
+ [BAM_P_FIFO_SIZES] = { 0x13820, 0x00, 0x1000, 0x00 },
+};
+
/* BAM CTRL */
#define BAM_SW_RST BIT(0)
#define BAM_EN BIT(1)
static const struct of_device_id bam_of_match[] = {
{ .compatible = "qcom,bam-v1.3.0", .data = &bam_v1_3_reg_info },
{ .compatible = "qcom,bam-v1.4.0", .data = &bam_v1_4_reg_info },
+ { .compatible = "qcom,bam-v1.7.0", .data = &bam_v1_7_reg_info },
{}
};
if (!bdev->channels) {
ret = -ENOMEM;
- goto err_disable_clk;
+ goto err_tasklet_kill;
}
/* allocate and initialize channels */
ret = devm_request_irq(bdev->dev, bdev->irq, bam_dma_irq,
IRQF_TRIGGER_HIGH, "bam_dma", bdev);
if (ret)
- goto err_disable_clk;
+ goto err_bam_channel_exit;
/* set max dma segment size */
bdev->common.dev = bdev->dev;
ret = dma_set_max_seg_size(bdev->common.dev, BAM_MAX_DATA_SIZE);
if (ret) {
dev_err(bdev->dev, "cannot set maximum segment size\n");
- goto err_disable_clk;
+ goto err_bam_channel_exit;
}
platform_set_drvdata(pdev, bdev);
ret = dma_async_device_register(&bdev->common);
if (ret) {
dev_err(bdev->dev, "failed to register dma async device\n");
- goto err_disable_clk;
+ goto err_bam_channel_exit;
}
ret = of_dma_controller_register(pdev->dev.of_node, bam_dma_xlate,
err_unregister_dma:
dma_async_device_unregister(&bdev->common);
+err_bam_channel_exit:
+ for (i = 0; i < bdev->num_channels; i++)
+ tasklet_kill(&bdev->channels[i].vc.task);
+err_tasklet_kill:
+ tasklet_kill(&bdev->task);
err_disable_clk:
clk_disable_unprepare(bdev->bamclk);
+
return ret;
}
return ret;
}
-static int s3c24xx_dma_alloc_chan_resources(struct dma_chan *chan)
-{
- return 0;
-}
-
static void s3c24xx_dma_free_chan_resources(struct dma_chan *chan)
{
/* Ensure all queued descriptors are freed */
if (!s3cdma->phy_chans)
return -ENOMEM;
- /* aquire irqs and clocks for all physical channels */
+ /* acquire irqs and clocks for all physical channels */
for (i = 0; i < pdata->num_phy_channels; i++) {
struct s3c24xx_dma_phy *phy = &s3cdma->phy_chans[i];
char clk_name[6];
sprintf(clk_name, "dma.%d", i);
phy->clk = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(phy->clk) && sdata->has_clocks) {
- dev_err(&pdev->dev, "unable to aquire clock for channel %d, error %lu",
+ dev_err(&pdev->dev, "unable to acquire clock for channel %d, error %lu\n",
i, PTR_ERR(phy->clk));
continue;
}
dma_cap_set(DMA_MEMCPY, s3cdma->memcpy.cap_mask);
dma_cap_set(DMA_PRIVATE, s3cdma->memcpy.cap_mask);
s3cdma->memcpy.dev = &pdev->dev;
- s3cdma->memcpy.device_alloc_chan_resources =
- s3c24xx_dma_alloc_chan_resources;
s3cdma->memcpy.device_free_chan_resources =
s3c24xx_dma_free_chan_resources;
s3cdma->memcpy.device_prep_dma_memcpy = s3c24xx_dma_prep_memcpy;
dma_cap_set(DMA_CYCLIC, s3cdma->slave.cap_mask);
dma_cap_set(DMA_PRIVATE, s3cdma->slave.cap_mask);
s3cdma->slave.dev = &pdev->dev;
- s3cdma->slave.device_alloc_chan_resources =
- s3c24xx_dma_alloc_chan_resources;
s3cdma->slave.device_free_chan_resources =
s3c24xx_dma_free_chan_resources;
s3cdma->slave.device_tx_status = s3c24xx_dma_tx_status;
}
-static int sa11x0_dma_alloc_chan_resources(struct dma_chan *chan)
-{
- return 0;
-}
-
static void sa11x0_dma_free_chan_resources(struct dma_chan *chan)
{
struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan);
INIT_LIST_HEAD(&dmadev->channels);
dmadev->dev = dev;
- dmadev->device_alloc_chan_resources = sa11x0_dma_alloc_chan_resources;
dmadev->device_free_chan_resources = sa11x0_dma_free_chan_resources;
dmadev->device_config = sa11x0_dma_device_config;
dmadev->device_pause = sa11x0_dma_device_pause;
dma_cap_set(DMA_CYCLIC, d->slave.cap_mask);
d->slave.device_prep_slave_sg = sa11x0_dma_prep_slave_sg;
d->slave.device_prep_dma_cyclic = sa11x0_dma_prep_dma_cyclic;
+ d->slave.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ d->slave.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+ d->slave.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES);
+ d->slave.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES);
ret = sa11x0_dma_init_dmadev(&d->slave, &pdev->dev);
if (ret) {
dev_warn(d->slave.dev, "failed to register slave async device: %d\n",
help
Enable support for the Renesas R-Car series DMA controllers.
-config RCAR_AUDMAC_PP
- tristate "Renesas R-Car Audio DMAC Peripheral Peripheral support"
- depends on SH_DMAE_BASE
- help
- Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
-
config RCAR_DMAC
tristate "Renesas R-Car Gen2 DMA Controller"
depends on ARCH_SHMOBILE || COMPILE_TEST
help
This driver supports the general purpose DMA controller found in the
Renesas R-Car second generation SoCs.
+
+config RENESAS_USB_DMAC
+ tristate "Renesas USB-DMA Controller"
+ depends on ARCH_SHMOBILE || COMPILE_TEST
+ select RENESAS_DMA
+ select DMA_VIRTUAL_CHANNELS
+ help
+ This driver supports the USB-DMA controller found in the Renesas
+ SoCs.
obj-$(CONFIG_SUDMAC) += sudmac.o
obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
-obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o
obj-$(CONFIG_RCAR_DMAC) += rcar-dmac.o
+obj-$(CONFIG_RENESAS_USB_DMAC) += usb-dmac.o
+++ /dev/null
-/*
- * This is for Renesas R-Car Audio-DMAC-peri-peri.
- *
- * Copyright (C) 2014 Renesas Electronics Corporation
- * Copyright (C) 2014 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
- *
- * based on the drivers/dma/sh/shdma.c
- *
- * Copyright (C) 2011-2012 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
- * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
- * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved.
- * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/dmaengine.h>
-#include <linux/of_dma.h>
-#include <linux/platform_data/dma-rcar-audmapp.h>
-#include <linux/platform_device.h>
-#include <linux/shdma-base.h>
-
-/*
- * DMA register
- */
-#define PDMASAR 0x00
-#define PDMADAR 0x04
-#define PDMACHCR 0x0c
-
-/* PDMACHCR */
-#define PDMACHCR_DE (1 << 0)
-
-#define AUDMAPP_MAX_CHANNELS 29
-
-/* Default MEMCPY transfer size = 2^2 = 4 bytes */
-#define LOG2_DEFAULT_XFER_SIZE 2
-#define AUDMAPP_SLAVE_NUMBER 256
-#define AUDMAPP_LEN_MAX (16 * 1024 * 1024)
-
-struct audmapp_chan {
- struct shdma_chan shdma_chan;
- void __iomem *base;
- dma_addr_t slave_addr;
- u32 chcr;
-};
-
-struct audmapp_device {
- struct shdma_dev shdma_dev;
- struct audmapp_pdata *pdata;
- struct device *dev;
- void __iomem *chan_reg;
-};
-
-struct audmapp_desc {
- struct shdma_desc shdma_desc;
- dma_addr_t src;
- dma_addr_t dst;
-};
-
-#define to_shdma_chan(c) container_of(c, struct shdma_chan, dma_chan)
-
-#define to_chan(chan) container_of(chan, struct audmapp_chan, shdma_chan)
-#define to_desc(sdesc) container_of(sdesc, struct audmapp_desc, shdma_desc)
-#define to_dev(chan) container_of(chan->shdma_chan.dma_chan.device, \
- struct audmapp_device, shdma_dev.dma_dev)
-
-static void audmapp_write(struct audmapp_chan *auchan, u32 data, u32 reg)
-{
- struct audmapp_device *audev = to_dev(auchan);
- struct device *dev = audev->dev;
-
- dev_dbg(dev, "w %p : %08x\n", auchan->base + reg, data);
-
- iowrite32(data, auchan->base + reg);
-}
-
-static u32 audmapp_read(struct audmapp_chan *auchan, u32 reg)
-{
- return ioread32(auchan->base + reg);
-}
-
-static void audmapp_halt(struct shdma_chan *schan)
-{
- struct audmapp_chan *auchan = to_chan(schan);
- int i;
-
- audmapp_write(auchan, 0, PDMACHCR);
-
- for (i = 0; i < 1024; i++) {
- if (0 == audmapp_read(auchan, PDMACHCR))
- return;
- udelay(1);
- }
-}
-
-static void audmapp_start_xfer(struct shdma_chan *schan,
- struct shdma_desc *sdesc)
-{
- struct audmapp_chan *auchan = to_chan(schan);
- struct audmapp_device *audev = to_dev(auchan);
- struct audmapp_desc *desc = to_desc(sdesc);
- struct device *dev = audev->dev;
- u32 chcr = auchan->chcr | PDMACHCR_DE;
-
- dev_dbg(dev, "src/dst/chcr = %pad/%pad/%08x\n",
- &desc->src, &desc->dst, chcr);
-
- audmapp_write(auchan, desc->src, PDMASAR);
- audmapp_write(auchan, desc->dst, PDMADAR);
- audmapp_write(auchan, chcr, PDMACHCR);
-}
-
-static int audmapp_get_config(struct audmapp_chan *auchan, int slave_id,
- u32 *chcr, dma_addr_t *dst)
-{
- struct audmapp_device *audev = to_dev(auchan);
- struct audmapp_pdata *pdata = audev->pdata;
- struct audmapp_slave_config *cfg;
- int i;
-
- *chcr = 0;
- *dst = 0;
-
- if (!pdata) { /* DT */
- *chcr = ((u32)slave_id) << 16;
- auchan->shdma_chan.slave_id = (slave_id) >> 8;
- return 0;
- }
-
- /* non-DT */
-
- if (slave_id >= AUDMAPP_SLAVE_NUMBER)
- return -ENXIO;
-
- for (i = 0, cfg = pdata->slave; i < pdata->slave_num; i++, cfg++)
- if (cfg->slave_id == slave_id) {
- *chcr = cfg->chcr;
- *dst = cfg->dst;
- return 0;
- }
-
- return -ENXIO;
-}
-
-static int audmapp_set_slave(struct shdma_chan *schan, int slave_id,
- dma_addr_t slave_addr, bool try)
-{
- struct audmapp_chan *auchan = to_chan(schan);
- u32 chcr;
- dma_addr_t dst;
- int ret;
-
- ret = audmapp_get_config(auchan, slave_id, &chcr, &dst);
- if (ret < 0)
- return ret;
-
- if (try)
- return 0;
-
- auchan->chcr = chcr;
- auchan->slave_addr = slave_addr ? : dst;
-
- return 0;
-}
-
-static int audmapp_desc_setup(struct shdma_chan *schan,
- struct shdma_desc *sdesc,
- dma_addr_t src, dma_addr_t dst, size_t *len)
-{
- struct audmapp_desc *desc = to_desc(sdesc);
-
- if (*len > (size_t)AUDMAPP_LEN_MAX)
- *len = (size_t)AUDMAPP_LEN_MAX;
-
- desc->src = src;
- desc->dst = dst;
-
- return 0;
-}
-
-static void audmapp_setup_xfer(struct shdma_chan *schan,
- int slave_id)
-{
-}
-
-static dma_addr_t audmapp_slave_addr(struct shdma_chan *schan)
-{
- struct audmapp_chan *auchan = to_chan(schan);
-
- return auchan->slave_addr;
-}
-
-static bool audmapp_channel_busy(struct shdma_chan *schan)
-{
- struct audmapp_chan *auchan = to_chan(schan);
- u32 chcr = audmapp_read(auchan, PDMACHCR);
-
- return chcr & ~PDMACHCR_DE;
-}
-
-static bool audmapp_desc_completed(struct shdma_chan *schan,
- struct shdma_desc *sdesc)
-{
- return true;
-}
-
-static struct shdma_desc *audmapp_embedded_desc(void *buf, int i)
-{
- return &((struct audmapp_desc *)buf)[i].shdma_desc;
-}
-
-static const struct shdma_ops audmapp_shdma_ops = {
- .halt_channel = audmapp_halt,
- .desc_setup = audmapp_desc_setup,
- .set_slave = audmapp_set_slave,
- .start_xfer = audmapp_start_xfer,
- .embedded_desc = audmapp_embedded_desc,
- .setup_xfer = audmapp_setup_xfer,
- .slave_addr = audmapp_slave_addr,
- .channel_busy = audmapp_channel_busy,
- .desc_completed = audmapp_desc_completed,
-};
-
-static int audmapp_chan_probe(struct platform_device *pdev,
- struct audmapp_device *audev, int id)
-{
- struct shdma_dev *sdev = &audev->shdma_dev;
- struct audmapp_chan *auchan;
- struct shdma_chan *schan;
- struct device *dev = audev->dev;
-
- auchan = devm_kzalloc(dev, sizeof(*auchan), GFP_KERNEL);
- if (!auchan)
- return -ENOMEM;
-
- schan = &auchan->shdma_chan;
- schan->max_xfer_len = AUDMAPP_LEN_MAX;
-
- shdma_chan_probe(sdev, schan, id);
-
- auchan->base = audev->chan_reg + 0x20 + (0x10 * id);
- dev_dbg(dev, "%02d : %p / %p", id, auchan->base, audev->chan_reg);
-
- return 0;
-}
-
-static void audmapp_chan_remove(struct audmapp_device *audev)
-{
- struct shdma_chan *schan;
- int i;
-
- shdma_for_each_chan(schan, &audev->shdma_dev, i) {
- BUG_ON(!schan);
- shdma_chan_remove(schan);
- }
-}
-
-static struct dma_chan *audmapp_of_xlate(struct of_phandle_args *dma_spec,
- struct of_dma *ofdma)
-{
- dma_cap_mask_t mask;
- struct dma_chan *chan;
- u32 chcr = dma_spec->args[0];
-
- if (dma_spec->args_count != 1)
- return NULL;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- chan = dma_request_channel(mask, shdma_chan_filter, NULL);
- if (chan)
- to_shdma_chan(chan)->hw_req = chcr;
-
- return chan;
-}
-
-static int audmapp_probe(struct platform_device *pdev)
-{
- struct audmapp_pdata *pdata = pdev->dev.platform_data;
- struct device_node *np = pdev->dev.of_node;
- struct audmapp_device *audev;
- struct shdma_dev *sdev;
- struct dma_device *dma_dev;
- struct resource *res;
- int err, i;
-
- if (np)
- of_dma_controller_register(np, audmapp_of_xlate, pdev);
- else if (!pdata)
- return -ENODEV;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- audev = devm_kzalloc(&pdev->dev, sizeof(*audev), GFP_KERNEL);
- if (!audev)
- return -ENOMEM;
-
- audev->dev = &pdev->dev;
- audev->pdata = pdata;
- audev->chan_reg = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(audev->chan_reg))
- return PTR_ERR(audev->chan_reg);
-
- sdev = &audev->shdma_dev;
- sdev->ops = &audmapp_shdma_ops;
- sdev->desc_size = sizeof(struct audmapp_desc);
-
- dma_dev = &sdev->dma_dev;
- dma_dev->copy_align = LOG2_DEFAULT_XFER_SIZE;
- dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
-
- err = shdma_init(&pdev->dev, sdev, AUDMAPP_MAX_CHANNELS);
- if (err < 0)
- return err;
-
- platform_set_drvdata(pdev, audev);
-
- /* Create DMA Channel */
- for (i = 0; i < AUDMAPP_MAX_CHANNELS; i++) {
- err = audmapp_chan_probe(pdev, audev, i);
- if (err)
- goto chan_probe_err;
- }
-
- err = dma_async_device_register(dma_dev);
- if (err < 0)
- goto chan_probe_err;
-
- return err;
-
-chan_probe_err:
- audmapp_chan_remove(audev);
- shdma_cleanup(sdev);
-
- return err;
-}
-
-static int audmapp_remove(struct platform_device *pdev)
-{
- struct audmapp_device *audev = platform_get_drvdata(pdev);
- struct dma_device *dma_dev = &audev->shdma_dev.dma_dev;
-
- dma_async_device_unregister(dma_dev);
-
- audmapp_chan_remove(audev);
- shdma_cleanup(&audev->shdma_dev);
-
- return 0;
-}
-
-static const struct of_device_id audmapp_of_match[] = {
- { .compatible = "renesas,rcar-audmapp", },
- {},
-};
-
-static struct platform_driver audmapp_driver = {
- .probe = audmapp_probe,
- .remove = audmapp_remove,
- .driver = {
- .name = "rcar-audmapp-engine",
- .of_match_table = audmapp_of_match,
- },
-};
-module_platform_driver(audmapp_driver);
-
-MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
-MODULE_DESCRIPTION("Renesas R-Car Audio DMAC peri-peri driver");
-MODULE_LICENSE("GPL");
return NULL;
}
-static int shdma_setup_slave(struct shdma_chan *schan, int slave_id,
- dma_addr_t slave_addr)
+static int shdma_setup_slave(struct shdma_chan *schan, dma_addr_t slave_addr)
{
struct shdma_dev *sdev = to_shdma_dev(schan->dma_chan.device);
const struct shdma_ops *ops = sdev->ops;
ret = ops->set_slave(schan, match, slave_addr, true);
if (ret < 0)
return ret;
-
- slave_id = schan->slave_id;
} else {
- match = slave_id;
+ match = schan->real_slave_id;
}
- if (slave_id < 0 || slave_id >= slave_num)
+ if (schan->real_slave_id < 0 || schan->real_slave_id >= slave_num)
return -EINVAL;
- if (test_and_set_bit(slave_id, shdma_slave_used))
+ if (test_and_set_bit(schan->real_slave_id, shdma_slave_used))
return -EBUSY;
ret = ops->set_slave(schan, match, slave_addr, false);
if (ret < 0) {
- clear_bit(slave_id, shdma_slave_used);
+ clear_bit(schan->real_slave_id, shdma_slave_used);
return ret;
}
- schan->slave_id = slave_id;
+ schan->slave_id = schan->real_slave_id;
return 0;
}
*/
if (slave) {
/* Legacy mode: .private is set in filter */
- ret = shdma_setup_slave(schan, slave->slave_id, 0);
+ schan->real_slave_id = slave->slave_id;
+ ret = shdma_setup_slave(schan, 0);
if (ret < 0)
goto esetslave;
} else {
+ /* Normal mode: real_slave_id was set by filter */
schan->slave_id = -EINVAL;
}
/*
* This is the standard shdma filter function to be used as a replacement to the
- * "old" method, using the .private pointer. If for some reason you allocate a
- * channel without slave data, use something like ERR_PTR(-EINVAL) as a filter
+ * "old" method, using the .private pointer.
