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-rw-r--r--drivers/scsi/ufs/ufs.h36
-rw-r--r--drivers/scsi/ufs/ufshcd.c722
-rw-r--r--drivers/scsi/ufs/ufshcd.h22
-rw-r--r--drivers/scsi/ufs/ufshci.h32
4 files changed, 545 insertions, 267 deletions
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 721050090520..f42d1cee652a 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -196,9 +196,9 @@ enum {
* @dword_2: UPIU header DW-2
*/
struct utp_upiu_header {
- u32 dword_0;
- u32 dword_1;
- u32 dword_2;
+ __be32 dword_0;
+ __be32 dword_1;
+ __be32 dword_2;
};
/**
@@ -207,7 +207,7 @@ struct utp_upiu_header {
* @cdb: Command Descriptor Block CDB DW-4 to DW-7
*/
struct utp_upiu_cmd {
- u32 exp_data_transfer_len;
+ __be32 exp_data_transfer_len;
u8 cdb[MAX_CDB_SIZE];
};
@@ -228,10 +228,10 @@ struct utp_upiu_query {
u8 idn;
u8 index;
u8 selector;
- u16 reserved_osf;
- u16 length;
- u32 value;
- u32 reserved[2];
+ __be16 reserved_osf;
+ __be16 length;
+ __be32 value;
+ __be32 reserved[2];
};
/**
@@ -256,9 +256,9 @@ struct utp_upiu_req {
* @sense_data: Sense data field DW-8 to DW-12
*/
struct utp_cmd_rsp {
- u32 residual_transfer_count;
- u32 reserved[4];
- u16 sense_data_len;
+ __be32 residual_transfer_count;
+ __be32 reserved[4];
+ __be16 sense_data_len;
u8 sense_data[18];
};
@@ -286,10 +286,10 @@ struct utp_upiu_rsp {
*/
struct utp_upiu_task_req {
struct utp_upiu_header header;
- u32 input_param1;
- u32 input_param2;
- u32 input_param3;
- u32 reserved[2];
+ __be32 input_param1;
+ __be32 input_param2;
+ __be32 input_param3;
+ __be32 reserved[2];
};
/**
@@ -301,9 +301,9 @@ struct utp_upiu_task_req {
*/
struct utp_upiu_task_rsp {
struct utp_upiu_header header;
- u32 output_param1;
- u32 output_param2;
- u32 reserved[3];
+ __be32 output_param1;
+ __be32 output_param2;
+ __be32 reserved[3];
};
/**
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 04884d663e4e..0c2877251251 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -55,6 +55,9 @@
/* Query request timeout */
#define QUERY_REQ_TIMEOUT 30 /* msec */
+/* Task management command timeout */
+#define TM_CMD_TIMEOUT 100 /* msecs */
+
/* Expose the flag value from utp_upiu_query.value */
#define MASK_QUERY_UPIU_FLAG_LOC 0xFF
@@ -71,9 +74,22 @@ enum {
/* UFSHCD states */
enum {
- UFSHCD_STATE_OPERATIONAL,
UFSHCD_STATE_RESET,
UFSHCD_STATE_ERROR,
+ UFSHCD_STATE_OPERATIONAL,
+};
+
+/* UFSHCD error handling flags */
+enum {
+ UFSHCD_EH_IN_PROGRESS = (1 << 0),
+};
+
+/* UFSHCD UIC layer error flags */
+enum {
+ UFSHCD_UIC_DL_PA_INIT_ERROR = (1 << 0), /* Data link layer error */
+ UFSHCD_UIC_NL_ERROR = (1 << 1), /* Network layer error */
+ UFSHCD_UIC_TL_ERROR = (1 << 2), /* Transport Layer error */
+ UFSHCD_UIC_DME_ERROR = (1 << 3), /* DME error */
};
/* Interrupt configuration options */
@@ -83,6 +99,18 @@ enum {
UFSHCD_INT_CLEAR,
};
+#define ufshcd_set_eh_in_progress(h) \
+ (h->eh_flags |= UFSHCD_EH_IN_PROGRESS)
+#define ufshcd_eh_in_progress(h) \
+ (h->eh_flags & UFSHCD_EH_IN_PROGRESS)
+#define ufshcd_clear_eh_in_progress(h) \
+ (h->eh_flags &= ~UFSHCD_EH_IN_PROGRESS)
+
+static void ufshcd_tmc_handler(struct ufs_hba *hba);
+static void ufshcd_async_scan(void *data, async_cookie_t cookie);
+static int ufshcd_reset_and_restore(struct ufs_hba *hba);
+static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag);
+
/*
* ufshcd_wait_for_register - wait for register value to change
* @hba - per-adapter interface
@@ -163,7 +191,7 @@ static inline int ufshcd_is_device_present(u32 reg_hcs)
*/
static inline int ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp)
{
- return lrbp->utr_descriptor_ptr->header.dword_2 & MASK_OCS;
+ return le32_to_cpu(lrbp->utr_descriptor_ptr->header.dword_2) & MASK_OCS;
}
/**
@@ -176,19 +204,41 @@ static inline int ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp)
static inline int
ufshcd_get_tmr_ocs(struct utp_task_req_desc *task_req_descp)
{
- return task_req_descp->header.dword_2 & MASK_OCS;
+ return le32_to_cpu(task_req_descp->header.dword_2) & MASK_OCS;
}
/**
* ufshcd_get_tm_free_slot - get a free slot for task management request
* @hba: per adapter instance
+ * @free_slot: pointer to variable with available slot value
*
- * Returns maximum number of task management request slots in case of
- * task management queue full or returns the free slot number
+ * Get a free tag and lock it until ufshcd_put_tm_slot() is called.
