Commit | Line | Data |
---|---|---|
9f6ce424 YK |
1 | /* |
2 | * f_ncm.c -- USB CDC Network (NCM) link function driver | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * Contact: Yauheni Kaliuta <yauheni.kaliuta@nokia.com> | |
6 | * | |
7 | * The driver borrows from f_ecm.c which is: | |
8 | * | |
9 | * Copyright (C) 2003-2005,2008 David Brownell | |
10 | * Copyright (C) 2008 Nokia Corporation | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
9f6ce424 YK |
16 | */ |
17 | ||
18 | #include <linux/kernel.h> | |
40d133d7 | 19 | #include <linux/module.h> |
9f6ce424 YK |
20 | #include <linux/device.h> |
21 | #include <linux/etherdevice.h> | |
22 | #include <linux/crc32.h> | |
23 | ||
24 | #include <linux/usb/cdc.h> | |
25 | ||
26 | #include "u_ether.h" | |
aa83c6ad | 27 | #include "u_ether_configfs.h" |
40d133d7 | 28 | #include "u_ncm.h" |
9f6ce424 YK |
29 | |
30 | /* | |
31 | * This function is a "CDC Network Control Model" (CDC NCM) Ethernet link. | |
32 | * NCM is intended to be used with high-speed network attachments. | |
33 | * | |
34 | * Note that NCM requires the use of "alternate settings" for its data | |
35 | * interface. This means that the set_alt() method has real work to do, | |
36 | * and also means that a get_alt() method is required. | |
37 | */ | |
38 | ||
39 | /* to trigger crc/non-crc ndp signature */ | |
40 | ||
41 | #define NCM_NDP_HDR_CRC_MASK 0x01000000 | |
42 | #define NCM_NDP_HDR_CRC 0x01000000 | |
43 | #define NCM_NDP_HDR_NOCRC 0x00000000 | |
44 | ||
9f6ce424 YK |
45 | enum ncm_notify_state { |
46 | NCM_NOTIFY_NONE, /* don't notify */ | |
47 | NCM_NOTIFY_CONNECT, /* issue CONNECT next */ | |
48 | NCM_NOTIFY_SPEED, /* issue SPEED_CHANGE next */ | |
49 | }; | |
50 | ||
51 | struct f_ncm { | |
52 | struct gether port; | |
53 | u8 ctrl_id, data_id; | |
54 | ||
55 | char ethaddr[14]; | |
56 | ||
9f6ce424 | 57 | struct usb_ep *notify; |
9f6ce424 YK |
58 | struct usb_request *notify_req; |
59 | u8 notify_state; | |
60 | bool is_open; | |
61 | ||
8d640ad3 | 62 | const struct ndp_parser_opts *parser_opts; |
9f6ce424 | 63 | bool is_crc; |
8d640ad3 | 64 | u32 ndp_sign; |
9f6ce424 YK |
65 | |
66 | /* | |
67 | * for notification, it is accessed from both | |
68 | * callback and ethernet open/close | |
69 | */ | |
70 | spinlock_t lock; | |
6d3865f9 JB |
71 | |
72 | struct net_device *netdev; | |
73 | ||
74 | /* For multi-frame NDP TX */ | |
75 | struct sk_buff *skb_tx_data; | |
76 | struct sk_buff *skb_tx_ndp; | |
77 | u16 ndp_dgram_count; | |
78 | bool timer_force_tx; | |
79 | struct tasklet_struct tx_tasklet; | |
80 | struct hrtimer task_timer; | |
81 | ||
82 | bool timer_stopping; | |
9f6ce424 YK |
83 | }; |
84 | ||
85 | static inline struct f_ncm *func_to_ncm(struct usb_function *f) | |
86 | { | |
87 | return container_of(f, struct f_ncm, port.func); | |
88 | } | |
89 | ||
90 | /* peak (theoretical) bulk transfer rate in bits-per-second */ | |
91 | static inline unsigned ncm_bitrate(struct usb_gadget *g) | |
92 | { | |
93 | if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) | |
94 | return 13 * 512 * 8 * 1000 * 8; | |
95 | else | |
96 | return 19 * 64 * 1 * 1000 * 8; | |
97 | } | |
98 | ||
99 | /*-------------------------------------------------------------------------*/ | |
100 | ||
101 | /* | |
102 | * We cannot group frames so use just the minimal size which ok to put | |
103 | * one max-size ethernet frame. | |
104 | * If the host can group frames, allow it to do that, 16K is selected, | |
105 | * because it's used by default by the current linux host driver | |
106 | */ | |
6d3865f9 | 107 | #define NTB_DEFAULT_IN_SIZE 16384 |
9f6ce424 YK |
108 | #define NTB_OUT_SIZE 16384 |
109 | ||
6d3865f9 JB |
110 | /* Allocation for storing the NDP, 32 should suffice for a |
111 | * 16k packet. This allows a maximum of 32 * 507 Byte packets to | |
112 | * be transmitted in a single 16kB skb, though when sending full size | |
113 | * packets this limit will be plenty. | |
114 | * Smaller packets are not likely to be trying to maximize the | |
115 | * throughput and will be mstly sending smaller infrequent frames. | |
9f6ce424 | 116 | */ |
6d3865f9 | 117 | #define TX_MAX_NUM_DPE 32 |
9f6ce424 | 118 | |
6d3865f9 JB |
119 | /* Delay for the transmit to wait before sending an unfilled NTB frame. */ |
120 | #define TX_TIMEOUT_NSECS 300000 | |
9f6ce424 YK |
121 | |
122 | #define FORMATS_SUPPORTED (USB_CDC_NCM_NTB16_SUPPORTED | \ | |
123 | USB_CDC_NCM_NTB32_SUPPORTED) | |
124 | ||
125 | static struct usb_cdc_ncm_ntb_parameters ntb_parameters = { | |
f72e3b78 | 126 | .wLength = cpu_to_le16(sizeof(ntb_parameters)), |
9f6ce424 YK |
127 | .bmNtbFormatsSupported = cpu_to_le16(FORMATS_SUPPORTED), |
128 | .dwNtbInMaxSize = cpu_to_le32(NTB_DEFAULT_IN_SIZE), | |
129 | .wNdpInDivisor = cpu_to_le16(4), | |
130 | .wNdpInPayloadRemainder = cpu_to_le16(0), | |
131 | .wNdpInAlignment = cpu_to_le16(4), | |
132 | ||
133 | .dwNtbOutMaxSize = cpu_to_le32(NTB_OUT_SIZE), | |
134 | .wNdpOutDivisor = cpu_to_le16(4), | |
135 | .wNdpOutPayloadRemainder = cpu_to_le16(0), | |
136 | .wNdpOutAlignment = cpu_to_le16(4), | |
137 | }; | |
138 | ||
139 | /* | |
140 | * Use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one | |
141 | * packet, to simplify cancellation; and a big transfer interval, to | |
142 | * waste less bandwidth. | |
143 | */ | |
144 | ||
bcb2f99c | 145 | #define NCM_STATUS_INTERVAL_MS 32 |
