[PATCH 2/2] mvsas: add support for Task collector mode and fixed relative bugs

From: yxlraid
Date: Tue Apr 26 2011 - 09:37:28 EST

From: Xiangliang Yu <yuxiangl@xxxxxxxxxxx>

1.Add support for Task collector mode.
2.Fixed relative collector mode bug:
- I/O failed when disks is on two ports
- system hang when hotplug disk
- system hang when unplug disk during run IO
3.Unlock ap->lock within .lldd_execute_task for direct mode to improve performance

Signed-off-by: Xiangliang Yu <yuxiangl@xxxxxxxxxxx>
---
drivers/scsi/mvsas/Kconfig | 1 +
drivers/scsi/mvsas/Makefile | 1 +
drivers/scsi/mvsas/mv_64xx.c | 1 +
drivers/scsi/mvsas/mv_64xx.h | 1 +
drivers/scsi/mvsas/mv_94xx.c | 1 +
drivers/scsi/mvsas/mv_94xx.h | 1 +
drivers/scsi/mvsas/mv_chips.h | 1 +
drivers/scsi/mvsas/mv_defs.h | 1 +
drivers/scsi/mvsas/mv_init.c | 47 +++--
drivers/scsi/mvsas/mv_sas.c | 385 ++++++++++++++++++++++++++--------------
drivers/scsi/mvsas/mv_sas.h | 8 +
11 files changed, 295 insertions(+), 153 deletions(-)

diff --git a/drivers/scsi/mvsas/Kconfig b/drivers/scsi/mvsas/Kconfig
index 6de7af2..c82b012 100644
--- a/drivers/scsi/mvsas/Kconfig
+++ b/drivers/scsi/mvsas/Kconfig
@@ -3,6 +3,7 @@
#
# Copyright 2007 Red Hat, Inc.
# Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+# Copyright 2009-20011 Marvell. <yuxiangl@xxxxxxxxxxx>
#
# This file is licensed under GPLv2.
#
diff --git a/drivers/scsi/mvsas/Makefile b/drivers/scsi/mvsas/Makefile
index ffbf759..87b231a 100644
--- a/drivers/scsi/mvsas/Makefile
+++ b/drivers/scsi/mvsas/Makefile
@@ -3,6 +3,7 @@
#
# Copyright 2007 Red Hat, Inc.
# Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+# Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
#
# This file is licensed under GPLv2.
#
diff --git a/drivers/scsi/mvsas/mv_64xx.c b/drivers/scsi/mvsas/mv_64xx.c
index afc7f6f..13c9604 100644
--- a/drivers/scsi/mvsas/mv_64xx.c
+++ b/drivers/scsi/mvsas/mv_64xx.c
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
diff --git a/drivers/scsi/mvsas/mv_64xx.h b/drivers/scsi/mvsas/mv_64xx.h
index 42e947d..545889b 100644
--- a/drivers/scsi/mvsas/mv_64xx.h
+++ b/drivers/scsi/mvsas/mv_64xx.h
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index eed4c5c..78162c3 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
diff --git a/drivers/scsi/mvsas/mv_94xx.h b/drivers/scsi/mvsas/mv_94xx.h
index 23ed9b1..8835bef 100644
--- a/drivers/scsi/mvsas/mv_94xx.h
+++ b/drivers/scsi/mvsas/mv_94xx.h
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
diff --git a/drivers/scsi/mvsas/mv_chips.h b/drivers/scsi/mvsas/mv_chips.h
index a67e1c4..1753a6f 100644
--- a/drivers/scsi/mvsas/mv_chips.h
+++ b/drivers/scsi/mvsas/mv_chips.h
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h
index 880613f..bc00c94 100644
--- a/drivers/scsi/mvsas/mv_defs.h
+++ b/drivers/scsi/mvsas/mv_defs.h
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
index 0123c6b..90b6366 100644
--- a/drivers/scsi/mvsas/mv_init.c
+++ b/drivers/scsi/mvsas/mv_init.c
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
@@ -25,7 +26,16 @@

#include "mv_sas.h"

