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* [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic
@ 2021-06-08  4:35 Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 01/13] cgroup: Added cgroup_get_from_id Muneendra Kumar
                   ` (12 more replies)
  0 siblings, 13 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Muneendra

From: Muneendra <muneendra.kumar@broadcom.com>

This Patch added a unique application identifier i.e
app_id  knob to  blkcg which allows identification of traffic
sources at an individual cgroup based Applications
(ex:virtual machine (VM))level in both host and
fabric infrastructure.

Added a new sysfs attribute appid_store to set the application identfier
in  the blkcg associted with cgroup id under
/sys/class/fc/fc_udev_device/*

With this new interface the user can set the application identfier
in  the blkcg associted with cgroup id.

This capability can be utilized by multiple block transport infrastructure
like fc,iscsi,roce.

Existing FC fabric will use this feature and the description of
the use case is below.

Various virtualization technologies used in Fibre Channel
SAN deployments have created the opportunity to identify
and associate traffic with specific virtualized applications.
The concepts behind the T11 Application Services standard is
to provide the general mechanisms needed to identify
virtualized services.
It enables the Fabric and the storage targets to
identify, monitor, and handle FC traffic
based on vm tags by inserting application specific identification
into the FC frame.

The patches were cut against  5.14/scsi-queue tree

v11:
add Tejun Heo Acks.
Add comment on race condition

v10:
Fixed the spelling mistakes and function name corrections
Removed the redundant code

v9:
Addressed the issues reported by kernel test robot
Replaced lpfc_get_vmid_from_hashtable with the
generic kernel based hashtable (include/linux/hashtable.h)
and made the changes in the code accordingly.
Addressed the locking issue and also merged few patches

v8:
Modified the structure member,log messages and function declarations
Added proper error codes and return values

v7:
Modified the Kconfig comments

v6:
Addressed the issues reported by kernel test robot
Modified the Kconfig files as per standard

v5:
Renamed the function cgroup_get_from_kernfs_id to
cgroup_get_from_id.

Moved the input validation at the beginning of the function in 
Renamed the arguments appropriatley.

Changed Return code to non-numeric/SymbolChanged Return code
to non-numeric/Symbol

Modified the comments.

v4:
Addressed the error reported by  kernel test robot

v3:
removed RFC.

Renamed the functions and app_id to more specific
Addressed the reference leaks in blkcg_set_app_identifier
Added a new config BLK_CGROUP_FC_APPID and made changes to 
select the same under SCSI_FC_ATTRS

V2:
renamed app_identifier to app_id.
removed the  sysfs interface blkio.app_identifie under
/sys/fs/cgroup/blkio
Ported the patch on top of 5.10/scsi-queue.
Removed redundant code due to changes since last submit.
Added a fix for issuing QFPA command.



Gaurav Srivastava (10):
  lpfc: vmid: Add the datastructure for supporting VMID in lpfc
  lpfc: vmid: VMID params initialization
  lpfc: vmid: Add support for vmid in mailbox command, does vmid
    resource allocation and vmid cleanup
  lpfc: vmid: Implements ELS commands for appid patch
  lpfc: vmid: Functions to manage vmids
  lpfc: vmid: Implements CT commands for appid.
  lpfc: vmid: Appends the vmid in the wqe before sending
  lpfc: vmid: Timeout implementation for vmid
  lpfc: vmid: Adding qfpa and vmid timeout check in worker thread
  lpfc: vmid: Introducing vmid in io path.

Muneendra (3):
  cgroup: Added cgroup_get_from_id
  blkcg: Added a app identifier support for blkcg
  nvme: Added a newsysfs attribute appid_store

 block/Kconfig                    |   9 +
 drivers/nvme/host/fc.c           |  73 +++++-
 drivers/scsi/Kconfig             |  13 ++
 drivers/scsi/lpfc/lpfc.h         | 122 +++++++++++
 drivers/scsi/lpfc/lpfc_attr.c    |  48 ++++
 drivers/scsi/lpfc/lpfc_crtn.h    |  11 +
 drivers/scsi/lpfc/lpfc_ct.c      | 255 +++++++++++++++++++++
 drivers/scsi/lpfc/lpfc_disc.h    |   1 +
 drivers/scsi/lpfc/lpfc_els.c     | 366 ++++++++++++++++++++++++++++++-
 drivers/scsi/lpfc/lpfc_hbadisc.c | 148 +++++++++++++
 drivers/scsi/lpfc/lpfc_hw.h      | 124 ++++++++++-
 drivers/scsi/lpfc/lpfc_hw4.h     |  12 +
 drivers/scsi/lpfc/lpfc_init.c    | 104 +++++++++
 drivers/scsi/lpfc/lpfc_mbox.c    |   6 +
 drivers/scsi/lpfc/lpfc_scsi.c    | 321 +++++++++++++++++++++++++++
 drivers/scsi/lpfc/lpfc_sli.c     |  23 ++
 drivers/scsi/lpfc/lpfc_sli.h     |   8 +
 include/linux/blk-cgroup.h       |  64 ++++++
 include/linux/cgroup.h           |   6 +
 kernel/cgroup/cgroup.c           |  26 +++
 20 files changed, 1731 insertions(+), 9 deletions(-)

-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 01/13] cgroup: Added cgroup_get_from_id
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 02/13] blkcg: Added a app identifier support for blkcg Muneendra Kumar
                   ` (11 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Muneendra, Himanshu Madhani

From: Muneendra <muneendra.kumar@broadcom.com>

Added a new function cgroup_get_from_id  to retrieve the cgroup
associated with cgroup id.
Exported the same as this can be used by blk-cgorup.c

Added function declaration of cgroup_get_from_id in cgorup.h

This patch also exported the function cgroup_get_e_css
as this is getting used in blk-cgroup.h

Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra <muneendra.kumar@broadcom.com>

---
v11:
No change

v10:
No change

v9:
Addressed the issues reported by kernel test robot

v8:
No change

v7:
No change

v6:
No change

v5:
renamed the function cgroup_get_from_kernfs_id to
cgroup_get_from_id

v4:
No change

v3:
Exported the cgroup_get_e_css

v2:
New patch
---
 include/linux/cgroup.h |  6 ++++++
 kernel/cgroup/cgroup.c | 26 ++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 4f2f79de083e..d2eace88d9d1 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -696,6 +696,7 @@ static inline void cgroup_kthread_ready(void)
 }
 
 void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen);
+struct cgroup *cgroup_get_from_id(u64 id);
 #else /* !CONFIG_CGROUPS */
 
 struct cgroup_subsys_state;
@@ -743,6 +744,11 @@ static inline bool task_under_cgroup_hierarchy(struct task_struct *task,
 
 static inline void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen)
 {}
+
+static inline struct cgroup *cgroup_get_from_id(u64 id)
+{
+	return NULL;
+}
 #endif /* !CONFIG_CGROUPS */
 
 #ifdef CONFIG_CGROUPS
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index e049edd66776..bd3251d4fcc7 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -577,6 +577,7 @@ struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgrp,
 	rcu_read_unlock();
 	return css;
 }
+EXPORT_SYMBOL_GPL(cgroup_get_e_css);
 
 static void cgroup_get_live(struct cgroup *cgrp)
 {
@@ -5776,6 +5777,31 @@ void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen)
 	kernfs_put(kn);
 }
 
+/*
+ * cgroup_get_from_id : get the cgroup associated with cgroup id
+ * @id: cgroup id
+ * On success it returns the cgrp on failure it returns NULL
+ */
+struct cgroup *cgroup_get_from_id(u64 id)
+{
+	struct kernfs_node *kn;
+	struct cgroup *cgrp = NULL;
+
+	mutex_lock(&cgroup_mutex);
+	kn = kernfs_find_and_get_node_by_id(cgrp_dfl_root.kf_root, id);
+	if (!kn)
+		goto out_unlock;
+
+	cgrp = kn->priv;
+	if (cgroup_is_dead(cgrp) || !cgroup_tryget(cgrp))
+		cgrp = NULL;
+	kernfs_put(kn);
+out_unlock:
+	mutex_unlock(&cgroup_mutex);
+	return cgrp;
+}
+EXPORT_SYMBOL_GPL(cgroup_get_from_id);
+
 /*
  * proc_cgroup_show()
  *  - Print task's cgroup paths into seq_file, one line for each hierarchy
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 02/13] blkcg: Added a app identifier support for blkcg
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 01/13] cgroup: Added cgroup_get_from_id Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 03/13] nvme: Added a newsysfs attribute appid_store Muneendra Kumar
                   ` (10 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Muneendra, Himanshu Madhani

From: Muneendra <muneendra.kumar@broadcom.com>

This Patch added a unique application identifier i.e
fc_app_id  member in blkcg which allows identification of traffic
sources at an individual cgroup based Applications
(ex:virtual machine (VM))level in both host and
fabric infrastructure.

Added a new function blkcg_get_fc_appid to
grab the app identifier associated with a bio.

Added a new function blkcg_set_fc_appid to
set the app identifier in a blkcgrp associated with cgroup id

Added a new config BLK_CGROUP_FC_APPID and moved the changes
under this config

Merged the patch 16 of previous version in which we
added a new config FC_APPID to select BLK_CGROUP_FC_APPID which Enable
support to track FC io Traffic.

Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra <muneendra.kumar@broadcom.com>

---
v11:
Added a comment on race condition

v10:
No change

v9:
Merged patch16 of previosu version to this patch
where we are using Kconfig settings

v8:
No change

v7:
Modified the Kconfig file

v6:
Modified the Kconfig file as per standard specified
in Documentation/process/coding-style.rst

v5:
Renamed the arguments appropriatley
Renamed APPID_LEN  to FC_APPID_LEN
Moved the input validation at the begining of the function
Modified the comments

v4:
No change

v3:
Renamed the functions and app_id to more specific

Addressed the reference leaks in blkcg_set_app_identifier

Added a new config BLK_CGROUP_FC_APPID and moved the changes
under this config

Added blkcg_get_fc_appid,blkcg_set_fc_appid as inline functions

v2:
renamed app_identifier to app_id
removed the  sysfs interface blkio.app_identifie under
---
 block/Kconfig              |  9 ++++++
 drivers/scsi/Kconfig       | 13 ++++++++
 include/linux/blk-cgroup.h | 64 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 86 insertions(+)

diff --git a/block/Kconfig b/block/Kconfig
index a2297edfdde8..03886d105301 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -144,6 +144,15 @@ config BLK_CGROUP_IOLATENCY
 
 	Note, this is an experimental interface and could be changed someday.
 
+config BLK_CGROUP_FC_APPID
+	bool "Enable support to track FC I/O Traffic across cgroup applications"
+	depends on BLK_CGROUP=y
+	help
+	  Enabling this option enables the support to track FC I/O traffic across
+	  cgroup applications. It enables the Fabric and the storage targets to
+	  identify, monitor, and handle FC traffic based on VM tags by inserting
+	  application specific identification into the FC frame.
+
 config BLK_CGROUP_IOCOST
 	bool "Enable support for cost model based cgroup IO controller"
 	depends on BLK_CGROUP=y
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 23e015af0e93..cd5fbd9d46ba 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -235,6 +235,19 @@ config SCSI_FC_ATTRS
 	  each attached FiberChannel device to sysfs, say Y.
 	  Otherwise, say N.
 
+config FC_APPID
+	bool "Enable support to track FC I/O Traffic"
+	depends on BLOCK && BLK_CGROUP
+	depends on SCSI
+	select BLK_CGROUP_FC_APPID
+	default y
+	help
+	  If you say Y here, it enables the support to track
+	  FC I/O traffic over fabric. It enables the Fabric and the
+	  storage targets to identify, monitor, and handle FC traffic
+	  based on VM tags by inserting application specific
+	  identification into the FC frame.
+
 config SCSI_ISCSI_ATTRS
 	tristate "iSCSI Transport Attributes"
 	depends on SCSI && NET
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index b9f3c246c3c9..aaf9ef174302 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -30,6 +30,8 @@
 
 /* Max limits for throttle policy */
 #define THROTL_IOPS_MAX		UINT_MAX
+#define FC_APPID_LEN              129
+
 
 #ifdef CONFIG_BLK_CGROUP
 
@@ -55,6 +57,9 @@ struct blkcg {
 	struct blkcg_policy_data	*cpd[BLKCG_MAX_POLS];
 
 	struct list_head		all_blkcgs_node;
+#ifdef CONFIG_BLK_CGROUP_FC_APPID
+	char                            fc_app_id[FC_APPID_LEN];
+#endif
 #ifdef CONFIG_CGROUP_WRITEBACK
 	struct list_head		cgwb_list;
 #endif
@@ -660,4 +665,63 @@ static inline void blk_cgroup_bio_start(struct bio *bio) { }
 
 #endif	/* CONFIG_BLOCK */
 #endif	/* CONFIG_BLK_CGROUP */
+
+#ifdef CONFIG_BLK_CGROUP_FC_APPID
+/*
+ * Sets the fc_app_id field associted to blkcg
+ * @app_id: application identifier
+ * @cgrp_id: cgroup id
+ * @app_id_len: size of application identifier
+ */
+static inline int blkcg_set_fc_appid(char *app_id, u64 cgrp_id, size_t app_id_len)
+{
+	struct cgroup *cgrp;
+	struct cgroup_subsys_state *css;
+	struct blkcg *blkcg;
+	int ret  = 0;
+
+	if (app_id_len > FC_APPID_LEN)
+		return -EINVAL;
+
+	cgrp = cgroup_get_from_id(cgrp_id);
+	if (!cgrp)
+		return -ENOENT;
+	css = cgroup_get_e_css(cgrp, &io_cgrp_subsys);
+	if (!css) {
+		ret = -ENOENT;
+		goto out_cgrp_put;
+	}
+	blkcg = css_to_blkcg(css);
+	/*
+	 * There is a slight race condition on the setting of the appid,
+	 * which should not be an issue. At worst an io may not find the
+	 * appid, but it will be picked up in subsequent io.
+	 * This is no different from the io we let pass while obtaining
+	 * the vmid from the fabric.
+	 * Adding the overhead of a lock is not necessary.
+	 */
+	strlcpy(blkcg->fc_app_id, app_id, app_id_len);
+	css_put(css);
+out_cgrp_put:
+	cgroup_put(cgrp);
+	return ret;
+}
+
+/**
+ * blkcg_get_fc_appid - get the fc app identifier associated with a bio
+ * @bio: target bio
+ *
+ * On success it returns the fc_app_id on failure it returns NULL
+ */
+static inline char *blkcg_get_fc_appid(struct bio *bio)
+{
+	if (bio && bio->bi_blkg &&
+		(bio->bi_blkg->blkcg->fc_app_id[0] != '\0'))
+		return bio->bi_blkg->blkcg->fc_app_id;
+	return NULL;
+}
+#else
+static inline int blkcg_set_fc_appid(char *buf, u64 id, size_t len) { return -EINVAL; }
+static inline char *blkcg_get_fc_appid(struct bio *bio) { return NULL; }
+#endif /*CONFIG_BLK_CGROUP_FC_APPID*/
 #endif	/* _BLK_CGROUP_H */
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 03/13] nvme: Added a newsysfs attribute appid_store
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 01/13] cgroup: Added cgroup_get_from_id Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 02/13] blkcg: Added a app identifier support for blkcg Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 04/13] lpfc: vmid: Add the datastructure for supporting VMID in lpfc Muneendra Kumar
                   ` (9 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Muneendra, Himanshu Madhani

From: Muneendra <muneendra.kumar@broadcom.com>

Added a new sysfs attribute appid_store under
/sys/class/fc/fc_udev_device/*

With this new interface the user can set the application identfier
in  the blkcg associted with cgroup id.