+ * You always have to pass a valid slave id as the argument, old drivers that
+ * pass ERR_PTR(-EINVAL) as a filter parameter and set it up in dma_slave_config
+ * need to be updated so we can remove the slave_id field from dma_slave_config.
* parameter. If this filter is used, the slave driver, after calling
* dma_request_channel(), will also have to call dmaengine_slave_config() with
- * .slave_id, .direction, and either .src_addr or .dst_addr set.
+ * .direction, and either .src_addr or .dst_addr set.
+ *
* NOTE: this filter doesn't support multiple DMAC drivers with the DMA_SLAVE
* capability! If this becomes a requirement, hardware glue drivers, using this
* services would have to provide their own filters, which first would check
{
struct shdma_chan *schan;
struct shdma_dev *sdev;
- int match = (long)arg;
+ int slave_id = (long)arg;
int ret;
/* Only support channels handled by this driver. */
shdma_alloc_chan_resources)
return false;
- if (match < 0)
+ schan = to_shdma_chan(chan);
+ sdev = to_shdma_dev(chan->device);
+
+ /*
+ * For DT, the schan->slave_id field is generated by the
+ * set_slave function from the slave ID that is passed in
+ * from xlate. For the non-DT case, the slave ID is
+ * directly passed into the filter function by the driver
+ */
+ if (schan->dev->of_node) {
+ ret = sdev->ops->set_slave(schan, slave_id, 0, true);
+ if (ret < 0)
+ return false;
+
+ schan->real_slave_id = schan->slave_id;
+ return true;
+ }
+
+ if (slave_id < 0) {
/* No slave requested - arbitrary channel */
+ dev_warn(sdev->dma_dev.dev, "invalid slave ID passed to dma_request_slave\n");
return true;
+ }
- schan = to_shdma_chan(chan);
- if (!schan->dev->of_node && match >= slave_num)
+ if (slave_id >= slave_num)
return false;
- sdev = to_shdma_dev(schan->dma_chan.device);
- ret = sdev->ops->set_slave(schan, match, 0, true);
+ ret = sdev->ops->set_slave(schan, slave_id, 0, true);
if (ret < 0)
return false;
+ schan->real_slave_id = slave_id;
+
return true;
}
EXPORT_SYMBOL(shdma_chan_filter);
chan->private = NULL;
}
+ schan->real_slave_id = 0;
+
spin_lock_irq(&schan->chan_lock);
list_splice_init(&schan->ld_free, &list);
*/
if (!config)
return -EINVAL;
+
+ /*
+ * overriding the slave_id through dma_slave_config is deprecated,
+ * but possibly some out-of-tree drivers still do it.
+ */
+ if (WARN_ON_ONCE(config->slave_id &&
+ config->slave_id != schan->real_slave_id))
+ schan->real_slave_id = config->slave_id;
+
/*
* We could lock this, but you shouldn't be configuring the
* channel, while using it...
*/
- return shdma_setup_slave(schan, config->slave_id,
+ return shdma_setup_slave(schan,
config->direction == DMA_DEV_TO_MEM ?
config->src_addr : config->dst_addr);
}
return ret;
}
-#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARM)
+#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
static irqreturn_t sh_dmae_err(int irq, void *data)
{
struct sh_dmae_device *shdev = data;
const struct sh_dmae_pdata *pdata;
unsigned long chan_flag[SH_DMAE_MAX_CHANNELS] = {};
int chan_irq[SH_DMAE_MAX_CHANNELS];
-#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARM)
+#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
unsigned long irqflags = 0;
int errirq;
#endif
--- /dev/null
+/*
+ * Renesas USB DMA Controller Driver
+ *
+ * Copyright (C) 2015 Renesas Electronics Corporation
+ *
+ * based on rcar-dmac.c
+ * Copyright (C) 2014 Renesas Electronics Inc.
+ * Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_dma.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include "../dmaengine.h"
+#include "../virt-dma.h"
+
+/*
+ * struct usb_dmac_sg - Descriptor for a hardware transfer
+ * @mem_addr: memory address
+ * @size: transfer size in bytes
+ */
+struct usb_dmac_sg {
+ dma_addr_t mem_addr;
+ u32 size;
+};
+
+/*
+ * struct usb_dmac_desc - USB DMA Transfer Descriptor
+ * @vd: base virtual channel DMA transaction descriptor
+ * @direction: direction of the DMA transfer
+ * @sg_allocated_len: length of allocated sg
+ * @sg_len: length of sg
+ * @sg_index: index of sg
+ * @residue: residue after the DMAC completed a transfer
+ * @node: node for desc_got and desc_freed
+ * @done_cookie: cookie after the DMAC completed a transfer
+ * @sg: information for the transfer
+ */
+struct usb_dmac_desc {
+ struct virt_dma_desc vd;
+ enum dma_transfer_direction direction;
+ unsigned int sg_allocated_len;
+ unsigned int sg_len;
+ unsigned int sg_index;
+ u32 residue;
+ struct list_head node;
+ dma_cookie_t done_cookie;
+ struct usb_dmac_sg sg[0];
+};
+
+#define to_usb_dmac_desc(vd) container_of(vd, struct usb_dmac_desc, vd)
+
+/*
+ * struct usb_dmac_chan - USB DMA Controller Channel
+ * @vc: base virtual DMA channel object
+ * @iomem: channel I/O memory base
+ * @index: index of this channel in the controller
+ * @irq: irq number of this channel
+ * @desc: the current descriptor
+ * @descs_allocated: number of descriptors allocated
+ * @desc_got: got descriptors
+ * @desc_freed: freed descriptors after the DMAC completed a transfer
+ */
+struct usb_dmac_chan {
+ struct virt_dma_chan vc;
+ void __iomem *iomem;
+ unsigned int index;
+ int irq;
+ struct usb_dmac_desc *desc;
+ int descs_allocated;
+ struct list_head desc_got;
+ struct list_head desc_freed;
+};
+
+#define to_usb_dmac_chan(c) container_of(c, struct usb_dmac_chan, vc.chan)
+
+/*
+ * struct usb_dmac - USB DMA Controller
+ * @engine: base DMA engine object
+ * @dev: the hardware device
+ * @iomem: remapped I/O memory base
+ * @n_channels: number of available channels
+ * @channels: array of DMAC channels
+ */
+struct usb_dmac {
+ struct dma_device engine;
+ struct device *dev;
+ void __iomem *iomem;
+
+ unsigned int n_channels;
+ struct usb_dmac_chan *channels;
+};
+
+#define to_usb_dmac(d) container_of(d, struct usb_dmac, engine)
+
+/* -----------------------------------------------------------------------------
+ * Registers
+ */
+
+#define USB_DMAC_CHAN_OFFSET(i) (0x20 + 0x20 * (i))
+
+#define USB_DMASWR 0x0008
+#define USB_DMASWR_SWR (1 << 0)
+#define USB_DMAOR 0x0060
+#define USB_DMAOR_AE (1 << 2)
+#define USB_DMAOR_DME (1 << 0)
+
+#define USB_DMASAR 0x0000
+#define USB_DMADAR 0x0004
+#define USB_DMATCR 0x0008
+#define USB_DMATCR_MASK 0x00ffffff
+#define USB_DMACHCR 0x0014
+#define USB_DMACHCR_FTE (1 << 24)
+#define USB_DMACHCR_NULLE (1 << 16)
+#define USB_DMACHCR_NULL (1 << 12)
+#define USB_DMACHCR_TS_8B ((0 << 7) | (0 << 6))
+#define USB_DMACHCR_TS_16B ((0 << 7) | (1 << 6))
+#define USB_DMACHCR_TS_32B ((1 << 7) | (0 << 6))
+#define USB_DMACHCR_IE (1 << 5)
+#define USB_DMACHCR_SP (1 << 2)
+#define USB_DMACHCR_TE (1 << 1)
+#define USB_DMACHCR_DE (1 << 0)
+#define USB_DMATEND 0x0018
+
+/* Hardcode the xfer_shift to 5 (32bytes) */
+#define USB_DMAC_XFER_SHIFT 5
+#define USB_DMAC_XFER_SIZE (1 << USB_DMAC_XFER_SHIFT)
+#define USB_DMAC_CHCR_TS USB_DMACHCR_TS_32B
+#define USB_DMAC_SLAVE_BUSWIDTH DMA_SLAVE_BUSWIDTH_32_BYTES
+
+/* for descriptors */
+#define USB_DMAC_INITIAL_NR_DESC 16
+#define USB_DMAC_INITIAL_NR_SG 8
+
+/* -----------------------------------------------------------------------------
+ * Device access
+ */
+
+static void usb_dmac_write(struct usb_dmac *dmac, u32 reg, u32 data)
+{
+ writel(data, dmac->iomem + reg);
+}
+
+static u32 usb_dmac_read(struct usb_dmac *dmac, u32 reg)
+{
+ return readl(dmac->iomem + reg);
+}
+
+static u32 usb_dmac_chan_read(struct usb_dmac_chan *chan, u32 reg)
+{
+ return readl(chan->iomem + reg);
+}
+
+static void usb_dmac_chan_write(struct usb_dmac_chan *chan, u32 reg, u32 data)
+{
+ writel(data, chan->iomem + reg);
+}
+
+/* -----------------------------------------------------------------------------
+ * Initialization and configuration
+ */
+
+static bool usb_dmac_chan_is_busy(struct usb_dmac_chan *chan)
+{
+ u32 chcr = usb_dmac_chan_read(chan, USB_DMACHCR);
+
+ return (chcr & (USB_DMACHCR_DE | USB_DMACHCR_TE)) == USB_DMACHCR_DE;
+}
+
+static u32 usb_dmac_calc_tend(u32 size)
+{
+ /*
+ * Please refer to the Figure "Example of Final Transaction Valid
+ * Data Transfer Enable (EDTEN) Setting" in the data sheet.
+ */
+ return 0xffffffff << (32 - (size % USB_DMAC_XFER_SIZE ? :
+ USB_DMAC_XFER_SIZE));
+}
+
+/* This function is already held by vc.lock */
+static void usb_dmac_chan_start_sg(struct usb_dmac_chan *chan,
+ unsigned int index)
+{
+ struct usb_dmac_desc *desc = chan->desc;
+ struct usb_dmac_sg *sg = desc->sg + index;
+ dma_addr_t src_addr = 0, dst_addr = 0;
+
+ WARN_ON_ONCE(usb_dmac_chan_is_busy(chan));
+
+ if (desc->direction == DMA_DEV_TO_MEM)
+ dst_addr = sg->mem_addr;
+ else
+ src_addr = sg->mem_addr;
+
+ dev_dbg(chan->vc.chan.device->dev,
+ "chan%u: queue sg %p: %u@%pad -> %pad\n",
+ chan->index, sg, sg->size, &src_addr, &dst_addr);
+
+ usb_dmac_chan_write(chan, USB_DMASAR, src_addr & 0xffffffff);
+ usb_dmac_chan_write(chan, USB_DMADAR, dst_addr & 0xffffffff);
+ usb_dmac_chan_write(chan, USB_DMATCR,
+ DIV_ROUND_UP(sg->size, USB_DMAC_XFER_SIZE));
+ usb_dmac_chan_write(chan, USB_DMATEND, usb_dmac_calc_tend(sg->size));
+
+ usb_dmac_chan_write(chan, USB_DMACHCR, USB_DMAC_CHCR_TS |
+ USB_DMACHCR_NULLE | USB_DMACHCR_IE | USB_DMACHCR_DE);
+}
+
+/* This function is already held by vc.lock */
+static void usb_dmac_chan_start_desc(struct usb_dmac_chan *chan)
+{
+ struct virt_dma_desc *vd;
+
+ vd = vchan_next_desc(&chan->vc);
+ if (!vd) {
+ chan->desc = NULL;
+ return;
+ }
+
+ /*
+ * Remove this request from vc->desc_issued. Otherwise, this driver
+ * will get the previous value from vchan_next_desc() after a transfer
+ * was completed.
+ */
+ list_del(&vd->node);
+
+ chan->desc = to_usb_dmac_desc(vd);
+ chan->desc->sg_index = 0;
+ usb_dmac_chan_start_sg(chan, 0);
+}
+
+static int usb_dmac_init(struct usb_dmac *dmac)
+{
+ u16 dmaor;
+
+ /* Clear all channels and enable the DMAC globally. */
+ usb_dmac_write(dmac, USB_DMAOR, USB_DMAOR_DME);
+
+ dmaor = usb_dmac_read(dmac, USB_DMAOR);
+ if ((dmaor & (USB_DMAOR_AE | USB_DMAOR_DME)) != USB_DMAOR_DME) {
+ dev_warn(dmac->dev, "DMAOR initialization failed.\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Descriptors allocation and free
+ */
+static int usb_dmac_desc_alloc(struct usb_dmac_chan *chan, unsigned int sg_len,
+ gfp_t gfp)
+{
+ struct usb_dmac_desc *desc;
+ unsigned long flags;
+
+ desc = kzalloc(sizeof(*desc) + sg_len * sizeof(desc->sg[0]), gfp);
+ if (!desc)
+ return -ENOMEM;
+
+ desc->sg_allocated_len = sg_len;
+ INIT_LIST_HEAD(&desc->node);
+
+ spin_lock_irqsave(&chan->vc.lock, flags);
+ list_add_tail(&desc->node, &chan->desc_freed);
+ spin_unlock_irqrestore(&chan->vc.lock, flags);
+
+ return 0;
+}
+
+static void usb_dmac_desc_free(struct usb_dmac_chan *chan)
+{
+ struct usb_dmac_desc *desc, *_desc;
+ LIST_HEAD(list);
+
+ list_splice_init(&chan->desc_freed, &list);
+ list_splice_init(&chan->desc_got, &list);
+
+ list_for_each_entry_safe(desc, _desc, &list, node) {
+ list_del(&desc->node);
+ kfree(desc);
+ }
+ chan->descs_allocated = 0;
+}
+
+static struct usb_dmac_desc *usb_dmac_desc_get(struct usb_dmac_chan *chan,
+ unsigned int sg_len, gfp_t gfp)
+{
+ struct usb_dmac_desc *desc = NULL;
+ unsigned long flags;
+
+ /* Get a freed descritpor */
+ spin_lock_irqsave(&chan->vc.lock, flags);
+ list_for_each_entry(desc, &chan->desc_freed, node) {
+ if (sg_len <= desc->sg_allocated_len) {
+ list_move_tail(&desc->node, &chan->desc_got);
+ spin_unlock_irqrestore(&chan->vc.lock, flags);
+ return desc;
+ }
+ }
+ spin_unlock_irqrestore(&chan->vc.lock, flags);
+
+ /* Allocate a new descriptor */
+ if (!usb_dmac_desc_alloc(chan, sg_len, gfp)) {
+ /* If allocated the desc, it was added to tail of the list */
+ spin_lock_irqsave(&chan->vc.lock, flags);
+ desc = list_last_entry(&chan->desc_freed, struct usb_dmac_desc,
+ node);
+ list_move_tail(&desc->node, &chan->desc_got);
+ spin_unlock_irqrestore(&chan->vc.lock, flags);
+ return desc;
+ }
+
+ return NULL;
+}
+
+static void usb_dmac_desc_put(struct usb_dmac_chan *chan,
+ struct usb_dmac_desc *desc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&chan->vc.lock, flags);
+ list_move_tail(&desc->node, &chan->desc_freed);
+ spin_unlock_irqrestore(&chan->vc.lock, flags);
+}
+
+/* -----------------------------------------------------------------------------
+ * Stop and reset
+ */
+
+static void usb_dmac_soft_reset(struct usb_dmac_chan *uchan)
+{
+ struct dma_chan *chan = &uchan->vc.chan;
+ struct usb_dmac *dmac = to_usb_dmac(chan->device);
+ int i;
+
+ /* Don't issue soft reset if any one of channels is busy */
+ for (i = 0; i < dmac->n_channels; ++i) {
+ if (usb_dmac_chan_is_busy(uchan))
+ return;
+ }
+
+ usb_dmac_write(dmac, USB_DMAOR, 0);
+ usb_dmac_write(dmac, USB_DMASWR, USB_DMASWR_SWR);
+ udelay(100);
+ usb_dmac_write(dmac, USB_DMASWR, 0);
+ usb_dmac_write(dmac, USB_DMAOR, 1);
+}
+
+static void usb_dmac_chan_halt(struct usb_dmac_chan *chan)
+{
+ u32 chcr = usb_dmac_chan_read(chan, USB_DMACHCR);
+
+ chcr &= ~(USB_DMACHCR_IE | USB_DMACHCR_TE | USB_DMACHCR_DE);
+ usb_dmac_chan_write(chan, USB_DMACHCR, chcr);
+
+ usb_dmac_soft_reset(chan);
+}
+
+static void usb_dmac_stop(struct usb_dmac *dmac)
+{
+ usb_dmac_write(dmac, USB_DMAOR, 0);
+}
+
+/* -----------------------------------------------------------------------------
+ * DMA engine operations
+ */
+
+static int usb_dmac_alloc_chan_resources(struct dma_chan *chan)
+{
+ struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
+ int ret;
+
+ while (uchan->descs_allocated < USB_DMAC_INITIAL_NR_DESC) {
+ ret = usb_dmac_desc_alloc(uchan, USB_DMAC_INITIAL_NR_SG,
+ GFP_KERNEL);
+ if (ret < 0) {
+ usb_dmac_desc_free(uchan);
+ return ret;
+ }
+ uchan->descs_allocated++;
+ }
+
+ return pm_runtime_get_sync(chan->device->dev);
+}
+
+static void usb_dmac_free_chan_resources(struct dma_chan *chan)
+{
+ struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
+ unsigned long flags;
+
+ /* Protect against ISR */
+ spin_lock_irqsave(&uchan->vc.lock, flags);
+ usb_dmac_chan_halt(uchan);
+ spin_unlock_irqrestore(&uchan->vc.lock, flags);
+
+ usb_dmac_desc_free(uchan);
+ vchan_free_chan_resources(&uchan->vc);
+
+ pm_runtime_put(chan->device->dev);
+}
+
+static struct dma_async_tx_descriptor *
+usb_dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
+ unsigned int sg_len, enum dma_transfer_direction dir,
+ unsigned long dma_flags, void *context)
+{
+ struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
+ struct usb_dmac_desc *desc;
+ struct scatterlist *sg;
+ int i;
+
+ if (!sg_len) {
+ dev_warn(chan->device->dev,
+ "%s: bad parameter: len=%d\n", __func__, sg_len);
+ return NULL;
+ }
+
+ desc = usb_dmac_desc_get(uchan, sg_len, GFP_NOWAIT);
+ if (!desc)
+ return NULL;
+
+ desc->direction = dir;
+ desc->sg_len = sg_len;
+ for_each_sg(sgl, sg, sg_len, i) {
+ desc->sg[i].mem_addr = sg_dma_address(sg);
+ desc->sg[i].size = sg_dma_len(sg);
+ }
+
+ return vchan_tx_prep(&uchan->vc, &desc->vd, dma_flags);
+}
+
+static int usb_dmac_chan_terminate_all(struct dma_chan *chan)
+{
+ struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
+ struct usb_dmac_desc *desc;
+ unsigned long flags;
+ LIST_HEAD(head);
+ LIST_HEAD(list);
+
+ spin_lock_irqsave(&uchan->vc.lock, flags);
+ usb_dmac_chan_halt(uchan);
+ vchan_get_all_descriptors(&uchan->vc, &head);
+ if (uchan->desc)
+ uchan->desc = NULL;
+ list_splice_init(&uchan->desc_got, &list);
+ list_for_each_entry(desc, &list, node)
+ list_move_tail(&desc->node, &uchan->desc_freed);
+ spin_unlock_irqrestore(&uchan->vc.lock, flags);
+ vchan_dma_desc_free_list(&uchan->vc, &head);
+
+ return 0;
+}
+
+static unsigned int usb_dmac_get_current_residue(struct usb_dmac_chan *chan,
+ struct usb_dmac_desc *desc,
+ int sg_index)
+{
+ struct usb_dmac_sg *sg = desc->sg + sg_index;
+ u32 mem_addr = sg->mem_addr & 0xffffffff;
+ unsigned int residue = sg->size;
+
+ /*
+ * We cannot use USB_DMATCR to calculate residue because USB_DMATCR
+ * has unsuited value to calculate.
