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Date: Wed, 19 Nov 2008 17:37:11 -0800
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: "Linux-iSCSI.org Target Dev"
<linux-iscsi-target-dev@...glegroups.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>
Subject: [PATCH] Allow $STORAGE_OBJECT/attrib/queue_depth for virtual
subsystem plugins (RAMDISK, IBLOCK, FILEIO) beyond default hardcoded value.
>>From 17e6a1e8dac7fceb2507ccd690206564b5bdf08a Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@...ux-iscsi.org>
Date: Wed, 19 Nov 2008 11:52:44 -0800
Subject: [PATCH] Allow $STORAGE_OBJECT/attrib/queue_depth for virtual subsystem plugins (RAMDISK, IBLOCK, FILEIO)
beyond default hardcoded value.
Previously, /sys/kernel/config/target/core/$PLUGIN_HBA/$STORAGE_OBJECT/attrib/queue_depth
was only able to change the value below the return of se_subsystem_api_t->get_queue_depth().
This patch changes se_dev_set_queue_depth() to allow all non TRANSPORT_PLUGIN_PHBA_PDEV type
plugins (eg: non PSCSI) to increase the device object's queue_depth up to
se_subsystem_api_t->get_max_queue_depth().
This patch also adds the se_subsystem_api_t->get_max_queue_depth() to RAMDISK, IBLOCK and FILEIO
subsystem plugins.
Forward port to v3.0 Target_Core_Mod/ConfigFS from v2.9-STABLE r404
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/lio-core/target_core_device.c | 28 +++++++++++++++++++++++-----
drivers/lio-core/target_core_file.c | 5 +++++
drivers/lio-core/target_core_file.h | 3 +++
drivers/lio-core/target_core_iblock.c | 5 +++++
drivers/lio-core/target_core_iblock.h | 3 +++
drivers/lio-core/target_core_rd.c | 5 +++++
drivers/lio-core/target_core_rd.h | 4 ++++
drivers/lio-core/target_core_transport.h | 4 ++++
8 files changed, 52 insertions(+), 5 deletions(-)
diff --git a/drivers/lio-core/target_core_device.c b/drivers/lio-core/target_core_device.c
index 77462a9..974574a 100644
--- a/drivers/lio-core/target_core_device.c
+++ b/drivers/lio-core/target_core_device.c
@@ -461,11 +461,29 @@ extern int se_dev_set_queue_depth (se_device_t *dev, u32 queue_depth)
TRACE_ERROR("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
return(-1);
}
- if (queue_depth > TRANSPORT(dev)->get_queue_depth(dev)) {
- TRACE_ERROR("dev[%p]: Passed queue_depth: %u exceeds"
- " LIO-Core/SE_Device TCQ: %u\n", dev, queue_depth,
- TRANSPORT(dev)->get_queue_depth(dev));
- return(-1);
+
+ if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
+ if (queue_depth > TRANSPORT(dev)->get_queue_depth(dev)) {
+ TRACE_ERROR("dev[%p]: Passed queue_depth: %u exceeds"
+ " LIO-Core/SE_Device TCQ: %u\n", dev, queue_depth,
+ TRANSPORT(dev)->get_queue_depth(dev));
+ return(-1);
+ }
+ } else {
+ if (queue_depth > TRANSPORT(dev)->get_queue_depth(dev)) {
+ if (!(TRANSPORT(dev)->get_max_queue_depth)) {
+ TRACE_ERROR("dev[%p]: Unable to locate "
+ "get_max_queue_depth() function"
+ " pointer\n", dev);
+ return(-1);
+ }
+ if (queue_depth > TRANSPORT(dev)->get_max_queue_depth(dev)) {
+ TRACE_ERROR("dev[%p]: Passed queue_depth: %u exceeds"
+ " LIO-Core/SE_Device MAX TCQ: %u\n", dev, queue_depth,