Once the application identifer has set with this interface it allows
identification of traffic sources at an individual cgroup based
Applications (ex:virtual machine (VM))level in both host and
fabric infrastructure(FC).

Below is the interface provided to set the app_id

echo "<cgroupid>:<appid>" >> /sys/class/fc/fc_udev_device/appid_store
echo "457E:100000109b521d27" >> /sys/class/fc/fc_udev_device/appid_store

Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Muneendra <muneendra.kumar@broadcom.com>

---
v11:
No change

v10:
No change

v9:
No change

v8:
No change

v7:
No change

v6:
No change

v5:
Replaced APPID_LEN with FC_APPID_LEN

v4:
No change

v3:
Replaced blkcg_set_app_identifier function with blkcg_set_fc_appid

v2:
New Patch
---
 drivers/nvme/host/fc.c | 73 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 72 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index d9ab9e7871d0..57baddfe208b 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -9,7 +9,7 @@
 #include <uapi/scsi/fc/fc_els.h>
 #include <linux/delay.h>
 #include <linux/overflow.h>
-
+#include <linux/blk-cgroup.h>
 #include "nvme.h"
 #include "fabrics.h"
 #include <linux/nvme-fc-driver.h>
@@ -3787,10 +3787,81 @@ static ssize_t nvme_fc_nvme_discovery_store(struct device *dev,
 
 	return count;
 }
+
+/*parse the Cgroup id from a buf and returns the length of cgrpid*/
+static int fc_parse_cgrpid(const char *buf, u64 *id)
+{
+	char cgrp_id[16+1];
+	int cgrpid_len, j;
+
+	memset(cgrp_id, 0x0, sizeof(cgrp_id));
+	for (cgrpid_len = 0, j = 0; cgrpid_len < 17; cgrpid_len++) {
+		if (buf[cgrpid_len] != ':')
+			cgrp_id[cgrpid_len] = buf[cgrpid_len];
+		else {
+			j = 1;
+			break;
+		}
+	}
+	if (!j)
+		return -EINVAL;
+	if (kstrtou64(cgrp_id, 16, id) < 0)
+		return -EINVAL;
+	return cgrpid_len;
+}
+
+/*
+ * fc_update_appid :parses and updates the appid in the blkcg associated with
+ * cgroupid.
+ * @buf: buf contains both cgrpid and appid info
+ * @count: size of the buffer
+ */
+static int fc_update_appid(const char *buf, size_t count)
+{
+	u64 cgrp_id;
+	int appid_len = 0;
+	int cgrpid_len = 0;
+	char app_id[FC_APPID_LEN];
+	int ret = 0;
+
+	if (buf[count-1] == '\n')
+		count--;
+
+	if ((count > (16+1+FC_APPID_LEN)) || (!strchr(buf, ':')))
+		return -EINVAL;
+
+	cgrpid_len = fc_parse_cgrpid(buf, &cgrp_id);
+	if (cgrpid_len < 0)
+		return -EINVAL;
+	/*appid len is count - cgrpid_len -1 (: + \n) */
+	appid_len = count - cgrpid_len - 1;
+	if (appid_len > FC_APPID_LEN)
+		return -EINVAL;
+
+	memset(app_id, 0x0, sizeof(app_id));
+	memcpy(app_id, &buf[cgrpid_len+1], appid_len);
+	ret = blkcg_set_fc_appid(app_id, cgrp_id, sizeof(app_id));
+	if (ret < 0)
+		return ret;
+	return count;
+}
+
+static ssize_t fc_appid_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	int ret  = 0;
+
+	ret = fc_update_appid(buf, count);
+	if (ret < 0)
+		return -EINVAL;
+	return count;
+}
 static DEVICE_ATTR(nvme_discovery, 0200, NULL, nvme_fc_nvme_discovery_store);
+static DEVICE_ATTR(appid_store, 0200, NULL, fc_appid_store);
 
 static struct attribute *nvme_fc_attrs[] = {
 	&dev_attr_nvme_discovery.attr,
+	&dev_attr_appid_store.attr,
 	NULL
 };
 
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 04/13] lpfc: vmid: Add the datastructure for supporting VMID in lpfc
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (2 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 03/13] nvme: Added a newsysfs attribute appid_store Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 05/13] lpfc: vmid: VMID params initialization Muneendra Kumar
                   ` (8 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch adds the primary datastructures needed to implement
VMID in lpfc driver. It maintains the capability, current state,
hash table for the vmid/appid along with other information.
The implementation supports the two versions of vmid implementation
(app header and priority tagging)

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
Function name correction

v9:
Updated the data structures
Merged patch 5 and 6 of previous version v8 to this patch

v8:
modify structure member to uniform data type naming scheme

v7:
No change

v6:
No change

v5:
No Change

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
Removed unused variable.
---
 drivers/scsi/lpfc/lpfc.h      | 122 +++++++++++++++++++++++++++++++++
 drivers/scsi/lpfc/lpfc_crtn.h |  11 +++
 drivers/scsi/lpfc/lpfc_disc.h |   1 +
 drivers/scsi/lpfc/lpfc_hw.h   | 124 ++++++++++++++++++++++++++++++++--
 drivers/scsi/lpfc/lpfc_sli.h  |   8 +++
 5 files changed, 262 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index eb4472951cc6..4eb3a09928ab 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -304,6 +304,64 @@ struct lpfc_stats {
 struct lpfc_hba;
 
 
+#define LPFC_VMID_TIMER   300	/* timer interval in seconds. */
+
+#define LPFC_MAX_VMID_SIZE      256
+#define LPFC_COMPRESS_VMID_SIZE 16
+
+union lpfc_vmid_io_tag {
+	u32 app_id;	/* App Id vmid */
+	u8 cs_ctl_vmid;	/* Priority tag vmid */
+};
+
+#define JIFFIES_PER_HR	(HZ * 60 * 60)
+
+struct lpfc_vmid {
+	u8 flag;
+#define LPFC_VMID_SLOT_FREE     0x0
+#define LPFC_VMID_SLOT_USED     0x1
+#define LPFC_VMID_REQ_REGISTER  0x2
+#define LPFC_VMID_REGISTERED    0x4
+#define LPFC_VMID_DE_REGISTER   0x8
+	char host_vmid[LPFC_MAX_VMID_SIZE];
+	union lpfc_vmid_io_tag un;
+	struct hlist_node hnode;
+	u64 io_rd_cnt;
+	u64 io_wr_cnt;
+	u8 vmid_len;
+	u8 delete_inactive; /* Delete if inactive flag 0 = no, 1 = yes */
+	u32 hash_index;
+	u64 __percpu *last_io_time;
+};
+
+#define lpfc_vmid_is_type_priority_tag(vport)\
+	(vport->vmid_priority_tagging ? 1 : 0)
+
+#define LPFC_VMID_HASH_SIZE     256
+#define LPFC_VMID_HASH_MASK     255
+#define LPFC_VMID_HASH_SHIFT    6
+
+struct lpfc_vmid_context {
+	struct lpfc_vmid *vmp;
+	struct lpfc_nodelist *nlp;
+	bool instantiated;
+};
+
+struct lpfc_vmid_priority_range {
+	u8 low;
+	u8 high;
+	u8 qos;
+};
+
+struct lpfc_vmid_priority_info {
+	u32 num_descriptors;
+	struct lpfc_vmid_priority_range *vmid_range;
+};
+
+#define QFPA_EVEN_ONLY 0x01
+#define QFPA_ODD_ONLY  0x02
+#define QFPA_EVEN_ODD  0x03
+
 enum discovery_state {
 	LPFC_VPORT_UNKNOWN     =  0,    /* vport state is unknown */
 	LPFC_VPORT_FAILED      =  1,    /* vport has failed */
@@ -443,6 +501,9 @@ struct lpfc_vport {
 #define WORKER_RAMP_DOWN_QUEUE         0x800	/* hba: Decrease Q depth */
 #define WORKER_RAMP_UP_QUEUE           0x1000	/* hba: Increase Q depth */
 #define WORKER_SERVICE_TXQ             0x2000	/* hba: IOCBs on the txq */
+#define WORKER_CHECK_INACTIVE_VMID     0x4000	/* hba: check inactive vmids */
+#define WORKER_CHECK_VMID_ISSUE_QFPA   0x8000	/* vport: Check if qfpa need */
+						/* to issue */
 
 	struct timer_list els_tmofunc;
 	struct timer_list delayed_disc_tmo;
@@ -453,6 +514,8 @@ struct lpfc_vport {
 #define FC_LOADING		0x1	/* HBA in process of loading drvr */
 #define FC_UNLOADING		0x2	/* HBA in process of unloading drvr */
 #define FC_ALLOW_FDMI		0x4	/* port is ready for FDMI requests */
+#define FC_ALLOW_VMID		0x8	/* Allow VMID IO's */
+#define FC_DEREGISTER_ALL_APP_ID	0x10	/* Deregister all vmid's */
 	/* Vport Config Parameters */
 	uint32_t cfg_scan_down;
 	uint32_t cfg_lun_queue_depth;
@@ -471,9 +534,36 @@ struct lpfc_vport {
 	uint32_t cfg_tgt_queue_depth;
 	uint32_t cfg_first_burst_size;
 	uint32_t dev_loss_tmo_changed;
+	/* VMID parameters */
+	u8 lpfc_vmid_host_uuid[LPFC_COMPRESS_VMID_SIZE];
+	u32 max_vmid;	/* maximum VMIDs allowed per port */
+	u32 cur_vmid_cnt;	/* Current VMID count */
+#define LPFC_MIN_VMID	4
+#define LPFC_MAX_VMID	255
+	u32 vmid_inactivity_timeout;	/* Time after which the VMID */
+						/* deregisters from switch */
+	u32 vmid_priority_tagging;
+#define LPFC_VMID_PRIO_TAG_DISABLE	0 /* Disable */
+#define LPFC_VMID_PRIO_TAG_SUP_TARGETS	1 /* Allow supported targets only */
+#define LPFC_VMID_PRIO_TAG_ALL_TARGETS	2 /* Allow all targets */
+	unsigned long *vmid_priority_range;
+#define LPFC_VMID_MAX_PRIORITY_RANGE    256
+#define LPFC_VMID_PRIORITY_BITMAP_SIZE  32
+	u8 vmid_flag;
+#define LPFC_VMID_IN_USE		0x1
+#define LPFC_VMID_ISSUE_QFPA		0x2
+#define LPFC_VMID_QFPA_CMPL		0x4
+#define LPFC_VMID_QOS_ENABLED		0x8
+#define LPFC_VMID_TIMER_ENBLD		0x10
+	struct fc_qfpa_res *qfpa_res;
 
 	struct fc_vport *fc_vport;
 
+	struct lpfc_vmid *vmid;
+	DECLARE_HASHTABLE(hash_table, 8);
+	rwlock_t vmid_lock;
+	struct lpfc_vmid_priority_info vmid_priority;
+
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	struct dentry *debug_disc_trc;
 	struct dentry *debug_nodelist;
@@ -940,6 +1030,13 @@ struct lpfc_hba {
 	struct nvmet_fc_target_port *targetport;
 	lpfc_vpd_t vpd;		/* vital product data */
 
+	u32 cfg_max_vmid;	/* maximum VMIDs allowed per port */
+	u32 cfg_vmid_app_header;
+#define LPFC_VMID_APP_HEADER_DISABLE	0
+#define LPFC_VMID_APP_HEADER_ENABLE	1
+	u32 cfg_vmid_priority_tagging;
+	u32 cfg_vmid_inactivity_timeout;	/* Time after which the VMID */
+						/*  deregisters from switch */
 	struct pci_dev *pcidev;
 	struct list_head      work_list;
 	uint32_t              work_ha;      /* Host Attention Bits for WT */
@@ -1180,6 +1277,7 @@ struct lpfc_hba {
 	struct list_head ct_ev_waiters;
 	struct unsol_rcv_ct_ctx ct_ctx[LPFC_CT_CTX_MAX];
 	uint32_t ctx_idx;
+	struct timer_list inactive_vmid_poll;
 
