android_kernel_xiaomi_sm8350/drivers/scsi/aic94xx/aic94xx_tmf.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from  to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

712 lines
20 KiB
C

/*
* Aic94xx Task Management Functions
*
* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
*
* This file is licensed under GPLv2.
*
* This file is part of the aic94xx driver.
*
* The aic94xx driver is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of the
* License.
*
* The aic94xx driver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the aic94xx driver; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/spinlock.h>
#include <linux/gfp.h>
#include "aic94xx.h"
#include "aic94xx_sas.h"
#include "aic94xx_hwi.h"
/* ---------- Internal enqueue ---------- */
static int asd_enqueue_internal(struct asd_ascb *ascb,
void (*tasklet_complete)(struct asd_ascb *,
struct done_list_struct *),
void (*timed_out)(unsigned long))
{
int res;
ascb->tasklet_complete = tasklet_complete;
ascb->uldd_timer = 1;
ascb->timer.data = (unsigned long) ascb;
ascb->timer.function = timed_out;
ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT;
add_timer(&ascb->timer);
res = asd_post_ascb_list(ascb->ha, ascb, 1);
if (unlikely(res))
del_timer(&ascb->timer);
return res;
}
/* ---------- CLEAR NEXUS ---------- */
struct tasklet_completion_status {
int dl_opcode;
int tmf_state;
u8 tag_valid:1;
__be16 tag;
};
#define DECLARE_TCS(tcs) \
struct tasklet_completion_status tcs = { \
.dl_opcode = 0, \
.tmf_state = 0, \
.tag_valid = 0, \
.tag = 0, \
}
static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb,
struct done_list_struct *dl)
{
struct tasklet_completion_status *tcs = ascb->uldd_task;
ASD_DPRINTK("%s: here\n", __func__);
if (!del_timer(&ascb->timer)) {
ASD_DPRINTK("%s: couldn't delete timer\n", __func__);
return;
}
ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode);
tcs->dl_opcode = dl->opcode;
complete(ascb->completion);
asd_ascb_free(ascb);
}
static void asd_clear_nexus_timedout(unsigned long data)
{
struct asd_ascb *ascb = (void *)data;
struct tasklet_completion_status *tcs = ascb->uldd_task;
ASD_DPRINTK("%s: here\n", __func__);
tcs->dl_opcode = TMF_RESP_FUNC_FAILED;
complete(ascb->completion);
}
#define CLEAR_NEXUS_PRE \
struct asd_ascb *ascb; \
struct scb *scb; \
int res; \
DECLARE_COMPLETION_ONSTACK(completion); \
DECLARE_TCS(tcs); \
\
ASD_DPRINTK("%s: PRE\n", __func__); \
res = 1; \
ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \
if (!ascb) \
return -ENOMEM; \
\
ascb->completion = &completion; \
ascb->uldd_task = &tcs; \
scb = ascb->scb; \
scb->header.opcode = CLEAR_NEXUS
#define CLEAR_NEXUS_POST \
ASD_DPRINTK("%s: POST\n", __func__); \
res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \
asd_clear_nexus_timedout); \
if (res) \
goto out_err; \
ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \
wait_for_completion(&completion); \
res = tcs.dl_opcode; \
if (res == TC_NO_ERROR) \
res = TMF_RESP_FUNC_COMPLETE; \
return res; \
out_err: \
asd_ascb_free(ascb); \
return res
int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha)
{
struct asd_ha_struct *asd_ha = sas_ha->lldd_ha;
CLEAR_NEXUS_PRE;
scb->clear_nexus.nexus = NEXUS_ADAPTER;
CLEAR_NEXUS_POST;
}
int asd_clear_nexus_port(struct asd_sas_port *port)
{
struct asd_ha_struct *asd_ha = port->ha->lldd_ha;
CLEAR_NEXUS_PRE;
scb->clear_nexus.nexus = NEXUS_PORT;
