--- /dev/null
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/* Copyright (c) 2020 The Linux Foundation. All rights reserved. */
+
+#include <linux/msi.h>
+#include <linux/pci.h>
+
+#include "core.h"
+#include "debug.h"
+#include "mhi.h"
+
+#define MHI_TIMEOUT_DEFAULT_MS 90000
+
+static struct mhi_channel_config ath11k_mhi_channels[] = {
+ {
+ .num = 0,
+ .name = "LOOPBACK",
+ .num_elements = 32,
+ .event_ring = 0,
+ .dir = DMA_TO_DEVICE,
+ .ee_mask = 0x4,
+ .pollcfg = 0,
+ .doorbell = MHI_DB_BRST_DISABLE,
+ .lpm_notify = false,
+ .offload_channel = false,
+ .doorbell_mode_switch = false,
+ .auto_queue = false,
+ .auto_start = false,
+ },
+ {
+ .num = 1,
+ .name = "LOOPBACK",
+ .num_elements = 32,
+ .event_ring = 0,
+ .dir = DMA_FROM_DEVICE,
+ .ee_mask = 0x4,
+ .pollcfg = 0,
+ .doorbell = MHI_DB_BRST_DISABLE,
+ .lpm_notify = false,
+ .offload_channel = false,
+ .doorbell_mode_switch = false,
+ .auto_queue = false,
+ .auto_start = false,
+ },
+ {
+ .num = 20,
+ .name = "IPCR",
+ .num_elements = 64,
+ .event_ring = 1,
+ .dir = DMA_TO_DEVICE,
+ .ee_mask = 0x4,
+ .pollcfg = 0,
+ .doorbell = MHI_DB_BRST_DISABLE,
+ .lpm_notify = false,
+ .offload_channel = false,
+ .doorbell_mode_switch = false,
+ .auto_queue = false,
+ .auto_start = true,
+ },
+ {
+ .num = 21,
+ .name = "IPCR",
+ .num_elements = 64,
+ .event_ring = 1,
+ .dir = DMA_FROM_DEVICE,
+ .ee_mask = 0x4,
+ .pollcfg = 0,
+ .doorbell = MHI_DB_BRST_DISABLE,
+ .lpm_notify = false,
+ .offload_channel = false,
+ .doorbell_mode_switch = false,
+ .auto_queue = true,
+ .auto_start = true,
+ },
+};
+
+static struct mhi_event_config ath11k_mhi_events[] = {
+ {
+ .num_elements = 32,
+ .irq_moderation_ms = 0,
+ .irq = 1,
+ .mode = MHI_DB_BRST_DISABLE,
+ .data_type = MHI_ER_CTRL,
+ .hardware_event = false,
+ .client_managed = false,
+ .offload_channel = false,
+ },
+ {
+ .num_elements = 256,
+ .irq_moderation_ms = 1,
+ .irq = 2,
+ .mode = MHI_DB_BRST_DISABLE,
+ .priority = 1,
+ .hardware_event = false,
+ .client_managed = false,
+ .offload_channel = false,
+ },
+};
+
+static struct mhi_controller_config ath11k_mhi_config = {
+ .max_channels = 128,
+ .timeout_ms = 2000,
+ .use_bounce_buf = false,
+ .buf_len = 0,
+ .num_channels = ARRAY_SIZE(ath11k_mhi_channels),
+ .ch_cfg = ath11k_mhi_channels,
+ .num_events = ARRAY_SIZE(ath11k_mhi_events),
+ .event_cfg = ath11k_mhi_events,
+};
+
+static int ath11k_mhi_get_msi(struct ath11k_pci *ab_pci)
+{
+ struct ath11k_base *ab = ab_pci->ab;
+ u32 user_base_data, base_vector;
+ int ret, num_vectors, i;
+ int *irq;
+
+ ret = ath11k_pci_get_user_msi_assignment(ab_pci,
+ "MHI", &num_vectors,
+ &user_base_data, &base_vector);
+ if (ret)
+ return ret;
+
+ ath11k_dbg(ab, ATH11K_DBG_PCI, "Number of assigned MSI for MHI is %d, base vector is %d\n",
+ num_vectors, base_vector);
+
+ irq = kcalloc(num_vectors, sizeof(int), GFP_KERNEL);
+ if (!irq)
+ return -ENOMEM;
+
+ for (i = 0; i < num_vectors; i++)
+ irq[i] = ath11k_pci_get_msi_irq(ab->dev,
+ base_vector + i);
+
+ ab_pci->mhi_ctrl->irq = irq;
+ ab_pci->mhi_ctrl->nr_irqs = num_vectors;
+
+ return 0;
+}
+
+static int ath11k_mhi_op_runtime_get(struct mhi_controller *mhi_cntrl)
+{
+ return 0;
+}
+
+static void ath11k_mhi_op_runtime_put(struct mhi_controller *mhi_cntrl)
