1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 2 /*
3 * Copyright Gavin Shan, IBM Corporation 2016. 3 * Copyright Gavin Shan, IBM Corporation 2016.
4 */ 4 */
5 5
6 #include <linux/module.h> 6 #include <linux/module.h>
7 #include <linux/kernel.h> 7 #include <linux/kernel.h>
8 #include <linux/init.h> 8 #include <linux/init.h>
9 #include <linux/etherdevice.h> 9 #include <linux/etherdevice.h>
10 #include <linux/netdevice.h> 10 #include <linux/netdevice.h>
11 #include <linux/skbuff.h> 11 #include <linux/skbuff.h>
12 12
13 #include <net/ncsi.h> 13 #include <net/ncsi.h>
14 #include <net/net_namespace.h> 14 #include <net/net_namespace.h>
15 #include <net/sock.h> 15 #include <net/sock.h>
16 #include <net/genetlink.h> 16 #include <net/genetlink.h>
17 17
18 #include "internal.h" 18 #include "internal.h"
19 #include "ncsi-pkt.h" 19 #include "ncsi-pkt.h"
20 20
21 static const int padding_bytes = 26; 21 static const int padding_bytes = 26;
22 22
23 u32 ncsi_calculate_checksum(unsigned char *dat 23 u32 ncsi_calculate_checksum(unsigned char *data, int len)
24 { 24 {
25 u32 checksum = 0; 25 u32 checksum = 0;
26 int i; 26 int i;
27 27
28 for (i = 0; i < len; i += 2) 28 for (i = 0; i < len; i += 2)
29 checksum += (((u32)data[i] << 29 checksum += (((u32)data[i] << 8) | data[i + 1]);
30 30
31 checksum = (~checksum + 1); 31 checksum = (~checksum + 1);
32 return checksum; 32 return checksum;
33 } 33 }
34 34
35 /* This function should be called after the da 35 /* This function should be called after the data area has been
36 * populated completely. 36 * populated completely.
37 */ 37 */
38 static void ncsi_cmd_build_header(struct ncsi_ 38 static void ncsi_cmd_build_header(struct ncsi_pkt_hdr *h,
39 struct ncsi_ 39 struct ncsi_cmd_arg *nca)
40 { 40 {
41 u32 checksum; 41 u32 checksum;
42 __be32 *pchecksum; 42 __be32 *pchecksum;
43 43
44 h->mc_id = 0; 44 h->mc_id = 0;
45 h->revision = NCSI_PKT_REVISION; 45 h->revision = NCSI_PKT_REVISION;
46 h->reserved = 0; 46 h->reserved = 0;
47 h->id = nca->id; 47 h->id = nca->id;
48 h->type = nca->type; 48 h->type = nca->type;
49 h->channel = NCSI_TO_CHANNEL(nca- 49 h->channel = NCSI_TO_CHANNEL(nca->package,
50 nca- 50 nca->channel);
51 h->length = htons(nca->payload); 51 h->length = htons(nca->payload);
52 h->reserved1[0] = 0; 52 h->reserved1[0] = 0;
53 h->reserved1[1] = 0; 53 h->reserved1[1] = 0;
54 54
55 /* Fill with calculated checksum */ 55 /* Fill with calculated checksum */
56 checksum = ncsi_calculate_checksum((un 56 checksum = ncsi_calculate_checksum((unsigned char *)h,
57 siz 57 sizeof(*h) + nca->payload);
58 pchecksum = (__be32 *)((void *)h + siz 58 pchecksum = (__be32 *)((void *)h + sizeof(struct ncsi_pkt_hdr) +
59 ALIGN(nca->payload, 4)); 59 ALIGN(nca->payload, 4));
60 *pchecksum = htonl(checksum); 60 *pchecksum = htonl(checksum);
61 } 61 }
62 62
63 static int ncsi_cmd_handler_default(struct sk_ 63 static int ncsi_cmd_handler_default(struct sk_buff *skb,
64 struct ncs 64 struct ncsi_cmd_arg *nca)
65 { 65 {
66 struct ncsi_cmd_pkt *cmd; 66 struct ncsi_cmd_pkt *cmd;
