#include <linux/async.h>
#include "ufshcd.h"
+#include "unipro.h"
#define UFSHCD_ENABLE_INTRS (UTP_TRANSFER_REQ_COMPL |\
UTP_TASK_REQ_COMPL |\
+ UIC_POWER_MODE |\
UFSHCD_ERROR_MASK)
/* 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 */
+
+/* Query request retries */
+#define QUERY_REQ_RETRIES 10
+/* Query request timeout */
+#define QUERY_REQ_TIMEOUT 30 /* msec */
+
+/* Expose the flag value from utp_upiu_query.value */
+#define MASK_QUERY_UPIU_FLAG_LOC 0xFF
+
+/* Interrupt aggregation default timeout, unit: 40us */
+#define INT_AGGR_DEF_TO 0x02
+
enum {
UFSHCD_MAX_CHANNEL = 0,
UFSHCD_MAX_ID = 1,
UFSHCD_INT_CLEAR,
};
-/* Interrupt aggregation options */
-enum {
- INT_AGGR_RESET,
- 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
}
/**
- * ufshcd_is_valid_req_rsp - checks if controller TR response is valid
- * @ucd_rsp_ptr: pointer to response UPIU
+ * ufshcd_get_dme_attr_val - Get the value of attribute returned by UIC command
+ * @hba: Pointer to adapter instance
*
- * This function checks the response UPIU for valid transaction type in
- * response field
- * Returns 0 on success, non-zero on failure
+ * This function gets UIC command argument3
+ * Returns 0 on success, non zero value on error
+ */
+static inline u32 ufshcd_get_dme_attr_val(struct ufs_hba *hba)
+{
+ return ufshcd_readl(hba, REG_UIC_COMMAND_ARG_3);
+}
+
+/**
+ * ufshcd_get_req_rsp - returns the TR response transaction type
+ * @ucd_rsp_ptr: pointer to response UPIU
*/
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;
}
/**
return be32_to_cpu(ucd_rsp_ptr->header.dword_1) & MASK_RSP_UPIU_RESULT;
}
+/*
+ * ufshcd_get_rsp_upiu_data_seg_len - Get the data segment length
+ * from response UPIU
+ * @ucd_rsp_ptr: pointer to response UPIU
+ *
+ * Return the data segment length.
+ */
+static inline unsigned int
+ufshcd_get_rsp_upiu_data_seg_len(struct utp_upiu_rsp *ucd_rsp_ptr)
+{
+ return be32_to_cpu(ucd_rsp_ptr->header.dword_2) &
+ MASK_RSP_UPIU_DATA_SEG_LEN;
+}
+
/**
- * ufshcd_config_int_aggr - Configure interrupt aggregation values.
- * Currently there is no use case where we want to configure
- * interrupt aggregation dynamically. So to configure interrupt
- * aggregation, #define INT_AGGR_COUNTER_THRESHOLD_VALUE and
- * INT_AGGR_TIMEOUT_VALUE are used.
+ * ufshcd_is_exception_event - Check if the device raised an exception event
+ * @ucd_rsp_ptr: pointer to response UPIU
+ *
+ * The function checks if the device raised an exception event indicated in
+ * the Device Information field of response UPIU.
+ *
+ * Returns true if exception is raised, false otherwise.
+ */
+static inline bool ufshcd_is_exception_event(struct utp_upiu_rsp *ucd_rsp_ptr)
+{
+ return be32_to_cpu(ucd_rsp_ptr->header.dword_2) &
+ MASK_RSP_EXCEPTION_EVENT ? true : false;
+}
+
+/**
+ * ufshcd_reset_intr_aggr - Reset interrupt aggregation values.
* @hba: per adapter instance
- * @option: Interrupt aggregation option
*/
static inline void
-ufshcd_config_int_aggr(struct ufs_hba *hba, int option)
+ufshcd_reset_intr_aggr(struct ufs_hba *hba)
{
- switch (option) {
- case INT_AGGR_RESET:
- ufshcd_writel(hba, INT_AGGR_ENABLE |
- INT_AGGR_COUNTER_AND_TIMER_RESET,
- REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL);
- break;
- case INT_AGGR_CONFIG:
- ufshcd_writel(hba, INT_AGGR_ENABLE | INT_AGGR_PARAM_WRITE |
- INT_AGGR_COUNTER_THRESHOLD_VALUE |
- INT_AGGR_TIMEOUT_VALUE,
- REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL);
- break;
- }
+ ufshcd_writel(hba, INT_AGGR_ENABLE |
+ INT_AGGR_COUNTER_AND_TIMER_RESET,
+ REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL);
+}
+
+/**
+ * ufshcd_config_intr_aggr - Configure interrupt aggregation values.
