/* UIC command timeout, unit: ms */
#define UIC_CMD_TIMEOUT 500
+/* NOP OUT retries waiting for NOP IN response */
+#define NOP_OUT_RETRIES 10
+/* Timeout after 30 msecs if NOP OUT hangs without response */
+#define NOP_OUT_TIMEOUT 30 /* msecs */
+
enum {
UFSHCD_MAX_CHANNEL = 0,
UFSHCD_MAX_ID = 1,
INT_AGGR_CONFIG,
};
+/*
+ * ufshcd_wait_for_register - wait for register value to change
+ * @hba - per-adapter interface
+ * @reg - mmio register offset
+ * @mask - mask to apply to read register value
+ * @val - wait condition
+ * @interval_us - polling interval in microsecs
+ * @timeout_ms - timeout in millisecs
+ *
+ * Returns -ETIMEDOUT on error, zero on success
+ */
+static int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
+ u32 val, unsigned long interval_us, unsigned long timeout_ms)
+{
+ int err = 0;
+ unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
+
+ /* ignore bits that we don't intend to wait on */
+ val = val & mask;
+
+ while ((ufshcd_readl(hba, reg) & mask) != val) {
+ /* wakeup within 50us of expiry */
+ usleep_range(interval_us, interval_us + 50);
+
+ if (time_after(jiffies, timeout)) {
+ if ((ufshcd_readl(hba, reg) & mask) != val)
+ err = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ return err;
+}
+
/**
* ufshcd_get_intr_mask - Get the interrupt bit mask
* @hba - Pointer to adapter instance
}
/**
- * ufshcd_is_valid_req_rsp - checks if controller TR response is valid
+ * ufshcd_get_req_rsp - returns the TR response transaction type
* @ucd_rsp_ptr: pointer to response UPIU
- *
- * This function checks the response UPIU for valid transaction type in
- * response field
- * Returns 0 on success, non-zero on failure
*/
static inline int
-ufshcd_is_valid_req_rsp(struct utp_upiu_rsp *ucd_rsp_ptr)
+ufshcd_get_req_rsp(struct utp_upiu_rsp *ucd_rsp_ptr)
{
- return ((be32_to_cpu(ucd_rsp_ptr->header.dword_0) >> 24) ==
- UPIU_TRANSACTION_RESPONSE) ? 0 : DID_ERROR << 16;
+ return be32_to_cpu(ucd_rsp_ptr->header.dword_0) >> 24;
}
/**
{
int len;
if (lrbp->sense_buffer) {
- len = be16_to_cpu(lrbp->ucd_rsp_ptr->sense_data_len);
+ len = be16_to_cpu(lrbp->ucd_rsp_ptr->sr.sense_data_len);
memcpy(lrbp->sense_buffer,
- lrbp->ucd_rsp_ptr->sense_data,
+ lrbp->ucd_rsp_ptr->sr.sense_data,
min_t(int, len, SCSI_SENSE_BUFFERSIZE));
}
}
ufshcd_writel(hba, set, REG_INTERRUPT_ENABLE);
}
+/**
+ * ufshcd_prepare_req_desc_hdr() - Fills the requests header
+ * descriptor according to request
+ * @lrbp: pointer to local reference block
+ * @upiu_flags: flags required in the header
+ * @cmd_dir: requests data direction
+ */
+static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp,
+ u32 *upiu_flags, enum dma_data_direction cmd_dir)
+{
+ struct utp_transfer_req_desc *req_desc = lrbp->utr_descriptor_ptr;
+ u32 data_direction;
+ u32 dword_0;
+
+ if (cmd_dir == DMA_FROM_DEVICE) {
+ data_direction = UTP_DEVICE_TO_HOST;
+ *upiu_flags = UPIU_CMD_FLAGS_READ;
+ } else if (cmd_dir == DMA_TO_DEVICE) {
+ data_direction = UTP_HOST_TO_DEVICE;
+ *upiu_flags = UPIU_CMD_FLAGS_WRITE;
+ } else {
+ data_direction = UTP_NO_DATA_TRANSFER;