9f6ce424 YK |
146 | #define NCM_STATUS_BYTECOUNT 16 /* 8 byte header + data */ |
147 | ||
40d133d7 | 148 | static struct usb_interface_assoc_descriptor ncm_iad_desc = { |
9f6ce424 YK |
149 | .bLength = sizeof ncm_iad_desc, |
150 | .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, | |
151 | ||
152 | /* .bFirstInterface = DYNAMIC, */ | |
153 | .bInterfaceCount = 2, /* control + data */ | |
154 | .bFunctionClass = USB_CLASS_COMM, | |
155 | .bFunctionSubClass = USB_CDC_SUBCLASS_NCM, | |
156 | .bFunctionProtocol = USB_CDC_PROTO_NONE, | |
157 | /* .iFunction = DYNAMIC */ | |
158 | }; | |
159 | ||
160 | /* interface descriptor: */ | |
161 | ||
40d133d7 | 162 | static struct usb_interface_descriptor ncm_control_intf = { |
9f6ce424 YK |
163 | .bLength = sizeof ncm_control_intf, |
164 | .bDescriptorType = USB_DT_INTERFACE, | |
165 | ||
166 | /* .bInterfaceNumber = DYNAMIC */ | |
167 | .bNumEndpoints = 1, | |
168 | .bInterfaceClass = USB_CLASS_COMM, | |
169 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
170 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
171 | /* .iInterface = DYNAMIC */ | |
172 | }; | |
173 | ||
40d133d7 | 174 | static struct usb_cdc_header_desc ncm_header_desc = { |
9f6ce424 YK |
175 | .bLength = sizeof ncm_header_desc, |
176 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
177 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, | |
178 | ||
179 | .bcdCDC = cpu_to_le16(0x0110), | |
180 | }; | |
181 | ||
40d133d7 | 182 | static struct usb_cdc_union_desc ncm_union_desc = { |
9f6ce424 YK |
183 | .bLength = sizeof(ncm_union_desc), |
184 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
185 | .bDescriptorSubType = USB_CDC_UNION_TYPE, | |
186 | /* .bMasterInterface0 = DYNAMIC */ | |
187 | /* .bSlaveInterface0 = DYNAMIC */ | |
188 | }; | |
189 | ||
40d133d7 | 190 | static struct usb_cdc_ether_desc ecm_desc = { |
9f6ce424 YK |
191 | .bLength = sizeof ecm_desc, |
192 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
193 | .bDescriptorSubType = USB_CDC_ETHERNET_TYPE, | |
194 | ||
195 | /* this descriptor actually adds value, surprise! */ | |
196 | /* .iMACAddress = DYNAMIC */ | |
197 | .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */ | |
198 | .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN), | |
199 | .wNumberMCFilters = cpu_to_le16(0), | |
200 | .bNumberPowerFilters = 0, | |
201 | }; | |
202 | ||
203 | #define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE) | |
204 | ||
40d133d7 | 205 | static struct usb_cdc_ncm_desc ncm_desc = { |
9f6ce424 YK |
206 | .bLength = sizeof ncm_desc, |
207 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
208 | .bDescriptorSubType = USB_CDC_NCM_TYPE, | |
209 | ||
210 | .bcdNcmVersion = cpu_to_le16(0x0100), | |
211 | /* can process SetEthernetPacketFilter */ | |
212 | .bmNetworkCapabilities = NCAPS, | |
213 | }; | |
214 | ||
215 | /* the default data interface has no endpoints ... */ | |
216 | ||
40d133d7 | 217 | static struct usb_interface_descriptor ncm_data_nop_intf = { |
9f6ce424 YK |
218 | .bLength = sizeof ncm_data_nop_intf, |
219 | .bDescriptorType = USB_DT_INTERFACE, | |
220 | ||
221 | .bInterfaceNumber = 1, | |
222 | .bAlternateSetting = 0, | |
223 | .bNumEndpoints = 0, | |
224 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
225 | .bInterfaceSubClass = 0, | |
226 | .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB, | |
227 | /* .iInterface = DYNAMIC */ | |
228 | }; | |
229 | ||
230 | /* ... but the "real" data interface has two bulk endpoints */ | |
231 | ||
40d133d7 | 232 | static struct usb_interface_descriptor ncm_data_intf = { |
9f6ce424 YK |
233 | .bLength = sizeof ncm_data_intf, |
234 | .bDescriptorType = USB_DT_INTERFACE, | |
235 | ||
236 | .bInterfaceNumber = 1, | |
237 | .bAlternateSetting = 1, | |
238 | .bNumEndpoints = 2, | |
239 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
240 | .bInterfaceSubClass = 0, | |
241 | .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB, | |
242 | /* .iInterface = DYNAMIC */ | |
243 | }; | |
244 | ||
245 | /* full speed support: */ | |
246 | ||
40d133d7 | 247 | static struct usb_endpoint_descriptor fs_ncm_notify_desc = { |
9f6ce424 YK |
248 | .bLength = USB_DT_ENDPOINT_SIZE, |
249 | .bDescriptorType = USB_DT_ENDPOINT, | |
250 | ||
251 | .bEndpointAddress = USB_DIR_IN, | |
252 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
253 | .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT), | |
bcb2f99c | 254 | .bInterval = NCM_STATUS_INTERVAL_MS, |
9f6ce424 YK |
255 | }; |
256 | ||
40d133d7 | 257 | static struct usb_endpoint_descriptor fs_ncm_in_desc = { |
9f6ce424 YK |
258 | .bLength = USB_DT_ENDPOINT_SIZE, |
259 | .bDescriptorType = USB_DT_ENDPOINT, | |
260 | ||
261 | .bEndpointAddress = USB_DIR_IN, | |
262 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
263 | }; | |
264 | ||
40d133d7 | 265 | static struct usb_endpoint_descriptor fs_ncm_out_desc = { |
9f6ce424 YK |
266 | .bLength = USB_DT_ENDPOINT_SIZE, |
267 | .bDescriptorType = USB_DT_ENDPOINT, | |
268 | ||
269 | .bEndpointAddress = USB_DIR_OUT, | |
270 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
271 | }; | |
272 | ||
40d133d7 | 273 | static struct usb_descriptor_header *ncm_fs_function[] = { |
9f6ce424 YK |
274 | (struct usb_descriptor_header *) &ncm_iad_desc, |
275 | /* CDC NCM control descriptors */ | |
