mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Christophe JAILLET](/assets/img/avatar_default.png)
'ret' is known to be 0 here. No error code is available so just remove
'ret' from the error message.
While at it, change the word "Queuing" into "Init" which looks more
appropriate.
Link: https://lore.kernel.org/r/3b9d5d767e09d03a07bede293a6ba32e3735cd1a.1620326191.git.christophe.jaillet@wanadoo.fr
Fixes: c8806b6c9e
("snic: driver for Cisco SCSI HBA")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
271 lines
7 KiB
C
271 lines
7 KiB
C
/*
|
|
* Copyright 2014 Cisco Systems, Inc. All rights reserved.
|
|
*
|
|
* This program is free software; you may 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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mempool.h>
|
|
#include <scsi/scsi_tcq.h>
|
|
#include <linux/ctype.h>
|
|
|
|
#include "snic_io.h"
|
|
#include "snic.h"
|
|
#include "cq_enet_desc.h"
|
|
#include "snic_fwint.h"
|
|
|
|
/*
|
|
* snic_handle_link : Handles link flaps.
|
|
*/
|
|
void
|
|
snic_handle_link(struct work_struct *work)
|
|
{
|
|
struct snic *snic = container_of(work, struct snic, link_work);
|
|
|
|
if (snic->config.xpt_type == SNIC_DAS)
|
|
return;
|
|
|
|
snic->link_status = svnic_dev_link_status(snic->vdev);
|
|
snic->link_down_cnt = svnic_dev_link_down_cnt(snic->vdev);
|
|
SNIC_HOST_INFO(snic->shost, "Link Event: Link %s.\n",
|
|
((snic->link_status) ? "Up" : "Down"));
|
|
|
|
SNIC_ASSERT_NOT_IMPL(1);
|
|
}
|
|
|
|
|
|
/*
|
|
* snic_ver_enc : Encodes version str to int
|
|
* version string is similar to netmask string
|
|
*/
|
|
static int
|
|
snic_ver_enc(const char *s)
|
|
{
|
|
int v[4] = {0};
|
|
int i = 0, x = 0;
|
|
char c;
|
|
const char *p = s;
|
|
|
|
/* validate version string */
|
|
if ((strlen(s) > 15) || (strlen(s) < 7))
|
|
goto end;
|
|
|
|
while ((c = *p++)) {
|
|
if (c == '.') {
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
if (i > 3 || !isdigit(c))
|
|
goto end;
|
|
|
|
v[i] = v[i] * 10 + (c - '0');
|
|
}
|
|
|
|
/* validate sub version numbers */
|
|
for (i = 3; i >= 0; i--)
|
|
if (v[i] > 0xff)
|
|
goto end;
|
|
|
|
x |= (v[0] << 24) | v[1] << 16 | v[2] << 8 | v[3];
|
|
|
|
end:
|
|
if (x == 0) {
|
|
SNIC_ERR("Invalid version string [%s].\n", s);
|
|
|
|
return -1;
|
|
}
|
|
|
|
return x;
|
|
} /* end of snic_ver_enc */
|
|
|
|
/*
|
|
* snic_qeueue_exch_ver_req :
|
|
*
|
|
* Queues Exchange Version Request, to communicate host information
|
|
* in return, it gets firmware version details
|
|
*/
|
|
int
|
|
snic_queue_exch_ver_req(struct snic *snic)
|
|
{
|
|
struct snic_req_info *rqi = NULL;
|
|
struct snic_host_req *req = NULL;
|
|
u32 ver = 0;
|
|
int ret = 0;
|
|
|
|
SNIC_HOST_INFO(snic->shost, "Exch Ver Req Preparing...\n");
|
|
|
|
rqi = snic_req_init(snic, 0);
|
|
if (!rqi) {
|
|
SNIC_HOST_ERR(snic->shost, "Init Exch Ver Req failed\n");
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
req = rqi_to_req(rqi);
|
|
|
|
/* Initialize snic_host_req */
|
|
snic_io_hdr_enc(&req->hdr, SNIC_REQ_EXCH_VER, 0, SCSI_NO_TAG,
|
|
snic->config.hid, 0, (ulong)rqi);
|
|
ver = snic_ver_enc(SNIC_DRV_VERSION);
|
|
req->u.exch_ver.drvr_ver = cpu_to_le32(ver);
|
|
req->u.exch_ver.os_type = cpu_to_le32(SNIC_OS_LINUX);
|
|
|
|
snic_handle_untagged_req(snic, rqi);
|
|
|
|
ret = snic_queue_wq_desc(snic, req, sizeof(*req));
|
|
if (ret) {
|
|
snic_release_untagged_req(snic, rqi);
|
|
SNIC_HOST_ERR(snic->shost,
|
|
"Queuing Exch Ver Req failed, err = %d\n",
|
|
ret);
|
|
goto error;
|
|
}
|
|
|
|
SNIC_HOST_INFO(snic->shost, "Exch Ver Req is issued. ret = %d\n", ret);
|
|
|
|
error:
|
|
return ret;
|
|
} /* end of snic_queue_exch_ver_req */
|
|
|
|
/*
|
|
* snic_io_exch_ver_cmpl_handler
|
|
*/
|
|
void
|
|
snic_io_exch_ver_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
|
|
{
|
|
