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1// SPDX-License-Identifier: GPL-2.0-only2// Copyright 2014 Cisco Systems, Inc. All rights reserved.3 4#include <linux/errno.h>5#include <linux/types.h>6#include <linux/pci.h>7 8#include "wq_enet_desc.h"9#include "cq_enet_desc.h"10#include "vnic_resource.h"11#include "vnic_dev.h"12#include "vnic_wq.h"13#include "vnic_cq.h"14#include "vnic_intr.h"15#include "vnic_stats.h"16#include "snic.h"17 18int19snic_get_vnic_config(struct snic *snic)20{21 struct vnic_snic_config *c = &snic->config;22 int ret;23 24#define GET_CONFIG(m) \25 do { \26 ret = svnic_dev_spec(snic->vdev, \27 offsetof(struct vnic_snic_config, m), \28 sizeof(c->m), \29 &c->m); \30 if (ret) { \31 SNIC_HOST_ERR(snic->shost, \32 "Error getting %s, %d\n", #m, ret); \33 return ret; \34 } \35 } while (0)36 37 GET_CONFIG(wq_enet_desc_count);38 GET_CONFIG(maxdatafieldsize);39 GET_CONFIG(intr_timer);40 GET_CONFIG(intr_timer_type);41 GET_CONFIG(flags);42 GET_CONFIG(io_throttle_count);43 GET_CONFIG(port_down_timeout);44 GET_CONFIG(port_down_io_retries);45 GET_CONFIG(luns_per_tgt);46 GET_CONFIG(xpt_type);47 GET_CONFIG(hid);48 49 c->wq_enet_desc_count = min_t(u32,50 VNIC_SNIC_WQ_DESCS_MAX,51 max_t(u32,52 VNIC_SNIC_WQ_DESCS_MIN,53 c->wq_enet_desc_count));54 55 c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);56 57 c->maxdatafieldsize = min_t(u32,58 VNIC_SNIC_MAXDATAFIELDSIZE_MAX,59 max_t(u32,60 VNIC_SNIC_MAXDATAFIELDSIZE_MIN,61 c->maxdatafieldsize));62 63 c->io_throttle_count = min_t(u32,64 VNIC_SNIC_IO_THROTTLE_COUNT_MAX,65 max_t(u32,66 VNIC_SNIC_IO_THROTTLE_COUNT_MIN,67 c->io_throttle_count));68 69 c->port_down_timeout = min_t(u32,70 VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX,71 c->port_down_timeout);72 73 c->port_down_io_retries = min_t(u32,74 VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX,75 c->port_down_io_retries);76 77 c->luns_per_tgt = min_t(u32,78 VNIC_SNIC_LUNS_PER_TARGET_MAX,79 max_t(u32,80 VNIC_SNIC_LUNS_PER_TARGET_MIN,81 c->luns_per_tgt));82 83 c->intr_timer = min_t(u32, VNIC_INTR_TIMER_MAX, c->intr_timer);84 85 SNIC_INFO("vNIC resources wq %d\n", c->wq_enet_desc_count);86 SNIC_INFO("vNIC mtu %d intr timer %d\n",87 c->maxdatafieldsize,88 c->intr_timer);89 90 SNIC_INFO("vNIC flags 0x%x luns per tgt %d\n",91 c->flags,92 c->luns_per_tgt);93 94 SNIC_INFO("vNIC io throttle count %d\n", c->io_throttle_count);95 SNIC_INFO("vNIC port down timeout %d port down io retries %d\n",96 c->port_down_timeout,97 c->port_down_io_retries);98 99 SNIC_INFO("vNIC back end type = %d\n", c->xpt_type);100 SNIC_INFO("vNIC hid = %d\n", c->hid);101 102 return 0;103}104 105void106snic_get_res_counts(struct snic *snic)107{108 snic->wq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_WQ);109 SNIC_BUG_ON(snic->wq_count == 0);110 snic->cq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_CQ);111 SNIC_BUG_ON(snic->cq_count == 0);112 snic->intr_count = svnic_dev_get_res_count(snic->vdev,113 RES_TYPE_INTR_CTRL);114 SNIC_BUG_ON(snic->intr_count == 0);115}116 117void118snic_free_vnic_res(struct snic *snic)119{120 unsigned int i;121 122 for (i = 0; i < snic->wq_count; i++)123 svnic_wq_free(&snic->wq[i]);124 125 for (i = 0; i < snic->cq_count; i++)126 svnic_cq_free(&snic->cq[i]);127 128 for (i = 0; i < snic->intr_count; i++)129 svnic_intr_free(&snic->intr[i]);130}131 132int133snic_alloc_vnic_res(struct snic *snic)134{135 enum vnic_dev_intr_mode