+ * Returns 0 if free slot is not available, else return 1 with tag value
+ * in @free_slot.
*/
-static inline int ufshcd_get_tm_free_slot(struct ufs_hba *hba)
+static bool ufshcd_get_tm_free_slot(struct ufs_hba *hba, int *free_slot)
{
- return find_first_zero_bit(&hba->outstanding_tasks, hba->nutmrs);
+ int tag;
+ bool ret = false;
+
+ if (!free_slot)
+ goto out;
+
+ do {
+ tag = find_first_zero_bit(&hba->tm_slots_in_use, hba->nutmrs);
+ if (tag >= hba->nutmrs)
+ goto out;
+ } while (test_and_set_bit_lock(tag, &hba->tm_slots_in_use));
+
+ *free_slot = tag;
+ ret = true;
+out:
+ return ret;
+}
+
+static inline void ufshcd_put_tm_slot(struct ufs_hba *hba, int slot)
+{
+ clear_bit_unlock(slot, &hba->tm_slots_in_use);
}
/**
@@ -390,26 +440,6 @@ static inline void ufshcd_copy_sense_data(struct ufshcd_lrb *lrbp)
}
/**
- * ufshcd_query_to_cpu() - formats the buffer to native cpu endian
- * @response: upiu query response to convert
- */
-static inline void ufshcd_query_to_cpu(struct utp_upiu_query *response)
-{
- response->length = be16_to_cpu(response->length);
- response->value = be32_to_cpu(response->value);
-}
-
-/**
- * ufshcd_query_to_be() - formats the buffer to big endian
- * @request: upiu query request to convert
- */
-static inline void ufshcd_query_to_be(struct utp_upiu_query *request)
-{
- request->length = cpu_to_be16(request->length);
- request->value = cpu_to_be32(request->value);
-}
-
-/**
* ufshcd_copy_query_response() - Copy the Query Response and the data
* descriptor
* @hba: per adapter instance
@@ -425,7 +455,6 @@ void ufshcd_copy_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
UPIU_RSP_CODE_OFFSET;
memcpy(&query_res->upiu_res, &lrbp->ucd_rsp_ptr->qr, QUERY_OSF_SIZE);
- ufshcd_query_to_cpu(&query_res->upiu_res);
/* Get the descriptor */
@@ -749,7 +778,7 @@ static void ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba,
{
struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr;
struct ufs_query *query = &hba->dev_cmd.query;
- u16 len = query->request.upiu_req.length;
+ u16 len = be16_to_cpu(query->request.upiu_req.length);
u8 *descp = (u8 *)lrbp->ucd_req_ptr + GENERAL_UPIU_REQUEST_SIZE;
/* Query request header */
@@ -766,7 +795,6 @@ static void ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba,
/* Copy the Query Request buffer as is */
memcpy(&ucd_req_ptr->qr, &query->request.upiu_req,
QUERY_OSF_SIZE);
- ufshcd_query_to_be(&ucd_req_ptr->qr);
/* Copy the Descriptor */
if ((len > 0) && (query->request.upiu_req.opcode ==
@@ -853,10 +881,25 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
tag = cmd->request->tag;
- if (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL) {
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ switch (hba->ufshcd_state) {
+ case UFSHCD_STATE_OPERATIONAL:
+ break;
+ case UFSHCD_STATE_RESET:
err = SCSI_MLQUEUE_HOST_BUSY;
- goto out;
+ goto out_unlock;
+ case UFSHCD_STATE_ERROR:
+ set_host_byte(cmd, DID_ERROR);
+ cmd->scsi_done(cmd);
+ goto out_unlock;
+ default:
+ dev_WARN_ONCE(hba->dev, 1, "%s: invalid state %d\n",
+ __func__, hba->ufshcd_state);
+ set_host_byte(cmd, DID_BAD_TARGET);
+ cmd->scsi_done(cmd);
+ goto out_unlock;
}
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
/* acquire the tag to make sure device cmds don't use it */
if (test_and_set_bit_lock(tag, &hba->lrb_in_use)) {
@@ -893,6 +936,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
/* issue command to the controller */
spin_lock_irqsave(hba->host->host_lock, flags);
ufshcd_send_command(hba, tag);
+out_unlock:
spin_unlock_irqrestore(hba->host->host_lock, flags);
out:
return err;
@@ -1151,7 +1195,7 @@ static int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
}
if (flag_res)
- *flag_res = (response->upiu_res.value &
+ *flag_res = (be32_to_cpu(response->upiu_res.value) &
MASK_QUERY_UPIU_FLAG_LOC) & 0x1;
out_unlock:
@@ -1170,7 +1214,7 @@ out_unlock:
*
* Returns 0 for success, non-zero in case of failure
*/
-int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
+static int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
enum attr_idn idn, u8 index, u8 selector, u32 *attr_val)
{
struct ufs_query_req *request;
@@ -1195,7 +1239,7 @@ int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
switch (opcode) {
case UPIU_QUERY_OPCODE_WRITE_ATTR:
request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST;
- request->upiu_req.value = *attr_val;
+ request->upiu_req.value = cpu_to_be32(*attr_val);
break;
case UPIU_QUERY_OPCODE_READ_ATTR:
request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST;
