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Date: Thu, 19 May 2011 20:19:14 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: linux-kernel <linux-kernel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>,
James Bottomley <James.Bottomley@...senPartnership.com>
Cc: Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Andy Grover <agrover@...hat.com>,
Mike Christie <michaelc@...wisc.edu>,
Boaz Harrosh <bharrosh@...asas.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Martin Svec <martin.svec@...er.cz>,
Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 6/6] target: Convert TASK_ATTR to scsi_tcq.h definitions
From: Nicholas Bellinger <nab@...ux-iscsi.org>
This patch converts target core and follwing scsi-misc upstream fabric
modules to use include/scsi/scsi_tcq.h includes for SIMPLE, HEAD_OF_QUEUE
and ORDERED SCSI tasks instead of scsi/libsas.h with TASK_ATTR*
*) tcm_loop: Convert tcm_loop_allocate_core_cmd() + tcm_loop_device_reset() to
scsi_tcq.h
*) tcm_fc: Convert ft_send_cmd() from FCP_PTA_* to scsi_tcq.h
Reported-by: Christoph Hellwig <hch@...radead.org>
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/target/loopback/tcm_loop.c | 12 ++++++------
drivers/target/target_core_pscsi.c | 4 ++--
drivers/target/target_core_transport.c | 22 +++++++++++-----------
drivers/target/tcm_fc/tfc_cmd.c | 20 +++++++++++++++++++-
include/scsi/scsi_tcq.h | 1 +
5 files changed, 39 insertions(+), 20 deletions(-)
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 09681ba..dee2a2c 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -31,7 +31,7 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
-#include <scsi/libsas.h> /* For TASK_ATTR_* */
+#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
#include <target/target_core_transport.h>
@@ -95,17 +95,17 @@ static struct se_cmd *tcm_loop_allocate_core_cmd(
if (sc->device->tagged_supported) {
switch (sc->tag) {
case HEAD_OF_QUEUE_TAG:
- sam_task_attr = TASK_ATTR_HOQ;
+ sam_task_attr = MSG_HEAD_TAG;
break;
case ORDERED_QUEUE_TAG:
- sam_task_attr = TASK_ATTR_ORDERED;
+ sam_task_attr = MSG_ORDERED_TAG;
break;
default:
- sam_task_attr = TASK_ATTR_SIMPLE;
+ sam_task_attr = MSG_SIMPLE_TAG;
break;
}
} else
- sam_task_attr = TASK_ATTR_SIMPLE;
+ sam_task_attr = MSG_SIMPLE_TAG;
/*
* Initialize struct se_cmd descriptor from target_core_mod infrastructure
@@ -379,7 +379,7 @@ static int tcm_loop_device_reset(struct scsi_cmnd *sc)
* Initialize struct se_cmd descriptor from target_core_mod infrastructure
*/
transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0,
- DMA_NONE, TASK_ATTR_SIMPLE,
+ DMA_NONE, MSG_SIMPLE_TAG,
&tl_cmd->tl_sense_buf[0]);
/*
* Allocate the LUN_RESET TMR
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 7ff6a35..331d423 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -41,7 +41,7 @@
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
-#include <scsi/libsas.h> /* For TASK_ATTR_* */
+#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
@@ -911,7 +911,7 @@ static int pscsi_do_task(struct se_task *task)
* descriptor
*/
blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, pt->pscsi_req,
- (task->task_se_cmd->sam_task_attr == TASK_ATTR_HOQ),
+ (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG),
pscsi_req_done);
return PYX_TRANSPORT_SENT_TO_TRANSPORT;
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index beaf8fa..5b1ce81 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -42,7 +42,7 @@
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
-#include <scsi/libsas.h> /* For TASK_ATTR_* */
+#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
@@ -1074,7 +1074,7 @@ static inline int transport_add_task_check_sam_attr(
* head of the struct se_device->execute_task_list, and task_prev
* after that for each subsequent task
*/
- if (task->task_se_cmd->sam_task_attr == TASK_ATTR_HOQ) {
+ if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) {
list_add(&task->t_execute_list,
(task_prev != NULL) ?
&task_prev->t_execute_list :
@@ -1873,7 +1873,7 @@ static int transport_check_alloc_task_attr(struct se_cmd *cmd)
if (SE_DEV(cmd)->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
return 0;
- if (cmd->sam_task_attr == TASK_ATTR_ACA) {
+ if (cmd->sam_task_attr == MSG_ACA_TAG) {
DEBUG_STA("SAM Task Attribute ACA"
" emulation is not supported\n");
return -1;
@@ -2517,7 +2517,7 @@ static inline int transport_execute_task_attr(struct se_cmd *cmd)
* Check for the existence of HEAD_OF_QUEUE, and if true return 1
* to allow the passed struct se_cmd list of tasks to the front of the list.