+ * @hba: per adapter instance
+ * @cnt: Interrupt aggregation counter threshold
+ * @tmout: Interrupt aggregation timeout value
+ */
+static inline void
+ufshcd_config_intr_aggr(struct ufs_hba *hba, u8 cnt, u8 tmout)
+{
+ ufshcd_writel(hba, INT_AGGR_ENABLE | INT_AGGR_PARAM_WRITE |
+ INT_AGGR_COUNTER_THLD_VAL(cnt) |
+ INT_AGGR_TIMEOUT_VAL(tmout),
+ REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL);
}
/**
static inline void ufshcd_copy_sense_data(struct ufshcd_lrb *lrbp)
{
int len;
- if (lrbp->sense_buffer) {
- len = be16_to_cpu(lrbp->ucd_rsp_ptr->sense_data_len);
+ if (lrbp->sense_buffer &&
+ ufshcd_get_rsp_upiu_data_seg_len(lrbp->ucd_rsp_ptr)) {
+ 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_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
+ * @lrb - pointer to local reference block
+ */
+static
+void ufshcd_copy_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+{
+ struct ufs_query_res *query_res = &hba->dev_cmd.query.response;
+
+ /* Get the UPIU response */
+ query_res->response = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr) >>
+ 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 */
+ if (lrbp->ucd_rsp_ptr->qr.opcode == UPIU_QUERY_OPCODE_READ_DESC) {
+ u8 *descp = (u8 *)&lrbp->ucd_rsp_ptr +
+ GENERAL_UPIU_REQUEST_SIZE;
+ u16 len;
+
+ /* data segment length */
+ len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2) &
+ MASK_QUERY_DATA_SEG_LEN;
+
+ memcpy(hba->dev_cmd.query.descriptor, descp,
+ min_t(u16, len, QUERY_DESC_MAX_SIZE));
+ }
+}
+
/**
* ufshcd_hba_capabilities - Read controller capabilities
* @hba: per adapter instance
return false;
}
+/**
+ * ufshcd_get_upmcrs - Get the power mode change request status
+ * @hba: Pointer to adapter instance
+ *
+ * This function gets the UPMCRS field of HCS register
+ * Returns value of UPMCRS field
+ */
+static inline u8 ufshcd_get_upmcrs(struct ufs_hba *hba)
+{
+ return (ufshcd_readl(hba, REG_CONTROLLER_STATUS) >> 8) & 0x7;
+}
+
/**
* ufshcd_dispatch_uic_cmd - Dispatch UIC commands to unipro layers
* @hba: per adapter instance
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)));
+}
+
+/**
+ * ufshcd_prepare_utp_query_req_upiu() - fills the utp_transfer_req_desc,
+ * for query requsts
+ * @hba: UFS hba
+ * @lrbp: local reference block pointer
+ * @upiu_flags: flags
+ */
+static void ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba,
+ struct ufshcd_lrb *lrbp, u32 upiu_flags)
+{
+ 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;
+ u8 *descp = (u8 *)lrbp->ucd_req_ptr + GENERAL_UPIU_REQUEST_SIZE;
+
+ /* Query request header */
+ ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD(
+ UPIU_TRANSACTION_QUERY_REQ, upiu_flags,
+ lrbp->lun, lrbp->task_tag);
+ ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD(
+ 0, query->request.query_func, 0, 0);
+
+ /* Data segment length */
+ ucd_req_ptr->header.dword_2 = UPIU_HEADER_DWORD(
+ 0, 0, len >> 8, (u8)len);
+
+ /* 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 ==
+ UPIU_QUERY_OPCODE_WRITE_DESC)) {
+ memcpy(descp, query->descriptor,
+ min_t(u16, len, QUERY_DESC_MAX_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_QUERY)
+ ufshcd_prepare_utp_query_req_upiu(
+ hba, lrbp, upiu_flags);
+ else 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_QUERY_RSP:
+ ufshcd_copy_query_response(hba, lrbp);
+ 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: Since there is only one available tag for device management commands,
+ * it is expected you hold the hba->dev_cmd.lock mutex.