struct snic_req_info *rqi = NULL;
|
|
struct snic_exch_ver_rsp *exv_cmpl = &fwreq->u.exch_ver_cmpl;
|
|
u8 typ, hdr_stat;
|
|
u32 cmnd_id, hid, max_sgs;
|
|
ulong ctx = 0;
|
|
unsigned long flags;
|
|
|
|
SNIC_HOST_INFO(snic->shost, "Exch Ver Compl Received.\n");
|
|
snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
|
|
SNIC_BUG_ON(snic->config.hid != hid);
|
|
rqi = (struct snic_req_info *) ctx;
|
|
|
|
if (hdr_stat) {
|
|
SNIC_HOST_ERR(snic->shost,
|
|
"Exch Ver Completed w/ err status %d\n",
|
|
hdr_stat);
|
|
|
|
goto exch_cmpl_end;
|
|
}
|
|
|
|
spin_lock_irqsave(&snic->snic_lock, flags);
|
|
snic->fwinfo.fw_ver = le32_to_cpu(exv_cmpl->version);
|
|
snic->fwinfo.hid = le32_to_cpu(exv_cmpl->hid);
|
|
snic->fwinfo.max_concur_ios = le32_to_cpu(exv_cmpl->max_concur_ios);
|
|
snic->fwinfo.max_sgs_per_cmd = le32_to_cpu(exv_cmpl->max_sgs_per_cmd);
|
|
snic->fwinfo.max_io_sz = le32_to_cpu(exv_cmpl->max_io_sz);
|
|
snic->fwinfo.max_tgts = le32_to_cpu(exv_cmpl->max_tgts);
|
|
snic->fwinfo.io_tmo = le16_to_cpu(exv_cmpl->io_timeout);
|
|
|
|
SNIC_HOST_INFO(snic->shost,
|
|
"vers %u hid %u max_concur_ios %u max_sgs_per_cmd %u max_io_sz %u max_tgts %u fw tmo %u\n",
|
|
snic->fwinfo.fw_ver,
|
|
snic->fwinfo.hid,
|
|
snic->fwinfo.max_concur_ios,
|
|
snic->fwinfo.max_sgs_per_cmd,
|
|
snic->fwinfo.max_io_sz,
|
|
snic->fwinfo.max_tgts,
|
|
snic->fwinfo.io_tmo);
|
|
|
|
SNIC_HOST_INFO(snic->shost,
|
|
"HBA Capabilities = 0x%x\n",
|
|
le32_to_cpu(exv_cmpl->hba_cap));
|
|
|
|
/* Updating SGList size */
|
|
max_sgs = snic->fwinfo.max_sgs_per_cmd;
|
|
if (max_sgs && max_sgs < SNIC_MAX_SG_DESC_CNT) {
|
|
snic->shost->sg_tablesize = max_sgs;
|
|
SNIC_HOST_INFO(snic->shost, "Max SGs set to %d\n",
|
|
snic->shost->sg_tablesize);
|
|
} else if (max_sgs > snic->shost->sg_tablesize) {
|
|
SNIC_HOST_INFO(snic->shost,
|
|
"Target type %d Supports Larger Max SGList %d than driver's Max SG List %d.\n",
|
|
snic->config.xpt_type, max_sgs,
|
|
snic->shost->sg_tablesize);
|
|
}
|
|
|
|
if (snic->shost->can_queue > snic->fwinfo.max_concur_ios)
|
|
snic->shost->can_queue = snic->fwinfo.max_concur_ios;
|
|
|
|
snic->shost->max_sectors = snic->fwinfo.max_io_sz >> 9;
|
|
if (snic->fwinfo.wait)
|
|
complete(snic->fwinfo.wait);
|
|
|
|
spin_unlock_irqrestore(&snic->snic_lock, flags);
|
|
|
|
exch_cmpl_end:
|
|
snic_release_untagged_req(snic, rqi);
|
|
|
|
SNIC_HOST_INFO(snic->shost, "Exch_cmpl Done, hdr_stat %d.\n", hdr_stat);
|
|
} /* end of snic_io_exch_ver_cmpl_handler */
|
|
|
|
/*
|
|
* snic_get_conf
|
|
*
|
|
* Synchronous call, and Retrieves snic params.
|
|
*/
|
|
int
|
|
snic_get_conf(struct snic *snic)
|
|
{
|
|
DECLARE_COMPLETION_ONSTACK(wait);
|
|
unsigned long flags;
|
|
int ret;
|
|
int nr_retries = 3;
|
|
|
|
SNIC_HOST_INFO(snic->shost, "Retrieving snic params.\n");
|
|
spin_lock_irqsave(&snic->snic_lock, flags);
|
|
memset(&snic->fwinfo, 0, sizeof(snic->fwinfo));
|
|
snic->fwinfo.wait = &wait;
|
|
spin_unlock_irqrestore(&snic->snic_lock, flags);
|
|
|
|
/* Additional delay to handle HW Resource initialization. */
|
|
msleep(50);
|
|
|
|
/*
|
|
* Exch ver req can be ignored by FW, if HW Resource initialization
|
|
* is in progress, Hence retry.
|
|
*/
|
|
do {
|
|
ret = snic_queue_exch_ver_req(snic);
|
|
if (ret)
|
|
return ret;
|
|
|
|
wait_for_completion_timeout(&wait, msecs_to_jiffies(2000));
|
|
spin_lock_irqsave(&snic->snic_lock, flags);
|
|
ret = (snic->fwinfo.fw_ver != 0) ? 0 : -ETIMEDOUT;
|
|
if (ret)
|
|
SNIC_HOST_ERR(snic->shost,
|
|
"Failed to retrieve snic params,\n");
|
|
|
|
/* Unset fwinfo.wait, on success or on last retry */
|
|
if (ret == 0 || nr_retries == 1)
|
|
snic->fwinfo.wait = NULL;
|
|
|
|
spin_unlock_irqrestore(&snic->snic_lock, flags);
|
|
} while (ret && --nr_retries);
|
|
|
|
return ret;
|
|
} /* end of snic_get_info */
|