2 * ahci.c - AHCI SATA support
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2004-2005 Red Hat, Inc.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
29 * AHCI hardware documentation:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/interrupt.h>
42 #include <linux/sched.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/device.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_cmnd.h>
47 #include <linux/libata.h>
50 #define DRV_NAME "ahci"
51 #define DRV_VERSION "2.0"
56 AHCI_MAX_SG = 168, /* hardware max is 64K */
57 AHCI_DMA_BOUNDARY = 0xffffffff,
58 AHCI_USE_CLUSTERING = 0,
61 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
63 AHCI_CMD_TBL_CDB = 0x40,
64 AHCI_CMD_TBL_HDR_SZ = 0x80,
65 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
66 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
67 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
69 AHCI_IRQ_ON_SG = (1 << 31),
70 AHCI_CMD_ATAPI = (1 << 5),
71 AHCI_CMD_WRITE = (1 << 6),
72 AHCI_CMD_PREFETCH = (1 << 7),
73 AHCI_CMD_RESET = (1 << 8),
74 AHCI_CMD_CLR_BUSY = (1 << 10),
76 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
77 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
80 board_ahci_vt8251 = 1,
82 /* global controller registers */
83 HOST_CAP = 0x00, /* host capabilities */
84 HOST_CTL = 0x04, /* global host control */
85 HOST_IRQ_STAT = 0x08, /* interrupt status */
86 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
87 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
90 HOST_RESET = (1 << 0), /* reset controller; self-clear */
91 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
92 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
95 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
96 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
97 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
98 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
99 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
101 /* registers for each SATA port */
102 PORT_LST_ADDR = 0x00, /* command list DMA addr */
103 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
104 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
105 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
106 PORT_IRQ_STAT = 0x10, /* interrupt status */
107 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
108 PORT_CMD = 0x18, /* port command */
109 PORT_TFDATA = 0x20, /* taskfile data */
110 PORT_SIG = 0x24, /* device TF signature */
111 PORT_CMD_ISSUE = 0x38, /* command issue */
112 PORT_SCR = 0x28, /* SATA phy register block */
113 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
114 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
115 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
116 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
118 /* PORT_IRQ_{STAT,MASK} bits */
119 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
120 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
121 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
122 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
123 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
124 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
125 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
126 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
128 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
129 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
130 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
131 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
132 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
133 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
134 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
135 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
136 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
138 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
143 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
145 PORT_IRQ_HBUS_DATA_ERR,
146 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
147 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
148 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
151 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
152 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
153 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
154 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
155 PORT_CMD_CLO = (1 << 3), /* Command list override */
156 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
157 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
158 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
160 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
161 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
162 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
163 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
165 /* hpriv->flags bits */
166 AHCI_FLAG_MSI = (1 << 0),
169 AHCI_FLAG_RESET_NEEDS_CLO = (1 << 24),
170 AHCI_FLAG_NO_NCQ = (1 << 25),
173 struct ahci_cmd_hdr {
188 struct ahci_host_priv {
190 u32 cap; /* cache of HOST_CAP register */
191 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
194 struct ahci_port_priv {
195 struct ahci_cmd_hdr *cmd_slot;
196 dma_addr_t cmd_slot_dma;
198 dma_addr_t cmd_tbl_dma;
200 dma_addr_t rx_fis_dma;
203 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
204 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
205 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
206 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
207 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