 	/* RAS Support */
 	struct lpfc_ras_fwlog ras_fwlog;
@@ -1421,3 +1519,27 @@ static const char *routine(enum enum_name table_key)			\
 	}								\
 	return name;							\
 }
+
+/**
+ * lpfc_is_vmid_enabled - returns if VMID is enabled for either switch types
+ * @phba: Pointer to HBA context object.
+ *
+ * Relationship between the enable, target support and if vmid tag is required
+ * for the particular combination
+ * ---------------------------------------------------
+ * Switch    Enable Flag  Target Support  VMID Needed
+ * ---------------------------------------------------
+ * App Id     0              NA              N
+ * App Id     1               0              N
+ * App Id     1               1              Y
+ * Pr Tag     0              NA              N
+ * Pr Tag     1               0              N
+ * Pr Tag     1               1              Y
+ * Pr Tag     2               *              Y
+ ---------------------------------------------------
+ *
+ **/
+static inline int lpfc_is_vmid_enabled(struct lpfc_hba *phba)
+{
+	return phba->cfg_vmid_app_header || phba->cfg_vmid_priority_tagging;
+}
diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index 8f56e8f66311..737483c3f01d 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -608,3 +608,14 @@ extern unsigned long lpfc_no_hba_reset[];
 extern union lpfc_wqe128 lpfc_iread_cmd_template;
 extern union lpfc_wqe128 lpfc_iwrite_cmd_template;
 extern union lpfc_wqe128 lpfc_icmnd_cmd_template;
+
+/* vmid interface */
+int lpfc_vmid_uvem(struct lpfc_vport *vport, struct lpfc_vmid *vmid, bool ins);
+uint32_t lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport);
+int lpfc_vmid_cmd(struct lpfc_vport *vport,
+		  int cmdcode, struct lpfc_vmid *vmid);
+int lpfc_vmid_hash_fn(const char *vmid, int len);
+struct lpfc_vmid *lpfc_get_vmid_from_hashtable(struct lpfc_vport *vport,
+					      uint32_t hash, uint8_t *buf);
+void lpfc_vmid_vport_cleanup(struct lpfc_vport *vport);
+int lpfc_issue_els_qfpa(struct lpfc_vport *vport);
diff --git a/drivers/scsi/lpfc/lpfc_disc.h b/drivers/scsi/lpfc/lpfc_disc.h
index 27d1a971a7f8..131374a61d7e 100644
--- a/drivers/scsi/lpfc/lpfc_disc.h
+++ b/drivers/scsi/lpfc/lpfc_disc.h
@@ -125,6 +125,7 @@ struct lpfc_nodelist {
 	uint8_t         nlp_fcp_info;	        /* class info, bits 0-3 */
 #define NLP_FCP_2_DEVICE   0x10			/* FCP-2 device */
 	u8		nlp_nvme_info;	        /* NVME NSLER Support */
+	uint8_t		vmid_support;		/* destination VMID support */
 #define NLP_NVME_NSLER     0x1			/* NVME NSLER device */
 
 	struct timer_list   nlp_delayfunc;	/* Used for delayed ELS cmds */
diff --git a/drivers/scsi/lpfc/lpfc_hw.h b/drivers/scsi/lpfc/lpfc_hw.h
index 42682d95af52..4a5a85ed42ec 100644
--- a/drivers/scsi/lpfc/lpfc_hw.h
+++ b/drivers/scsi/lpfc/lpfc_hw.h
@@ -275,6 +275,7 @@ struct lpfc_sli_ct_request {
 #define  SLI_CT_ACCESS_DENIED             0x10
 #define  SLI_CT_INVALID_PORT_ID           0x11
 #define  SLI_CT_DATABASE_EMPTY            0x12
+#define  SLI_CT_APP_ID_NOT_AVAILABLE      0x40
 
 /*
  * Name Server Command Codes
@@ -400,16 +401,16 @@ struct csp {
 	uint16_t altBbCredit:1;	/* FC Word 1, bit 27 */
 	uint16_t edtovResolution:1;	/* FC Word 1, bit 26 */
 	uint16_t multicast:1;	/* FC Word 1, bit 25 */
-	uint16_t broadcast:1;	/* FC Word 1, bit 24 */
+	uint16_t app_hdr_support:1;	/* FC Word 1, bit 24 */
 
-	uint16_t huntgroup:1;	/* FC Word 1, bit 23 */
+	uint16_t priority_tagging:1;	/* FC Word 1, bit 23 */
 	uint16_t simplex:1;	/* FC Word 1, bit 22 */
 	uint16_t word1Reserved1:3;	/* FC Word 1, bit 21:19 */
 	uint16_t dhd:1;		/* FC Word 1, bit 18 */
 	uint16_t contIncSeqCnt:1;	/* FC Word 1, bit 17 */
 	uint16_t payloadlength:1;	/* FC Word 1, bit 16 */
 #else	/*  __LITTLE_ENDIAN_BITFIELD */
-	uint16_t broadcast:1;	/* FC Word 1, bit 24 */
+	uint16_t app_hdr_support:1;	/* FC Word 1, bit 24 */
 	uint16_t multicast:1;	/* FC Word 1, bit 25 */
 	uint16_t edtovResolution:1;	/* FC Word 1, bit 26 */
 	uint16_t altBbCredit:1;	/* FC Word 1, bit 27 */
@@ -423,7 +424,7 @@ struct csp {
 	uint16_t dhd:1;		/* FC Word 1, bit 18 */
 	uint16_t word1Reserved1:3;	/* FC Word 1, bit 21:19 */
 	uint16_t simplex:1;	/* FC Word 1, bit 22 */
-	uint16_t huntgroup:1;	/* FC Word 1, bit 23 */
+	uint16_t priority_tagging:1;	/* FC Word 1, bit 23 */
 #endif
 
 	uint8_t bbRcvSizeMsb;	/* Upper nibble is reserved */
@@ -607,6 +608,8 @@ struct fc_vft_header {
 #define ELS_CMD_LIRR      0x7A000000
 #define ELS_CMD_LCB	  0x81000000
 #define ELS_CMD_FPIN	  0x16000000
+#define ELS_CMD_QFPA      0xB0000000
+#define ELS_CMD_UVEM      0xB1000000
 #else	/*  __LITTLE_ENDIAN_BITFIELD */
 #define ELS_CMD_MASK      0xffff
 #define ELS_RSP_MASK      0xff
@@ -649,6 +652,8 @@ struct fc_vft_header {
 #define ELS_CMD_LIRR      0x7A
 #define ELS_CMD_LCB	  0x81
 #define ELS_CMD_FPIN	  ELS_FPIN
+#define ELS_CMD_QFPA      0xB0
+#define ELS_CMD_UVEM      0xB1
 #endif
 
 /*
@@ -1317,6 +1322,117 @@ struct fc_rdp_res_frame {
 };
 
 
+/* UVEM */
+
+#define LPFC_UVEM_SIZE 60
+#define LPFC_UVEM_VEM_ID_DESC_SIZE 16
+#define LPFC_UVEM_VE_MAP_DESC_SIZE 20
+
+#define VEM_ID_DESC_TAG  0x0001000A
+struct lpfc_vem_id_desc {
+	uint32_t tag;
+	uint32_t length;
+	uint8_t vem_id[16];
+};
+
+#define LPFC_QFPA_SIZE	4
+
+#define INSTANTIATED_VE_DESC_TAG  0x0001000B
+struct instantiated_ve_desc {
+	uint32_t tag;
+	uint32_t length;
+	uint8_t global_vem_id[16];
+	uint32_t word6;
+#define lpfc_instantiated_local_id_SHIFT   0
+#define lpfc_instantiated_local_id_MASK    0x000000ff
+#define lpfc_instantiated_local_id_WORD    word6
+#define lpfc_instantiated_nport_id_SHIFT   8
+#define lpfc_instantiated_nport_id_MASK    0x00ffffff
+#define lpfc_instantiated_nport_id_WORD    word6
+};
+
+#define DEINSTANTIATED_VE_DESC_TAG  0x0001000C
+struct deinstantiated_ve_desc {
+	uint32_t tag;
+	uint32_t length;
+	uint8_t global_vem_id[16];
+	uint32_t word6;
+#define lpfc_deinstantiated_nport_id_SHIFT   0
+#define lpfc_deinstantiated_nport_id_MASK    0x000000ff
+#define lpfc_deinstantiated_nport_id_WORD    word6
+#define lpfc_deinstantiated_local_id_SHIFT   24
+#define lpfc_deinstantiated_local_id_MASK    0x00ffffff
+#define lpfc_deinstantiated_local_id_WORD    word6
+};
+
+/* Query Fabric Priority Allocation Response */
+#define LPFC_PRIORITY_RANGE_DESC_SIZE 12
+
+struct priority_range_desc {
+	uint32_t tag;
+	uint32_t length;
+	uint8_t lo_range;
+	uint8_t hi_range;
+	uint8_t qos_priority;
+	uint8_t local_ve_id;
+};
+
+struct fc_qfpa_res {
+	uint32_t reply_sequence;	/* LS_ACC or LS_RJT */
+	uint32_t length;	/* FC Word 1    */
+	struct priority_range_desc desc[1];
+};
+
+/* Application Server command code */
+/* VMID               */
+
+#define SLI_CT_APP_SEV_Subtypes     0x20	/* Application Server subtype */
+
+#define SLI_CTAS_GAPPIA_ENT    0x0100	/* Get Application Identifier */
+#define SLI_CTAS_GALLAPPIA     0x0101	/* Get All Application Identifier */
+#define SLI_CTAS_GALLAPPIA_ID  0x0102	/* Get All Application Identifier */
+					/* for Nport */
+#define SLI_CTAS_GAPPIA_IDAPP  0x0103	/* Get Application Identifier */
+					/* for Nport */
+#define SLI_CTAS_RAPP_IDENT    0x0200	/* Register Application Identifier */
+#define SLI_CTAS_DAPP_IDENT    0x0300	/* Deregister Application */
+					/* Identifier */
+#define SLI_CTAS_DALLAPP_ID    0x0301	/* Deregister All Application */
+					/* Identifier */
+
+struct entity_id_object {
+	uint8_t entity_id_len;
+	uint8_t entity_id[255];	/* VM UUID */
+};
+
+struct app_id_object {
+	uint32_t port_id;
+	uint32_t app_id;
+	struct entity_id_object obj;
+};
+
+struct lpfc_vmid_rapp_ident_list {
+	uint32_t no_of_objects;
+	struct entity_id_object obj[1];
+};
+
+struct lpfc_vmid_dapp_ident_list {
+	uint32_t no_of_objects;
+	struct entity_id_object obj[1];
+};
+
+#define GALLAPPIA_ID_LAST  0x80
+struct lpfc_vmid_gallapp_ident_list {
+	uint8_t control;
+	uint8_t reserved[3];
+	struct app_id_object app_id;
+};
+
+#define RAPP_IDENT_OFFSET  (offsetof(struct lpfc_sli_ct_request, un) + 4)
+#define DAPP_IDENT_OFFSET  (offsetof(struct lpfc_sli_ct_request, un) + 4)
+#define GALLAPPIA_ID_SIZE  (offsetof(struct lpfc_sli_ct_request, un) + 4)
+#define DALLAPP_ID_SIZE    (offsetof(struct lpfc_sli_ct_request, un) + 4)
+
 /******** FDMI ********/
 
 /* lpfc_sli_ct_request defines the CT_IU preamble for FDMI commands */
diff --git a/drivers/scsi/lpfc/lpfc_sli.h b/drivers/scsi/lpfc/lpfc_sli.h
index e40da1a7ff77..dde8eb9d796d 100644
--- a/drivers/scsi/lpfc/lpfc_sli.h
+++ b/drivers/scsi/lpfc/lpfc_sli.h
@@ -35,6 +35,12 @@ typedef enum _lpfc_ctx_cmd {
 	LPFC_CTX_HOST
 } lpfc_ctx_cmd;
 
+union lpfc_vmid_iocb_tag {
+	uint32_t app_id;
+	uint8_t cs_ctl_vmid;
+	struct lpfc_vmid_context *vmid_context;	/* UVEM context information */
+};
+
 struct lpfc_cq_event {
 	struct list_head list;
 	uint16_t hdwq;
@@ -100,6 +106,7 @@ struct lpfc_iocbq {
 #define LPFC_IO_NVME	        0x200000 /* NVME FCP command */
 #define LPFC_IO_NVME_LS		0x400000 /* NVME LS command */
 #define LPFC_IO_NVMET		0x800000 /* NVMET command */
+#define LPFC_IO_VMID            0x1000000 /* VMID tagged IO */
 
 	uint32_t drvrTimeout;	/* driver timeout in seconds */
 	struct lpfc_vport *vport;/* virtual port pointer */
@@ -115,6 +122,7 @@ struct lpfc_iocbq {
 		struct lpfc_node_rrq *rrq;
 	} context_un;
 
+	union lpfc_vmid_iocb_tag vmid_tag;
 	void (*fabric_iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 			   struct lpfc_iocbq *);
 	void (*wait_iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 05/13] lpfc: vmid: VMID params initialization
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (3 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 04/13] lpfc: vmid: Add the datastructure for supporting VMID in lpfc Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 06/13] lpfc: vmid: Add support for vmid in mailbox command, does vmid resource allocation and vmid cleanup Muneendra Kumar
                   ` (7 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch initializes the VMID parameters like the type of vmid, max
number of vmids supported and timeout value for the vmid registration
based on the user input.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
No change

v9:
updated comments

v8:
No change

v7:
No change

v6:
No change

v5:
No change

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_attr.c | 48 +++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index c5e96cb904c8..eb88aaaf36eb 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -6162,6 +6162,45 @@ LPFC_ATTR_RW(enable_dpp, 1, 0, 1, "Enable Direct Packet Push");
  */
 LPFC_ATTR_R(enable_mi, 1, 0, 1, "Enable MI");
 
+/*
+ * lpfc_max_vmid: Maximum number of VMs to be tagged. This is valid only if
+ * either vmid_app_header or vmid_priority_tagging is enabled.
+ *       4 - 255  = vmid support enabled for 4-255 VMs
+ *       Value range is [4,255].
+ */
+LPFC_ATTR_RW(max_vmid, LPFC_MIN_VMID, LPFC_MIN_VMID, LPFC_MAX_VMID,
+	     "Maximum number of VMs supported");
+
+/*
+ * lpfc_vmid_inactivity_timeout: Inactivity timeout duration in hours
+ *       0  = Timeout is disabled
+ * Value range is [0,24].
+ */
+LPFC_ATTR_RW(vmid_inactivity_timeout, 4, 0, 24,
+	     "Inactivity timeout in hours");
+
+/*
+ * lpfc_vmid_app_header: Enable App Header VMID support
+ *       0  = Support is disabled (default)
+ *       1  = Support is enabled
+ * Value range is [0,1].
+ */
+LPFC_ATTR_RW(vmid_app_header, LPFC_VMID_APP_HEADER_DISABLE,
+	     LPFC_VMID_APP_HEADER_DISABLE, LPFC_VMID_APP_HEADER_ENABLE,
+	     "Enable App Header VMID support");
+
+/*
+ * lpfc_vmid_priority_tagging: Enable Priority Tagging VMID support
+ *       0  = Support is disabled (default)
+ *       1  = Allow supported targets only
+ *       2  = Allow all targets
+ * Value range is [0,2].
+ */
+LPFC_ATTR_RW(vmid_priority_tagging, LPFC_VMID_PRIO_TAG_DISABLE,
+	     LPFC_VMID_PRIO_TAG_DISABLE,
+	     LPFC_VMID_PRIO_TAG_ALL_TARGETS,
+	     "Enable Priority Tagging VMID support");
+
 struct device_attribute *lpfc_hba_attrs[] = {
 	&dev_attr_nvme_info,
 	&dev_attr_scsi_stat,
@@ -6281,6 +6320,10 @@ struct device_attribute *lpfc_hba_attrs[] = {
 	&dev_attr_lpfc_enable_bbcr,
 	&dev_attr_lpfc_enable_dpp,
 	&dev_attr_lpfc_enable_mi,
+	&dev_attr_lpfc_max_vmid,
+	&dev_attr_lpfc_vmid_inactivity_timeout,
+	&dev_attr_lpfc_vmid_app_header,
+	&dev_attr_lpfc_vmid_priority_tagging,
 	NULL,
 };
 