+ */
+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_query_flag() - API function for sending flag query requests
+ * hba: per-adapter instance
+ * query_opcode: flag query to perform
+ * idn: flag idn to access
+ * flag_res: the flag value after the query request completes
+ *
+ * Returns 0 for success, non-zero in case of failure
+ */
+static int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
+ enum flag_idn idn, bool *flag_res)
+{
+ struct ufs_query_req *request;
+ struct ufs_query_res *response;
+ int err;
+
+ BUG_ON(!hba);
+
+ mutex_lock(&hba->dev_cmd.lock);
+ request = &hba->dev_cmd.query.request;
+ response = &hba->dev_cmd.query.response;
+ memset(request, 0, sizeof(struct ufs_query_req));
+ memset(response, 0, sizeof(struct ufs_query_res));
+
+ switch (opcode) {
+ case UPIU_QUERY_OPCODE_SET_FLAG:
+ case UPIU_QUERY_OPCODE_CLEAR_FLAG:
+ case UPIU_QUERY_OPCODE_TOGGLE_FLAG:
+ request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST;
+ break;
+ case UPIU_QUERY_OPCODE_READ_FLAG:
+ request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST;
+ if (!flag_res) {
+ /* No dummy reads */
+ dev_err(hba->dev, "%s: Invalid argument for read request\n",
+ __func__);
+ err = -EINVAL;
+ goto out_unlock;
+ }
+ break;
+ default:
+ dev_err(hba->dev,
+ "%s: Expected query flag opcode but got = %d\n",
+ __func__, opcode);
+ err = -EINVAL;
+ goto out_unlock;
+ }
+ request->upiu_req.opcode = opcode;
+ request->upiu_req.idn = idn;
+
+ /* Send query request */
+ err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY,
+ QUERY_REQ_TIMEOUT);
+
+ if (err) {
+ dev_err(hba->dev,
+ "%s: Sending flag query for idn %d failed, err = %d\n",
+ __func__, idn, err);
+ goto out_unlock;
+ }
+
+ if (flag_res)
+ *flag_res = (response->upiu_res.value &
+ MASK_QUERY_UPIU_FLAG_LOC) & 0x1;
+
+out_unlock:
+ mutex_unlock(&hba->dev_cmd.lock);
+ return err;
+}
+
+/**
+ * ufshcd_query_attr - API function for sending attribute requests
+ * hba: per-adapter instance
+ * opcode: attribute opcode
+ * idn: attribute idn to access
+ * index: index field
+ * selector: selector field
+ * attr_val: the attribute value after the query request completes
+ *
+ * Returns 0 for success, non-zero in case of failure
+*/
+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;
+ struct ufs_query_res *response;
+ int err;
+
+ BUG_ON(!hba);
+
+ if (!attr_val) {
+ dev_err(hba->dev, "%s: attribute value required for opcode 0x%x\n",
+ __func__, opcode);
+ err = -EINVAL;
+ goto out;
+ }
+
+ mutex_lock(&hba->dev_cmd.lock);
+ request = &hba->dev_cmd.query.request;
+ response = &hba->dev_cmd.query.response;
+ memset(request, 0, sizeof(struct ufs_query_req));
+ memset(response, 0, sizeof(struct ufs_query_res));
+
+ switch (opcode) {
+ case UPIU_QUERY_OPCODE_WRITE_ATTR:
+ request->query_func = UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST;
+ request->upiu_req.value = *attr_val;
+ break;
+ case UPIU_QUERY_OPCODE_READ_ATTR:
+ request->query_func = UPIU_QUERY_FUNC_STANDARD_READ_REQUEST;
+ break;
+ default:
+ dev_err(hba->dev, "%s: Expected query attr opcode but got = 0x%.2x\n",
+ __func__, opcode);
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ request->upiu_req.opcode = opcode;
+ request->upiu_req.idn = idn;
+ request->upiu_req.index = index;
+ request->upiu_req.selector = selector;
+
+ /* Send query request */
+ err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY,
+ QUERY_REQ_TIMEOUT);
+
+ if (err) {
+ dev_err(hba->dev, "%s: opcode 0x%.2x for idn %d failed, err = %d\n",
+ __func__, opcode, idn, err);
+ goto out_unlock;
+ }
+
+ *attr_val = response->upiu_res.value;
+
+out_unlock:
+ mutex_unlock(&hba->dev_cmd.lock);
+out:
+ 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 =
}
/**
- * ufshcd_dme_link_startup - Notify Unipro to perform link startup
+ * ufshcd_dme_link_startup - Notify Unipro to perform link startup
+ * @hba: per adapter instance
+ *
+ * UIC_CMD_DME_LINK_STARTUP command must be issued to Unipro layer,
+ * in order to initialize the Unipro link startup procedure.