+ *upiu_flags = UPIU_CMD_FLAGS_NONE;
+ }
+
+ dword_0 = data_direction | (lrbp->command_type
+ << UPIU_COMMAND_TYPE_OFFSET);
+ if (lrbp->intr_cmd)
+ dword_0 |= UTP_REQ_DESC_INT_CMD;
+
+ /* Transfer request descriptor header fields */
+ req_desc->header.dword_0 = cpu_to_le32(dword_0);
+
+ /*
+ * assigning invalid value for command status. Controller
+ * updates OCS on command completion, with the command
+ * status
+ */
+ req_desc->header.dword_2 =
+ cpu_to_le32(OCS_INVALID_COMMAND_STATUS);
+}
+
+/**
+ * ufshcd_prepare_utp_scsi_cmd_upiu() - fills the utp_transfer_req_desc,
+ * for scsi commands
+ * @lrbp - local reference block pointer
+ * @upiu_flags - flags
+ */
+static
+void ufshcd_prepare_utp_scsi_cmd_upiu(struct ufshcd_lrb *lrbp, u32 upiu_flags)
+{
+ struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr;
+
+ /* command descriptor fields */
+ ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD(
+ UPIU_TRANSACTION_COMMAND, upiu_flags,
+ lrbp->lun, lrbp->task_tag);
+ ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD(
+ UPIU_COMMAND_SET_TYPE_SCSI, 0, 0, 0);
+
+ /* Total EHS length and Data segment length will be zero */
+ ucd_req_ptr->header.dword_2 = 0;
+
+ ucd_req_ptr->sc.exp_data_transfer_len =
+ cpu_to_be32(lrbp->cmd->sdb.length);
+
+ memcpy(ucd_req_ptr->sc.cdb, lrbp->cmd->cmnd,
+ (min_t(unsigned short, lrbp->cmd->cmd_len, MAX_CDB_SIZE)));
+}
+
+static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp)
+{
+ struct utp_upiu_req *ucd_req_ptr = lrbp->ucd_req_ptr;
+
+ memset(ucd_req_ptr, 0, sizeof(struct utp_upiu_req));
+
+ /* command descriptor fields */
+ ucd_req_ptr->header.dword_0 =
+ UPIU_HEADER_DWORD(
+ UPIU_TRANSACTION_NOP_OUT, 0, 0, lrbp->task_tag);
+}
+
/**
* ufshcd_compose_upiu - form UFS Protocol Information Unit(UPIU)
+ * @hba - per adapter instance
* @lrb - pointer to local reference block
*/
-static void ufshcd_compose_upiu(struct ufshcd_lrb *lrbp)
+static int ufshcd_compose_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
{
- struct utp_transfer_req_desc *req_desc;
- struct utp_upiu_cmd *ucd_cmd_ptr;
- u32 data_direction;
u32 upiu_flags;
-
- ucd_cmd_ptr = lrbp->ucd_cmd_ptr;
- req_desc = lrbp->utr_descriptor_ptr;
+ int ret = 0;
switch (lrbp->command_type) {
case UTP_CMD_TYPE_SCSI:
- if (lrbp->cmd->sc_data_direction == DMA_FROM_DEVICE) {
- data_direction = UTP_DEVICE_TO_HOST;
- upiu_flags = UPIU_CMD_FLAGS_READ;
- } else if (lrbp->cmd->sc_data_direction == DMA_TO_DEVICE) {
- data_direction = UTP_HOST_TO_DEVICE;
- upiu_flags = UPIU_CMD_FLAGS_WRITE;
+ if (likely(lrbp->cmd)) {
+ ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags,
+ lrbp->cmd->sc_data_direction);
+ ufshcd_prepare_utp_scsi_cmd_upiu(lrbp, upiu_flags);
} else {
- data_direction = UTP_NO_DATA_TRANSFER;
- upiu_flags = UPIU_CMD_FLAGS_NONE;
+ ret = -EINVAL;
}
-
- /* Transfer request descriptor header fields */
- req_desc->header.dword_0 =
- cpu_to_le32(data_direction | UTP_SCSI_COMMAND);
-
- /*
- * assigning invalid value for command status. Controller
- * updates OCS on command completion, with the command
- * status
- */
- req_desc->header.dword_2 =