scb->clear_nexus.conn_mask = port->phy_mask;
CLEAR_NEXUS_POST;
}
enum clear_nexus_phase {
NEXUS_PHASE_PRE,
NEXUS_PHASE_POST,
NEXUS_PHASE_RESUME,
};
static int asd_clear_nexus_I_T(struct domain_device *dev,
enum clear_nexus_phase phase)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
CLEAR_NEXUS_PRE;
scb->clear_nexus.nexus = NEXUS_I_T;
switch (phase) {
case NEXUS_PHASE_PRE:
scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX;
break;
case NEXUS_PHASE_POST:
scb->clear_nexus.flags = SEND_Q | NOTINQ;
break;
case NEXUS_PHASE_RESUME:
scb->clear_nexus.flags = RESUME_TX;
}
scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
dev->lldd_dev);
CLEAR_NEXUS_POST;
}
int asd_I_T_nexus_reset(struct domain_device *dev)
{
int res, tmp_res, i;
struct sas_phy *phy = sas_find_local_phy(dev);
/* Standard mandates link reset for ATA (type 0) and
* hard reset for SSP (type 1) */
int reset_type = (dev->dev_type == SATA_DEV ||
(dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE);
/* send a hard reset */
ASD_DPRINTK("sending %s reset to %s\n",
reset_type ? "hard" : "soft", dev_name(&phy->dev));
res = sas_phy_reset(phy, reset_type);
if (res == TMF_RESP_FUNC_COMPLETE) {
/* wait for the maximum settle time */
msleep(500);
/* clear all outstanding commands (keep nexus suspended) */
asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST);
}
for (i = 0 ; i < 3; i++) {
tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME);
if (tmp_res == TC_RESUME)
return res;
msleep(500);
}
/* This is a bit of a problem: the sequencer is still suspended
* and is refusing to resume. Hope it will resume on a bigger hammer
* or the disk is lost */
dev_printk(KERN_ERR, &phy->dev,
"Failed to resume nexus after reset 0x%x\n", tmp_res);
return TMF_RESP_FUNC_FAILED;
}
static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
CLEAR_NEXUS_PRE;
scb->clear_nexus.nexus = NEXUS_I_T_L;
scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
memcpy(scb->clear_nexus.ssp_task.lun, lun, 8);
scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
dev->lldd_dev);
CLEAR_NEXUS_POST;
}
static int asd_clear_nexus_tag(struct sas_task *task)
{
struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
struct asd_ascb *tascb = task->lldd_task;
CLEAR_NEXUS_PRE;
scb->clear_nexus.nexus = NEXUS_TAG;
memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8);
scb->clear_nexus.ssp_task.tag = tascb->tag;
if (task->dev->tproto)
scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
task->dev->lldd_dev);
CLEAR_NEXUS_POST;
}
static int asd_clear_nexus_index(struct sas_task *task)
{
struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
struct asd_ascb *tascb = task->lldd_task;
CLEAR_NEXUS_PRE;
scb->clear_nexus.nexus = NEXUS_TRANS_CX;
if (task->dev->tproto)
scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
task->dev->lldd_dev);
scb->clear_nexus.index = cpu_to_le16(tascb->tc_index);
CLEAR_NEXUS_POST;
}
/* ---------- TMFs ---------- */
static void asd_tmf_timedout(unsigned long data)
{
struct asd_ascb *ascb = (void *) data;
struct tasklet_completion_status *tcs = ascb->uldd_task;
ASD_DPRINTK("tmf timed out\n");
tcs->tmf_state = TMF_RESP_FUNC_FAILED;
complete(ascb->completion);
}
static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb,
struct done_list_struct *dl)
{
struct asd_ha_struct *asd_ha = ascb->ha;
unsigned long flags;
struct tc_resp_sb_struct {
__le16 index_escb;
u8 len_lsb;