+ * Once the Unipro links are up, the device connected to the controller
+ * is detected.
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+static int ufshcd_dme_link_startup(struct ufs_hba *hba)
+{
+ struct uic_command uic_cmd = {0};
+ int ret;
+
+ uic_cmd.command = UIC_CMD_DME_LINK_STARTUP;
+
+ ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+ if (ret)
+ dev_err(hba->dev,
+ "dme-link-startup: error code %d\n", ret);
+ return ret;
+}
+
+/**
+ * ufshcd_dme_set_attr - UIC command for DME_SET, DME_PEER_SET
+ * @hba: per adapter instance
+ * @attr_sel: uic command argument1
+ * @attr_set: attribute set type as uic command argument2
+ * @mib_val: setting value as uic command argument3
+ * @peer: indicate whether peer or local
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
+ u8 attr_set, u32 mib_val, u8 peer)
+{
+ struct uic_command uic_cmd = {0};
+ static const char *const action[] = {
+ "dme-set",
+ "dme-peer-set"
+ };
+ const char *set = action[!!peer];
+ int ret;
+
+ uic_cmd.command = peer ?
+ UIC_CMD_DME_PEER_SET : UIC_CMD_DME_SET;
+ uic_cmd.argument1 = attr_sel;
+ uic_cmd.argument2 = UIC_ARG_ATTR_TYPE(attr_set);
+ uic_cmd.argument3 = mib_val;
+
+ ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+ if (ret)
+ dev_err(hba->dev, "%s: attr-id 0x%x val 0x%x error code %d\n",
+ set, UIC_GET_ATTR_ID(attr_sel), mib_val, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ufshcd_dme_set_attr);
+
+/**
+ * ufshcd_dme_get_attr - UIC command for DME_GET, DME_PEER_GET
+ * @hba: per adapter instance
+ * @attr_sel: uic command argument1
+ * @mib_val: the value of the attribute as returned by the UIC command
+ * @peer: indicate whether peer or local
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
+ u32 *mib_val, u8 peer)
+{
+ struct uic_command uic_cmd = {0};
+ static const char *const action[] = {
+ "dme-get",
+ "dme-peer-get"
+ };
+ const char *get = action[!!peer];
+ int ret;
+
+ uic_cmd.command = peer ?
+ UIC_CMD_DME_PEER_GET : UIC_CMD_DME_GET;
+ uic_cmd.argument1 = attr_sel;
+
+ ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+ if (ret) {
+ dev_err(hba->dev, "%s: attr-id 0x%x error code %d\n",
+ get, UIC_GET_ATTR_ID(attr_sel), ret);
+ goto out;
+ }
+
+ if (mib_val)
+ *mib_val = uic_cmd.argument3;
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr);
+
+/**
+ * ufshcd_uic_change_pwr_mode - Perform the UIC power mode chage
+ * using DME_SET primitives.
* @hba: per adapter instance
- *
- * UIC_CMD_DME_LINK_STARTUP command must be issued to Unipro layer,
- * in order to initialize the Unipro link startup procedure.
- * Once the Unipro links are up, the device connected to the controller
- * is detected.
