lpfc 8.3.45: Incorporated support of a low-latency io path

diff -upNr a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
@@ -529,6 +529,27 @@ lpfc_sli4_protocol_show(struct device *d
 }
 
 /**
+ * lpfc_oas_supported_show - Return whether or not Optimized Access Storage
+ *			    (OAS) is supported.
+ * @dev: class unused variable.
+ * @attr: device attribute, not used.
+ * @buf: on return contains the module description text.
+ *
+ * Returns: size of formatted string.
+ **/
+static ssize_t
+lpfc_oas_supported_show(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;
+	struct lpfc_hba *phba = vport->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			phba->sli4_hba.pc_sli4_params.oas_supported);
+}
+
+/**
  * lpfc_link_state_store - Transition the link_state on an HBA port
  * @dev: class device that is converted into a Scsi_host.
  * @attr: device attribute, not used.

@@ -2041,9 +2062,53 @@ static DEVICE_ATTR(lpfc_dss, S_IRUGO, lp
 static DEVICE_ATTR(lpfc_sriov_hw_max_virtfn, S_IRUGO,
 		   lpfc_sriov_hw_max_virtfn_show, NULL);
 static DEVICE_ATTR(protocol, S_IRUGO, lpfc_sli4_protocol_show, NULL);
+static DEVICE_ATTR(lpfc_xlane_supported, S_IRUGO, lpfc_oas_supported_show,
+		   NULL);
 
 static char *lpfc_soft_wwn_key = "C99G71SL8032A";
+#define WWN_SZ 8
+/**
+ * lpfc_wwn_set - Convert string to the 8 byte WWN value.
+ * @buf: WWN string.
+ * @cnt: Length of string.
+ * @wwn: Array to receive converted wwn value.
+ *
+ * Returns:
+ * -EINVAL if the buffer does not contain a valid wwn
+ * 0 success
+ **/
+static size_t
+lpfc_wwn_set(const char *buf, size_t cnt, char wwn[])
+{
+	unsigned int i, j;
+
+	/* Count may include a LF at end of string */
+	if (buf[cnt-1] == '\n')
+		cnt--;
 
+	if ((cnt < 16) || (cnt > 18) || ((cnt == 17) && (*buf++ != 'x')) ||
+	    ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
+		return -EINVAL;
+
+	memset(wwn, 0, WWN_SZ);
+
+	/* Validate and store the new name */
+	for (i = 0, j = 0; i < 16; i++) {
+		if ((*buf >= 'a') && (*buf <= 'f'))
+			j = ((j << 4) | ((*buf++ - 'a') + 10));
+		else if ((*buf >= 'A') && (*buf <= 'F'))
+			j = ((j << 4) | ((*buf++ - 'A') + 10));
+		else if ((*buf >= '0') && (*buf <= '9'))
+			j = ((j << 4) | (*buf++ - '0'));
+		else
+			return -EINVAL;
+		if (i % 2) {
+			wwn[i/2] = j & 0xff;
+			j = 0;
+		}
+	}
+	return 0;
+}
 /**
  * lpfc_soft_wwn_enable_store - Allows setting of the wwn if the key is valid
  * @dev: class device that is converted into a Scsi_host.

@@ -2132,9 +2197,9 @@ lpfc_soft_wwpn_store(struct device *dev,
 	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 	struct lpfc_hba   *phba = vport->phba;
 	struct completion online_compl;
-	int stat1=0, stat2=0;
-	unsigned int i, j, cnt=count;
-	u8 wwpn[8];
+	int stat1 = 0, stat2 = 0;
+	unsigned int cnt = count;
+	u8 wwpn[WWN_SZ];
 	int rc;
 
 	if (!phba->cfg_enable_hba_reset)

@@ -2149,29 +2214,19 @@ lpfc_soft_wwpn_store(struct device *dev,
 	if (buf[cnt-1] == '\n')
 		cnt--;
 
-	if (!phba->soft_wwn_enable || (cnt < 16) || (cnt > 18) ||
-	    ((cnt == 17) && (*buf++ != 'x')) ||
-	    ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
+	if (!phba->soft_wwn_enable)
 		return -EINVAL;
 
+	/* lock setting wwpn, wwnn down */
 	phba->soft_wwn_enable = 0;
 
-	memset(wwpn, 0, sizeof(wwpn));
-
-	/* Validate and store the new name */
-	for (i=0, j=0; i < 16; i++) {
-		int value;
-
-		value = hex_to_bin(*buf++);
-		if (value >= 0)
-			j = (j << 4) | value;
-		else
-			return -EINVAL;
-		if (i % 2) {
-			wwpn[i/2] = j & 0xff;
-			j = 0;
-		}
+	rc = lpfc_wwn_set(buf, cnt, wwpn);
+	if (!rc) {
+		/* not able to set wwpn, unlock it */
+		phba->soft_wwn_enable = 1;
+		return rc;
 	}
+
 	phba->cfg_soft_wwpn = wwn_to_u64(wwpn);
 	fc_host_port_name(shost) = phba->cfg_soft_wwpn;
 	if (phba->cfg_soft_wwnn)

