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c8806b6c NM |
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 | ||
32 | int | |
33 | snic_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 | ||
119 | void | |
120 | snic_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 | ||
131 | void | |
132 | snic_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 | ||
146 | int | |
147 | snic_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 | ||
275 | error_cleanup: | |
276 | snic_free_vnic_res(snic); | |
277 | ||
278 | return ret; | |
279 | } | |
280 | ||
281 | void | |
282 | snic_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 */ |