+static int lldd_max_execute_num = 1;
+module_param_named(collector, lldd_max_execute_num, int, S_IRUGO);
+MODULE_PARM_DESC(collector, "\n"
+ "\tIf greater than one, tells the SAS Layer to run in Task Collector\n"
+ "\tMode. If 1 or 0, tells the SAS Layer to run in Direct Mode.\n"
+ "\tThe mvsas SAS LLDD supports both modes.\n"
+ "\tDefault: 1 (Direct Mode).\n");
+
static struct scsi_transport_template *mvs_stt;
+struct kmem_cache *mvs_task_list_cache;
static const struct mvs_chip_info mvs_chips[] = {
[chip_6320] = { 1, 2, 0x400, 17, 16, 9, &mvs_64xx_dispatch, },
[chip_6440] = { 1, 4, 0x400, 17, 16, 9, &mvs_64xx_dispatch, },
@@ -109,7 +119,6 @@ static void __devinit mvs_phy_init(struct mvs_info *mvi, int phy_id)

static void mvs_free(struct mvs_info *mvi)
{
- int i;
struct mvs_wq *mwq;
int slot_nr;

@@ -121,12 +130,8 @@ static void mvs_free(struct mvs_info *mvi)
else
slot_nr = MVS_SLOTS;

- for (i = 0; i < mvi->tags_num; i++) {
- struct mvs_slot_info *slot = &mvi->slot_info[i];
- if (slot->buf)
- dma_free_coherent(mvi->dev, MVS_SLOT_BUF_SZ,
- slot->buf, slot->buf_dma);
- }
+ if (mvi->dma_pool)
+ pci_pool_destroy(mvi->dma_pool);

if (mvi->tx)
dma_free_coherent(mvi->dev,
@@ -215,6 +220,7 @@ static irqreturn_t mvs_interrupt(int irq, void *opaque)
static int __devinit mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost)
{
int i = 0, slot_nr;
+ char pool_name[32];

if (mvi->flags & MVF_FLAG_SOC)
slot_nr = MVS_SOC_SLOTS;
@@ -274,18 +280,14 @@ static int __devinit mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost)
if (!mvi->bulk_buffer)
goto err_out;
#endif
- for (i = 0; i < slot_nr; i++) {
- struct mvs_slot_info *slot = &mvi->slot_info[i];
-
- slot->buf = dma_alloc_coherent(mvi->dev, MVS_SLOT_BUF_SZ,
- &slot->buf_dma, GFP_KERNEL);
- if (!slot->buf) {
- printk(KERN_DEBUG"failed to allocate slot->buf.\n");
+ sprintf(pool_name, "%s%d", "mvs_dma_pool", mvi->id);
+ mvi->dma_pool = pci_pool_create(pool_name, mvi->pdev, MVS_SLOT_BUF_SZ, 16, 0);
+ if (!mvi->dma_pool) {
+ printk(KERN_DEBUG "failed to create dma pool %s.\n", pool_name);
goto err_out;
- }
- memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
- ++mvi->tags_num;
}
+ mvi->tags_num = slot_nr;
+
/* Initialize tags */
mvs_tag_init(mvi);
return 0;
@@ -486,7 +488,7 @@ static void __devinit mvs_post_sas_ha_init(struct Scsi_Host *shost,

sha->num_phys = nr_core * chip_info->n_phy;

- sha->lldd_max_execute_num = 1;
+ sha->lldd_max_execute_num = lldd_max_execute_num;

if (mvi->flags & MVF_FLAG_SOC)
can_queue = MVS_SOC_CAN_QUEUE;
@@ -710,6 +712,14 @@ static int __init mvs_init(void)
if (!mvs_stt)
return -ENOMEM;

+ mvs_task_list_cache = kmem_cache_create("mvs_task_list", sizeof(struct mvs_task_list),
+ 0, SLAB_HWCACHE_ALIGN, NULL);
+ if (!mvs_task_list_cache) {
+ rc = -ENOMEM;
+ mv_printk("%s: mvs_task_list_cache alloc failed! \n", __func__);
+ goto err_out;
+ }
+
rc = pci_register_driver(&mvs_pci_driver);

if (rc)
@@ -726,6 +736,7 @@ static void __exit mvs_exit(void)
{
pci_unregister_driver(&mvs_pci_driver);
sas_release_transport(mvs_stt);
+ kmem_cache_destroy(mvs_task_list_cache);
}

module_init(mvs_init);
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index adedaa9..0ef2742 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
@@ -862,178 +863,286 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi,
}