@@ -2198,7 +2253,7 @@ lpfc_soft_wwpn_store(struct device *dev,
 				"reinit adapter - %d\n", stat2);
 	return (stat1 || stat2) ? -EIO : count;
 }
-static DEVICE_ATTR(lpfc_soft_wwpn, S_IRUGO | S_IWUSR,\
+static DEVICE_ATTR(lpfc_soft_wwpn, S_IRUGO | S_IWUSR,
 		   lpfc_soft_wwpn_show, lpfc_soft_wwpn_store);
 
 /**

@@ -2235,39 +2290,25 @@ lpfc_soft_wwnn_store(struct device *dev,
 {
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
-	unsigned int i, j, cnt=count;
-	u8 wwnn[8];
+	unsigned int cnt = count;
+	u8 wwnn[WWN_SZ];
+	int rc;
 
 	/* count may include a LF at end of string */
 	if (buf[cnt-1] == '\n')
 		cnt--;
 
-	if (!phba->soft_wwn_enable || (cnt < 16) || (cnt > 18) ||
-	    ((cnt == 17) && (*buf++ != 'x')) ||
-	    ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
+	if (!phba->soft_wwn_enable)
 		return -EINVAL;
 
-	/*
-	 * Allow wwnn to be set many times, as long as the enable is set.
-	 * However, once the wwpn is set, everything locks.
-	 */
-
-	memset(wwnn, 0, sizeof(wwnn));
-
-	/* Validate and store the new name */
-	for (i=0, j=0; i < 16; i++) {
-		int value;
-
-		value = hex_to_bin(*buf++);
-		if (value >= 0)
-			j = (j << 4) | value;
-		else
-			return -EINVAL;
-		if (i % 2) {
-			wwnn[i/2] = j & 0xff;
-			j = 0;
-		}
+	rc = lpfc_wwn_set(buf, cnt, wwnn);
+	if (!rc) {
+		/* Allow wwnn to be set many times, as long as the enable
+		 * is set. However, once the wwpn is set, everything locks.
+		 */
+		return rc;
 	}
+
 	phba->cfg_soft_wwnn = wwn_to_u64(wwnn);
 
 	dev_printk(KERN_NOTICE, &phba->pcidev->dev,

@@ -2276,9 +2317,438 @@ lpfc_soft_wwnn_store(struct device *dev,
 
 	return count;
 }
-static DEVICE_ATTR(lpfc_soft_wwnn, S_IRUGO | S_IWUSR,\
+static DEVICE_ATTR(lpfc_soft_wwnn, S_IRUGO | S_IWUSR,
 		   lpfc_soft_wwnn_show, lpfc_soft_wwnn_store);
 