*/
- if (cmd->sam_task_attr == TASK_ATTR_HOQ) {
+ if (cmd->sam_task_attr == MSG_HEAD_TAG) {
atomic_inc(&SE_DEV(cmd)->dev_hoq_count);
smp_mb__after_atomic_inc();
DEBUG_STA("Added HEAD_OF_QUEUE for CDB:"
@@ -2525,7 +2525,7 @@ static inline int transport_execute_task_attr(struct se_cmd *cmd)
T_TASK(cmd)->t_task_cdb[0],
cmd->se_ordered_id);
return 1;
- } else if (cmd->sam_task_attr == TASK_ATTR_ORDERED) {
+ } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) {
spin_lock(&SE_DEV(cmd)->ordered_cmd_lock);
list_add_tail(&cmd->se_ordered_list,
&SE_DEV(cmd)->ordered_cmd_list);
@@ -3424,7 +3424,7 @@ static int transport_generic_cmd_sequencer(
* See spc4r17 section 5.3
*/
if (SE_DEV(cmd)->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
- cmd->sam_task_attr = TASK_ATTR_HOQ;
+ cmd->sam_task_attr = MSG_HEAD_TAG;
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
break;
case READ_BUFFER:
@@ -3632,7 +3632,7 @@ static int transport_generic_cmd_sequencer(
* See spc4r17 section 5.3
*/
if (SE_DEV(cmd)->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
- cmd->sam_task_attr = TASK_ATTR_HOQ;
+ cmd->sam_task_attr = MSG_HEAD_TAG;
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB;
break;
default:
@@ -3790,21 +3790,21 @@ static void transport_complete_task_attr(struct se_cmd *cmd)
struct se_cmd *cmd_p, *cmd_tmp;
int new_active_tasks = 0;
- if (cmd->sam_task_attr == TASK_ATTR_SIMPLE) {
+ if (cmd->sam_task_attr == MSG_SIMPLE_TAG) {
atomic_dec(&dev->simple_cmds);
smp_mb__after_atomic_dec();
dev->dev_cur_ordered_id++;
DEBUG_STA("Incremented dev->dev_cur_ordered_id: %u for"
" SIMPLE: %u\n", dev->dev_cur_ordered_id,
cmd->se_ordered_id);
- } else if (cmd->sam_task_attr == TASK_ATTR_HOQ) {
+ } else if (cmd->sam_task_attr == MSG_HEAD_TAG) {
atomic_dec(&dev->dev_hoq_count);
smp_mb__after_atomic_dec();
dev->dev_cur_ordered_id++;
DEBUG_STA("Incremented dev_cur_ordered_id: %u for"
" HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id,
cmd->se_ordered_id);
- } else if (cmd->sam_task_attr == TASK_ATTR_ORDERED) {
+ } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) {
spin_lock(&dev->ordered_cmd_lock);
list_del(&cmd->se_ordered_list);
atomic_dec(&dev->dev_ordered_sync);
@@ -3837,7 +3837,7 @@ static void transport_complete_task_attr(struct se_cmd *cmd)
new_active_tasks++;
spin_lock(&dev->delayed_cmd_lock);
- if (cmd_p->sam_task_attr == TASK_ATTR_ORDERED)
+ if (cmd_p->sam_task_attr == MSG_ORDERED_TAG)
break;
}
spin_unlock(&dev->delayed_cmd_lock);
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c
index 49e5177..c056a11 100644
--- a/drivers/target/tcm_fc/tfc_cmd.c
+++ b/drivers/target/tcm_fc/tfc_cmd.c
@@ -35,6 +35,7 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
#include <scsi/libfc.h>
#include <scsi/fc_encode.h>
@@ -592,8 +593,25 @@ static void ft_send_cmd(struct ft_cmd *cmd)
case FCP_CFL_WRDATA | FCP_CFL_RDDATA:
goto err; /* TBD not supported by tcm_fc yet */
}
+ /*
+ * Locate the SAM Task Attr from fc_pri_ta
+ */
+ switch (fcp->fc_pri_ta & FCP_PTA_MASK) {
+ case FCP_PTA_HEADQ:
+ task_attr = MSG_HEAD_TAG;
+ break;
+ case FCP_PTA_ORDERED:
+ task_attr = MSG_ORDERED_TAG;
+ break;
+ case FCP_PTA_ACA:
+ task_attr = MSG_ACA_TAG;
+ break;
+ case FCP_PTA_SIMPLE: /* Fallthrough */
+ default:
+ task_attr = MSG_SIMPLE_TAG;
+ }
+
- /* FCP_PTA_ maps 1:1 to TASK_ATTR_ */
task_attr = fcp->fc_pri_ta & FCP_PTA_MASK;
data_len = ntohl(fcp->fc_dl);
cmd->cdb = fcp->fc_cdb;
diff --git a/include/scsi/scsi_tcq.h b/include/scsi/scsi_tcq.h
index d6e7994..81dd12e 100644
--- a/include/scsi/scsi_tcq.h
+++ b/include/scsi/scsi_tcq.h
@@ -9,6 +9,7 @@
#define MSG_SIMPLE_TAG 0x20
#define MSG_HEAD_TAG 0x21
#define MSG_ORDERED_TAG 0x22
+#define MSG_ACA_TAG 0x24 /* unsupported */
#define SCSI_NO_TAG (-1) /* identify no tag in use */
--
1.7.5.1
--
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