1// SPDX-License-Identifier: GPL-2.0-only
2// 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
18int
19snic_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
105void
106snic_get_res_counts(struct snic *snic)
107{
108 snic->wq_count = svnic_dev_get_res_count(vdev: snic->vdev, type: RES_TYPE_WQ);
109 SNIC_BUG_ON(snic->wq_count == 0);
110 snic->cq_count = svnic_dev_get_res_count(vdev: snic->vdev, type: RES_TYPE_CQ);
111 SNIC_BUG_ON(snic->cq_count == 0);
112 snic->intr_count = svnic_dev_get_res_count(vdev: snic->vdev,
113 type: RES_TYPE_INTR_CTRL);
114 SNIC_BUG_ON(snic->intr_count == 0);
115}
116
117void
118snic_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(wq: &snic->wq[i]);
124
125 for (i = 0; i < snic->cq_count; i++)
126 svnic_cq_free(cq: &snic->cq[i]);
127
128 for (i = 0; i < snic->intr_count; i++)
129 svnic_intr_free(&snic->intr[i]);
130}
131
132int
133snic_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(vdev: 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(vdev: snic->vdev,
164 wq: &snic->wq[i],
165 index: i,
166 desc_count: snic->config.wq_enet_desc_count,
167 desc_size: 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(vdev: snic->vdev,
175 cq: &snic->cq[i],
176 index: i,
177 desc_count: snic->config.wq_enet_desc_count,
178 desc_size: 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(vdev: snic->vdev,
187 cq: &snic->cq[i],
188 index: i,
189 desc_count: (snic->config.wq_enet_desc_count * 3),
190 desc_size: 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(wq: &snic->wq[i],
211 cq_index: i,
212 error_interrupt_enable: err_intr_enable,
213 error_interrupt_offset: err_intr_offset);
214 }
215
216 for (i = 0; i < snic->cq_count; i++) {
217 intr_offset = i;
218
219 svnic_cq_init(cq: &snic->cq[i],
220 flow_control_enable: 0 /* flow_control_enable */,
221 color_enable: 1 /* color_enable */,
222 cq_head: 0 /* cq_head */,
223 cq_tail: 0 /* cq_tail */,
224 cq_tail_color: 1 /* cq_tail_color */,
225 interrupt_enable: 1 /* interrupt_enable */,
226 cq_entry_enable: 1 /* cq_entry_enable */,
227 message_enable: 0 /* cq_message_enable */,
228 interrupt_offset: intr_offset,
229 message_addr: 0 /* cq_message_addr */);
230 }
231
232 /*
233 * Init INTR resources
234 * Assumption : snic is always in MSI-X mode
235 */
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(intr: &snic->intr[i],
241 coalescing_timer: snic->config.intr_timer,
242 coalescing_type: 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(vdev: snic->vdev, stats: &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(vdev: snic->vdev);
257 ret = 0;
258
259 return ret;
260
261error_cleanup:
262 snic_free_vnic_res(snic);
263
264 return ret;
265}
266
267void
268snic_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

source code of linux/drivers/scsi/snic/snic_res.c