+ */
+ if (desc->direction == DMA_DEV_TO_MEM)
+ residue -= usb_dmac_chan_read(chan, USB_DMADAR) - mem_addr;
+ else
+ residue -= usb_dmac_chan_read(chan, USB_DMASAR) - mem_addr;
+
+ return residue;
+}
+
+static u32 usb_dmac_chan_get_residue_if_complete(struct usb_dmac_chan *chan,
+ dma_cookie_t cookie)
+{
+ struct usb_dmac_desc *desc;
+ u32 residue = 0;
+
+ list_for_each_entry_reverse(desc, &chan->desc_freed, node) {
+ if (desc->done_cookie == cookie) {
+ residue = desc->residue;
+ break;
+ }
+ }
+
+ return residue;
+}
+
+static u32 usb_dmac_chan_get_residue(struct usb_dmac_chan *chan,
+ dma_cookie_t cookie)
+{
+ u32 residue = 0;
+ struct virt_dma_desc *vd;
+ struct usb_dmac_desc *desc = chan->desc;
+ int i;
+
+ if (!desc) {
+ vd = vchan_find_desc(&chan->vc, cookie);
+ if (!vd)
+ return 0;
+ desc = to_usb_dmac_desc(vd);
+ }
+
+ /* Compute the size of all usb_dmac_sg still to be transferred */
+ for (i = desc->sg_index + 1; i < desc->sg_len; i++)
+ residue += desc->sg[i].size;
+
+ /* Add the residue for the current sg */
+ residue += usb_dmac_get_current_residue(chan, desc, desc->sg_index);
+
+ return residue;
+}
+
+static enum dma_status usb_dmac_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
+ enum dma_status status;
+ unsigned int residue = 0;
+ unsigned long flags;
+
+ status = dma_cookie_status(chan, cookie, txstate);
+ /* a client driver will get residue after DMA_COMPLETE */
+ if (!txstate)
+ return status;
+
+ spin_lock_irqsave(&uchan->vc.lock, flags);
+ if (status == DMA_COMPLETE)
+ residue = usb_dmac_chan_get_residue_if_complete(uchan, cookie);
+ else
+ residue = usb_dmac_chan_get_residue(uchan, cookie);
+ spin_unlock_irqrestore(&uchan->vc.lock, flags);
+
+ dma_set_residue(txstate, residue);
+
+ return status;
+}
+
+static void usb_dmac_issue_pending(struct dma_chan *chan)
+{
+ struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&uchan->vc.lock, flags);
+ if (vchan_issue_pending(&uchan->vc) && !uchan->desc)
+ usb_dmac_chan_start_desc(uchan);
+ spin_unlock_irqrestore(&uchan->vc.lock, flags);
+}
+
+static void usb_dmac_virt_desc_free(struct virt_dma_desc *vd)
+{
+ struct usb_dmac_desc *desc = to_usb_dmac_desc(vd);
+ struct usb_dmac_chan *chan = to_usb_dmac_chan(vd->tx.chan);
+
+ usb_dmac_desc_put(chan, desc);
+}
+
+/* -----------------------------------------------------------------------------
+ * IRQ handling
+ */
+
+static void usb_dmac_isr_transfer_end(struct usb_dmac_chan *chan)
+{
+ struct usb_dmac_desc *desc = chan->desc;
+
+ BUG_ON(!desc);
+
+ if (++desc->sg_index < desc->sg_len) {
+ usb_dmac_chan_start_sg(chan, desc->sg_index);
+ } else {
+ desc->residue = usb_dmac_get_current_residue(chan, desc,
+ desc->sg_index - 1);
+ desc->done_cookie = desc->vd.tx.cookie;
+ vchan_cookie_complete(&desc->vd);
+
+ /* Restart the next transfer if this driver has a next desc */
+ usb_dmac_chan_start_desc(chan);
+ }
+}
+
+static irqreturn_t usb_dmac_isr_channel(int irq, void *dev)
+{
+ struct usb_dmac_chan *chan = dev;
+ irqreturn_t ret = IRQ_NONE;
+ u32 mask = USB_DMACHCR_TE;
+ u32 check_bits = USB_DMACHCR_TE | USB_DMACHCR_SP;
+ u32 chcr;
+
+ spin_lock(&chan->vc.lock);
+
+ chcr = usb_dmac_chan_read(chan, USB_DMACHCR);
+ if (chcr & check_bits)
+ mask |= USB_DMACHCR_DE | check_bits;
+ if (chcr & USB_DMACHCR_NULL) {
+ /* An interruption of TE will happen after we set FTE */
+ mask |= USB_DMACHCR_NULL;
+ chcr |= USB_DMACHCR_FTE;
+ ret |= IRQ_HANDLED;
+ }
+ usb_dmac_chan_write(chan, USB_DMACHCR, chcr & ~mask);
+
+ if (chcr & check_bits) {
+ usb_dmac_isr_transfer_end(chan);
+ ret |= IRQ_HANDLED;
+ }
+
+ spin_unlock(&chan->vc.lock);
+
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * OF xlate and channel filter
+ */
+
+static bool usb_dmac_chan_filter(struct dma_chan *chan, void *arg)
+{
+ struct usb_dmac_chan *uchan = to_usb_dmac_chan(chan);
+ struct of_phandle_args *dma_spec = arg;
+
+ if (dma_spec->np != chan->device->dev->of_node)
+ return false;
+
+ /* USB-DMAC should be used with fixed usb controller's FIFO */
+ if (uchan->index != dma_spec->args[0])
+ return false;
+
+ return true;
+}
+
+static struct dma_chan *usb_dmac_of_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct usb_dmac_chan *uchan;
+ struct dma_chan *chan;
+ dma_cap_mask_t mask;
+
+ if (dma_spec->args_count != 1)
+ return NULL;
+
+ /* Only slave DMA channels can be allocated via DT */
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ chan = dma_request_channel(mask, usb_dmac_chan_filter, dma_spec);
+ if (!chan)
+ return NULL;
+
+ uchan = to_usb_dmac_chan(chan);
+
+ return chan;
+}
+
+/* -----------------------------------------------------------------------------
+ * Power management
+ */
+
+static int usb_dmac_runtime_suspend(struct device *dev)
+{
+ struct usb_dmac *dmac = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < dmac->n_channels; ++i)
+ usb_dmac_chan_halt(&dmac->channels[i]);
+
+ return 0;
+}
+
+static int usb_dmac_runtime_resume(struct device *dev)
+{
+ struct usb_dmac *dmac = dev_get_drvdata(dev);
+
+ return usb_dmac_init(dmac);
+}
+
+static const struct dev_pm_ops usb_dmac_pm = {
+ SET_RUNTIME_PM_OPS(usb_dmac_runtime_suspend, usb_dmac_runtime_resume,
+ NULL)
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe and remove
+ */
+
+static int usb_dmac_chan_probe(struct usb_dmac *dmac,
+ struct usb_dmac_chan *uchan,
+ unsigned int index)
+{
+ struct platform_device *pdev = to_platform_device(dmac->dev);
+ char pdev_irqname[5];
+ char *irqname;
+ int ret;
+
+ uchan->index = index;
+ uchan->iomem = dmac->iomem + USB_DMAC_CHAN_OFFSET(index);
+
+ /* Request the channel interrupt. */
+ sprintf(pdev_irqname, "ch%u", index);
+ uchan->irq = platform_get_irq_byname(pdev, pdev_irqname);
+ if (uchan->irq < 0) {
+ dev_err(dmac->dev, "no IRQ specified for channel %u\n", index);
+ return -ENODEV;
+ }
+
+ irqname = devm_kasprintf(dmac->dev, GFP_KERNEL, "%s:%u",
+ dev_name(dmac->dev), index);
+ if (!irqname)
+ return -ENOMEM;
+
+ ret = devm_request_irq(dmac->dev, uchan->irq, usb_dmac_isr_channel,
+ IRQF_SHARED, irqname, uchan);
+ if (ret) {
+ dev_err(dmac->dev, "failed to request IRQ %u (%d)\n",
+ uchan->irq, ret);
+ return ret;
+ }
+
+ uchan->vc.desc_free = usb_dmac_virt_desc_free;
+ vchan_init(&uchan->vc, &dmac->engine);
+ INIT_LIST_HEAD(&uchan->desc_freed);
+ INIT_LIST_HEAD(&uchan->desc_got);
+
+ return 0;
+}
+
+static int usb_dmac_parse_of(struct device *dev, struct usb_dmac *dmac)
+{
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ ret = of_property_read_u32(np, "dma-channels", &dmac->n_channels);
+ if (ret < 0) {
+ dev_err(dev, "unable to read dma-channels property\n");
+ return ret;
+ }
+
+ if (dmac->n_channels <= 0 || dmac->n_channels >= 100) {
+ dev_err(dev, "invalid number of channels %u\n",
+ dmac->n_channels);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int usb_dmac_probe(struct platform_device *pdev)
+{
+ const enum dma_slave_buswidth widths = USB_DMAC_SLAVE_BUSWIDTH;
+ struct dma_device *engine;
+ struct usb_dmac *dmac;
+ struct resource *mem;
+ unsigned int i;
+ int ret;
+
+ dmac = devm_kzalloc(&pdev->dev, sizeof(*dmac), GFP_KERNEL);
+ if (!dmac)
+ return -ENOMEM;
+
+ dmac->dev = &pdev->dev;
+ platform_set_drvdata(pdev, dmac);
+
+ ret = usb_dmac_parse_of(&pdev->dev, dmac);
+ if (ret < 0)
+ return ret;
+
+ dmac->channels = devm_kcalloc(&pdev->dev, dmac->n_channels,
+ sizeof(*dmac->channels), GFP_KERNEL);
+ if (!dmac->channels)
+ return -ENOMEM;
+
+ /* Request resources. */
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ dmac->iomem = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(dmac->iomem))
+ return PTR_ERR(dmac->iomem);
+
+ /* Enable runtime PM and initialize the device. */
+ pm_runtime_enable(&pdev->dev);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret);
+ return ret;
+ }
+
+ ret = usb_dmac_init(dmac);
+ pm_runtime_put(&pdev->dev);
+
+ if (ret) {
+ dev_err(&pdev->dev, "failed to reset device\n");
+ goto error;
+ }
+
+ /* Initialize the channels. */
+ INIT_LIST_HEAD(&dmac->engine.channels);
+
+ for (i = 0; i < dmac->n_channels; ++i) {
+ ret = usb_dmac_chan_probe(dmac, &dmac->channels[i], i);
+ if (ret < 0)
+ goto error;
+ }
+
+ /* Register the DMAC as a DMA provider for DT. */
+ ret = of_dma_controller_register(pdev->dev.of_node, usb_dmac_of_xlate,
+ NULL);
+ if (ret < 0)
+ goto error;
+
+ /*
+ * Register the DMA engine device.
+ *
+ * Default transfer size of 32 bytes requires 32-byte alignment.
+ */
+ engine = &dmac->engine;
+ dma_cap_set(DMA_SLAVE, engine->cap_mask);
+
+ engine->dev = &pdev->dev;
+
+ engine->src_addr_widths = widths;
+ engine->dst_addr_widths = widths;
+ engine->directions = BIT(DMA_MEM_TO_DEV) | BIT(DMA_DEV_TO_MEM);
+ engine->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+
+ engine->device_alloc_chan_resources = usb_dmac_alloc_chan_resources;
+ engine->device_free_chan_resources = usb_dmac_free_chan_resources;
+ engine->device_prep_slave_sg = usb_dmac_prep_slave_sg;
+ engine->device_terminate_all = usb_dmac_chan_terminate_all;
+ engine->device_tx_status = usb_dmac_tx_status;
+ engine->device_issue_pending = usb_dmac_issue_pending;
+
+ ret = dma_async_device_register(engine);
+ if (ret < 0)
+ goto error;
+
+ return 0;
+
+error:
+ of_dma_controller_free(pdev->dev.of_node);
+ pm_runtime_disable(&pdev->dev);
+ return ret;
+}
+
+static void usb_dmac_chan_remove(struct usb_dmac *dmac,
+ struct usb_dmac_chan *uchan)
+{
+ usb_dmac_chan_halt(uchan);
+ devm_free_irq(dmac->dev, uchan->irq, uchan);
+}
+
+static int usb_dmac_remove(struct platform_device *pdev)
+{
+ struct usb_dmac *dmac = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < dmac->n_channels; ++i)
+ usb_dmac_chan_remove(dmac, &dmac->channels[i]);
+ of_dma_controller_free(pdev->dev.of_node);
+ dma_async_device_unregister(&dmac->engine);
+
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static void usb_dmac_shutdown(struct platform_device *pdev)
+{
+ struct usb_dmac *dmac = platform_get_drvdata(pdev);
+
+ usb_dmac_stop(dmac);
+}
+
+static const struct of_device_id usb_dmac_of_ids[] = {
+ { .compatible = "renesas,usb-dmac", },
+ { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, usb_dmac_of_ids);
+
+static struct platform_driver usb_dmac_driver = {
+ .driver = {
+ .pm = &usb_dmac_pm,
+ .name = "usb-dmac",
+ .of_match_table = usb_dmac_of_ids,
+ },
+ .probe = usb_dmac_probe,
+ .remove = usb_dmac_remove,
+ .shutdown = usb_dmac_shutdown,
+};
+
+module_platform_driver(usb_dmac_driver);
+
+MODULE_DESCRIPTION("Renesas USB DMA Controller Driver");
+MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
+MODULE_LICENSE("GPL v2");
SET_SYSTEM_SLEEP_PM_OPS(sirfsoc_dma_pm_suspend, sirfsoc_dma_pm_resume)
};
-static struct of_device_id sirfsoc_dma_match[] = {
+static const struct of_device_id sirfsoc_dma_match[] = {
{ .compatible = "sirf,prima2-dmac", },
{ .compatible = "sirf,marco-dmac", },
{},
sg_dma_len(&dst_sg) = size;
sg_dma_len(&src_sg) = size;
- return d40_prep_sg(chan, &src_sg, &dst_sg, 1, DMA_NONE, dma_flags);
+ return d40_prep_sg(chan, &src_sg, &dst_sg, 1,
+ DMA_MEM_TO_MEM, dma_flags);
}
static struct dma_async_tx_descriptor *
if (dst_nents != src_nents)
return NULL;
- return d40_prep_sg(chan, src_sg, dst_sg, src_nents, DMA_NONE, dma_flags);
+ return d40_prep_sg(chan, src_sg, dst_sg, src_nents,
+ DMA_MEM_TO_MEM, dma_flags);
}
static struct dma_async_tx_descriptor *
spin_unlock_irqrestore(&vchan->vc.lock, flags);
}
-static int sun6i_dma_alloc_chan_resources(struct dma_chan *chan)
-{
- return 0;
-}
-
static void sun6i_dma_free_chan_resources(struct dma_chan *chan)
{
struct sun6i_dma_dev *sdev = to_sun6i_dma_dev(chan->device);
.nr_max_vchans = 37,
};
-static struct of_device_id sun6i_dma_match[] = {
+static const struct of_device_id sun6i_dma_match[] = {
{ .compatible = "allwinner,sun6i-a31-dma", .data = &sun6i_a31_dma_cfg },
{ .compatible = "allwinner,sun8i-a23-dma", .data = &sun8i_a23_dma_cfg },
{ /* sentinel */ }
dma_cap_set(DMA_SLAVE, sdc->slave.cap_mask);
INIT_LIST_HEAD(&sdc->slave.channels);
- sdc->slave.device_alloc_chan_resources = sun6i_dma_alloc_chan_resources;
sdc->slave.device_free_chan_resources = sun6i_dma_free_chan_resources;
sdc->slave.device_tx_status = sun6i_dma_tx_status;
sdc->slave.device_issue_pending = sun6i_dma_issue_pending;
--- /dev/null
+/*
+ * Applied Micro X-Gene SoC DMA engine Driver
+ *
+ * Copyright (c) 2015, Applied Micro Circuits Corporation
+ * Authors: Rameshwar Prasad Sahu <rsahu@apm.com>
+ * Loc Ho <lho@apm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * NOTE: PM support is currently not available.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+
+#include "dmaengine.h"
+
+/* X-Gene DMA ring csr registers and bit definations */
+#define XGENE_DMA_RING_CONFIG 0x04
