Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 | // SPDX-License-Identifier: GPL-2.0-only // Copyright 2014 Cisco Systems, Inc. All rights reserved. #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 */ |