67 67
68 cmd = skb_put_zero(skb, sizeof(*cmd)); 68 cmd = skb_put_zero(skb, sizeof(*cmd));
69 ncsi_cmd_build_header(&cmd->cmd.common 69 ncsi_cmd_build_header(&cmd->cmd.common, nca);
70 70
71 return 0; 71 return 0;
72 } 72 }
73 73
74 static int ncsi_cmd_handler_sp(struct sk_buff 74 static int ncsi_cmd_handler_sp(struct sk_buff *skb,
75 struct ncsi_cmd 75 struct ncsi_cmd_arg *nca)
76 { 76 {
77 struct ncsi_cmd_sp_pkt *cmd; 77 struct ncsi_cmd_sp_pkt *cmd;
78 78
79 cmd = skb_put_zero(skb, sizeof(*cmd)); 79 cmd = skb_put_zero(skb, sizeof(*cmd));
80 cmd->hw_arbitration = nca->bytes[0]; 80 cmd->hw_arbitration = nca->bytes[0];
81 ncsi_cmd_build_header(&cmd->cmd.common 81 ncsi_cmd_build_header(&cmd->cmd.common, nca);
82 82
83 return 0; 83 return 0;
84 } 84 }
85 85
86 static int ncsi_cmd_handler_dc(struct sk_buff 86 static int ncsi_cmd_handler_dc(struct sk_buff *skb,
87 struct ncsi_cmd 87 struct ncsi_cmd_arg *nca)
88 { 88 {
89 struct ncsi_cmd_dc_pkt *cmd; 89 struct ncsi_cmd_dc_pkt *cmd;
90 90
91 cmd = skb_put_zero(skb, sizeof(*cmd)); 91 cmd = skb_put_zero(skb, sizeof(*cmd));
92 cmd->ald = nca->bytes[0]; 92 cmd->ald = nca->bytes[0];
93 ncsi_cmd_build_header(&cmd->cmd.common 93 ncsi_cmd_build_header(&cmd->cmd.common, nca);
94 94
95 return 0; 95 return 0;
96 } 96 }
97 97
98 static int ncsi_cmd_handler_rc(struct sk_buff 98 static int ncsi_cmd_handler_rc(struct sk_buff *skb,
99 struct ncsi_cmd 99 struct ncsi_cmd_arg *nca)
100 { 100 {
101 struct ncsi_cmd_rc_pkt *cmd; 101 struct ncsi_cmd_rc_pkt *cmd;
102 102
103 cmd = skb_put_zero(skb, sizeof(*cmd)); 103 cmd = skb_put_zero(skb, sizeof(*cmd));
104 ncsi_cmd_build_header(&cmd->cmd.common 104 ncsi_cmd_build_header(&cmd->cmd.common, nca);
105 105
106 return 0; 106 return 0;
107 } 107 }
108 108
109 static int ncsi_cmd_handler_ae(struct sk_buff 109 static int ncsi_cmd_handler_ae(struct sk_buff *skb,
110 struct ncsi_cmd 110 struct ncsi_cmd_arg *nca)
111 { 111 {
112 struct ncsi_cmd_ae_pkt *cmd; 112 struct ncsi_cmd_ae_pkt *cmd;
113 113
114 cmd = skb_put_zero(skb, sizeof(*cmd)); 114 cmd = skb_put_zero(skb, sizeof(*cmd));
115 cmd->mc_id = nca->bytes[0]; 115 cmd->mc_id = nca->bytes[0];
116 cmd->mode = htonl(nca->dwords[1]); 116 cmd->mode = htonl(nca->dwords[1]);
117 ncsi_cmd_build_header(&cmd->cmd.common 117 ncsi_cmd_build_header(&cmd->cmd.common, nca);
118 118
119 return 0; 119 return 0;
120 } 120 }
121 121
122 static int ncsi_cmd_handler_sl(struct sk_buff 122 static int ncsi_cmd_handler_sl(struct sk_buff *skb,
123 struct ncsi_cmd 123 struct ncsi_cmd_arg *nca)
124 { 124 {
125 struct ncsi_cmd_sl_pkt *cmd; 125 struct ncsi_cmd_sl_pkt *cmd;
126 126
127 cmd = skb_put_zero(skb, sizeof(*cmd)); 127 cmd = skb_put_zero(skb, sizeof(*cmd));
128 cmd->mode = htonl(nca->dwords[0]); 128 cmd->mode = htonl(nca->dwords[0]);
129 cmd->oem_mode = htonl(nca->dwords[1]); 129 cmd->oem_mode = htonl(nca->dwords[1]);
130 ncsi_cmd_build_header(&cmd->cmd.common 130 ncsi_cmd_build_header(&cmd->cmd.common, nca);
131 131
132 return 0; 132 return 0;
133 } 133 }
134 134