276 | (struct usb_descriptor_header *) &ncm_control_intf, | |
277 | (struct usb_descriptor_header *) &ncm_header_desc, | |
278 | (struct usb_descriptor_header *) &ncm_union_desc, | |
279 | (struct usb_descriptor_header *) &ecm_desc, | |
280 | (struct usb_descriptor_header *) &ncm_desc, | |
281 | (struct usb_descriptor_header *) &fs_ncm_notify_desc, | |
282 | /* data interface, altsettings 0 and 1 */ | |
283 | (struct usb_descriptor_header *) &ncm_data_nop_intf, | |
284 | (struct usb_descriptor_header *) &ncm_data_intf, | |
285 | (struct usb_descriptor_header *) &fs_ncm_in_desc, | |
286 | (struct usb_descriptor_header *) &fs_ncm_out_desc, | |
287 | NULL, | |
288 | }; | |
289 | ||
290 | /* high speed support: */ | |
291 | ||
40d133d7 | 292 | static struct usb_endpoint_descriptor hs_ncm_notify_desc = { |
9f6ce424 YK |
293 | .bLength = USB_DT_ENDPOINT_SIZE, |
294 | .bDescriptorType = USB_DT_ENDPOINT, | |
295 | ||
296 | .bEndpointAddress = USB_DIR_IN, | |
297 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
298 | .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT), | |
bcb2f99c | 299 | .bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS), |
9f6ce424 | 300 | }; |
40d133d7 | 301 | static struct usb_endpoint_descriptor hs_ncm_in_desc = { |
9f6ce424 YK |
302 | .bLength = USB_DT_ENDPOINT_SIZE, |
303 | .bDescriptorType = USB_DT_ENDPOINT, | |
304 | ||
305 | .bEndpointAddress = USB_DIR_IN, | |
306 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
307 | .wMaxPacketSize = cpu_to_le16(512), | |
308 | }; | |
309 | ||
40d133d7 | 310 | static struct usb_endpoint_descriptor hs_ncm_out_desc = { |
9f6ce424 YK |
311 | .bLength = USB_DT_ENDPOINT_SIZE, |
312 | .bDescriptorType = USB_DT_ENDPOINT, | |
313 | ||
314 | .bEndpointAddress = USB_DIR_OUT, | |
315 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
316 | .wMaxPacketSize = cpu_to_le16(512), | |
317 | }; | |
318 | ||
40d133d7 | 319 | static struct usb_descriptor_header *ncm_hs_function[] = { |
9f6ce424 YK |
320 | (struct usb_descriptor_header *) &ncm_iad_desc, |
321 | /* CDC NCM control descriptors */ | |
322 | (struct usb_descriptor_header *) &ncm_control_intf, | |
323 | (struct usb_descriptor_header *) &ncm_header_desc, | |
324 | (struct usb_descriptor_header *) &ncm_union_desc, | |
325 | (struct usb_descriptor_header *) &ecm_desc, | |
326 | (struct usb_descriptor_header *) &ncm_desc, | |
327 | (struct usb_descriptor_header *) &hs_ncm_notify_desc, | |
328 | /* data interface, altsettings 0 and 1 */ | |
329 | (struct usb_descriptor_header *) &ncm_data_nop_intf, | |
330 | (struct usb_descriptor_header *) &ncm_data_intf, | |
331 | (struct usb_descriptor_header *) &hs_ncm_in_desc, | |
332 | (struct usb_descriptor_header *) &hs_ncm_out_desc, | |
333 | NULL, | |
334 | }; | |
335 | ||
336 | /* string descriptors: */ | |
337 | ||
338 | #define STRING_CTRL_IDX 0 | |
339 | #define STRING_MAC_IDX 1 | |
340 | #define STRING_DATA_IDX 2 | |
341 | #define STRING_IAD_IDX 3 | |
342 | ||
343 | static struct usb_string ncm_string_defs[] = { | |
344 | [STRING_CTRL_IDX].s = "CDC Network Control Model (NCM)", | |
1616e99d | 345 | [STRING_MAC_IDX].s = "", |
9f6ce424 YK |
346 | [STRING_DATA_IDX].s = "CDC Network Data", |
347 | [STRING_IAD_IDX].s = "CDC NCM", | |
348 | { } /* end of list */ | |
349 | }; | |
350 | ||
351 | static struct usb_gadget_strings ncm_string_table = { | |
352 | .language = 0x0409, /* en-us */ | |
353 | .strings = ncm_string_defs, | |
354 | }; | |
355 | ||
356 | static struct usb_gadget_strings *ncm_strings[] = { | |
357 | &ncm_string_table, | |
358 | NULL, | |
359 | }; | |
360 | ||
361 | /* | |
362 | * Here are options for NCM Datagram Pointer table (NDP) parser. | |
363 | * There are 2 different formats: NDP16 and NDP32 in the spec (ch. 3), | |
364 | * in NDP16 offsets and sizes fields are 1 16bit word wide, | |
365 | * in NDP32 -- 2 16bit words wide. Also signatures are different. | |
366 | * To make the parser code the same, put the differences in the structure, | |
367 | * and switch pointers to the structures when the format is changed. | |
368 | */ | |
369 | ||
370 | struct ndp_parser_opts { | |
371 | u32 nth_sign; | |
372 | u32 ndp_sign; | |
373 | unsigned nth_size; | |
374 | unsigned ndp_size; | |
6d3865f9 | 375 | unsigned dpe_size; |
9f6ce424 YK |
376 | unsigned ndplen_align; |
377 | /* sizes in u16 units */ | |
378 | unsigned dgram_item_len; /* index or length */ | |
379 | unsigned block_length; | |
6d3865f9 | 380 | unsigned ndp_index; |
9f6ce424 YK |
381 | unsigned reserved1; |
382 | unsigned reserved2; | |
6d3865f9 | 383 | unsigned next_ndp_index; |
9f6ce424 YK |
384 | }; |
385 | ||
386 | #define INIT_NDP16_OPTS { \ | |
387 | .nth_sign = USB_CDC_NCM_NTH16_SIGN, \ | |
388 | .ndp_sign = USB_CDC_NCM_NDP16_NOCRC_SIGN, \ | |
389 | .nth_size = sizeof(struct usb_cdc_ncm_nth16), \ | |
390 | .ndp_size = sizeof(struct usb_cdc_ncm_ndp16), \ | |
6d3865f9 | 391 | .dpe_size = sizeof(struct usb_cdc_ncm_dpe16), \ |
9f6ce424 YK |
392 | .ndplen_align = 4, \ |
393 | .dgram_item_len = 1, \ | |
394 | .block_length = 1, \ | |
6d3865f9 | 395 | .ndp_index = 1, \ |
9f6ce424 YK |
396 | .reserved1 = 0, \ |
397 | .reserved2 = 0, \ | |
6d3865f9 | 398 | .next_ndp_index = 1, \ |
9f6ce424 YK |
399 | } |
400 | ||
401 | ||
402 | #define INIT_NDP32_OPTS { \ | |
403 | .nth_sign = USB_CDC_NCM_NTH32_SIGN, \ | |
404 | .ndp_sign = USB_CDC_NCM_NDP32_NOCRC_SIGN, \ | |