+{
+}
+
+static void ath11k_mhi_op_status_cb(struct mhi_controller *mhi_cntrl,
+ enum mhi_callback cb)
+{
+}
+
+static int ath11k_mhi_op_read_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *addr,
+ u32 *out)
+{
+ *out = readl(addr);
+
+ return 0;
+}
+
+static void ath11k_mhi_op_write_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *addr,
+ u32 val)
+{
+ writel(val, addr);
+}
+
+int ath11k_mhi_register(struct ath11k_pci *ab_pci)
+{
+ struct ath11k_base *ab = ab_pci->ab;
+ struct mhi_controller *mhi_ctrl;
+ int ret;
+
+ mhi_ctrl = kzalloc(sizeof(*mhi_ctrl), GFP_KERNEL);
+ if (!mhi_ctrl)
+ return PTR_ERR(mhi_ctrl);
+
+ ath11k_core_create_firmware_path(ab, ATH11K_AMSS_FILE,
+ ab_pci->amss_path,
+ sizeof(ab_pci->amss_path));
+
+ ab_pci->mhi_ctrl = mhi_ctrl;
+ mhi_ctrl->cntrl_dev = ab->dev;
+ mhi_ctrl->fw_image = ab_pci->amss_path;
+ mhi_ctrl->regs = ab->mem;
+
+ ret = ath11k_mhi_get_msi(ab_pci);
+ if (ret) {
+ ath11k_err(ab, "failed to get msi for mhi\n");
+ kfree(mhi_ctrl);
+ return ret;
+ }
+
+ mhi_ctrl->iova_start = 0;
+ mhi_ctrl->iova_stop = 0xffffffff;
+ mhi_ctrl->sbl_size = SZ_512K;
+ mhi_ctrl->seg_len = SZ_512K;
+ mhi_ctrl->fbc_download = true;
+ mhi_ctrl->runtime_get = ath11k_mhi_op_runtime_get;
+ mhi_ctrl->runtime_put = ath11k_mhi_op_runtime_put;
+ mhi_ctrl->status_cb = ath11k_mhi_op_status_cb;
+ mhi_ctrl->read_reg = ath11k_mhi_op_read_reg;
+ mhi_ctrl->write_reg = ath11k_mhi_op_write_reg;
+
+ ret = mhi_register_controller(mhi_ctrl, &ath11k_mhi_config);
+ if (ret) {
+ ath11k_err(ab, "failed to register to mhi bus, err = %d\n", ret);
+ kfree(mhi_ctrl);
+ return ret;
+ }
+
+ return 0;
+}
+
+void ath11k_mhi_unregister(struct ath11k_pci *ab_pci)
+{
+ struct mhi_controller *mhi_ctrl = ab_pci->mhi_ctrl;
+
+ mhi_unregister_controller(mhi_ctrl);
+ kfree(mhi_ctrl->irq);
+}
+
+static char *ath11k_mhi_state_to_str(enum ath11k_mhi_state mhi_state)
+{
+ switch (mhi_state) {
+ case ATH11K_MHI_INIT:
+ return "INIT";
+ case ATH11K_MHI_DEINIT:
+ return "DEINIT";
+ case ATH11K_MHI_POWER_ON:
+ return "POWER_ON";
+ case ATH11K_MHI_POWER_OFF:
+ return "POWER_OFF";
+ case ATH11K_MHI_FORCE_POWER_OFF:
+ return "FORCE_POWER_OFF";
+ case ATH11K_MHI_SUSPEND:
+ return "SUSPEND";
+ case ATH11K_MHI_RESUME:
+ return "RESUME";
+ case ATH11K_MHI_TRIGGER_RDDM:
+ return "TRIGGER_RDDM";
+ case ATH11K_MHI_RDDM_DONE:
+ return "RDDM_DONE";
+ default:
+ return "UNKNOWN";
+ }
+};
+
+static void ath11k_mhi_set_state_bit(struct ath11k_pci *ab_pci,
+ enum ath11k_mhi_state mhi_state)
+{
+ struct ath11k_base *ab = ab_pci->ab;
+
+ switch (mhi_state) {
+ case ATH11K_MHI_INIT:
+ set_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state);
+ break;
+ case ATH11K_MHI_DEINIT:
+ clear_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state);
+ break;
+ case ATH11K_MHI_POWER_ON:
+ set_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state);
+ break;
+ case ATH11K_MHI_POWER_OFF:
+ case ATH11K_MHI_FORCE_POWER_OFF:
+ clear_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state);
+ clear_bit(ATH11K_MHI_TRIGGER_RDDM, &ab_pci->mhi_state);
+ clear_bit(ATH11K_MHI_RDDM_DONE, &ab_pci->mhi_state);
+ break;
+ case ATH11K_MHI_SUSPEND:
+ set_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state);