135 static int ncsi_cmd_handler_svf(struct sk_buff 135 static int ncsi_cmd_handler_svf(struct sk_buff *skb,
136 struct ncsi_cm 136 struct ncsi_cmd_arg *nca)
137 { 137 {
138 struct ncsi_cmd_svf_pkt *cmd; 138 struct ncsi_cmd_svf_pkt *cmd;
139 139
140 cmd = skb_put_zero(skb, sizeof(*cmd)); 140 cmd = skb_put_zero(skb, sizeof(*cmd));
141 cmd->vlan = htons(nca->words[1]); 141 cmd->vlan = htons(nca->words[1]);
142 cmd->index = nca->bytes[6]; 142 cmd->index = nca->bytes[6];
143 cmd->enable = nca->bytes[7]; 143 cmd->enable = nca->bytes[7];
144 ncsi_cmd_build_header(&cmd->cmd.common 144 ncsi_cmd_build_header(&cmd->cmd.common, nca);
145 145
146 return 0; 146 return 0;
147 } 147 }
148 148
149 static int ncsi_cmd_handler_ev(struct sk_buff 149 static int ncsi_cmd_handler_ev(struct sk_buff *skb,
150 struct ncsi_cmd 150 struct ncsi_cmd_arg *nca)
151 { 151 {
152 struct ncsi_cmd_ev_pkt *cmd; 152 struct ncsi_cmd_ev_pkt *cmd;
153 153
154 cmd = skb_put_zero(skb, sizeof(*cmd)); 154 cmd = skb_put_zero(skb, sizeof(*cmd));
155 cmd->mode = nca->bytes[3]; 155 cmd->mode = nca->bytes[3];
156 ncsi_cmd_build_header(&cmd->cmd.common 156 ncsi_cmd_build_header(&cmd->cmd.common, nca);
157 157
158 return 0; 158 return 0;
159 } 159 }
160 160
161 static int ncsi_cmd_handler_sma(struct sk_buff 161 static int ncsi_cmd_handler_sma(struct sk_buff *skb,
162 struct ncsi_cm 162 struct ncsi_cmd_arg *nca)
163 { 163 {
164 struct ncsi_cmd_sma_pkt *cmd; 164 struct ncsi_cmd_sma_pkt *cmd;
165 int i; 165 int i;
166 166
167 cmd = skb_put_zero(skb, sizeof(*cmd)); 167 cmd = skb_put_zero(skb, sizeof(*cmd));
168 for (i = 0; i < 6; i++) 168 for (i = 0; i < 6; i++)
169 cmd->mac[i] = nca->bytes[i]; 169 cmd->mac[i] = nca->bytes[i];
170 cmd->index = nca->bytes[6]; 170 cmd->index = nca->bytes[6];
171 cmd->at_e = nca->bytes[7]; 171 cmd->at_e = nca->bytes[7];
172 ncsi_cmd_build_header(&cmd->cmd.common 172 ncsi_cmd_build_header(&cmd->cmd.common, nca);
173 173
174 return 0; 174 return 0;
175 } 175 }
176 176
177 static int ncsi_cmd_handler_ebf(struct sk_buff 177 static int ncsi_cmd_handler_ebf(struct sk_buff *skb,
178 struct ncsi_cm 178 struct ncsi_cmd_arg *nca)
179 { 179 {
180 struct ncsi_cmd_ebf_pkt *cmd; 180 struct ncsi_cmd_ebf_pkt *cmd;
181 181
182 cmd = skb_put_zero(skb, sizeof(*cmd)); 182 cmd = skb_put_zero(skb, sizeof(*cmd));
183 cmd->mode = htonl(nca->dwords[0]); 183 cmd->mode = htonl(nca->dwords[0]);
184 ncsi_cmd_build_header(&cmd->cmd.common 184 ncsi_cmd_build_header(&cmd->cmd.common, nca);
185 185
186 return 0; 186 return 0;
187 } 187 }
188 188
189 static int ncsi_cmd_handler_egmf(struct sk_buf 189 static int ncsi_cmd_handler_egmf(struct sk_buff *skb,
190 struct ncsi_c 190 struct ncsi_cmd_arg *nca)
191 { 191 {
192 struct ncsi_cmd_egmf_pkt *cmd; 192 struct ncsi_cmd_egmf_pkt *cmd;
193 193
194 cmd = skb_put_zero(skb, sizeof(*cmd)); 194 cmd = skb_put_zero(skb, sizeof(*cmd));
195 cmd->mode = htonl(nca->dwords[0]); 195 cmd->mode = htonl(nca->dwords[0]);
196 ncsi_cmd_build_header(&cmd->cmd.common 196 ncsi_cmd_build_header(&cmd->cmd.common, nca);
