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Include support for PR in scst_local.c. We return a SAS-style Protocol ID. I

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use an OUI that I think is not currently in use, so it seems unlikely that we
will clash with anyone else, but you never know. I might have to change it
later. 


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1928 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Richard Sharpe
2010-08-04 04:03:44 +00:00
parent 7b836c12aa
commit 359cdf786a
1 changed files with 107 additions and 1 deletions
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108
scst_local/scst_local.c
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@@ -27,6 +27,7 @@
#include <linux/blkdev.h>
#include <linux/completion.h>
#include <linux/stat.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -94,6 +95,9 @@ static unsigned long scst_local_trace_flag = SCST_LOCAL_DEFAULT_LOG_FLAGS;
*/
static void scst_local_remove_adapter(void);
static int scst_local_add_adapter(void);
static int scst_local_get_initiator_port_transport_id(
struct scst_session *scst_sess,
uint8_t **transport_id);
#define SCST_LOCAL_VERSION "0.9.2"
static const char *scst_local_version_date = "20090614";
@@ -634,6 +638,85 @@ static int scst_local_targ_pre_exec(struct scst_cmd *scst_cmd)
return res;
}
static int scst_local_get_initiator_port_transport_id(
struct scst_session *scst_sess,
uint8_t **transport_id)
{
int res = 0;
int tr_id_size = 0, sess = -1, i = 0;
uint8_t *tr_id = NULL;
struct scst_local_host_info *scst_lcl_host;
TRACE_ENTRY();
if (scst_sess == NULL) {
res = SCSI_TRANSPORTID_PROTOCOLID_SAS;
goto out;
}
scst_lcl_host = (struct scst_local_host_info *)
scst_sess_get_tgt_priv(scst_sess);
printk(KERN_INFO "%s: scst_lcl_host: %p\n", __func__, scst_lcl_host);
printk(KERN_INFO "%s: sess = %p\n", __func__, scst_sess);
tr_id_size = 24; /* A SAS TransportID */
printk(KERN_INFO "%s: tr_id_size: %d\n", __func__, tr_id_size);
tr_id = kzalloc(tr_id_size, GFP_KERNEL);
if (tr_id == NULL) {
PRINT_ERROR("Allocation of TransportID (size %d) failed",
tr_id_size);
printk(KERN_INFO "%s: failed to allocate space\n", __func__);
res = -ENOMEM;
goto out;
}
tr_id[0] = 0x00 | SCSI_TRANSPORTID_PROTOCOLID_SAS;
for (i = 0; i < scst_local_num_tgts; i++) {
printk(KERN_INFO "%s: session: %p\n",
__func__, scst_lcl_host->session[i]);
/*
* We are called before the session is returned below
*/
if (scst_lcl_host->session[i] == NULL) {
sess = i;
break;
}
}
if (sess == -1) {
printk(KERN_INFO "%s: Unable to find a matching session\n",
__func__);
res = -ENOENT;
goto out;
}
/*
* Assemble a valid SAS address = 0x5OOUUIIR12345678 ... Does SCST
* have one?
*/
tr_id[4] = 0x5F;
tr_id[5] = 0xEE;
tr_id[6] = 0xDE;
tr_id[7] = 0x40 | ((sess >> 4) & 0x0F);
tr_id[8] = 0x0F | (sess & 0xF0);
tr_id[9] = 0xAD;
tr_id[10] = 0xE0;
tr_id[11] = 0x50;
*transport_id = tr_id;
TRACE_DBG("Created tid '%08lX'", &tr_id[4]);
out:
TRACE_EXIT_RES(res);
return res;
}
static void scst_local_release_adapter(struct device *dev)
{
struct scst_local_host_info *scst_lcl_host;
@@ -700,7 +783,8 @@ static int scst_local_add_adapter(void)
sprintf(name, "scstlclhst%d:%d", scst_local_add_host, i);
scst_lcl_host->session[i] = scst_register_session(
scst_lcl_host->target,
0, name, NULL, NULL, NULL);
0, name, (void *)scst_lcl_host,
NULL, NULL);
if (!scst_lcl_host->session[i]) {
printk(KERN_WARNING "scst_register_session failed:\n");
error = -1;
@@ -1104,6 +1188,26 @@ static int scst_local_targ_xmit_response(struct scst_cmd *scst_cmd)
* This might have to change to use the two status flags
*/
if (scst_cmd_get_is_send_status(scst_cmd)) {
int resid = 0;
/*
* Calculate the residual ...
*/
switch (tgt_specific->cmnd->sc_data_direction) {
case DMA_TO_DEVICE:
resid = (signed)scst_cmd_get_bufflen(scst_cmd) -
scsi_bufflen(tgt_specific->cmnd);
break;
case DMA_FROM_DEVICE:
resid = (signed)scsi_bufflen(tgt_specific->cmnd) -
scst_cmd_get_resp_data_len(scst_cmd);
break;
default:
resid = 0;
break;
}
scsi_set_resid(tgt_specific->cmnd, resid);
(void)scst_local_send_resp(tgt_specific->cmnd, scst_cmd,
tgt_specific->done,
scst_cmd_get_status(scst_cmd));
@@ -1158,6 +1262,8 @@ static struct scst_tgt_template scst_local_targ_tmpl = {
.xmit_response = scst_local_targ_xmit_response,
.on_free_cmd = scst_local_targ_on_free_cmd,
.task_mgmt_fn_done = scst_local_targ_task_mgmt_done,
.get_initiator_port_transport_id
= scst_local_get_initiator_port_transport_id,
};
/*