tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* Broadcom NetXtreme-C/E network driver.
2 *
3 * Copyright (c) 2017 Broadcom Limited
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation.
8 */
9
10#include <linux/pci.h>
11#include <linux/netdevice.h>
12#include <net/devlink.h>
13#include "bnxt_hsi.h"
14#include "bnxt.h"
15#include "bnxt_vfr.h"
16#include "bnxt_devlink.h"
17
18static const struct devlink_ops bnxt_dl_ops = {
19#ifdef CONFIG_BNXT_SRIOV
20 .eswitch_mode_set = bnxt_dl_eswitch_mode_set,
21 .eswitch_mode_get = bnxt_dl_eswitch_mode_get,
22#endif /* CONFIG_BNXT_SRIOV */
23};
24
25enum bnxt_dl_param_id {
26 BNXT_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
27 BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK,
28};
29
30static const struct bnxt_dl_nvm_param nvm_params[] = {
31 {DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV, NVM_OFF_ENABLE_SRIOV,
32 BNXT_NVM_SHARED_CFG, 1},
33 {DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI, NVM_OFF_IGNORE_ARI,
34 BNXT_NVM_SHARED_CFG, 1},
35 {DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
36 NVM_OFF_MSIX_VEC_PER_PF_MAX, BNXT_NVM_SHARED_CFG, 10},
37 {DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
38 NVM_OFF_MSIX_VEC_PER_PF_MIN, BNXT_NVM_SHARED_CFG, 7},
39 {BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK, NVM_OFF_DIS_GRE_VER_CHECK,
40 BNXT_NVM_SHARED_CFG, 1},
41};
42
43static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
44 int msg_len, union devlink_param_value *val)
45{
46 struct hwrm_nvm_get_variable_input *req = msg;
47 void *data_addr = NULL, *buf = NULL;
48 struct bnxt_dl_nvm_param nvm_param;
49 int bytesize, idx = 0, rc, i;
50 dma_addr_t data_dma_addr;
51
52 /* Get/Set NVM CFG parameter is supported only on PFs */
53 if (BNXT_VF(bp))
54 return -EPERM;
55
56 for (i = 0; i < ARRAY_SIZE(nvm_params); i++) {
57 if (nvm_params[i].id == param_id) {
58 nvm_param = nvm_params[i];
59 break;
60 }
61 }
62
63 if (i == ARRAY_SIZE(nvm_params))
64 return -EOPNOTSUPP;
65
66 if (nvm_param.dir_type == BNXT_NVM_PORT_CFG)
67 idx = bp->pf.port_id;
68 else if (nvm_param.dir_type == BNXT_NVM_FUNC_CFG)
69 idx = bp->pf.fw_fid - BNXT_FIRST_PF_FID;
70
71 bytesize = roundup(nvm_param.num_bits, BITS_PER_BYTE) / BITS_PER_BYTE;
72 switch (bytesize) {
73 case 1:
74 if (nvm_param.num_bits == 1)
75 buf = &val->vbool;
76 else
77 buf = &val->vu8;
78 break;
79 case 2:
80 buf = &val->vu16;
81 break;
82 case 4:
83 buf = &val->vu32;
84 break;
85 default:
86 return -EFAULT;
87 }
88
89 data_addr = dma_alloc_coherent(&bp->pdev->dev, bytesize,
90 &data_dma_addr, GFP_KERNEL);
91 if (!data_addr)
92 return -ENOMEM;
93
94 req->dest_data_addr = cpu_to_le64(data_dma_addr);
95 req->data_len = cpu_to_le16(nvm_param.num_bits);
96 req->option_num = cpu_to_le16(nvm_param.offset);
97 req->index_0 = cpu_to_le16(idx);
98 if (idx)
99 req->dimensions = cpu_to_le16(1);
100
101 if (req->req_type == cpu_to_le16(HWRM_NVM_SET_VARIABLE)) {
102 memcpy(data_addr, buf, bytesize);
103 rc = hwrm_send_message(bp, msg, msg_len, HWRM_CMD_TIMEOUT);
104 } else {
105 rc = hwrm_send_message_silent(bp, msg, msg_len,
106 HWRM_CMD_TIMEOUT);
107 }
108 if (!rc && req->req_type == cpu_to_le16(HWRM_NVM_GET_VARIABLE))
109 memcpy(buf, data_addr, bytesize);
110
111 dma_free_coherent(&bp->pdev->dev, bytesize, data_addr, data_dma_addr);
112 if (rc == HWRM_ERR_CODE_RESOURCE_ACCESS_DENIED) {
113 netdev_err(bp->dev, "PF does not have admin privileges to modify NVM config\n");
114 return -EACCES;
115 } else if (rc) {
116 return -EIO;
117 }
118 return 0;
119}
120
121static int bnxt_dl_nvm_param_get(struct devlink *dl, u32 id,
122 struct devlink_param_gset_ctx *ctx)
123{
124 struct hwrm_nvm_get_variable_input req = {0};
125 struct bnxt *bp = bnxt_get_bp_from_dl(dl);
126 int rc;
127
128 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_NVM_GET_VARIABLE, -1, -1);
129 rc = bnxt_hwrm_nvm_req(bp, id, &req, sizeof(req), &ctx->val);
130 if (!rc)
131 if (id == BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK)
132 ctx->val.vbool = !ctx->val.vbool;
133
134 return rc;
135}
136
137static int bnxt_dl_nvm_param_set(struct devlink *dl, u32 id,
138 struct devlink_param_gset_ctx *ctx)
139{
140 struct hwrm_nvm_set_variable_input req = {0};
141 struct bnxt *bp = bnxt_get_bp_from_dl(dl);