@@ -7357,6 +7400,11 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
 	lpfc_enable_hba_heartbeat_init(phba, lpfc_enable_hba_heartbeat);
 
 	lpfc_EnableXLane_init(phba, lpfc_EnableXLane);
+	/* VMID Inits */
+	lpfc_max_vmid_init(phba, lpfc_max_vmid);
+	lpfc_vmid_inactivity_timeout_init(phba, lpfc_vmid_inactivity_timeout);
+	lpfc_vmid_app_header_init(phba, lpfc_vmid_app_header);
+	lpfc_vmid_priority_tagging_init(phba, lpfc_vmid_priority_tagging);
 	if (phba->sli_rev != LPFC_SLI_REV4)
 		phba->cfg_EnableXLane = 0;
 	lpfc_XLanePriority_init(phba, lpfc_XLanePriority);
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 06/13] lpfc: vmid: Add support for vmid in mailbox command, does vmid resource allocation and vmid cleanup
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (4 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 05/13] lpfc: vmid: VMID params initialization Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 07/13] lpfc: vmid: Implements ELS commands for appid patch Muneendra Kumar
                   ` (6 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch does the following -
1.adds supporting datastructures for mailbox command which helps in
determining if the firmware supports appid or not.
2.This patch allocates the resource for vmid and checks if the firmware
supports the feature or not.
3.The patch cleans up the vmid resources and stops the timer.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
No change

v9:
Modified code for use of hashtable

v8:
Added new function declaration, return error code and
memory allocation API changes

v7:
No change

v6:
Added Forward declarations and functions to static

v5:
Merged patches 8 and 11 of v4 to this patch
Changed Return code to non-numeric/Symbol

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_hw4.h  | 12 +++++++
 drivers/scsi/lpfc/lpfc_init.c | 64 +++++++++++++++++++++++++++++++++++
 drivers/scsi/lpfc/lpfc_mbox.c |  6 ++++
 drivers/scsi/lpfc/lpfc_scsi.c | 29 ++++++++++++++++
 drivers/scsi/lpfc/lpfc_sli.c  |  9 +++++
 5 files changed, 120 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index f77e71e6dbbd..eb8c735a243b 100644
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -273,6 +273,9 @@ struct lpfc_sli4_flags {
 #define lpfc_vfi_rsrc_rdy_MASK		0x00000001
 #define lpfc_vfi_rsrc_rdy_WORD		word0
 #define LPFC_VFI_RSRC_RDY		1
+#define lpfc_ftr_ashdr_SHIFT            4
+#define lpfc_ftr_ashdr_MASK             0x00000001
+#define lpfc_ftr_ashdr_WORD             word0
 };
 
 struct sli4_bls_rsp {
@@ -2944,6 +2947,9 @@ struct lpfc_mbx_request_features {
 #define lpfc_mbx_rq_ftr_rq_mrqp_SHIFT		16
 #define lpfc_mbx_rq_ftr_rq_mrqp_MASK		0x00000001
 #define lpfc_mbx_rq_ftr_rq_mrqp_WORD		word2
+#define lpfc_mbx_rq_ftr_rq_ashdr_SHIFT          17
+#define lpfc_mbx_rq_ftr_rq_ashdr_MASK           0x00000001
+#define lpfc_mbx_rq_ftr_rq_ashdr_WORD           word2
 	uint32_t word3;
 #define lpfc_mbx_rq_ftr_rsp_iaab_SHIFT		0
 #define lpfc_mbx_rq_ftr_rsp_iaab_MASK		0x00000001
@@ -2975,6 +2981,9 @@ struct lpfc_mbx_request_features {
 #define lpfc_mbx_rq_ftr_rsp_mrqp_SHIFT		16
 #define lpfc_mbx_rq_ftr_rsp_mrqp_MASK		0x00000001
 #define lpfc_mbx_rq_ftr_rsp_mrqp_WORD		word3
+#define lpfc_mbx_rq_ftr_rsp_ashdr_SHIFT         17
+#define lpfc_mbx_rq_ftr_rsp_ashdr_MASK          0x00000001
+#define lpfc_mbx_rq_ftr_rsp_ashdr_WORD          word3
 };
 
 struct lpfc_mbx_memory_dump_type3 {
@@ -4219,6 +4228,9 @@ struct wqe_common {
 #define wqe_xchg_WORD         word10
 #define LPFC_SCSI_XCHG	      0x0
 #define LPFC_NVME_XCHG	      0x1
+#define wqe_appid_SHIFT       5
+#define wqe_appid_MASK        0x00000001
+#define wqe_appid_WORD        word10
 #define wqe_oas_SHIFT         6
 #define wqe_oas_MASK          0x00000001
 #define wqe_oas_WORD          word10
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index f81dfa3cb0a1..d6434e4ffa20 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -98,6 +98,7 @@ static struct scsi_transport_template *lpfc_transport_template = NULL;
 static struct scsi_transport_template *lpfc_vport_transport_template = NULL;
 static DEFINE_IDR(lpfc_hba_index);
 #define LPFC_NVMET_BUF_POST 254
+static int lpfc_vmid_res_alloc(struct lpfc_hba *phba, struct lpfc_vport *vport);
 
 /**
  * lpfc_config_port_prep - Perform lpfc initialization prior to config port
@@ -2888,6 +2889,10 @@ lpfc_cleanup(struct lpfc_vport *vport)
 	if (phba->link_state > LPFC_LINK_DOWN)
 		lpfc_port_link_failure(vport);
 
+	/* cleanup vmid resources */
+	if (lpfc_is_vmid_enabled(phba))
+		lpfc_vmid_vport_cleanup(vport);
+
 	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 		if (vport->port_type != LPFC_PHYSICAL_PORT &&
 		    ndlp->nlp_DID == Fabric_DID) {
@@ -4307,6 +4312,57 @@ lpfc_get_wwpn(struct lpfc_hba *phba)
 		return rol64(wwn, 32);
 }
 
+/**
+ * lpfc_vmid_res_alloc - Allocates resources for VMID
+ * @phba: pointer to lpfc hba data structure.
+ * @vport: pointer to vport data structure
+ *
+ * This routine allocated the resources needed for the vmid.
+ *
+ * Return codes
+ *	0 on Succeess
+ *	Non-0 on Failure
+ */
+static int
+lpfc_vmid_res_alloc(struct lpfc_hba *phba, struct lpfc_vport *vport)
+{
+	/* vmid feature is supported only on SLI4 */
+	if (phba->sli_rev == LPFC_SLI_REV3) {
+		phba->cfg_vmid_app_header = 0;
+		phba->cfg_vmid_priority_tagging = 0;
+	}
+
+	/* if enabled, then allocated the resources */
+	if (lpfc_is_vmid_enabled(phba)) {
+		vport->vmid =
+		    kcalloc(phba->cfg_max_vmid, sizeof(struct lpfc_vmid),
+			    GFP_KERNEL);
+		if (!vport->vmid)
+			return -ENOMEM;
+
+		rwlock_init(&vport->vmid_lock);
+
+		/* setting the VMID parameters for the vport */
+		vport->vmid_priority_tagging = phba->cfg_vmid_priority_tagging;
+		vport->vmid_inactivity_timeout =
+		    phba->cfg_vmid_inactivity_timeout;
+		vport->max_vmid = phba->cfg_max_vmid;
+		vport->cur_vmid_cnt = 0;
+
+		vport->vmid_priority_range = bitmap_zalloc
+			(LPFC_VMID_MAX_PRIORITY_RANGE, GFP_KERNEL);
+
+		if (!vport->vmid_priority_range) {
+			kfree(vport->vmid);
+			return -ENOMEM;
+		}
+
+		/* Initialize the hashtable */
+		hash_init(vport->hash_table);
+	}
+	return 0;
+}
+
 /**
  * lpfc_create_port - Create an FC port
  * @phba: pointer to lpfc hba data structure.
@@ -4459,6 +4515,12 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 			vport->port_type, shost->sg_tablesize,
 			phba->cfg_scsi_seg_cnt, phba->cfg_sg_seg_cnt);
 
+	/* allocate the resources for vmid */
+	rc = lpfc_vmid_res_alloc(phba, vport);
+
+	if (rc)
+		goto out;
+
 	/* Initialize all internally managed lists. */
 	INIT_LIST_HEAD(&vport->fc_nodes);
 	INIT_LIST_HEAD(&vport->rcv_buffer_list);
@@ -4483,6 +4545,8 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 	return vport;
 
 out_put_shost:
+	kfree(vport->vmid);
+	bitmap_free(vport->vmid_priority_range);
 	scsi_host_put(shost);
 out:
 	return NULL;
diff --git a/drivers/scsi/lpfc/lpfc_mbox.c b/drivers/scsi/lpfc/lpfc_mbox.c
index eab991739e37..698243ca8f09 100644
--- a/drivers/scsi/lpfc/lpfc_mbox.c
+++ b/drivers/scsi/lpfc/lpfc_mbox.c
@@ -2101,6 +2101,12 @@ lpfc_request_features(struct lpfc_hba *phba, struct lpfcMboxq *mboxq)
 		bf_set(lpfc_mbx_rq_ftr_rq_iaab, &mboxq->u.mqe.un.req_ftrs, 0);
 		bf_set(lpfc_mbx_rq_ftr_rq_iaar, &mboxq->u.mqe.un.req_ftrs, 0);
 	}
+
+	/* Enable Application Services Header for apphedr VMID */
+	if (phba->cfg_vmid_app_header) {
+		bf_set(lpfc_mbx_rq_ftr_rq_ashdr, &mboxq->u.mqe.un.req_ftrs, 1);
+		bf_set(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags, 1);
+	}
 	return;
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index b8bb012abb33..37188a6c5c27 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -5417,6 +5417,35 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
 	return 0;
 }
 
+/*
+ * lpfc_vmid_vport_cleanup - cleans up the resources associated with a vports
+ * @vport: The virtual port for which this call is being executed.
+ */
+void lpfc_vmid_vport_cleanup(struct lpfc_vport *vport)
+{
+	u32 bucket;
+	struct lpfc_vmid *cur;
+
+	/* delete the timer */
+	if (vport->port_type == LPFC_PHYSICAL_PORT)
+		del_timer_sync(&vport->phba->inactive_vmid_poll);
+
+	/* free the resources */
+	kfree(vport->qfpa_res);
+	kfree(vport->vmid_priority.vmid_range);
+	kfree(vport->vmid);
+
+	/* for all elements in the hash table */
+	if (!hash_empty(vport->hash_table))
+		hash_for_each(vport->hash_table, bucket, cur, hnode)
+			hash_del(&cur->hnode);
+
+	/* reset variables */
+	vport->qfpa_res = NULL;
+	vport->vmid_priority.vmid_range = NULL;
+	vport->vmid = NULL;
+	vport->cur_vmid_cnt = 0;
+}
 
 /**
  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 1ad1beb2a8a8..c7d0acd6c8ef 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -7699,6 +7699,15 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 		goto out_free_mbox;
 	}
 
+	/* Disable vmid if app header is not supported */
+	if (phba->cfg_vmid_app_header && !(bf_get(lpfc_mbx_rq_ftr_rsp_ashdr,
+						  &mqe->un.req_ftrs))) {
+		bf_set(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags, 0);
+		phba->cfg_vmid_app_header = 0;
+		lpfc_printf_log(phba, KERN_DEBUG, LOG_SLI,
+				"1242 vmid feature not supported\n");
+	}
+
 	/*
 	 * The port must support FCP initiator mode as this is the
 	 * only mode running in the host.
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 07/13] lpfc: vmid: Implements ELS commands for appid patch
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (5 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 06/13] lpfc: vmid: Add support for vmid in mailbox command, does vmid resource allocation and vmid cleanup Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 08/13] lpfc: vmid: Functions to manage vmids Muneendra Kumar
                   ` (5 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch implements ELS command like QFPA and UVEM for the priority
tagging appid support. Other supporting functions are also part of this
patch.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
Fixed the Spelling correction

v9:
Added a lock while accessing a flag

v8:
Added log messages modifications, memory allocation API changes,
return error codes

v7:
No change

v6:
Added Forward declarations, static functions and
removed unused variables

v5:
Changed Return code to non-numeric/Symbol.
Addressed the review comments by Hannes

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_els.c | 366 ++++++++++++++++++++++++++++++++++-
 1 file changed, 362 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index be9c92d97d63..d71782d0dc27 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -25,6 +25,7 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
+#include <linux/delay.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_device.h>
@@ -55,9 +56,15 @@ static int lpfc_issue_els_fdisc(struct lpfc_vport *vport,
 				struct lpfc_nodelist *ndlp, uint8_t retry);
 static int lpfc_issue_fabric_iocb(struct lpfc_hba *phba,
 				  struct lpfc_iocbq *iocb);
+static void lpfc_cmpl_els_uvem(struct lpfc_hba *, struct lpfc_iocbq *,
+			       struct lpfc_iocbq *);
 
 static int lpfc_max_els_tries = 3;
 