+/**
+ * lpfc_oas_tgt_show - Return wwpn of target whose luns maybe enabled for
+ *		      Optimized Access Storage (OAS) operations.
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ *
+ * Returns:
+ * value of count
+ **/
+static ssize_t
+lpfc_oas_tgt_show(struct device *dev, struct device_attribute *attr,
+		  char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "0x%llx\n",
+			wwn_to_u64(phba->cfg_oas_tgt_wwpn));
+}
+
+/**
+ * lpfc_oas_tgt_store - Store wwpn of target whose luns maybe enabled for
+ *		      Optimized Access Storage (OAS) operations.
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ * @count: Size of the data buffer.
+ *
+ * Returns:
+ * -EINVAL count is invalid, invalid wwpn byte invalid
+ * -EPERM oas is not supported by hba
+ * value of count on success
+ **/
+static ssize_t
+lpfc_oas_tgt_store(struct device *dev, struct device_attribute *attr,
+		   const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+	unsigned int cnt = count;
+	uint8_t wwpn[WWN_SZ];
+	int rc;
+
+	if (!phba->cfg_EnableXLane)
+		return -EPERM;
+
+	/* count may include a LF at end of string */
+	if (buf[cnt-1] == '\n')
+		cnt--;
+
+	rc = lpfc_wwn_set(buf, cnt, wwpn);
+	if (rc)
+		return rc;
+
+	memcpy(phba->cfg_oas_tgt_wwpn, wwpn, (8 * sizeof(uint8_t)));
+	memcpy(phba->sli4_hba.oas_next_tgt_wwpn, wwpn, (8 * sizeof(uint8_t)));
+	if (wwn_to_u64(wwpn) == 0)
+		phba->cfg_oas_flags |= OAS_FIND_ANY_TARGET;
+	else
+		phba->cfg_oas_flags &= ~OAS_FIND_ANY_TARGET;
+	phba->cfg_oas_flags &= ~OAS_LUN_VALID;
+	phba->sli4_hba.oas_next_lun = FIND_FIRST_OAS_LUN;
+	return count;
+}
+static DEVICE_ATTR(lpfc_xlane_tgt, S_IRUGO | S_IWUSR,
+		   lpfc_oas_tgt_show, lpfc_oas_tgt_store);
+
+/**
+ * lpfc_oas_vpt_show - Return wwpn of vport whose targets maybe enabled
+ *		      for Optimized Access Storage (OAS) operations.
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ *
+ * Returns:
+ * value of count on success
+ **/
+static ssize_t
+lpfc_oas_vpt_show(struct device *dev, struct device_attribute *attr,
+		  char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "0x%llx\n",
+			wwn_to_u64(phba->cfg_oas_vpt_wwpn));
+}
+
+/**
+ * lpfc_oas_vpt_store - Store wwpn of vport whose targets maybe enabled
+ *		      for Optimized Access Storage (OAS) operations.
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ * @count: Size of the data buffer.
+ *
+ * Returns:
+ * -EINVAL count is invalid, invalid wwpn byte invalid
+ * -EPERM oas is not supported by hba
+ * value of count on success
+ **/
+static ssize_t
+lpfc_oas_vpt_store(struct device *dev, struct device_attribute *attr,
+		   const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+	unsigned int cnt = count;
+	uint8_t wwpn[WWN_SZ];
+	int rc;
+
+	if (!phba->cfg_EnableXLane)
+		return -EPERM;
+
+	/* count may include a LF at end of string */
+	if (buf[cnt-1] == '\n')
+		cnt--;
+
+	rc = lpfc_wwn_set(buf, cnt, wwpn);
+	if (rc)
+		return rc;
+
+	memcpy(phba->cfg_oas_vpt_wwpn, wwpn, (8 * sizeof(uint8_t)));
+	memcpy(phba->sli4_hba.oas_next_vpt_wwpn, wwpn, (8 * sizeof(uint8_t)));
+	if (wwn_to_u64(wwpn) == 0)
+		phba->cfg_oas_flags |= OAS_FIND_ANY_VPORT;
+	else
+		phba->cfg_oas_flags &= ~OAS_FIND_ANY_VPORT;
+	phba->cfg_oas_flags &= ~OAS_LUN_VALID;
+	phba->sli4_hba.oas_next_lun = FIND_FIRST_OAS_LUN;
+	return count;
+}
+static DEVICE_ATTR(lpfc_xlane_vpt, S_IRUGO | S_IWUSR,
+		   lpfc_oas_vpt_show, lpfc_oas_vpt_store);
+
+/**
+ * lpfc_oas_lun_state_show - Return the current state (enabled or disabled)
+ *			    of whether luns will be enabled or disabled
+ *			    for Optimized Access Storage (OAS) operations.
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ *
+ * Returns:
+ * size of formatted string.
+ **/
+static ssize_t
+lpfc_oas_lun_state_show(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", phba->cfg_oas_lun_state);
+}
+
+/**
+ * lpfc_oas_lun_state_store - Store the state (enabled or disabled)
+ *			    of whether luns will be enabled or disabled
+ *			    for Optimized Access Storage (OAS) operations.
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ * @count: Size of the data buffer.
+ *
+ * Returns:
+ * -EINVAL count is invalid, invalid wwpn byte invalid
+ * -EPERM oas is not supported by hba
+ * value of count on success
+ **/
+static ssize_t
+lpfc_oas_lun_state_store(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+	int val = 0;
+
+	if (!phba->cfg_EnableXLane)
+		return -EPERM;
+
+	if (!isdigit(buf[0]))
+		return -EINVAL;
+
+	if (sscanf(buf, "%i", &val) != 1)
+		return -EINVAL;
+
+	if ((val != 0) && (val != 1))
+		return -EINVAL;
+
+	phba->cfg_oas_lun_state = val;
+
+	return strlen(buf);
+}
+static DEVICE_ATTR(lpfc_xlane_lun_state, S_IRUGO | S_IWUSR,
+		   lpfc_oas_lun_state_show, lpfc_oas_lun_state_store);
+
+/**
+ * lpfc_oas_lun_status_show - Return the status of the Optimized Access
+ *                          Storage (OAS) lun returned by the
+ *                          lpfc_oas_lun_show function.
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ *
+ * Returns:
+ * size of formatted string.
+ **/
+static ssize_t
+lpfc_oas_lun_status_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+
+	if (!(phba->cfg_oas_flags & OAS_LUN_VALID))
+		return -EFAULT;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", phba->cfg_oas_lun_status);
+}
+static DEVICE_ATTR(lpfc_xlane_lun_status, S_IRUGO,
+		   lpfc_oas_lun_status_show, NULL);
+
+
+/**
+ * lpfc_oas_lun_state_set - enable or disable a lun for Optimized Access Storage
+ *			   (OAS) operations.