@@ -1222,7 +1266,7 @@ int ufshcd_query_attr(struct ufs_hba *hba, enum query_opcode opcode,
goto out_unlock;
}
- *attr_val = response->upiu_res.value;
+ *attr_val = be32_to_cpu(response->upiu_res.value);
out_unlock:
mutex_unlock(&hba->dev_cmd.lock);
@@ -1481,7 +1525,7 @@ EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr);
*
* Returns 0 on success, non-zero value on failure
*/
-int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode)
+static int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode)
{
struct uic_command uic_cmd = {0};
struct completion pwr_done;
@@ -1701,11 +1745,6 @@ static int ufshcd_make_hba_operational(struct ufs_hba *hba)
goto out;
}
- if (hba->ufshcd_state == UFSHCD_STATE_RESET)
- scsi_unblock_requests(hba->host);
-
- hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL;
-
out:
return err;
}
@@ -1831,66 +1870,6 @@ static int ufshcd_verify_dev_init(struct ufs_hba *hba)
}
/**
- * ufshcd_do_reset - reset the host controller
- * @hba: per adapter instance
- *
- * Returns SUCCESS/FAILED
- */
-static int ufshcd_do_reset(struct ufs_hba *hba)
-{
- struct ufshcd_lrb *lrbp;
- unsigned long flags;
- int tag;
-
- /* block commands from midlayer */
- scsi_block_requests(hba->host);
-
- spin_lock_irqsave(hba->host->host_lock, flags);
- hba->ufshcd_state = UFSHCD_STATE_RESET;
-
- /* send controller to reset state */
- ufshcd_hba_stop(hba);
- spin_unlock_irqrestore(hba->host->host_lock, flags);
-
- /* abort outstanding commands */
- for (tag = 0; tag < hba->nutrs; tag++) {
- if (test_bit(tag, &hba->outstanding_reqs)) {
- lrbp = &hba->lrb[tag];
- if (lrbp->cmd) {
- scsi_dma_unmap(lrbp->cmd);
- lrbp->cmd->result = DID_RESET << 16;
- lrbp->cmd->scsi_done(lrbp->cmd);
- lrbp->cmd = NULL;
- clear_bit_unlock(tag, &hba->lrb_in_use);
- }
- }
- }
-
- /* complete device management command */
- if (hba->dev_cmd.complete)
- complete(hba->dev_cmd.complete);
-
- /* clear outstanding request/task bit maps */
- hba->outstanding_reqs = 0;
- hba->outstanding_tasks = 0;
-
- /* Host controller enable */
- if (ufshcd_hba_enable(hba)) {
- dev_err(hba->dev,
- "Reset: Controller initialization failed\n");
- return FAILED;
- }
-
- if (ufshcd_link_startup(hba)) {
- dev_err(hba->dev,
- "Reset: Link start-up failed\n");
- return FAILED;
- }
-
- return SUCCESS;
-}
-
-/**
* ufshcd_slave_alloc - handle initial SCSI device configurations
* @sdev: pointer to SCSI device
*
@@ -1907,6 +1886,9 @@ static int ufshcd_slave_alloc(struct scsi_device *sdev)
sdev->use_10_for_ms = 1;
scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
+ /* allow SCSI layer to restart the device in case of errors */
+ sdev->allow_restart = 1;
+
/*
* Inform SCSI Midlayer that the LUN queue depth is same as the
* controller queue depth. If a LUN queue depth is less than the
@@ -1934,10 +1916,11 @@ static void ufshcd_slave_destroy(struct scsi_device *sdev)
* ufshcd_task_req_compl - handle task management request completion
* @hba: per adapter instance
* @index: index of the completed request
+ * @resp: task management service response
*
- * Returns SUCCESS/FAILED
+ * Returns non-zero value on error, zero on success
*/
-static int ufshcd_task_req_compl(struct ufs_hba *hba, u32 index)
+static int ufshcd_task_req_compl(struct ufs_hba *hba, u32 index, u8 *resp)
{
struct utp_task_req_desc *task_req_descp;
struct utp_upiu_task_rsp *task_rsp_upiup;
@@ -1958,19 +1941,15 @@ static int ufshcd_task_req_compl(struct ufs_hba *hba, u32 index)
task_req_descp[index].task_rsp_upiu;
task_result = be32_to_cpu(task_rsp_upiup->header.dword_1);
task_result = ((task_result & MASK_TASK_RESPONSE) >> 8);
-
- if (task_result != UPIU_TASK_MANAGEMENT_FUNC_COMPL &&
- task_result != UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED)
- task_result = FAILED;
- else
- task_result = SUCCESS;
+ if (resp)
+ *resp = (u8)task_result;
} else {
- task_result = FAILED;
- dev_err(hba->dev,
- "trc: Invalid ocs = %x\n", ocs_value);
+ dev_err(hba->dev, "%s: failed, ocs = 0x%x\n",
+ __func__, ocs_value);
}
spin_unlock_irqrestore(hba->host->host_lock, flags);
- return task_result;
+
+ return ocs_value;
}
/**
@@ -2105,6 +2084,9 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
case OCS_ABORTED:
result |= DID_ABORT << 16;
break;
+ case OCS_INVALID_COMMAND_STATUS:
+ result |= DID_REQUEUE << 16;
+ break;
case OCS_INVALID_CMD_TABLE_ATTR:
case OCS_INVALID_PRDT_ATTR:
case OCS_MISMATCH_DATA_BUF_SIZE:
@@ -2422,41 +2404,145 @@ out:
}
/**
- * ufshcd_fatal_err_handler - handle fatal errors
- * @hba: per adapter instance