405 | .nth_size = sizeof(struct usb_cdc_ncm_nth32), \ | |
406 | .ndp_size = sizeof(struct usb_cdc_ncm_ndp32), \ | |
6d3865f9 | 407 | .dpe_size = sizeof(struct usb_cdc_ncm_dpe32), \ |
9f6ce424 YK |
408 | .ndplen_align = 8, \ |
409 | .dgram_item_len = 2, \ | |
410 | .block_length = 2, \ | |
6d3865f9 | 411 | .ndp_index = 2, \ |
9f6ce424 YK |
412 | .reserved1 = 1, \ |
413 | .reserved2 = 2, \ | |
6d3865f9 | 414 | .next_ndp_index = 2, \ |
9f6ce424 YK |
415 | } |
416 | ||
8d640ad3 SAS |
417 | static const struct ndp_parser_opts ndp16_opts = INIT_NDP16_OPTS; |
418 | static const struct ndp_parser_opts ndp32_opts = INIT_NDP32_OPTS; | |
9f6ce424 YK |
419 | |
420 | static inline void put_ncm(__le16 **p, unsigned size, unsigned val) | |
421 | { | |
422 | switch (size) { | |
423 | case 1: | |
424 | put_unaligned_le16((u16)val, *p); | |
425 | break; | |
426 | case 2: | |
427 | put_unaligned_le32((u32)val, *p); | |
428 | ||
429 | break; | |
430 | default: | |
431 | BUG(); | |
432 | } | |
433 | ||
434 | *p += size; | |
435 | } | |
436 | ||
437 | static inline unsigned get_ncm(__le16 **p, unsigned size) | |
438 | { | |
439 | unsigned tmp; | |
440 | ||
441 | switch (size) { | |
442 | case 1: | |
443 | tmp = get_unaligned_le16(*p); | |
444 | break; | |
445 | case 2: | |
446 | tmp = get_unaligned_le32(*p); | |
447 | break; | |
448 | default: | |
449 | BUG(); | |
450 | } | |
451 | ||
452 | *p += size; | |
453 | return tmp; | |
454 | } | |
455 | ||
456 | /*-------------------------------------------------------------------------*/ | |
457 | ||
458 | static inline void ncm_reset_values(struct f_ncm *ncm) | |
459 | { | |
460 | ncm->parser_opts = &ndp16_opts; | |
461 | ncm->is_crc = false; | |
462 | ncm->port.cdc_filter = DEFAULT_FILTER; | |
463 | ||
464 | /* doesn't make sense for ncm, fixed size used */ | |
465 | ncm->port.header_len = 0; | |
466 | ||
467 | ncm->port.fixed_out_len = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize); | |
468 | ncm->port.fixed_in_len = NTB_DEFAULT_IN_SIZE; | |
469 | } | |
470 | ||
471 | /* | |
472 | * Context: ncm->lock held | |
473 | */ | |
474 | static void ncm_do_notify(struct f_ncm *ncm) | |
475 | { | |
476 | struct usb_request *req = ncm->notify_req; | |
477 | struct usb_cdc_notification *event; | |
478 | struct usb_composite_dev *cdev = ncm->port.func.config->cdev; | |
479 | __le32 *data; | |
480 | int status; | |
481 | ||
482 | /* notification already in flight? */ | |
483 | if (!req) | |
484 | return; | |
485 | ||
486 | event = req->buf; | |
487 | switch (ncm->notify_state) { | |
488 | case NCM_NOTIFY_NONE: | |
489 | return; | |
490 | ||
491 | case NCM_NOTIFY_CONNECT: | |
492 | event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION; | |
493 | if (ncm->is_open) | |
494 | event->wValue = cpu_to_le16(1); | |
495 | else | |
496 | event->wValue = cpu_to_le16(0); | |
497 | event->wLength = 0; | |
498 | req->length = sizeof *event; | |
499 | ||
500 | DBG(cdev, "notify connect %s\n", | |
501 | ncm->is_open ? "true" : "false"); | |
502 | ncm->notify_state = NCM_NOTIFY_NONE; | |
503 | break; | |
504 | ||
505 | case NCM_NOTIFY_SPEED: | |
506 | event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE; | |
507 | event->wValue = cpu_to_le16(0); | |
508 | event->wLength = cpu_to_le16(8); | |
509 | req->length = NCM_STATUS_BYTECOUNT; | |
510 | ||
511 | /* SPEED_CHANGE data is up/down speeds in bits/sec */ | |
512 | data = req->buf + sizeof *event; | |
513 | data[0] = cpu_to_le32(ncm_bitrate(cdev->gadget)); | |
514 | data[1] = data[0]; | |
515 | ||
516 | DBG(cdev, "notify speed %d\n", ncm_bitrate(cdev->gadget)); | |
517 | ncm->notify_state = NCM_NOTIFY_CONNECT; | |
518 | break; | |
519 | } | |
520 | event->bmRequestType = 0xA1; | |
521 | event->wIndex = cpu_to_le16(ncm->ctrl_id); | |
522 | ||
523 | ncm->notify_req = NULL; | |
524 | /* | |
525 | * In double buffering if there is a space in FIFO, | |
526 | * completion callback can be called right after the call, | |
527 | * so unlocking | |
528 | */ | |
529 | spin_unlock(&ncm->lock); | |
530 | status = usb_ep_queue(ncm->notify, req, GFP_ATOMIC); | |
531 | spin_lock(&ncm->lock); | |
532 | if (status < 0) { | |
533 | ncm->notify_req = req; | |
534 | DBG(cdev, "notify --> %d\n", status); | |
535 | } | |
536 | } | |
537 | ||
538 | /* | |
539 | * Context: ncm->lock held | |
540 | */ | |
541 | static void ncm_notify(struct f_ncm *ncm) | |
542 | { | |
543 | /* | |
544 | * NOTE on most versions of Linux, host side cdc-ethernet | |
545 | * won't listen for notifications until its netdevice opens. | |
546 | * The first notification then sits in the FIFO for a long | |
547 | * time, and the second one is queued. | |
548 | * | |
549 | * If ncm_notify() is called before the second (CONNECT) | |
550 | * notification is sent, then it will reset to send the SPEED | |
551 | * notificaion again (and again, and again), but it's not a problem | |
552 | */ | |
553 | ncm->notify_state = NCM_NOTIFY_SPEED; | |
554 | ncm_do_notify(ncm); | |
555 | } | |
556 | ||
557 | static void ncm_notify_complete(struct usb_ep *ep, struct usb_request *req) | |
558 | { | |
559 | struct f_ncm *ncm = req->context; | |
560 | struct usb_composite_dev *cdev = ncm->port.func.config->cdev; | |
561 | struct usb_cdc_notification *event = req->buf; | |
562 | ||
563 | spin_lock(&ncm->lock); | |
564 | switch (req->status) { | |
565 | case 0: | |