- cpu_to_le32(OCS_INVALID_COMMAND_STATUS);
-
- /* command descriptor fields */
- ucd_cmd_ptr->header.dword_0 =
- cpu_to_be32(UPIU_HEADER_DWORD(UPIU_TRANSACTION_COMMAND,
- upiu_flags,
- lrbp->lun,
- lrbp->task_tag));
- ucd_cmd_ptr->header.dword_1 =
- cpu_to_be32(
- UPIU_HEADER_DWORD(UPIU_COMMAND_SET_TYPE_SCSI,
- 0,
- 0,
- 0));
-
- /* Total EHS length and Data segment length will be zero */
- ucd_cmd_ptr->header.dword_2 = 0;
-
- ucd_cmd_ptr->exp_data_transfer_len =
- cpu_to_be32(lrbp->cmd->sdb.length);
-
- memcpy(ucd_cmd_ptr->cdb,
- lrbp->cmd->cmnd,
- (min_t(unsigned short,
- lrbp->cmd->cmd_len,
- MAX_CDB_SIZE)));
break;
case UTP_CMD_TYPE_DEV_MANAGE:
- /* For query function implementation */
+ ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, DMA_NONE);
+ if (hba->dev_cmd.type == DEV_CMD_TYPE_NOP)
+ ufshcd_prepare_utp_nop_upiu(lrbp);
+ else
+ ret = -EINVAL;
break;
case UTP_CMD_TYPE_UFS:
/* For UFS native command implementation */
+ ret = -ENOTSUPP;
+ dev_err(hba->dev, "%s: UFS native command are not supported\n",
+ __func__);
+ break;
+ default:
+ ret = -ENOTSUPP;
+ dev_err(hba->dev, "%s: unknown command type: 0x%x\n",
+ __func__, lrbp->command_type);
break;
} /* end of switch */
+
+ return ret;
}
/**
goto out;
}
+ /* acquire the tag to make sure device cmds don't use it */
+ if (test_and_set_bit_lock(tag, &hba->lrb_in_use)) {
+ /*
+ * Dev manage command in progress, requeue the command.
+ * Requeuing the command helps in cases where the request *may*
+ * find different tag instead of waiting for dev manage command
+ * completion.
+ */
+ err = SCSI_MLQUEUE_HOST_BUSY;
+ goto out;
+ }
+
lrbp = &hba->lrb[tag];
+ WARN_ON(lrbp->cmd);
lrbp->cmd = cmd;
lrbp->sense_bufflen = SCSI_SENSE_BUFFERSIZE;
lrbp->sense_buffer = cmd->sense_buffer;
lrbp->task_tag = tag;
lrbp->lun = cmd->device->lun;
-
+ lrbp->intr_cmd = false;
lrbp->command_type = UTP_CMD_TYPE_SCSI;
/* form UPIU before issuing the command */
- ufshcd_compose_upiu(lrbp);
+ ufshcd_compose_upiu(hba, lrbp);
err = ufshcd_map_sg(lrbp);
- if (err)
+ if (err) {
+ lrbp->cmd = NULL;
+ clear_bit_unlock(tag, &hba->lrb_in_use);
goto out;
+ }
/* issue command to the controller */
spin_lock_irqsave(hba->host->host_lock, flags);
return err;
}
+static int ufshcd_compose_dev_cmd(struct ufs_hba *hba,
+ struct ufshcd_lrb *lrbp, enum dev_cmd_type cmd_type, int tag)
+{
+ lrbp->cmd = NULL;
+ lrbp->sense_bufflen = 0;
+ lrbp->sense_buffer = NULL;
+ lrbp->task_tag = tag;
+ lrbp->lun = 0; /* device management cmd is not specific to any LUN */
+ lrbp->command_type = UTP_CMD_TYPE_DEV_MANAGE;
+ lrbp->intr_cmd = true; /* No interrupt aggregation */
+ hba->dev_cmd.type = cmd_type;
+
+ return ufshcd_compose_upiu(hba, lrbp);
+}
+
+static int
+ufshcd_clear_cmd(struct ufs_hba *hba, int tag)
+{
+ int err = 0;
+ unsigned long flags;
+ u32 mask = 1 << tag;
+
+ /* clear outstanding transaction before retry */
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ ufshcd_utrl_clear(hba, tag);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ /*
+ * wait for for h/w to clear corresponding bit in door-bell.
+ * max. wait is 1 sec.