+ * @mode: powr mode value
*
* Returns 0 on success, non-zero value on failure
*/
-static int ufshcd_dme_link_startup(struct ufs_hba *hba)
+int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode)
{
struct uic_command uic_cmd = {0};
+ struct completion pwr_done;
+ unsigned long flags;
+ u8 status;
int ret;
- uic_cmd.command = UIC_CMD_DME_LINK_STARTUP;
+ uic_cmd.command = UIC_CMD_DME_SET;
+ uic_cmd.argument1 = UIC_ARG_MIB(PA_PWRMODE);
+ uic_cmd.argument3 = mode;
+ init_completion(&pwr_done);
- ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
- if (ret)
+ mutex_lock(&hba->uic_cmd_mutex);
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ hba->pwr_done = &pwr_done;
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ ret = __ufshcd_send_uic_cmd(hba, &uic_cmd);
+ if (ret) {
dev_err(hba->dev,
- "dme-link-startup: error code %d\n", ret);
+ "pwr mode change with mode 0x%x uic error %d\n",
+ mode, ret);
+ goto out;
+ }
+
+ if (!wait_for_completion_timeout(hba->pwr_done,
+ msecs_to_jiffies(UIC_CMD_TIMEOUT))) {
+ dev_err(hba->dev,
+ "pwr mode change with mode 0x%x completion timeout\n",
+ mode);
+ ret = -ETIMEDOUT;
+ goto out;
+ }
+
+ status = ufshcd_get_upmcrs(hba);
+ if (status != PWR_LOCAL) {
+ dev_err(hba->dev,
+ "pwr mode change failed, host umpcrs:0x%x\n",
+ status);
+ ret = (status != PWR_OK) ? status : -1;
+ }
+out:
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ hba->pwr_done = NULL;
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ mutex_unlock(&hba->uic_cmd_mutex);
return ret;
}
+/**
+ * ufshcd_complete_dev_init() - checks device readiness
+ * hba: per-adapter instance
+ *
+ * Set fDeviceInit flag and poll until device toggles it.
+ */
+static int ufshcd_complete_dev_init(struct ufs_hba *hba)
+{
+ int i, retries, err = 0;
+ bool flag_res = 1;
+
+ for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) {
+ /* Set the fDeviceInit flag */
+ err = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_SET_FLAG,
+ QUERY_FLAG_IDN_FDEVICEINIT, NULL);
+ if (!err || err == -ETIMEDOUT)
+ break;
+ dev_dbg(hba->dev, "%s: error %d retrying\n", __func__, err);
+ }
+ if (err) {
+ dev_err(hba->dev,
+ "%s setting fDeviceInit flag failed with error %d\n",
+ __func__, err);
+ goto out;
+ }
+
+ /* poll for max. 100 iterations for fDeviceInit flag to clear */
+ for (i = 0; i < 100 && !err && flag_res; i++) {
+ for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) {
+ err = ufshcd_query_flag(hba,
+ UPIU_QUERY_OPCODE_READ_FLAG,
+ QUERY_FLAG_IDN_FDEVICEINIT, &flag_res);
+ if (!err || err == -ETIMEDOUT)
+ break;
+ dev_dbg(hba->dev, "%s: error %d retrying\n", __func__,
+ err);
+ }
+ }
+ if (err)
+ dev_err(hba->dev,
+ "%s reading fDeviceInit flag failed with error %d\n",
+ __func__, err);
+ else if (flag_res)
+ dev_err(hba->dev,
+ "%s fDeviceInit was not cleared by the device\n",
+ __func__);
+
+out:
+ return err;
+}
+
/**
* ufshcd_make_hba_operational - Make UFS controller operational
* @hba: per adapter instance
ufshcd_enable_intr(hba, UFSHCD_ENABLE_INTRS);
/* Configure interrupt aggregation */
- ufshcd_config_int_aggr(hba, INT_AGGR_CONFIG);
+ ufshcd_config_intr_aggr(hba, hba->nutrs - 1, INT_AGGR_DEF_TO);
/* Configure UTRL and UTMRL base address registers */
ufshcd_writel(hba, lower_32_bits(hba->utrdl_dma_addr),
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;
int result = 0;
switch (scsi_status) {
- case SAM_STAT_GOOD:
- result |= DID_OK << 16 |
- COMMAND_COMPLETE << 8 |
- SAM_STAT_GOOD;
- break;
case SAM_STAT_CHECK_CONDITION:
+ ufshcd_copy_sense_data(lrbp);
+ case SAM_STAT_GOOD:
result |= DID_OK << 16 |
COMMAND_COMPLETE << 8 |
- SAM_STAT_CHECK_CONDITION;
- ufshcd_copy_sense_data(lrbp);
- break;
- case SAM_STAT_BUSY:
- result |= SAM_STAT_BUSY;
+ scsi_status;
break;
case SAM_STAT_TASK_SET_FULL:
-
/*
* If a LUN reports SAM_STAT_TASK_SET_FULL, then the LUN queue
* depth needs to be adjusted to the exact number of
* outstanding commands the LUN can handle at any given time.