+#define XGENE_DMA_RING_ENABLE BIT(31)
+#define XGENE_DMA_RING_ID 0x08
+#define XGENE_DMA_RING_ID_SETUP(v) ((v) | BIT(31))
+#define XGENE_DMA_RING_ID_BUF 0x0C
+#define XGENE_DMA_RING_ID_BUF_SETUP(v) (((v) << 9) | BIT(21))
+#define XGENE_DMA_RING_THRESLD0_SET1 0x30
+#define XGENE_DMA_RING_THRESLD0_SET1_VAL 0X64
+#define XGENE_DMA_RING_THRESLD1_SET1 0x34
+#define XGENE_DMA_RING_THRESLD1_SET1_VAL 0xC8
+#define XGENE_DMA_RING_HYSTERESIS 0x68
+#define XGENE_DMA_RING_HYSTERESIS_VAL 0xFFFFFFFF
+#define XGENE_DMA_RING_STATE 0x6C
+#define XGENE_DMA_RING_STATE_WR_BASE 0x70
+#define XGENE_DMA_RING_NE_INT_MODE 0x017C
+#define XGENE_DMA_RING_NE_INT_MODE_SET(m, v) \
+ ((m) = ((m) & ~BIT(31 - (v))) | BIT(31 - (v)))
+#define XGENE_DMA_RING_NE_INT_MODE_RESET(m, v) \
+ ((m) &= (~BIT(31 - (v))))
+#define XGENE_DMA_RING_CLKEN 0xC208
+#define XGENE_DMA_RING_SRST 0xC200
+#define XGENE_DMA_RING_MEM_RAM_SHUTDOWN 0xD070
+#define XGENE_DMA_RING_BLK_MEM_RDY 0xD074
+#define XGENE_DMA_RING_BLK_MEM_RDY_VAL 0xFFFFFFFF
+#define XGENE_DMA_RING_DESC_CNT(v) (((v) & 0x0001FFFE) >> 1)
+#define XGENE_DMA_RING_ID_GET(owner, num) (((owner) << 6) | (num))
+#define XGENE_DMA_RING_DST_ID(v) ((1 << 10) | (v))
+#define XGENE_DMA_RING_CMD_OFFSET 0x2C
+#define XGENE_DMA_RING_CMD_BASE_OFFSET(v) ((v) << 6)
+#define XGENE_DMA_RING_COHERENT_SET(m) \
+ (((u32 *)(m))[2] |= BIT(4))
+#define XGENE_DMA_RING_ADDRL_SET(m, v) \
+ (((u32 *)(m))[2] |= (((v) >> 8) << 5))
+#define XGENE_DMA_RING_ADDRH_SET(m, v) \
+ (((u32 *)(m))[3] |= ((v) >> 35))
+#define XGENE_DMA_RING_ACCEPTLERR_SET(m) \
+ (((u32 *)(m))[3] |= BIT(19))
+#define XGENE_DMA_RING_SIZE_SET(m, v) \
+ (((u32 *)(m))[3] |= ((v) << 23))
+#define XGENE_DMA_RING_RECOMBBUF_SET(m) \
+ (((u32 *)(m))[3] |= BIT(27))
+#define XGENE_DMA_RING_RECOMTIMEOUTL_SET(m) \
+ (((u32 *)(m))[3] |= (0x7 << 28))
+#define XGENE_DMA_RING_RECOMTIMEOUTH_SET(m) \
+ (((u32 *)(m))[4] |= 0x3)
+#define XGENE_DMA_RING_SELTHRSH_SET(m) \
+ (((u32 *)(m))[4] |= BIT(3))
+#define XGENE_DMA_RING_TYPE_SET(m, v) \
+ (((u32 *)(m))[4] |= ((v) << 19))
+
+/* X-Gene DMA device csr registers and bit definitions */
+#define XGENE_DMA_IPBRR 0x0
+#define XGENE_DMA_DEV_ID_RD(v) ((v) & 0x00000FFF)
+#define XGENE_DMA_BUS_ID_RD(v) (((v) >> 12) & 3)
+#define XGENE_DMA_REV_NO_RD(v) (((v) >> 14) & 3)
+#define XGENE_DMA_GCR 0x10
+#define XGENE_DMA_CH_SETUP(v) \
+ ((v) = ((v) & ~0x000FFFFF) | 0x000AAFFF)
+#define XGENE_DMA_ENABLE(v) ((v) |= BIT(31))
+#define XGENE_DMA_DISABLE(v) ((v) &= ~BIT(31))
+#define XGENE_DMA_RAID6_CONT 0x14
+#define XGENE_DMA_RAID6_MULTI_CTRL(v) ((v) << 24)
+#define XGENE_DMA_INT 0x70
+#define XGENE_DMA_INT_MASK 0x74
+#define XGENE_DMA_INT_ALL_MASK 0xFFFFFFFF
+#define XGENE_DMA_INT_ALL_UNMASK 0x0
+#define XGENE_DMA_INT_MASK_SHIFT 0x14
+#define XGENE_DMA_RING_INT0_MASK 0x90A0
+#define XGENE_DMA_RING_INT1_MASK 0x90A8
+#define XGENE_DMA_RING_INT2_MASK 0x90B0
+#define XGENE_DMA_RING_INT3_MASK 0x90B8
+#define XGENE_DMA_RING_INT4_MASK 0x90C0
+#define XGENE_DMA_CFG_RING_WQ_ASSOC 0x90E0
+#define XGENE_DMA_ASSOC_RING_MNGR1 0xFFFFFFFF
+#define XGENE_DMA_MEM_RAM_SHUTDOWN 0xD070
+#define XGENE_DMA_BLK_MEM_RDY 0xD074
+#define XGENE_DMA_BLK_MEM_RDY_VAL 0xFFFFFFFF
+
+/* X-Gene SoC EFUSE csr register and bit defination */
+#define XGENE_SOC_JTAG1_SHADOW 0x18
+#define XGENE_DMA_PQ_DISABLE_MASK BIT(13)
+
+/* X-Gene DMA Descriptor format */
+#define XGENE_DMA_DESC_NV_BIT BIT_ULL(50)
+#define XGENE_DMA_DESC_IN_BIT BIT_ULL(55)
+#define XGENE_DMA_DESC_C_BIT BIT_ULL(63)
+#define XGENE_DMA_DESC_DR_BIT BIT_ULL(61)
+#define XGENE_DMA_DESC_ELERR_POS 46
+#define XGENE_DMA_DESC_RTYPE_POS 56
+#define XGENE_DMA_DESC_LERR_POS 60
+#define XGENE_DMA_DESC_FLYBY_POS 4
+#define XGENE_DMA_DESC_BUFLEN_POS 48
+#define XGENE_DMA_DESC_HOENQ_NUM_POS 48
+
+#define XGENE_DMA_DESC_NV_SET(m) \
+ (((u64 *)(m))[0] |= XGENE_DMA_DESC_NV_BIT)
+#define XGENE_DMA_DESC_IN_SET(m) \
+ (((u64 *)(m))[0] |= XGENE_DMA_DESC_IN_BIT)
+#define XGENE_DMA_DESC_RTYPE_SET(m, v) \
+ (((u64 *)(m))[0] |= ((u64)(v) << XGENE_DMA_DESC_RTYPE_POS))
+#define XGENE_DMA_DESC_BUFADDR_SET(m, v) \
+ (((u64 *)(m))[0] |= (v))
+#define XGENE_DMA_DESC_BUFLEN_SET(m, v) \
+ (((u64 *)(m))[0] |= ((u64)(v) << XGENE_DMA_DESC_BUFLEN_POS))
+#define XGENE_DMA_DESC_C_SET(m) \
+ (((u64 *)(m))[1] |= XGENE_DMA_DESC_C_BIT)
+#define XGENE_DMA_DESC_FLYBY_SET(m, v) \
+ (((u64 *)(m))[2] |= ((v) << XGENE_DMA_DESC_FLYBY_POS))
+#define XGENE_DMA_DESC_MULTI_SET(m, v, i) \
+ (((u64 *)(m))[2] |= ((u64)(v) << (((i) + 1) * 8)))
+#define XGENE_DMA_DESC_DR_SET(m) \
+ (((u64 *)(m))[2] |= XGENE_DMA_DESC_DR_BIT)
+#define XGENE_DMA_DESC_DST_ADDR_SET(m, v) \
+ (((u64 *)(m))[3] |= (v))
+#define XGENE_DMA_DESC_H0ENQ_NUM_SET(m, v) \
+ (((u64 *)(m))[3] |= ((u64)(v) << XGENE_DMA_DESC_HOENQ_NUM_POS))
+#define XGENE_DMA_DESC_ELERR_RD(m) \
+ (((m) >> XGENE_DMA_DESC_ELERR_POS) & 0x3)
+#define XGENE_DMA_DESC_LERR_RD(m) \
+ (((m) >> XGENE_DMA_DESC_LERR_POS) & 0x7)
+#define XGENE_DMA_DESC_STATUS(elerr, lerr) \
+ (((elerr) << 4) | (lerr))
+
+/* X-Gene DMA descriptor empty s/w signature */
+#define XGENE_DMA_DESC_EMPTY_INDEX 0
+#define XGENE_DMA_DESC_EMPTY_SIGNATURE ~0ULL
+#define XGENE_DMA_DESC_SET_EMPTY(m) \
+ (((u64 *)(m))[XGENE_DMA_DESC_EMPTY_INDEX] = \
+ XGENE_DMA_DESC_EMPTY_SIGNATURE)
+#define XGENE_DMA_DESC_IS_EMPTY(m) \
+ (((u64 *)(m))[XGENE_DMA_DESC_EMPTY_INDEX] == \
+ XGENE_DMA_DESC_EMPTY_SIGNATURE)
+
+/* X-Gene DMA configurable parameters defines */
+#define XGENE_DMA_RING_NUM 512
+#define XGENE_DMA_BUFNUM 0x0
+#define XGENE_DMA_CPU_BUFNUM 0x18
+#define XGENE_DMA_RING_OWNER_DMA 0x03
+#define XGENE_DMA_RING_OWNER_CPU 0x0F
+#define XGENE_DMA_RING_TYPE_REGULAR 0x01
+#define XGENE_DMA_RING_WQ_DESC_SIZE 32 /* 32 Bytes */
+#define XGENE_DMA_RING_NUM_CONFIG 5
+#define XGENE_DMA_MAX_CHANNEL 4
+#define XGENE_DMA_XOR_CHANNEL 0
+#define XGENE_DMA_PQ_CHANNEL 1
+#define XGENE_DMA_MAX_BYTE_CNT 0x4000 /* 16 KB */
+#define XGENE_DMA_MAX_64B_DESC_BYTE_CNT 0x14000 /* 80 KB */
+#define XGENE_DMA_XOR_ALIGNMENT 6 /* 64 Bytes */
+#define XGENE_DMA_MAX_XOR_SRC 5
+#define XGENE_DMA_16K_BUFFER_LEN_CODE 0x0
+#define XGENE_DMA_INVALID_LEN_CODE 0x7800
+
+/* X-Gene DMA descriptor error codes */
+#define ERR_DESC_AXI 0x01
+#define ERR_BAD_DESC 0x02
+#define ERR_READ_DATA_AXI 0x03
+#define ERR_WRITE_DATA_AXI 0x04
+#define ERR_FBP_TIMEOUT 0x05
+#define ERR_ECC 0x06
+#define ERR_DIFF_SIZE 0x08
+#define ERR_SCT_GAT_LEN 0x09
+#define ERR_CRC_ERR 0x11
+#define ERR_CHKSUM 0x12
+#define ERR_DIF 0x13
+
+/* X-Gene DMA error interrupt codes */
+#define ERR_DIF_SIZE_INT 0x0
+#define ERR_GS_ERR_INT 0x1
+#define ERR_FPB_TIMEO_INT 0x2
+#define ERR_WFIFO_OVF_INT 0x3
+#define ERR_RFIFO_OVF_INT 0x4
+#define ERR_WR_TIMEO_INT 0x5
+#define ERR_RD_TIMEO_INT 0x6
+#define ERR_WR_ERR_INT 0x7
+#define ERR_RD_ERR_INT 0x8
+#define ERR_BAD_DESC_INT 0x9
+#define ERR_DESC_DST_INT 0xA
+#define ERR_DESC_SRC_INT 0xB
+
+/* X-Gene DMA flyby operation code */
+#define FLYBY_2SRC_XOR 0x8
+#define FLYBY_3SRC_XOR 0x9
+#define FLYBY_4SRC_XOR 0xA
+#define FLYBY_5SRC_XOR 0xB
+
+/* X-Gene DMA SW descriptor flags */
+#define XGENE_DMA_FLAG_64B_DESC BIT(0)
+
+/* Define to dump X-Gene DMA descriptor */
+#define XGENE_DMA_DESC_DUMP(desc, m) \
+ print_hex_dump(KERN_ERR, (m), \
+ DUMP_PREFIX_ADDRESS, 16, 8, (desc), 32, 0)
+
+#define to_dma_desc_sw(tx) \
+ container_of(tx, struct xgene_dma_desc_sw, tx)
+#define to_dma_chan(dchan) \
+ container_of(dchan, struct xgene_dma_chan, dma_chan)
+
+#define chan_dbg(chan, fmt, arg...) \
+ dev_dbg(chan->dev, "%s: " fmt, chan->name, ##arg)
+#define chan_err(chan, fmt, arg...) \
+ dev_err(chan->dev, "%s: " fmt, chan->name, ##arg)
+
+struct xgene_dma_desc_hw {
+ u64 m0;
+ u64 m1;
+ u64 m2;
+ u64 m3;
+};
+
+enum xgene_dma_ring_cfgsize {
+ XGENE_DMA_RING_CFG_SIZE_512B,
+ XGENE_DMA_RING_CFG_SIZE_2KB,
+ XGENE_DMA_RING_CFG_SIZE_16KB,
+ XGENE_DMA_RING_CFG_SIZE_64KB,
+ XGENE_DMA_RING_CFG_SIZE_512KB,
+ XGENE_DMA_RING_CFG_SIZE_INVALID
+};
+
+struct xgene_dma_ring {
+ struct xgene_dma *pdma;
+ u8 buf_num;
+ u16 id;
+ u16 num;
+ u16 head;
+ u16 owner;
+ u16 slots;
+ u16 dst_ring_num;
+ u32 size;
+ void __iomem *cmd;
+ void __iomem *cmd_base;
+ dma_addr_t desc_paddr;
+ u32 state[XGENE_DMA_RING_NUM_CONFIG];
+ enum xgene_dma_ring_cfgsize cfgsize;
+ union {
+ void *desc_vaddr;
+ struct xgene_dma_desc_hw *desc_hw;
+ };
+};
+
+struct xgene_dma_desc_sw {
+ struct xgene_dma_desc_hw desc1;
+ struct xgene_dma_desc_hw desc2;
+ u32 flags;
+ struct list_head node;
+ struct list_head tx_list;
+ struct dma_async_tx_descriptor tx;
+};
+
+/**
+ * struct xgene_dma_chan - internal representation of an X-Gene DMA channel
+ * @dma_chan: dmaengine channel object member
+ * @pdma: X-Gene DMA device structure reference
+ * @dev: struct device reference for dma mapping api
+ * @id: raw id of this channel
+ * @rx_irq: channel IRQ
+ * @name: name of X-Gene DMA channel
+ * @lock: serializes enqueue/dequeue operations to the descriptor pool
+ * @pending: number of transaction request pushed to DMA controller for
+ * execution, but still waiting for completion,
+ * @max_outstanding: max number of outstanding request we can push to channel
+ * @ld_pending: descriptors which are queued to run, but have not yet been
+ * submitted to the hardware for execution
+ * @ld_running: descriptors which are currently being executing by the hardware
+ * @ld_completed: descriptors which have finished execution by the hardware.
+ * These descriptors have already had their cleanup actions run. They
+ * are waiting for the ACK bit to be set by the async tx API.
+ * @desc_pool: descriptor pool for DMA operations
+ * @tasklet: bottom half where all completed descriptors cleans
+ * @tx_ring: transmit ring descriptor that we use to prepare actual
+ * descriptors for further executions
+ * @rx_ring: receive ring descriptor that we use to get completed DMA
+ * descriptors during cleanup time
+ */
+struct xgene_dma_chan {
+ struct dma_chan dma_chan;
+ struct xgene_dma *pdma;
+ struct device *dev;
+ int id;
+ int rx_irq;
+ char name[10];
+ spinlock_t lock;
+ int pending;
+ int max_outstanding;
+ struct list_head ld_pending;
+ struct list_head ld_running;
+ struct list_head ld_completed;
+ struct dma_pool *desc_pool;
+ struct tasklet_struct tasklet;
+ struct xgene_dma_ring tx_ring;
+ struct xgene_dma_ring rx_ring;
+};
+
+/**
+ * struct xgene_dma - internal representation of an X-Gene DMA device
+ * @err_irq: DMA error irq number
+ * @ring_num: start id number for DMA ring
+ * @csr_dma: base for DMA register access
+ * @csr_ring: base for DMA ring register access
+ * @csr_ring_cmd: base for DMA ring command register access
+ * @csr_efuse: base for efuse register access
+ * @dma_dev: embedded struct dma_device
+ * @chan: reference to X-Gene DMA channels
+ */
+struct xgene_dma {
+ struct device *dev;
+ struct clk *clk;
+ int err_irq;
+ int ring_num;
+ void __iomem *csr_dma;
+ void __iomem *csr_ring;
+ void __iomem *csr_ring_cmd;
+ void __iomem *csr_efuse;
+ struct dma_device dma_dev[XGENE_DMA_MAX_CHANNEL];
+ struct xgene_dma_chan chan[XGENE_DMA_MAX_CHANNEL];
+};
+
+static const char * const xgene_dma_desc_err[] = {
+ [ERR_DESC_AXI] = "AXI error when reading src/dst link list",
+ [ERR_BAD_DESC] = "ERR or El_ERR fields not set to zero in desc",
+ [ERR_READ_DATA_AXI] = "AXI error when reading data",
+ [ERR_WRITE_DATA_AXI] = "AXI error when writing data",
+ [ERR_FBP_TIMEOUT] = "Timeout on bufpool fetch",
+ [ERR_ECC] = "ECC double bit error",
+ [ERR_DIFF_SIZE] = "Bufpool too small to hold all the DIF result",
+ [ERR_SCT_GAT_LEN] = "Gather and scatter data length not same",
+ [ERR_CRC_ERR] = "CRC error",
+ [ERR_CHKSUM] = "Checksum error",
+ [ERR_DIF] = "DIF error",
+};
+
+static const char * const xgene_dma_err[] = {
+ [ERR_DIF_SIZE_INT] = "DIF size error",
+ [ERR_GS_ERR_INT] = "Gather scatter not same size error",
+ [ERR_FPB_TIMEO_INT] = "Free pool time out error",
+ [ERR_WFIFO_OVF_INT] = "Write FIFO over flow error",
+ [ERR_RFIFO_OVF_INT] = "Read FIFO over flow error",
+ [ERR_WR_TIMEO_INT] = "Write time out error",
+ [ERR_RD_TIMEO_INT] = "Read time out error",
+ [ERR_WR_ERR_INT] = "HBF bus write error",
+ [ERR_RD_ERR_INT] = "HBF bus read error",
+ [ERR_BAD_DESC_INT] = "Ring descriptor HE0 not set error",
+ [ERR_DESC_DST_INT] = "HFB reading dst link address error",
+ [ERR_DESC_SRC_INT] = "HFB reading src link address error",
+};
+
+static bool is_pq_enabled(struct xgene_dma *pdma)
+{
+ u32 val;
+
+ val = ioread32(pdma->csr_efuse + XGENE_SOC_JTAG1_SHADOW);
+ return !(val & XGENE_DMA_PQ_DISABLE_MASK);
+}
+
+static void xgene_dma_cpu_to_le64(u64 *desc, int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ desc[i] = cpu_to_le64(desc[i]);
+}
+
+static u16 xgene_dma_encode_len(u32 len)
+{
+ return (len < XGENE_DMA_MAX_BYTE_CNT) ?