+ * @phba: lpfc_hba pointer.
+ * @ndlp: pointer to fcp target node.
+ * @lun: the fc lun for setting oas state.
+ * @oas_state: the oas state to be set to the lun.
+ *
+ * Returns:
+ * SUCCESS : 0
+ * -EPERM OAS is not enabled or not supported by this port.
+ *
+ */
+static size_t
+lpfc_oas_lun_state_set(struct lpfc_hba *phba, uint8_t vpt_wwpn[],
+		       uint8_t tgt_wwpn[], uint64_t lun, uint32_t oas_state)
+{
+
+	int rc = 0;
+
+	if (!phba->cfg_EnableXLane)
+		return -EPERM;
+
+	if (oas_state) {
+		if (!lpfc_enable_oas_lun(phba, (struct lpfc_name *)vpt_wwpn,
+					 (struct lpfc_name *)tgt_wwpn, lun))
+			rc = -ENOMEM;
+	} else {
+		lpfc_disable_oas_lun(phba, (struct lpfc_name *)vpt_wwpn,
+				     (struct lpfc_name *)tgt_wwpn, lun);
+	}
+	return rc;
+
+}
+
+/**
+ * lpfc_oas_lun_get_next - get the next lun that has been enabled for Optimized
+ *			  Access Storage (OAS) operations.
+ * @phba: lpfc_hba pointer.
+ * @vpt_wwpn: wwpn of the vport associated with the returned lun
+ * @tgt_wwpn: wwpn of the target associated with the returned lun
+ * @lun_status: status of the lun returned lun
+ *
+ * Returns the first or next lun enabled for OAS operations for the vport/target
+ * specified.  If a lun is found, its vport wwpn, target wwpn and status is
+ * returned.  If the lun is not found, NOT_OAS_ENABLED_LUN is returned.
+ *
+ * Return:
+ * lun that is OAS enabled for the vport/target
+ * NOT_OAS_ENABLED_LUN when no oas enabled lun found.
+ */
+static uint64_t
+lpfc_oas_lun_get_next(struct lpfc_hba *phba, uint8_t vpt_wwpn[],
+		      uint8_t tgt_wwpn[], uint32_t *lun_status)
+{
+	uint64_t found_lun;
+
+	if (unlikely(!phba) || !vpt_wwpn || !tgt_wwpn)
+		return NOT_OAS_ENABLED_LUN;
+	if (lpfc_find_next_oas_lun(phba, (struct lpfc_name *)
+				   phba->sli4_hba.oas_next_vpt_wwpn,
+				   (struct lpfc_name *)
+				   phba->sli4_hba.oas_next_tgt_wwpn,
+				   &phba->sli4_hba.oas_next_lun,
+				   (struct lpfc_name *)vpt_wwpn,
+				   (struct lpfc_name *)tgt_wwpn,
+				   &found_lun, lun_status))
+		return found_lun;
+	else
+		return NOT_OAS_ENABLED_LUN;
+}
+
+/**
+ * lpfc_oas_lun_state_change - enable/disable a lun for OAS operations
+ * @phba: lpfc_hba pointer.
+ * @vpt_wwpn: vport wwpn by reference.
+ * @tgt_wwpn: target wwpn by reference.
+ * @lun: the fc lun for setting oas state.
+ * @oas_state: the oas state to be set to the oas_lun.
+ *
+ * This routine enables (OAS_LUN_ENABLE) or disables (OAS_LUN_DISABLE)
+ * a lun for OAS operations.
+ *
+ * Return:
+ * SUCCESS: 0
+ * -ENOMEM: failed to enable an lun for OAS operations
+ * -EPERM: OAS is not enabled
+ */
+static ssize_t
+lpfc_oas_lun_state_change(struct lpfc_hba *phba, uint8_t vpt_wwpn[],
+			  uint8_t tgt_wwpn[], uint64_t lun,
+			  uint32_t oas_state)
+{
+
+	int rc;
+
+	rc = lpfc_oas_lun_state_set(phba, vpt_wwpn, tgt_wwpn, lun,
+					oas_state);
+	return rc;
+}
+
+/**
+ * lpfc_oas_lun_show - Return oas enabled luns from a chosen target
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ *
+ * This routine returns a lun enabled for OAS each time the function
+ * is called.
+ *
+ * Returns:
+ * SUCCESS: size of formatted string.
+ * -EFAULT: target or vport wwpn was not set properly.
+ * -EPERM: oas is not enabled.
+ **/
+static ssize_t
+lpfc_oas_lun_show(struct device *dev, struct device_attribute *attr,
+		  char *buf)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+
+	uint64_t oas_lun;
+	int len = 0;
+
+	if (!phba->cfg_EnableXLane)
+		return -EPERM;
+
+	if (wwn_to_u64(phba->cfg_oas_vpt_wwpn) == 0)
+		if (!(phba->cfg_oas_flags & OAS_FIND_ANY_VPORT))
+			return -EFAULT;
+
+	if (wwn_to_u64(phba->cfg_oas_tgt_wwpn) == 0)
+		if (!(phba->cfg_oas_flags & OAS_FIND_ANY_TARGET))
+			return -EFAULT;
+
+	oas_lun = lpfc_oas_lun_get_next(phba, phba->cfg_oas_vpt_wwpn,
+					phba->cfg_oas_tgt_wwpn,
+					&phba->cfg_oas_lun_status);
+	if (oas_lun != NOT_OAS_ENABLED_LUN)
+		phba->cfg_oas_flags |= OAS_LUN_VALID;
+
+	len += snprintf(buf + len, PAGE_SIZE-len, "0x%llx", oas_lun);
+
+	return len;
+}
+
+/**
+ * lpfc_oas_lun_store - Sets the OAS state for lun
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: buffer for passing information.
+ *
+ * This function sets the OAS state for lun.  Before this function is called,
+ * the vport wwpn, target wwpn, and oas state need to be set.
+ *
+ * Returns:
+ * SUCCESS: size of formatted string.
+ * -EFAULT: target or vport wwpn was not set properly.
+ * -EPERM: oas is not enabled.
+ * size of formatted string.
+ **/
+static ssize_t
+lpfc_oas_lun_store(struct device *dev, struct device_attribute *attr,
+		   const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+	uint64_t scsi_lun;
+	ssize_t rc;
+
+	if (!phba->cfg_EnableXLane)
+		return -EPERM;
+
+	if (wwn_to_u64(phba->cfg_oas_vpt_wwpn) == 0)
+		return -EFAULT;
+
+	if (wwn_to_u64(phba->cfg_oas_tgt_wwpn) == 0)
+		return -EFAULT;
+
+	if (!isdigit(buf[0]))
+		return -EINVAL;
+
+	if (sscanf(buf, "0x%llx", &scsi_lun) != 1)
+		return -EINVAL;
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+			"3372 Try to set vport 0x%llx target 0x%llx lun:%lld "
+			"with oas set to %d\n",
+			wwn_to_u64(phba->cfg_oas_vpt_wwpn),
+			wwn_to_u64(phba->cfg_oas_tgt_wwpn), scsi_lun,
+			phba->cfg_oas_lun_state);
+
+	rc = lpfc_oas_lun_state_change(phba, phba->cfg_oas_vpt_wwpn,
+					   phba->cfg_oas_tgt_wwpn, scsi_lun,
+					   phba->cfg_oas_lun_state);
+
+	if (rc)
+		return rc;
+
+	return count;
+}
+static DEVICE_ATTR(lpfc_xlane_lun, S_IRUGO | S_IWUSR,
+		   lpfc_oas_lun_show, lpfc_oas_lun_store);
 