+ break;
+ case ATH11K_MHI_RESUME:
+ clear_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state);
+ break;
+ case ATH11K_MHI_TRIGGER_RDDM:
+ set_bit(ATH11K_MHI_TRIGGER_RDDM, &ab_pci->mhi_state);
+ break;
+ case ATH11K_MHI_RDDM_DONE:
+ set_bit(ATH11K_MHI_RDDM_DONE, &ab_pci->mhi_state);
+ break;
+ default:
+ ath11k_err(ab, "unhandled mhi state (%d)\n", mhi_state);
+ }
+}
+
+static int ath11k_mhi_check_state_bit(struct ath11k_pci *ab_pci,
+ enum ath11k_mhi_state mhi_state)
+{
+ struct ath11k_base *ab = ab_pci->ab;
+
+ switch (mhi_state) {
+ case ATH11K_MHI_INIT:
+ if (!test_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state))
+ return 0;
+ break;
+ case ATH11K_MHI_DEINIT:
+ case ATH11K_MHI_POWER_ON:
+ if (test_bit(ATH11K_MHI_INIT, &ab_pci->mhi_state) &&
+ !test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state))
+ return 0;
+ break;
+ case ATH11K_MHI_FORCE_POWER_OFF:
+ if (test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state))
+ return 0;
+ break;
+ case ATH11K_MHI_POWER_OFF:
+ case ATH11K_MHI_SUSPEND:
+ if (test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state) &&
+ !test_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state))
+ return 0;
+ break;
+ case ATH11K_MHI_RESUME:
+ if (test_bit(ATH11K_MHI_SUSPEND, &ab_pci->mhi_state))
+ return 0;
+ break;
+ case ATH11K_MHI_TRIGGER_RDDM:
+ if (test_bit(ATH11K_MHI_POWER_ON, &ab_pci->mhi_state) &&
+ !test_bit(ATH11K_MHI_TRIGGER_RDDM, &ab_pci->mhi_state))
+ return 0;
+ break;
+ case ATH11K_MHI_RDDM_DONE:
+ return 0;
+ default:
+ ath11k_err(ab, "unhandled mhi state: %s(%d)\n",
+ ath11k_mhi_state_to_str(mhi_state), mhi_state);
+ }
+
+ ath11k_err(ab, "failed to set mhi state %s(%d) in current mhi state (0x%lx)\n",
+ ath11k_mhi_state_to_str(mhi_state), mhi_state,
+ ab_pci->mhi_state);
+
+ return -EINVAL;
+}
+
+static int ath11k_mhi_set_state(struct ath11k_pci *ab_pci,
+ enum ath11k_mhi_state mhi_state)
+{
+ struct ath11k_base *ab = ab_pci->ab;
+ int ret;
+
+ ret = ath11k_mhi_check_state_bit(ab_pci, mhi_state);
+ if (ret)
+ goto out;
+
+ ath11k_dbg(ab, ATH11K_DBG_PCI, "setting mhi state: %s(%d)\n",
+ ath11k_mhi_state_to_str(mhi_state), mhi_state);
+
+ switch (mhi_state) {
+ case ATH11K_MHI_INIT:
+ ret = mhi_prepare_for_power_up(ab_pci->mhi_ctrl);
+ break;
+ case ATH11K_MHI_DEINIT:
+ mhi_unprepare_after_power_down(ab_pci->mhi_ctrl);
+ ret = 0;
+ break;
+ case ATH11K_MHI_POWER_ON:
+ ret = mhi_async_power_up(ab_pci->mhi_ctrl);
+ break;
+ case ATH11K_MHI_POWER_OFF:
+ mhi_power_down(ab_pci->mhi_ctrl, true);
+ ret = 0;
+ break;
+ case ATH11K_MHI_FORCE_POWER_OFF:
+ mhi_power_down(ab_pci->mhi_ctrl, false);
+ ret = 0;
+ break;
+ case ATH11K_MHI_SUSPEND:
+ break;
+ case ATH11K_MHI_RESUME:
+ break;
+ case ATH11K_MHI_TRIGGER_RDDM:
+ ret = mhi_force_rddm_mode(ab_pci->mhi_ctrl);
+ break;
+ case ATH11K_MHI_RDDM_DONE:
+ break;
+ default:
+ ath11k_err(ab, "unhandled MHI state (%d)\n", mhi_state);
+ ret = -EINVAL;
+ }
+
+ if (ret)
+ goto out;
+
+ ath11k_mhi_set_state_bit(ab_pci, mhi_state);
+
+ return 0;
+
+out:
+ ath11k_err(ab, "failed to set mhi state: %s(%d)\n",
+ ath11k_mhi_state_to_str(mhi_state), mhi_state);
+ return ret;
+}
+
+int ath11k_mhi_start(struct ath11k_pci *ab_pci)