208 static void ahci_irq_clear(struct ata_port *ap);
209 static int ahci_port_start(struct ata_port *ap);
210 static void ahci_port_stop(struct ata_port *ap);
211 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
212 static void ahci_qc_prep(struct ata_queued_cmd *qc);
213 static u8 ahci_check_status(struct ata_port *ap);
214 static void ahci_freeze(struct ata_port *ap);
215 static void ahci_thaw(struct ata_port *ap);
216 static void ahci_error_handler(struct ata_port *ap);
217 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
218 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
219 static int ahci_port_resume(struct ata_port *ap);
220 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
221 static int ahci_pci_device_resume(struct pci_dev *pdev);
222 static void ahci_remove_one (struct pci_dev *pdev);
224 static struct scsi_host_template ahci_sht = {
225 .module = THIS_MODULE,
227 .ioctl = ata_scsi_ioctl,
228 .queuecommand = ata_scsi_queuecmd,
229 .change_queue_depth = ata_scsi_change_queue_depth,
230 .can_queue = AHCI_MAX_CMDS - 1,
231 .this_id = ATA_SHT_THIS_ID,
232 .sg_tablesize = AHCI_MAX_SG,
233 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
234 .emulated = ATA_SHT_EMULATED,
235 .use_clustering = AHCI_USE_CLUSTERING,
236 .proc_name = DRV_NAME,
237 .dma_boundary = AHCI_DMA_BOUNDARY,
238 .slave_configure = ata_scsi_slave_config,
239 .slave_destroy = ata_scsi_slave_destroy,
240 .bios_param = ata_std_bios_param,
241 .suspend = ata_scsi_device_suspend,
242 .resume = ata_scsi_device_resume,
245 static const struct ata_port_operations ahci_ops = {
246 .port_disable = ata_port_disable,
248 .check_status = ahci_check_status,
249 .check_altstatus = ahci_check_status,
250 .dev_select = ata_noop_dev_select,
252 .tf_read = ahci_tf_read,
254 .qc_prep = ahci_qc_prep,
255 .qc_issue = ahci_qc_issue,
257 .irq_handler = ahci_interrupt,
258 .irq_clear = ahci_irq_clear,
260 .scr_read = ahci_scr_read,
261 .scr_write = ahci_scr_write,
263 .freeze = ahci_freeze,
266 .error_handler = ahci_error_handler,
267 .post_internal_cmd = ahci_post_internal_cmd,
269 .port_suspend = ahci_port_suspend,
270 .port_resume = ahci_port_resume,
272 .port_start = ahci_port_start,
273 .port_stop = ahci_port_stop,
276 static const struct ata_port_info ahci_port_info[] = {
280 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
281 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
282 ATA_FLAG_SKIP_D2H_BSY,
283 .pio_mask = 0x1f, /* pio0-4 */
284 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
285 .port_ops = &ahci_ops,
287 /* board_ahci_vt8251 */
290 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
291 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
292 ATA_FLAG_SKIP_D2H_BSY |
293 AHCI_FLAG_RESET_NEEDS_CLO | AHCI_FLAG_NO_NCQ,
294 .pio_mask = 0x1f, /* pio0-4 */
295 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
296 .port_ops = &ahci_ops,
300 static const struct pci_device_id ahci_pci_tbl[] = {
302 { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
303 board_ahci }, /* ICH6 */
304 { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
305 board_ahci }, /* ICH6M */
306 { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
307 board_ahci }, /* ICH7 */
308 { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
309 board_ahci }, /* ICH7M */
310 { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
311 board_ahci }, /* ICH7R */
312 { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
313 board_ahci }, /* ULi M5288 */
314 { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
315 board_ahci }, /* ESB2 */
316 { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
317 board_ahci }, /* ESB2 */
318 { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
319 board_ahci }, /* ESB2 */
320 { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
321 board_ahci }, /* ICH7-M DH */
322 { PCI_VENDOR_ID_INTEL, 0x2821, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
323 board_ahci }, /* ICH8 */
324 { PCI_VENDOR_ID_INTEL, 0x2822, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
325 board_ahci }, /* ICH8 */
326 { PCI_VENDOR_ID_INTEL, 0x2824, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
327 board_ahci }, /* ICH8 */
328 { PCI_VENDOR_ID_INTEL, 0x2829, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
329 board_ahci }, /* ICH8M */
330 { PCI_VENDOR_ID_INTEL, 0x282a, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
331 board_ahci }, /* ICH8M */
334 { 0x197b, 0x2360, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
335 board_ahci }, /* JMicron JMB360 */
336 { 0x197b, 0x2361, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
337 board_ahci }, /* JMicron JMB361 */
338 { 0x197b, 0x2363, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
339 board_ahci }, /* JMicron JMB363 */
340 { 0x197b, 0x2365, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
341 board_ahci }, /* JMicron JMB365 */
342 { 0x197b, 0x2366, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
343 board_ahci }, /* JMicron JMB366 */
346 { PCI_VENDOR_ID_ATI, 0x4380, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
347 board_ahci }, /* ATI SB600 non-raid */
348 { PCI_VENDOR_ID_ATI, 0x4381, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
349 board_ahci }, /* ATI SB600 raid */
352 { PCI_VENDOR_ID_VIA, 0x3349, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
353 board_ahci_vt8251 }, /* VIA VT8251 */
356 { PCI_VENDOR_ID_NVIDIA, 0x044c, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
357 board_ahci }, /* MCP65 */
358 { PCI_VENDOR_ID_NVIDIA, 0x044d, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
