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Diffstat (limited to 'drivers/scsi/snic/snic_res.c')
-rw-r--r--drivers/scsi/snic/snic_res.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/drivers/scsi/snic/snic_res.c b/drivers/scsi/snic/snic_res.c
new file mode 100644
index 000000000000..b54912c8ca0c
--- /dev/null
+++ b/drivers/scsi/snic/snic_res.c
@@ -0,0 +1,295 @@
1/*
2 * Copyright 2014 Cisco Systems, Inc. All rights reserved.
3 *
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.
7 *
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
15 * SOFTWARE.
16 */
17
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/pci.h>
21
22#include "wq_enet_desc.h"
23#include "cq_enet_desc.h"
24#include "vnic_resource.h"
25#include "vnic_dev.h"
26#include "vnic_wq.h"
27#include "vnic_cq.h"
28#include "vnic_intr.h"
29#include "vnic_stats.h"
30#include "snic.h"
31
32int
33snic_get_vnic_config(struct snic *snic)
34{
35 struct vnic_snic_config *c = &snic->config;
36 int ret;
37
38#define GET_CONFIG(m) \
39 do { \
40 ret = svnic_dev_spec(snic->vdev, \
41 offsetof(struct vnic_snic_config, m), \
42 sizeof(c->m), \
43 &c->m); \
44 if (ret) { \
45 SNIC_HOST_ERR(snic->shost, \
46 "Error getting %s, %d\n", #m, ret); \
47 return ret; \
48 } \
49 } while (0)
50
51 GET_CONFIG(wq_enet_desc_count);
52 GET_CONFIG(maxdatafieldsize);
53 GET_CONFIG(intr_timer);
54 GET_CONFIG(intr_timer_type);
55 GET_CONFIG(flags);
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);
60 GET_CONFIG(xpt_type);
61 GET_CONFIG(hid);
62
63 c->wq_enet_desc_count = min_t(u32,
64 VNIC_SNIC_WQ_DESCS_MAX,
65 max_t(u32,
66 VNIC_SNIC_WQ_DESCS_MIN,
67 c->wq_enet_desc_count));
68
69 c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
70
71 c->maxdatafieldsize = min_t(u32,
72 VNIC_SNIC_MAXDATAFIELDSIZE_MAX,
73 max_t(u32,
74 VNIC_SNIC_MAXDATAFIELDSIZE_MIN,
75 c->maxdatafieldsize));
76
77 c->io_throttle_count = min_t(u32,
78 VNIC_SNIC_IO_THROTTLE_COUNT_MAX,
79 max_t(u32,
80 VNIC_SNIC_IO_THROTTLE_COUNT_MIN,
81 c->io_throttle_count));
82
83 c->port_down_timeout = min_t(u32,
84 VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX,
85 c->port_down_timeout);
86
87 c->port_down_io_retries = min_t(u32,
88 VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX,
89 c->port_down_io_retries);
90
91 c->luns_per_tgt = min_t(u32,
92 VNIC_SNIC_LUNS_PER_TARGET_MAX,
93 max_t(u32,
94 VNIC_SNIC_LUNS_PER_TARGET_MIN,
95 c->luns_per_tgt));
96
97 c->intr_timer = min_t(u32, VNIC_INTR_TIMER_MAX, c->intr_timer);
98
99 SNIC_INFO("vNIC resources wq %d\n", c->wq_enet_desc_count);
100 SNIC_INFO("vNIC mtu %d intr timer %d\n",
101 c->maxdatafieldsize,
102 c->intr_timer);
103
104 SNIC_INFO("vNIC flags 0x%x luns per tgt %d\n",
105 c->flags,
106 c->luns_per_tgt);
107
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);
112
113 SNIC_INFO("vNIC back end type = %d\n", c->xpt_type);
114 SNIC_INFO("vNIC hid = %d\n", c->hid);
115
116 return 0;
117}
118
119void
120snic_get_res_counts(struct snic *snic)
121{
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,
127 RES_TYPE_INTR_CTRL);
128 SNIC_BUG_ON(snic->intr_count == 0);
129}
130
131void
132snic_free_vnic_res(struct snic *snic)
133{
134 unsigned int i;
135
136 for (i = 0; i < snic->wq_count; i++)
137 svnic_wq_free(&snic->wq[i]);
138
139 for (i = 0; i < snic->cq_count; i++)
140 svnic_cq_free(&snic->cq[i]);
141
142 for (i = 0; i < snic->intr_count; i++)
143 svnic_intr_free(&snic->intr[i]);
144}
145
146int
147snic_alloc_vnic_res(struct snic *snic)
148{
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;
154 unsigned int i;
155 int ret;
156
157 intr_mode = svnic_dev_get_intr_mode(snic->vdev);
158
159 SNIC_INFO("vNIC interrupt mode: %s\n",
160 ((intr_mode == VNIC_DEV_INTR_MODE_INTX) ?