197 197
198 return 0; 198 return 0;
199 } 199 }
200 200
201 static int ncsi_cmd_handler_snfc(struct sk_buf 201 static int ncsi_cmd_handler_snfc(struct sk_buff *skb,
202 struct ncsi_c 202 struct ncsi_cmd_arg *nca)
203 { 203 {
204 struct ncsi_cmd_snfc_pkt *cmd; 204 struct ncsi_cmd_snfc_pkt *cmd;
205 205
206 cmd = skb_put_zero(skb, sizeof(*cmd)); 206 cmd = skb_put_zero(skb, sizeof(*cmd));
207 cmd->mode = nca->bytes[0]; 207 cmd->mode = nca->bytes[0];
208 ncsi_cmd_build_header(&cmd->cmd.common 208 ncsi_cmd_build_header(&cmd->cmd.common, nca);
209 209
210 return 0; 210 return 0;
211 } 211 }
212 212
213 static int ncsi_cmd_handler_oem(struct sk_buff 213 static int ncsi_cmd_handler_oem(struct sk_buff *skb,
214 struct ncsi_cm 214 struct ncsi_cmd_arg *nca)
215 { 215 {
216 struct ncsi_cmd_oem_pkt *cmd; 216 struct ncsi_cmd_oem_pkt *cmd;
217 unsigned int len; 217 unsigned int len;
218 int payload; 218 int payload;
219 /* NC-SI spec DSP_0222_1.2.0, section 219 /* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
220 * requires payload to be padded with 220 * requires payload to be padded with 0 to
221 * 32-bit boundary before the checksum 221 * 32-bit boundary before the checksum field.
222 * Ensure the padding bytes are accoun 222 * Ensure the padding bytes are accounted for in
223 * skb allocation 223 * skb allocation
224 */ 224 */
225 225
226 payload = ALIGN(nca->payload, 4); 226 payload = ALIGN(nca->payload, 4);
227 len = sizeof(struct ncsi_cmd_pkt_hdr) 227 len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
228 len += max(payload, padding_bytes); 228 len += max(payload, padding_bytes);
229 229
230 cmd = skb_put_zero(skb, len); 230 cmd = skb_put_zero(skb, len);
231 unsafe_memcpy(&cmd->mfr_id, nca->data, 231 unsafe_memcpy(&cmd->mfr_id, nca->data, nca->payload,
232 /* skb allocated with en 232 /* skb allocated with enough to load the payload */);
233 ncsi_cmd_build_header(&cmd->cmd.common 233 ncsi_cmd_build_header(&cmd->cmd.common, nca);
234 234
235 return 0; 235 return 0;
236 } 236 }
237 237
238 static struct ncsi_cmd_handler { 238 static struct ncsi_cmd_handler {
239 unsigned char type; 239 unsigned char type;
240 int payload; 240 int payload;
241 int (*handler)(struct sk_buf 241 int (*handler)(struct sk_buff *skb,
242 struct ncsi_c 242 struct ncsi_cmd_arg *nca);
243 } ncsi_cmd_handlers[] = { 243 } ncsi_cmd_handlers[] = {
244 { NCSI_PKT_CMD_CIS, 0, ncsi_cmd_han 244 { NCSI_PKT_CMD_CIS, 0, ncsi_cmd_handler_default },
245 { NCSI_PKT_CMD_SP, 4, ncsi_cmd_han 245 { NCSI_PKT_CMD_SP, 4, ncsi_cmd_handler_sp },
246 { NCSI_PKT_CMD_DP, 0, ncsi_cmd_han 246 { NCSI_PKT_CMD_DP, 0, ncsi_cmd_handler_default },
247 { NCSI_PKT_CMD_EC, 0, ncsi_cmd_han 247 { NCSI_PKT_CMD_EC, 0, ncsi_cmd_handler_default },
248 { NCSI_PKT_CMD_DC, 4, ncsi_cmd_han 248 { NCSI_PKT_CMD_DC, 4, ncsi_cmd_handler_dc },
249 { NCSI_PKT_CMD_RC, 4, ncsi_cmd_han 249 { NCSI_PKT_CMD_RC, 4, ncsi_cmd_handler_rc },
250 { NCSI_PKT_CMD_ECNT, 0, ncsi_cmd_han 250 { NCSI_PKT_CMD_ECNT, 0, ncsi_cmd_handler_default },
