1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
4  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
5  */
6 
7 #include <linux/kernel.h>
8 #include <linux/errno.h>
9 #include <linux/types.h>
10 #include <linux/pci.h>
11 #include <linux/netdevice.h>
12 
13 #include "wq_enet_desc.h"
14 #include "rq_enet_desc.h"
15 #include "cq_enet_desc.h"
16 #include "vnic_resource.h"
17 #include "vnic_enet.h"
18 #include "vnic_dev.h"
19 #include "vnic_wq.h"
20 #include "vnic_rq.h"
21 #include "vnic_cq.h"
22 #include "vnic_intr.h"
23 #include "vnic_stats.h"
24 #include "vnic_nic.h"
25 #include "vnic_rss.h"
26 #include "enic_res.h"
27 #include "enic.h"
28 
29 int enic_get_vnic_config(struct enic *enic)
30 {
31 	struct vnic_enet_config *c = &enic->config;
32 	int err;
33 
34 	err = vnic_dev_get_mac_addr(enic->vdev, enic->mac_addr);
35 	if (err) {
36 		dev_err(enic_get_dev(enic),
37 			"Error getting MAC addr, %d\n", err);
38 		return err;
39 	}
40 
41 #define GET_CONFIG(m) \
42 	do { \
43 		err = vnic_dev_spec(enic->vdev, \
44 			offsetof(struct vnic_enet_config, m), \
45 			sizeof(c->m), &c->m); \
46 		if (err) { \
47 			dev_err(enic_get_dev(enic), \
48 				"Error getting %s, %d\n", #m, err); \
49 			return err; \
50 		} \
51 	} while (0)
52 
53 	GET_CONFIG(flags);
54 	GET_CONFIG(wq_desc_count);
55 	GET_CONFIG(rq_desc_count);
56 	GET_CONFIG(mtu);
57 	GET_CONFIG(intr_timer_type);
58 	GET_CONFIG(intr_mode);
59 	GET_CONFIG(intr_timer_usec);
60 	GET_CONFIG(loop_tag);
61 	GET_CONFIG(num_arfs);
62 
63 	c->wq_desc_count =
64 		min_t(u32, ENIC_MAX_WQ_DESCS,
65 		max_t(u32, ENIC_MIN_WQ_DESCS,
66 		c->wq_desc_count));
67 	c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
68 
69 	c->rq_desc_count =
70 		min_t(u32, ENIC_MAX_RQ_DESCS,
71 		max_t(u32, ENIC_MIN_RQ_DESCS,
72 		c->rq_desc_count));
73 	c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
74 
75 	if (c->mtu == 0)
76 		c->mtu = 1500;
77 	c->mtu = min_t(u16, ENIC_MAX_MTU,
78 		max_t(u16, ENIC_MIN_MTU,
79 		c->mtu));
80 
81 	c->intr_timer_usec = min_t(u32, c->intr_timer_usec,
82 		vnic_dev_get_intr_coal_timer_max(enic->vdev));
83 
84 	dev_info(enic_get_dev(enic),
85 		"vNIC MAC addr %pM wq/rq %d/%d mtu %d\n",
86 		enic->mac_addr, c->wq_desc_count, c->rq_desc_count, c->mtu);
87 
88 	dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s "
89 		"tso/lro %s/%s rss %s intr mode %s type %s timer %d usec "
90 		"loopback tag 0x%04x\n",
91 		ENIC_SETTING(enic, TXCSUM) ? "yes" : "no",
92 		ENIC_SETTING(enic, RXCSUM) ? "yes" : "no",
93 		ENIC_SETTING(enic, TSO) ? "yes" : "no",
94 		ENIC_SETTING(enic, LRO) ? "yes" : "no",
95 		ENIC_SETTING(enic, RSS) ? "yes" : "no",
96 		c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" :
97 		c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" :
98 		c->intr_mode == VENET_INTR_MODE_ANY ? "any" :
99 		"unknown",
100 		c->intr_timer_type == VENET_INTR_TYPE_MIN ? "min" :
101 		c->intr_timer_type == VENET_INTR_TYPE_IDLE ? "idle" :
102 		"unknown",
103 		c->intr_timer_usec,
104 		c->loop_tag);
105 
106 	return 0;
107 }
108 
109 int enic_add_vlan(struct enic *enic, u16 vlanid)