+ TRANSPORT(dev)->get_max_queue_depth(dev));
+ return(-1);
+ }
+ }
}
DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
diff --git a/drivers/lio-core/target_core_file.c b/drivers/lio-core/target_core_file.c
index 9bd83d4..8c7c202 100644
--- a/drivers/lio-core/target_core_file.c
+++ b/drivers/lio-core/target_core_file.c
@@ -1251,6 +1251,11 @@ extern u32 fd_get_queue_depth (se_device_t *dev)
return(FD_DEVICE_QUEUE_DEPTH);
}
+extern u32 fd_get_max_queue_depth (se_device_t *dev)
+{
+ return(FD_MAX_DEVICE_QUEUE_DEPTH);
+}
+
/* fd_get_non_SG(): (Part of se_subsystem_api_t template)
*
*
diff --git a/drivers/lio-core/target_core_file.h b/drivers/lio-core/target_core_file.h
index aba8f2d..7b7f59d 100644
--- a/drivers/lio-core/target_core_file.h
+++ b/drivers/lio-core/target_core_file.h
@@ -35,6 +35,7 @@
#define FD_MAX_DEV_NAME 256
#define FD_HBA_QUEUE_DEPTH 256 /* Maximum queuedepth for the FILEIO HBA */
#define FD_DEVICE_QUEUE_DEPTH 32
+#define FD_MAX_DEVICE_QUEUE_DEPTH 128
#define FD_BLOCKSIZE 512
#define FD_MAX_SECTORS 1024
@@ -80,6 +81,7 @@ extern u32 fd_get_device_type (se_device_t *);
extern u32 fd_get_dma_length (u32, se_device_t *);
extern u32 fd_get_max_sectors (se_device_t *);
extern u32 fd_get_queue_depth (se_device_t *);
+extern u32 fd_get_max_queue_depth (se_device_t *);
extern unsigned char *fd_get_non_SG (se_task_t *);
extern struct scatterlist *fd_get_SG (se_task_t *);
extern u32 fd_get_SG_count (se_task_t *);
@@ -193,6 +195,7 @@ se_subsystem_spc_t fileio_template_spc = ISCSI_FILEIO_SPC;
get_evpd_sn: fd_get_evpd_sn, \
get_max_sectors: fd_get_max_sectors, \
get_queue_depth: fd_get_queue_depth, \
+ get_max_queue_depth: fd_get_max_queue_depth, \
get_non_SG: fd_get_non_SG, \
get_SG: fd_get_SG, \
get_SG_count: fd_get_SG_count, \
diff --git a/drivers/lio-core/target_core_iblock.c b/drivers/lio-core/target_core_iblock.c
index 5ae04d1..1794806 100644
--- a/drivers/lio-core/target_core_iblock.c
+++ b/drivers/lio-core/target_core_iblock.c
@@ -901,6 +901,11 @@ extern u32 iblock_get_queue_depth (se_device_t *dev)
return(IBLOCK_DEVICE_QUEUE_DEPTH);
}
+extern u32 iblock_get_max_queue_depth (se_device_t *dev)
+{
+ return(IBLOCK_MAX_DEVICE_QUEUE_DEPTH);
+}
+
extern unsigned char *iblock_get_non_SG (se_task_t *task)
{
return((unsigned char *)task->iscsi_cmd->t_task->t_task_buf);
diff --git a/drivers/lio-core/target_core_iblock.h b/drivers/lio-core/target_core_iblock.h
index d0d8da1..3a2b910 100644
--- a/drivers/lio-core/target_core_iblock.h
+++ b/drivers/lio-core/target_core_iblock.h
@@ -34,6 +34,7 @@
#define IBLOCK_MAX_SECTORS 128
#define IBLOCK_HBA_QUEUE_DEPTH 512
#define IBLOCK_DEVICE_QUEUE_DEPTH 32
+#define IBLOCK_MAX_DEVICE_QUEUE_DEPTH 128
#define IBLOCK_MAX_CDBS 16
#define IBLOCK_LBA_SHIFT 9
@@ -76,6 +77,7 @@ extern u32 iblock_get_device_type (se_device_t *);
extern u32 iblock_get_dma_length (u32, se_device_t *);
extern u32 iblock_get_max_sectors (se_device_t *);
extern u32 iblock_get_queue_depth (se_device_t *);
+extern u32 iblock_get_max_queue_depth (se_device_t *);
extern unsigned char *iblock_get_non_SG (se_task_t *);