#define DEV_IS_GONE(mvi_dev) ((!mvi_dev || (mvi_dev->dev_type == NO_DEVICE)))
-static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
- struct completion *completion,int is_tmf,
- struct mvs_tmf_task *tmf)
+static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf,
+ struct mvs_tmf_task *tmf, int *pass)
{
struct domain_device *dev = task->dev;
- struct mvs_device *mvi_dev = (struct mvs_device *)dev->lldd_dev;
- struct mvs_info *mvi = mvi_dev->mvi_info;
+ struct mvs_device *mvi_dev = dev->lldd_dev;
struct mvs_task_exec_info tei;
- struct sas_task *t = task;
struct mvs_slot_info *slot;
- u32 tag = 0xdeadbeef, rc, n_elem = 0;
- u32 n = num, pass = 0;
- unsigned long flags = 0, flags_libsas = 0;
+ u32 tag = 0xdeadbeef, n_elem = 0;
+ int rc = 0;

if (!dev->port) {
- struct task_status_struct *tsm = &t->task_status;
+ struct task_status_struct *tsm = &task->task_status;

tsm->resp = SAS_TASK_UNDELIVERED;
tsm->stat = SAS_PHY_DOWN;
+ /*
+ * libsas will use dev->port, should
+ * not call task_done for sata
+ */
if (dev->dev_type != SATA_DEV)
- t->task_done(t);
- return 0;
+ task->task_done(task);
+ return rc;
}

- spin_lock_irqsave(&mvi->lock, flags);
- do {
- dev = t->dev;
- mvi_dev = dev->lldd_dev;
- if (DEV_IS_GONE(mvi_dev)) {
- if (mvi_dev)
- mv_dprintk("device %d not ready.\n",
- mvi_dev->device_id);
- else
- mv_dprintk("device %016llx not ready.\n",
- SAS_ADDR(dev->sas_addr));
+ if (DEV_IS_GONE(mvi_dev)) {
+ if (mvi_dev)
+ mv_dprintk("device %d not ready.\n",
+ mvi_dev->device_id);
+ else
+ mv_dprintk("device %016llx not ready.\n",
+ SAS_ADDR(dev->sas_addr));

rc = SAS_PHY_DOWN;
- goto out_done;
- }
+ return rc;
+ }
+ tei.port = dev->port->lldd_port;
+ if (tei.port && !tei.port->port_attached && !tmf) {
+ if (sas_protocol_ata(task->task_proto)) {
+ struct task_status_struct *ts = &task->task_status;
+ mv_dprintk("SATA/STP port %d does not attach"
+ "device.\n", dev->port->id);
+ ts->resp = SAS_TASK_COMPLETE;
+ ts->stat = SAS_PHY_DOWN;

- if (dev->port->id >= mvi->chip->n_phy)
- tei.port = &mvi->port[dev->port->id - mvi->chip->n_phy];
- else
- tei.port = &mvi->port[dev->port->id];
-
- if (tei.port && !tei.port->port_attached) {
- if (sas_protocol_ata(t->task_proto)) {
- struct task_status_struct *ts = &t->task_status;
-
- mv_dprintk("port %d does not"
- "attached device.\n", dev->port->id);
- ts->stat = SAS_PROTO_RESPONSE;
- ts->stat = SAS_PHY_DOWN;
- spin_unlock_irqrestore(dev->sata_dev.ap->lock,
- flags_libsas);
- spin_unlock_irqrestore(&mvi->lock, flags);
- t->task_done(t);
- spin_lock_irqsave(&mvi->lock, flags);
- spin_lock_irqsave(dev->sata_dev.ap->lock,
- flags_libsas);
- if (n > 1)
- t = list_entry(t->list.next,
- struct sas_task, list);
- continue;
- } else {
- struct task_status_struct *ts = &t->task_status;
- ts->resp = SAS_TASK_UNDELIVERED;
- ts->stat = SAS_PHY_DOWN;
- t->task_done(t);
- if (n > 1)
- t = list_entry(t->list.next,
- struct sas_task, list);
- continue;
- }
- }
+ task->task_done(task);