+ len : XGENE_DMA_16K_BUFFER_LEN_CODE;
+}
+
+static u8 xgene_dma_encode_xor_flyby(u32 src_cnt)
+{
+ static u8 flyby_type[] = {
+ FLYBY_2SRC_XOR, /* Dummy */
+ FLYBY_2SRC_XOR, /* Dummy */
+ FLYBY_2SRC_XOR,
+ FLYBY_3SRC_XOR,
+ FLYBY_4SRC_XOR,
+ FLYBY_5SRC_XOR
+ };
+
+ return flyby_type[src_cnt];
+}
+
+static u32 xgene_dma_ring_desc_cnt(struct xgene_dma_ring *ring)
+{
+ u32 __iomem *cmd_base = ring->cmd_base;
+ u32 ring_state = ioread32(&cmd_base[1]);
+
+ return XGENE_DMA_RING_DESC_CNT(ring_state);
+}
+
+static void xgene_dma_set_src_buffer(void *ext8, size_t *len,
+ dma_addr_t *paddr)
+{
+ size_t nbytes = (*len < XGENE_DMA_MAX_BYTE_CNT) ?
+ *len : XGENE_DMA_MAX_BYTE_CNT;
+
+ XGENE_DMA_DESC_BUFADDR_SET(ext8, *paddr);
+ XGENE_DMA_DESC_BUFLEN_SET(ext8, xgene_dma_encode_len(nbytes));
+ *len -= nbytes;
+ *paddr += nbytes;
+}
+
+static void xgene_dma_invalidate_buffer(void *ext8)
+{
+ XGENE_DMA_DESC_BUFLEN_SET(ext8, XGENE_DMA_INVALID_LEN_CODE);
+}
+
+static void *xgene_dma_lookup_ext8(u64 *desc, int idx)
+{
+ return (idx % 2) ? (desc + idx - 1) : (desc + idx + 1);
+}
+
+static void xgene_dma_init_desc(void *desc, u16 dst_ring_num)
+{
+ XGENE_DMA_DESC_C_SET(desc); /* Coherent IO */
+ XGENE_DMA_DESC_IN_SET(desc);
+ XGENE_DMA_DESC_H0ENQ_NUM_SET(desc, dst_ring_num);
+ XGENE_DMA_DESC_RTYPE_SET(desc, XGENE_DMA_RING_OWNER_DMA);
+}
+
+static void xgene_dma_prep_cpy_desc(struct xgene_dma_chan *chan,
+ struct xgene_dma_desc_sw *desc_sw,
+ dma_addr_t dst, dma_addr_t src,
+ size_t len)
+{
+ void *desc1, *desc2;
+ int i;
+
+ /* Get 1st descriptor */
+ desc1 = &desc_sw->desc1;
+ xgene_dma_init_desc(desc1, chan->tx_ring.dst_ring_num);
+
+ /* Set destination address */
+ XGENE_DMA_DESC_DR_SET(desc1);
+ XGENE_DMA_DESC_DST_ADDR_SET(desc1, dst);
+
+ /* Set 1st source address */
+ xgene_dma_set_src_buffer(desc1 + 8, &len, &src);
+
+ if (len <= 0) {
+ desc2 = NULL;
+ goto skip_additional_src;
+ }
+
+ /*
+ * We need to split this source buffer,
+ * and need to use 2nd descriptor
+ */
+ desc2 = &desc_sw->desc2;
+ XGENE_DMA_DESC_NV_SET(desc1);
+
+ /* Set 2nd to 5th source address */
+ for (i = 0; i < 4 && len; i++)
+ xgene_dma_set_src_buffer(xgene_dma_lookup_ext8(desc2, i),
+ &len, &src);
+
+ /* Invalidate unused source address field */
+ for (; i < 4; i++)
+ xgene_dma_invalidate_buffer(xgene_dma_lookup_ext8(desc2, i));
+
+ /* Updated flag that we have prepared 64B descriptor */
+ desc_sw->flags |= XGENE_DMA_FLAG_64B_DESC;
+
+skip_additional_src:
+ /* Hardware stores descriptor in little endian format */
+ xgene_dma_cpu_to_le64(desc1, 4);
+ if (desc2)
+ xgene_dma_cpu_to_le64(desc2, 4);
+}
+
+static void xgene_dma_prep_xor_desc(struct xgene_dma_chan *chan,
+ struct xgene_dma_desc_sw *desc_sw,
+ dma_addr_t *dst, dma_addr_t *src,
+ u32 src_cnt, size_t *nbytes,
+ const u8 *scf)
+{
+ void *desc1, *desc2;
+ size_t len = *nbytes;
+ int i;
+
+ desc1 = &desc_sw->desc1;
+ desc2 = &desc_sw->desc2;
+
+ /* Initialize DMA descriptor */
+ xgene_dma_init_desc(desc1, chan->tx_ring.dst_ring_num);
+
+ /* Set destination address */
+ XGENE_DMA_DESC_DR_SET(desc1);
+ XGENE_DMA_DESC_DST_ADDR_SET(desc1, *dst);
+
+ /* We have multiple source addresses, so need to set NV bit*/
+ XGENE_DMA_DESC_NV_SET(desc1);
+
+ /* Set flyby opcode */
+ XGENE_DMA_DESC_FLYBY_SET(desc1, xgene_dma_encode_xor_flyby(src_cnt));
+
+ /* Set 1st to 5th source addresses */
+ for (i = 0; i < src_cnt; i++) {
+ len = *nbytes;
+ xgene_dma_set_src_buffer((i == 0) ? (desc1 + 8) :
+ xgene_dma_lookup_ext8(desc2, i - 1),
+ &len, &src[i]);
+ XGENE_DMA_DESC_MULTI_SET(desc1, scf[i], i);
+ }
+
+ /* Hardware stores descriptor in little endian format */
+ xgene_dma_cpu_to_le64(desc1, 4);
+ xgene_dma_cpu_to_le64(desc2, 4);
+
+ /* Update meta data */
+ *nbytes = len;
+ *dst += XGENE_DMA_MAX_BYTE_CNT;
+
+ /* We need always 64B descriptor to perform xor or pq operations */
+ desc_sw->flags |= XGENE_DMA_FLAG_64B_DESC;
+}
+
+static dma_cookie_t xgene_dma_tx_submit(struct dma_async_tx_descriptor *tx)
+{
+ struct xgene_dma_desc_sw *desc;
+ struct xgene_dma_chan *chan;
+ dma_cookie_t cookie;
+
+ if (unlikely(!tx))
+ return -EINVAL;
+
+ chan = to_dma_chan(tx->chan);
+ desc = to_dma_desc_sw(tx);
+
+ spin_lock_bh(&chan->lock);
+
+ cookie = dma_cookie_assign(tx);
+
+ /* Add this transaction list onto the tail of the pending queue */
+ list_splice_tail_init(&desc->tx_list, &chan->ld_pending);
+
+ spin_unlock_bh(&chan->lock);
+
+ return cookie;
+}
+
+static void xgene_dma_clean_descriptor(struct xgene_dma_chan *chan,
+ struct xgene_dma_desc_sw *desc)
+{
+ list_del(&desc->node);
+ chan_dbg(chan, "LD %p free\n", desc);
+ dma_pool_free(chan->desc_pool, desc, desc->tx.phys);
+}
+
+static struct xgene_dma_desc_sw *xgene_dma_alloc_descriptor(
+ struct xgene_dma_chan *chan)
+{
+ struct xgene_dma_desc_sw *desc;
+ dma_addr_t phys;
+
+ desc = dma_pool_alloc(chan->desc_pool, GFP_NOWAIT, &phys);
+ if (!desc) {
+ chan_err(chan, "Failed to allocate LDs\n");
+ return NULL;
+ }
+
+ memset(desc, 0, sizeof(*desc));
+
+ INIT_LIST_HEAD(&desc->tx_list);
+ desc->tx.phys = phys;
+ desc->tx.tx_submit = xgene_dma_tx_submit;
+ dma_async_tx_descriptor_init(&desc->tx, &chan->dma_chan);
+
+ chan_dbg(chan, "LD %p allocated\n", desc);
+
+ return desc;
+}
+
+/**
+ * xgene_dma_clean_completed_descriptor - free all descriptors which
+ * has been completed and acked
+ * @chan: X-Gene DMA channel
+ *
+ * This function is used on all completed and acked descriptors.
+ */
+static void xgene_dma_clean_completed_descriptor(struct xgene_dma_chan *chan)
+{
+ struct xgene_dma_desc_sw *desc, *_desc;
+
+ /* Run the callback for each descriptor, in order */
+ list_for_each_entry_safe(desc, _desc, &chan->ld_completed, node) {
+ if (async_tx_test_ack(&desc->tx))
+ xgene_dma_clean_descriptor(chan, desc);
+ }
+}
+
+/**
+ * xgene_dma_run_tx_complete_actions - cleanup a single link descriptor
+ * @chan: X-Gene DMA channel
+ * @desc: descriptor to cleanup and free
+ *
+ * This function is used on a descriptor which has been executed by the DMA
+ * controller. It will run any callbacks, submit any dependencies.
+ */
+static void xgene_dma_run_tx_complete_actions(struct xgene_dma_chan *chan,
+ struct xgene_dma_desc_sw *desc)
+{
+ struct dma_async_tx_descriptor *tx = &desc->tx;
+
+ /*
+ * If this is not the last transaction in the group,
+ * then no need to complete cookie and run any callback as
+ * this is not the tx_descriptor which had been sent to caller
+ * of this DMA request
+ */
+
+ if (tx->cookie == 0)
+ return;
+
+ dma_cookie_complete(tx);
+
+ /* Run the link descriptor callback function */
+ if (tx->callback)
+ tx->callback(tx->callback_param);
+
+ dma_descriptor_unmap(tx);
+
+ /* Run any dependencies */
+ dma_run_dependencies(tx);
+}
+
+/**
+ * xgene_dma_clean_running_descriptor - move the completed descriptor from
+ * ld_running to ld_completed
+ * @chan: X-Gene DMA channel
+ * @desc: the descriptor which is completed
+ *
+ * Free the descriptor directly if acked by async_tx api,
+ * else move it to queue ld_completed.
+ */
+static void xgene_dma_clean_running_descriptor(struct xgene_dma_chan *chan,
+ struct xgene_dma_desc_sw *desc)
+{
+ /* Remove from the list of running transactions */
+ list_del(&desc->node);
+
+ /*
+ * the client is allowed to attach dependent operations
+ * until 'ack' is set
+ */
+ if (!async_tx_test_ack(&desc->tx)) {
+ /*
+ * Move this descriptor to the list of descriptors which is
+ * completed, but still awaiting the 'ack' bit to be set.
+ */
+ list_add_tail(&desc->node, &chan->ld_completed);
+ return;
+ }
+
+ chan_dbg(chan, "LD %p free\n", desc);
+ dma_pool_free(chan->desc_pool, desc, desc->tx.phys);
+}
+
+static int xgene_chan_xfer_request(struct xgene_dma_ring *ring,
+ struct xgene_dma_desc_sw *desc_sw)
+{
+ struct xgene_dma_desc_hw *desc_hw;
+
+ /* Check if can push more descriptor to hw for execution */
+ if (xgene_dma_ring_desc_cnt(ring) > (ring->slots - 2))
+ return -EBUSY;
+
+ /* Get hw descriptor from DMA tx ring */
+ desc_hw = &ring->desc_hw[ring->head];
+
+ /*
+ * Increment the head count to point next
+ * descriptor for next time
+ */
+ if (++ring->head == ring->slots)
+ ring->head = 0;
+
+ /* Copy prepared sw descriptor data to hw descriptor */
+ memcpy(desc_hw, &desc_sw->desc1, sizeof(*desc_hw));
+
+ /*
+ * Check if we have prepared 64B descriptor,
+ * in this case we need one more hw descriptor
+ */
+ if (desc_sw->flags & XGENE_DMA_FLAG_64B_DESC) {
+ desc_hw = &ring->desc_hw[ring->head];
+
+ if (++ring->head == ring->slots)
+ ring->head = 0;
+
+ memcpy(desc_hw, &desc_sw->desc2, sizeof(*desc_hw));
+ }
+
+ /* Notify the hw that we have descriptor ready for execution */
+ iowrite32((desc_sw->flags & XGENE_DMA_FLAG_64B_DESC) ?
+ 2 : 1, ring->cmd);
+
+ return 0;
+}
+
+/**
+ * xgene_chan_xfer_ld_pending - push any pending transactions to hw
+ * @chan : X-Gene DMA channel
+ *
+ * LOCKING: must hold chan->desc_lock
+ */
+static void xgene_chan_xfer_ld_pending(struct xgene_dma_chan *chan)
+{
+ struct xgene_dma_desc_sw *desc_sw, *_desc_sw;
+ int ret;
+
+ /*
+ * If the list of pending descriptors is empty, then we
+ * don't need to do any work at all
+ */
+ if (list_empty(&chan->ld_pending)) {
+ chan_dbg(chan, "No pending LDs\n");
+ return;
+ }
+
+ /*
+ * Move elements from the queue of pending transactions onto the list
+ * of running transactions and push it to hw for further executions
+ */
+ list_for_each_entry_safe(desc_sw, _desc_sw, &chan->ld_pending, node) {
+ /*
+ * Check if have pushed max number of transactions to hw
+ * as capable, so let's stop here and will push remaining
+ * elements from pening ld queue after completing some
+ * descriptors that we have already pushed
+ */
+ if (chan->pending >= chan->max_outstanding)
+ return;
+
+ ret = xgene_chan_xfer_request(&chan->tx_ring, desc_sw);
+ if (ret)
+ return;
+
+ /*
+ * Delete this element from ld pending queue and append it to
+ * ld running queue
+ */
+ list_move_tail(&desc_sw->node, &chan->ld_running);
+
+ /* Increment the pending transaction count */
+ chan->pending++;
+ }
+}
+
+/**
+ * xgene_dma_cleanup_descriptors - cleanup link descriptors which are completed
+ * and move them to ld_completed to free until flag 'ack' is set
+ * @chan: X-Gene DMA channel
+ *
+ * This function is used on descriptors which have been executed by the DMA
+ * controller. It will run any callbacks, submit any dependencies, then
+ * free these descriptors if flag 'ack' is set.
+ */
+static void xgene_dma_cleanup_descriptors(struct xgene_dma_chan *chan)
+{
+ struct xgene_dma_ring *ring = &chan->rx_ring;
+ struct xgene_dma_desc_sw *desc_sw, *_desc_sw;
+ struct xgene_dma_desc_hw *desc_hw;
+ u8 status;
+
+ /* Clean already completed and acked descriptors */
+ xgene_dma_clean_completed_descriptor(chan);
+
+ /* Run the callback for each descriptor, in order */
+ list_for_each_entry_safe(desc_sw, _desc_sw, &chan->ld_running, node) {
+ /* Get subsequent hw descriptor from DMA rx ring */
+ desc_hw = &ring->desc_hw[ring->head];
+
+ /* Check if this descriptor has been completed */
+ if (unlikely(XGENE_DMA_DESC_IS_EMPTY(desc_hw)))
+ break;
+
+ if (++ring->head == ring->slots)
+ ring->head = 0;
+
+ /* Check if we have any error with DMA transactions */
+ status = XGENE_DMA_DESC_STATUS(
+ XGENE_DMA_DESC_ELERR_RD(le64_to_cpu(
+ desc_hw->m0)),
+ XGENE_DMA_DESC_LERR_RD(le64_to_cpu(
+ desc_hw->m0)));
+ if (status) {
+ /* Print the DMA error type */
+ chan_err(chan, "%s\n", xgene_dma_desc_err[status]);
+
+ /*
+ * We have DMA transactions error here. Dump DMA Tx
+ * and Rx descriptors for this request */
+ XGENE_DMA_DESC_DUMP(&desc_sw->desc1,
+ "X-Gene DMA TX DESC1: ");
+
+ if (desc_sw->flags & XGENE_DMA_FLAG_64B_DESC)
+ XGENE_DMA_DESC_DUMP(&desc_sw->desc2,
+ "X-Gene DMA TX DESC2: ");
+
+ XGENE_DMA_DESC_DUMP(desc_hw,
+ "X-Gene DMA RX ERR DESC: ");
+ }
+
+ /* Notify the hw about this completed descriptor */
+ iowrite32(-1, ring->cmd);
+
+ /* Mark this hw descriptor as processed */
+ XGENE_DMA_DESC_SET_EMPTY(desc_hw);
+
+ xgene_dma_run_tx_complete_actions(chan, desc_sw);
+
+ xgene_dma_clean_running_descriptor(chan, desc_sw);
+
+ /*
+ * Decrement the pending transaction count
+ * as we have processed one
+ */
+ chan->pending--;
+ }
+
+ /*
+ * Start any pending transactions automatically
+ * In the ideal case, we keep the DMA controller busy while we go
+ * ahead and free the descriptors below.
