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dfb99b050e
Based on the normalized pattern:
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
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
258 lines
6.4 KiB
C
258 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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// Copyright 2014 Cisco Systems, Inc. All rights reserved.
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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#include <linux/mempool.h>
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#include <scsi/scsi_tcq.h>
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#include <linux/ctype.h>
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#include "snic_io.h"
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#include "snic.h"
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#include "cq_enet_desc.h"
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#include "snic_fwint.h"
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/*
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* snic_handle_link : Handles link flaps.
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*/
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void
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snic_handle_link(struct work_struct *work)
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{
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struct snic *snic = container_of(work, struct snic, link_work);
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if (snic->config.xpt_type == SNIC_DAS)
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return;
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snic->link_status = svnic_dev_link_status(snic->vdev);
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snic->link_down_cnt = svnic_dev_link_down_cnt(snic->vdev);
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SNIC_HOST_INFO(snic->shost, "Link Event: Link %s.\n",
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((snic->link_status) ? "Up" : "Down"));
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SNIC_ASSERT_NOT_IMPL(1);
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}
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/*
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* snic_ver_enc : Encodes version str to int
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* version string is similar to netmask string
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*/
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static int
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snic_ver_enc(const char *s)
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{
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int v[4] = {0};
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int i = 0, x = 0;
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char c;
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const char *p = s;
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/* validate version string */
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if ((strlen(s) > 15) || (strlen(s) < 7))
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goto end;
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while ((c = *p++)) {
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if (c == '.') {
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i++;
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continue;
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}
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if (i > 3 || !isdigit(c))
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goto end;
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v[i] = v[i] * 10 + (c - '0');
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}
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/* validate sub version numbers */
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for (i = 3; i >= 0; i--)
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if (v[i] > 0xff)
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goto end;
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x |= (v[0] << 24) | v[1] << 16 | v[2] << 8 | v[3];
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end:
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if (x == 0) {
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SNIC_ERR("Invalid version string [%s].\n", s);
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return -1;
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}
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return x;
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} /* end of snic_ver_enc */
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/*
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* snic_qeueue_exch_ver_req :
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*
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* Queues Exchange Version Request, to communicate host information
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* in return, it gets firmware version details
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*/
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int
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snic_queue_exch_ver_req(struct snic *snic)
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{
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struct snic_req_info *rqi = NULL;
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struct snic_host_req *req = NULL;
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u32 ver = 0;
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int ret = 0;
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SNIC_HOST_INFO(snic->shost, "Exch Ver Req Preparing...\n");
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rqi = snic_req_init(snic, 0);
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if (!rqi) {
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SNIC_HOST_ERR(snic->shost, "Init Exch Ver Req failed\n");
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ret = -ENOMEM;
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goto error;
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}
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req = rqi_to_req(rqi);
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/* Initialize snic_host_req */
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snic_io_hdr_enc(&req->hdr, SNIC_REQ_EXCH_VER, 0, SCSI_NO_TAG,
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snic->config.hid, 0, (ulong)rqi);
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ver = snic_ver_enc(SNIC_DRV_VERSION);
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req->u.exch_ver.drvr_ver = cpu_to_le32(ver);
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req->u.exch_ver.os_type = cpu_to_le32(SNIC_OS_LINUX);
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snic_handle_untagged_req(snic, rqi);
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ret = snic_queue_wq_desc(snic, req, sizeof(*req));
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if (ret) {
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snic_release_untagged_req(snic, rqi);
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SNIC_HOST_ERR(snic->shost,
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"Queuing Exch Ver Req failed, err = %d\n",
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ret);
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goto error;
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}
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SNIC_HOST_INFO(snic->shost, "Exch Ver Req is issued. ret = %d\n", ret);
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error:
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return ret;
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} /* end of snic_queue_exch_ver_req */
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/*
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* snic_io_exch_ver_cmpl_handler
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*/
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void
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snic_io_exch_ver_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
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{
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struct snic_req_info *rqi = NULL;