- if (!sas_protocol_ata(t->task_proto)) {
- if (t->num_scatter) {
- n_elem = dma_map_sg(mvi->dev,
- t->scatter,
- t->num_scatter,
- t->data_dir);
- if (!n_elem) {
- rc = -ENOMEM;
- goto err_out;
- }
- }
} else {
- n_elem = t->num_scatter;
+ struct task_status_struct *ts = &task->task_status;
+ mv_dprintk("SAS port %d does not attach"
+ "device.\n", dev->port->id);
+ ts->resp = SAS_TASK_UNDELIVERED;
+ ts->stat = SAS_PHY_DOWN;
+ task->task_done(task);
}
+ return rc;
+ }

- rc = mvs_tag_alloc(mvi, &tag);
- if (rc)
- goto err_out;
+ if (!sas_protocol_ata(task->task_proto)) {
+ if (task->num_scatter) {
+ n_elem = dma_map_sg(mvi->dev,
+ task->scatter,
+ task->num_scatter,
+ task->data_dir);
+ if (!n_elem) {
+ rc = -ENOMEM;
+ goto prep_out;
+ }
+ }
+ } else {
+ n_elem = task->num_scatter;
+ }

- slot = &mvi->slot_info[tag];
+ rc = mvs_tag_alloc(mvi, &tag);
+ if (rc)
+ goto err_out;

+ slot = &mvi->slot_info[tag];

- t->lldd_task = NULL;
- slot->n_elem = n_elem;
- slot->slot_tag = tag;
- memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
+ task->lldd_task = NULL;
+ slot->n_elem = n_elem;
+ slot->slot_tag = tag;
+
+ slot->buf = pci_pool_alloc(mvi->dma_pool, GFP_ATOMIC, &slot->buf_dma);
+ if (!slot->buf)
+ goto err_out_tag;
+ memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
+
+ tei.task = task;
+ tei.hdr = &mvi->slot[tag];
+ tei.tag = tag;
+ tei.n_elem = n_elem;
+ switch (task->task_proto) {
+ case SAS_PROTOCOL_SMP:
+ rc = mvs_task_prep_smp(mvi, &tei);
+ break;
+ case SAS_PROTOCOL_SSP:
+ rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
+ break;
+ case SAS_PROTOCOL_SATA:
+ case SAS_PROTOCOL_STP:
+ case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
+ rc = mvs_task_prep_ata(mvi, &tei);
+ break;
+ default:
+ dev_printk(KERN_ERR, mvi->dev,
+ "unknown sas_task proto: 0x%x\n",
+ task->task_proto);
+ rc = -EINVAL;
+ break;
+ }

- tei.task = t;
- tei.hdr = &mvi->slot[tag];
- tei.tag = tag;
- tei.n_elem = n_elem;
- switch (t->task_proto) {
- case SAS_PROTOCOL_SMP:
- rc = mvs_task_prep_smp(mvi, &tei);
- break;
- case SAS_PROTOCOL_SSP:
- rc = mvs_task_prep_ssp(mvi, &tei, is_tmf, tmf);
- break;
- case SAS_PROTOCOL_SATA:
- case SAS_PROTOCOL_STP:
- case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
- rc = mvs_task_prep_ata(mvi, &tei);
- break;
- default:
- dev_printk(KERN_ERR, mvi->dev,
- "unknown sas_task proto: 0x%x\n",
- t->task_proto);
- rc = -EINVAL;
- break;
- }
+ if (rc) {
+ mv_dprintk("rc is %x\n", rc);
+ goto err_out_slot_buf;
+ }
+ slot->task = task;
+ slot->port = tei.port;
+ task->lldd_task = slot;
+ list_add_tail(&slot->entry, &tei.port->list);
+ spin_lock(&task->task_state_lock);
+ task->task_state_flags |= SAS_TASK_AT_INITIATOR;
+ spin_unlock(&task->task_state_lock);

- if (rc) {
- mv_dprintk("rc is %x\n", rc);
- goto err_out_tag;
- }
- slot->task = t;
- slot->port = tei.port;
- t->lldd_task = slot;
- list_add_tail(&slot->entry, &tei.port->list);
- /* TODO: select normal or high priority */
- spin_lock(&t->task_state_lock);
- t->task_state_flags |= SAS_TASK_AT_INITIATOR;
- spin_unlock(&t->task_state_lock);
-
- mvs_hba_memory_dump(mvi, tag, t->task_proto);
- mvi_dev->running_req++;
- ++pass;
- mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
- if (n > 1)
- t = list_entry(t->list.next, struct sas_task, list);
- if (likely(pass))
- MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
- (MVS_CHIP_SLOT_SZ - 1));
+ mvs_hba_memory_dump(mvi, tag, task->task_proto);
+ mvi_dev->running_req++;
+ ++(*pass);
+ mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);