161 "Legacy PCI INTx" :
162 ((intr_mode == VNIC_DEV_INTR_MODE_MSI) ?
163 "MSI" :
164 ((intr_mode == VNIC_DEV_INTR_MODE_MSIX) ?
165 "MSI-X" : "Unknown"))));
166
167 /* only MSI-X is supported */
168 SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
169
170 SNIC_INFO("wq %d cq %d intr %d\n", snic->wq_count,
171 snic->cq_count,
172 snic->intr_count);
173
174
175 /* Allocate WQs used for SCSI IOs */
176 for (i = 0; i < snic->wq_count; i++) {
177 ret = svnic_wq_alloc(snic->vdev,
178 &snic->wq[i],
179 i,
180 snic->config.wq_enet_desc_count,
181 sizeof(struct wq_enet_desc));
182 if (ret)
183 goto error_cleanup;
184 }
185
186 /* CQ for each WQ */
187 for (i = 0; i < snic->wq_count; i++) {
188 ret = svnic_cq_alloc(snic->vdev,
189 &snic->cq[i],
190 i,
191 snic->config.wq_enet_desc_count,
192 sizeof(struct cq_enet_wq_desc));
193 if (ret)
194 goto error_cleanup;
195 }
196
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,
201 &snic->cq[i],
202 i,
203 (snic->config.wq_enet_desc_count * 3),
204 sizeof(struct snic_fw_req));
205 if (ret)
206 goto error_cleanup;
207 }
208
209 for (i = 0; i < snic->intr_count; i++) {
210 ret = svnic_intr_alloc(snic->vdev, &snic->intr[i], i);
211 if (ret)
212 goto error_cleanup;
213 }
214
215 /*
216 * Init WQ Resources.
217 * WQ[0 to n] points to CQ[0 to n-1]
218 * firmware to host comm points to CQ[n to m+1]
219 */
220 err_intr_enable = 1;
221 err_intr_offset = snic->err_intr_offset;
222
223 for (i = 0; i < snic->wq_count; i++) {
224 svnic_wq_init(&snic->wq[i],
225 i,
226 err_intr_enable,
227 err_intr_offset);
228 }
229
230 for (i = 0; i < snic->cq_count; i++) {
231 intr_offset = i;
232
233 svnic_cq_init(&snic->cq[i],
234 0 /* flow_control_enable */,
235 1 /* color_enable */,
236 0 /* cq_head */,
237 0 /* cq_tail */,
238 1 /* cq_tail_color */,
239 1 /* interrupt_enable */,
240 1 /* cq_entry_enable */,
241 0 /* cq_message_enable */,
242 intr_offset,
243 0 /* cq_message_addr */);
244 }
245
246 /*
247 * Init INTR resources
248 * Assumption : snic is always in MSI-X mode
249 */
250 SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
251 mask_on_assertion = 1;
252
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,
257 mask_on_assertion);
258 }
259
260 /* init the stats memory by making the first call here */
261 ret = svnic_dev_stats_dump(snic->vdev, &snic->stats);
262 if (ret) {
263 SNIC_HOST_ERR(snic->shost,
264 "svnic_dev_stats_dump failed - x%x\n",
265 ret);
266 goto error_cleanup;
267 }
268
269 /* Clear LIF stats */
270 svnic_dev_stats_clear(snic->vdev);
271 ret = 0;
272
273 return ret;
274
275error_cleanup:
276 snic_free_vnic_res(snic);
277
278 return ret;
279}
280
281void
282snic_log_q_error(struct snic *snic)
283{
284 unsigned int i;
285 u32 err_status;
286
287 for (i = 0; i < snic->wq_count; i++) {
288 err_status = ioread32(&snic->wq[i].ctrl->error_status);
289 if (err_status)
290 SNIC_HOST_ERR(snic->shost,
291 "WQ[%d] error status %d\n",
292 i,
293 err_status);
294 }
295} /* end of snic_log_q_error */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-08 17:05:47 -0500