u8 flags;
} __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
struct asd_ascb *escb;
struct asd_dma_tok *edb;
struct ssp_frame_hdr *fh;
struct ssp_response_iu *ru;
int res = TMF_RESP_FUNC_FAILED;
ASD_DPRINTK("tmf resp tasklet\n");
spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
escb = asd_tc_index_find(&asd_ha->seq,
(int)le16_to_cpu(resp_sb->index_escb));
spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
if (!escb) {
ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
return res;
}
edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
ascb->tag = *(__be16 *)(edb->vaddr+4);
fh = edb->vaddr + 16;
ru = edb->vaddr + 16 + sizeof(*fh);
res = ru->status;
if (ru->datapres == 1) /* Response data present */
res = ru->resp_data[3];
#if 0
ascb->tag = fh->tag;
#endif
ascb->tag_valid = 1;
asd_invalidate_edb(escb, edb_id);
return res;
}
static void asd_tmf_tasklet_complete(struct asd_ascb *ascb,
struct done_list_struct *dl)
{
struct tasklet_completion_status *tcs;
if (!del_timer(&ascb->timer))
return;
tcs = ascb->uldd_task;
ASD_DPRINTK("tmf tasklet complete\n");
tcs->dl_opcode = dl->opcode;
if (dl->opcode == TC_SSP_RESP) {
tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl);
tcs->tag_valid = ascb->tag_valid;
tcs->tag = ascb->tag;
}
complete(ascb->completion);
asd_ascb_free(ascb);
}
static int asd_clear_nexus(struct sas_task *task)
{
int res = TMF_RESP_FUNC_FAILED;
int leftover;
struct asd_ascb *tascb = task->lldd_task;
DECLARE_COMPLETION_ONSTACK(completion);
unsigned long flags;
tascb->completion = &completion;
ASD_DPRINTK("task not done, clearing nexus\n");
if (tascb->tag_valid)
res = asd_clear_nexus_tag(task);
else
res = asd_clear_nexus_index(task);
leftover = wait_for_completion_timeout(&completion,
AIC94XX_SCB_TIMEOUT);
tascb->completion = NULL;
ASD_DPRINTK("came back from clear nexus\n");
spin_lock_irqsave(&task->task_state_lock, flags);
if (leftover < 1)
res = TMF_RESP_FUNC_FAILED;
if (task->task_state_flags & SAS_TASK_STATE_DONE)
res = TMF_RESP_FUNC_COMPLETE;
spin_unlock_irqrestore(&task->task_state_lock, flags);
return res;
}
/**
* asd_abort_task -- ABORT TASK TMF
* @task: the task to be aborted
*
* Before calling ABORT TASK the task state flags should be ORed with
* SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under
* the task_state_lock IRQ spinlock, then ABORT TASK *must* be called.
*
* Implements the ABORT TASK TMF, I_T_L_Q nexus.
* Returns: SAS TMF responses (see sas_task.h),
* -ENOMEM,
* -SAS_QUEUE_FULL.
*
* When ABORT TASK returns, the caller of ABORT TASK checks first the
* task->task_state_flags, and then the return value of ABORT TASK.
*
* If the task has task state bit SAS_TASK_STATE_DONE set, then the
* task was completed successfully prior to it being aborted. The
* caller of ABORT TASK has responsibility to call task->task_done()
* xor free the task, depending on their framework. The return code
* is TMF_RESP_FUNC_FAILED in this case.
*
* Else the SAS_TASK_STATE_DONE bit is not set,
* If the return code is TMF_RESP_FUNC_COMPLETE, then
* the task was aborted successfully. The caller of
* ABORT TASK has responsibility to call task->task_done()
* to finish the task, xor free the task depending on their
* framework.
* else
* the ABORT TASK returned some kind of error. The task
* was _not_ cancelled. Nothing can be assumed.
* The caller of ABORT TASK may wish to retry.