359 board_ahci }, /* MCP65 */
360 { PCI_VENDOR_ID_NVIDIA, 0x044e, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
361 board_ahci }, /* MCP65 */
362 { PCI_VENDOR_ID_NVIDIA, 0x044f, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
363 board_ahci }, /* MCP65 */
366 { PCI_VENDOR_ID_SI, 0x1184, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
367 board_ahci }, /* SiS 966 */
368 { PCI_VENDOR_ID_SI, 0x1185, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
369 board_ahci }, /* SiS 966 */
370 { PCI_VENDOR_ID_SI, 0x0186, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
371 board_ahci }, /* SiS 968 */
373 { } /* terminate list */
377 static struct pci_driver ahci_pci_driver = {
379 .id_table = ahci_pci_tbl,
380 .probe = ahci_init_one,
381 .suspend = ahci_pci_device_suspend,
382 .resume = ahci_pci_device_resume,
383 .remove = ahci_remove_one,
387 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
389 return base + 0x100 + (port * 0x80);
392 static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
394 return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
397 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
402 case SCR_STATUS: sc_reg = 0; break;
403 case SCR_CONTROL: sc_reg = 1; break;
404 case SCR_ERROR: sc_reg = 2; break;
405 case SCR_ACTIVE: sc_reg = 3; break;
410 return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
414 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
420 case SCR_STATUS: sc_reg = 0; break;
421 case SCR_CONTROL: sc_reg = 1; break;
422 case SCR_ERROR: sc_reg = 2; break;
423 case SCR_ACTIVE: sc_reg = 3; break;
428 writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
431 static void ahci_start_engine(void __iomem *port_mmio)
436 tmp = readl(port_mmio + PORT_CMD);
437 tmp |= PORT_CMD_START;
438 writel(tmp, port_mmio + PORT_CMD);
439 readl(port_mmio + PORT_CMD); /* flush */
442 static int ahci_stop_engine(void __iomem *port_mmio)
446 tmp = readl(port_mmio + PORT_CMD);
448 /* check if the HBA is idle */
449 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
452 /* setting HBA to idle */
453 tmp &= ~PORT_CMD_START;
454 writel(tmp, port_mmio + PORT_CMD);
456 /* wait for engine to stop. This could be as long as 500 msec */
457 tmp = ata_wait_register(port_mmio + PORT_CMD,
458 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
459 if (tmp & PORT_CMD_LIST_ON)
465 static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
466 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
470 /* set FIS registers */
471 if (cap & HOST_CAP_64)
472 writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
473 writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
475 if (cap & HOST_CAP_64)
476 writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
477 writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
479 /* enable FIS reception */
480 tmp = readl(port_mmio + PORT_CMD);
481 tmp |= PORT_CMD_FIS_RX;
482 writel(tmp, port_mmio + PORT_CMD);
485 readl(port_mmio + PORT_CMD);
488 static int ahci_stop_fis_rx(void __iomem *port_mmio)
492 /* disable FIS reception */
493 tmp = readl(port_mmio + PORT_CMD);
494 tmp &= ~PORT_CMD_FIS_RX;
495 writel(tmp, port_mmio + PORT_CMD);
497 /* wait for completion, spec says 500ms, give it 1000 */
498 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
499 PORT_CMD_FIS_ON, 10, 1000);
500 if (tmp & PORT_CMD_FIS_ON)
506 static void ahci_power_up(void __iomem *port_mmio, u32 cap)
510 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
513 if (cap & HOST_CAP_SSS) {
514 cmd |= PORT_CMD_SPIN_UP;
515 writel(cmd, port_mmio + PORT_CMD);
519 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
522 static void ahci_power_down(void __iomem *port_mmio, u32 cap)
526 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
528 if (cap & HOST_CAP_SSC) {
529 /* enable transitions to slumber mode */
530 scontrol = readl(port_mmio + PORT_SCR_CTL);
531 if ((scontrol & 0x0f00) > 0x100) {
533 writel(scontrol, port_mmio + PORT_SCR_CTL);
536 /* put device into slumber mode */
537 writel(cmd | PORT_CMD_ICC_SLUMBER, port_mmio + PORT_CMD);
539 /* wait for the transition to complete */
540 ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_ICC_SLUMBER,
541 PORT_CMD_ICC_SLUMBER, 1, 50);
544 /* put device into listen mode */
545 if (cap & HOST_CAP_SSS) {
546 /* first set PxSCTL.DET to 0 */
547 scontrol = readl(port_mmio + PORT_SCR_CTL);
549 writel(scontrol, port_mmio + PORT_SCR_CTL);
551 /* then set PxCMD.SUD to 0 */
552 cmd &= ~PORT_CMD_SPIN_UP;
553 writel(cmd, port_mmio + PORT_CMD);
557 static void ahci_init_port(void __iomem *port_mmio, u32 cap,
558 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
561 ahci_power_up(port_mmio, cap);
563 /* enable FIS reception */
564 ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
567 ahci_start_engine(port_mmio);
570 static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
575 rc = ahci_stop_engine(port_mmio);
577 *emsg = "failed to stop engine";
581 /* disable FIS reception */
582 rc = ahci_stop_fis_rx(port_mmio);
584 *emsg = "failed stop FIS RX";
588 /* put device into slumber mode */
589 ahci_power_down(port_mmio, cap);
594 static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev)
598 cap_save = readl(mmio + HOST_CAP);
599 cap_save &= ( (1<<28) | (1<<17) );
600 cap_save |= (1 << 27);
602 /* global controller reset */
603 tmp = readl(mmio + HOST_CTL);
604 if ((tmp & HOST_RESET) == 0) {
605 writel(tmp | HOST_RESET, mmio + HOST_CTL);
606 readl(mmio + HOST_CTL); /* flush */
609 /* reset must complete within 1 second, or
610 * the hardware should be considered fried.