*/
ufshcd_adjust_lun_qdepth(lrbp->cmd);
- result |= SAM_STAT_TASK_SET_FULL;
- break;
+ case SAM_STAT_BUSY:
case SAM_STAT_TASK_ABORTED:
- result |= SAM_STAT_TASK_ABORTED;
+ ufshcd_copy_sense_data(lrbp);
+ result |= scsi_status;
break;
default:
result |= DID_ERROR << 16;
switch (ocs) {
case OCS_SUCCESS:
+ result = ufshcd_get_req_rsp(lrbp->ucd_rsp_ptr);
+
+ 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);
- /* check if the returned transfer response is valid */
- result = ufshcd_is_valid_req_rsp(lrbp->ucd_rsp_ptr);
- if (result) {
+ if (ufshcd_is_exception_event(lrbp->ucd_rsp_ptr))
+ schedule_work(&hba->eeh_work);
+ break;
+ case UPIU_TRANSACTION_REJECT_UPIU:
+ /* TODO: handle Reject UPIU Response */
+ result = DID_ERROR << 16;
+ dev_err(hba->dev,
+ "Reject UPIU not fully implemented\n");
+ break;
+ default:
+ result = DID_ERROR << 16;
dev_err(hba->dev,
- "Invalid response = %x\n", result);
+ "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;
/**
* ufshcd_uic_cmd_compl - handle completion of uic command
* @hba: per adapter instance
+ * @intr_status: interrupt status generated by the controller
*/
-static void ufshcd_uic_cmd_compl(struct ufs_hba *hba)
+static void ufshcd_uic_cmd_compl(struct ufs_hba *hba, u32 intr_status)
{
- if (hba->active_uic_cmd) {
+ if ((intr_status & UIC_COMMAND_COMPL) && hba->active_uic_cmd) {
hba->active_uic_cmd->argument2 |=
ufshcd_get_uic_cmd_result(hba);
+ hba->active_uic_cmd->argument3 =
+ ufshcd_get_dme_attr_val(hba);
complete(&hba->active_uic_cmd->done);
}
+
+ if ((intr_status & UIC_POWER_MODE) && hba->pwr_done)
+ complete(hba->pwr_done);
}
/**
*/
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_reset_intr_aggr(hba);
+}
+
+/**
+ * ufshcd_disable_ee - disable exception event
+ * @hba: per-adapter instance
+ * @mask: exception event to disable
+ *
+ * Disables exception event in the device so that the EVENT_ALERT
+ * bit is not set.
+ *
+ * Returns zero on success, non-zero error value on failure.
+ */
+static int ufshcd_disable_ee(struct ufs_hba *hba, u16 mask)
+{
+ int err = 0;
+ u32 val;
+
+ if (!(hba->ee_ctrl_mask & mask))
+ goto out;
+
+ val = hba->ee_ctrl_mask & ~mask;
+ val &= 0xFFFF; /* 2 bytes */
+ err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
+ if (!err)
+ hba->ee_ctrl_mask &= ~mask;
+out:
+ return err;
+}
+
+/**
+ * ufshcd_enable_ee - enable exception event
+ * @hba: per-adapter instance
+ * @mask: exception event to enable
+ *
+ * Enable corresponding exception event in the device to allow
+ * device to alert host in critical scenarios.
+ *
+ * Returns zero on success, non-zero error value on failure.
+ */
+static int ufshcd_enable_ee(struct ufs_hba *hba, u16 mask)
+{
+ int err = 0;
+ u32 val;
+
+ if (hba->ee_ctrl_mask & mask)
+ goto out;
+
+ val = hba->ee_ctrl_mask | mask;
+ val &= 0xFFFF; /* 2 bytes */
+ err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
+ if (!err)
+ hba->ee_ctrl_mask |= mask;
+out:
+ return err;
+}
+
+/**
+ * ufshcd_enable_auto_bkops - Allow device managed BKOPS
+ * @hba: per-adapter instance
+ *
+ * Allow device to manage background operations on its own. Enabling
+ * this might lead to inconsistent latencies during normal data transfers
+ * as the device is allowed to manage its own way of handling background
+ * operations.