566 | VDBG(cdev, "Notification %02x sent\n", | |
567 | event->bNotificationType); | |
568 | break; | |
569 | case -ECONNRESET: | |
570 | case -ESHUTDOWN: | |
571 | ncm->notify_state = NCM_NOTIFY_NONE; | |
572 | break; | |
573 | default: | |
574 | DBG(cdev, "event %02x --> %d\n", | |
575 | event->bNotificationType, req->status); | |
576 | break; | |
577 | } | |
578 | ncm->notify_req = req; | |
579 | ncm_do_notify(ncm); | |
580 | spin_unlock(&ncm->lock); | |
581 | } | |
582 | ||
583 | static void ncm_ep0out_complete(struct usb_ep *ep, struct usb_request *req) | |
584 | { | |
585 | /* now for SET_NTB_INPUT_SIZE only */ | |
586 | unsigned in_size; | |
587 | struct usb_function *f = req->context; | |
588 | struct f_ncm *ncm = func_to_ncm(f); | |
589 | struct usb_composite_dev *cdev = ep->driver_data; | |
590 | ||
591 | req->context = NULL; | |
592 | if (req->status || req->actual != req->length) { | |
593 | DBG(cdev, "Bad control-OUT transfer\n"); | |
594 | goto invalid; | |
595 | } | |
596 | ||
597 | in_size = get_unaligned_le32(req->buf); | |
598 | if (in_size < USB_CDC_NCM_NTB_MIN_IN_SIZE || | |
599 | in_size > le32_to_cpu(ntb_parameters.dwNtbInMaxSize)) { | |
600 | DBG(cdev, "Got wrong INPUT SIZE (%d) from host\n", in_size); | |
601 | goto invalid; | |
602 | } | |
603 | ||
604 | ncm->port.fixed_in_len = in_size; | |
605 | VDBG(cdev, "Set NTB INPUT SIZE %d\n", in_size); | |
606 | return; | |
607 | ||
608 | invalid: | |
609 | usb_ep_set_halt(ep); | |
610 | return; | |
611 | } | |
612 | ||
613 | static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) | |
614 | { | |
615 | struct f_ncm *ncm = func_to_ncm(f); | |
616 | struct usb_composite_dev *cdev = f->config->cdev; | |
617 | struct usb_request *req = cdev->req; | |
618 | int value = -EOPNOTSUPP; | |
619 | u16 w_index = le16_to_cpu(ctrl->wIndex); | |
620 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
621 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
622 | ||
623 | /* | |
624 | * composite driver infrastructure handles everything except | |
625 | * CDC class messages; interface activation uses set_alt(). | |
626 | */ | |
627 | switch ((ctrl->bRequestType << 8) | ctrl->bRequest) { | |
628 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
629 | | USB_CDC_SET_ETHERNET_PACKET_FILTER: | |
630 | /* | |
631 | * see 6.2.30: no data, wIndex = interface, | |
632 | * wValue = packet filter bitmap | |
633 | */ | |
634 | if (w_length != 0 || w_index != ncm->ctrl_id) | |
635 | goto invalid; | |
636 | DBG(cdev, "packet filter %02x\n", w_value); | |
637 | /* | |
638 | * REVISIT locking of cdc_filter. This assumes the UDC | |
639 | * driver won't have a concurrent packet TX irq running on | |
640 | * another CPU; or that if it does, this write is atomic... | |
641 | */ | |
642 | ncm->port.cdc_filter = w_value; | |
643 | value = 0; | |
644 | break; | |
645 | /* | |
646 | * and optionally: | |
647 | * case USB_CDC_SEND_ENCAPSULATED_COMMAND: | |
648 | * case USB_CDC_GET_ENCAPSULATED_RESPONSE: | |
649 | * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS: | |
650 | * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER: | |
651 | * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER: | |
652 | * case USB_CDC_GET_ETHERNET_STATISTIC: | |
653 | */ | |
654 | ||
655 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
656 | | USB_CDC_GET_NTB_PARAMETERS: | |
657 | ||
658 | if (w_length == 0 || w_value != 0 || w_index != ncm->ctrl_id) | |
659 | goto invalid; | |
660 | value = w_length > sizeof ntb_parameters ? | |
661 | sizeof ntb_parameters : w_length; | |
662 | memcpy(req->buf, &ntb_parameters, value); | |
663 | VDBG(cdev, "Host asked NTB parameters\n"); | |
664 | break; | |
665 | ||
666 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
667 | | USB_CDC_GET_NTB_INPUT_SIZE: | |
668 | ||
669 | if (w_length < 4 || w_value != 0 || w_index != ncm->ctrl_id) | |
670 | goto invalid; | |
671 | put_unaligned_le32(ncm->port.fixed_in_len, req->buf); | |
672 | value = 4; | |
673 | VDBG(cdev, "Host asked INPUT SIZE, sending %d\n", | |
674 | ncm->port.fixed_in_len); | |
675 | break; | |
676 | ||
677 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
678 | | USB_CDC_SET_NTB_INPUT_SIZE: | |
679 | { | |
680 | if (w_length != 4 || w_value != 0 || w_index != ncm->ctrl_id) | |
681 | goto invalid; | |
682 | req->complete = ncm_ep0out_complete; | |
683 | req->length = w_length; | |
684 | req->context = f; | |
685 | ||
686 | value = req->length; | |
687 | break; | |
688 | } | |
689 | ||
690 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
691 | | USB_CDC_GET_NTB_FORMAT: | |
692 | { | |
693 | uint16_t format; | |
694 | ||
695 | if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id) | |
696 | goto invalid; | |
697 | format = (ncm->parser_opts == &ndp16_opts) ? 0x0000 : 0x0001; | |
698 | put_unaligned_le16(format, req->buf); | |
699 | value = 2; | |
700 | VDBG(cdev, "Host asked NTB FORMAT, sending %d\n", format); | |
701 | break; | |
702 | } | |
703 | ||
704 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
705 | | USB_CDC_SET_NTB_FORMAT: | |
706 | { | |
707 | if (w_length != 0 || w_index != ncm->ctrl_id) | |
708 | goto invalid; | |
709 | switch (w_value) { | |
710 | case 0x0000: | |
711 | ncm->parser_opts = &ndp16_opts; | |
712 | DBG(cdev, "NCM16 selected\n"); | |
713 | break; | |
714 | case 0x0001: | |
715 | ncm->parser_opts = &ndp32_opts; | |