intr_mode;136 unsigned int mask_on_assertion;137 unsigned int intr_offset;138 unsigned int err_intr_enable;139 unsigned int err_intr_offset;140 unsigned int i;141 int ret;142 143 intr_mode = svnic_dev_get_intr_mode(snic->vdev);144 145 SNIC_INFO("vNIC interrupt mode: %s\n",146 ((intr_mode == VNIC_DEV_INTR_MODE_INTX) ?147 "Legacy PCI INTx" :148 ((intr_mode == VNIC_DEV_INTR_MODE_MSI) ?149 "MSI" :150 ((intr_mode == VNIC_DEV_INTR_MODE_MSIX) ?151 "MSI-X" : "Unknown"))));152 153 /* only MSI-X is supported */154 SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);155 156 SNIC_INFO("wq %d cq %d intr %d\n", snic->wq_count,157 snic->cq_count,158 snic->intr_count);159 160 161 /* Allocate WQs used for SCSI IOs */162 for (i = 0; i < snic->wq_count; i++) {163 ret = svnic_wq_alloc(snic->vdev,164 &snic->wq[i],165 i,166 snic->config.wq_enet_desc_count,167 sizeof(struct wq_enet_desc));168 if (ret)169 goto error_cleanup;170 }171 172 /* CQ for each WQ */173 for (i = 0; i < snic->wq_count; i++) {174 ret = svnic_cq_alloc(snic->vdev,175 &snic->cq[i],176 i,177 snic->config.wq_enet_desc_count,178 sizeof(struct cq_enet_wq_desc));179 if (ret)180 goto error_cleanup;181 }182 183 SNIC_BUG_ON(snic->cq_count != 2 * snic->wq_count);184 /* CQ for FW TO host */185 for (i = snic->wq_count; i < snic->cq_count; i++) {186 ret = svnic_cq_alloc(snic->vdev,187 &snic->cq[i],188 i,189 (snic->config.wq_enet_desc_count * 3),190 sizeof(struct snic_fw_req));191 if (ret)192 goto error_cleanup;193 }194 195 for (i = 0; i < snic->intr_count; i++) {196 ret = svnic_intr_alloc(snic->vdev, &snic->intr[i], i);197 if (ret)198 goto error_cleanup;199 }200 201 /*202 * Init WQ Resources.203 * WQ[0 to n] points to CQ[0 to n-1]204 * firmware to host comm points to CQ[n to m+1]205 */206 err_intr_enable = 1;207 err_intr_offset = snic->err_intr_offset;208 209 for (i = 0; i < snic->wq_count; i++) {210 svnic_wq_init(&snic->wq[i],211 i,212 err_intr_enable,213 err_intr_offset);214 }215 216 for (i = 0; i < snic->cq_count; i++) {217 intr_offset = i;218 219 svnic_cq_init(&snic->cq[i],220 0 /* flow_control_enable */,221 1 /* color_enable */,222 0 /* cq_head */,223 0 /* cq_tail */,224 1 /* cq_tail_color */,225 1 /* interrupt_enable */,226 1 /* cq_entry_enable */,227 0 /* cq_message_enable */,228 intr_offset,229 0 /* cq_message_addr */);230 }231 232 /*233 * Init INTR resources234 * Assumption : snic is always in MSI-X mode235 */236 SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);237 mask_on_assertion = 1;238 239 for (i = 0; i < snic->intr_count; i++) {240 svnic_intr_init(&snic->intr[i],241 snic->config.intr_timer,242 snic->config.intr_timer_type,243 mask_on_assertion);244 }245 246 /* init the stats memory by making the first call here */247 ret = svnic_dev_stats_dump(snic->vdev, &snic->stats);248 if (ret) {249 SNIC_HOST_ERR(snic->shost,250 "svnic_dev_stats_dump failed - x%x\n",251 ret);252 goto error_cleanup;253 }254 255 /* Clear LIF stats */256 svnic_dev_stats_clear(snic->vdev);257 ret = 0;258 259 return ret;260 261error_cleanup:262 snic_free_vnic_res(snic);263 264 return ret;265}266 267void268snic_log_q_error(struct snic *snic)269{270 unsigned int i;271 u32 err_status;272 273 for (i = 0; i < snic->wq_count; i++) {274 err_status = ioread32(&snic->wq[i].ctrl->error_status);275 if (err_status)276 SNIC_HOST_ERR(snic->shost,277 "WQ[%d] error status %d\n",278 i,279 err_status);280 }281} /* end of snic_log_q_error */282