*/
int asd_abort_task(struct sas_task *task)
{
struct asd_ascb *tascb = task->lldd_task;
struct asd_ha_struct *asd_ha = tascb->ha;
int res = 1;
unsigned long flags;
struct asd_ascb *ascb = NULL;
struct scb *scb;
int leftover;
DECLARE_TCS(tcs);
DECLARE_COMPLETION_ONSTACK(completion);
DECLARE_COMPLETION_ONSTACK(tascb_completion);
tascb->completion = &tascb_completion;
spin_lock_irqsave(&task->task_state_lock, flags);
if (task->task_state_flags & SAS_TASK_STATE_DONE) {
spin_unlock_irqrestore(&task->task_state_lock, flags);
res = TMF_RESP_FUNC_COMPLETE;
ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
goto out_done;
}
spin_unlock_irqrestore(&task->task_state_lock, flags);
ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
if (!ascb)
return -ENOMEM;
ascb->uldd_task = &tcs;
ascb->completion = &completion;
scb = ascb->scb;
scb->header.opcode = SCB_ABORT_TASK;
switch (task->task_proto) {
case SAS_PROTOCOL_SATA:
case SAS_PROTOCOL_STP:
scb->abort_task.proto_conn_rate = (1 << 5); /* STP */
break;
case SAS_PROTOCOL_SSP:
scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */
scb->abort_task.proto_conn_rate |= task->dev->linkrate;
break;
case SAS_PROTOCOL_SMP:
break;
default:
break;
}
if (task->task_proto == SAS_PROTOCOL_SSP) {
scb->abort_task.ssp_frame.frame_type = SSP_TASK;
memcpy(scb->abort_task.ssp_frame.hashed_dest_addr,
task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
memcpy(scb->abort_task.ssp_frame.hashed_src_addr,
task->dev->port->ha->hashed_sas_addr,
HASHED_SAS_ADDR_SIZE);
scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8);
scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK;
scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF);
}
scb->abort_task.sister_scb = cpu_to_le16(0xFFFF);
scb->abort_task.conn_handle = cpu_to_le16(
(u16)(unsigned long)task->dev->lldd_dev);
scb->abort_task.retry_count = 1;
scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index);
scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
asd_tmf_timedout);
if (res)
goto out_free;
wait_for_completion(&completion);
ASD_DPRINTK("tmf came back\n");
tascb->tag = tcs.tag;
tascb->tag_valid = tcs.tag_valid;
spin_lock_irqsave(&task->task_state_lock, flags);
if (task->task_state_flags & SAS_TASK_STATE_DONE) {
spin_unlock_irqrestore(&task->task_state_lock, flags);
res = TMF_RESP_FUNC_COMPLETE;
ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
goto out_done;
}
spin_unlock_irqrestore(&task->task_state_lock, flags);
if (tcs.dl_opcode == TC_SSP_RESP) {
/* The task to be aborted has been sent to the device.
* We got a Response IU for the ABORT TASK TMF. */
if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE)
res = asd_clear_nexus(task);
else
res = tcs.tmf_state;
} else if (tcs.dl_opcode == TC_NO_ERROR &&
tcs.tmf_state == TMF_RESP_FUNC_FAILED) {
/* timeout */
res = TMF_RESP_FUNC_FAILED;
} else {
/* In the following we assume that the managing layer
* will _never_ make a mistake, when issuing ABORT
* TASK.
*/
switch (tcs.dl_opcode) {
default:
res = asd_clear_nexus(task);
/* fallthrough */
case TC_NO_ERROR:
break;
/* The task hasn't been sent to the device xor
* we never got a (sane) Response IU for the
* ABORT TASK TMF.
*/
case TF_NAK_RECV:
res = TMF_RESP_INVALID_FRAME;
break;
case TF_TMF_TASK_DONE: /* done but not reported yet */
res = TMF_RESP_FUNC_FAILED;
leftover =
wait_for_completion_timeout(&tascb_completion,
AIC94XX_SCB_TIMEOUT);
spin_lock_irqsave(&task->task_state_lock, flags);
if (leftover < 1)
res = TMF_RESP_FUNC_FAILED;
if (task->task_state_flags & SAS_TASK_STATE_DONE)
res = TMF_RESP_FUNC_COMPLETE;
spin_unlock_irqrestore(&task->task_state_lock, flags);
break;
case TF_TMF_NO_TAG:
case TF_TMF_TAG_FREE: /* the tag is in the free list */
case TF_TMF_NO_CONN_HANDLE: /* no such device */
res = TMF_RESP_FUNC_COMPLETE;
break;
case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
res = TMF_RESP_FUNC_ESUPP;
break;
}
}
out_done:
tascb->completion = NULL;
if (res == TMF_RESP_FUNC_COMPLETE) {
task->lldd_task = NULL;
mb();
asd_ascb_free(tascb);
}
ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
return res;
out_free:
asd_ascb_free(ascb);
ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
return res;
}
/**
* asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus
* @dev: pointer to struct domain_device of interest
* @lun: pointer to u8[8] which is the LUN
* @tmf: the TMF to be performed (see sas_task.h or the SAS spec)
* @index: the transaction context of the task to be queried if QT TMF
*
* This function is used to send ABORT TASK SET, CLEAR ACA,
* CLEAR TASK SET, LU RESET and QUERY TASK TMFs.