716 | DBG(cdev, "NCM32 selected\n"); | |
717 | break; | |
718 | default: | |
719 | goto invalid; | |
720 | } | |
721 | value = 0; | |
722 | break; | |
723 | } | |
724 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
725 | | USB_CDC_GET_CRC_MODE: | |
726 | { | |
727 | uint16_t is_crc; | |
728 | ||
729 | if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id) | |
730 | goto invalid; | |
731 | is_crc = ncm->is_crc ? 0x0001 : 0x0000; | |
732 | put_unaligned_le16(is_crc, req->buf); | |
733 | value = 2; | |
734 | VDBG(cdev, "Host asked CRC MODE, sending %d\n", is_crc); | |
735 | break; | |
736 | } | |
737 | ||
738 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
739 | | USB_CDC_SET_CRC_MODE: | |
740 | { | |
741 | int ndp_hdr_crc = 0; | |
742 | ||
743 | if (w_length != 0 || w_index != ncm->ctrl_id) | |
744 | goto invalid; | |
745 | switch (w_value) { | |
746 | case 0x0000: | |
747 | ncm->is_crc = false; | |
748 | ndp_hdr_crc = NCM_NDP_HDR_NOCRC; | |
749 | DBG(cdev, "non-CRC mode selected\n"); | |
750 | break; | |
751 | case 0x0001: | |
752 | ncm->is_crc = true; | |
753 | ndp_hdr_crc = NCM_NDP_HDR_CRC; | |
754 | DBG(cdev, "CRC mode selected\n"); | |
755 | break; | |
756 | default: | |
757 | goto invalid; | |
758 | } | |
8d640ad3 | 759 | ncm->ndp_sign = ncm->parser_opts->ndp_sign | ndp_hdr_crc; |
9f6ce424 YK |
760 | value = 0; |
761 | break; | |
762 | } | |
763 | ||
764 | /* and disabled in ncm descriptor: */ | |
765 | /* case USB_CDC_GET_NET_ADDRESS: */ | |
766 | /* case USB_CDC_SET_NET_ADDRESS: */ | |
767 | /* case USB_CDC_GET_MAX_DATAGRAM_SIZE: */ | |
768 | /* case USB_CDC_SET_MAX_DATAGRAM_SIZE: */ | |
769 | ||
770 | default: | |
771 | invalid: | |
772 | DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", | |
773 | ctrl->bRequestType, ctrl->bRequest, | |
774 | w_value, w_index, w_length); | |
775 | } | |
776 | ||
777 | /* respond with data transfer or status phase? */ | |
778 | if (value >= 0) { | |
779 | DBG(cdev, "ncm req%02x.%02x v%04x i%04x l%d\n", | |
780 | ctrl->bRequestType, ctrl->bRequest, | |
781 | w_value, w_index, w_length); | |
782 | req->zero = 0; | |
783 | req->length = value; | |
784 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | |
785 | if (value < 0) | |
786 | ERROR(cdev, "ncm req %02x.%02x response err %d\n", | |
787 | ctrl->bRequestType, ctrl->bRequest, | |
788 | value); | |
789 | } | |
790 | ||
791 | /* device either stalls (value < 0) or reports success */ | |
792 | return value; | |
793 | } | |
794 | ||
795 | ||
796 | static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
797 | { | |
798 | struct f_ncm *ncm = func_to_ncm(f); | |
799 | struct usb_composite_dev *cdev = f->config->cdev; | |
800 | ||
801 | /* Control interface has only altsetting 0 */ | |
802 | if (intf == ncm->ctrl_id) { | |
803 | if (alt != 0) | |
804 | goto fail; | |
805 | ||
806 | if (ncm->notify->driver_data) { | |
807 | DBG(cdev, "reset ncm control %d\n", intf); | |
808 | usb_ep_disable(ncm->notify); | |
ea2a1df7 TB |
809 | } |
810 | ||
811 | if (!(ncm->notify->desc)) { | |
9f6ce424 | 812 | DBG(cdev, "init ncm ctrl %d\n", intf); |
ea2a1df7 TB |
813 | if (config_ep_by_speed(cdev->gadget, f, ncm->notify)) |
814 | goto fail; | |
9f6ce424 | 815 | } |
72c973dd | 816 | usb_ep_enable(ncm->notify); |
9f6ce424 YK |
817 | ncm->notify->driver_data = ncm; |
818 | ||
819 | /* Data interface has two altsettings, 0 and 1 */ | |
820 | } else if (intf == ncm->data_id) { | |
821 | if (alt > 1) | |
822 | goto fail; | |
823 | ||
824 | if (ncm->port.in_ep->driver_data) { | |
825 | DBG(cdev, "reset ncm\n"); | |
6d3865f9 JB |
826 | ncm->timer_stopping = true; |
827 | ncm->netdev = NULL; | |
9f6ce424 YK |
828 | gether_disconnect(&ncm->port); |
829 | ncm_reset_values(ncm); | |
830 | } | |
831 | ||
832 | /* | |
833 | * CDC Network only sends data in non-default altsettings. | |
834 | * Changing altsettings resets filters, statistics, etc. | |
835 | */ | |
836 | if (alt == 1) { | |
837 | struct net_device *net; | |
838 | ||
ea2a1df7 TB |
839 | if (!ncm->port.in_ep->desc || |
840 | !ncm->port.out_ep->desc) { | |
9f6ce424 | 841 | DBG(cdev, "init ncm\n"); |
ea2a1df7 TB |
842 | if (config_ep_by_speed(cdev->gadget, f, |
843 | ncm->port.in_ep) || | |
844 | config_ep_by_speed(cdev->gadget, f, | |
845 | ncm->port.out_ep)) { | |
846 | ncm->port.in_ep->desc = NULL; | |
847 | ncm->port.out_ep->desc = NULL; | |
848 | goto fail; | |
849 | } | |
9f6ce424 YK |
850 | } |
851 | ||
852 | /* TODO */ | |
853 | /* Enable zlps by default for NCM conformance; | |
854 | * override for musb_hdrc (avoids txdma ovhead) | |
855 | */ | |
856 | ncm->port.is_zlp_ok = !( | |
857 | gadget_is_musbhdrc(cdev->gadget) | |
858 | ); | |
859 | ncm->port.cdc_filter = DEFAULT_FILTER; | |
860 | DBG(cdev, "activate ncm\n"); | |
861 | net = gether_connect(&ncm->port); | |
862 | if (IS_ERR(net)) | |
863 | return PTR_ERR(net); | |
6d3865f9 JB |
864 | ncm->netdev = net; |
865 | ncm->timer_stopping = false; | |
9f6ce424 YK |
866 | } |
867 | ||
868 | spin_lock(&ncm->lock); | |
869 | ncm_notify(ncm); | |
870 | spin_unlock(&ncm->lock); | |
871 | } else | |
872 | goto fail; | |
873 | ||
874 | return 0; | |
875 | fail: | |
876 | return -EINVAL; | |
877 | } | |
878 | ||
879 | /* | |
880 | * Because the data interface supports multiple altsettings, | |
881 | * this NCM function *MUST* implement a get_alt() method. | |
882 | */ | |
