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