Looks good to me. Reviewed-by: Yaniv Gardi <yga...@codeaurora.org> QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
= > -----Original Message----- = > From: linux-scsi-ow...@vger.kernel.org [mailto:linux-scsi- = > ow...@vger.kernel.org] On Behalf Of Raviv Shvili = > Sent: Thursday, August 29, 2013 6:00 PM = > To: linux-scsi@vger.kernel.org = > Cc: linux-arm-...@vger.kernel.org; Raviv Shvili; open list = > Subject: [RFC/PATCH 3/3] scsi: ufs: Logical Unit (LU) command queue = > depth = > = > Some of the UFS devices may support different number of commands that = > can be queued per LU. At the current implementation, SW configure each = > of the UFS devices LU's according to the controller capability. = > = > In this patch we read the queue depth available per LU and update the LU's = > SW structure. = > = > Signed-off-by: Raviv Shvili <rshv...@codeaurora.org> = > = > diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h index = > 202e15d..d42f424 100644 = > --- a/drivers/scsi/ufs/ufs.h = > +++ b/drivers/scsi/ufs/ufs.h = > @@ -132,6 +132,27 @@ enum desc_idn { = > QUERY_DESC_IDN_RFU_2 = 0x9, = > }; = > = > +#define UNIT_DESC_MAX_SIZE 0x22 = > +/* Unit descriptor parameters offsets in bytes*/ enum unit_desc_param { = > + UNIT_DESC_PARAM_LEN = 0x0, = > + UNIT_DESC_PARAM_TYPE = 0x1, = > + UNIT_DESC_PARAM_UNIT_INDEX = 0x2, = > + UNIT_DESC_PARAM_LU_ENABLE = 0x3, = > + UNIT_DESC_PARAM_BOOT_LUN_ID = 0x4, = > + UNIT_DESC_PARAM_LU_WR_PROTECT = 0x5, = > + UNIT_DESC_PARAM_LU_Q_DEPTH = 0x6, = > + UNIT_DESC_PARAM_MEM_TYPE = 0x8, = > + UNIT_DESC_PARAM_DATA_RELIABILITY = 0x9, = > + UNIT_DESC_PARAM_LOGICAL_BLK_SIZE = 0xA, = > + UNIT_DESC_PARAM_LOGICAL_BLK_COUNT = 0xB, = > + UNIT_DESC_PARAM_ERASE_BLK_SIZE = 0x13, = > + UNIT_DESC_PARAM_PROVISIONING_TYPE = 0x17, = > + UNIT_DESC_PARAM_PHY_MEM_RSRC_CNT = 0x18, = > + UNIT_DESC_PARAM_CTX_CAPABILITIES = 0x20, = > + UNIT_DESC_PARAM_LARGE_UNIT_SIZE_M1 = 0x22, = > +}; = > + = > /* Exception event mask values */ = > enum { = > MASK_EE_STATUS = 0xFFFF, = > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index = > d0cad34..9b0d769 100644 = > --- a/drivers/scsi/ufs/ufshcd.c = > +++ b/drivers/scsi/ufs/ufshcd.c = > @@ -111,6 +111,8 @@ 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); = > +static int ufshcd_read_sdev_qdepth(struct ufs_hba *hba, = > + struct scsi_device *sdev); = > = > /* = > * ufshcd_wait_for_register - wait for register value to change @@ - = > 1767,6 +1769,7 @@ static int ufshcd_verify_dev_init(struct ufs_hba *hba) = > static int ufshcd_slave_alloc(struct scsi_device *sdev) { = > struct ufs_hba *hba; = > + int lun_qdepth; = > = > hba = shost_priv(sdev->host); = > sdev->tagged_supported = 1; = > @@ -1777,6 +1780,14 @@ static int ufshcd_slave_alloc(struct scsi_device = > *sdev) = > = > /* allow SCSI layer to restart the device in case of errors */ = > sdev->allow_restart = 1; = > + lun_qdepth = ufshcd_read_sdev_qdepth(hba, sdev); = > + if (lun_qdepth == 0 || lun_qdepth > hba->nutrs) { = > + dev_info(hba->dev, "%s, lun %d queue depth is %d\n", = > __func__, = > + sdev->lun, lun_qdepth); = > + lun_qdepth = hba->nutrs; = > + } else if (lun_qdepth < 0) { = > + lun_qdepth = 1; = > + } = > = > /* = > * Inform SCSI Midlayer that the LUN queue depth is same as the = > @@ -1785,7 +1796,7 @@ static int ufshcd_slave_alloc(struct scsi_device = > *sdev) = > * SAM_STAT_TASK_SET_FULL, the LUN queue depth will be = > adjusted = > * with scsi_adjust_queue_depth. = > */ = > - scsi_activate_tcq(sdev, hba->nutrs); = > + scsi_activate_tcq(sdev, lun_qdepth); = > return 0; = > } = > = > @@ -2862,6 +2873,38 @@ static int ufshcd_eh_host_reset_handler(struct = > scsi_cmnd *cmd) } = > = > /** = > + * ufshcd_read_sdev_qdepth - read the lun command queue depth = > + * @hba: Pointer to adapter instance = > + * @sdev: pointer to SCSI device = > + * = > + * Return in case of success the lun's queue depth else error. = > + */ = > +static int ufshcd_read_sdev_qdepth(struct ufs_hba *hba, = > + struct scsi_device *sdev) = > +{ = > + int ret; = > + int buff_len = UNIT_DESC_MAX_SIZE; = > + u8 desc_buf[UNIT_DESC_MAX_SIZE]; = > + = > + ret = ufshcd_query_descriptor(hba, = > UPIU_QUERY_OPCODE_READ_DESC, = > + QUERY_DESC_IDN_UNIT, sdev->lun, 0, desc_buf, = > &buff_len); = > + = > + if (ret || (buff_len < UNIT_DESC_PARAM_LU_Q_DEPTH)) { = > + dev_err(hba->dev, = > + "%s:Failed reading unit descriptor. len = %d ret = = > %d" = > + , __func__, buff_len, ret); = > + if (!ret) = > + ret = -EINVAL; = > + = > + goto out; = > + } = > + = > + ret = desc_buf[UNIT_DESC_PARAM_LU_Q_DEPTH] & 0xFF; = > +out: = > + return ret; = > +} = > + = > +/** = > * ufshcd_async_scan - asynchronous execution for link startup = > * @data: data pointer to pass to this function = > * @cookie: cookie data = > -- = > QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. = > is a member of Code Aurora Forum, hosted by The Linux Foundation = > = > -- = > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the = > body of a message to majord...@vger.kernel.org More majordomo info = > at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
