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path: root/drivers/scsi/bnx2fc/bnx2fc_io.c
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Diffstat (limited to 'drivers/scsi/bnx2fc/bnx2fc_io.c')
-rw-r--r--drivers/scsi/bnx2fc/bnx2fc_io.c73
1 files changed, 48 insertions, 25 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index 0f1dd23730d..d3fc302c241 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -11,6 +11,9 @@
*/
#include "bnx2fc.h"
+
+#define RESERVE_FREE_LIST_INDEX num_possible_cpus()
+
static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
int bd_index);
static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
@@ -242,8 +245,9 @@ struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
u32 mem_size;
u16 xid;
int i;
- int num_ios;
+ int num_ios, num_pri_ios;
size_t bd_tbl_sz;
+ int arr_sz = num_possible_cpus() + 1;
if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
@@ -263,14 +267,14 @@ struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
}
cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
- num_possible_cpus(), GFP_KERNEL);
+ arr_sz, GFP_KERNEL);
if (!cmgr->free_list) {
printk(KERN_ERR PFX "failed to alloc free_list\n");
goto mem_err;
}
cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
- num_possible_cpus(), GFP_KERNEL);
+ arr_sz, GFP_KERNEL);
if (!cmgr->free_list_lock) {
printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
goto mem_err;
@@ -279,13 +283,18 @@ struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
cmgr->hba = hba;
cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
- for (i = 0; i < num_possible_cpus(); i++) {
+ for (i = 0; i < arr_sz; i++) {
INIT_LIST_HEAD(&cmgr->free_list[i]);
spin_lock_init(&cmgr->free_list_lock[i]);
}
- /* Pre-allocated pool of bnx2fc_cmds */
+ /*
+ * Pre-allocated pool of bnx2fc_cmds.
+ * Last entry in the free list array is the free list
+ * of slow path requests.
+ */
xid = BNX2FC_MIN_XID;
+ num_pri_ios = num_ios - BNX2FC_ELSTM_XIDS;
for (i = 0; i < num_ios; i++) {
io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
@@ -298,11 +307,13 @@ struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
io_req->xid = xid++;
- if (io_req->xid >= BNX2FC_MAX_OUTSTANDING_CMNDS)
- printk(KERN_ERR PFX "ERROR allocating xids - 0x%x\n",
- io_req->xid);
- list_add_tail(&io_req->link,
- &cmgr->free_list[io_req->xid % num_possible_cpus()]);
+ if (i < num_pri_ios)
+ list_add_tail(&io_req->link,
+ &cmgr->free_list[io_req->xid %
+ num_possible_cpus()]);
+ else
+ list_add_tail(&io_req->link,
+ &cmgr->free_list[num_possible_cpus()]);
io_req++;
}
@@ -389,7 +400,7 @@ free_cmd_pool:
if (!cmgr->free_list)
goto free_cmgr;
- for (i = 0; i < num_possible_cpus(); i++) {
+ for (i = 0; i < num_possible_cpus() + 1; i++) {
struct list_head *list;
struct list_head *tmp;
@@ -413,6 +424,7 @@ struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
struct bnx2fc_cmd *io_req;
struct list_head *listp;
struct io_bdt *bd_tbl;
+ int index = RESERVE_FREE_LIST_INDEX;
u32 max_sqes;
u16 xid;
@@ -432,26 +444,26 @@ struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
* NOTE: Free list insertions and deletions are protected with
* cmgr lock
*/
- spin_lock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
- if ((list_empty(&(cmd_mgr->free_list[smp_processor_id()]))) ||
+ spin_lock_bh(&cmd_mgr->free_list_lock[index]);
+ if ((list_empty(&(cmd_mgr->free_list[index]))) ||
(tgt->num_active_ios.counter >= max_sqes)) {
BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
"ios(%d):sqes(%d)\n",
tgt->num_active_ios.counter, tgt->max_sqes);
- if (list_empty(&(cmd_mgr->free_list[smp_processor_id()])))
+ if (list_empty(&(cmd_mgr->free_list[index])))
printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
- spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
return NULL;
}
listp = (struct list_head *)
- cmd_mgr->free_list[smp_processor_id()].next;
+ cmd_mgr->free_list[index].next;
list_del_init(listp);
io_req = (struct bnx2fc_cmd *) listp;
xid = io_req->xid;
cmd_mgr->cmds[xid] = io_req;
atomic_inc(&tgt->num_active_ios);
- spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
INIT_LIST_HEAD(&io_req->link);
@@ -479,27 +491,30 @@ static struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
struct io_bdt *bd_tbl;
u32 max_sqes;
u16 xid;
+ int index = get_cpu();
max_sqes = BNX2FC_SCSI_MAX_SQES;
/*
* NOTE: Free list insertions and deletions are protected with
* cmgr lock
*/
- spin_lock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
- if ((list_empty(&cmd_mgr->free_list[smp_processor_id()])) ||
+ spin_lock_bh(&cmd_mgr->free_list_lock[index]);
+ if ((list_empty(&cmd_mgr->free_list[index])) ||
(tgt->num_active_ios.counter >= max_sqes)) {
- spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
+ put_cpu();
return NULL;
}
listp = (struct list_head *)
- cmd_mgr->free_list[smp_processor_id()].next;
+ cmd_mgr->free_list[index].next;
list_del_init(listp);
io_req = (struct bnx2fc_cmd *) listp;
xid = io_req->xid;
cmd_mgr->cmds[xid] = io_req;
atomic_inc(&tgt->num_active_ios);
- spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
+ put_cpu();
INIT_LIST_HEAD(&io_req->link);
@@ -522,8 +537,15 @@ void bnx2fc_cmd_release(struct kref *ref)
struct bnx2fc_cmd *io_req = container_of(ref,
struct bnx2fc_cmd, refcount);
struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
+ int index;
+
+ if (io_req->cmd_type == BNX2FC_SCSI_CMD)
+ index = io_req->xid % num_possible_cpus();
+ else
+ index = RESERVE_FREE_LIST_INDEX;
- spin_lock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+
+ spin_lock_bh(&cmd_mgr->free_list_lock[index]);
if (io_req->cmd_type != BNX2FC_SCSI_CMD)
bnx2fc_free_mp_resc(io_req);
cmd_mgr->cmds[io_req->xid] = NULL;
@@ -531,9 +553,10 @@ void bnx2fc_cmd_release(struct kref *ref)
list_del_init(&io_req->link);
/* Add it to the free list */
list_add(&io_req->link,
- &cmd_mgr->free_list[smp_processor_id()]);
+ &cmd_mgr->free_list[index]);
atomic_dec(&io_req->tgt->num_active_ios);
- spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[index]);
+
}
static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-26 09:56:19 +0000