251 { NCSI_PKT_CMD_DCNT, 0, ncsi_cmd_han 251 { NCSI_PKT_CMD_DCNT, 0, ncsi_cmd_handler_default },
252 { NCSI_PKT_CMD_AE, 8, ncsi_cmd_han 252 { NCSI_PKT_CMD_AE, 8, ncsi_cmd_handler_ae },
253 { NCSI_PKT_CMD_SL, 8, ncsi_cmd_han 253 { NCSI_PKT_CMD_SL, 8, ncsi_cmd_handler_sl },
254 { NCSI_PKT_CMD_GLS, 0, ncsi_cmd_han 254 { NCSI_PKT_CMD_GLS, 0, ncsi_cmd_handler_default },
255 { NCSI_PKT_CMD_SVF, 8, ncsi_cmd_han 255 { NCSI_PKT_CMD_SVF, 8, ncsi_cmd_handler_svf },
256 { NCSI_PKT_CMD_EV, 4, ncsi_cmd_han 256 { NCSI_PKT_CMD_EV, 4, ncsi_cmd_handler_ev },
257 { NCSI_PKT_CMD_DV, 0, ncsi_cmd_han 257 { NCSI_PKT_CMD_DV, 0, ncsi_cmd_handler_default },
258 { NCSI_PKT_CMD_SMA, 8, ncsi_cmd_han 258 { NCSI_PKT_CMD_SMA, 8, ncsi_cmd_handler_sma },
259 { NCSI_PKT_CMD_EBF, 4, ncsi_cmd_han 259 { NCSI_PKT_CMD_EBF, 4, ncsi_cmd_handler_ebf },
260 { NCSI_PKT_CMD_DBF, 0, ncsi_cmd_han 260 { NCSI_PKT_CMD_DBF, 0, ncsi_cmd_handler_default },
261 { NCSI_PKT_CMD_EGMF, 4, ncsi_cmd_han 261 { NCSI_PKT_CMD_EGMF, 4, ncsi_cmd_handler_egmf },
262 { NCSI_PKT_CMD_DGMF, 0, ncsi_cmd_han 262 { NCSI_PKT_CMD_DGMF, 0, ncsi_cmd_handler_default },
263 { NCSI_PKT_CMD_SNFC, 4, ncsi_cmd_han 263 { NCSI_PKT_CMD_SNFC, 4, ncsi_cmd_handler_snfc },
264 { NCSI_PKT_CMD_GVI, 0, ncsi_cmd_han 264 { NCSI_PKT_CMD_GVI, 0, ncsi_cmd_handler_default },
265 { NCSI_PKT_CMD_GC, 0, ncsi_cmd_han 265 { NCSI_PKT_CMD_GC, 0, ncsi_cmd_handler_default },
266 { NCSI_PKT_CMD_GP, 0, ncsi_cmd_han 266 { NCSI_PKT_CMD_GP, 0, ncsi_cmd_handler_default },
267 { NCSI_PKT_CMD_GCPS, 0, ncsi_cmd_han 267 { NCSI_PKT_CMD_GCPS, 0, ncsi_cmd_handler_default },
268 { NCSI_PKT_CMD_GNS, 0, ncsi_cmd_han 268 { NCSI_PKT_CMD_GNS, 0, ncsi_cmd_handler_default },
269 { NCSI_PKT_CMD_GNPTS, 0, ncsi_cmd_han 269 { NCSI_PKT_CMD_GNPTS, 0, ncsi_cmd_handler_default },
270 { NCSI_PKT_CMD_GPS, 0, ncsi_cmd_han 270 { NCSI_PKT_CMD_GPS, 0, ncsi_cmd_handler_default },
271 { NCSI_PKT_CMD_OEM, -1, ncsi_cmd_han 271 { NCSI_PKT_CMD_OEM, -1, ncsi_cmd_handler_oem },
272 { NCSI_PKT_CMD_PLDM, 0, NULL 272 { NCSI_PKT_CMD_PLDM, 0, NULL },
273 { NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_han !! 273 { NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default }
274 { NCSI_PKT_CMD_GMCMA, 0, ncsi_cmd_han <<
275 }; 274 };
276 275
277 static struct ncsi_request *ncsi_alloc_command 276 static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
278 { 277 {
279 struct ncsi_dev_priv *ndp = nca->ndp; 278 struct ncsi_dev_priv *ndp = nca->ndp;
280 struct ncsi_dev *nd = &ndp->ndev; 279 struct ncsi_dev *nd = &ndp->ndev;
281 struct net_device *dev = nd->dev; 280 struct net_device *dev = nd->dev;
282 int hlen = LL_RESERVED_SPACE(dev); 281 int hlen = LL_RESERVED_SPACE(dev);
283 int tlen = dev->needed_tailroom; 282 int tlen = dev->needed_tailroom;
284 int payload; 283 int payload;
285 int len = hlen + tlen; 284 int len = hlen + tlen;
286 struct sk_buff *skb; 285 struct sk_buff *skb;
287 struct ncsi_request *nr; 286 struct ncsi_request *nr;
288 287
289 nr = ncsi_alloc_request(ndp, nca->req_ 288 nr = ncsi_alloc_request(ndp, nca->req_flags);