+ * ufshcd_err_handler - handle UFS errors that require s/w attention
+ * @work: pointer to work structure
*/
-static void ufshcd_fatal_err_handler(struct work_struct *work)
+static void ufshcd_err_handler(struct work_struct *work)
{
struct ufs_hba *hba;
- hba = container_of(work, struct ufs_hba, feh_workq);
+ unsigned long flags;
+ u32 err_xfer = 0;
+ u32 err_tm = 0;
+ int err = 0;
+ int tag;
+
+ hba = container_of(work, struct ufs_hba, eh_work);
pm_runtime_get_sync(hba->dev);
- /* check if reset is already in progress */
- if (hba->ufshcd_state != UFSHCD_STATE_RESET)
- ufshcd_do_reset(hba);
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ if (hba->ufshcd_state == UFSHCD_STATE_RESET) {
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ goto out;
+ }
+
+ hba->ufshcd_state = UFSHCD_STATE_RESET;
+ ufshcd_set_eh_in_progress(hba);
+
+ /* Complete requests that have door-bell cleared by h/w */
+ ufshcd_transfer_req_compl(hba);
+ ufshcd_tmc_handler(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ /* Clear pending transfer requests */
+ for_each_set_bit(tag, &hba->outstanding_reqs, hba->nutrs)
+ if (ufshcd_clear_cmd(hba, tag))
+ err_xfer |= 1 << tag;
+
+ /* Clear pending task management requests */
+ for_each_set_bit(tag, &hba->outstanding_tasks, hba->nutmrs)
+ if (ufshcd_clear_tm_cmd(hba, tag))
+ err_tm |= 1 << tag;
+
+ /* Complete the requests that are cleared by s/w */
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ ufshcd_transfer_req_compl(hba);
+ ufshcd_tmc_handler(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ /* Fatal errors need reset */
+ if (err_xfer || err_tm || (hba->saved_err & INT_FATAL_ERRORS) ||
+ ((hba->saved_err & UIC_ERROR) &&
+ (hba->saved_uic_err & UFSHCD_UIC_DL_PA_INIT_ERROR))) {
+ err = ufshcd_reset_and_restore(hba);
+ if (err) {
+ dev_err(hba->dev, "%s: reset and restore failed\n",
+ __func__);
+ hba->ufshcd_state = UFSHCD_STATE_ERROR;
+ }
+ /*
+ * Inform scsi mid-layer that we did reset and allow to handle
+ * Unit Attention properly.
+ */
+ scsi_report_bus_reset(hba->host, 0);
+ hba->saved_err = 0;
+ hba->saved_uic_err = 0;
+ }
+ ufshcd_clear_eh_in_progress(hba);
+
+out:
+ scsi_unblock_requests(hba->host);
pm_runtime_put_sync(hba->dev);
}
/**
- * ufshcd_err_handler - Check for fatal errors
- * @work: pointer to a work queue structure
+ * ufshcd_update_uic_error - check and set fatal UIC error flags.
+ * @hba: per-adapter instance
*/
-static void ufshcd_err_handler(struct ufs_hba *hba)
+static void ufshcd_update_uic_error(struct ufs_hba *hba)
{
u32 reg;
+ /* PA_INIT_ERROR is fatal and needs UIC reset */
+ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DATA_LINK_LAYER);
+ if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_INIT)
+ hba->uic_error |= UFSHCD_UIC_DL_PA_INIT_ERROR;
+
+ /* UIC NL/TL/DME errors needs software retry */
+ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_NETWORK_LAYER);
+ if (reg)
+ hba->uic_error |= UFSHCD_UIC_NL_ERROR;
+
+ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_TRANSPORT_LAYER);
+ if (reg)
+ hba->uic_error |= UFSHCD_UIC_TL_ERROR;
+
+ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DME);
+ if (reg)
+ hba->uic_error |= UFSHCD_UIC_DME_ERROR;
+
+ dev_dbg(hba->dev, "%s: UIC error flags = 0x%08x\n",
+ __func__, hba->uic_error);
+}
+
+/**
+ * ufshcd_check_errors - Check for errors that need s/w attention
+ * @hba: per-adapter instance
+ */
+static void ufshcd_check_errors(struct ufs_hba *hba)
+{
+ bool queue_eh_work = false;
+
if (hba->errors & INT_FATAL_ERRORS)
- goto fatal_eh;
+ queue_eh_work = true;
if (hba->errors & UIC_ERROR) {
- reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DATA_LINK_LAYER);
- if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_INIT)
- goto fatal_eh;
+ hba->uic_error = 0;
+ ufshcd_update_uic_error(hba);
+ if (hba->uic_error)
+ queue_eh_work = true;
}
- return;
-fatal_eh:
- hba->ufshcd_state = UFSHCD_STATE_ERROR;
- schedule_work(&hba->feh_workq);
+
+ if (queue_eh_work) {
+ /* handle fatal errors only when link is functional */
+ if (hba->ufshcd_state == UFSHCD_STATE_OPERATIONAL) {
+ /* block commands from scsi mid-layer */
+ scsi_block_requests(hba->host);
+
+ /* transfer error masks to sticky bits */
+ hba->saved_err |= hba->errors;
+ hba->saved_uic_err |= hba->uic_error;
+
+ hba->ufshcd_state = UFSHCD_STATE_ERROR;
+ schedule_work(&hba->eh_work);
+ }
+ }
+ /*
+ * if (!queue_eh_work) -
+ * Other errors are either non-fatal where host recovers
+ * itself without s/w intervention or errors that will be
+ * handled by the SCSI core layer.