614 tmp = readl(mmio + HOST_CTL);
615 if (tmp & HOST_RESET) {
616 dev_printk(KERN_ERR, &pdev->dev,
617 "controller reset failed (0x%x)\n", tmp);
621 writel(HOST_AHCI_EN, mmio + HOST_CTL);
622 (void) readl(mmio + HOST_CTL); /* flush */
623 writel(cap_save, mmio + HOST_CAP);
624 writel(0xf, mmio + HOST_PORTS_IMPL);
625 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
627 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
631 pci_read_config_word(pdev, 0x92, &tmp16);
633 pci_write_config_word(pdev, 0x92, tmp16);
639 static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
640 int n_ports, u32 cap)
645 for (i = 0; i < n_ports; i++) {
646 void __iomem *port_mmio = ahci_port_base(mmio, i);
647 const char *emsg = NULL;
649 #if 0 /* BIOSen initialize this incorrectly */
650 if (!(hpriv->port_map & (1 << i)))
654 /* make sure port is not active */
655 rc = ahci_deinit_port(port_mmio, cap, &emsg);
657 dev_printk(KERN_WARNING, &pdev->dev,
658 "%s (%d)\n", emsg, rc);
661 tmp = readl(port_mmio + PORT_SCR_ERR);
662 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
663 writel(tmp, port_mmio + PORT_SCR_ERR);
665 /* clear & turn off port IRQ */
666 tmp = readl(port_mmio + PORT_IRQ_STAT);
667 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
669 writel(tmp, port_mmio + PORT_IRQ_STAT);
671 writel(1 << i, mmio + HOST_IRQ_STAT);
672 writel(0, port_mmio + PORT_IRQ_MASK);
675 tmp = readl(mmio + HOST_CTL);
676 VPRINTK("HOST_CTL 0x%x\n", tmp);
677 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
678 tmp = readl(mmio + HOST_CTL);
679 VPRINTK("HOST_CTL 0x%x\n", tmp);
682 static unsigned int ahci_dev_classify(struct ata_port *ap)
684 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
685 struct ata_taskfile tf;
688 tmp = readl(port_mmio + PORT_SIG);
689 tf.lbah = (tmp >> 24) & 0xff;
690 tf.lbam = (tmp >> 16) & 0xff;
691 tf.lbal = (tmp >> 8) & 0xff;
692 tf.nsect = (tmp) & 0xff;
694 return ata_dev_classify(&tf);
697 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
700 dma_addr_t cmd_tbl_dma;
702 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
704 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
705 pp->cmd_slot[tag].status = 0;
706 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
707 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
710 static int ahci_clo(struct ata_port *ap)
712 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
713 struct ahci_host_priv *hpriv = ap->host_set->private_data;
716 if (!(hpriv->cap & HOST_CAP_CLO))
719 tmp = readl(port_mmio + PORT_CMD);
721 writel(tmp, port_mmio + PORT_CMD);
723 tmp = ata_wait_register(port_mmio + PORT_CMD,
724 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
725 if (tmp & PORT_CMD_CLO)
731 static int ahci_prereset(struct ata_port *ap)
733 if ((ap->flags & AHCI_FLAG_RESET_NEEDS_CLO) &&
734 (ata_busy_wait(ap, ATA_BUSY, 1000) & ATA_BUSY)) {
735 /* ATA_BUSY hasn't cleared, so send a CLO */
739 return ata_std_prereset(ap);
742 static int ahci_softreset(struct ata_port *ap, unsigned int *class)
744 struct ahci_port_priv *pp = ap->private_data;
745 void __iomem *mmio = ap->host_set->mmio_base;
746 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
747 const u32 cmd_fis_len = 5; /* five dwords */
748 const char *reason = NULL;
749 struct ata_taskfile tf;
756 if (ata_port_offline(ap)) {
757 DPRINTK("PHY reports no device\n");
758 *class = ATA_DEV_NONE;
762 /* prepare for SRST (AHCI-1.1 10.4.1) */
763 rc = ahci_stop_engine(port_mmio);
765 reason = "failed to stop engine";
769 /* check BUSY/DRQ, perform Command List Override if necessary */
770 ahci_tf_read(ap, &tf);
771 if (tf.command & (ATA_BUSY | ATA_DRQ)) {
774 if (rc == -EOPNOTSUPP) {
775 reason = "port busy but CLO unavailable";
778 reason = "port busy but CLO failed";
784 ahci_start_engine(port_mmio);
786 ata_tf_init(ap->device, &tf);
789 /* issue the first D2H Register FIS */
790 ahci_fill_cmd_slot(pp, 0,
791 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
794 ata_tf_to_fis(&tf, fis, 0);
795 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
797 writel(1, port_mmio + PORT_CMD_ISSUE);
799 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
802 reason = "1st FIS failed";
806 /* spec says at least 5us, but be generous and sleep for 1ms */
809 /* issue the second D2H Register FIS */
810 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
813 ata_tf_to_fis(&tf, fis, 0);
814 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
816 writel(1, port_mmio + PORT_CMD_ISSUE);
817 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
819 /* spec mandates ">= 2ms" before checking status.
820 * We wait 150ms, because that was the magic delay used for
821 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
822 * between when the ATA command register is written, and then
823 * status is checked. Because waiting for "a while" before
824 * checking status is fine, post SRST, we perform this magic
825 * delay here as well.
