Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * This program is free software; you may redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * it under the terms of the GNU General Public License as published by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * the Free Software Foundation; version 2 of the License.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/mempool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <scsi/scsi_tcq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include "snic_io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include "snic.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include "cq_enet_desc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include "snic_fwint.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  * snic_handle_link : Handles link flaps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) snic_handle_link(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct snic *snic = container_of(work, struct snic, link_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	if (snic->config.xpt_type == SNIC_DAS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	snic->link_status = svnic_dev_link_status(snic->vdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	snic->link_down_cnt = svnic_dev_link_down_cnt(snic->vdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	SNIC_HOST_INFO(snic->shost, "Link Event: Link %s.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		       ((snic->link_status) ? "Up" : "Down"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	SNIC_ASSERT_NOT_IMPL(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * snic_ver_enc : Encodes version str to int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * version string is similar to netmask string
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) snic_ver_enc(const char *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	int v[4] = {0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int  i = 0, x = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	const char *p = s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	/* validate version string */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	if ((strlen(s) > 15) || (strlen(s) < 7))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	while ((c = *p++)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		if (c == '.') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		if (i > 3 || !isdigit(c))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 			goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		v[i] = v[i] * 10 + (c - '0');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	/* validate sub version numbers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	for (i = 3; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		if (v[i] > 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	x |= (v[0] << 24) | v[1] << 16 | v[2] << 8 | v[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (x == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		SNIC_ERR("Invalid version string [%s].\n", s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	return x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) } /* end of snic_ver_enc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)  * snic_qeueue_exch_ver_req :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * Queues Exchange Version Request, to communicate host information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  * in return, it gets firmware version details
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) snic_queue_exch_ver_req(struct snic *snic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct snic_req_info *rqi = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	struct snic_host_req *req = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	u32 ver = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	SNIC_HOST_INFO(snic->shost, "Exch Ver Req Preparing...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	rqi = snic_req_init(snic, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	if (!rqi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		SNIC_HOST_ERR(snic->shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			      "Queuing Exch Ver Req failed, err = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			      ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	req = rqi_to_req(rqi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	/* Initialize snic_host_req */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	snic_io_hdr_enc(&req->hdr, SNIC_REQ_EXCH_VER, 0, SCSI_NO_TAG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			snic->config.hid, 0, (ulong)rqi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	ver = snic_ver_enc(SNIC_DRV_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	req->u.exch_ver.drvr_ver = cpu_to_le32(ver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	req->u.exch_ver.os_type = cpu_to_le32(SNIC_OS_LINUX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	snic_handle_untagged_req(snic, rqi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	ret = snic_queue_wq_desc(snic, req, sizeof(*req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		snic_release_untagged_req(snic, rqi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		SNIC_HOST_ERR(snic->shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			      "Queuing Exch Ver Req failed, err = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			      ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	SNIC_HOST_INFO(snic->shost, "Exch Ver Req is issued. ret = %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) } /* end of snic_queue_exch_ver_req */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  * snic_io_exch_ver_cmpl_handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) snic_io_exch_ver_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	struct snic_req_info *rqi = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	struct snic_exch_ver_rsp *exv_cmpl = &fwreq->u.exch_ver_cmpl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	u8 typ, hdr_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	u32 cmnd_id, hid, max_sgs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	ulong ctx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	SNIC_HOST_INFO(snic->shost, "Exch Ver Compl Received.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	snic_io_hdr_dec(&fwreq->hdr, &typ, &hdr_stat, &cmnd_id, &hid, &ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	SNIC_BUG_ON(snic->config.hid != hid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	rqi = (struct snic_req_info *) ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (hdr_stat) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		SNIC_HOST_ERR(snic->shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			      "Exch Ver Completed w/ err status %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			      hdr_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		goto exch_cmpl_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	spin_lock_irqsave(&snic->snic_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	snic->fwinfo.fw_ver = le32_to_cpu(exv_cmpl->version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	snic->fwinfo.hid = le32_to_cpu(exv_cmpl->hid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	snic->fwinfo.max_concur_ios = le32_to_cpu(exv_cmpl->max_concur_ios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	snic->fwinfo.max_sgs_per_cmd = le32_to_cpu(exv_cmpl->max_sgs_per_cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	snic->fwinfo.max_io_sz = le32_to_cpu(exv_cmpl->max_io_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	snic->fwinfo.max_tgts = le32_to_cpu(exv_cmpl->max_tgts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	snic->fwinfo.io_tmo = le16_to_cpu(exv_cmpl->io_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	SNIC_HOST_INFO(snic->shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		       "vers %u hid %u max_concur_ios %u max_sgs_per_cmd %u max_io_sz %u max_tgts %u fw tmo %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		       snic->fwinfo.fw_ver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		       snic->fwinfo.hid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		       snic->fwinfo.max_concur_ios,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		       snic->fwinfo.max_sgs_per_cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		       snic->fwinfo.max_io_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		       snic->fwinfo.max_tgts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		       snic->fwinfo.io_tmo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	SNIC_HOST_INFO(snic->shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		       "HBA Capabilities = 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		       le32_to_cpu(exv_cmpl->hba_cap));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	/* Updating SGList size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	max_sgs = snic->fwinfo.max_sgs_per_cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	if (max_sgs && max_sgs < SNIC_MAX_SG_DESC_CNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		snic->shost->sg_tablesize = max_sgs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		SNIC_HOST_INFO(snic->shost, "Max SGs set to %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			       snic->shost->sg_tablesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	} else if (max_sgs > snic->shost->sg_tablesize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		SNIC_HOST_INFO(snic->shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 			       "Target type %d Supports Larger Max SGList %d than driver's Max SG List %d.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			       snic->config.xpt_type, max_sgs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 			       snic->shost->sg_tablesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (snic->shost->can_queue > snic->fwinfo.max_concur_ios)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		snic->shost->can_queue = snic->fwinfo.max_concur_ios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	snic->shost->max_sectors = snic->fwinfo.max_io_sz >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (snic->fwinfo.wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		complete(snic->fwinfo.wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	spin_unlock_irqrestore(&snic->snic_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) exch_cmpl_end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	snic_release_untagged_req(snic, rqi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	SNIC_HOST_INFO(snic->shost, "Exch_cmpl Done, hdr_stat %d.\n", hdr_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) } /* end of snic_io_exch_ver_cmpl_handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)  * snic_get_conf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  * Synchronous call, and Retrieves snic params.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) snic_get_conf(struct snic *snic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	DECLARE_COMPLETION_ONSTACK(wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	int nr_retries = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	SNIC_HOST_INFO(snic->shost, "Retrieving snic params.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	spin_lock_irqsave(&snic->snic_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	memset(&snic->fwinfo, 0, sizeof(snic->fwinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	snic->fwinfo.wait = &wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	spin_unlock_irqrestore(&snic->snic_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	/* Additional delay to handle HW Resource initialization. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	msleep(50);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	 * Exch ver req can be ignored by FW, if HW Resource initialization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	 * is in progress, Hence retry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		ret = snic_queue_exch_ver_req(snic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		wait_for_completion_timeout(&wait, msecs_to_jiffies(2000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		spin_lock_irqsave(&snic->snic_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		ret = (snic->fwinfo.fw_ver != 0) ? 0 : -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 			SNIC_HOST_ERR(snic->shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 				      "Failed to retrieve snic params,\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		/* Unset fwinfo.wait, on success or on last retry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		if (ret == 0 || nr_retries == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 			snic->fwinfo.wait = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		spin_unlock_irqrestore(&snic->snic_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	} while (ret && --nr_retries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) } /* end of snic_get_info */