extern struct scatterlist *iblock_get_SG (se_task_t *);
extern u32 iblock_get_SG_count (se_task_t *);
@@ -168,6 +170,7 @@ se_subsystem_spc_t iblock_template_spc = ISCSI_IBLOCK_SPC;
get_evpd_sn: iblock_get_evpd_sn, \
get_max_sectors: iblock_get_max_sectors, \
get_queue_depth: iblock_get_queue_depth, \
+ get_max_queue_depth: iblock_get_max_queue_depth, \
get_non_SG: iblock_get_non_SG, \
get_SG: iblock_get_SG, \
get_SG_count: iblock_get_SG_count, \
diff --git a/drivers/lio-core/target_core_rd.c b/drivers/lio-core/target_core_rd.c
index 135999c..3c268ca 100644
--- a/drivers/lio-core/target_core_rd.c
+++ b/drivers/lio-core/target_core_rd.c
@@ -1382,6 +1382,11 @@ extern u32 rd_get_queue_depth (se_device_t *dev)
return(RD_DEVICE_QUEUE_DEPTH);
}
+extern u32 rd_get_max_queue_depth (se_device_t *dev)
+{
+ return(RD_MAX_DEVICE_QUEUE_DEPTH);
+}
+
/* rd_get_non_SG(): (Part of se_subsystem_api_t template)
*
*
diff --git a/drivers/lio-core/target_core_rd.h b/drivers/lio-core/target_core_rd.h
index 829c568..165ecad 100644
--- a/drivers/lio-core/target_core_rd.h
+++ b/drivers/lio-core/target_core_rd.h
@@ -37,6 +37,7 @@
#define RD_MAX_ALLOCATION_SIZE 65536 /* Largest piece of memory kmalloc can allocate */
#define RD_HBA_QUEUE_DEPTH 256 /* Maximum queuedepth for the Ramdisk HBA */
#define RD_DEVICE_QUEUE_DEPTH 32
+#define RD_MAX_DEVICE_QUEUE_DEPTH 128
#define RD_BLOCKSIZE 512
#define RD_MAX_SECTORS 1024
@@ -88,6 +89,7 @@ extern u32 rd_get_device_type (se_device_t *);
extern u32 rd_get_dma_length (u32, se_device_t *);
extern u32 rd_get_max_sectors (se_device_t *);
extern u32 rd_get_queue_depth (se_device_t *);
+extern u32 rd_get_max_queue_depth (se_device_t *);
extern unsigned char *rd_get_non_SG (se_task_t *);
extern struct scatterlist *rd_get_SG (se_task_t *);
extern u32 rd_get_SG_count (se_task_t *);
@@ -188,6 +190,7 @@ se_subsystem_spc_t rd_template_spc = ISCSI_RD_SPC;
get_evpd_sn: rd_get_evpd_sn, \
get_max_sectors: rd_get_max_sectors, \
get_queue_depth: rd_get_queue_depth, \
+ get_max_queue_depth: rd_get_max_queue_depth, \
do_se_mem_map: rd_DIRECT_do_se_mem_map, \
get_non_SG: rd_get_non_SG, \
get_SG: rd_get_SG, \
@@ -231,6 +234,7 @@ se_subsystem_api_t rd_dr_template = ISCSI_RD_DR;
get_evpd_sn: rd_get_evpd_sn, \
get_max_sectors: rd_get_max_sectors, \
get_queue_depth: rd_get_queue_depth, \
+ get_max_queue_depth: rd_get_max_queue_depth, \
get_non_SG: rd_get_non_SG, \
get_SG: rd_get_SG, \
get_SG_count: rd_get_SG_count, \
diff --git a/drivers/lio-core/target_core_transport.h b/drivers/lio-core/target_core_transport.h
index 909050e..c2fd11a 100644
--- a/drivers/lio-core/target_core_transport.h
+++ b/drivers/lio-core/target_core_transport.h
@@ -405,6 +405,10 @@ typedef struct se_subsystem_api_s {
*/
__u32 (*get_queue_depth)(se_device_t *);
/*
+ * get_max_queue_depth():
+ */
+ __u32 (*get_max_queue_depth)(se_device_t *);
+ /*
* do_se_mem_map():
*/
int (*do_se_mem_map)(se_task_t *, struct list_head *, void *, se_mem_t *, se_mem_t **, u32 *, u32 *);
--
1.5.4.1
--
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