829 *class = ATA_DEV_NONE;
830 if (ata_port_online(ap)) {
831 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
833 reason = "device not ready";
836 *class = ahci_dev_classify(ap);
839 DPRINTK("EXIT, class=%u\n", *class);
843 ahci_start_engine(port_mmio);
845 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
849 static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
851 struct ahci_port_priv *pp = ap->private_data;
852 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
853 struct ata_taskfile tf;
854 void __iomem *mmio = ap->host_set->mmio_base;
855 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
860 ahci_stop_engine(port_mmio);
862 /* clear D2H reception area to properly wait for D2H FIS */
863 ata_tf_init(ap->device, &tf);
865 ata_tf_to_fis(&tf, d2h_fis, 0);
867 rc = sata_std_hardreset(ap, class);
869 ahci_start_engine(port_mmio);
871 if (rc == 0 && ata_port_online(ap))
872 *class = ahci_dev_classify(ap);
873 if (*class == ATA_DEV_UNKNOWN)
874 *class = ATA_DEV_NONE;
876 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
880 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
882 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
885 ata_std_postreset(ap, class);
887 /* Make sure port's ATAPI bit is set appropriately */
888 new_tmp = tmp = readl(port_mmio + PORT_CMD);
889 if (*class == ATA_DEV_ATAPI)
890 new_tmp |= PORT_CMD_ATAPI;
892 new_tmp &= ~PORT_CMD_ATAPI;
893 if (new_tmp != tmp) {
894 writel(new_tmp, port_mmio + PORT_CMD);
895 readl(port_mmio + PORT_CMD); /* flush */
899 static u8 ahci_check_status(struct ata_port *ap)
901 void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
903 return readl(mmio + PORT_TFDATA) & 0xFF;
906 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
908 struct ahci_port_priv *pp = ap->private_data;
909 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
911 ata_tf_from_fis(d2h_fis, tf);
914 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
916 struct scatterlist *sg;
917 struct ahci_sg *ahci_sg;
918 unsigned int n_sg = 0;
923 * Next, the S/G list.
925 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
926 ata_for_each_sg(sg, qc) {
927 dma_addr_t addr = sg_dma_address(sg);
928 u32 sg_len = sg_dma_len(sg);
930 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
931 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
932 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
941 static void ahci_qc_prep(struct ata_queued_cmd *qc)
943 struct ata_port *ap = qc->ap;
944 struct ahci_port_priv *pp = ap->private_data;
945 int is_atapi = is_atapi_taskfile(&qc->tf);
948 const u32 cmd_fis_len = 5; /* five dwords */
952 * Fill in command table information. First, the header,
953 * a SATA Register - Host to Device command FIS.
955 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
957 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
959 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
960 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
964 if (qc->flags & ATA_QCFLAG_DMAMAP)
965 n_elem = ahci_fill_sg(qc, cmd_tbl);
968 * Fill in command slot information.
970 opts = cmd_fis_len | n_elem << 16;
971 if (qc->tf.flags & ATA_TFLAG_WRITE)
972 opts |= AHCI_CMD_WRITE;
974 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
976 ahci_fill_cmd_slot(pp, qc->tag, opts);
979 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
981 struct ahci_port_priv *pp = ap->private_data;
982 struct ata_eh_info *ehi = &ap->eh_info;
983 unsigned int err_mask = 0, action = 0;
984 struct ata_queued_cmd *qc;
987 ata_ehi_clear_desc(ehi);
989 /* AHCI needs SError cleared; otherwise, it might lock up */
990 serror = ahci_scr_read(ap, SCR_ERROR);
991 ahci_scr_write(ap, SCR_ERROR, serror);
993 /* analyze @irq_stat */
994 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
996 if (irq_stat & PORT_IRQ_TF_ERR)
997 err_mask |= AC_ERR_DEV;
999 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1000 err_mask |= AC_ERR_HOST_BUS;
1001 action |= ATA_EH_SOFTRESET;
1004 if (irq_stat & PORT_IRQ_IF_ERR) {
1005 err_mask |= AC_ERR_ATA_BUS;
1006 action |= ATA_EH_SOFTRESET;
1007 ata_ehi_push_desc(ehi, ", interface fatal error");
1010 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1011 ata_ehi_hotplugged(ehi);
1012 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
1013 "connection status changed" : "PHY RDY changed");
1016 if (irq_stat & PORT_IRQ_UNK_FIS) {
1017 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1019 err_mask |= AC_ERR_HSM;
1020 action |= ATA_EH_SOFTRESET;
1021 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
1022 unk[0], unk[1], unk[2], unk[3]);
1025 /* okay, let's hand over to EH */
1026 ehi->serror |= serror;
1027 ehi->action |= action;
1029 qc = ata_qc_from_tag(ap, ap->active_tag);
1031 qc->err_mask |= err_mask;
1033 ehi->err_mask |= err_mask;
1035 if (irq_stat & PORT_IRQ_FREEZE)
1036 ata_port_freeze(ap);
1041 static void ahci_host_intr(struct ata_port *ap)
1043 void __iomem *mmio = ap->host_set->mmio_base;
1044 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1045 struct ata_eh_info *ehi = &ap->eh_info;