+ *
+ * Returns zero on success, non-zero on failure.
+ */
+static int ufshcd_enable_auto_bkops(struct ufs_hba *hba)
+{
+ int err = 0;
+
+ if (hba->auto_bkops_enabled)
+ goto out;
+
+ err = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_SET_FLAG,
+ QUERY_FLAG_IDN_BKOPS_EN, NULL);
+ if (err) {
+ dev_err(hba->dev, "%s: failed to enable bkops %d\n",
+ __func__, err);
+ goto out;
+ }
+
+ hba->auto_bkops_enabled = true;
+
+ /* No need of URGENT_BKOPS exception from the device */
+ err = ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS);
+ if (err)
+ dev_err(hba->dev, "%s: failed to disable exception event %d\n",
+ __func__, err);
+out:
+ return err;
+}
+
+/**
+ * ufshcd_disable_auto_bkops - block device in doing background operations
+ * @hba: per-adapter instance
+ *
+ * Disabling background operations improves command response latency but
+ * has drawback of device moving into critical state where the device is
+ * not-operable. Make sure to call ufshcd_enable_auto_bkops() whenever the
+ * host is idle so that BKOPS are managed effectively without any negative
+ * impacts.
+ *
+ * Returns zero on success, non-zero on failure.
+ */
+static int ufshcd_disable_auto_bkops(struct ufs_hba *hba)
+{
+ int err = 0;
+
+ if (!hba->auto_bkops_enabled)
+ goto out;
+
+ /*
+ * If host assisted BKOPs is to be enabled, make sure
+ * urgent bkops exception is allowed.
+ */
+ err = ufshcd_enable_ee(hba, MASK_EE_URGENT_BKOPS);
+ if (err) {
+ dev_err(hba->dev, "%s: failed to enable exception event %d\n",
+ __func__, err);
+ goto out;
+ }
+
+ err = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_CLEAR_FLAG,
+ QUERY_FLAG_IDN_BKOPS_EN, NULL);
+ if (err) {
+ dev_err(hba->dev, "%s: failed to disable bkops %d\n",
+ __func__, err);
+ ufshcd_disable_ee(hba, MASK_EE_URGENT_BKOPS);
+ goto out;
+ }
+
+ hba->auto_bkops_enabled = false;
+out:
+ return err;
+}
+
+/**
+ * ufshcd_force_reset_auto_bkops - force enable of auto bkops
+ * @hba: per adapter instance
+ *
+ * After a device reset the device may toggle the BKOPS_EN flag
+ * to default value. The s/w tracking variables should be updated
+ * as well. Do this by forcing enable of auto bkops.
+ */
+static void ufshcd_force_reset_auto_bkops(struct ufs_hba *hba)
+{
+ hba->auto_bkops_enabled = false;
+ hba->ee_ctrl_mask |= MASK_EE_URGENT_BKOPS;
+ ufshcd_enable_auto_bkops(hba);
+}
+
+static inline int ufshcd_get_bkops_status(struct ufs_hba *hba, u32 *status)
+{
+ return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+ QUERY_ATTR_IDN_BKOPS_STATUS, 0, 0, status);
+}
+
+/**
+ * ufshcd_urgent_bkops - handle urgent bkops exception event
+ * @hba: per-adapter instance
+ *
+ * Enable fBackgroundOpsEn flag in the device to permit background
+ * operations.
+ */
+static int ufshcd_urgent_bkops(struct ufs_hba *hba)
+{
+ int err;
+ u32 status = 0;
+
+ err = ufshcd_get_bkops_status(hba, &status);
+ if (err) {
+ dev_err(hba->dev, "%s: failed to get BKOPS status %d\n",
+ __func__, err);
+ goto out;
+ }
+
+ status = status & 0xF;
+
+ /* handle only if status indicates performance impact or critical */
+ if (status >= BKOPS_STATUS_PERF_IMPACT)
+ err = ufshcd_enable_auto_bkops(hba);
+out:
+ return err;
+}
+
+static inline int ufshcd_get_ee_status(struct ufs_hba *hba, u32 *status)
+{
+ return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+ QUERY_ATTR_IDN_EE_STATUS, 0, 0, status);
+}
+
+/**
+ * ufshcd_exception_event_handler - handle exceptions raised by device
+ * @work: pointer to work data
+ *
+ * Read bExceptionEventStatus attribute from the device and handle the
+ * exception event accordingly.
