2 * Copyright 2014 Cisco Systems, Inc. All rights reserved.
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
18 #include <linux/errno.h>
19 #include <linux/types.h>
20 #include <linux/pci.h>
22 #include "wq_enet_desc.h"
23 #include "cq_enet_desc.h"
24 #include "vnic_resource.h"
28 #include "vnic_intr.h"
29 #include "vnic_stats.h"
33 snic_get_vnic_config(struct snic *snic)
35 struct vnic_snic_config *c = &snic->config;
38 #define GET_CONFIG(m) \
40 ret = svnic_dev_spec(snic->vdev, \
41 offsetof(struct vnic_snic_config, m), \
45 SNIC_HOST_ERR(snic->shost, \
46 "Error getting %s, %d\n", #m, ret); \
51 GET_CONFIG(wq_enet_desc_count);
52 GET_CONFIG(maxdatafieldsize);
53 GET_CONFIG(intr_timer);
54 GET_CONFIG(intr_timer_type);
56 GET_CONFIG(io_throttle_count);
57 GET_CONFIG(port_down_timeout);
58 GET_CONFIG(port_down_io_retries);
59 GET_CONFIG(luns_per_tgt);
63 c->wq_enet_desc_count = min_t(u32,
64 VNIC_SNIC_WQ_DESCS_MAX,
66 VNIC_SNIC_WQ_DESCS_MIN,
67 c->wq_enet_desc_count));
69 c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
71 c->maxdatafieldsize = min_t(u32,
72 VNIC_SNIC_MAXDATAFIELDSIZE_MAX,
74 VNIC_SNIC_MAXDATAFIELDSIZE_MIN,
75 c->maxdatafieldsize));
77 c->io_throttle_count = min_t(u32,
78 VNIC_SNIC_IO_THROTTLE_COUNT_MAX,
80 VNIC_SNIC_IO_THROTTLE_COUNT_MIN,
81 c->io_throttle_count));
83 c->port_down_timeout = min_t(u32,
84 VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX,
85 c->port_down_timeout);
87 c->port_down_io_retries = min_t(u32,
88 VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX,
89 c->port_down_io_retries);
91 c->luns_per_tgt = min_t(u32,
92 VNIC_SNIC_LUNS_PER_TARGET_MAX,
94 VNIC_SNIC_LUNS_PER_TARGET_MIN,
97 c->intr_timer = min_t(u32, VNIC_INTR_TIMER_MAX, c->intr_timer);
99 SNIC_INFO("vNIC resources wq %d\n", c->wq_enet_desc_count);
100 SNIC_INFO("vNIC mtu %d intr timer %d\n",
104 SNIC_INFO("vNIC flags 0x%x luns per tgt %d\n",
108 SNIC_INFO("vNIC io throttle count %d\n", c->io_throttle_count);
109 SNIC_INFO("vNIC port down timeout %d port down io retries %d\n",
110 c->port_down_timeout,
111 c->port_down_io_retries);
113 SNIC_INFO("vNIC back end type = %d\n", c->xpt_type);
114 SNIC_INFO("vNIC hid = %d\n", c->hid);
120 snic_get_res_counts(struct snic *snic)
122 snic->wq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_WQ);
123 SNIC_BUG_ON(snic->wq_count == 0);
124 snic->cq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_CQ);
125 SNIC_BUG_ON(snic->cq_count == 0);
126 snic->intr_count = svnic_dev_get_res_count(snic->vdev,
128 SNIC_BUG_ON(snic->intr_count == 0);
132 snic_free_vnic_res(struct snic *snic)
136 for (i = 0; i < snic->wq_count; i++)
137 svnic_wq_free(&snic->wq[i]);
139 for (i = 0; i < snic->cq_count; i++)
140 svnic_cq_free(&snic->cq[i]);
142 for (i = 0; i < snic->intr_count; i++)
143 svnic_intr_free(&snic->intr[i]);
147 snic_alloc_vnic_res(struct snic *snic)
149 enum vnic_dev_intr_mode intr_mode;
150 unsigned int mask_on_assertion;
151 unsigned int intr_offset;
152 unsigned int err_intr_enable;
153 unsigned int err_intr_offset;
157 intr_mode = svnic_dev_get_intr_mode(snic->vdev);
159 SNIC_INFO("vNIC interrupt mode: %s\n",
160 ((intr_mode == VNIC_DEV_INTR_MODE_INTX) ?
162 ((intr_mode == VNIC_DEV_INTR_MODE_MSI) ?
164 ((intr_mode == VNIC_DEV_INTR_MODE_MSIX) ?
165 "MSI-X" : "Unknown"))));
167 /* only MSI-X is supported */
168 SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
170 SNIC_INFO("wq %d cq %d intr %d\n", snic->wq_count,
175 /* Allocate WQs used for SCSI IOs */
176 for (i = 0; i < snic->wq_count; i++) {
177 ret = svnic_wq_alloc(snic->vdev,
180 snic->config.wq_enet_desc_count,
181 sizeof(struct wq_enet_desc));
187 for (i = 0; i < snic->wq_count; i++) {
188 ret = svnic_cq_alloc(snic->vdev,
191 snic->config.wq_enet_desc_count,
192 sizeof(struct cq_enet_wq_desc));
197 SNIC_BUG_ON(snic->cq_count != 2 * snic->wq_count);
198 /* CQ for FW TO host */
199 for (i = snic->wq_count; i < snic->cq_count; i++) {
200 ret = svnic_cq_alloc(snic->vdev,
203 (snic->config.wq_enet_desc_count * 3),
204 sizeof(struct snic_fw_req));
209 for (i = 0; i < snic->intr_count; i++) {
210 ret = svnic_intr_alloc(snic->vdev, &snic->intr[i], i);
217 * WQ[0 to n] points to CQ[0 to n-1]
218 * firmware to host comm points to CQ[n to m+1]
221 err_intr_offset = snic->err_intr_offset;
223 for (i = 0; i < snic->wq_count; i++) {
224 svnic_wq_init(&snic->wq[i],
230 for (i = 0; i < snic->cq_count; i++) {
233 svnic_cq_init(&snic->cq[i],
234 0 /* flow_control_enable */,
235 1 /* color_enable */,
238 1 /* cq_tail_color */,
239 1 /* interrupt_enable */,
240 1 /* cq_entry_enable */,
241 0 /* cq_message_enable */,
243 0 /* cq_message_addr */);
247 * Init INTR resources
248 * Assumption : snic is always in MSI-X mode
250 SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
251 mask_on_assertion = 1;
253 for (i = 0; i < snic->intr_count; i++) {
254 svnic_intr_init(&snic->intr[i],
255 snic->config.intr_timer,
256 snic->config.intr_timer_type,
260 /* init the stats memory by making the first call here */
261 ret = svnic_dev_stats_dump(snic->vdev, &snic->stats);
263 SNIC_HOST_ERR(snic->shost,
264 "svnic_dev_stats_dump failed - x%x\n",
269 /* Clear LIF stats */
270 svnic_dev_stats_clear(snic->vdev);
276 snic_free_vnic_res(snic);
282 snic_log_q_error(struct snic *snic)
287 for (i = 0; i < snic->wq_count; i++) {
288 err_status = ioread32(&snic->wq[i].ctrl->error_status);
290 SNIC_HOST_ERR(snic->shost,
291 "WQ[%d] error status %d\n",
295 } /* end of snic_log_q_error */