 static int lpfc_poll = 0;
 module_param(lpfc_poll, int, S_IRUGO);

@@ -4157,6 +4627,21 @@ LPFC_ATTR_R(enable_hba_reset, 1, 0, 1, "
 LPFC_ATTR_R(enable_hba_heartbeat, 0, 0, 1, "Enable HBA Heartbeat.");
 
 /*
+# lpfc_EnableXLane: Enable Express Lane Feature
+#      0x0   Express Lane Feature disabled
+#      0x1   Express Lane Feature enabled
+# Value range is [0,1]. Default value is 0.
+*/
+LPFC_ATTR_R(EnableXLane, 0, 0, 1, "Enable Express Lane Feature.");
+
+/*
+# lpfc_XLanePriority:  Define CS_CTL priority for Express Lane Feature
+#       0x0 - 0x7f  = CS_CTL field in FC header (high 7 bits)
+# Value range is [0x0,0x7f]. Default value is 0
+*/
+LPFC_ATTR_R(XLanePriority, 0, 0x0, 0x7f, "CS_CTL for Express Lane Feature.");
+
+/*
 # lpfc_enable_bg: Enable BlockGuard (Emulex's Implementation of T10-DIF)
 #       0  = BlockGuard disabled (default)
 #       1  = BlockGuard enabled

@@ -4317,6 +4802,13 @@ struct device_attribute *lpfc_hba_attrs[
 	&dev_attr_lpfc_soft_wwn_enable,
 	&dev_attr_lpfc_enable_hba_reset,
 	&dev_attr_lpfc_enable_hba_heartbeat,
+	&dev_attr_lpfc_EnableXLane,
+	&dev_attr_lpfc_XLanePriority,
+	&dev_attr_lpfc_xlane_lun,
+	&dev_attr_lpfc_xlane_tgt,
+	&dev_attr_lpfc_xlane_vpt,
+	&dev_attr_lpfc_xlane_lun_state,
+	&dev_attr_lpfc_xlane_lun_status,
 	&dev_attr_lpfc_sg_seg_cnt,
 	&dev_attr_lpfc_max_scsicmpl_time,
 	&dev_attr_lpfc_stat_data_ctrl,