110 {
111 	u64 a0 = vlanid, a1 = 0;
112 	int wait = 1000;
113 	int err;
114 
115 	err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
116 	if (err)
117 		dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err);
118 
119 	return err;
120 }
121 
122 int enic_del_vlan(struct enic *enic, u16 vlanid)
123 {
124 	u64 a0 = vlanid, a1 = 0;
125 	int wait = 1000;
126 	int err;
127 
128 	err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
129 	if (err)
130 		dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err);
131 
132 	return err;
133 }
134 
135 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
136 	u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
137 	u8 ig_vlan_strip_en)
138 {
139 	enum vnic_devcmd_cmd cmd = CMD_NIC_CFG;
140 	u64 a0, a1;
141 	u32 nic_cfg;
142 	int wait = 1000;
143 
144 	vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
145 		rss_hash_type, rss_hash_bits, rss_base_cpu,
146 		rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
147 
148 	a0 = nic_cfg;
149 	a1 = 0;
150 
151 	if (rss_hash_type & (NIC_CFG_RSS_HASH_TYPE_UDP_IPV4 |
152 			     NIC_CFG_RSS_HASH_TYPE_UDP_IPV6))
153 		cmd = CMD_NIC_CFG_CHK;
154 
155 	return vnic_dev_cmd(enic->vdev, cmd, &a0, &a1, wait);
156 }
157 
158 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
159 {
160 	u64 a0 = (u64)key_pa, a1 = len;
161 	int wait = 1000;
162 
163 	return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
164 }
165 
166 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
167 {
168 	u64 a0 = (u64)cpu_pa, a1 = len;
169 	int wait = 1000;
170 
171 	return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
172 }
173 
174 void enic_free_vnic_resources(struct enic *enic)
175 {
176 	unsigned int i;
177 
178 	for (i = 0; i < enic->wq_count; i++)
179 		vnic_wq_free(&enic->wq[i]);
180 	for (i = 0; i < enic->rq_count; i++)
181 		vnic_rq_free(&enic->rq[i]);
182 	for (i = 0; i < enic->cq_count; i++)
183 		vnic_cq_free(&enic->cq[i]);
184 	for (i = 0; i < enic->intr_count; i++)
185 		vnic_intr_free(&enic->intr[i]);
186 }
187 
188 void enic_get_res_counts(struct enic *enic)
189 {
190 	enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
191 	enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
192 	enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
193 	enic->intr_count = vnic_dev_get_res_count(enic->vdev,
194 		RES_TYPE_INTR_CTRL);
195 
196 	dev_info(enic_get_dev(enic),
197 		"vNIC resources avail: wq %d rq %d cq %d intr %d\n",
198 		enic->wq_count, enic->rq_count,
199 		enic->cq_count, enic->intr_count);
200 }
201 
202 void enic_init_vnic_resources(struct enic *enic)
203 {
204 	enum vnic_dev_intr_mode intr_mode;
205 	unsigned int mask_on_assertion;
206 	unsigned int interrupt_offset;
207 	unsigned int error_interrupt_enable;
208 	unsigned int error_interrupt_offset;
209 	unsigned int cq_index;
210 	unsigned int i;
211 
212 	intr_mode = vnic_dev_get_intr_mode(enic->vdev);
213 
214 	/* Init RQ/WQ resources.
215 	 *
216 	 * RQ[0 - n-1] point to CQ[0 - n-1]
217 	 * WQ[0 - m-1] point to CQ[n - n+m-1]
218 	 *
219 	 * Error interrupt is not enabled for MSI.