+{
+ int ret;
+
+ ab_pci->mhi_ctrl->timeout_ms = MHI_TIMEOUT_DEFAULT_MS;
+
+ ret = ath11k_mhi_set_state(ab_pci, ATH11K_MHI_INIT);
+ if (ret)
+ goto out;
+
+ ret = ath11k_mhi_set_state(ab_pci, ATH11K_MHI_POWER_ON);
+ if (ret)
+ goto out;
+
+ return 0;
+
+out:
+ return ret;
+}
+
+void ath11k_mhi_stop(struct ath11k_pci *ab_pci)
+{
+ ath11k_mhi_set_state(ab_pci, ATH11K_MHI_RESUME);
+ ath11k_mhi_set_state(ab_pci, ATH11K_MHI_POWER_OFF);
+ ath11k_mhi_set_state(ab_pci, ATH11K_MHI_DEINIT);
+}
+
#include "pci.h"
#include "core.h"
+#include "hif.h"
+#include "mhi.h"
#include "debug.h"
#define ATH11K_PCI_BAR_NUM 0
},
};
+int ath11k_pci_get_msi_irq(struct device *dev, unsigned int vector)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+
+ return pci_irq_vector(pci_dev, vector);
+}
+
+int ath11k_pci_get_user_msi_assignment(struct ath11k_pci *ab_pci, char *user_name,
+ int *num_vectors, u32 *user_base_data,
+ u32 *base_vector)
+{
+ struct ath11k_base *ab = ab_pci->ab;
+ int idx;
+
+ for (idx = 0; idx < msi_config.total_users; idx++) {
+ if (strcmp(user_name, msi_config.users[idx].name) == 0) {
+ *num_vectors = msi_config.users[idx].num_vectors;
+ *user_base_data = msi_config.users[idx].base_vector
+ + ab_pci->msi_ep_base_data;
+ *base_vector = msi_config.users[idx].base_vector;
+
+ ath11k_dbg(ab, ATH11K_DBG_PCI, "Assign MSI to user: %s, num_vectors: %d, user_base_data: %u, base_vector: %u\n",
+ user_name, *num_vectors, *user_base_data,
+ *base_vector);
+
+ return 0;
+ }
+ }
+
+ ath11k_err(ab, "Failed to find MSI assignment for %s!\n", user_name);
+
+ return -EINVAL;
+}
+
static int ath11k_pci_enable_msi(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
pci_disable_device(pci_dev);
}
+static int ath11k_pci_power_up(struct ath11k_base *ab)
+{
+ struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
+ int ret;
+
+ ret = ath11k_mhi_start(ab_pci);
+ if (ret) {
+ ath11k_err(ab, "failed to start mhi: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ath11k_pci_power_down(struct ath11k_base *ab)
+{
+ struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
+
+ ath11k_mhi_stop(ab_pci);
+}
+
+static __maybe_unused const struct ath11k_hif_ops ath11k_pci_hif_ops = {
+ .power_down = ath11k_pci_power_down,
+ .power_up = ath11k_pci_power_up,
+};
+
static int ath11k_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_dev)
{
if (ret)
goto err_pci_disable_msi;
+ ret = ath11k_mhi_register(ab_pci);
+ if (ret) {
+ ath11k_err(ab, "failed to register mhi: %d\n", ret);
+ goto err_pci_disable_msi;
+ }
+
return 0;
err_pci_disable_msi:
struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
set_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags);
+ ath11k_mhi_unregister(ab_pci);
ath11k_pci_disable_msi(ab_pci);
ath11k_pci_free_region(ab_pci);
ath11k_core_free(ab);
}
+static void ath11k_pci_shutdown(struct pci_dev *pdev)
+{
+ struct ath11k_base *ab = pci_get_drvdata(pdev);
+
+ ath11k_pci_power_down(ab);
+}
+
static struct pci_driver ath11k_pci_driver = {
.name = "ath11k_pci",
.id_table = ath11k_pci_id_table,
.probe = ath11k_pci_probe,
.remove = ath11k_pci_remove,
+ .shutdown = ath11k_pci_shutdown,
};
static int ath11k_pci_init(void)
projects / linux-2.6-block.git / commitdiff