1046 u32 status, qc_active;
1049 status = readl(port_mmio + PORT_IRQ_STAT);
1050 writel(status, port_mmio + PORT_IRQ_STAT);
1052 if (unlikely(status & PORT_IRQ_ERROR)) {
1053 ahci_error_intr(ap, status);
1058 qc_active = readl(port_mmio + PORT_SCR_ACT);
1060 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1062 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1066 ehi->err_mask |= AC_ERR_HSM;
1067 ehi->action |= ATA_EH_SOFTRESET;
1068 ata_port_freeze(ap);
1072 /* hmmm... a spurious interupt */
1074 /* some devices send D2H reg with I bit set during NCQ command phase */
1075 if (ap->sactive && status & PORT_IRQ_D2H_REG_FIS)
1078 /* ignore interim PIO setup fis interrupts */
1079 if (ata_tag_valid(ap->active_tag)) {
1080 struct ata_queued_cmd *qc =
1081 ata_qc_from_tag(ap, ap->active_tag);
1083 if (qc && qc->tf.protocol == ATA_PROT_PIO &&
1084 (status & PORT_IRQ_PIOS_FIS))
1088 if (ata_ratelimit())
1089 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1090 "(irq_stat 0x%x active_tag %d sactive 0x%x)\n",
1091 status, ap->active_tag, ap->sactive);
1094 static void ahci_irq_clear(struct ata_port *ap)
1099 static irqreturn_t ahci_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
1101 struct ata_host_set *host_set = dev_instance;
1102 struct ahci_host_priv *hpriv;
1103 unsigned int i, handled = 0;
1105 u32 irq_stat, irq_ack = 0;
1109 hpriv = host_set->private_data;
1110 mmio = host_set->mmio_base;
1112 /* sigh. 0xffffffff is a valid return from h/w */
1113 irq_stat = readl(mmio + HOST_IRQ_STAT);
1114 irq_stat &= hpriv->port_map;
1118 spin_lock(&host_set->lock);
1120 for (i = 0; i < host_set->n_ports; i++) {
1121 struct ata_port *ap;
1123 if (!(irq_stat & (1 << i)))
1126 ap = host_set->ports[i];
1129 VPRINTK("port %u\n", i);
1131 VPRINTK("port %u (no irq)\n", i);
1132 if (ata_ratelimit())
1133 dev_printk(KERN_WARNING, host_set->dev,
1134 "interrupt on disabled port %u\n", i);
1137 irq_ack |= (1 << i);
1141 writel(irq_ack, mmio + HOST_IRQ_STAT);
1145 spin_unlock(&host_set->lock);
1149 return IRQ_RETVAL(handled);
1152 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1154 struct ata_port *ap = qc->ap;
1155 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
1157 if (qc->tf.protocol == ATA_PROT_NCQ)
1158 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1159 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1160 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1165 static void ahci_freeze(struct ata_port *ap)
1167 void __iomem *mmio = ap->host_set->mmio_base;
1168 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1171 writel(0, port_mmio + PORT_IRQ_MASK);
1174 static void ahci_thaw(struct ata_port *ap)
1176 void __iomem *mmio = ap->host_set->mmio_base;
1177 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1181 tmp = readl(port_mmio + PORT_IRQ_STAT);
1182 writel(tmp, port_mmio + PORT_IRQ_STAT);
1183 writel(1 << ap->id, mmio + HOST_IRQ_STAT);
1185 /* turn IRQ back on */
1186 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1189 static void ahci_error_handler(struct ata_port *ap)
1191 void __iomem *mmio = ap->host_set->mmio_base;
1192 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1194 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1195 /* restart engine */
1196 ahci_stop_engine(port_mmio);
1197 ahci_start_engine(port_mmio);
1200 /* perform recovery */
1201 ata_do_eh(ap, ahci_prereset, ahci_softreset, ahci_hardreset,
1205 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1207 struct ata_port *ap = qc->ap;
1208 void __iomem *mmio = ap->host_set->mmio_base;
1209 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1211 if (qc->flags & ATA_QCFLAG_FAILED)
1212 qc->err_mask |= AC_ERR_OTHER;
1215 /* make DMA engine forget about the failed command */
1216 ahci_stop_engine(port_mmio);
1217 ahci_start_engine(port_mmio);
1221 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1223 struct ahci_host_priv *hpriv = ap->host_set->private_data;
1224 struct ahci_port_priv *pp = ap->private_data;
1225 void __iomem *mmio = ap->host_set->mmio_base;
1226 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1227 const char *emsg = NULL;
1230 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1232 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1233 ahci_init_port(port_mmio, hpriv->cap,
1234 pp->cmd_slot_dma, pp->rx_fis_dma);
1240 static int ahci_port_resume(struct ata_port *ap)
1242 struct ahci_port_priv *pp = ap->private_data;
1243 struct ahci_host_priv *hpriv = ap->host_set->private_data;
1244 void __iomem *mmio = ap->host_set->mmio_base;
1245 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1247 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1252 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1254 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
1255 void __iomem *mmio = host_set->mmio_base;
1258 if (mesg.event == PM_EVENT_SUSPEND) {
1259 /* AHCI spec rev1.1 section 8.3.3:
1260 * Software must disable interrupts prior to requesting a
1261 * transition of the HBA to D3 state.
