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