220 	 */
221 
222 	switch (intr_mode) {
223 	case VNIC_DEV_INTR_MODE_INTX:
224 	case VNIC_DEV_INTR_MODE_MSIX:
225 		error_interrupt_enable = 1;
226 		error_interrupt_offset = enic->intr_count - 2;
227 		break;
228 	default:
229 		error_interrupt_enable = 0;
230 		error_interrupt_offset = 0;
231 		break;
232 	}
233 
234 	for (i = 0; i < enic->rq_count; i++) {
235 		cq_index = i;
236 		vnic_rq_init(&enic->rq[i],
237 			cq_index,
238 			error_interrupt_enable,
239 			error_interrupt_offset);
240 	}
241 
242 	for (i = 0; i < enic->wq_count; i++) {
243 		cq_index = enic->rq_count + i;
244 		vnic_wq_init(&enic->wq[i],
245 			cq_index,
246 			error_interrupt_enable,
247 			error_interrupt_offset);
248 	}
249 
250 	/* Init CQ resources
251 	 *
252 	 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
253 	 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
254 	 */
255 
256 	for (i = 0; i < enic->cq_count; i++) {
257 
258 		switch (intr_mode) {
259 		case VNIC_DEV_INTR_MODE_MSIX:
260 			interrupt_offset = i;
261 			break;
262 		default:
263 			interrupt_offset = 0;
264 			break;
265 		}
266 
267 		vnic_cq_init(&enic->cq[i],
268 			0 /* flow_control_enable */,
269 			1 /* color_enable */,
270 			0 /* cq_head */,
271 			0 /* cq_tail */,
272 			1 /* cq_tail_color */,
273 			1 /* interrupt_enable */,
274 			1 /* cq_entry_enable */,
275 			0 /* cq_message_enable */,
276 			interrupt_offset,
277 			0 /* cq_message_addr */);
278 	}
279 
280 	/* Init INTR resources
281 	 *
282 	 * mask_on_assertion is not used for INTx due to the level-
283 	 * triggered nature of INTx
284 	 */
285 
286 	switch (intr_mode) {
287 	case VNIC_DEV_INTR_MODE_MSI:
288 	case VNIC_DEV_INTR_MODE_MSIX:
289 		mask_on_assertion = 1;
290 		break;
291 	default:
292 		mask_on_assertion = 0;
293 		break;
294 	}
295 
296 	for (i = 0; i < enic->intr_count; i++) {
297 		vnic_intr_init(&enic->intr[i],
298 			enic->config.intr_timer_usec,
299 			enic->config.intr_timer_type,
300 			mask_on_assertion);
301 	}
302 }
303 
304 int enic_alloc_vnic_resources(struct enic *enic)
305 {
306 	enum vnic_dev_intr_mode intr_mode;
307 	unsigned int i;
308 	int err;
309 
310 	intr_mode = vnic_dev_get_intr_mode(enic->vdev);
311 
312 	dev_info(enic_get_dev(enic), "vNIC resources used:  "
313 		"wq %d rq %d cq %d intr %d intr mode %s\n",
314 		enic->wq_count, enic->rq_count,
315 		enic->cq_count, enic->intr_count,
316 		intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
317 		intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
318 		intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
319 		"unknown");
320 
321 	/* Allocate queue resources
322 	 */
323 
324 	for (i = 0; i < enic->wq_count; i++) {
325 		err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
326 			enic->config.wq_desc_count,
327 			sizeof(struct wq_enet_desc));
328 		if (err)
329 			goto err_out_cleanup;
330 	}
331 
332 	for (i = 0; i < enic->rq_count; i++) {
333 		err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
334 			enic->config.rq_desc_count,
335 			sizeof(struct rq_enet_desc));
336 		if (err)
337 			goto err_out_cleanup;
338 	}
339 
340 	for (i = 0; i < enic->cq_count; i++) {
341 		if (i < enic->rq_count)
342 			err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
343 				enic->config.rq_desc_count,
344 				sizeof(struct cq_enet_rq_desc));
345 		else
346 			err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
347 				enic->config.wq_desc_count,
348 				sizeof(struct cq_enet_wq_desc));
349 		if (err)
350 			goto err_out_cleanup;
351 	}
352 
353 	for (i = 0; i < enic->intr_count; i++) {
354 		err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
355 		if (err)
356 			goto err_out_cleanup;
357 	}
358 
359 	/* Hook remaining resource
360 	 */
361 
362 	enic->legacy_pba = vnic_dev_get_res(enic->vdev,
363 		RES_TYPE_INTR_PBA_LEGACY, 0);
364 	if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
365 		dev_err(enic_get_dev(enic),
366 			"Failed to hook legacy pba resource\n");
367 		err = -ENODEV;
368 		goto err_out_cleanup;
369 	}
370 
371 	return 0;
372 
373 err_out_cleanup:
374 	enic_free_vnic_resources(enic);
375 
376 	return err;
377 }
378