1263 ctl = readl(mmio + HOST_CTL);
1264 ctl &= ~HOST_IRQ_EN;
1265 writel(ctl, mmio + HOST_CTL);
1266 readl(mmio + HOST_CTL); /* flush */
1269 return ata_pci_device_suspend(pdev, mesg);
1272 static int ahci_pci_device_resume(struct pci_dev *pdev)
1274 struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
1275 struct ahci_host_priv *hpriv = host_set->private_data;
1276 void __iomem *mmio = host_set->mmio_base;
1279 ata_pci_device_do_resume(pdev);
1281 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1282 rc = ahci_reset_controller(mmio, pdev);
1286 ahci_init_controller(mmio, pdev, host_set->n_ports, hpriv->cap);
1289 ata_host_set_resume(host_set);
1294 static int ahci_port_start(struct ata_port *ap)
1296 struct device *dev = ap->host_set->dev;
1297 struct ahci_host_priv *hpriv = ap->host_set->private_data;
1298 struct ahci_port_priv *pp;
1299 void __iomem *mmio = ap->host_set->mmio_base;
1300 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1305 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
1308 memset(pp, 0, sizeof(*pp));
1310 rc = ata_pad_alloc(ap, dev);
1316 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
1318 ata_pad_free(ap, dev);
1322 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1325 * First item in chunk of DMA memory: 32-slot command table,
1326 * 32 bytes each in size
1329 pp->cmd_slot_dma = mem_dma;
1331 mem += AHCI_CMD_SLOT_SZ;
1332 mem_dma += AHCI_CMD_SLOT_SZ;
1335 * Second item: Received-FIS area
1338 pp->rx_fis_dma = mem_dma;
1340 mem += AHCI_RX_FIS_SZ;
1341 mem_dma += AHCI_RX_FIS_SZ;
1344 * Third item: data area for storing a single command
1345 * and its scatter-gather table
1348 pp->cmd_tbl_dma = mem_dma;
1350 ap->private_data = pp;
1352 /* initialize port */
1353 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1358 static void ahci_port_stop(struct ata_port *ap)
1360 struct device *dev = ap->host_set->dev;
1361 struct ahci_host_priv *hpriv = ap->host_set->private_data;
1362 struct ahci_port_priv *pp = ap->private_data;
1363 void __iomem *mmio = ap->host_set->mmio_base;
1364 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1365 const char *emsg = NULL;
1368 /* de-initialize port */
1369 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1371 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1373 ap->private_data = NULL;
1374 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
1375 pp->cmd_slot, pp->cmd_slot_dma);
1376 ata_pad_free(ap, dev);
1380 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
1381 unsigned int port_idx)
1383 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
1384 base = ahci_port_base_ul(base, port_idx);
1385 VPRINTK("base now==0x%lx\n", base);
1387 port->cmd_addr = base;
1388 port->scr_addr = base + PORT_SCR;
1393 static int ahci_host_init(struct ata_probe_ent *probe_ent)
1395 struct ahci_host_priv *hpriv = probe_ent->private_data;
1396 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1397 void __iomem *mmio = probe_ent->mmio_base;
1398 unsigned int i, using_dac;
1401 rc = ahci_reset_controller(mmio, pdev);
1405 hpriv->cap = readl(mmio + HOST_CAP);
1406 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
1407 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
1409 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1410 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
1412 using_dac = hpriv->cap & HOST_CAP_64;
1414 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1415 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1417 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1419 dev_printk(KERN_ERR, &pdev->dev,
1420 "64-bit DMA enable failed\n");
1425 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1427 dev_printk(KERN_ERR, &pdev->dev,
1428 "32-bit DMA enable failed\n");
1431 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1433 dev_printk(KERN_ERR, &pdev->dev,
1434 "32-bit consistent DMA enable failed\n");
1439 for (i = 0; i < probe_ent->n_ports; i++)
1440 ahci_setup_port(&probe_ent->port[i], (unsigned long) mmio, i);
1442 ahci_init_controller(mmio, pdev, probe_ent->n_ports, hpriv->cap);
1444 pci_set_master(pdev);
1449 static void ahci_print_info(struct ata_probe_ent *probe_ent)
1451 struct ahci_host_priv *hpriv = probe_ent->private_data;
1452 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1453 void __iomem *mmio = probe_ent->mmio_base;
1454 u32 vers, cap, impl, speed;
1455 const char *speed_s;
