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qla2x00t-32gbit, target: Backport to kernel v3.11 and before

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Note: this code has not yet been tested.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8115 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2019-03-31 16:26:45 +00:00
parent 89e7abc377
commit 0c1d1f8c98
3 changed files with 26 additions and 5 deletions
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qla2x00t-32gbit/qla2x00-target/scst_qla2xxx.c
+16 -4
View File
@@ -445,7 +445,7 @@ static void sqa_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
sbitmap_queue_clear(&sqa_tgt->tgt_tag_pool, cmd->se_cmd.map_tag,
cmd->se_cmd.map_cpu);
#else
#error Neither percpu_ida nor sbitmap are available.
clear_bit(cmd->map_tag, sqa_tgt->tgt_tag_pool);
#endif
}
@@ -463,7 +463,16 @@ static struct qla_tgt_cmd *sqa_qla2xxx_get_cmd(struct fc_port *sess)
tag = sbitmap_queue_get(&sqa_tgt->tgt_tag_pool, &cpu);
#else
#error Neither percpu_ida nor sbitmap are available.
for (;;) {
tag = find_first_zero_bit(sqa_tgt->tgt_tag_pool,
sqa_tgt->tag_num);
if (test_and_set_bit(tag, sqa_tgt->tgt_tag_pool) == 0)
break;
if (tag >= sqa_tgt->tag_num) {
tag = -ENOENT;
break;
}
}
#endif
if (tag < 0)
return NULL;
@@ -1464,10 +1473,13 @@ static int sqa_init_scst_tgt(struct scsi_qla_host *vha)
res = sbitmap_queue_init_node(&sqa_tgt->tgt_tag_pool, tag_num, -1,
false, GFP_KERNEL, NUMA_NO_NODE);
#else
#error Neither percpu_ida nor sbitmap are available.
sqa_tgt->tag_num = tag_num;
sqa_tgt->tgt_tag_pool = kzalloc(BITS_TO_LONGS(tag_num), GFP_KERNEL);
res = IS_ERR(sqa_tgt->tgt_tag_pool) ? PTR_ERR(sqa_tgt->tgt_tag_pool) :
0;
#endif
if (res < 0) {
pr_err("Unable to init se_sess->sess_tag_pool,"
pr_err("Unable to init se_sess->tgt_tag_pool,"
" tag_num: %u\n", tag_num);
kvfree(sqa_tgt->tgt_cmd_map);
kfree(pwwn);
qla2x00t-32gbit/qla2x00-target/scst_qla2xxx.h
+3 -1
View File
@@ -3,6 +3,7 @@
!(defined(RHEL_MAJOR) && RHEL_MAJOR -0 >= 7)
#define QLT_USE_PERCPU_IDA 0
#define QLT_USE_SBITMAP 0
#include <linux/bitmap.h>
#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
#define QLT_USE_PERCPU_IDA 1
#define QLT_USE_SBITMAP 0
@@ -30,6 +31,7 @@ struct sqa_scst_tgt{
#elif QLT_USE_SBITMAP
struct sbitmap_queue tgt_tag_pool;
#else
#error Neither percpu_ida nor sbitmap are available.
unsigned long *tgt_tag_pool;
unsigned int tag_num;
#endif
};
qla2x00t-32gbit/qla_target.h
+7
View File
@@ -899,6 +899,13 @@ struct qla_tgt_cmd {
uint8_t cmd_type;
uint8_t pad[7];
struct se_cmd se_cmd;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0)
/*
* Used if neither <linux/bitmap.h> nor <linux/percpu_ida.h> are
* available.
*/
unsigned int map_tag;
#endif
#if !HAVE_SE_CMD_TAG
u64 tag;
#endif