mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
271 lines
7.0 KiB
271 lines
7.0 KiB
/* |
|
* 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 */
|
|
|