+ */
}
/**
@@ -2469,7 +2555,7 @@ static void ufshcd_tmc_handler(struct ufs_hba *hba)
tm_doorbell = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
hba->tm_condition = tm_doorbell ^ hba->outstanding_tasks;
- wake_up_interruptible(&hba->ufshcd_tm_wait_queue);
+ wake_up(&hba->tm_wq);
}
/**
@@ -2481,7 +2567,7 @@ static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status)
{
hba->errors = UFSHCD_ERROR_MASK & intr_status;
if (hba->errors)
- ufshcd_err_handler(hba);
+ ufshcd_check_errors(hba);
if (intr_status & UFSHCD_UIC_MASK)
ufshcd_uic_cmd_compl(hba, intr_status);
@@ -2519,38 +2605,58 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba)
return retval;
}
+static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag)
+{
+ int err = 0;
+ u32 mask = 1 << tag;
+ unsigned long flags;
+
+ if (!test_bit(tag, &hba->outstanding_tasks))
+ goto out;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ ufshcd_writel(hba, ~(1 << tag), REG_UTP_TASK_REQ_LIST_CLEAR);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ /* poll for max. 1 sec to clear door bell register by h/w */
+ err = ufshcd_wait_for_register(hba,
+ REG_UTP_TASK_REQ_DOOR_BELL,
+ mask, 0, 1000, 1000);
+out:
+ return err;
+}
+
/**
* ufshcd_issue_tm_cmd - issues task management commands to controller
* @hba: per adapter instance
- * @lrbp: pointer to local reference block
+ * @lun_id: LUN ID to which TM command is sent
+ * @task_id: task ID to which the TM command is applicable
+ * @tm_function: task management function opcode
+ * @tm_response: task management service response return value
*
- * Returns SUCCESS/FAILED
+ * Returns non-zero value on error, zero on success.
*/
-static int
-ufshcd_issue_tm_cmd(struct ufs_hba *hba,
- struct ufshcd_lrb *lrbp,
- u8 tm_function)
+static int ufshcd_issue_tm_cmd(struct ufs_hba *hba, int lun_id, int task_id,
+ u8 tm_function, u8 *tm_response)
{
struct utp_task_req_desc *task_req_descp;
struct utp_upiu_task_req *task_req_upiup;
struct Scsi_Host *host;
unsigned long flags;
- int free_slot = 0;
+ int free_slot;
int err;
+ int task_tag;
host = hba->host;
- spin_lock_irqsave(host->host_lock, flags);
-
- /* If task management queue is full */
- free_slot = ufshcd_get_tm_free_slot(hba);
- if (free_slot >= hba->nutmrs) {
- spin_unlock_irqrestore(host->host_lock, flags);
- dev_err(hba->dev, "Task management queue full\n");
- err = FAILED;
- goto out;
- }
+ /*
+ * Get free slot, sleep if slots are unavailable.
+ * Even though we use wait_event() which sleeps indefinitely,
+ * the maximum wait time is bounded by %TM_CMD_TIMEOUT.
+ */
+ wait_event(hba->tm_tag_wq, ufshcd_get_tm_free_slot(hba, &free_slot));
+ spin_lock_irqsave(host->host_lock, flags);
task_req_descp = hba->utmrdl_base_addr;
task_req_descp += free_slot;
@@ -2562,18 +2668,15 @@ ufshcd_issue_tm_cmd(struct ufs_hba *hba,
/* Configure task request UPIU */
task_req_upiup =
(struct utp_upiu_task_req *) task_req_descp->task_req_upiu;
+ task_tag = hba->nutrs + free_slot;
task_req_upiup->header.dword_0 =
UPIU_HEADER_DWORD(UPIU_TRANSACTION_TASK_REQ, 0,
- lrbp->lun, lrbp->task_tag);
+ lun_id, task_tag);
task_req_upiup->header.dword_1 =
UPIU_HEADER_DWORD(0, tm_function, 0, 0);
- task_req_upiup->input_param1 = lrbp->lun;
- task_req_upiup->input_param1 =
- cpu_to_be32(task_req_upiup->input_param1);
- task_req_upiup->input_param2 = lrbp->task_tag;
- task_req_upiup->input_param2 =
- cpu_to_be32(task_req_upiup->input_param2);
+ task_req_upiup->input_param1 = cpu_to_be32(lun_id);
+ task_req_upiup->input_param2 = cpu_to_be32(task_id);
/* send command to the controller */
__set_bit(free_slot, &hba->outstanding_tasks);
@@ -2582,91 +2685,88 @@ ufshcd_issue_tm_cmd(struct ufs_hba *hba,
spin_unlock_irqrestore(host->host_lock, flags);
/* wait until the task management command is completed */
- err =
- wait_event_interruptible_timeout(hba->ufshcd_tm_wait_queue,
- (test_bit(free_slot,
- &hba->tm_condition) != 0),
- 60 * HZ);
+ err = wait_event_timeout(hba->tm_wq,
+ test_bit(free_slot, &hba->tm_condition),
+ msecs_to_jiffies(TM_CMD_TIMEOUT));
if (!err) {
- dev_err(hba->dev,
- "Task management command timed-out\n");
- err = FAILED;
- goto out;
+ dev_err(hba->dev, "%s: task management cmd 0x%.2x timed-out\n",
+ __func__, tm_function);
+ if (ufshcd_clear_tm_cmd(hba, free_slot))
+ dev_WARN(hba->dev, "%s: unable clear tm cmd (slot %d) after timeout\n",
+ __func__, free_slot);
+ err = -ETIMEDOUT;
+ } else {
+ err = ufshcd_task_req_compl(hba, free_slot, tm_response);
}
+
clear_bit(free_slot, &hba->tm_condition);
- err = ufshcd_task_req_compl(hba, free_slot);
-out:
+ ufshcd_put_tm_slot(hba, free_slot);
+ wake_up(&hba->tm_tag_wq);
+
return err;
}
/**
- * ufshcd_device_reset - reset device and abort all the pending commands
+ * ufshcd_eh_device_reset_handler - device reset handler registered to
+ * scsi layer.