*
* No SCBs should be queued to the I_T_L nexus when this SCB is
* pending.
*
* Returns: TMF response code (see sas_task.h or the SAS spec)
*/
static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun,
int tmf, int index)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
struct asd_ascb *ascb;
int res = 1;
struct scb *scb;
DECLARE_COMPLETION_ONSTACK(completion);
DECLARE_TCS(tcs);
if (!(dev->tproto & SAS_PROTOCOL_SSP))
return TMF_RESP_FUNC_ESUPP;
ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
if (!ascb)
return -ENOMEM;
ascb->completion = &completion;
ascb->uldd_task = &tcs;
scb = ascb->scb;
if (tmf == TMF_QUERY_TASK)
scb->header.opcode = QUERY_SSP_TASK;
else
scb->header.opcode = INITIATE_SSP_TMF;
scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */
scb->ssp_tmf.proto_conn_rate |= dev->linkrate;
/* SSP frame header */
scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK;
memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr,
dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr,
dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF);
/* SSP Task IU */
memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8);
scb->ssp_tmf.ssp_task.tmf = tmf;
scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF);
scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long)
dev->lldd_dev);
scb->ssp_tmf.retry_count = 1;
scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
if (tmf == TMF_QUERY_TASK)
scb->ssp_tmf.index = cpu_to_le16(index);
res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
asd_tmf_timedout);
if (res)
goto out_err;
wait_for_completion(&completion);
switch (tcs.dl_opcode) {
case TC_NO_ERROR:
res = TMF_RESP_FUNC_COMPLETE;
break;
case TF_NAK_RECV:
res = TMF_RESP_INVALID_FRAME;
break;
case TF_TMF_TASK_DONE:
res = TMF_RESP_FUNC_FAILED;
break;
case TF_TMF_NO_TAG:
case TF_TMF_TAG_FREE: /* the tag is in the free list */
case TF_TMF_NO_CONN_HANDLE: /* no such device */
res = TMF_RESP_FUNC_COMPLETE;
break;
case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
res = TMF_RESP_FUNC_ESUPP;
break;
default:
/* Allow TMF response codes to propagate upwards */
res = tcs.dl_opcode;
break;
}
return res;
out_err:
asd_ascb_free(ascb);
return res;
}
int asd_abort_task_set(struct domain_device *dev, u8 *lun)
{
int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0);
if (res == TMF_RESP_FUNC_COMPLETE)
asd_clear_nexus_I_T_L(dev, lun);
return res;
}
int asd_clear_aca(struct domain_device *dev, u8 *lun)
{
int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0);
if (res == TMF_RESP_FUNC_COMPLETE)
asd_clear_nexus_I_T_L(dev, lun);
return res;
}
int asd_clear_task_set(struct domain_device *dev, u8 *lun)
{
int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0);
if (res == TMF_RESP_FUNC_COMPLETE)
asd_clear_nexus_I_T_L(dev, lun);
return res;
}
int asd_lu_reset(struct domain_device *dev, u8 *lun)
{
int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0);
if (res == TMF_RESP_FUNC_COMPLETE)
asd_clear_nexus_I_T_L(dev, lun);
return res;
}
/**
* asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus
* task: pointer to sas_task struct of interest
*
* Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set,
* or TMF_RESP_FUNC_SUCC if the task is in the task set.
*
* Normally the management layer sets the task to aborted state,
* and then calls query task and then abort task.
*/
int asd_query_task(struct sas_task *task)
{
struct asd_ascb *ascb = task->lldd_task;
int index;
if (ascb) {
index = ascb->tc_index;
return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN,
TMF_QUERY_TASK, index);
}
return TMF_RESP_FUNC_COMPLETE;
}