+ */
+ xgene_chan_xfer_ld_pending(chan);
+}
+
+static int xgene_dma_alloc_chan_resources(struct dma_chan *dchan)
+{
+ struct xgene_dma_chan *chan = to_dma_chan(dchan);
+
+ /* Has this channel already been allocated? */
+ if (chan->desc_pool)
+ return 1;
+
+ chan->desc_pool = dma_pool_create(chan->name, chan->dev,
+ sizeof(struct xgene_dma_desc_sw),
+ 0, 0);
+ if (!chan->desc_pool) {
+ chan_err(chan, "Failed to allocate descriptor pool\n");
+ return -ENOMEM;
+ }
+
+ chan_dbg(chan, "Allocate descripto pool\n");
+
+ return 1;
+}
+
+/**
+ * xgene_dma_free_desc_list - Free all descriptors in a queue
+ * @chan: X-Gene DMA channel
+ * @list: the list to free
+ *
+ * LOCKING: must hold chan->desc_lock
+ */
+static void xgene_dma_free_desc_list(struct xgene_dma_chan *chan,
+ struct list_head *list)
+{
+ struct xgene_dma_desc_sw *desc, *_desc;
+
+ list_for_each_entry_safe(desc, _desc, list, node)
+ xgene_dma_clean_descriptor(chan, desc);
+}
+
+static void xgene_dma_free_tx_desc_list(struct xgene_dma_chan *chan,
+ struct list_head *list)
+{
+ struct xgene_dma_desc_sw *desc, *_desc;
+
+ list_for_each_entry_safe(desc, _desc, list, node)
+ xgene_dma_clean_descriptor(chan, desc);
+}
+
+static void xgene_dma_free_chan_resources(struct dma_chan *dchan)
+{
+ struct xgene_dma_chan *chan = to_dma_chan(dchan);
+
+ chan_dbg(chan, "Free all resources\n");
+
+ if (!chan->desc_pool)
+ return;
+
+ spin_lock_bh(&chan->lock);
+
+ /* Process all running descriptor */
+ xgene_dma_cleanup_descriptors(chan);
+
+ /* Clean all link descriptor queues */
+ xgene_dma_free_desc_list(chan, &chan->ld_pending);
+ xgene_dma_free_desc_list(chan, &chan->ld_running);
+ xgene_dma_free_desc_list(chan, &chan->ld_completed);
+
+ spin_unlock_bh(&chan->lock);
+
+ /* Delete this channel DMA pool */
+ dma_pool_destroy(chan->desc_pool);
+ chan->desc_pool = NULL;
+}
+
+static struct dma_async_tx_descriptor *xgene_dma_prep_memcpy(
+ struct dma_chan *dchan, dma_addr_t dst, dma_addr_t src,
+ size_t len, unsigned long flags)
+{
+ struct xgene_dma_desc_sw *first = NULL, *new;
+ struct xgene_dma_chan *chan;
+ size_t copy;
+
+ if (unlikely(!dchan || !len))
+ return NULL;
+
+ chan = to_dma_chan(dchan);
+
+ do {
+ /* Allocate the link descriptor from DMA pool */
+ new = xgene_dma_alloc_descriptor(chan);
+ if (!new)
+ goto fail;
+
+ /* Create the largest transaction possible */
+ copy = min_t(size_t, len, XGENE_DMA_MAX_64B_DESC_BYTE_CNT);
+
+ /* Prepare DMA descriptor */
+ xgene_dma_prep_cpy_desc(chan, new, dst, src, copy);
+
+ if (!first)
+ first = new;
+
+ new->tx.cookie = 0;
+ async_tx_ack(&new->tx);
+
+ /* Update metadata */
+ len -= copy;
+ dst += copy;
+ src += copy;
+
+ /* Insert the link descriptor to the LD ring */
+ list_add_tail(&new->node, &first->tx_list);
+ } while (len);
+
+ new->tx.flags = flags; /* client is in control of this ack */
+ new->tx.cookie = -EBUSY;
+ list_splice(&first->tx_list, &new->tx_list);
+
+ return &new->tx;
+
+fail:
+ if (!first)
+ return NULL;
+
+ xgene_dma_free_tx_desc_list(chan, &first->tx_list);
+ return NULL;
+}
+
+static struct dma_async_tx_descriptor *xgene_dma_prep_sg(
+ struct dma_chan *dchan, struct scatterlist *dst_sg,
+ u32 dst_nents, struct scatterlist *src_sg,
+ u32 src_nents, unsigned long flags)
+{
+ struct xgene_dma_desc_sw *first = NULL, *new = NULL;
+ struct xgene_dma_chan *chan;
+ size_t dst_avail, src_avail;
+ dma_addr_t dst, src;
+ size_t len;
+
+ if (unlikely(!dchan))
+ return NULL;
+
+ if (unlikely(!dst_nents || !src_nents))
+ return NULL;
+
+ if (unlikely(!dst_sg || !src_sg))
+ return NULL;
+
+ chan = to_dma_chan(dchan);
+
+ /* Get prepared for the loop */
+ dst_avail = sg_dma_len(dst_sg);
+ src_avail = sg_dma_len(src_sg);
+ dst_nents--;
+ src_nents--;
+
+ /* Run until we are out of scatterlist entries */
+ while (true) {
+ /* Create the largest transaction possible */
+ len = min_t(size_t, src_avail, dst_avail);
+ len = min_t(size_t, len, XGENE_DMA_MAX_64B_DESC_BYTE_CNT);
+ if (len == 0)
+ goto fetch;
+
+ dst = sg_dma_address(dst_sg) + sg_dma_len(dst_sg) - dst_avail;
+ src = sg_dma_address(src_sg) + sg_dma_len(src_sg) - src_avail;
+
+ /* Allocate the link descriptor from DMA pool */
+ new = xgene_dma_alloc_descriptor(chan);
+ if (!new)
+ goto fail;
+
+ /* Prepare DMA descriptor */
+ xgene_dma_prep_cpy_desc(chan, new, dst, src, len);
+
+ if (!first)
+ first = new;
+
+ new->tx.cookie = 0;
+ async_tx_ack(&new->tx);
+
+ /* update metadata */
+ dst_avail -= len;
+ src_avail -= len;
+
+ /* Insert the link descriptor to the LD ring */
+ list_add_tail(&new->node, &first->tx_list);
+
+fetch:
+ /* fetch the next dst scatterlist entry */
+ if (dst_avail == 0) {
+ /* no more entries: we're done */
+ if (dst_nents == 0)
+ break;
+
+ /* fetch the next entry: if there are no more: done */
+ dst_sg = sg_next(dst_sg);
+ if (!dst_sg)
+ break;
+
+ dst_nents--;
+ dst_avail = sg_dma_len(dst_sg);
+ }
+
+ /* fetch the next src scatterlist entry */
+ if (src_avail == 0) {
+ /* no more entries: we're done */
+ if (src_nents == 0)
+ break;
+
+ /* fetch the next entry: if there are no more: done */
+ src_sg = sg_next(src_sg);
+ if (!src_sg)
+ break;
+
+ src_nents--;
+ src_avail = sg_dma_len(src_sg);
+ }
+ }
+
+ if (!new)
+ return NULL;
+
+ new->tx.flags = flags; /* client is in control of this ack */
+ new->tx.cookie = -EBUSY;
+ list_splice(&first->tx_list, &new->tx_list);
+
+ return &new->tx;
+fail:
+ if (!first)
+ return NULL;
+
+ xgene_dma_free_tx_desc_list(chan, &first->tx_list);
+ return NULL;
+}
+
+static struct dma_async_tx_descriptor *xgene_dma_prep_xor(
+ struct dma_chan *dchan, dma_addr_t dst, dma_addr_t *src,
+ u32 src_cnt, size_t len, unsigned long flags)
+{
+ struct xgene_dma_desc_sw *first = NULL, *new;
+ struct xgene_dma_chan *chan;
+ static u8 multi[XGENE_DMA_MAX_XOR_SRC] = {
+ 0x01, 0x01, 0x01, 0x01, 0x01};
+
+ if (unlikely(!dchan || !len))
+ return NULL;
+
+ chan = to_dma_chan(dchan);
+
+ do {
+ /* Allocate the link descriptor from DMA pool */
+ new = xgene_dma_alloc_descriptor(chan);
+ if (!new)
+ goto fail;
+
+ /* Prepare xor DMA descriptor */
+ xgene_dma_prep_xor_desc(chan, new, &dst, src,
+ src_cnt, &len, multi);
+
+ if (!first)
+ first = new;
+
+ new->tx.cookie = 0;
+ async_tx_ack(&new->tx);
+
+ /* Insert the link descriptor to the LD ring */
+ list_add_tail(&new->node, &first->tx_list);
+ } while (len);
+
+ new->tx.flags = flags; /* client is in control of this ack */
+ new->tx.cookie = -EBUSY;
+ list_splice(&first->tx_list, &new->tx_list);
+
+ return &new->tx;
+
+fail:
+ if (!first)
+ return NULL;
+
+ xgene_dma_free_tx_desc_list(chan, &first->tx_list);
+ return NULL;
+}
+
+static struct dma_async_tx_descriptor *xgene_dma_prep_pq(
+ struct dma_chan *dchan, dma_addr_t *dst, dma_addr_t *src,
+ u32 src_cnt, const u8 *scf, size_t len, unsigned long flags)
+{
+ struct xgene_dma_desc_sw *first = NULL, *new;
+ struct xgene_dma_chan *chan;
+ size_t _len = len;
+ dma_addr_t _src[XGENE_DMA_MAX_XOR_SRC];
+ static u8 multi[XGENE_DMA_MAX_XOR_SRC] = {0x01, 0x01, 0x01, 0x01, 0x01};
+
+ if (unlikely(!dchan || !len))
+ return NULL;
+
+ chan = to_dma_chan(dchan);
+
+ /*
+ * Save source addresses on local variable, may be we have to
+ * prepare two descriptor to generate P and Q if both enabled
+ * in the flags by client
+ */
+ memcpy(_src, src, sizeof(*src) * src_cnt);
+
+ if (flags & DMA_PREP_PQ_DISABLE_P)
+ len = 0;
+
+ if (flags & DMA_PREP_PQ_DISABLE_Q)
+ _len = 0;
+
+ do {
+ /* Allocate the link descriptor from DMA pool */
+ new = xgene_dma_alloc_descriptor(chan);
+ if (!new)
+ goto fail;
+
+ if (!first)
+ first = new;
+
+ new->tx.cookie = 0;
+ async_tx_ack(&new->tx);
+
+ /* Insert the link descriptor to the LD ring */
+ list_add_tail(&new->node, &first->tx_list);
+
+ /*
+ * Prepare DMA descriptor to generate P,
+ * if DMA_PREP_PQ_DISABLE_P flag is not set
+ */
+ if (len) {
+ xgene_dma_prep_xor_desc(chan, new, &dst[0], src,
+ src_cnt, &len, multi);
+ continue;
+ }
+
+ /*
+ * Prepare DMA descriptor to generate Q,
+ * if DMA_PREP_PQ_DISABLE_Q flag is not set
+ */
+ if (_len) {
+ xgene_dma_prep_xor_desc(chan, new, &dst[1], _src,
+ src_cnt, &_len, scf);
+ }
+ } while (len || _len);
+
+ new->tx.flags = flags; /* client is in control of this ack */
+ new->tx.cookie = -EBUSY;
+ list_splice(&first->tx_list, &new->tx_list);
+
+ return &new->tx;
+
+fail:
+ if (!first)
+ return NULL;
+
+ xgene_dma_free_tx_desc_list(chan, &first->tx_list);
+ return NULL;
+}
+
+static void xgene_dma_issue_pending(struct dma_chan *dchan)
+{
+ struct xgene_dma_chan *chan = to_dma_chan(dchan);
+
+ spin_lock_bh(&chan->lock);
+ xgene_chan_xfer_ld_pending(chan);
+ spin_unlock_bh(&chan->lock);
+}
+
+static enum dma_status xgene_dma_tx_status(struct dma_chan *dchan,
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ return dma_cookie_status(dchan, cookie, txstate);
+}
+
+static void xgene_dma_tasklet_cb(unsigned long data)
+{
+ struct xgene_dma_chan *chan = (struct xgene_dma_chan *)data;
+
+ spin_lock_bh(&chan->lock);
+
+ /* Run all cleanup for descriptors which have been completed */
+ xgene_dma_cleanup_descriptors(chan);
+
+ /* Re-enable DMA channel IRQ */
+ enable_irq(chan->rx_irq);
+
+ spin_unlock_bh(&chan->lock);
+}
+
+static irqreturn_t xgene_dma_chan_ring_isr(int irq, void *id)
+{
+ struct xgene_dma_chan *chan = (struct xgene_dma_chan *)id;
+
+ BUG_ON(!chan);
+
+ /*
+ * Disable DMA channel IRQ until we process completed
+ * descriptors
+ */
+ disable_irq_nosync(chan->rx_irq);
+
+ /*
+ * Schedule the tasklet to handle all cleanup of the current
+ * transaction. It will start a new transaction if there is
+ * one pending.
+ */
+ tasklet_schedule(&chan->tasklet);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t xgene_dma_err_isr(int irq, void *id)
+{
+ struct xgene_dma *pdma = (struct xgene_dma *)id;
+ unsigned long int_mask;
+ u32 val, i;
+
+ val = ioread32(pdma->csr_dma + XGENE_DMA_INT);
+
+ /* Clear DMA interrupts */
+ iowrite32(val, pdma->csr_dma + XGENE_DMA_INT);
+
+ /* Print DMA error info */
+ int_mask = val >> XGENE_DMA_INT_MASK_SHIFT;
+ for_each_set_bit(i, &int_mask, ARRAY_SIZE(xgene_dma_err))
+ dev_err(pdma->dev,
+ "Interrupt status 0x%08X %s\n", val, xgene_dma_err[i]);
+
+ return IRQ_HANDLED;
+}
+
+static void xgene_dma_wr_ring_state(struct xgene_dma_ring *ring)
+{
+ int i;
+
+ iowrite32(ring->num, ring->pdma->csr_ring + XGENE_DMA_RING_STATE);
+
+ for (i = 0; i < XGENE_DMA_RING_NUM_CONFIG; i++)
+ iowrite32(ring->state[i], ring->pdma->csr_ring +
+ XGENE_DMA_RING_STATE_WR_BASE + (i * 4));
+}
+
+static void xgene_dma_clr_ring_state(struct xgene_dma_ring *ring)
+{
+ memset(ring->state, 0, sizeof(u32) * XGENE_DMA_RING_NUM_CONFIG);
+ xgene_dma_wr_ring_state(ring);
+}
+
+static void xgene_dma_setup_ring(struct xgene_dma_ring *ring)
+{
+ void *ring_cfg = ring->state;
+ u64 addr = ring->desc_paddr;
+ void *desc;
+ u32 i, val;
+
+ ring->slots = ring->size / XGENE_DMA_RING_WQ_DESC_SIZE;
+
+ /* Clear DMA ring state */
+ xgene_dma_clr_ring_state(ring);
+
+ /* Set DMA ring type */
+ XGENE_DMA_RING_TYPE_SET(ring_cfg, XGENE_DMA_RING_TYPE_REGULAR);
+
+ if (ring->owner == XGENE_DMA_RING_OWNER_DMA) {
+ /* Set recombination buffer and timeout */
+ XGENE_DMA_RING_RECOMBBUF_SET(ring_cfg);
+ XGENE_DMA_RING_RECOMTIMEOUTL_SET(ring_cfg);
+ XGENE_DMA_RING_RECOMTIMEOUTH_SET(ring_cfg);
+ }
+
+ /* Initialize DMA ring state */
+ XGENE_DMA_RING_SELTHRSH_SET(ring_cfg);
+ XGENE_DMA_RING_ACCEPTLERR_SET(ring_cfg);
+ XGENE_DMA_RING_COHERENT_SET(ring_cfg);
+ XGENE_DMA_RING_ADDRL_SET(ring_cfg, addr);
+ XGENE_DMA_RING_ADDRH_SET(ring_cfg, addr);
+ XGENE_DMA_RING_SIZE_SET(ring_cfg, ring->cfgsize);
+
+ /* Write DMA ring configurations */
+ xgene_dma_wr_ring_state(ring);
+
+ /* Set DMA ring id */
+ iowrite32(XGENE_DMA_RING_ID_SETUP(ring->id),
+ ring->pdma->csr_ring + XGENE_DMA_RING_ID);
+
+ /* Set DMA ring buffer */
+ iowrite32(XGENE_DMA_RING_ID_BUF_SETUP(ring->num),
+ ring->pdma->csr_ring + XGENE_DMA_RING_ID_BUF);
+
+ if (ring->owner != XGENE_DMA_RING_OWNER_CPU)
+ return;
+
+ /* Set empty signature to DMA Rx ring descriptors */
+ for (i = 0; i < ring->slots; i++) {
+ desc = &ring->desc_hw[i];
+ XGENE_DMA_DESC_SET_EMPTY(desc);
+ }
+
+ /* Enable DMA Rx ring interrupt */
+ val = ioread32(ring->pdma->csr_ring + XGENE_DMA_RING_NE_INT_MODE);
+ XGENE_DMA_RING_NE_INT_MODE_SET(val, ring->buf_num);
+ iowrite32(val, ring->pdma->csr_ring + XGENE_DMA_RING_NE_INT_MODE);
+}
+
+static void xgene_dma_clear_ring(struct xgene_dma_ring *ring)
+{
+ u32 ring_id, val;
+
+ if (ring->owner == XGENE_DMA_RING_OWNER_CPU) {
+ /* Disable DMA Rx ring interrupt */
+ val = ioread32(ring->pdma->csr_ring +
+ XGENE_DMA_RING_NE_INT_MODE);
+ XGENE_DMA_RING_NE_INT_MODE_RESET(val, ring->buf_num);
+ iowrite32(val, ring->pdma->csr_ring +
+ XGENE_DMA_RING_NE_INT_MODE);
+ }
+
+ /* Clear DMA ring state */
+ ring_id = XGENE_DMA_RING_ID_SETUP(ring->id);
+ iowrite32(ring_id, ring->pdma->csr_ring + XGENE_DMA_RING_ID);
+
+ iowrite32(0, ring->pdma->csr_ring + XGENE_DMA_RING_ID_BUF);
+ xgene_dma_clr_ring_state(ring);
+}
+
+static void xgene_dma_set_ring_cmd(struct xgene_dma_ring *ring)
+{
+ ring->cmd_base = ring->pdma->csr_ring_cmd +
+ XGENE_DMA_RING_CMD_BASE_OFFSET((ring->num -
+ XGENE_DMA_RING_NUM));
+
+ ring->cmd = ring->cmd_base + XGENE_DMA_RING_CMD_OFFSET;
+}
+
+static int xgene_dma_get_ring_size(struct xgene_dma_chan *chan,
+ enum xgene_dma_ring_cfgsize cfgsize)
+{
+ int size;
+
+ switch (cfgsize) {
+ case XGENE_DMA_RING_CFG_SIZE_512B:
+ size = 0x200;
+ break;
+ case XGENE_DMA_RING_CFG_SIZE_2KB:
+ size = 0x800;
+ break;
+ case XGENE_DMA_RING_CFG_SIZE_16KB:
+ size = 0x4000;
+ break;
+ case XGENE_DMA_RING_CFG_SIZE_64KB:
+ size = 0x10000;
+ break;
+ case XGENE_DMA_RING_CFG_SIZE_512KB:
+ size = 0x80000;
+ break;
+ default:
+ chan_err(chan, "Unsupported cfg ring size %d\n", cfgsize);
+ return -EINVAL;
+ }
+
+ return size;
+}
+
+static void xgene_dma_delete_ring_one(struct xgene_dma_ring *ring)
+{
+ /* Clear DMA ring configurations */
+ xgene_dma_clear_ring(ring);
+
+ /* De-allocate DMA ring descriptor */
+ if (ring->desc_vaddr) {
+ dma_free_coherent(ring->pdma->dev, ring->size,
+ ring->desc_vaddr, ring->desc_paddr);
+ ring->desc_vaddr = NULL;
+ }
+}
+
+static void xgene_dma_delete_chan_rings(struct xgene_dma_chan *chan)
+{
+ xgene_dma_delete_ring_one(&chan->rx_ring);
+ xgene_dma_delete_ring_one(&chan->tx_ring);
+}
+
+static int xgene_dma_create_ring_one(struct xgene_dma_chan *chan,
+ struct xgene_dma_ring *ring,
+ enum xgene_dma_ring_cfgsize cfgsize)
+{
+ /* Setup DMA ring descriptor variables */
+ ring->pdma = chan->pdma;
+ ring->cfgsize = cfgsize;
+ ring->num = chan->pdma->ring_num++;
+ ring->id = XGENE_DMA_RING_ID_GET(ring->owner, ring->buf_num);
+
+ ring->size = xgene_dma_get_ring_size(chan, cfgsize);
+ if (ring->size <= 0)
+ return ring->size;
+
+ /* Allocate memory for DMA ring descriptor */
+ ring->desc_vaddr = dma_zalloc_coherent(chan->dev, ring->size,
+ &ring->desc_paddr, GFP_KERNEL);
+ if (!ring->desc_vaddr) {
+ chan_err(chan, "Failed to allocate ring desc\n");
+ return -ENOMEM;
+ }
+
+ /* Configure and enable DMA ring */
+ xgene_dma_set_ring_cmd(ring);
+ xgene_dma_setup_ring(ring);
+
+ return 0;
+}
+
+static int xgene_dma_create_chan_rings(struct xgene_dma_chan *chan)
+{
+ struct xgene_dma_ring *rx_ring = &chan->rx_ring;
+ struct xgene_dma_ring *tx_ring = &chan->tx_ring;
+ int ret;
+
+ /* Create DMA Rx ring descriptor */
+ rx_ring->owner = XGENE_DMA_RING_OWNER_CPU;
+ rx_ring->buf_num = XGENE_DMA_CPU_BUFNUM + chan->id;
+
+ ret = xgene_dma_create_ring_one(chan, rx_ring,
+ XGENE_DMA_RING_CFG_SIZE_64KB);
+ if (ret)
+ return ret;
+
+ chan_dbg(chan, "Rx ring id 0x%X num %d desc 0x%p\n",
+ rx_ring->id, rx_ring->num, rx_ring->desc_vaddr);
+
+ /* Create DMA Tx ring descriptor */
+ tx_ring->owner = XGENE_DMA_RING_OWNER_DMA;