* @cmd: SCSI command pointer
*
* Returns SUCCESS/FAILED
*/
-static int ufshcd_device_reset(struct scsi_cmnd *cmd)
+static int ufshcd_eh_device_reset_handler(struct scsi_cmnd *cmd)
{
struct Scsi_Host *host;
struct ufs_hba *hba;
unsigned int tag;
u32 pos;
int err;
+ u8 resp = 0xF;
+ struct ufshcd_lrb *lrbp;
+ unsigned long flags;
host = cmd->device->host;
hba = shost_priv(host);
tag = cmd->request->tag;
- err = ufshcd_issue_tm_cmd(hba, &hba->lrb[tag], UFS_LOGICAL_RESET);
- if (err == FAILED)
+ lrbp = &hba->lrb[tag];
+ err = ufshcd_issue_tm_cmd(hba, lrbp->lun, 0, UFS_LOGICAL_RESET, &resp);
+ if (err || resp != UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
+ if (!err)
+ err = resp;
goto out;
+ }
- for (pos = 0; pos < hba->nutrs; pos++) {
- if (test_bit(pos, &hba->outstanding_reqs) &&
- (hba->lrb[tag].lun == hba->lrb[pos].lun)) {
-
- /* clear the respective UTRLCLR register bit */
- ufshcd_utrl_clear(hba, pos);
-
- clear_bit(pos, &hba->outstanding_reqs);
-
- if (hba->lrb[pos].cmd) {
- scsi_dma_unmap(hba->lrb[pos].cmd);
- hba->lrb[pos].cmd->result =
- DID_ABORT << 16;
- hba->lrb[pos].cmd->scsi_done(cmd);
- hba->lrb[pos].cmd = NULL;
- clear_bit_unlock(pos, &hba->lrb_in_use);
- wake_up(&hba->dev_cmd.tag_wq);
- }
+ /* clear the commands that were pending for corresponding LUN */
+ for_each_set_bit(pos, &hba->outstanding_reqs, hba->nutrs) {
+ if (hba->lrb[pos].lun == lrbp->lun) {
+ err = ufshcd_clear_cmd(hba, pos);
+ if (err)
+ break;
}
- } /* end of for */
+ }
+ spin_lock_irqsave(host->host_lock, flags);
+ ufshcd_transfer_req_compl(hba);
+ spin_unlock_irqrestore(host->host_lock, flags);
out:
+ if (!err) {
+ err = SUCCESS;
+ } else {
+ dev_err(hba->dev, "%s: failed with err %d\n", __func__, err);
+ err = FAILED;
+ }
return err;
}
/**
- * ufshcd_host_reset - Main reset function registered with scsi layer
- * @cmd: SCSI command pointer
- *
- * Returns SUCCESS/FAILED
- */
-static int ufshcd_host_reset(struct scsi_cmnd *cmd)
-{
- struct ufs_hba *hba;
-
- hba = shost_priv(cmd->device->host);
-
- if (hba->ufshcd_state == UFSHCD_STATE_RESET)
- return SUCCESS;
-
- return ufshcd_do_reset(hba);
-}
-
-/**
* ufshcd_abort - abort a specific command
* @cmd: SCSI command pointer
*
+ * Abort the pending command in device by sending UFS_ABORT_TASK task management
+ * command, and in host controller by clearing the door-bell register. There can
+ * be race between controller sending the command to the device while abort is
+ * issued. To avoid that, first issue UFS_QUERY_TASK to check if the command is
+ * really issued and then try to abort it.
+ *
* Returns SUCCESS/FAILED
*/
static int ufshcd_abort(struct scsi_cmnd *cmd)
@@ -2675,33 +2775,68 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
struct ufs_hba *hba;
unsigned long flags;
unsigned int tag;
- int err;
+ int err = 0;
+ int poll_cnt;
+ u8 resp = 0xF;
+ struct ufshcd_lrb *lrbp;
host = cmd->device->host;
hba = shost_priv(host);
tag = cmd->request->tag;
- spin_lock_irqsave(host->host_lock, flags);
+ /* If command is already aborted/completed, return SUCCESS */
+ if (!(test_bit(tag, &hba->outstanding_reqs)))
+ goto out;
- /* check if command is still pending */
- if (!(test_bit(tag, &hba->outstanding_reqs))) {
- err = FAILED;
- spin_unlock_irqrestore(host->host_lock, flags);
+ lrbp = &hba->lrb[tag];
+ for (poll_cnt = 100; poll_cnt; poll_cnt--) {
+ err = ufshcd_issue_tm_cmd(hba, lrbp->lun, lrbp->task_tag,
+ UFS_QUERY_TASK, &resp);
+ if (!err && resp == UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED) {
+ /* cmd pending in the device */
+ break;
+ } else if (!err && resp == UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
+ u32 reg;
+
+ /*
+ * cmd not pending in the device, check if it is
+ * in transition.