+ */
+ err = ufshcd_wait_for_register(hba,
+ REG_UTP_TRANSFER_REQ_DOOR_BELL,
+ mask, ~mask, 1000, 1000);
+
+ return err;
+}
+
+/**
+ * ufshcd_dev_cmd_completion() - handles device management command responses
+ * @hba: per adapter instance
+ * @lrbp: pointer to local reference block
+ */
+static int
+ufshcd_dev_cmd_completion(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+{
+ int resp;
+ int err = 0;
+
+ resp = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
+
+ switch (resp) {
+ case UPIU_TRANSACTION_NOP_IN:
+ if (hba->dev_cmd.type != DEV_CMD_TYPE_NOP) {
+ err = -EINVAL;
+ dev_err(hba->dev, "%s: unexpected response %x\n",
+ __func__, resp);
+ }
+ break;
+ case UPIU_TRANSACTION_REJECT_UPIU:
+ /* TODO: handle Reject UPIU Response */
+ err = -EPERM;
+ dev_err(hba->dev, "%s: Reject UPIU not fully implemented\n",
+ __func__);
+ break;
+ default:
+ err = -EINVAL;
+ dev_err(hba->dev, "%s: Invalid device management cmd response: %x\n",
+ __func__, resp);
+ break;
+ }
+
+ return err;
+}
+
+static int ufshcd_wait_for_dev_cmd(struct ufs_hba *hba,
+ struct ufshcd_lrb *lrbp, int max_timeout)
+{
+ int err = 0;
+ unsigned long time_left;
+ unsigned long flags;
+
+ time_left = wait_for_completion_timeout(hba->dev_cmd.complete,
+ msecs_to_jiffies(max_timeout));
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ hba->dev_cmd.complete = NULL;
+ if (likely(time_left)) {
+ err = ufshcd_get_tr_ocs(lrbp);
+ if (!err)
+ err = ufshcd_dev_cmd_completion(hba, lrbp);
+ }
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ if (!time_left) {
+ err = -ETIMEDOUT;
+ if (!ufshcd_clear_cmd(hba, lrbp->task_tag))
+ /* sucessfully cleared the command, retry if needed */
+ err = -EAGAIN;
+ }
+
+ return err;
+}
+
+/**
+ * ufshcd_get_dev_cmd_tag - Get device management command tag
+ * @hba: per-adapter instance
+ * @tag: pointer to variable with available slot value
+ *
+ * Get a free slot and lock it until device management command
+ * completes.
+ *
+ * Returns false if free slot is unavailable for locking, else
+ * return true with tag value in @tag.
+ */
+static bool ufshcd_get_dev_cmd_tag(struct ufs_hba *hba, int *tag_out)
+{
+ int tag;
+ bool ret = false;
+ unsigned long tmp;
+
+ if (!tag_out)
+ goto out;
+
+ do {
+ tmp = ~hba->lrb_in_use;
+ tag = find_last_bit(&tmp, hba->nutrs);
+ if (tag >= hba->nutrs)
+ goto out;
+ } while (test_and_set_bit_lock(tag, &hba->lrb_in_use));
+
+ *tag_out = tag;
+ ret = true;
+out:
+ return ret;
+}
+
+static inline void ufshcd_put_dev_cmd_tag(struct ufs_hba *hba, int tag)
+{
+ clear_bit_unlock(tag, &hba->lrb_in_use);
+}
+
+/**
+ * ufshcd_exec_dev_cmd - API for sending device management requests
+ * @hba - UFS hba
+ * @cmd_type - specifies the type (NOP, Query...)
+ * @timeout - time in seconds
+ *
+ * NOTE: There is only one available tag for device management commands. Thus
+ * synchronisation is the responsibilty of the user.
+ */
+static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
+ enum dev_cmd_type cmd_type, int timeout)
+{
+ struct ufshcd_lrb *lrbp;
+ int err;
+ int tag;
+ struct completion wait;
+ unsigned long flags;
+
+ /*
+ * Get free slot, sleep if slots are unavailable.
+ * Even though we use wait_event() which sleeps indefinitely,
+ * the maximum wait time is bounded by SCSI request timeout.