1459 vers = readl(mmio + HOST_VERSION);
1461 impl = hpriv->port_map;
1463 speed = (cap >> 20) & 0xf;
1466 else if (speed == 2)
1471 pci_read_config_word(pdev, 0x0a, &cc);
1474 else if (cc == 0x0106)
1476 else if (cc == 0x0104)
1481 dev_printk(KERN_INFO, &pdev->dev,
1482 "AHCI %02x%02x.%02x%02x "
1483 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1486 (vers >> 24) & 0xff,
1487 (vers >> 16) & 0xff,
1491 ((cap >> 8) & 0x1f) + 1,
1497 dev_printk(KERN_INFO, &pdev->dev,
1503 cap & (1 << 31) ? "64bit " : "",
1504 cap & (1 << 30) ? "ncq " : "",
1505 cap & (1 << 28) ? "ilck " : "",
1506 cap & (1 << 27) ? "stag " : "",
1507 cap & (1 << 26) ? "pm " : "",
1508 cap & (1 << 25) ? "led " : "",
1510 cap & (1 << 24) ? "clo " : "",
1511 cap & (1 << 19) ? "nz " : "",
1512 cap & (1 << 18) ? "only " : "",
1513 cap & (1 << 17) ? "pmp " : "",
1514 cap & (1 << 15) ? "pio " : "",
1515 cap & (1 << 14) ? "slum " : "",
1516 cap & (1 << 13) ? "part " : ""
1520 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1522 static int printed_version;
1523 struct ata_probe_ent *probe_ent = NULL;
1524 struct ahci_host_priv *hpriv;
1526 void __iomem *mmio_base;
1527 unsigned int board_idx = (unsigned int) ent->driver_data;
1528 int have_msi, pci_dev_busy = 0;
1533 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1535 if (!printed_version++)
1536 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1538 /* JMicron-specific fixup: make sure we're in AHCI mode */
1539 /* This is protected from races with ata_jmicron by the pci probe
1541 if (pdev->vendor == PCI_VENDOR_ID_JMICRON) {
1542 /* AHCI enable, AHCI on function 0 */
1543 pci_write_config_byte(pdev, 0x41, 0xa1);
1544 /* Function 1 is the PATA controller */
1545 if (PCI_FUNC(pdev->devfn))
1549 rc = pci_enable_device(pdev);
1553 rc = pci_request_regions(pdev, DRV_NAME);
1559 if (pci_enable_msi(pdev) == 0)
1566 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1567 if (probe_ent == NULL) {
1572 memset(probe_ent, 0, sizeof(*probe_ent));
1573 probe_ent->dev = pci_dev_to_dev(pdev);
1574 INIT_LIST_HEAD(&probe_ent->node);
1576 mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
1577 if (mmio_base == NULL) {
1579 goto err_out_free_ent;
1581 base = (unsigned long) mmio_base;
1583 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1586 goto err_out_iounmap;
1588 memset(hpriv, 0, sizeof(*hpriv));
1590 probe_ent->sht = ahci_port_info[board_idx].sht;
1591 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
1592 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1593 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1594 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1596 probe_ent->irq = pdev->irq;
1597 probe_ent->irq_flags = IRQF_SHARED;
1598 probe_ent->mmio_base = mmio_base;
1599 probe_ent->private_data = hpriv;
1602 hpriv->flags |= AHCI_FLAG_MSI;
1604 /* initialize adapter */
1605 rc = ahci_host_init(probe_ent);
1609 if (!(probe_ent->host_flags & AHCI_FLAG_NO_NCQ) &&
1610 (hpriv->cap & HOST_CAP_NCQ))
1611 probe_ent->host_flags |= ATA_FLAG_NCQ;
1613 ahci_print_info(probe_ent);
1615 /* FIXME: check ata_device_add return value */
1616 ata_device_add(probe_ent);
1624 pci_iounmap(pdev, mmio_base);
1629 pci_disable_msi(pdev);
1632 pci_release_regions(pdev);
1635 pci_disable_device(pdev);
1639 static void ahci_remove_one (struct pci_dev *pdev)
1641 struct device *dev = pci_dev_to_dev(pdev);
1642 struct ata_host_set *host_set = dev_get_drvdata(dev);
1643 struct ahci_host_priv *hpriv = host_set->private_data;
1647 for (i = 0; i < host_set->n_ports; i++)
1648 ata_port_detach(host_set->ports[i]);
1650 have_msi = hpriv->flags & AHCI_FLAG_MSI;
1651 free_irq(host_set->irq, host_set);
1653 for (i = 0; i < host_set->n_ports; i++) {
1654 struct ata_port *ap = host_set->ports[i];
1656 ata_scsi_release(ap->host);
1657 scsi_host_put(ap->host);
1661 pci_iounmap(pdev, host_set->mmio_base);
1665 pci_disable_msi(pdev);
1668 pci_release_regions(pdev);
1669 pci_disable_device(pdev);
1670 dev_set_drvdata(dev, NULL);
1673 static int __init ahci_init(void)
1675 return pci_module_init(&ahci_pci_driver);
1678 static void __exit ahci_exit(void)
1680 pci_unregister_driver(&ahci_pci_driver);
1684 MODULE_AUTHOR("Jeff Garzik");
1685 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1686 MODULE_LICENSE("GPL");
1687 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1688 MODULE_VERSION(DRV_VERSION);
1690 module_init(ahci_init);
1691 module_exit(ahci_exit);