- } while (--n);
- rc = 0;
- goto out_done;
+ return rc;

+err_out_slot_buf:
+ pci_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
err_out_tag:
mvs_tag_free(mvi, tag);
err_out:

- dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
- if (!sas_protocol_ata(t->task_proto))
+ dev_printk(KERN_ERR, mvi->dev, "mvsas prep failed[%d]!\n", rc);
+ if (!sas_protocol_ata(task->task_proto))
if (n_elem)
- dma_unmap_sg(mvi->dev, t->scatter, n_elem,
- t->data_dir);
-out_done:
+ dma_unmap_sg(mvi->dev, task->scatter, n_elem,
+ task->data_dir);
+prep_out:
+ return rc;
+}
+
+static struct mvs_task_list *mvs_task_alloc_list(int *num, gfp_t gfp_flags)
+{
+ struct mvs_task_list *first = NULL;
+
+ for (; *num > 0; --*num) {
+ struct mvs_task_list *mvs_list = kmem_cache_zalloc(mvs_task_list_cache, gfp_flags);
+
+ if (!mvs_list)
+ break;
+
+ INIT_LIST_HEAD(&mvs_list->list);
+ if (!first)
+ first = mvs_list;
+ else
+ list_add_tail(&mvs_list->list, &first->list);
+
+ }
+
+ return first;
+}
+
+static inline void mvs_task_free_list(struct mvs_task_list *mvs_list)
+{
+ LIST_HEAD(list);
+ struct list_head *pos, *a;
+ struct mvs_task_list *mlist = NULL;
+
+ __list_add(&list, mvs_list->list.prev, &mvs_list->list);
+
+ list_for_each_safe(pos, a, &list) {
+ list_del_init(pos);
+ mlist = list_entry(pos, struct mvs_task_list, list);
+ kmem_cache_free(mvs_task_list_cache, mlist);
+ }
+}
+
+static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
+ struct completion *completion, int is_tmf,
+ struct mvs_tmf_task *tmf)
+{
+ struct domain_device *dev = task->dev;
+ struct mvs_info *mvi = NULL;
+ u32 rc = 0;
+ u32 pass = 0;
+ unsigned long flags = 0;
+
+ mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info;
+
+ if ((dev->dev_type == SATA_DEV) && (dev->sata_dev.ap != NULL))
+ spin_unlock_irq(dev->sata_dev.ap->lock);
+
+ spin_lock_irqsave(&mvi->lock, flags);
+ rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass);
+ if (rc)
+ dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
+
+ if (likely(pass))
+ MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) &
+ (MVS_CHIP_SLOT_SZ - 1));
spin_unlock_irqrestore(&mvi->lock, flags);
+
+ if ((dev->dev_type == SATA_DEV) && (dev->sata_dev.ap != NULL))
+ spin_lock_irq(dev->sata_dev.ap->lock);
+
+ return rc;
+}
+
+static int mvs_collector_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags,
+ struct completion *completion, int is_tmf,
+ struct mvs_tmf_task *tmf)
+{
+ struct domain_device *dev = task->dev;
+ struct mvs_prv_info *mpi = dev->port->ha->lldd_ha;
+ struct mvs_info *mvi = NULL;
+ struct sas_task *t = task;
+ struct mvs_task_list *mvs_list = NULL, *a;
+ LIST_HEAD(q);
+ int pass[2] = {0};
+ u32 rc = 0;
+ u32 n = num;
+ unsigned long flags = 0;
+
+ mvs_list = mvs_task_alloc_list(&n, gfp_flags);
+ if (n) {
+ printk(KERN_ERR "%s: mvs alloc list failed.\n", __func__);
+ rc = -ENOMEM;
+ goto free_list;
+ }
+
+ __list_add(&q, mvs_list->list.prev, &mvs_list->list);
+
+ list_for_each_entry(a, &q, list) {
+ a->task = t;
+ t = list_entry(t->list.next, struct sas_task, list);
+ }
+
+ list_for_each_entry(a, &q , list) {
+
+ t = a->task;
+ mvi = ((struct mvs_device *)t->dev->lldd_dev)->mvi_info;
+
+ spin_lock_irqsave(&mvi->lock, flags);
+ rc = mvs_task_prep(t, mvi, is_tmf, tmf, &pass[mvi->id]);
+ if (rc)
+ dev_printk(KERN_ERR, mvi->dev, "mvsas exec failed[%d]!\n", rc);
+ spin_unlock_irqrestore(&mvi->lock, flags);
+ }
+
+ if (likely(pass[0]))
+ MVS_CHIP_DISP->start_delivery(mpi->mvi[0],
+ (mpi->mvi[0]->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1));
+
+ if (likely(pass[1]))
+ MVS_CHIP_DISP->start_delivery(mpi->mvi[1],
+ (mpi->mvi[1]->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1));
+
+ list_del_init(&q);
+
+free_list:
+ if (mvs_list)
+ mvs_task_free_list(mvs_list);
+
return rc;
}