+ */
+ wait_event(hba->dev_cmd.tag_wq, ufshcd_get_dev_cmd_tag(hba, &tag));
+
+ init_completion(&wait);
+ lrbp = &hba->lrb[tag];
+ WARN_ON(lrbp->cmd);
+ err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag);
+ if (unlikely(err))
+ goto out_put_tag;
+
+ hba->dev_cmd.complete = &wait;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ ufshcd_send_command(hba, tag);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ err = ufshcd_wait_for_dev_cmd(hba, lrbp, timeout);
+
+out_put_tag:
+ ufshcd_put_dev_cmd_tag(hba, tag);
+ wake_up(&hba->dev_cmd.tag_wq);
+ return err;
+}
+
/**
* ufshcd_memory_alloc - allocate memory for host memory space data structures
* @hba: per adapter instance
cpu_to_le16(ALIGNED_UPIU_SIZE >> 2);
hba->lrb[i].utr_descriptor_ptr = (utrdlp + i);
- hba->lrb[i].ucd_cmd_ptr =
- (struct utp_upiu_cmd *)(cmd_descp + i);
+ hba->lrb[i].ucd_req_ptr =
+ (struct utp_upiu_req *)(cmd_descp + i);
hba->lrb[i].ucd_rsp_ptr =
(struct utp_upiu_rsp *)cmd_descp[i].response_upiu;
hba->lrb[i].ucd_prdt_ptr =
return ret;
}
+/**
+ * ufshcd_verify_dev_init() - Verify device initialization
+ * @hba: per-adapter instance
+ *
+ * Send NOP OUT UPIU and wait for NOP IN response to check whether the
+ * device Transport Protocol (UTP) layer is ready after a reset.
+ * If the UTP layer at the device side is not initialized, it may
+ * not respond with NOP IN UPIU within timeout of %NOP_OUT_TIMEOUT
+ * and we retry sending NOP OUT for %NOP_OUT_RETRIES iterations.
+ */
+static int ufshcd_verify_dev_init(struct ufs_hba *hba)
+{
+ int err = 0;
+ int retries;
+
+ mutex_lock(&hba->dev_cmd.lock);
+ for (retries = NOP_OUT_RETRIES; retries > 0; retries--) {
+ err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_NOP,
+ NOP_OUT_TIMEOUT);
+
+ if (!err || err == -ETIMEDOUT)
+ break;
+
+ dev_dbg(hba->dev, "%s: error %d retrying\n", __func__, err);
+ }
+ mutex_unlock(&hba->dev_cmd.lock);
+
+ if (err)
+ dev_err(hba->dev, "%s: NOP OUT failed %d\n", __func__, err);
+ return err;
+}
+
/**
* ufshcd_do_reset - reset the host controller
* @hba: per adapter instance
for (tag = 0; tag < hba->nutrs; tag++) {
if (test_bit(tag, &hba->outstanding_reqs)) {
lrbp = &hba->lrb[tag];
- scsi_dma_unmap(lrbp->cmd);
- lrbp->cmd->result = DID_RESET << 16;
- lrbp->cmd->scsi_done(lrbp->cmd);
- lrbp->cmd = NULL;
+ 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;
switch (ocs) {
case OCS_SUCCESS:
+ result = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
- /* check if the returned transfer response is valid */
- result = ufshcd_is_valid_req_rsp(lrbp->ucd_rsp_ptr);
- if (result) {
+ switch (result) {
+ case UPIU_TRANSACTION_RESPONSE:
+ /*
+ * get the response UPIU result to extract
+ * the SCSI command status
+ */
+ result = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr);
+
+ /*
+ * get the result based on SCSI status response
+ * to notify the SCSI midlayer of the command status
+ */
+ scsi_status = result & MASK_SCSI_STATUS;
+ result = ufshcd_scsi_cmd_status(lrbp, scsi_status);
+ break;
+ case UPIU_TRANSACTION_REJECT_UPIU:
+ /* TODO: handle Reject UPIU Response */
+ result = DID_ERROR << 16;
dev_err(hba->dev,
- "Invalid response = %x\n", result);
+ "Reject UPIU not fully implemented\n");
+ break;
+ default:
+ result = DID_ERROR << 16;
+ dev_err(hba->dev,
+ "Unexpected request response code = %x\n",
+ result);
break;
}
-
- /*
- * get the response UPIU result to extract
- * the SCSI command status
- */
- result = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr);
-
- /*
- * get the result based on SCSI status response
- * to notify the SCSI midlayer of the command status
- */
- scsi_status = result & MASK_SCSI_STATUS;
- result = ufshcd_scsi_cmd_status(lrbp, scsi_status);
break;
case OCS_ABORTED:
result |= DID_ABORT << 16;
*/
static void ufshcd_transfer_req_compl(struct ufs_hba *hba)
{
- struct ufshcd_lrb *lrb;
+ struct ufshcd_lrb *lrbp;
+ struct scsi_cmnd *cmd;
unsigned long completed_reqs;
u32 tr_doorbell;
int result;
int index;
+ bool int_aggr_reset = false;
- lrb = hba->lrb;
tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
completed_reqs = tr_doorbell ^ hba->outstanding_reqs;
for (index = 0; index < hba->nutrs; index++) {
if (test_bit(index, &completed_reqs)) {
+ lrbp = &hba->lrb[index];
+ cmd = lrbp->cmd;
+ /*
+ * Don't skip resetting interrupt aggregation counters
+ * if a regular command is present.