@@ -4335,6 +4827,7 @@ struct device_attribute *lpfc_hba_attrs[
 	&dev_attr_lpfc_dss,
 	&dev_attr_lpfc_sriov_hw_max_virtfn,
 	&dev_attr_protocol,
+	&dev_attr_lpfc_xlane_supported,
 	NULL,
 };
 

@@ -5296,11 +5789,20 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
 	lpfc_fcp_io_channel_init(phba, lpfc_fcp_io_channel);
 	lpfc_enable_hba_reset_init(phba, lpfc_enable_hba_reset);
 	lpfc_enable_hba_heartbeat_init(phba, lpfc_enable_hba_heartbeat);
+	lpfc_EnableXLane_init(phba, lpfc_EnableXLane);
+	if (phba->sli_rev != LPFC_SLI_REV4)
+		phba->cfg_EnableXLane = 0;
+	lpfc_XLanePriority_init(phba, lpfc_XLanePriority);
+	memset(phba->cfg_oas_tgt_wwpn, 0, (8 * sizeof(uint8_t)));
+	memset(phba->cfg_oas_vpt_wwpn, 0, (8 * sizeof(uint8_t)));
+	phba->cfg_oas_lun_state = 0;
+	phba->cfg_oas_lun_status = 0;
+	phba->cfg_oas_flags = 0;
 	lpfc_enable_bg_init(phba, lpfc_enable_bg);
 	if (phba->sli_rev == LPFC_SLI_REV4)
 		phba->cfg_poll = 0;
 	else
-	phba->cfg_poll = lpfc_poll;
+		phba->cfg_poll = lpfc_poll;
 	phba->cfg_soft_wwnn = 0L;
 	phba->cfg_soft_wwpn = 0L;
 	lpfc_sg_seg_cnt_init(phba, lpfc_sg_seg_cnt);

diff -upNr a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -187,6 +187,11 @@ void lpfc_offline_prep(struct lpfc_hba *
 void lpfc_offline(struct lpfc_hba *);
 void lpfc_reset_hba(struct lpfc_hba *);
 
+int lpfc_fof_queue_create(struct lpfc_hba *);
+int lpfc_fof_queue_setup(struct lpfc_hba *);
+int lpfc_fof_queue_destroy(struct lpfc_hba *);
+irqreturn_t lpfc_sli4_fof_intr_handler(int, void *);
+
 int lpfc_sli_setup(struct lpfc_hba *);
 int lpfc_sli_queue_setup(struct lpfc_hba *);
 

@@ -472,3 +477,20 @@ void lpfc_free_sgl_list(struct lpfc_hba
 uint32_t lpfc_sli_port_speed_get(struct lpfc_hba *);
 int lpfc_sli4_request_firmware_update(struct lpfc_hba *, uint8_t);
 void lpfc_sli4_offline_eratt(struct lpfc_hba *);
+
+struct lpfc_device_data *lpfc_create_device_data(struct lpfc_hba *,
+						struct lpfc_name *,
+						struct lpfc_name *,
+						uint64_t, bool);
+void lpfc_delete_device_data(struct lpfc_hba *, struct lpfc_device_data*);
+struct lpfc_device_data *__lpfc_get_device_data(struct lpfc_hba *,
+					struct list_head *list,
+					struct lpfc_name *,
+					struct lpfc_name *, uint64_t);
+bool lpfc_enable_oas_lun(struct lpfc_hba *, struct lpfc_name *,
+			 struct lpfc_name *, uint64_t);
+bool lpfc_disable_oas_lun(struct lpfc_hba *, struct lpfc_name *,
+			  struct lpfc_name *, uint64_t);
+bool lpfc_find_next_oas_lun(struct lpfc_hba *, struct lpfc_name *,
+			    struct lpfc_name *, uint64_t *, struct lpfc_name *,
+			    struct lpfc_name *, uint64_t *, uint32_t *);