int mvs_queue_command(struct sas_task *task, const int num,
gfp_t gfp_flags)
{
- return mvs_task_exec(task, num, gfp_flags, NULL, 0, NULL);
+ struct mvs_device *mvi_dev = task->dev->lldd_dev;
+ struct sas_ha_struct *sas = mvi_dev->mvi_info->sas;
+
+ if (sas->lldd_max_execute_num < 2)
+ return mvs_task_exec(task, num, gfp_flags, NULL, 0, NULL);
+ else
+ return mvs_collector_task_exec(task, num, gfp_flags, NULL, 0, NULL);
}

static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc)
@@ -1067,6 +1176,11 @@ static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task,
/* do nothing */
break;
}
+
+ if (slot->buf) {
+ pci_pool_free(mvi->dma_pool, slot->buf, slot->buf_dma);
+ slot->buf = NULL;
+ }
list_del_init(&slot->entry);
task->lldd_task = NULL;
slot->task = NULL;
@@ -1255,6 +1369,7 @@ static void mvs_port_notify_formed(struct asd_sas_phy *sas_phy, int lock)
spin_lock_irqsave(&mvi->lock, flags);
port->port_attached = 1;
phy->port = port;
+ sas_port->lldd_port = port;
if (phy->phy_type & PORT_TYPE_SAS) {
port->wide_port_phymap = sas_port->phy_mask;
mv_printk("set wide port phy map %x\n", sas_port->phy_mask);
diff --git a/drivers/scsi/mvsas/mv_sas.h b/drivers/scsi/mvsas/mv_sas.h
index 77ddc7c..1367d8b 100644
--- a/drivers/scsi/mvsas/mv_sas.h
+++ b/drivers/scsi/mvsas/mv_sas.h
@@ -3,6 +3,7 @@
*
* Copyright 2007 Red Hat, Inc.
* Copyright 2008 Marvell. <kewei@xxxxxxxxxxx>
+ * Copyright 2009-2011 Marvell. <yuxiangl@xxxxxxxxxxx>
*
* This file is licensed under GPLv2.
*
@@ -67,6 +68,7 @@ extern struct mvs_tgt_initiator mvs_tgt;
extern struct mvs_info *tgt_mvi;
extern const struct mvs_dispatch mvs_64xx_dispatch;
extern const struct mvs_dispatch mvs_94xx_dispatch;
+extern struct kmem_cache *mvs_task_list_cache;

#define DEV_IS_EXPANDER(type) \
((type == EDGE_DEV) || (type == FANOUT_DEV))
@@ -341,6 +343,7 @@ struct mvs_info {
dma_addr_t bulk_buffer_dma;
#define TRASH_BUCKET_SIZE 0x20000
#endif
+ void *dma_pool;
struct mvs_slot_info slot_info[0];
};

@@ -367,6 +370,11 @@ struct mvs_task_exec_info {
int n_elem;
};

+struct mvs_task_list {
+ struct sas_task *task;
+ struct list_head list;
+};
+

/******************** function prototype *********************/
void mvs_get_sas_addr(void *buf, u32 buflen);
--
1.7.4.4

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