+ tx_ring->buf_num = XGENE_DMA_BUFNUM + chan->id;
+
+ ret = xgene_dma_create_ring_one(chan, tx_ring,
+ XGENE_DMA_RING_CFG_SIZE_64KB);
+ if (ret) {
+ xgene_dma_delete_ring_one(rx_ring);
+ return ret;
+ }
+
+ tx_ring->dst_ring_num = XGENE_DMA_RING_DST_ID(rx_ring->num);
+
+ chan_dbg(chan,
+ "Tx ring id 0x%X num %d desc 0x%p\n",
+ tx_ring->id, tx_ring->num, tx_ring->desc_vaddr);
+
+ /* Set the max outstanding request possible to this channel */
+ chan->max_outstanding = rx_ring->slots;
+
+ return ret;
+}
+
+static int xgene_dma_init_rings(struct xgene_dma *pdma)
+{
+ int ret, i, j;
+
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) {
+ ret = xgene_dma_create_chan_rings(&pdma->chan[i]);
+ if (ret) {
+ for (j = 0; j < i; j++)
+ xgene_dma_delete_chan_rings(&pdma->chan[j]);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static void xgene_dma_enable(struct xgene_dma *pdma)
+{
+ u32 val;
+
+ /* Configure and enable DMA engine */
+ val = ioread32(pdma->csr_dma + XGENE_DMA_GCR);
+ XGENE_DMA_CH_SETUP(val);
+ XGENE_DMA_ENABLE(val);
+ iowrite32(val, pdma->csr_dma + XGENE_DMA_GCR);
+}
+
+static void xgene_dma_disable(struct xgene_dma *pdma)
+{
+ u32 val;
+
+ val = ioread32(pdma->csr_dma + XGENE_DMA_GCR);
+ XGENE_DMA_DISABLE(val);
+ iowrite32(val, pdma->csr_dma + XGENE_DMA_GCR);
+}
+
+static void xgene_dma_mask_interrupts(struct xgene_dma *pdma)
+{
+ /*
+ * Mask DMA ring overflow, underflow and
+ * AXI write/read error interrupts
+ */
+ iowrite32(XGENE_DMA_INT_ALL_MASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT0_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_MASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT1_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_MASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT2_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_MASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT3_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_MASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT4_MASK);
+
+ /* Mask DMA error interrupts */
+ iowrite32(XGENE_DMA_INT_ALL_MASK, pdma->csr_dma + XGENE_DMA_INT_MASK);
+}
+
+static void xgene_dma_unmask_interrupts(struct xgene_dma *pdma)
+{
+ /*
+ * Unmask DMA ring overflow, underflow and
+ * AXI write/read error interrupts
+ */
+ iowrite32(XGENE_DMA_INT_ALL_UNMASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT0_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_UNMASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT1_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_UNMASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT2_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_UNMASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT3_MASK);
+ iowrite32(XGENE_DMA_INT_ALL_UNMASK,
+ pdma->csr_dma + XGENE_DMA_RING_INT4_MASK);
+
+ /* Unmask DMA error interrupts */
+ iowrite32(XGENE_DMA_INT_ALL_UNMASK,
+ pdma->csr_dma + XGENE_DMA_INT_MASK);
+}
+
+static void xgene_dma_init_hw(struct xgene_dma *pdma)
+{
+ u32 val;
+
+ /* Associate DMA ring to corresponding ring HW */
+ iowrite32(XGENE_DMA_ASSOC_RING_MNGR1,
+ pdma->csr_dma + XGENE_DMA_CFG_RING_WQ_ASSOC);
+
+ /* Configure RAID6 polynomial control setting */
+ if (is_pq_enabled(pdma))
+ iowrite32(XGENE_DMA_RAID6_MULTI_CTRL(0x1D),
+ pdma->csr_dma + XGENE_DMA_RAID6_CONT);
+ else
+ dev_info(pdma->dev, "PQ is disabled in HW\n");
+
+ xgene_dma_enable(pdma);
+ xgene_dma_unmask_interrupts(pdma);
+
+ /* Get DMA id and version info */
+ val = ioread32(pdma->csr_dma + XGENE_DMA_IPBRR);
+
+ /* DMA device info */
+ dev_info(pdma->dev,
+ "X-Gene DMA v%d.%02d.%02d driver registered %d channels",
+ XGENE_DMA_REV_NO_RD(val), XGENE_DMA_BUS_ID_RD(val),
+ XGENE_DMA_DEV_ID_RD(val), XGENE_DMA_MAX_CHANNEL);
+}
+
+static int xgene_dma_init_ring_mngr(struct xgene_dma *pdma)
+{
+ if (ioread32(pdma->csr_ring + XGENE_DMA_RING_CLKEN) &&
+ (!ioread32(pdma->csr_ring + XGENE_DMA_RING_SRST)))
+ return 0;
+
+ iowrite32(0x3, pdma->csr_ring + XGENE_DMA_RING_CLKEN);
+ iowrite32(0x0, pdma->csr_ring + XGENE_DMA_RING_SRST);
+
+ /* Bring up memory */
+ iowrite32(0x0, pdma->csr_ring + XGENE_DMA_RING_MEM_RAM_SHUTDOWN);
+
+ /* Force a barrier */
+ ioread32(pdma->csr_ring + XGENE_DMA_RING_MEM_RAM_SHUTDOWN);
+
+ /* reset may take up to 1ms */
+ usleep_range(1000, 1100);
+
+ if (ioread32(pdma->csr_ring + XGENE_DMA_RING_BLK_MEM_RDY)
+ != XGENE_DMA_RING_BLK_MEM_RDY_VAL) {
+ dev_err(pdma->dev,
+ "Failed to release ring mngr memory from shutdown\n");
+ return -ENODEV;
+ }
+
+ /* program threshold set 1 and all hysteresis */
+ iowrite32(XGENE_DMA_RING_THRESLD0_SET1_VAL,
+ pdma->csr_ring + XGENE_DMA_RING_THRESLD0_SET1);
+ iowrite32(XGENE_DMA_RING_THRESLD1_SET1_VAL,
+ pdma->csr_ring + XGENE_DMA_RING_THRESLD1_SET1);
+ iowrite32(XGENE_DMA_RING_HYSTERESIS_VAL,
+ pdma->csr_ring + XGENE_DMA_RING_HYSTERESIS);
+
+ /* Enable QPcore and assign error queue */
+ iowrite32(XGENE_DMA_RING_ENABLE,
+ pdma->csr_ring + XGENE_DMA_RING_CONFIG);
+
+ return 0;
+}
+
+static int xgene_dma_init_mem(struct xgene_dma *pdma)
+{
+ int ret;
+
+ ret = xgene_dma_init_ring_mngr(pdma);
+ if (ret)
+ return ret;
+
+ /* Bring up memory */
+ iowrite32(0x0, pdma->csr_dma + XGENE_DMA_MEM_RAM_SHUTDOWN);
+
+ /* Force a barrier */
+ ioread32(pdma->csr_dma + XGENE_DMA_MEM_RAM_SHUTDOWN);
+
+ /* reset may take up to 1ms */
+ usleep_range(1000, 1100);
+
+ if (ioread32(pdma->csr_dma + XGENE_DMA_BLK_MEM_RDY)
+ != XGENE_DMA_BLK_MEM_RDY_VAL) {
+ dev_err(pdma->dev,
+ "Failed to release DMA memory from shutdown\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int xgene_dma_request_irqs(struct xgene_dma *pdma)
+{
+ struct xgene_dma_chan *chan;
+ int ret, i, j;
+
+ /* Register DMA error irq */
+ ret = devm_request_irq(pdma->dev, pdma->err_irq, xgene_dma_err_isr,
+ 0, "dma_error", pdma);
+ if (ret) {
+ dev_err(pdma->dev,
+ "Failed to register error IRQ %d\n", pdma->err_irq);
+ return ret;
+ }
+
+ /* Register DMA channel rx irq */
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) {
+ chan = &pdma->chan[i];
+ ret = devm_request_irq(chan->dev, chan->rx_irq,
+ xgene_dma_chan_ring_isr,
+ 0, chan->name, chan);
+ if (ret) {
+ chan_err(chan, "Failed to register Rx IRQ %d\n",
+ chan->rx_irq);
+ devm_free_irq(pdma->dev, pdma->err_irq, pdma);
+
+ for (j = 0; j < i; j++) {
+ chan = &pdma->chan[i];
+ devm_free_irq(chan->dev, chan->rx_irq, chan);
+ }
+
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void xgene_dma_free_irqs(struct xgene_dma *pdma)
+{
+ struct xgene_dma_chan *chan;
+ int i;
+
+ /* Free DMA device error irq */
+ devm_free_irq(pdma->dev, pdma->err_irq, pdma);
+
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) {
+ chan = &pdma->chan[i];
+ devm_free_irq(chan->dev, chan->rx_irq, chan);
+ }
+}
+
+static void xgene_dma_set_caps(struct xgene_dma_chan *chan,
+ struct dma_device *dma_dev)
+{
+ /* Initialize DMA device capability mask */
+ dma_cap_zero(dma_dev->cap_mask);
+
+ /* Set DMA device capability */
+ dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
+ dma_cap_set(DMA_SG, dma_dev->cap_mask);
+
+ /* Basically here, the X-Gene SoC DMA engine channel 0 supports XOR
+ * and channel 1 supports XOR, PQ both. First thing here is we have
+ * mechanism in hw to enable/disable PQ/XOR supports on channel 1,
+ * we can make sure this by reading SoC Efuse register.
+ * Second thing, we have hw errata that if we run channel 0 and
+ * channel 1 simultaneously with executing XOR and PQ request,
+ * suddenly DMA engine hangs, So here we enable XOR on channel 0 only
+ * if XOR and PQ supports on channel 1 is disabled.
+ */
+ if ((chan->id == XGENE_DMA_PQ_CHANNEL) &&
+ is_pq_enabled(chan->pdma)) {
+ dma_cap_set(DMA_PQ, dma_dev->cap_mask);
+ dma_cap_set(DMA_XOR, dma_dev->cap_mask);
+ } else if ((chan->id == XGENE_DMA_XOR_CHANNEL) &&
+ !is_pq_enabled(chan->pdma)) {
+ dma_cap_set(DMA_XOR, dma_dev->cap_mask);
+ }
+
+ /* Set base and prep routines */
+ dma_dev->dev = chan->dev;
+ dma_dev->device_alloc_chan_resources = xgene_dma_alloc_chan_resources;
+ dma_dev->device_free_chan_resources = xgene_dma_free_chan_resources;
+ dma_dev->device_issue_pending = xgene_dma_issue_pending;
+ dma_dev->device_tx_status = xgene_dma_tx_status;
+ dma_dev->device_prep_dma_memcpy = xgene_dma_prep_memcpy;
+ dma_dev->device_prep_dma_sg = xgene_dma_prep_sg;
+
+ if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
+ dma_dev->device_prep_dma_xor = xgene_dma_prep_xor;
+ dma_dev->max_xor = XGENE_DMA_MAX_XOR_SRC;
+ dma_dev->xor_align = XGENE_DMA_XOR_ALIGNMENT;
+ }
+
+ if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
+ dma_dev->device_prep_dma_pq = xgene_dma_prep_pq;
+ dma_dev->max_pq = XGENE_DMA_MAX_XOR_SRC;
+ dma_dev->pq_align = XGENE_DMA_XOR_ALIGNMENT;
+ }
+}
+
+static int xgene_dma_async_register(struct xgene_dma *pdma, int id)
+{
+ struct xgene_dma_chan *chan = &pdma->chan[id];
+ struct dma_device *dma_dev = &pdma->dma_dev[id];
+ int ret;
+
+ chan->dma_chan.device = dma_dev;
+
+ spin_lock_init(&chan->lock);
+ INIT_LIST_HEAD(&chan->ld_pending);
+ INIT_LIST_HEAD(&chan->ld_running);
+ INIT_LIST_HEAD(&chan->ld_completed);
+ tasklet_init(&chan->tasklet, xgene_dma_tasklet_cb,
+ (unsigned long)chan);
+
+ chan->pending = 0;
+ chan->desc_pool = NULL;
+ dma_cookie_init(&chan->dma_chan);
+
+ /* Setup dma device capabilities and prep routines */
+ xgene_dma_set_caps(chan, dma_dev);
+
+ /* Initialize DMA device list head */
+ INIT_LIST_HEAD(&dma_dev->channels);
+ list_add_tail(&chan->dma_chan.device_node, &dma_dev->channels);
+
+ /* Register with Linux async DMA framework*/
+ ret = dma_async_device_register(dma_dev);
+ if (ret) {
+ chan_err(chan, "Failed to register async device %d", ret);
+ tasklet_kill(&chan->tasklet);
+
+ return ret;
+ }
+
+ /* DMA capability info */
+ dev_info(pdma->dev,
+ "%s: CAPABILITY ( %s%s%s%s)\n", dma_chan_name(&chan->dma_chan),
+ dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "MEMCPY " : "",
+ dma_has_cap(DMA_SG, dma_dev->cap_mask) ? "SGCPY " : "",
+ dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "XOR " : "",
+ dma_has_cap(DMA_PQ, dma_dev->cap_mask) ? "PQ " : "");
+
+ return 0;
+}
+
+static int xgene_dma_init_async(struct xgene_dma *pdma)
+{
+ int ret, i, j;
+
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL ; i++) {
+ ret = xgene_dma_async_register(pdma, i);
+ if (ret) {
+ for (j = 0; j < i; j++) {
+ dma_async_device_unregister(&pdma->dma_dev[j]);
+ tasklet_kill(&pdma->chan[j].tasklet);
+ }
+
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static void xgene_dma_async_unregister(struct xgene_dma *pdma)
+{
+ int i;
+
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++)
+ dma_async_device_unregister(&pdma->dma_dev[i]);
+}
+
+static void xgene_dma_init_channels(struct xgene_dma *pdma)
+{
+ struct xgene_dma_chan *chan;
+ int i;
+
+ pdma->ring_num = XGENE_DMA_RING_NUM;
+
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) {
+ chan = &pdma->chan[i];
+ chan->dev = pdma->dev;
+ chan->pdma = pdma;
+ chan->id = i;
+ snprintf(chan->name, sizeof(chan->name), "dmachan%d", chan->id);
+ }
+}
+
+static int xgene_dma_get_resources(struct platform_device *pdev,
+ struct xgene_dma *pdma)
+{
+ struct resource *res;
+ int irq, i;
+
+ /* Get DMA csr region */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get csr region\n");
+ return -ENXIO;
+ }
+
+ pdma->csr_dma = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!pdma->csr_dma) {
+ dev_err(&pdev->dev, "Failed to ioremap csr region");
+ return -ENOMEM;
+ }
+
+ /* Get DMA ring csr region */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get ring csr region\n");
+ return -ENXIO;
+ }
+
+ pdma->csr_ring = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!pdma->csr_ring) {
+ dev_err(&pdev->dev, "Failed to ioremap ring csr region");
+ return -ENOMEM;
+ }
+
+ /* Get DMA ring cmd csr region */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get ring cmd csr region\n");
+ return -ENXIO;
+ }
+
+ pdma->csr_ring_cmd = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!pdma->csr_ring_cmd) {
+ dev_err(&pdev->dev, "Failed to ioremap ring cmd csr region");
+ return -ENOMEM;
+ }
+
+ /* Get efuse csr region */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get efuse csr region\n");
+ return -ENXIO;
+ }
+
+ pdma->csr_efuse = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!pdma->csr_efuse) {
+ dev_err(&pdev->dev, "Failed to ioremap efuse csr region");
+ return -ENOMEM;
+ }
+
+ /* Get DMA error interrupt */
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(&pdev->dev, "Failed to get Error IRQ\n");
+ return -ENXIO;
+ }
+
+ pdma->err_irq = irq;
+
+ /* Get DMA Rx ring descriptor interrupts for all DMA channels */
+ for (i = 1; i <= XGENE_DMA_MAX_CHANNEL; i++) {
+ irq = platform_get_irq(pdev, i);
+ if (irq <= 0) {
+ dev_err(&pdev->dev, "Failed to get Rx IRQ\n");
+ return -ENXIO;
+ }
+
+ pdma->chan[i - 1].rx_irq = irq;
+ }
+
+ return 0;
+}
+
+static int xgene_dma_probe(struct platform_device *pdev)
+{
+ struct xgene_dma *pdma;
+ int ret, i;
+
+ pdma = devm_kzalloc(&pdev->dev, sizeof(*pdma), GFP_KERNEL);
+ if (!pdma)
+ return -ENOMEM;
+
+ pdma->dev = &pdev->dev;
+ platform_set_drvdata(pdev, pdma);
+
+ ret = xgene_dma_get_resources(pdev, pdma);
+ if (ret)
+ return ret;
+
+ pdma->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(pdma->clk)) {
+ dev_err(&pdev->dev, "Failed to get clk\n");
+ return PTR_ERR(pdma->clk);
+ }
+
+ /* Enable clk before accessing registers */
+ ret = clk_prepare_enable(pdma->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to enable clk %d\n", ret);
+ return ret;
+ }
+
+ /* Remove DMA RAM out of shutdown */
+ ret = xgene_dma_init_mem(pdma);
+ if (ret)
+ goto err_clk_enable;
+
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(42));
+ if (ret) {
+ dev_err(&pdev->dev, "No usable DMA configuration\n");
+ goto err_dma_mask;
+ }
+
+ /* Initialize DMA channels software state */
+ xgene_dma_init_channels(pdma);
+
+ /* Configue DMA rings */
+ ret = xgene_dma_init_rings(pdma);
+ if (ret)
+ goto err_clk_enable;
+
+ ret = xgene_dma_request_irqs(pdma);
+ if (ret)
+ goto err_request_irq;
+
+ /* Configure and enable DMA engine */
+ xgene_dma_init_hw(pdma);
+
+ /* Register DMA device with linux async framework */
+ ret = xgene_dma_init_async(pdma);
+ if (ret)
+ goto err_async_init;
+
+ return 0;
+
+err_async_init:
+ xgene_dma_free_irqs(pdma);
+
+err_request_irq:
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++)
+ xgene_dma_delete_chan_rings(&pdma->chan[i]);
+
+err_dma_mask:
+err_clk_enable:
+ clk_disable_unprepare(pdma->clk);
+
+ return ret;
+}
+
+static int xgene_dma_remove(struct platform_device *pdev)
+{
+ struct xgene_dma *pdma = platform_get_drvdata(pdev);
+ struct xgene_dma_chan *chan;
+ int i;
+
+ xgene_dma_async_unregister(pdma);
+
+ /* Mask interrupts and disable DMA engine */
+ xgene_dma_mask_interrupts(pdma);
+ xgene_dma_disable(pdma);
+ xgene_dma_free_irqs(pdma);
+
+ for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++) {
+ chan = &pdma->chan[i];
+ tasklet_kill(&chan->tasklet);
+ xgene_dma_delete_chan_rings(chan);
+ }
+
+ clk_disable_unprepare(pdma->clk);
+
+ return 0;
+}
+
+static const struct of_device_id xgene_dma_of_match_ptr[] = {
+ {.compatible = "apm,xgene-storm-dma",},
+ {},
+};
+MODULE_DEVICE_TABLE(of, xgene_dma_of_match_ptr);
+
+static struct platform_driver xgene_dma_driver = {
+ .probe = xgene_dma_probe,
+ .remove = xgene_dma_remove,
+ .driver = {
+ .name = "X-Gene-DMA",
+ .of_match_table = xgene_dma_of_match_ptr,
+ },
+};
+
+module_platform_driver(xgene_dma_driver);
+
+MODULE_DESCRIPTION("APM X-Gene SoC DMA driver");
+MODULE_AUTHOR("Rameshwar Prasad Sahu <rsahu@apm.com>");
+MODULE_AUTHOR("Loc Ho <lho@apm.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0");
* (at your option) any later version.