883 | static int ncm_get_alt(struct usb_function *f, unsigned intf) | |
884 | { | |
885 | struct f_ncm *ncm = func_to_ncm(f); | |
886 | ||
887 | if (intf == ncm->ctrl_id) | |
888 | return 0; | |
889 | return ncm->port.in_ep->driver_data ? 1 : 0; | |
890 | } | |
891 | ||
6d3865f9 JB |
892 | static struct sk_buff *package_for_tx(struct f_ncm *ncm) |
893 | { | |
894 | __le16 *ntb_iter; | |
895 | struct sk_buff *skb2 = NULL; | |
896 | unsigned ndp_pad; | |
897 | unsigned ndp_index; | |
898 | unsigned new_len; | |
899 | ||
900 | const struct ndp_parser_opts *opts = ncm->parser_opts; | |
901 | const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment); | |
902 | const int dgram_idx_len = 2 * 2 * opts->dgram_item_len; | |
903 | ||
904 | /* Stop the timer */ | |
905 | hrtimer_try_to_cancel(&ncm->task_timer); | |
906 | ||
907 | ndp_pad = ALIGN(ncm->skb_tx_data->len, ndp_align) - | |
908 | ncm->skb_tx_data->len; | |
909 | ndp_index = ncm->skb_tx_data->len + ndp_pad; | |
910 | new_len = ndp_index + dgram_idx_len + ncm->skb_tx_ndp->len; | |
911 | ||
912 | /* Set the final BlockLength and wNdpIndex */ | |
913 | ntb_iter = (void *) ncm->skb_tx_data->data; | |
914 | /* Increment pointer to BlockLength */ | |
915 | ntb_iter += 2 + 1 + 1; | |
916 | put_ncm(&ntb_iter, opts->block_length, new_len); | |
917 | put_ncm(&ntb_iter, opts->ndp_index, ndp_index); | |
918 | ||
919 | /* Set the final NDP wLength */ | |
920 | new_len = opts->ndp_size + | |
921 | (ncm->ndp_dgram_count * dgram_idx_len); | |
922 | ncm->ndp_dgram_count = 0; | |
923 | /* Increment from start to wLength */ | |
924 | ntb_iter = (void *) ncm->skb_tx_ndp->data; | |
925 | ntb_iter += 2; | |
926 | put_unaligned_le16(new_len, ntb_iter); | |
927 | ||
928 | /* Merge the skbs */ | |
929 | swap(skb2, ncm->skb_tx_data); | |
930 | if (ncm->skb_tx_data) { | |
931 | dev_kfree_skb_any(ncm->skb_tx_data); | |
932 | ncm->skb_tx_data = NULL; | |
933 | } | |
934 | ||
935 | /* Insert NDP alignment. */ | |
936 | ntb_iter = (void *) skb_put(skb2, ndp_pad); | |
937 | memset(ntb_iter, 0, ndp_pad); | |
938 | ||
939 | /* Copy NTB across. */ | |
940 | ntb_iter = (void *) skb_put(skb2, ncm->skb_tx_ndp->len); | |
941 | memcpy(ntb_iter, ncm->skb_tx_ndp->data, ncm->skb_tx_ndp->len); | |
942 | dev_kfree_skb_any(ncm->skb_tx_ndp); | |
943 | ncm->skb_tx_ndp = NULL; | |
944 | ||
945 | /* Insert zero'd datagram. */ | |
946 | ntb_iter = (void *) skb_put(skb2, dgram_idx_len); | |
947 | memset(ntb_iter, 0, dgram_idx_len); | |
948 | ||
949 | return skb2; | |
950 | } | |
951 | ||
9f6ce424 YK |
952 | static struct sk_buff *ncm_wrap_ntb(struct gether *port, |
953 | struct sk_buff *skb) | |
954 | { | |
955 | struct f_ncm *ncm = func_to_ncm(&port->func); | |
6d3865f9 | 956 | struct sk_buff *skb2 = NULL; |
9f6ce424 | 957 | int ncb_len = 0; |
6d3865f9 JB |
958 | __le16 *ntb_data; |
959 | __le16 *ntb_ndp; | |
960 | int dgram_pad; | |
961 | ||
9f6ce424 | 962 | unsigned max_size = ncm->port.fixed_in_len; |
8d640ad3 | 963 | const struct ndp_parser_opts *opts = ncm->parser_opts; |
6d3865f9 JB |
964 | const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment); |
965 | const int div = le16_to_cpu(ntb_parameters.wNdpInDivisor); | |
966 | const int rem = le16_to_cpu(ntb_parameters.wNdpInPayloadRemainder); | |
967 | const int dgram_idx_len = 2 * 2 * opts->dgram_item_len; | |
9f6ce424 | 968 | |
6d3865f9 | 969 | if (!skb && !ncm->skb_tx_data) |
9f6ce424 | 970 | return NULL; |
9f6ce424 | 971 | |
6d3865f9 JB |
972 | if (skb) { |
973 | /* Add the CRC if required up front */ | |
974 | if (ncm->is_crc) { | |
975 | uint32_t crc; | |
976 | __le16 *crc_pos; | |
977 | ||
978 | crc = ~crc32_le(~0, | |
979 | skb->data, | |
980 | skb->len); | |
981 | crc_pos = (void *) skb_put(skb, sizeof(uint32_t)); | |
982 | put_unaligned_le32(crc, crc_pos); | |
983 | } | |
9f6ce424 | 984 | |
6d3865f9 JB |
985 | /* If the new skb is too big for the current NCM NTB then |
986 | * set the current stored skb to be sent now and clear it | |
987 | * ready for new data. | |
988 | * NOTE: Assume maximum align for speed of calculation. | |
989 | */ | |
990 | if (ncm->skb_tx_data | |
991 | && (ncm->ndp_dgram_count >= TX_MAX_NUM_DPE | |
992 | || (ncm->skb_tx_data->len + | |
993 | div + rem + skb->len + | |
994 | ncm->skb_tx_ndp->len + ndp_align + (2 * dgram_idx_len)) | |
995 | > max_size)) { | |
996 | skb2 = package_for_tx(ncm); | |
997 | if (!skb2) | |
998 | goto err; | |
999 | } | |
9f6ce424 | 1000 | |
6d3865f9 JB |
1001 | if (!ncm->skb_tx_data) { |
1002 | ncb_len = opts->nth_size; | |
1003 | dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len; | |
1004 | ncb_len += dgram_pad; | |
9f6ce424 | 1005 | |
6d3865f9 JB |
1006 | /* Create a new skb for the NTH and datagrams. */ |
1007 | ncm->skb_tx_data = alloc_skb(max_size, GFP_ATOMIC); | |
1008 | if (!ncm->skb_tx_data) | |
1009 | goto err; | |
9f6ce424 | 1010 | |
6d3865f9 JB |
1011 | ntb_data = (void *) skb_put(ncm->skb_tx_data, ncb_len); |
1012 | memset(ntb_data, 0, ncb_len); | |
1013 | /* dwSignature */ | |
1014 | put_unaligned_le32(opts->nth_sign, ntb_data); | |
1015 | ntb_data += 2; | |
1016 | /* wHeaderLength */ | |
1017 | put_unaligned_le16(opts->nth_size, ntb_data++); | |
1018 | ||
1019 | /* Allocate an skb for storing the NDP, | |
1020 | * TX_MAX_NUM_DPE should easily suffice for a | |
1021 | * 16k packet. | |
1022 | */ | |
1023 | ncm->skb_tx_ndp = alloc_skb((int)(opts->ndp_size | |