+ */
+ reg = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
+ if (reg & (1 << tag)) {
+ /* sleep for max. 200us to stabilize */
+ usleep_range(100, 200);
+ continue;
+ }
+ /* command completed already */
+ goto out;
+ } else {
+ if (!err)
+ err = resp; /* service response error */
+ goto out;
+ }
+ }
+
+ if (!poll_cnt) {
+ err = -EBUSY;
goto out;
}
- spin_unlock_irqrestore(host->host_lock, flags);
- err = ufshcd_issue_tm_cmd(hba, &hba->lrb[tag], UFS_ABORT_TASK);
- if (err == FAILED)
+ err = ufshcd_issue_tm_cmd(hba, lrbp->lun, lrbp->task_tag,
+ UFS_ABORT_TASK, &resp);
+ if (err || resp != UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
+ if (!err)
+ err = resp; /* service response error */
+ goto out;
+ }
+
+ err = ufshcd_clear_cmd(hba, tag);
+ if (err)
goto out;
scsi_dma_unmap(cmd);
spin_lock_irqsave(host->host_lock, flags);
-
- /* clear the respective UTRLCLR register bit */
- ufshcd_utrl_clear(hba, tag);
-
__clear_bit(tag, &hba->outstanding_reqs);
hba->lrb[tag].cmd = NULL;
spin_unlock_irqrestore(host->host_lock, flags);
@@ -2709,6 +2844,129 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
clear_bit_unlock(tag, &hba->lrb_in_use);
wake_up(&hba->dev_cmd.tag_wq);
out:
+ if (!err) {
+ err = SUCCESS;
+ } else {
+ dev_err(hba->dev, "%s: failed with err %d\n", __func__, err);
+ err = FAILED;
+ }
+
+ return err;
+}
+
+/**
+ * ufshcd_host_reset_and_restore - reset and restore host controller
+ * @hba: per-adapter instance
+ *
+ * Note that host controller reset may issue DME_RESET to
+ * local and remote (device) Uni-Pro stack and the attributes
+ * are reset to default state.
+ *
+ * Returns zero on success, non-zero on failure
+ */
+static int ufshcd_host_reset_and_restore(struct ufs_hba *hba)
+{
+ int err;
+ async_cookie_t cookie;
+ unsigned long flags;
+
+ /* Reset the host controller */
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ ufshcd_hba_stop(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ err = ufshcd_hba_enable(hba);
+ if (err)
+ goto out;
+
+ /* Establish the link again and restore the device */
+ cookie = async_schedule(ufshcd_async_scan, hba);
+ /* wait for async scan to be completed */
+ async_synchronize_cookie(++cookie);
+ if (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)
+ err = -EIO;
+out:
+ if (err)
+ dev_err(hba->dev, "%s: Host init failed %d\n", __func__, err);
+
+ return err;
+}
+
+/**
+ * ufshcd_reset_and_restore - reset and re-initialize host/device
+ * @hba: per-adapter instance
+ *
+ * Reset and recover device, host and re-establish link. This
+ * is helpful to recover the communication in fatal error conditions.
+ *
+ * Returns zero on success, non-zero on failure
+ */
+static int ufshcd_reset_and_restore(struct ufs_hba *hba)
+{
+ int err = 0;
+ unsigned long flags;
+
+ err = ufshcd_host_reset_and_restore(hba);
+
+ /*
+ * After reset the door-bell might be cleared, complete
+ * outstanding requests in s/w here.
+ */
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ ufshcd_transfer_req_compl(hba);
+ ufshcd_tmc_handler(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ return err;
+}
+
+/**
+ * ufshcd_eh_host_reset_handler - host reset handler registered to scsi layer
+ * @cmd - SCSI command pointer
+ *
+ * Returns SUCCESS/FAILED
+ */
+static int ufshcd_eh_host_reset_handler(struct scsi_cmnd *cmd)
+{
+ int err;
+ unsigned long flags;
+ struct ufs_hba *hba;
+
+ hba = shost_priv(cmd->device->host);
+
+ /*
+ * Check if there is any race with fatal error handling.
+ * If so, wait for it to complete. Even though fatal error
+ * handling does reset and restore in some cases, don't assume
+ * anything out of it. We are just avoiding race here.
+ */
+ do {
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ if (!(work_pending(&hba->eh_work) ||
+ hba->ufshcd_state == UFSHCD_STATE_RESET))
+ break;
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ dev_dbg(hba->dev, "%s: reset in progress\n", __func__);
+ flush_work(&hba->eh_work);
+ } while (1);
+
+ hba->ufshcd_state = UFSHCD_STATE_RESET;
+ ufshcd_set_eh_in_progress(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ err = ufshcd_reset_and_restore(hba);
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ if (!err) {
+ err = SUCCESS;
+ hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL;
+ } else {
+ err = FAILED;
+ hba->ufshcd_state = UFSHCD_STATE_ERROR;
+ }
+ ufshcd_clear_eh_in_progress(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
return err;
}
@@ -2737,8 +2995,13 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie)
goto out;
ufshcd_force_reset_auto_bkops(hba);
- scsi_scan_host(hba->host);
- pm_runtime_put_sync(hba->dev);
+ hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL;
+
+ /* If we are in error handling context no need to scan the host */
+ if (!ufshcd_eh_in_progress(hba)) {
+ scsi_scan_host(hba->host);