290 if (!nr) 289 if (!nr)
291 return NULL; 290 return NULL;
292 291
293 /* NCSI command packet has 16-bytes he 292 /* NCSI command packet has 16-bytes header, payload, 4 bytes checksum.
294 * Payload needs padding so that the c 293 * Payload needs padding so that the checksum field following payload is
295 * aligned to 32-bit boundary. 294 * aligned to 32-bit boundary.
296 * The packet needs padding if its pay 295 * The packet needs padding if its payload is less than 26 bytes to
297 * meet 64 bytes minimal ethernet fram 296 * meet 64 bytes minimal ethernet frame length.
298 */ 297 */
299 len += sizeof(struct ncsi_cmd_pkt_hdr) 298 len += sizeof(struct ncsi_cmd_pkt_hdr) + 4;
300 payload = ALIGN(nca->payload, 4); 299 payload = ALIGN(nca->payload, 4);
301 len += max(payload, padding_bytes); 300 len += max(payload, padding_bytes);
302 301
303 /* Allocate skb */ 302 /* Allocate skb */
304 skb = alloc_skb(len, GFP_ATOMIC); 303 skb = alloc_skb(len, GFP_ATOMIC);
305 if (!skb) { 304 if (!skb) {
306 ncsi_free_request(nr); 305 ncsi_free_request(nr);
307 return NULL; 306 return NULL;
308 } 307 }
309 308
310 nr->cmd = skb; 309 nr->cmd = skb;
311 skb_reserve(skb, hlen); 310 skb_reserve(skb, hlen);
312 skb_reset_network_header(skb); 311 skb_reset_network_header(skb);
313 312
314 skb->dev = dev; 313 skb->dev = dev;
315 skb->protocol = htons(ETH_P_NCSI); 314 skb->protocol = htons(ETH_P_NCSI);
316 315
317 return nr; 316 return nr;
318 } 317 }
319 318
320 int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca) 319 int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
321 { 320 {
322 struct ncsi_cmd_handler *nch = NULL; 321 struct ncsi_cmd_handler *nch = NULL;
323 struct ncsi_request *nr; 322 struct ncsi_request *nr;
324 unsigned char type; 323 unsigned char type;
325 struct ethhdr *eh; 324 struct ethhdr *eh;
326 int i, ret; 325 int i, ret;
327 326
328 /* Use OEM generic handler for Netlink 327 /* Use OEM generic handler for Netlink request */
329 if (nca->req_flags == NCSI_REQ_FLAG_NE 328 if (nca->req_flags == NCSI_REQ_FLAG_NETLINK_DRIVEN)
330 type = NCSI_PKT_CMD_OEM; 329 type = NCSI_PKT_CMD_OEM;
331 else 330 else
332 type = nca->type; 331 type = nca->type;
333 332
334 /* Search for the handler */ 333 /* Search for the handler */
335 for (i = 0; i < ARRAY_SIZE(ncsi_cmd_ha 334 for (i = 0; i < ARRAY_SIZE(ncsi_cmd_handlers); i++) {
336 if (ncsi_cmd_handlers[i].type 335 if (ncsi_cmd_handlers[i].type == type) {
337 if (ncsi_cmd_handlers[ 336 if (ncsi_cmd_handlers[i].handler)
338 nch = &ncsi_cm 337 nch = &ncsi_cmd_handlers[i];
339 else 338 else
340 nch = NULL; 339 nch = NULL;
341 340
342 break; 341 break;
343 } 342 }
344 } 343 }
345 344
346 if (!nch) { 345 if (!nch) {
347 netdev_err(nca->ndp->ndev.dev, 346 netdev_err(nca->ndp->ndev.dev,
348 "Cannot send packet 347 "Cannot send packet with type 0x%02x\n", nca->type);
349 return -ENOENT; 348 return -ENOENT;
350 } 349 }
351 350
352 /* Get packet payload length and alloc 351 /* Get packet payload length and allocate the request