+static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport);
+static void lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max);
+static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid);
+
 /**
  * lpfc_els_chk_latt - Check host link attention event for a vport
  * @vport: pointer to a host virtual N_Port data structure.
@@ -314,10 +321,10 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 				 "0116 Xmit ELS command x%x to remote "
 				 "NPORT x%x I/O tag: x%x, port state:x%x "
-				 "rpi x%x fc_flag:x%x\n",
+				 "rpi x%x fc_flag:x%x nlp_flag:x%x vport:x%p\n",
 				 elscmd, did, elsiocb->iotag,
 				 vport->port_state, ndlp->nlp_rpi,
-				 vport->fc_flag);
+				 vport->fc_flag, ndlp->nlp_flag, vport);
 	} else {
 		/* Xmit ELS response <elsCmd> to remote NPORT <did> */
 		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
@@ -1112,11 +1119,15 @@ lpfc_cmpl_els_flogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	/* FLOGI completes successfully */
 	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 			 "0101 FLOGI completes successfully, I/O tag:x%x, "
-			 "xri x%x Data: x%x x%x x%x x%x x%x %x\n",
+			 "xri x%x Data: x%x x%x x%x x%x x%x x%x x%x\n",
 			 cmdiocb->iotag, cmdiocb->sli4_xritag,
 			 irsp->un.ulpWord[4], sp->cmn.e_d_tov,
 			 sp->cmn.w2.r_a_tov, sp->cmn.edtovResolution,
-			 vport->port_state, vport->fc_flag);
+			 vport->port_state, vport->fc_flag,
+			 sp->cmn.priority_tagging);
+
+	if (sp->cmn.priority_tagging)
+		vport->vmid_flag |= LPFC_VMID_ISSUE_QFPA;
 
 	if (vport->port_state == LPFC_FLOGI) {
 		/*
@@ -1308,6 +1319,18 @@ lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	if (sp->cmn.fcphHigh < FC_PH3)
 		sp->cmn.fcphHigh = FC_PH3;
 
+	/* to determine if switch supports priority tagging */
+	if (phba->cfg_vmid_priority_tagging) {
+		sp->cmn.priority_tagging = 1;
+		/* lpfc_vmid_host_uuid is combination of wwpn and wwnn */
+		if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid)) {
+			memcpy(vport->lpfc_vmid_host_uuid, phba->wwpn,
+			       sizeof(phba->wwpn));
+			memcpy(&vport->lpfc_vmid_host_uuid[8], phba->wwnn,
+			       sizeof(phba->wwnn));
+		}
+	}
+
 	if  (phba->sli_rev == LPFC_SLI_REV4) {
 		if (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) ==
 		    LPFC_SLI_INTF_IF_TYPE_0) {
@@ -1934,6 +1957,7 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	struct lpfc_nodelist *ndlp, *free_ndlp;
 	struct lpfc_dmabuf *prsp;
 	int disc;
+	struct serv_parm *sp = NULL;
 
 	/* we pass cmdiocb to state machine which needs rspiocb as well */
 	cmdiocb->context_un.rsp_iocb = rspiocb;
@@ -2035,6 +2059,23 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 				   cmdiocb->context2)->list.next,
 				  struct lpfc_dmabuf, list);
 		ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
+
+		sp = (struct serv_parm *)((u8 *)prsp->virt +
+					  sizeof(u32));
+
+		ndlp->vmid_support = 0;
+		if ((phba->cfg_vmid_app_header && sp->cmn.app_hdr_support) ||
+		    (phba->cfg_vmid_priority_tagging &&
+		     sp->cmn.priority_tagging)) {
+			lpfc_printf_log(phba, KERN_DEBUG, LOG_ELS,
+					"4018 app_hdr_support %d tagging %d DID x%x\n",
+					sp->cmn.app_hdr_support,
+					sp->cmn.priority_tagging,
+					ndlp->nlp_DID);
+			/* if the dest port supports VMID, mark it in ndlp */
+			ndlp->vmid_support = 1;
+		}
+
 		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
 					NLP_EVT_CMPL_PLOGI);
 	}
@@ -2157,6 +2198,14 @@ lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
 	memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
 	sp->cmn.bbRcvSizeMsb &= 0xF;
 
+	/* check if the destination port supports VMID */
+	ndlp->vmid_support = 0;
+	if (vport->vmid_priority_tagging)
+		sp->cmn.priority_tagging = 1;
+	else if (phba->cfg_vmid_app_header &&
+		 bf_get(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags))
+		sp->cmn.app_hdr_support = 1;
+
 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 		"Issue PLOGI:     did:x%x",
 		did, 0, 0);
@@ -10465,3 +10514,312 @@ lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
 	lpfc_unreg_rpi(vport, ndlp);
 }
 
+static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport)
+{
+	bitmap_zero(vport->vmid_priority_range, LPFC_VMID_MAX_PRIORITY_RANGE);
+}
+
+static void
+lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max)
+{
+	u32 i;
+
+	if ((min > max) || (max > LPFC_VMID_MAX_PRIORITY_RANGE))
+		return;
+
+	for (i = min; i <= max; i++)
+		set_bit(i, vport->vmid_priority_range);
+}
+
+static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid)
+{
+	set_bit(ctcl_vmid, vport->vmid_priority_range);
+}
+
+u32 lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport)
+{
+	u32 i;
+
+	i = find_first_bit(vport->vmid_priority_range,
+			   LPFC_VMID_MAX_PRIORITY_RANGE);
+
+	if (i == LPFC_VMID_MAX_PRIORITY_RANGE)
+		return 0;
+
+	clear_bit(i, vport->vmid_priority_range);
+	return i;
+}
+
+#define MAX_PRIORITY_DESC	255
+
+static void
+lpfc_cmpl_els_qfpa(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		   struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct priority_range_desc *desc;
+	struct lpfc_dmabuf *prsp = NULL;
+	struct lpfc_vmid_priority_range *vmid_range = NULL;
+	u32 *data;
+	struct lpfc_dmabuf *dmabuf = cmdiocb->context2;
+	IOCB_t *irsp = &rspiocb->iocb;
+	u8 *pcmd, max_desc;
+	u32 len, i;
+	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
+
+	prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
+	if (!prsp)
+		goto out;
+
+	pcmd = prsp->virt;
+	data = (u32 *)pcmd;
+	if (data[0] == ELS_CMD_LS_RJT) {
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
+				 "3277 QFPA LS_RJT x%x  x%x\n",
+				 data[0], data[1]);
+		goto out;
+	}
+	if (irsp->ulpStatus) {
+		lpfc_printf_vlog(vport, KERN_ERR, LOG_SLI,
+				 "6529 QFPA failed with status x%x  x%x\n",
+				 irsp->ulpStatus, irsp->un.ulpWord[4]);
+		goto out;
+	}
+
+	if (!vport->qfpa_res) {
+		max_desc = FCELSSIZE / sizeof(*vport->qfpa_res);
+		vport->qfpa_res = kcalloc(max_desc, sizeof(*vport->qfpa_res),
+					  GFP_KERNEL);
+		if (!vport->qfpa_res)
+			goto out;
+	}
+
+	len = *((u32 *)(pcmd + 4));
+	len = be32_to_cpu(len);
+	memcpy(vport->qfpa_res, pcmd, len + 8);
+	len = len / LPFC_PRIORITY_RANGE_DESC_SIZE;
+
+	desc = (struct priority_range_desc *)(pcmd + 8);
+	vmid_range = vport->vmid_priority.vmid_range;
+	if (!vmid_range) {
+		vmid_range = kcalloc(MAX_PRIORITY_DESC, sizeof(*vmid_range),
+				     GFP_KERNEL);
+		if (!vmid_range) {
+			kfree(vport->qfpa_res);
+			goto out;
+		}
+		vport->vmid_priority.vmid_range = vmid_range;
+	}
+	vport->vmid_priority.num_descriptors = len;
+
+	for (i = 0; i < len; i++, vmid_range++, desc++) {
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
+				 "6539 vmid values low=%d, high=%d, qos=%d, "
+				 "local ve id=%d\n", desc->lo_range,
+				 desc->hi_range, desc->qos_priority,
+				 desc->local_ve_id);
+
+		vmid_range->low = desc->lo_range << 1;
+		if (desc->local_ve_id == QFPA_ODD_ONLY)
+			vmid_range->low++;
+		if (desc->qos_priority)
+			vport->vmid_flag |= LPFC_VMID_QOS_ENABLED;
+		vmid_range->qos = desc->qos_priority;
+
+		vmid_range->high = desc->hi_range << 1;
+		if ((desc->local_ve_id == QFPA_ODD_ONLY) ||
+		    (desc->local_ve_id == QFPA_EVEN_ODD))
+			vmid_range->high++;
+	}
+	lpfc_init_cs_ctl_bitmap(vport);
+	for (i = 0; i < vport->vmid_priority.num_descriptors; i++) {
+		lpfc_vmid_set_cs_ctl_range(vport,
+				vport->vmid_priority.vmid_range[i].low,
+				vport->vmid_priority.vmid_range[i].high);
+	}
+
+	vport->vmid_flag |= LPFC_VMID_QFPA_CMPL;
+ out:
+	lpfc_els_free_iocb(phba, cmdiocb);
+	lpfc_nlp_put(ndlp);
+}
+
+int lpfc_issue_els_qfpa(struct lpfc_vport *vport)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_iocbq *elsiocb;
+	u8 *pcmd;
+	int ret;
+
+	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		return -ENXIO;
+
+	elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_QFPA_SIZE, 2, ndlp,
+				     ndlp->nlp_DID, ELS_CMD_QFPA);
+	if (!elsiocb)
+		return -ENOMEM;
+
+	pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
+
+	*((u32 *)(pcmd)) = ELS_CMD_QFPA;
+	pcmd += 4;
+
+	elsiocb->iocb_cmpl = lpfc_cmpl_els_qfpa;
+
+	elsiocb->context1 = lpfc_nlp_get(ndlp);
+	if (!elsiocb->context1) {
+		lpfc_els_free_iocb(vport->phba, elsiocb);
+		return -ENXIO;
+	}
+
+	ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 2);
+	if (ret != IOCB_SUCCESS) {
+		lpfc_els_free_iocb(phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		return -EIO;
+	}
+	vport->vmid_flag &= ~LPFC_VMID_QOS_ENABLED;
+	return 0;
+}
+
+int
+lpfc_vmid_uvem(struct lpfc_vport *vport,
+	       struct lpfc_vmid *vmid, bool instantiated)
+{
+	struct lpfc_vem_id_desc *vem_id_desc;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_iocbq *elsiocb;
+	struct instantiated_ve_desc *inst_desc;
+	struct lpfc_vmid_context *vmid_context;
+	u8 *pcmd;
+	u32 *len;
+	int ret = 0;
+
+	ndlp = lpfc_findnode_did(vport, Fabric_DID);
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		return -ENXIO;
+
+	vmid_context = kmalloc(sizeof(*vmid_context), GFP_KERNEL);
+	if (!vmid_context)
+		return -ENOMEM;
+	elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_UVEM_SIZE, 2,
+				     ndlp, Fabric_DID, ELS_CMD_UVEM);
+	if (!elsiocb)
+		goto out;
+
+	lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
+			 "3427 Host vmid %s %d\n",
+			 vmid->host_vmid, instantiated);
+	vmid_context->vmp = vmid;
+	vmid_context->nlp = ndlp;
+	vmid_context->instantiated = instantiated;
+	elsiocb->vmid_tag.vmid_context = vmid_context;
+	pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
+
+	if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid))
+		memcpy(vport->lpfc_vmid_host_uuid, vmid->host_vmid,
+		       LPFC_COMPRESS_VMID_SIZE);
+
+	*((u32 *)(pcmd)) = ELS_CMD_UVEM;
+	len = (u32 *)(pcmd + 4);
+	*len = cpu_to_be32(LPFC_UVEM_SIZE - 8);
+
+	vem_id_desc = (struct lpfc_vem_id_desc *)(pcmd + 8);
+	vem_id_desc->tag = be32_to_cpu(VEM_ID_DESC_TAG);
+	vem_id_desc->length = be32_to_cpu(LPFC_UVEM_VEM_ID_DESC_SIZE);
+	memcpy(vem_id_desc->vem_id, vport->lpfc_vmid_host_uuid,
+	       LPFC_COMPRESS_VMID_SIZE);
+
+	inst_desc = (struct instantiated_ve_desc *)(pcmd + 32);
+	inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
+	inst_desc->length = be32_to_cpu(LPFC_UVEM_VE_MAP_DESC_SIZE);
+	memcpy(inst_desc->global_vem_id, vmid->host_vmid,
+	       LPFC_COMPRESS_VMID_SIZE);
+
+	bf_set(lpfc_instantiated_nport_id, inst_desc, vport->fc_myDID);
+	bf_set(lpfc_instantiated_local_id, inst_desc,
+	       vmid->un.cs_ctl_vmid);
+	if (instantiated) {
+		inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
+	} else {
+		inst_desc->tag = be32_to_cpu(DEINSTANTIATED_VE_DESC_TAG);
+		lpfc_vmid_put_cs_ctl(vport, vmid->un.cs_ctl_vmid);
+	}
+	inst_desc->word6 = cpu_to_be32(inst_desc->word6);
+
+	elsiocb->iocb_cmpl = lpfc_cmpl_els_uvem;
+
+	elsiocb->context1 = lpfc_nlp_get(ndlp);
+	if (!elsiocb->context1) {
+		lpfc_els_free_iocb(vport->phba, elsiocb);
+		goto out;
+	}
+
+	ret = lpfc_sli_issue_iocb(vport->phba, LPFC_ELS_RING, elsiocb, 0);
+	if (ret != IOCB_SUCCESS) {
+		lpfc_els_free_iocb(vport->phba, elsiocb);
+		lpfc_nlp_put(ndlp);
+		goto out;
+	}
+
+	return 0;
+ out:
+	kfree(vmid_context);
+	return -EIO;
+}
+
+static void
+lpfc_cmpl_els_uvem(struct lpfc_hba *phba, struct lpfc_iocbq *icmdiocb,
+		   struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = icmdiocb->vport;
+	struct lpfc_dmabuf *prsp = NULL;
+	struct lpfc_vmid_context *vmid_context =
+	    icmdiocb->vmid_tag.vmid_context;
+	struct lpfc_nodelist *ndlp = icmdiocb->context1;
+	u8 *pcmd;
+	u32 *data;
+	IOCB_t *irsp = &rspiocb->iocb;
+	struct lpfc_dmabuf *dmabuf = icmdiocb->context2;
+	struct lpfc_vmid *vmid;
+
+	vmid = vmid_context->vmp;
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		ndlp = NULL;
+
+	prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
+	if (!prsp)
+		goto out;
+	pcmd = prsp->virt;
+	data = (u32 *)pcmd;
+	if (data[0] == ELS_CMD_LS_RJT) {
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
+				 "4532 UVEM LS_RJT %x %x\n", data[0], data[1]);
+		goto out;
+	}
+	if (irsp->ulpStatus) {
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
+				 "4533 UVEM error status %x: %x\n",
+				 irsp->ulpStatus, irsp->un.ulpWord[4]);
+		goto out;
+	}
+	spin_lock(&phba->hbalock);
+	/* Set IN USE flag */
+	vport->vmid_flag |= LPFC_VMID_IN_USE;
+	phba->pport->vmid_flag |= LPFC_VMID_IN_USE;
+	spin_unlock(&phba->hbalock);
+
+	if (vmid_context->instantiated) {
+		write_lock(&vport->vmid_lock);
+		vmid->flag |= LPFC_VMID_REGISTERED;
+		vmid->flag &= ~LPFC_VMID_REQ_REGISTER;
+		write_unlock(&vport->vmid_lock);
+	}
+
+ out:
+	kfree(vmid_context);
+	lpfc_els_free_iocb(phba, icmdiocb);
+	lpfc_nlp_put(ndlp);
+}
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 08/13] lpfc: vmid: Functions to manage vmids
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (6 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 07/13] lpfc: vmid: Implements ELS commands for appid patch Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08 13:09   ` Hannes Reinecke
  2021-06-08  4:35 ` [PATCH v11 09/13] lpfc: vmid: Implements CT commands for appid Muneendra Kumar
                   ` (4 subsequent siblings)
  12 siblings, 1 reply; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch contains the routines to save, retrieve and remove the vmids
from the data structure. A hash table is used to save the vmids and
the corresponding UUIDs associated with the application/VMs.

Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
Fixed the Function name correction

v9:
Added changes for implementing kernel based hashtable

v8:
Added correct return value and error codes

v7:
No change

v6:
Added Forward declarations and functions to static

v5:
Changed Return code to non-numeric/Symbol

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_scsi.c | 118 ++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 37188a6c5c27..65637d85f9bb 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -28,6 +28,7 @@
 #include <asm/unaligned.h>
 #include <linux/t10-pi.h>
 #include <linux/crc-t10dif.h>
+#include <linux/blk-cgroup.h>
 #include <net/checksum.h>
 
 #include <scsi/scsi.h>
@@ -86,6 +87,14 @@ static void
 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
 static int
 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
+static void
+lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
+			   struct lpfc_vmid *vmp);
+static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
+				   *cmd, struct lpfc_vmid *vmp,
+				   union lpfc_vmid_io_tag *tag);
+static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
+				    struct lpfc_vmid *vmid);
 
 static inline unsigned
 lpfc_cmd_blksize(struct scsi_cmnd *sc)
@@ -5178,6 +5187,115 @@ void lpfc_poll_timeout(struct timer_list *t)
 	}
 }
 
+/*
+ * lpfc_get_vmid_from_hashtable - search the UUID in the hash table
+ * @vport: The virtual port for which this call is being executed.
+ * @hash: calculated hash value
+ * @buf: uuid associated with the VE
+ * Returns the vmid entry associated with the UUID
+ * Make sure to acquire the appropriate lock before invoking this routine.
+ */
+struct lpfc_vmid *lpfc_get_vmid_from_hashtable(struct lpfc_vport *vport,
+					      u32 hash, u8 *buf)
+{
+	struct lpfc_vmid *vmp;
+
+	hash_for_each_possible(vport->hash_table, vmp, hnode, hash) {
+		if (memcmp(&vmp->host_vmid[0], buf, 16) == 0)
+			return vmp;
+	}
+	return NULL;
+}
+
+/*
+ * lpfc_put_vmid_in_hashtable - put the VMID in the hash table
+ * @vport: The virtual port for which this call is being executed.
+ * @hash - calculated hash value
+ * @vmp: Pointer to a VMID entry representing a VM sending IO
+ *
+ * This routine will insert the newly acquired vmid entity in the hash table.
+ * Make sure to acquire the appropriate lock before invoking this routine.
+ */
+static void
+lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
+			   struct lpfc_vmid *vmp)
+{
+	hash_add(vport->hash_table, &vmp->hnode, hash);
+}
+
+/*
+ * lpfc_vmid_hash_fn - creates a hash value of the UUID
+ * @vmid: uuid associated with the VE
+ * @len: length of the vmid string
+ * Returns the calculated hash value
+ */
+int lpfc_vmid_hash_fn(const char *vmid, int len)
+{
+	int c;
+	int hash = 0;
+
+	if (len == 0)
+		return 0;
+	while (len--) {
+		c = *vmid++;
+		if (c >= 'A' && c <= 'Z')
+			c += 'a' - 'A';
+
+		hash = (hash + (c << LPFC_VMID_HASH_SHIFT) +
+			(c >> LPFC_VMID_HASH_SHIFT)) * 19;
+	}
+
+	return hash & LPFC_VMID_HASH_MASK;
+}
+
+/*
+ * lpfc_vmid_update_entry - update the vmid entry in the hash table
+ * @vport: The virtual port for which this call is being executed.
+ * @cmd: address of scsi cmmd descriptor
+ * @vmp: Pointer to a VMID entry representing a VM sending IO
+ * @tag: VMID tag
+ */
+static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
+				   *cmd, struct lpfc_vmid *vmp,
+				   union lpfc_vmid_io_tag *tag)
+{
+	u64 *lta;
+
+	if (vport->vmid_priority_tagging)
+		tag->cs_ctl_vmid = vmp->un.cs_ctl_vmid;
+	else
+		tag->app_id = vmp->un.app_id;
+
+	if (cmd->sc_data_direction == DMA_TO_DEVICE)
+		vmp->io_wr_cnt++;
+	else
+		vmp->io_rd_cnt++;
+
+	/* update the last access timestamp in the table */
+	lta = per_cpu_ptr(vmp->last_io_time, raw_smp_processor_id());
+	*lta = jiffies;
+}
+
+static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
+				    struct lpfc_vmid *vmid)
+{
+	u32 hash;
+	struct lpfc_vmid *pvmid;
+
+	if (vport->port_type == LPFC_PHYSICAL_PORT) {
+		vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
+	} else {
+		hash = lpfc_vmid_hash_fn(vmid->host_vmid, vmid->vmid_len);
+		pvmid =
+		    lpfc_get_vmid_from_hashtable(vport->phba->pport, hash,
+						vmid->host_vmid);
+		if (pvmid)
+			vmid->un.cs_ctl_vmid = pvmid->un.cs_ctl_vmid;
+		else
+			vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
+	}
+}
+
 /**
  * lpfc_queuecommand - scsi_host_template queuecommand entry point
  * @shost: kernel scsi host pointer.
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 09/13] lpfc: vmid: Implements CT commands for appid.
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (7 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 08/13] lpfc: vmid: Functions to manage vmids Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 10/13] lpfc: vmid: Appends the vmid in the wqe before sending Muneendra Kumar
                   ` (3 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

The patch implements CT commands for registering and deregistering the
appid for the application. Also, a small change in decrementing the ndlp
ref counter has been added.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
Function name correction

v9:
Added Changes related to locking and new hashtable implementation

v8:
modified log messages and fixed the refcount

v7:
No Change

v6:
Added Forward declarations and functions to static

v5:
No change

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
Removed redundant code due to changes since last submit
---
 drivers/scsi/lpfc/lpfc_ct.c | 255 ++++++++++++++++++++++++++++++++++++
 1 file changed, 255 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
index cbf1be56b1e7..610b6dabb3b5 100644
--- a/drivers/scsi/lpfc/lpfc_ct.c
+++ b/drivers/scsi/lpfc/lpfc_ct.c
@@ -75,6 +75,9 @@
 
 
 static char *lpfc_release_version = LPFC_DRIVER_VERSION;
+static void
+lpfc_cmpl_ct_cmd_vmid(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		      struct lpfc_iocbq *rspiocb);
 
 static void
 lpfc_ct_ignore_hbq_buffer(struct lpfc_hba *phba, struct lpfc_iocbq *piocbq,
@@ -3777,3 +3780,255 @@ lpfc_decode_firmware_rev(struct lpfc_hba *phba, char *fwrevision, int flag)
 	}
 	return;
 }
+
+static void
+lpfc_cmpl_ct_cmd_vmid(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		      struct lpfc_iocbq *rspiocb)
+{
+	struct lpfc_vport *vport = cmdiocb->vport;
+	struct lpfc_dmabuf *inp = cmdiocb->context1;
+	struct lpfc_dmabuf *outp = cmdiocb->context2;
+	struct lpfc_sli_ct_request *ctcmd = inp->virt;
+	struct lpfc_sli_ct_request *ctrsp = outp->virt;
+	u16 rsp = ctrsp->CommandResponse.bits.CmdRsp;
+	struct app_id_object *app;
+	u32 cmd, hash, bucket;
+	struct lpfc_vmid *vmp, *cur;
+	u8 *data = outp->virt;
+	int i;
+
+	cmd = be16_to_cpu(ctcmd->CommandResponse.bits.CmdRsp);
+	if (cmd == SLI_CTAS_DALLAPP_ID)
+		lpfc_ct_free_iocb(phba, cmdiocb);
+
+	if (lpfc_els_chk_latt(vport) || rspiocb->iocb.ulpStatus) {
+		if (cmd != SLI_CTAS_DALLAPP_ID)
+			return;
+	}
+	/* Check for a CT LS_RJT response */
+	if (rsp == be16_to_cpu(SLI_CT_RESPONSE_FS_RJT)) {
+		if (cmd != SLI_CTAS_DALLAPP_ID)
+			lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+					 "3306 VMID FS_RJT Data: x%x x%x x%x\n",
+					 cmd, ctrsp->ReasonCode,
+					 ctrsp->Explanation);
+		if ((cmd != SLI_CTAS_DALLAPP_ID) ||
+		    (ctrsp->ReasonCode != SLI_CT_UNABLE_TO_PERFORM_REQ) ||
+		    (ctrsp->Explanation != SLI_CT_APP_ID_NOT_AVAILABLE)) {
+			/* If DALLAPP_ID failed retry later */
+			if (cmd == SLI_CTAS_DALLAPP_ID)
+				vport->load_flag |= FC_DEREGISTER_ALL_APP_ID;
+			return;
+		}
+	}
+
+	switch (cmd) {
+	case SLI_CTAS_RAPP_IDENT:
+		app = (struct app_id_object *)(RAPP_IDENT_OFFSET + data);
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+				 "6712 RAPP_IDENT app id %d  port id x%x id "
+				 "len %d\n", be32_to_cpu(app->app_id),
+				 be32_to_cpu(app->port_id),
+				 app->obj.entity_id_len);
+
+		if (app->obj.entity_id_len == 0 || app->port_id == 0)
+			return;
+
+		hash = lpfc_vmid_hash_fn(app->obj.entity_id,
+					 app->obj.entity_id_len);
+		vmp = lpfc_get_vmid_from_hashtable(vport, hash,
+						  app->obj.entity_id);
+		if (vmp) {
+			write_lock(&vport->vmid_lock);
+			vmp->un.app_id = be32_to_cpu(app->app_id);
+			vmp->flag |= LPFC_VMID_REGISTERED;
+			vmp->flag &= ~LPFC_VMID_REQ_REGISTER;
+			write_unlock(&vport->vmid_lock);
+			/* Set IN USE flag */
+			vport->vmid_flag |= LPFC_VMID_IN_USE;
+		} else {
+			lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+					 "6901 No entry found %s hash %d\n",
+					 app->obj.entity_id, hash);
+		}
+		break;
+	case SLI_CTAS_DAPP_IDENT:
+		app = (struct app_id_object *)(DAPP_IDENT_OFFSET + data);
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+				 "6713 DAPP_IDENT app id %d  port id x%x\n",
+				 be32_to_cpu(app->app_id),
+				 be32_to_cpu(app->port_id));
+		break;
+	case SLI_CTAS_DALLAPP_ID:
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+				 "8856 Deregistered all app ids\n");
+		read_lock(&vport->vmid_lock);
+		for (i = 0; i < phba->cfg_max_vmid; i++) {
+			vmp = &vport->vmid[i];
+			if (vmp->flag != LPFC_VMID_SLOT_FREE)
+				memset(vmp, 0, sizeof(struct lpfc_vmid));
+		}
+		read_unlock(&vport->vmid_lock);
+		/* for all elements in the hash table */
+		if (!hash_empty(vport->hash_table))
+			hash_for_each(vport->hash_table, bucket, cur, hnode)
+				hash_del(&cur->hnode);
+		vport->load_flag |= FC_ALLOW_VMID;
+		break;
+	default:
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+				 "8857 Invalid command code\n");
+	}
+}
+
+/**
+ * lpfc_vmid_cmd - Build and send a FDMI cmd to the specified NPort
+ * @vport: pointer to a host virtual N_Port data structure.
+ * @ndlp: ndlp to send FDMI cmd to (if NULL use FDMI_DID)
+ * cmdcode: FDMI command to send
+ * mask: Mask of HBA or PORT Attributes to send
+ *
+ * Builds and sends a FDMI command using the CT subsystem.
+ */
+int
+lpfc_vmid_cmd(struct lpfc_vport *vport,
+	      int cmdcode, struct lpfc_vmid *vmid)
+{
+	struct lpfc_hba *phba = vport->phba;
+	struct lpfc_dmabuf *mp, *bmp;
+	struct lpfc_sli_ct_request *ctreq;
+	struct ulp_bde64 *bpl;
+	u32 size;
+	u32 rsp_size;
+	u8 *data;
+	struct lpfc_vmid_rapp_ident_list *rap;
+	struct lpfc_vmid_dapp_ident_list *dap;
+	u8 retry = 0;
+	struct lpfc_nodelist *ndlp;
+
+	void (*cmpl)(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
+		     struct lpfc_iocbq *rspiocb);
+
+	ndlp = lpfc_findnode_did(vport, FDMI_DID);
+	if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
+		return 0;
+
+	cmpl = lpfc_cmpl_ct_cmd_vmid;
+
+	/* fill in BDEs for command */
+	/* Allocate buffer for command payload */
+	mp = kmalloc(sizeof(*mp), GFP_KERNEL);
+	if (!mp)
+		goto vmid_free_mp_exit;
+
+	mp->virt = lpfc_mbuf_alloc(phba, 0, &mp->phys);
+	if (!mp->virt)
+		goto vmid_free_mp_virt_exit;
+
+	/* Allocate buffer for Buffer ptr list */
+	bmp = kmalloc(sizeof(*bmp), GFP_KERNEL);
+	if (!bmp)
+		goto vmid_free_bmp_exit;
+
+	bmp->virt = lpfc_mbuf_alloc(phba, 0, &bmp->phys);
+	if (!bmp->virt)
+		goto vmid_free_bmp_virt_exit;
+
+	INIT_LIST_HEAD(&mp->list);
+	INIT_LIST_HEAD(&bmp->list);
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
+			 "3275 VMID Request Data: x%x x%x x%x\n",
+			 vport->fc_flag, vport->port_state, cmdcode);
+	ctreq = (struct lpfc_sli_ct_request *)mp->virt;
+	data = mp->virt;
+	/* First populate the CT_IU preamble */
+	memset(data, 0, LPFC_BPL_SIZE);
+	ctreq->RevisionId.bits.Revision = SLI_CT_REVISION;
+	ctreq->RevisionId.bits.InId = 0;
+
+	ctreq->FsType = SLI_CT_MANAGEMENT_SERVICE;
+	ctreq->FsSubType = SLI_CT_APP_SEV_Subtypes;
+
+	ctreq->CommandResponse.bits.CmdRsp = cpu_to_be16(cmdcode);
+	rsp_size = LPFC_BPL_SIZE;
+	size = 0;
+
+	switch (cmdcode) {
+	case SLI_CTAS_RAPP_IDENT:
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+				 "1329 RAPP_IDENT for %s\n", vmid->host_vmid);
+		ctreq->un.PortID = cpu_to_be32(vport->fc_myDID);
+		rap = (struct lpfc_vmid_rapp_ident_list *)
+			(DAPP_IDENT_OFFSET + data);
+		rap->no_of_objects = cpu_to_be32(1);
+		rap->obj[0].entity_id_len = vmid->vmid_len;
+		memcpy(rap->obj[0].entity_id, vmid->host_vmid, vmid->vmid_len);
+		size = RAPP_IDENT_OFFSET +
+			sizeof(struct lpfc_vmid_rapp_ident_list);
+		retry = 1;
+		break;
+
+	case SLI_CTAS_GALLAPPIA_ID:
+		ctreq->un.PortID = cpu_to_be32(vport->fc_myDID);
+		size = GALLAPPIA_ID_SIZE;
+		break;
+
+	case SLI_CTAS_DAPP_IDENT:
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+				 "1469 DAPP_IDENT for %s\n", vmid->host_vmid);
+		ctreq->un.PortID = cpu_to_be32(vport->fc_myDID);
+		dap = (struct lpfc_vmid_dapp_ident_list *)
+			(DAPP_IDENT_OFFSET + data);
+		dap->no_of_objects = cpu_to_be32(1);
+		dap->obj[0].entity_id_len = vmid->vmid_len;
+		memcpy(dap->obj[0].entity_id, vmid->host_vmid, vmid->vmid_len);
+		size = DAPP_IDENT_OFFSET +
+			sizeof(struct lpfc_vmid_dapp_ident_list);
+		write_lock(&vport->vmid_lock);
+		vmid->flag &= ~LPFC_VMID_REGISTERED;
+		write_unlock(&vport->vmid_lock);
+		retry = 1;
+		break;
+
+	case SLI_CTAS_DALLAPP_ID:
+		ctreq->un.PortID = cpu_to_be32(vport->fc_myDID);
+		size = DALLAPP_ID_SIZE;
+		break;
+
+	default:
+		lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+				 "7062 VMID cmdcode x%x not supported\n",
+				 cmdcode);
+		goto vmid_free_all_mem;
+	}
+
+	ctreq->CommandResponse.bits.Size = cpu_to_be16(rsp_size);
+
+	bpl = (struct ulp_bde64 *)bmp->virt;
+	bpl->addrHigh = putPaddrHigh(mp->phys);
+	bpl->addrLow = putPaddrLow(mp->phys);
+	bpl->tus.f.bdeFlags = 0;
+	bpl->tus.f.bdeSize = size;
+
+	/* The lpfc_ct_cmd/lpfc_get_req shall increment ndlp reference count
+	 * to hold ndlp reference for the corresponding callback function.
+	 */
+	if (!lpfc_ct_cmd(vport, mp, bmp, ndlp, cmpl, rsp_size, retry))
+		return 0;
+
+ vmid_free_all_mem:
+	lpfc_mbuf_free(phba, bmp->virt, bmp->phys);
+ vmid_free_bmp_virt_exit:
+	kfree(bmp);
+ vmid_free_bmp_exit:
+	lpfc_mbuf_free(phba, mp->virt, mp->phys);
+ vmid_free_mp_virt_exit:
+	kfree(mp);
+ vmid_free_mp_exit:
+
+	/* Issue CT request failed */
+	lpfc_printf_vlog(vport, KERN_DEBUG, LOG_DISCOVERY,
+			 "3276 VMID CT request failed Data: x%x\n", cmdcode);
+	return -EIO;
+}
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 10/13] lpfc: vmid: Appends the vmid in the wqe before sending
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (8 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 09/13] lpfc: vmid: Implements CT commands for appid Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 11/13] lpfc: vmid: Timeout implementation for vmid Muneendra Kumar
                   ` (2 subsequent siblings)
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch adds the vmid in wqe before sending out the request.
The type of vmid depends on the configured type and is checked before
being appended.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
Removed redudant code