104 lines not on this page · raw message

diff -upNr a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
@@ -722,6 +722,20 @@ struct lpfc_hba {
 	uint32_t cfg_hba_queue_depth;
 	uint32_t cfg_enable_hba_reset;
 	uint32_t cfg_enable_hba_heartbeat;
+	uint32_t cfg_fof;
+	uint32_t cfg_EnableXLane;
+	uint8_t cfg_oas_tgt_wwpn[8];
+	uint8_t cfg_oas_vpt_wwpn[8];
+	uint32_t cfg_oas_lun_state;
+#define OAS_LUN_ENABLE	1
+#define OAS_LUN_DISABLE	0
+	uint32_t cfg_oas_lun_status;
+#define OAS_LUN_STATUS_EXISTS	0x01
+	uint32_t cfg_oas_flags;
+#define OAS_FIND_ANY_VPORT	0x01
+#define OAS_FIND_ANY_TARGET	0x02
+#define OAS_LUN_VALID	0x04
+	uint32_t cfg_XLanePriority;
 	uint32_t cfg_enable_bg;
 	uint32_t cfg_hostmem_hgp;
 	uint32_t cfg_log_verbose;

@@ -973,6 +987,9 @@ struct lpfc_hba {
 	atomic_t sdev_cnt;
 	uint8_t fips_spec_rev;
 	uint8_t fips_level;
+	spinlock_t devicelock;	/* lock for luns list */
+	mempool_t *device_data_mem_pool;
+	struct list_head luns;
 };
 
 static inline struct Scsi_Host *

diff -upNr a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -2616,6 +2616,9 @@ struct lpfc_sli4_parameters {
 #define cfg_phwq_SHIFT				15
 #define cfg_phwq_MASK				0x00000001
 #define cfg_phwq_WORD				word12
+#define cfg_oas_SHIFT				25
+#define cfg_oas_MASK				0x00000001
+#define cfg_oas_WORD				word12
 #define cfg_loopbk_scope_SHIFT			28
 #define cfg_loopbk_scope_MASK			0x0000000f
 #define cfg_loopbk_scope_WORD			word12

@@ -3322,6 +3325,9 @@ struct wqe_common {
 #define wqe_ebde_cnt_SHIFT    0
 #define wqe_ebde_cnt_MASK     0x0000000f
 #define wqe_ebde_cnt_WORD     word10
+#define wqe_oas_SHIFT         6
+#define wqe_oas_MASK          0x00000001
+#define wqe_oas_WORD          word10
 #define wqe_lenloc_SHIFT      7
 #define wqe_lenloc_MASK       0x00000003
 #define wqe_lenloc_WORD       word10

diff -upNr a/drivers/scsi/lpfc/lpfc_hw.h b/drivers/scsi/lpfc/lpfc_hw.h
@@ -45,6 +45,7 @@
 #define LPFC_EXTRA_RING          1	/* ring 1 for other protocols */
 #define LPFC_ELS_RING            2	/* ring 2 for ELS commands */
 #define LPFC_FCP_NEXT_RING       3
+#define LPFC_FCP_OAS_RING        3
 
 #define SLI2_IOCB_CMD_R0_ENTRIES    172	/* SLI-2 FCP command ring entries */
 #define SLI2_IOCB_RSP_R0_ENTRIES    134	/* SLI-2 FCP response ring entries */

369 lines not on this page · raw message

diff -upNr a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c
@@ -42,6 +42,7 @@
 
 #define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
 #define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
+#define LPFC_DEVICE_DATA_POOL_SIZE 64   /* max elements in device data pool */
 
 int
 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {

@@ -164,6 +165,16 @@ lpfc_mem_alloc(struct lpfc_hba *phba, in
 		phba->lpfc_drb_pool = NULL;
 	}
 
+	if (phba->cfg_EnableXLane) {
+		phba->device_data_mem_pool = mempool_create_kmalloc_pool(
+					LPFC_DEVICE_DATA_POOL_SIZE,
+					sizeof(struct lpfc_device_data));
+		if (!phba->device_data_mem_pool)
+			goto fail_free_hrb_pool;
+	} else {
+		phba->device_data_mem_pool = NULL;
+	}
+
 	return 0;
  fail_free_hrb_pool:
 	pci_pool_destroy(phba->lpfc_hrb_pool);

@@ -206,6 +217,7 @@ lpfc_mem_free(struct lpfc_hba *phba)
 {
 	int i;
 	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
+	struct lpfc_device_data *device_data;
 
 	/* Free HBQ pools */
 	lpfc_sli_hbqbuf_free_all(phba);

@@ -249,6 +261,19 @@ lpfc_mem_free(struct lpfc_hba *phba)
 	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 	phba->lpfc_scsi_dma_buf_pool = NULL;
 
+	/* Free Device Data memory pool */
+	if (phba->device_data_mem_pool) {
+		/* Ensure all objects have been returned to the pool */
+		while (!list_empty(&phba->luns)) {
+			device_data = list_first_entry(&phba->luns,
+						       struct lpfc_device_data,
+						       listentry);
+			list_del(&device_data->listentry);
+			mempool_free(device_data, phba->device_data_mem_pool);
+		}
+		mempool_destroy(phba->device_data_mem_pool);
+	}
+	phba->device_data_mem_pool = NULL;
 	return;
 }
 