+ pm_runtime_put_sync(hba->dev);
+ }
out:
return;
}
@@ -2751,8 +3014,8 @@ static struct scsi_host_template ufshcd_driver_template = {
.slave_alloc = ufshcd_slave_alloc,
.slave_destroy = ufshcd_slave_destroy,
.eh_abort_handler = ufshcd_abort,
- .eh_device_reset_handler = ufshcd_device_reset,
- .eh_host_reset_handler = ufshcd_host_reset,
+ .eh_device_reset_handler = ufshcd_eh_device_reset_handler,
+ .eh_host_reset_handler = ufshcd_eh_host_reset_handler,
.this_id = -1,
.sg_tablesize = SG_ALL,
.cmd_per_lun = UFSHCD_CMD_PER_LUN,
@@ -2916,10 +3179,11 @@ int ufshcd_init(struct device *dev, struct ufs_hba **hba_handle,
host->max_cmd_len = MAX_CDB_SIZE;
/* Initailize wait queue for task management */
- init_waitqueue_head(&hba->ufshcd_tm_wait_queue);
+ init_waitqueue_head(&hba->tm_wq);
+ init_waitqueue_head(&hba->tm_tag_wq);
/* Initialize work queues */
- INIT_WORK(&hba->feh_workq, ufshcd_fatal_err_handler);
+ INIT_WORK(&hba->eh_work, ufshcd_err_handler);
INIT_WORK(&hba->eeh_work, ufshcd_exception_event_handler);
/* Initialize UIC command mutex */
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 577679a2d189..acf318e338ed 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -174,15 +174,21 @@ struct ufs_dev_cmd {
* @irq: Irq number of the controller
* @active_uic_cmd: handle of active UIC command
* @uic_cmd_mutex: mutex for uic command
- * @ufshcd_tm_wait_queue: wait queue for task management
+ * @tm_wq: wait queue for task management
+ * @tm_tag_wq: wait queue for free task management slots
+ * @tm_slots_in_use: bit map of task management request slots in use
* @pwr_done: completion for power mode change
* @tm_condition: condition variable for task management
* @ufshcd_state: UFSHCD states
+ * @eh_flags: Error handling flags
* @intr_mask: Interrupt Mask Bits
* @ee_ctrl_mask: Exception event control mask
- * @feh_workq: Work queue for fatal controller error handling
+ * @eh_work: Worker to handle UFS errors that require s/w attention
* @eeh_work: Worker to handle exception events
* @errors: HBA errors
+ * @uic_error: UFS interconnect layer error status
+ * @saved_err: sticky error mask
+ * @saved_uic_err: sticky UIC error mask
* @dev_cmd: ufs device management command information
* @auto_bkops_enabled: to track whether bkops is enabled in device
*/
@@ -217,21 +223,27 @@ struct ufs_hba {
struct uic_command *active_uic_cmd;
struct mutex uic_cmd_mutex;
- wait_queue_head_t ufshcd_tm_wait_queue;
+ wait_queue_head_t tm_wq;
+ wait_queue_head_t tm_tag_wq;
unsigned long tm_condition;
+ unsigned long tm_slots_in_use;
struct completion *pwr_done;
u32 ufshcd_state;
+ u32 eh_flags;
u32 intr_mask;
u16 ee_ctrl_mask;
/* Work Queues */
- struct work_struct feh_workq;
+ struct work_struct eh_work;
struct work_struct eeh_work;
/* HBA Errors */
u32 errors;
+ u32 uic_error;
+ u32 saved_err;
+ u32 saved_uic_err;
/* Device management request data */
struct ufs_dev_cmd dev_cmd;
@@ -263,6 +275,8 @@ static inline void check_upiu_size(void)
GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
}
+extern int ufshcd_suspend(struct ufs_hba *hba, pm_message_t state);
+extern int ufshcd_resume(struct ufs_hba *hba);
extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
extern int ufshcd_runtime_resume(struct ufs_hba *hba);
extern int ufshcd_runtime_idle(struct ufs_hba *hba);
diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h
index 0475c6619a68..9abc7e32b43d 100644
--- a/drivers/scsi/ufs/ufshci.h
+++ b/drivers/scsi/ufs/ufshci.h
@@ -304,10 +304,10 @@ enum {
* @size: size of physical segment DW-3
*/
struct ufshcd_sg_entry {
- u32 base_addr;
- u32 upper_addr;
- u32 reserved;
- u32 size;
+ __le32 base_addr;
+ __le32 upper_addr;
+ __le32 reserved;
+ __le32 size;
};
/**
@@ -330,10 +330,10 @@ struct utp_transfer_cmd_desc {
* @dword3: Descriptor Header DW3
*/
struct request_desc_header {
- u32 dword_0;
- u32 dword_1;
- u32 dword_2;
- u32 dword_3;
+ __le32 dword_0;
+ __le32 dword_1;
+ __le32 dword_2;
+ __le32 dword_3;
};
/**
@@ -352,16 +352,16 @@ struct utp_transfer_req_desc {
struct request_desc_header header;
/* DW 4-5*/
- u32 command_desc_base_addr_lo;
- u32 command_desc_base_addr_hi;
+ __le32 command_desc_base_addr_lo;
+ __le32 command_desc_base_addr_hi;
/* DW 6 */
- u16 response_upiu_length;
- u16 response_upiu_offset;
+ __le16 response_upiu_length;
+ __le16 response_upiu_offset;
/* DW 7 */
- u16 prd_table_length;
- u16 prd_table_offset;
+ __le16 prd_table_length;
+ __le16 prd_table_offset;
};
/**
@@ -376,10 +376,10 @@ struct utp_task_req_desc {
struct request_desc_header header;
/* DW 4-11 */
- u32 task_req_upiu[TASK_REQ_UPIU_SIZE_DWORDS];
+ __le32 task_req_upiu[TASK_REQ_UPIU_SIZE_DWORDS];
/* DW 12-19 */
- u32 task_rsp_upiu[TASK_RSP_UPIU_SIZE_DWORDS];
+ __le32 task_rsp_upiu[TASK_RSP_UPIU_SIZE_DWORDS];
};
#endif /* End of Header */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-23 00:59:33 +0300