v9:
No change

v8:
Modified the log messages

v7:
No change

v6:
No change

v5:
Modified the comments

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_sli.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index c7d0acd6c8ef..6555308cea7a 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -9766,6 +9766,8 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
 				*pcmd == ELS_CMD_RSCN_XMT ||
 				*pcmd == ELS_CMD_FDISC ||
 				*pcmd == ELS_CMD_LOGO ||
+				*pcmd == ELS_CMD_QFPA ||
+				*pcmd == ELS_CMD_UVEM ||
 				*pcmd == ELS_CMD_PLOGI)) {
 				bf_set(els_req64_sp, &wqe->els_req, 1);
 				bf_set(els_req64_sid, &wqe->els_req,
@@ -10328,6 +10330,18 @@ __lpfc_sli_issue_fcp_io_s4(struct lpfc_hba *phba, uint32_t ring_number,
 		bf_set(wqe_wqes, &wqe->generic.wqe_com, 0);
 	}
 
+	/* add the VMID tags as per switch response */
+	if (unlikely(piocb->iocb_flag & LPFC_IO_VMID)) {
+		if (phba->pport->vmid_priority_tagging) {
+			bf_set(wqe_ccpe, &wqe->fcp_iwrite.wqe_com, 1);
+			bf_set(wqe_ccp, &wqe->fcp_iwrite.wqe_com,
+					(piocb->vmid_tag.cs_ctl_vmid));
+		} else {
+			bf_set(wqe_appid, &wqe->fcp_iwrite.wqe_com, 1);
+			bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
+			wqe->words[31] = piocb->vmid_tag.app_id;
+		}
+	}
 	rc = lpfc_sli4_issue_wqe(phba, lpfc_cmd->hdwq, piocb);
 	return rc;
 }
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 11/13] lpfc: vmid: Timeout implementation for vmid
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (9 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 10/13] lpfc: vmid: Appends the vmid in the wqe before sending Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 12/13] lpfc: vmid: Adding qfpa and vmid timeout check in worker thread Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 13/13] lpfc: vmid: Introducing vmid in io path Muneendra Kumar
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch implements the timeout functionality for the vmid. After the
set time period of inactivity, the vmid is deregistered from the switch.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
No change

v9:
Modified code for use of hashtable

v8:
Fixed the uninitialized variable

v7:
No change

v6:
Added Forward declarations

v5:
No change

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_hbadisc.c | 105 +++++++++++++++++++++++++++++++
 drivers/scsi/lpfc/lpfc_init.c    |  40 ++++++++++++
 2 files changed, 145 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 04b6e18c5342..41a388aab1cf 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -72,6 +72,7 @@ static void lpfc_disc_flush_list(struct lpfc_vport *vport);
 static void lpfc_unregister_fcfi_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
 static int lpfc_fcf_inuse(struct lpfc_hba *);
 static void lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *, LPFC_MBOXQ_t *);
+static void lpfc_check_inactive_vmid(struct lpfc_hba *phba);
 
 static int
 lpfc_valid_xpt_node(struct lpfc_nodelist *ndlp)
@@ -234,6 +235,110 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport)
 	return;
 }
 
+/**
+ * lpfc_check_inactive_vmid_one - VMID inactivity checker for a vport
+ * @vport: Pointer to vport context object.
+ *
+ * This function checks for idle vmid entries related to a particular vport. If
+ * found unused/idle, it frees them accordingly.
+ **/
+static void lpfc_check_inactive_vmid_one(struct lpfc_vport *vport)
+{
+	u16 keep;
+	u32 difftime = 0, r, bucket;
+	u64 *lta;
+	int cpu;
+	struct lpfc_vmid *vmp;
+
+	write_lock(&vport->vmid_lock);
+
+	if (!vport->cur_vmid_cnt)
+		goto out;
+
+	/* iterate through the table */
+	hash_for_each(vport->hash_table, bucket, vmp, hnode) {
+		keep = 0;
+		if (vmp->flag & LPFC_VMID_REGISTERED) {
+			/* check if the particular vmid is in use */
+			/* for all available per cpu variable */
+			for_each_possible_cpu(cpu) {
+				/* if last access time is less than timeout */
+				lta = per_cpu_ptr(vmp->last_io_time, cpu);
+				if (!lta)
+					continue;
+				difftime = (jiffies) - (*lta);
+				if ((vport->vmid_inactivity_timeout *
+				     JIFFIES_PER_HR) > difftime) {
+					keep = 1;
+					break;
+				}
+			}
+
+			/* if none of the cpus have been used by the vm, */
+			/*  remove the entry if already registered */
+			if (!keep) {
+				/* mark the entry for deregistration */
+				vmp->flag = LPFC_VMID_DE_REGISTER;
+				write_unlock(&vport->vmid_lock);
+				if (vport->vmid_priority_tagging)
+					r = lpfc_vmid_uvem(vport, vmp, false);
+				else
+					r = lpfc_vmid_cmd(vport,
+							  SLI_CTAS_DAPP_IDENT,
+							  vmp);
+
+				/* decrement number of active vms and mark */
+				/* entry in slot as free */
+				write_lock(&vport->vmid_lock);
+				if (!r) {
+					struct lpfc_vmid *ht = vmp;
+
+					vport->cur_vmid_cnt--;
+					ht->flag = LPFC_VMID_SLOT_FREE;
+					free_percpu(ht->last_io_time);
+					ht->last_io_time = NULL;
+					hash_del(&ht->hnode);
+				}
+			}
+		}
+	}
+ out:
+	write_unlock(&vport->vmid_lock);
+}
+
+/**
+ * lpfc_check_inactive_vmid - VMID inactivity checker
+ * @phba: Pointer to hba context object.
+ *
+ * This function is called from the worker thread to determine if an entry in
+ * the vmid table can be released since there was no IO activity seen from that
+ * particular VM for the specified time. When this happens, the entry in the
+ * table is released and also the resources on the switch cleared.
+ **/
+
+static void lpfc_check_inactive_vmid(struct lpfc_hba *phba)
+{
+	struct lpfc_vport *vport;
+	struct lpfc_vport **vports;
+	int i;
+
+	vports = lpfc_create_vport_work_array(phba);
+	if (!vports)
+		return;
+
+	for (i = 0; i <= phba->max_vports; i++) {
+		if ((!vports[i]) && (i == 0))
+			vport = phba->pport;
+		else
+			vport = vports[i];
+		if (!vport)
+			break;
+
+		lpfc_check_inactive_vmid_one(vport);
+	}
+	lpfc_destroy_vport_work_array(phba, vports);
+}
+
 /**
  * lpfc_dev_loss_tmo_handler - Remote node devloss timeout handler
  * @ndlp: Pointer to remote node object.
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index d6434e4ffa20..c82b10f70361 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -4845,6 +4845,42 @@ lpfc_sli4_fcf_redisc_wait_tmo(struct timer_list *t)
 	lpfc_worker_wake_up(phba);
 }
 
+/**
+ * lpfc_vmid_poll - VMID timeout detection
+ * @ptr: Map to lpfc_hba data structure pointer.
+ *
+ * This routine is invoked when there is no IO on by a VM for the specified
+ * amount of time. When this situation is detected, the VMID has to be
+ * deregistered from the switch and all the local resources freed. The VMID
+ * will be reassigned to the VM once the IO begins.
+ **/
+static void
+lpfc_vmid_poll(struct timer_list *t)
+{
+	struct lpfc_hba *phba = from_timer(phba, t, inactive_vmid_poll);
+	u32 wake_up = 0;
+
+	/* check if there is a need to issue QFPA */
+	if (phba->pport->vmid_priority_tagging) {
+		wake_up = 1;
+		phba->pport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA;
+	}
+
+	/* Is the vmid inactivity timer enabled */
+	if (phba->pport->vmid_inactivity_timeout ||
+	    phba->pport->load_flag & FC_DEREGISTER_ALL_APP_ID) {
+		wake_up = 1;
+		phba->pport->work_port_events |= WORKER_CHECK_INACTIVE_VMID;
+	}
+
+	if (wake_up)
+		lpfc_worker_wake_up(phba);
+
+	/* restart the timer for the next iteration */
+	mod_timer(&phba->inactive_vmid_poll, jiffies + msecs_to_jiffies(1000 *
+							LPFC_VMID_TIMER));
+}
+
 /**
  * lpfc_sli4_parse_latt_fault - Parse sli4 link-attention link fault code
  * @phba: pointer to lpfc hba data structure.
@@ -6693,6 +6729,10 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 	phba->hbqs[LPFC_ELS_HBQ].hbq_alloc_buffer = lpfc_sli4_rb_alloc;
 	phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer = lpfc_sli4_rb_free;
 
+	/* for VMID idle timeout if VMID is enabled */
+	if (lpfc_is_vmid_enabled(phba))
+		timer_setup(&phba->inactive_vmid_poll, lpfc_vmid_poll, 0);
+
 	/*
 	 * Initialize the SLI Layer to run with lpfc SLI4 HBAs.
 	 */
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 12/13] lpfc: vmid: Adding qfpa and vmid timeout check in worker thread
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (10 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 11/13] lpfc: vmid: Timeout implementation for vmid Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  2021-06-08  4:35 ` [PATCH v11 13/13] lpfc: vmid: Introducing vmid in io path Muneendra Kumar
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