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struct snic_exch_ver_rsp *exv_cmpl = &fwreq->u.exch_ver_cmpl;
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u8 typ, hdr_stat;
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u32 cmnd_id, hid, max_sgs;
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ulong ctx = 0;
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unsigned long flags;
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SNIC_HOST_INFO(snic->shost, "Exch Ver Compl Received.\n");
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snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
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SNIC_BUG_ON(snic->config.hid != hid);
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rqi = (struct snic_req_info *) ctx;
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if (hdr_stat) {
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SNIC_HOST_ERR(snic->shost,
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"Exch Ver Completed w/ err status %d\n",
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hdr_stat);
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goto exch_cmpl_end;
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}
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spin_lock_irqsave(&snic->snic_lock, flags);
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snic->fwinfo.fw_ver = le32_to_cpu(exv_cmpl->version);
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snic->fwinfo.hid = le32_to_cpu(exv_cmpl->hid);
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snic->fwinfo.max_concur_ios = le32_to_cpu(exv_cmpl->max_concur_ios);
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snic->fwinfo.max_sgs_per_cmd = le32_to_cpu(exv_cmpl->max_sgs_per_cmd);
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snic->fwinfo.max_io_sz = le32_to_cpu(exv_cmpl->max_io_sz);
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snic->fwinfo.max_tgts = le32_to_cpu(exv_cmpl->max_tgts);
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snic->fwinfo.io_tmo = le16_to_cpu(exv_cmpl->io_timeout);
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SNIC_HOST_INFO(snic->shost,
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"vers %u hid %u max_concur_ios %u max_sgs_per_cmd %u max_io_sz %u max_tgts %u fw tmo %u\n",
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snic->fwinfo.fw_ver,
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snic->fwinfo.hid,
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snic->fwinfo.max_concur_ios,
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snic->fwinfo.max_sgs_per_cmd,
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snic->fwinfo.max_io_sz,
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snic->fwinfo.max_tgts,
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snic->fwinfo.io_tmo);
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SNIC_HOST_INFO(snic->shost,
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"HBA Capabilities = 0x%x\n",
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le32_to_cpu(exv_cmpl->hba_cap));
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/* Updating SGList size */
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max_sgs = snic->fwinfo.max_sgs_per_cmd;
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if (max_sgs && max_sgs < SNIC_MAX_SG_DESC_CNT) {
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snic->shost->sg_tablesize = max_sgs;
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SNIC_HOST_INFO(snic->shost, "Max SGs set to %d\n",
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snic->shost->sg_tablesize);
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} else if (max_sgs > snic->shost->sg_tablesize) {
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SNIC_HOST_INFO(snic->shost,
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"Target type %d Supports Larger Max SGList %d than driver's Max SG List %d.\n",
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snic->config.xpt_type, max_sgs,
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snic->shost->sg_tablesize);
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}
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if (snic->shost->can_queue > snic->fwinfo.max_concur_ios)
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snic->shost->can_queue = snic->fwinfo.max_concur_ios;
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snic->shost->max_sectors = snic->fwinfo.max_io_sz >> 9;
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if (snic->fwinfo.wait)
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complete(snic->fwinfo.wait);
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spin_unlock_irqrestore(&snic->snic_lock, flags);
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exch_cmpl_end:
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snic_release_untagged_req(snic, rqi);
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SNIC_HOST_INFO(snic->shost, "Exch_cmpl Done, hdr_stat %d.\n", hdr_stat);
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} /* end of snic_io_exch_ver_cmpl_handler */
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/*
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* snic_get_conf
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*
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* Synchronous call, and Retrieves snic params.
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*/
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int
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snic_get_conf(struct snic *snic)
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{
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DECLARE_COMPLETION_ONSTACK(wait);
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unsigned long flags;
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int ret;
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int nr_retries = 3;
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SNIC_HOST_INFO(snic->shost, "Retrieving snic params.\n");
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spin_lock_irqsave(&snic->snic_lock, flags);
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memset(&snic->fwinfo, 0, sizeof(snic->fwinfo));
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snic->fwinfo.wait = &wait;
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spin_unlock_irqrestore(&snic->snic_lock, flags);
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/* Additional delay to handle HW Resource initialization. */
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msleep(50);
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/*
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* Exch ver req can be ignored by FW, if HW Resource initialization
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* is in progress, Hence retry.
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*/
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do {
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ret = snic_queue_exch_ver_req(snic);
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if (ret)
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return ret;
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wait_for_completion_timeout(&wait, msecs_to_jiffies(2000));
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spin_lock_irqsave(&snic->snic_lock, flags);
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ret = (snic->fwinfo.fw_ver != 0) ? 0 : -ETIMEDOUT;
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if (ret)
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SNIC_HOST_ERR(snic->shost,
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"Failed to retrieve snic params,\n");
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/* Unset fwinfo.wait, on success or on last retry */
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if (ret == 0 || nr_retries == 1)
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snic->fwinfo.wait = NULL;
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spin_unlock_irqrestore(&snic->snic_lock, flags);
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} while (ret && --nr_retries);
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return ret;
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} /* end of snic_get_info */
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