353 * It is expected that if length set a 352 * It is expected that if length set as negative in
354 * handler structure means caller is i 353 * handler structure means caller is initializing it
355 * and setting length in nca before ca 354 * and setting length in nca before calling xmit function
356 */ 355 */
357 if (nch->payload >= 0) 356 if (nch->payload >= 0)
358 nca->payload = nch->payload; 357 nca->payload = nch->payload;
359 nr = ncsi_alloc_command(nca); 358 nr = ncsi_alloc_command(nca);
360 if (!nr) 359 if (!nr)
361 return -ENOMEM; 360 return -ENOMEM;
362 361
363 /* track netlink information */ 362 /* track netlink information */
364 if (nca->req_flags == NCSI_REQ_FLAG_NE 363 if (nca->req_flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
365 nr->snd_seq = nca->info->snd_s 364 nr->snd_seq = nca->info->snd_seq;
366 nr->snd_portid = nca->info->sn 365 nr->snd_portid = nca->info->snd_portid;
367 nr->nlhdr = *nca->info->nlhdr; 366 nr->nlhdr = *nca->info->nlhdr;
368 } 367 }
369 368
370 /* Prepare the packet */ 369 /* Prepare the packet */
371 nca->id = nr->id; 370 nca->id = nr->id;
372 ret = nch->handler(nr->cmd, nca); 371 ret = nch->handler(nr->cmd, nca);
373 if (ret) { 372 if (ret) {
374 ncsi_free_request(nr); 373 ncsi_free_request(nr);
375 return ret; 374 return ret;
376 } 375 }
377 376
378 /* Fill the ethernet header */ 377 /* Fill the ethernet header */
379 eh = skb_push(nr->cmd, sizeof(*eh)); 378 eh = skb_push(nr->cmd, sizeof(*eh));
380 eh->h_proto = htons(ETH_P_NCSI); 379 eh->h_proto = htons(ETH_P_NCSI);
381 eth_broadcast_addr(eh->h_dest); 380 eth_broadcast_addr(eh->h_dest);
382 381
383 /* If mac address received from device 382 /* If mac address received from device then use it for
384 * source address as unicast address e 383 * source address as unicast address else use broadcast
385 * address as source address 384 * address as source address
386 */ 385 */
387 if (nca->ndp->gma_flag == 1) 386 if (nca->ndp->gma_flag == 1)
388 memcpy(eh->h_source, nca->ndp- 387 memcpy(eh->h_source, nca->ndp->ndev.dev->dev_addr, ETH_ALEN);
389 else 388 else
390 eth_broadcast_addr(eh->h_sourc 389 eth_broadcast_addr(eh->h_source);
391 390
392 /* Start the timer for the request tha 391 /* Start the timer for the request that might not have
393 * corresponding response. Given NCSI 392 * corresponding response. Given NCSI is an internal
394 * connection a 1 second delay should 393 * connection a 1 second delay should be sufficient.
395 */ 394 */
396 nr->enabled = true; 395 nr->enabled = true;
397 mod_timer(&nr->timer, jiffies + 1 * HZ 396 mod_timer(&nr->timer, jiffies + 1 * HZ);
398 397
399 /* Send NCSI packet */ 398 /* Send NCSI packet */
400 skb_get(nr->cmd); 399 skb_get(nr->cmd);
401 ret = dev_queue_xmit(nr->cmd); 400 ret = dev_queue_xmit(nr->cmd);
402 if (ret < 0) { 401 if (ret < 0) {
403 ncsi_free_request(nr); 402 ncsi_free_request(nr);
404 return ret; 403 return ret;
405 } 404 }
406 405
407 return 0; 406 return 0;
408 } 407 }
409 408
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