+ */
+static void ufshcd_exception_event_handler(struct work_struct *work)
+{
+ struct ufs_hba *hba;
+ int err;
+ u32 status = 0;
+ hba = container_of(work, struct ufs_hba, eeh_work);
+
+ pm_runtime_get_sync(hba->dev);
+ err = ufshcd_get_ee_status(hba, &status);
+ if (err) {
+ dev_err(hba->dev, "%s: failed to get exception status %d\n",
+ __func__, err);
+ goto out;
+ }
+
+ status &= hba->ee_ctrl_mask;
+ if (status & MASK_EE_URGENT_BKOPS) {
+ err = ufshcd_urgent_bkops(hba);
+ if (err)
+ dev_err(hba->dev, "%s: failed to handle urgent bkops %d\n",
+ __func__, err);
+ }
+out:
+ pm_runtime_put_sync(hba->dev);
+ return;
}
/**
struct ufs_hba *hba;
hba = container_of(work, struct ufs_hba, feh_workq);
+ pm_runtime_get_sync(hba->dev);
/* check if reset is already in progress */
if (hba->ufshcd_state != UFSHCD_STATE_RESET)
ufshcd_do_reset(hba);
+ pm_runtime_put_sync(hba->dev);
}
/**
if (hba->errors)
ufshcd_err_handler(hba);
- if (intr_status & UIC_COMMAND_COMPL)
- ufshcd_uic_cmd_compl(hba);
+ if (intr_status & UFSHCD_UIC_MASK)
+ ufshcd_uic_cmd_compl(hba, intr_status);
if (intr_status & UTP_TASK_REQ_COMPL)
ufshcd_tmc_handler(hba);
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;
+
+ ret = ufshcd_complete_dev_init(hba);
+ if (ret)
+ goto out;
+
+ ufshcd_force_reset_auto_bkops(hba);
+ scsi_scan_host(hba->host);
+ pm_runtime_put_sync(hba->dev);
+out:
+ return;
}
static struct scsi_host_template ufshcd_driver_template = {
}
EXPORT_SYMBOL_GPL(ufshcd_resume);
+int ufshcd_runtime_suspend(struct ufs_hba *hba)
+{
+ if (!hba)
+ return 0;
+
+ /*
+ * The device is idle with no requests in the queue,
+ * allow background operations.
+ */
+ return ufshcd_enable_auto_bkops(hba);
+}
+EXPORT_SYMBOL(ufshcd_runtime_suspend);
+
+int ufshcd_runtime_resume(struct ufs_hba *hba)
+{
+ if (!hba)
+ return 0;
+
+ return ufshcd_disable_auto_bkops(hba);
+}
+EXPORT_SYMBOL(ufshcd_runtime_resume);
+
+int ufshcd_runtime_idle(struct ufs_hba *hba)
+{
+ return 0;
+}
+EXPORT_SYMBOL(ufshcd_runtime_idle);
+
/**
* ufshcd_remove - de-allocate SCSI host and host memory space
* data structure memory
*/
void ufshcd_remove(struct ufs_hba *hba)
{
+ scsi_remove_host(hba->host);
/* disable interrupts */
ufshcd_disable_intr(hba, hba->intr_mask);
ufshcd_hba_stop(hba);
- scsi_remove_host(hba->host);
scsi_host_put(hba->host);
}
EXPORT_SYMBOL_GPL(ufshcd_remove);
/* Initialize work queues */
INIT_WORK(&hba->feh_workq, ufshcd_fatal_err_handler);
+ INIT_WORK(&hba->eeh_work, ufshcd_exception_event_handler);
/* 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) {
*hba_handle = hba;
+ /* Hold auto suspend until async scan completes */
+ pm_runtime_get_sync(dev);
+
async_schedule(ufshcd_async_scan, hba);
return 0;
projects / mirror_ubuntu-artful-kernel.git / blobdiff