This patch add the periodic check for issuing of qfpa command and vmid
timeout in the worker thread. The inactivity timeout check is added via
the timer function.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
No change

v9:
No change

v8:
checked the function return value

v7:
No change

v6:
Added Forward declarations and removed unused variable

v5:
No change

v4:
No change

v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc_hbadisc.c | 43 ++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 41a388aab1cf..8ffd2727f47f 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -73,6 +73,7 @@ static void lpfc_unregister_fcfi_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
 static int lpfc_fcf_inuse(struct lpfc_hba *);
 static void lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *, LPFC_MBOXQ_t *);
 static void lpfc_check_inactive_vmid(struct lpfc_hba *phba);
+static void lpfc_check_vmid_qfpa_issue(struct lpfc_hba *phba);
 
 static int
 lpfc_valid_xpt_node(struct lpfc_nodelist *ndlp)
@@ -428,6 +429,32 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
 	return fcf_inuse;
 }
 
+static void lpfc_check_vmid_qfpa_issue(struct lpfc_hba *phba)
+{
+	struct lpfc_vport *vport;
+	struct lpfc_vport **vports;
+	int i;
+
+	vports = lpfc_create_vport_work_array(phba);
+	if (!vports)
+		return;
+
+	for (i = 0; i <= phba->max_vports; i++) {
+		if ((!vports[i]) && (i == 0))
+			vport = phba->pport;
+		else
+			vport = vports[i];
+		if (!vport)
+			break;
+
+		if (vport->vmid_flag & LPFC_VMID_ISSUE_QFPA) {
+			if (!lpfc_issue_els_qfpa(vport))
+				vport->vmid_flag &= ~LPFC_VMID_ISSUE_QFPA;
+		}
+	}
+	lpfc_destroy_vport_work_array(phba, vports);
+}
+
 /**
  * lpfc_sli4_post_dev_loss_tmo_handler - SLI4 post devloss timeout handler
  * @phba: Pointer to hba context object.
@@ -748,6 +775,22 @@ lpfc_work_done(struct lpfc_hba *phba)
 	if (ha_copy & HA_LATT)
 		lpfc_handle_latt(phba);
 
+	/* Handle VMID Events */
+	if (lpfc_is_vmid_enabled(phba)) {
+		if (phba->pport->work_port_events &
+		    WORKER_CHECK_VMID_ISSUE_QFPA) {
+			lpfc_check_vmid_qfpa_issue(phba);
+			phba->pport->work_port_events &=
+				~WORKER_CHECK_VMID_ISSUE_QFPA;
+		}
+		if (phba->pport->work_port_events &
+		    WORKER_CHECK_INACTIVE_VMID) {
+			lpfc_check_inactive_vmid(phba);
+			phba->pport->work_port_events &=
+			    ~WORKER_CHECK_INACTIVE_VMID;
+		}
+	}
+
 	/* Process SLI4 events */
 	if (phba->pci_dev_grp == LPFC_PCI_DEV_OC) {
 		if (phba->hba_flag & HBA_RRQ_ACTIVE)
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* [PATCH v11 13/13] lpfc: vmid: Introducing vmid in io path.
  2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
                   ` (11 preceding siblings ...)
  2021-06-08  4:35 ` [PATCH v11 12/13] lpfc: vmid: Adding qfpa and vmid timeout check in worker thread Muneendra Kumar
@ 2021-06-08  4:35 ` Muneendra Kumar
  12 siblings, 0 replies; 15+ messages in thread
From: Muneendra Kumar @ 2021-06-08  4:35 UTC (permalink / raw)
  To: linux-block, linux-scsi, tj, linux-nvme, hare
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>

The patch introduces the vmid in the io path. It checks if the vmid is
enabled and if io belongs to a vm or not and acts accordingly. Other
supporing APIs are also included in the patch.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>

---
v11:
No change

v10:
Remove redundant code and function name correction

v9:
Added changes related to locking and new hashtable implementation

v8:
Added proper error codes
updated logic while handling vmid

v7:
No change

v6:
No change

v5:
No change

v4:
No change

v3:
Replaced blkcg_get_app_identifier with blkcg_get_fc_appid

v2:
Ported the patch on top of 5.10/scsi-queue
Added a fix for issuing QFPA command which was not included in the
last submit
---
 drivers/scsi/lpfc/lpfc_scsi.c | 174 ++++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 65637d85f9bb..1cf271bee126 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -5296,6 +5296,160 @@ static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
 	}
 }
 
+/*
+ * lpfc_vmid_get_appid- get the vmid associated with the uuid
+ * @vport: The virtual port for which this call is being executed.
+ * @uuid: uuid associated with the VE
+ * @cmd: address of scsi cmmd descriptor
+ * @tag: VMID tag
+ * Returns status of the function
+ */
+static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct
+			       scsi_cmnd * cmd, union lpfc_vmid_io_tag *tag)
+{
+	struct lpfc_vmid *vmp = NULL;
+	int hash, len, rc, i;
+
+	/* check if QFPA is complete */
+	if (lpfc_vmid_is_type_priority_tag(vport) && !(vport->vmid_flag &
+	      LPFC_VMID_QFPA_CMPL)) {
+		vport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA;
+		return -EAGAIN;
+	}
+
+	/* search if the uuid has already been mapped to the vmid */
+	len = strlen(uuid);
+	hash = lpfc_vmid_hash_fn(uuid, len);
+
+	/* search for the VMID in the table */
+	read_lock(&vport->vmid_lock);
+	vmp = lpfc_get_vmid_from_hashtable(vport, hash, uuid);
+
+	/* if found, check if its already registered  */
+	if (vmp  && vmp->flag & LPFC_VMID_REGISTERED) {
+		read_unlock(&vport->vmid_lock);
+		lpfc_vmid_update_entry(vport, cmd, vmp, tag);
+		rc = 0;
+	} else if (vmp && (vmp->flag & LPFC_VMID_REQ_REGISTER ||
+			   vmp->flag & LPFC_VMID_DE_REGISTER)) {
+		/* else if register or dereg request has already been sent */
+		/* Hence vmid tag will not be added for this IO */
+		read_unlock(&vport->vmid_lock);
+		rc = -EBUSY;
+	} else {
+		/* The vmid was not found in the hashtable. At this point, */
+		/* drop the read lock first before proceeding further */
+		read_unlock(&vport->vmid_lock);
+		/* start the process to obtain one as per the */
+		/* type of the vmid indicated */
+		write_lock(&vport->vmid_lock);
+		vmp = lpfc_get_vmid_from_hashtable(vport, hash, uuid);
+
+		/* while the read lock was released, in case the entry was */
+		/* added by other context or is in process of being added */
+		if (vmp && vmp->flag & LPFC_VMID_REGISTERED) {
+			lpfc_vmid_update_entry(vport, cmd, vmp, tag);
+			write_unlock(&vport->vmid_lock);
+			return 0;
+		} else if (vmp && vmp->flag & LPFC_VMID_REQ_REGISTER) {
+			write_unlock(&vport->vmid_lock);
+			return -EBUSY;
+		}
+
+		/* else search and allocate a free slot in the hash table */
+		if (vport->cur_vmid_cnt < vport->max_vmid) {
+			for (i = 0; i < vport->max_vmid; i++) {
+				vmp = vport->vmid + i;
+				if (vmp->flag == LPFC_VMID_SLOT_FREE)
+					break;
+			}
+			if (i == vport->max_vmid)
+				vmp = NULL;
+		} else {
+			vmp = NULL;
+		}
+
+		if (!vmp) {
+			write_unlock(&vport->vmid_lock);
+			return -ENOMEM;
+		}
+
+		/* Add the vmid and register  */
+		lpfc_put_vmid_in_hashtable(vport, hash, vmp);
+		vmp->vmid_len = len;
+		memcpy(vmp->host_vmid, uuid, vmp->vmid_len);
+		vmp->io_rd_cnt = 0;
+		vmp->io_wr_cnt = 0;
+		vmp->flag = LPFC_VMID_SLOT_USED;
+
+		vmp->delete_inactive =
+			vport->vmid_inactivity_timeout ? 1 : 0;
+
+		/* if type priority tag, get next available vmid */
+		if (lpfc_vmid_is_type_priority_tag(vport))
+			lpfc_vmid_assign_cs_ctl(vport, vmp);
+
+		/* allocate the per cpu variable for holding */
+		/* the last access time stamp only if vmid is enabled */
+		if (!vmp->last_io_time)
+			vmp->last_io_time = __alloc_percpu(sizeof(u64),
+							   __alignof__(struct
+							   lpfc_vmid));
+		if (!vmp->last_io_time) {
+			hash_del(&vmp->hnode);
+			vmp->flag = LPFC_VMID_SLOT_FREE;
+			write_unlock(&vport->vmid_lock);
+			return -EIO;
+		}
+
+		write_unlock(&vport->vmid_lock);
+
+		/* complete transaction with switch */
+		if (lpfc_vmid_is_type_priority_tag(vport))
+			rc = lpfc_vmid_uvem(vport, vmp, true);
+		else
+			rc = lpfc_vmid_cmd(vport, SLI_CTAS_RAPP_IDENT, vmp);
+		if (!rc) {
+			write_lock(&vport->vmid_lock);
+			vport->cur_vmid_cnt++;
+			vmp->flag |= LPFC_VMID_REQ_REGISTER;
+			write_unlock(&vport->vmid_lock);
+		} else {
+			write_lock(&vport->vmid_lock);
+			hash_del(&vmp->hnode);
+			vmp->flag = LPFC_VMID_SLOT_FREE;
+			free_percpu(vmp->last_io_time);
+			write_unlock(&vport->vmid_lock);
+			return -EIO;
+		}
+
+		/* finally, enable the idle timer once */
+		if (!(vport->phba->pport->vmid_flag & LPFC_VMID_TIMER_ENBLD)) {
+			mod_timer(&vport->phba->inactive_vmid_poll,
+				  jiffies +
+				  msecs_to_jiffies(1000 * LPFC_VMID_TIMER));
+			vport->phba->pport->vmid_flag |= LPFC_VMID_TIMER_ENBLD;
+		}
+	}
+	return rc;
+}
+
+/*
+ * lpfc_is_command_vm_io - get the uuid from blk cgroup
+ * @cmd:Pointer to scsi_cmnd data structure
+ * Returns uuid if present if not null
+ */
+static char *lpfc_is_command_vm_io(struct scsi_cmnd *cmd)
+{
+	char *uuid = NULL;
+
+	if (cmd->request) {
+		if (cmd->request->bio)
+			uuid = blkcg_get_fc_appid(cmd->request->bio);
+	}
+	return uuid;
+}
+
 /**
  * lpfc_queuecommand - scsi_host_template queuecommand entry point
  * @shost: kernel scsi host pointer.
@@ -5321,6 +5475,7 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
 	int err, idx;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	uint64_t start = 0L;
+	u8 *uuid = NULL;
 
 	if (phba->ktime_on)
 		start = ktime_get_ns();
@@ -5448,6 +5603,25 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
 	}
 
 
+	/* check the necessary and sufficient condition to support VMID */
+	if (lpfc_is_vmid_enabled(phba) &&
+	    (ndlp->vmid_support ||
+	     phba->pport->vmid_priority_tagging ==
+	     LPFC_VMID_PRIO_TAG_ALL_TARGETS)) {
+		/* is the IO generated by a VM, get the associated virtual */
+		/* entity id */
+		uuid = lpfc_is_command_vm_io(cmnd);
+
+		if (uuid) {
+			err = lpfc_vmid_get_appid(vport, uuid, cmnd,
+				(union lpfc_vmid_io_tag *)
+					&lpfc_cmd->cur_iocbq.vmid_tag);
+			if (!err)
+				lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_VMID;
+		}
+	}
+
+	atomic_inc(&ndlp->cmd_pending);
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
 		this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
-- 
2.26.2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: [PATCH v11 08/13] lpfc: vmid: Functions to manage vmids
  2021-06-08  4:35 ` [PATCH v11 08/13] lpfc: vmid: Functions to manage vmids Muneendra Kumar
@ 2021-06-08 13:09   ` Hannes Reinecke
  0 siblings, 0 replies; 15+ messages in thread
From: Hannes Reinecke @ 2021-06-08 13:09 UTC (permalink / raw)
  To: Muneendra Kumar, linux-block, linux-scsi, tj, linux-nvme
  Cc: jsmart2021, emilne, mkumar, Gaurav Srivastava

On 6/8/21 6:35 AM, Muneendra Kumar wrote:
> From: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
> 
> This patch contains the routines to save, retrieve and remove the vmids
> from the data structure. A hash table is used to save the vmids and
> the corresponding UUIDs associated with the application/VMs.
> 
> Signed-off-by: Gaurav Srivastava  <gaurav.srivastava@broadcom.com>
> Signed-off-by: James Smart <jsmart2021@gmail.com>
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		           Kernel Storage Architect
hare@suse.de			                  +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), GF: Felix Imendörffer

^ permalink raw reply	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2021-06-08 13:09 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-08  4:35 [PATCH v11 00/13] blkcg:Support to track FC storage blk io traffic Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 01/13] cgroup: Added cgroup_get_from_id Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 02/13] blkcg: Added a app identifier support for blkcg Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 03/13] nvme: Added a newsysfs attribute appid_store Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 04/13] lpfc: vmid: Add the datastructure for supporting VMID in lpfc Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 05/13] lpfc: vmid: VMID params initialization Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 06/13] lpfc: vmid: Add support for vmid in mailbox command, does vmid resource allocation and vmid cleanup Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 07/13] lpfc: vmid: Implements ELS commands for appid patch Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 08/13] lpfc: vmid: Functions to manage vmids Muneendra Kumar
2021-06-08 13:09   ` Hannes Reinecke
2021-06-08  4:35 ` [PATCH v11 09/13] lpfc: vmid: Implements CT commands for appid Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 10/13] lpfc: vmid: Appends the vmid in the wqe before sending Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 11/13] lpfc: vmid: Timeout implementation for vmid Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 12/13] lpfc: vmid: Adding qfpa and vmid timeout check in worker thread Muneendra Kumar
2021-06-08  4:35 ` [PATCH v11 13/13] lpfc: vmid: Introducing vmid in io path Muneendra Kumar

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