*/
-#include <linux/amba/xilinx_dma.h>
#include <linux/bitops.h>
#include <linux/dmapool.h>
+#include <linux/dma/xilinx_dma.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
{
struct dma_slave_config cfg = { 0, };
struct dma_chan *chan;
- unsigned int slave_id;
+ void *slave_data = NULL;
struct resource *res;
dma_cap_mask_t mask;
int ret;
dma_cap_set(DMA_SLAVE, mask);
if (pdata)
- slave_id = direction == DMA_MEM_TO_DEV
- ? pdata->slave_id_tx : pdata->slave_id_rx;
- else
- slave_id = 0;
+ slave_data = direction == DMA_MEM_TO_DEV ?
+ (void *)pdata->slave_id_tx :
+ (void *)pdata->slave_id_rx;
chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
- (void *)(unsigned long)slave_id, &host->pd->dev,
+ slave_data, &host->pd->dev,
direction == DMA_MEM_TO_DEV ? "tx" : "rx");
dev_dbg(&host->pd->dev, "%s: %s: got channel %p\n", __func__,
res = platform_get_resource(host->pd, IORESOURCE_MEM, 0);
- /* In the OF case the driver will get the slave ID from the DT */
- cfg.slave_id = slave_id;
cfg.direction = direction;
if (direction == DMA_DEV_TO_MEM) {
of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
struct sh_mobile_sdhi *priv;
struct tmio_mmc_data *mmc_data;
- struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+ struct tmio_mmc_data *mmd = pdev->dev.platform_data;
struct tmio_mmc_host *host;
struct resource *res;
int irq, ret, i = 0;
else
host->bus_shift = 0;
- mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
- if (p) {
- mmc_data->flags = p->tmio_flags;
- mmc_data->ocr_mask = p->tmio_ocr_mask;
- mmc_data->capabilities |= p->tmio_caps;
- mmc_data->capabilities2 |= p->tmio_caps2;
- mmc_data->cd_gpio = p->cd_gpio;
-
- if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
- /*
- * Yes, we have to provide slave IDs twice to TMIO:
- * once as a filter parameter and once for channel
- * configuration as an explicit slave ID
- */
- dma_priv->chan_priv_tx = (void *)p->dma_slave_tx;
- dma_priv->chan_priv_rx = (void *)p->dma_slave_rx;
- dma_priv->slave_id_tx = p->dma_slave_tx;
- dma_priv->slave_id_rx = p->dma_slave_rx;
- }
- }
+ if (mmd)
+ *mmc_data = *mmd;
+
dma_priv->filter = shdma_chan_filter;
dma_priv->enable = sh_mobile_sdhi_enable_dma;
mmc_data->alignment_shift = 1; /* 2-byte alignment */
+ mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED;
/*
* All SDHI blocks support 2-byte and larger block sizes in 4-bit
struct tmio_mmc_host;
struct tmio_mmc_dma {
- void *chan_priv_tx;
- void *chan_priv_rx;
- int slave_id_tx;
- int slave_id_rx;
enum dma_slave_buswidth dma_buswidth;
bool (*filter)(struct dma_chan *chan, void *arg);
void (*enable)(struct tmio_mmc_host *host, bool enable);
{
/* We can only either use DMA for both Tx and Rx or not use it at all */
if (!host->dma || (!host->pdev->dev.of_node &&
- (!host->dma->chan_priv_tx || !host->dma->chan_priv_rx)))
+ (!pdata->chan_priv_tx || !pdata->chan_priv_rx)))
return;
if (!host->chan_tx && !host->chan_rx) {
dma_cap_set(DMA_SLAVE, mask);
host->chan_tx = dma_request_slave_channel_compat(mask,
- host->dma->filter, host->dma->chan_priv_tx,
+ host->dma->filter, pdata->chan_priv_tx,
&host->pdev->dev, "tx");
dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
host->chan_tx);
if (!host->chan_tx)
return;
- if (host->dma->chan_priv_tx)
- cfg.slave_id = host->dma->slave_id_tx;
cfg.direction = DMA_MEM_TO_DEV;
cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift);
cfg.dst_addr_width = host->dma->dma_buswidth;
goto ecfgtx;
host->chan_rx = dma_request_slave_channel_compat(mask,
- host->dma->filter, host->dma->chan_priv_rx,
+ host->dma->filter, pdata->chan_priv_rx,
&host->pdev->dev, "rx");
dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
host->chan_rx);
if (!host->chan_rx)
goto ereqrx;
- if (host->dma->chan_priv_rx)
- cfg.slave_id = host->dma->slave_id_rx;
cfg.direction = DMA_DEV_TO_MEM;
cfg.src_addr = cfg.dst_addr + host->pdata->dma_rx_offset;
cfg.src_addr_width = host->dma->dma_buswidth;
return;
memset(&cfg, 0, sizeof(cfg));
- cfg.slave_id = pdata->slave_id_fifo0_tx;
cfg.direction = DMA_MEM_TO_DEV;
cfg.dst_addr = (dma_addr_t)FLDTFIFO(flctl);
cfg.src_addr = 0;
if (!flctl->chan_fifo0_rx)
goto err;
- cfg.slave_id = pdata->slave_id_fifo0_rx;
cfg.direction = DMA_DEV_TO_MEM;
cfg.dst_addr = 0;
cfg.src_addr = (dma_addr_t)FLDTFIFO(flctl);
}
memset(&cfg, 0, sizeof(cfg));
- cfg.slave_id = id;
cfg.direction = dir;
if (dir == DMA_MEM_TO_DEV) {
cfg.dst_addr = port_addr;
}
memset(&cfg, 0, sizeof(cfg));
- cfg.slave_id = id;
cfg.direction = dir;
if (dir == DMA_MEM_TO_DEV) {
cfg.dst_addr = port_addr;
--- /dev/null
+#ifndef __DT_BINDINGS_DMA_JZ4780_DMA_H__
+#define __DT_BINDINGS_DMA_JZ4780_DMA_H__
+
+/*
+ * Request type numbers for the JZ4780 DMA controller (written to the DRTn
+ * register for the channel).
+ */
+#define JZ4780_DMA_I2S1_TX 0x4
+#define JZ4780_DMA_I2S1_RX 0x5
+#define JZ4780_DMA_I2S0_TX 0x6
+#define JZ4780_DMA_I2S0_RX 0x7
+#define JZ4780_DMA_AUTO 0x8
+#define JZ4780_DMA_SADC_RX 0x9
+#define JZ4780_DMA_UART4_TX 0xc
+#define JZ4780_DMA_UART4_RX 0xd
+#define JZ4780_DMA_UART3_TX 0xe
+#define JZ4780_DMA_UART3_RX 0xf
+#define JZ4780_DMA_UART2_TX 0x10
+#define JZ4780_DMA_UART2_RX 0x11
+#define JZ4780_DMA_UART1_TX 0x12
+#define JZ4780_DMA_UART1_RX 0x13
+#define JZ4780_DMA_UART0_TX 0x14
+#define JZ4780_DMA_UART0_RX 0x15
+#define JZ4780_DMA_SSI0_TX 0x16
+#define JZ4780_DMA_SSI0_RX 0x17
+#define JZ4780_DMA_SSI1_TX 0x18
+#define JZ4780_DMA_SSI1_RX 0x19
+#define JZ4780_DMA_MSC0_TX 0x1a
+#define JZ4780_DMA_MSC0_RX 0x1b
+#define JZ4780_DMA_MSC1_TX 0x1c
+#define JZ4780_DMA_MSC1_RX 0x1d
+#define JZ4780_DMA_MSC2_TX 0x1e
+#define JZ4780_DMA_MSC2_RX 0x1f
+#define JZ4780_DMA_PCM0_TX 0x20
+#define JZ4780_DMA_PCM0_RX 0x21
+#define JZ4780_DMA_SMB0_TX 0x24
+#define JZ4780_DMA_SMB0_RX 0x25
+#define JZ4780_DMA_SMB1_TX 0x26
+#define JZ4780_DMA_SMB1_RX 0x27
+#define JZ4780_DMA_SMB2_TX 0x28
+#define JZ4780_DMA_SMB2_RX 0x29
+#define JZ4780_DMA_SMB3_TX 0x2a
+#define JZ4780_DMA_SMB3_RX 0x2b
+#define JZ4780_DMA_SMB4_TX 0x2c
+#define JZ4780_DMA_SMB4_RX 0x2d
+#define JZ4780_DMA_DES_TX 0x2e
+#define JZ4780_DMA_DES_RX 0x2f
+
+#endif /* __DT_BINDINGS_DMA_JZ4780_DMA_H__ */
+++ /dev/null
-/*
- * Xilinx DMA Engine drivers support header file
- *
- * Copyright (C) 2010-2014 Xilinx, Inc. All rights reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __DMA_XILINX_DMA_H
-#define __DMA_XILINX_DMA_H
-
-#include <linux/dma-mapping.h>
-#include <linux/dmaengine.h>
-
-/**
- * struct xilinx_vdma_config - VDMA Configuration structure
- * @frm_dly: Frame delay
- * @gen_lock: Whether in gen-lock mode
- * @master: Master that it syncs to
- * @frm_cnt_en: Enable frame count enable
- * @park: Whether wants to park
- * @park_frm: Frame to park on
- * @coalesc: Interrupt coalescing threshold
- * @delay: Delay counter
- * @reset: Reset Channel
- * @ext_fsync: External Frame Sync source
- */
-struct xilinx_vdma_config {
- int frm_dly;
- int gen_lock;
- int master;
- int frm_cnt_en;
- int park;
- int park_frm;
- int coalesc;
- int delay;
- int reset;
- int ext_fsync;
-};
-
-int xilinx_vdma_channel_set_config(struct dma_chan *dchan,
- struct xilinx_vdma_config *cfg);
-
-#endif
--- /dev/null
+/*
+ * Xilinx DMA Engine drivers support header file
+ *
+ * Copyright (C) 2010-2014 Xilinx, Inc. All rights reserved.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __DMA_XILINX_DMA_H
+#define __DMA_XILINX_DMA_H
+
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+
+/**
+ * struct xilinx_vdma_config - VDMA Configuration structure
+ * @frm_dly: Frame delay
+ * @gen_lock: Whether in gen-lock mode
+ * @master: Master that it syncs to
+ * @frm_cnt_en: Enable frame count enable
+ * @park: Whether wants to park
+ * @park_frm: Frame to park on
+ * @coalesc: Interrupt coalescing threshold
+ * @delay: Delay counter
+ * @reset: Reset Channel
+ * @ext_fsync: External Frame Sync source
+ */
+struct xilinx_vdma_config {
+ int frm_dly;
+ int gen_lock;
+ int master;
+ int frm_cnt_en;
+ int park;
+ int park_frm;
+ int coalesc;
+ int delay;
+ int reset;
+ int ext_fsync;
+};
+
+int xilinx_vdma_channel_set_config(struct dma_chan *dchan,
+ struct xilinx_vdma_config *cfg);
+
+#endif
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
* @copy_align: alignment shift for memcpy operations
* @xor_align: alignment shift for xor operations
* @pq_align: alignment shift for pq operations
- * @fill_align: alignment shift for memset operations
* @dev_id: unique device ID
* @dev: struct device reference for dma mapping api
* @src_addr_widths: bit mask of src addr widths the device supports
u8 copy_align;
u8 xor_align;
u8 pq_align;
- u8 fill_align;
#define DMA_HAS_PQ_CONTINUE (1 << 15)
int dev_id;
return dmaengine_check_align(dev->pq_align, off1, off2, len);
}
-static inline bool is_dma_fill_aligned(struct dma_device *dev, size_t off1,
- size_t off2, size_t len)
-{
- return dmaengine_check_align(dev->fill_align, off1, off2, len);
-}
-
static inline void
dma_set_maxpq(struct dma_device *dma, int maxpq, int has_pq_continue)
{
void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
struct dma_chan *dma_get_any_slave_channel(struct dma_device *device);
-struct dma_chan *net_dma_find_channel(void);
#define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y)
#define dma_request_slave_channel_compat(mask, x, y, dev, name) \
__dma_request_slave_channel_compat(&(mask), x, y, dev, name)
return __dma_request_channel(mask, fn, fn_param);
}
-
-/* --- Helper iov-locking functions --- */
-
-struct dma_page_list {
- char __user *base_address;
- int nr_pages;
- struct page **pages;
-};
-
-struct dma_pinned_list {
- int nr_iovecs;
- struct dma_page_list page_list[0];
-};
-
-struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len);
-void dma_unpin_iovec_pages(struct dma_pinned_list* pinned_list);
-
-dma_cookie_t dma_memcpy_to_iovec(struct dma_chan *chan, struct iovec *iov,
- struct dma_pinned_list *pinned_list, unsigned char *kdata, size_t len);
-dma_cookie_t dma_memcpy_pg_to_iovec(struct dma_chan *chan, struct iovec *iov,
- struct dma_pinned_list *pinned_list, struct page *page,
- unsigned int offset, size_t len);
-
#endif /* DMAENGINE_H */
* data for the MMC controller
*/
struct tmio_mmc_data {
+ void *chan_priv_tx;
+ void *chan_priv_rx;
unsigned int hclk;
unsigned long capabilities;
unsigned long capabilities2;
#define SH_MOBILE_SDHI_IRQ_SDCARD "sdcard"
#define SH_MOBILE_SDHI_IRQ_SDIO "sdio"
-struct sh_mobile_sdhi_info {
- int dma_slave_tx;
- int dma_slave_rx;
- unsigned long tmio_flags;
- unsigned long tmio_caps;
- unsigned long tmio_caps2;
- u32 tmio_ocr_mask; /* available MMC voltages */
- unsigned int cd_gpio;
-};
-
#endif /* LINUX_MMC_SH_MOBILE_SDHI_H */
s32 ssish_2_mcu_addr;
s32 hdmi_dma_addr;
/* End of v2 array */
+ s32 zcanfd_2_mcu_addr;
+ s32 zqspi_2_mcu_addr;
+ /* End of v3 array */
};
/**
int id; /* Raw id of this channel */
int irq; /* Channel IRQ */
int slave_id; /* Client ID for slave DMA */
+ int real_slave_id; /* argument passed to filter function */
int hw_req; /* DMA request line for slave DMA - same
* as MID/RID, used with DT */
enum shdma_pm_state pm_state;
struct fsi_priv {
void __iomem *base;
+ phys_addr_t phys;
struct fsi_master *master;
struct fsi_stream playback;
shdma_chan_filter, (void *)io->dma_id,
dev, is_play ? "tx" : "rx");
if (io->chan) {
- struct dma_slave_config cfg;
+ struct dma_slave_config cfg = {};
int ret;
- cfg.slave_id = io->dma_id;
- cfg.dst_addr = 0; /* use default addr */
- cfg.src_addr = 0; /* use default addr */
- cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
+ if (is_play) {
+ cfg.dst_addr = fsi->phys + REG_DODT;
+ cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ cfg.direction = DMA_MEM_TO_DEV;
+ } else {
+ cfg.src_addr = fsi->phys + REG_DIDT;
+ cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ cfg.direction = DMA_DEV_TO_MEM;
+ }
ret = dmaengine_slave_config(io->chan, &cfg);
if (ret < 0) {
/* FSI A setting */
fsi = &master->fsia;
fsi->base = master->base;
+ fsi->phys = res->start;
fsi->master = master;
fsi_port_info_init(fsi, &info.port_a);
fsi_handler_init(fsi, &info.port_a);
/* FSI B setting */
fsi = &master->fsib;
fsi->base = master->base + 0x40;
+ fsi->phys = res->start + 0x40;
fsi->master = master;
fsi_port_info_init(fsi, &info.port_b);
fsi_handler_init(fsi, &info.port_b);
projects / linux-2.6-block.git / commitdiff