142
143 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_NVM_SET_VARIABLE, -1, -1);
144
145 if (id == BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK)
146 ctx->val.vbool = !ctx->val.vbool;
147
148 return bnxt_hwrm_nvm_req(bp, id, &req, sizeof(req), &ctx->val);
149}
150
151static int bnxt_dl_msix_validate(struct devlink *dl, u32 id,
152 union devlink_param_value val,
153 struct netlink_ext_ack *extack)
154{
155 int max_val = -1;
156
157 if (id == DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX)
158 max_val = BNXT_MSIX_VEC_MAX;
159
160 if (id == DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN)
161 max_val = BNXT_MSIX_VEC_MIN_MAX;
162
163 if (val.vu32 > max_val) {
164 NL_SET_ERR_MSG_MOD(extack, "MSIX value is exceeding the range");
165 return -EINVAL;
166 }
167
168 return 0;
169}
170
171static const struct devlink_param bnxt_dl_params[] = {
172 DEVLINK_PARAM_GENERIC(ENABLE_SRIOV,
173 BIT(DEVLINK_PARAM_CMODE_PERMANENT),
174 bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
175 NULL),
176 DEVLINK_PARAM_GENERIC(IGNORE_ARI,
177 BIT(DEVLINK_PARAM_CMODE_PERMANENT),
178 bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
179 NULL),
180 DEVLINK_PARAM_GENERIC(MSIX_VEC_PER_PF_MAX,
181 BIT(DEVLINK_PARAM_CMODE_PERMANENT),
182 bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
183 bnxt_dl_msix_validate),
184 DEVLINK_PARAM_GENERIC(MSIX_VEC_PER_PF_MIN,
185 BIT(DEVLINK_PARAM_CMODE_PERMANENT),
186 bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
187 bnxt_dl_msix_validate),
188 DEVLINK_PARAM_DRIVER(BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK,
189 "gre_ver_check", DEVLINK_PARAM_TYPE_BOOL,
190 BIT(DEVLINK_PARAM_CMODE_PERMANENT),
191 bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
192 NULL),
193};
194
195static const struct devlink_param bnxt_dl_port_params[] = {
196};
197
198int bnxt_dl_register(struct bnxt *bp)
199{
200 struct devlink *dl;
201 int rc;
202
203 if (bp->hwrm_spec_code < 0x10600) {
204 netdev_warn(bp->dev, "Firmware does not support NVM params");
205 return -ENOTSUPP;
206 }
207
208 dl = devlink_alloc(&bnxt_dl_ops, sizeof(struct bnxt_dl));
209 if (!dl) {
210 netdev_warn(bp->dev, "devlink_alloc failed");
211 return -ENOMEM;
212 }
213
214 bnxt_link_bp_to_dl(bp, dl);
215
216 /* Add switchdev eswitch mode setting, if SRIOV supported */
217 if (pci_find_ext_capability(bp->pdev, PCI_EXT_CAP_ID_SRIOV) &&
218 bp->hwrm_spec_code > 0x10803)
219 bp->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
220
221 rc = devlink_register(dl, &bp->pdev->dev);
222 if (rc) {
223 netdev_warn(bp->dev, "devlink_register failed. rc=%d", rc);
224 goto err_dl_free;
225 }
226
227 rc = devlink_params_register(dl, bnxt_dl_params,
228 ARRAY_SIZE(bnxt_dl_params));
229 if (rc) {
230 netdev_warn(bp->dev, "devlink_params_register failed. rc=%d",
231 rc);
232 goto err_dl_unreg;
233 }
234
235 devlink_port_attrs_set(&bp->dl_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
236 bp->pf.port_id, false, 0,
237 bp->switch_id, sizeof(bp->switch_id));
238 rc = devlink_port_register(dl, &bp->dl_port, bp->pf.port_id);
239 if (rc) {
240 netdev_err(bp->dev, "devlink_port_register failed");
241 goto err_dl_param_unreg;
242 }
243 devlink_port_type_eth_set(&bp->dl_port, bp->dev);
244
245 rc = devlink_port_params_register(&bp->dl_port, bnxt_dl_port_params,
246 ARRAY_SIZE(bnxt_dl_port_params));
247 if (rc) {
248 netdev_err(bp->dev, "devlink_port_params_register failed");
249 goto err_dl_port_unreg;
250 }
251
252 devlink_params_publish(dl);
253
254 return 0;
255
256err_dl_port_unreg:
257 devlink_port_unregister(&bp->dl_port);
258err_dl_param_unreg:
259 devlink_params_unregister(dl, bnxt_dl_params,
260 ARRAY_SIZE(bnxt_dl_params));
261err_dl_unreg:
262 devlink_unregister(dl);
263err_dl_free:
264 bnxt_link_bp_to_dl(bp, NULL);
265 devlink_free(dl);
266 return rc;
267}
268
269void bnxt_dl_unregister(struct bnxt *bp)
270{
271 struct devlink *dl = bp->dl;
272
273 if (!dl)
274 return;
275
276 devlink_port_params_unregister(&bp->dl_port, bnxt_dl_port_params,
277 ARRAY_SIZE(bnxt_dl_port_params));
278 devlink_port_unregister(&bp->dl_port);
279 devlink_params_unregister(dl, bnxt_dl_params,
280 ARRAY_SIZE(bnxt_dl_params));
281 devlink_unregister(dl);
282 devlink_free(dl);
283}