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diff -upNr a/drivers/scsi/lpfc/lpfc_scsi.h b/drivers/scsi/lpfc/lpfc_scsi.h
@@ -41,6 +41,20 @@ struct lpfc_rport_data {
 	struct lpfc_nodelist *pnode;	/* Pointer to the node structure. */
 };
 
+struct lpfc_device_id {
+	struct lpfc_name vport_wwpn;
+	struct lpfc_name target_wwpn;
+	uint64_t lun;
+};
+
+struct lpfc_device_data {
+	struct list_head listentry;
+	struct lpfc_rport_data *rport_data;
+	struct lpfc_device_id device_id;
+	bool oas_enabled;
+	bool available;
+};
+
 struct fcp_rsp {
 	uint32_t rspRsvd1;	/* FC Word 0, byte 0:3 */
 	uint32_t rspRsvd2;	/* FC Word 1, byte 0:3 */

@@ -166,3 +180,7 @@ struct lpfc_scsi_buf {
 #define LPFC_SCSI_DMA_EXT_SIZE 264
 #define LPFC_BPL_SIZE          1024
 #define MDAC_DIRECT_CMD                  0x22
+
+#define FIND_FIRST_OAS_LUN		 0
+#define NO_MORE_OAS_LUN			-1
+#define NOT_OAS_ENABLED_LUN		NO_MORE_OAS_LUN

diff -upNr a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -39,6 +39,10 @@
 #define LPFC_FCP_IO_CHAN_MIN       1
 #define LPFC_FCP_IO_CHAN_MAX       16
 
+/* Number of channels used for Flash Optimized Fabric (FOF) operations */
+
+#define LPFC_FOF_IO_CHAN_NUM       1
+
 /*
  * Provide the default FCF Record attributes used by the driver
  * when nonFIP mode is configured and there is no other default

@@ -399,6 +403,7 @@ struct lpfc_pc_sli4_params {
 	uint32_t if_page_sz;
 	uint32_t rq_db_window;
 	uint32_t loopbk_scope;
+	uint32_t oas_supported;
 	uint32_t eq_pages_max;
 	uint32_t eqe_size;
 	uint32_t cq_pages_max;

@@ -439,6 +444,8 @@ struct lpfc_sli4_lnk_info {
 	uint8_t lnk_no;
 };
 
+#define LPFC_SLI4_HANDLER_CNT		(LPFC_FCP_IO_CHAN_MAX+ \
+					 LPFC_FOF_IO_CHAN_NUM)
 #define LPFC_SLI4_HANDLER_NAME_SZ	16
 
 /* Used for IRQ vector to CPU mapping */

@@ -507,7 +514,7 @@ struct lpfc_sli4_hba {
 	struct lpfc_register sli_intf;
 	struct lpfc_pc_sli4_params pc_sli4_params;
 	struct msix_entry *msix_entries;
-	uint8_t handler_name[LPFC_FCP_IO_CHAN_MAX][LPFC_SLI4_HANDLER_NAME_SZ];
+	uint8_t handler_name[LPFC_SLI4_HANDLER_CNT][LPFC_SLI4_HANDLER_NAME_SZ];
 	struct lpfc_fcp_eq_hdl *fcp_eq_hdl; /* FCP per-WQ handle */
 
 	/* Pointers to the constructed SLI4 queues */

@@ -527,6 +534,17 @@ struct lpfc_sli4_hba {
 	uint32_t ulp0_mode;	/* ULP0 protocol mode */
 	uint32_t ulp1_mode;	/* ULP1 protocol mode */
 
+	struct lpfc_queue *fof_eq; /* Flash Optimized Fabric Event queue */
+
+	/* Optimized Access Storage specific queues/structures */
+
+	struct lpfc_queue *oas_cq; /* OAS completion queue */
+	struct lpfc_queue *oas_wq; /* OAS Work queue */
+	struct lpfc_sli_ring *oas_ring;
+	uint64_t oas_next_lun;
+	uint8_t oas_next_tgt_wwpn[8];
+	uint8_t oas_next_vpt_wwpn[8];
+
 	/* Setup information for various queue parameters */
 	int eq_esize;
 	int eq_ecount;

301 lines not on this page · raw message

diff -upNr a/drivers/scsi/lpfc/lpfc_sli.h b/drivers/scsi/lpfc/lpfc_sli.h
@@ -78,6 +78,8 @@ struct lpfc_iocbq {
 #define LPFC_FIP_ELS_ID_MASK	0xc000	/* ELS_ID range 0-3, non-shifted mask */
 #define LPFC_FIP_ELS_ID_SHIFT	14
 
+#define LPFC_IO_OAS		0x10000 /* OAS FCP IO */
+
 	uint32_t drvrTimeout;	/* driver timeout in seconds */
 	uint32_t fcp_wqidx;	/* index to FCP work queue */
 	struct lpfc_vport *vport;/* virtual port pointer */