+ */
+ int_aggr_reset |= !lrbp->intr_cmd;
- result = ufshcd_transfer_rsp_status(hba, &lrb[index]);
-
- if (lrb[index].cmd) {
- scsi_dma_unmap(lrb[index].cmd);
- lrb[index].cmd->result = result;
- lrb[index].cmd->scsi_done(lrb[index].cmd);
-
+ if (cmd) {
+ result = ufshcd_transfer_rsp_status(hba, lrbp);
+ scsi_dma_unmap(cmd);
+ cmd->result = result;
/* Mark completed command as NULL in LRB */
- lrb[index].cmd = NULL;
+ lrbp->cmd = NULL;
+ clear_bit_unlock(index, &hba->lrb_in_use);
+ /* Do not touch lrbp after scsi done */
+ cmd->scsi_done(cmd);
+ } else if (lrbp->command_type ==
+ UTP_CMD_TYPE_DEV_MANAGE) {
+ if (hba->dev_cmd.complete)
+ complete(hba->dev_cmd.complete);
}
} /* end of if */
} /* end of for */
/* clear corresponding bits of completed commands */
hba->outstanding_reqs ^= completed_reqs;
+ /* we might have free'd some tags above */
+ wake_up(&hba->dev_cmd.tag_wq);
+
/* Reset interrupt aggregation counters */
- ufshcd_config_int_aggr(hba, INT_AGGR_RESET);
+ if (int_aggr_reset)
+ ufshcd_config_int_aggr(hba, INT_AGGR_RESET);
}
/**
task_req_upiup =
(struct utp_upiu_task_req *) task_req_descp->task_req_upiu;
task_req_upiup->header.dword_0 =
- cpu_to_be32(UPIU_HEADER_DWORD(UPIU_TRANSACTION_TASK_REQ, 0,
- lrbp->lun, lrbp->task_tag));
+ UPIU_HEADER_DWORD(UPIU_TRANSACTION_TASK_REQ, 0,
+ lrbp->lun, lrbp->task_tag);
task_req_upiup->header.dword_1 =
- cpu_to_be32(UPIU_HEADER_DWORD(0, tm_function, 0, 0));
+ UPIU_HEADER_DWORD(0, tm_function, 0, 0);
task_req_upiup->input_param1 = lrbp->lun;
task_req_upiup->input_param1 =
if (hba->lrb[pos].cmd) {
scsi_dma_unmap(hba->lrb[pos].cmd);
hba->lrb[pos].cmd->result =
- DID_ABORT << 16;
+ 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);
}
}
} /* end of for */
__clear_bit(tag, &hba->outstanding_reqs);
hba->lrb[tag].cmd = NULL;
spin_unlock_irqrestore(host->host_lock, flags);
+
+ clear_bit_unlock(tag, &hba->lrb_in_use);
+ wake_up(&hba->dev_cmd.tag_wq);
out:
return err;
}
int ret;
ret = ufshcd_link_startup(hba);
- if (!ret)
- scsi_scan_host(hba->host);
+ if (ret)
+ goto out;
+
+ ret = ufshcd_verify_dev_init(hba);
+ if (ret)
+ goto out;
+
+ scsi_scan_host(hba->host);
+out:
+ return;
}
static struct scsi_host_template ufshcd_driver_template = {
/* Initialize UIC command mutex */
mutex_init(&hba->uic_cmd_mutex);
+ /* Initialize mutex for device management commands */
+ mutex_init(&hba->dev_cmd.lock);
+
+ /* Initialize device management tag acquire wait queue */
+ init_waitqueue_head(&hba->dev_cmd.tag_wq);
+
/* IRQ registration */
err = devm_request_irq(dev, irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba);
if (err) {
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