1024 | + opts->dpe_size | |
1025 | * TX_MAX_NUM_DPE), | |
1026 | GFP_ATOMIC); | |
1027 | if (!ncm->skb_tx_ndp) | |
1028 | goto err; | |
1029 | ntb_ndp = (void *) skb_put(ncm->skb_tx_ndp, | |
1030 | opts->ndp_size); | |
1031 | memset(ntb_ndp, 0, ncb_len); | |
1032 | /* dwSignature */ | |
1033 | put_unaligned_le32(ncm->ndp_sign, ntb_ndp); | |
1034 | ntb_ndp += 2; | |
9f6ce424 | 1035 | |
6d3865f9 JB |
1036 | /* There is always a zeroed entry */ |
1037 | ncm->ndp_dgram_count = 1; | |
9f6ce424 | 1038 | |
6d3865f9 JB |
1039 | /* Note: we skip opts->next_ndp_index */ |
1040 | } | |
9f6ce424 | 1041 | |
6d3865f9 JB |
1042 | /* Delay the timer. */ |
1043 | hrtimer_start(&ncm->task_timer, | |
1044 | ktime_set(0, TX_TIMEOUT_NSECS), | |
1045 | HRTIMER_MODE_REL); | |
1046 | ||
1047 | /* Add the datagram position entries */ | |
1048 | ntb_ndp = (void *) skb_put(ncm->skb_tx_ndp, dgram_idx_len); | |
1049 | memset(ntb_ndp, 0, dgram_idx_len); | |
1050 | ||
1051 | ncb_len = ncm->skb_tx_data->len; | |
1052 | dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len; | |
1053 | ncb_len += dgram_pad; | |
1054 | ||
1055 | /* (d)wDatagramIndex */ | |
1056 | put_ncm(&ntb_ndp, opts->dgram_item_len, ncb_len); | |
1057 | /* (d)wDatagramLength */ | |
1058 | put_ncm(&ntb_ndp, opts->dgram_item_len, skb->len); | |
1059 | ncm->ndp_dgram_count++; | |
1060 | ||
1061 | /* Add the new data to the skb */ | |
1062 | ntb_data = (void *) skb_put(ncm->skb_tx_data, dgram_pad); | |
1063 | memset(ntb_data, 0, dgram_pad); | |
1064 | ntb_data = (void *) skb_put(ncm->skb_tx_data, skb->len); | |
1065 | memcpy(ntb_data, skb->data, skb->len); | |
1066 | dev_kfree_skb_any(skb); | |
1067 | skb = NULL; | |
9f6ce424 | 1068 | |
6d3865f9 JB |
1069 | } else if (ncm->skb_tx_data && ncm->timer_force_tx) { |
1070 | /* If the tx was requested because of a timeout then send */ | |
1071 | skb2 = package_for_tx(ncm); | |
1072 | if (!skb2) | |
1073 | goto err; | |
9f6ce424 YK |
1074 | } |
1075 | ||
6d3865f9 JB |
1076 | return skb2; |
1077 | ||
1078 | err: | |
1079 | ncm->netdev->stats.tx_dropped++; | |
1080 | ||
1081 | if (skb) | |
1082 | dev_kfree_skb_any(skb); | |
1083 | if (ncm->skb_tx_data) | |
1084 | dev_kfree_skb_any(ncm->skb_tx_data); | |
1085 | if (ncm->skb_tx_ndp) | |
1086 | dev_kfree_skb_any(ncm->skb_tx_ndp); | |
1087 | ||
1088 | return NULL; | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * This transmits the NTB if there are frames waiting. | |
1093 | */ | |
1094 | static void ncm_tx_tasklet(unsigned long data) | |
1095 | { | |
1096 | struct f_ncm *ncm = (void *)data; | |
9f6ce424 | 1097 | |
6d3865f9 JB |
1098 | if (ncm->timer_stopping) |
1099 | return; | |
1100 | ||
1101 | /* Only send if data is available. */ | |
1102 | if (ncm->skb_tx_data) { | |
1103 | ncm->timer_force_tx = true; | |
1104 | ncm->netdev->netdev_ops->ndo_start_xmit(NULL, ncm->netdev); | |
1105 | ncm->timer_force_tx = false; | |
1106 | } | |
1107 | } | |
9f6ce424 | 1108 | |
6d3865f9 JB |
1109 | /* |
1110 | * The transmit should only be run if no skb data has been sent | |
1111 | * for a certain duration. | |
1112 | */ | |
1113 | static enum hrtimer_restart ncm_tx_timeout(struct hrtimer *data) | |
1114 | { | |
1115 | struct f_ncm *ncm = container_of(data, struct f_ncm, task_timer); | |
1116 | tasklet_schedule(&ncm->tx_tasklet); | |
1117 | return HRTIMER_NORESTART; | |
9f6ce424 YK |
1118 | } |
1119 | ||
1120 | static int ncm_unwrap_ntb(struct gether *port, | |
1121 | struct sk_buff *skb, | |
1122 | struct sk_buff_head *list) | |
1123 | { | |
1124 | struct f_ncm *ncm = func_to_ncm(&port->func); | |
1125 | __le16 *tmp = (void *) skb->data; | |
1126 | unsigned index, index2; | |
370af734 | 1127 | int ndp_index; |
9f6ce424 YK |
1128 | unsigned dg_len, dg_len2; |
1129 | unsigned ndp_len; | |
1130 | struct sk_buff *skb2; | |
1131 | int ret = -EINVAL; | |
1132 | unsigned max_size = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize); | |
8d640ad3 | 1133 | const struct ndp_parser_opts *opts = ncm->parser_opts; |
9f6ce424 YK |
1134 | unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0; |
1135 | int dgram_counter; | |
1136 | ||
1137 | /* dwSignature */ | |
1138 | if (get_unaligned_le32(tmp) != opts->nth_sign) { | |
1139 | INFO(port->func.config->cdev, "Wrong NTH SIGN, skblen %d\n", | |
1140 | skb->len); | |
1141 | print_hex_dump(KERN_INFO, "HEAD:", DUMP_PREFIX_ADDRESS, 32, 1, | |
1142 | skb->data, 32, false); | |
1143 | ||
1144 | goto err; | |
1145 | } | |
1146 | tmp += 2; | |
1147 | /* wHeaderLength */ | |
1148 | if (get_unaligned_le16(tmp++) != opts->nth_size) { | |
1149 | INFO(port->func.config->cdev, "Wrong NTB headersize\n"); | |
1150 | goto err; | |
1151 | } | |
1152 | tmp++; /* skip wSequence */ | |
1153 | ||
1154 | /* (d)wBlockLength */ | |
1155 | if (get_ncm(&tmp, opts->block_length) > max_size) { | |
1156 | INFO(port->func.config->cdev, "OUT size exceeded\n"); | |
1157 | goto err; | |
1158 | } | |
1159 | ||
6d3865f9 | 1160 | ndp_index = get_ncm(&tmp, opts->ndp_index); |
9f6ce424 | 1161 | |
370af734 | 1162 | /* Run through all the NDP's in the NTB */ |
9f6ce424 | 1163 | do { |
370af734 JB |
1164 | /* NCM 3.2 */ |
1165 | if (((ndp_index % 4) != 0) && | |
1166 | (ndp_index < opts->nth_size)) { | |
1167 | INFO(port->func.config->cdev, "Bad index: %#X\n", | |
1168 | ndp_index); | |
9f6ce424 YK |
1169 | goto err; |
1170 | } | |
370af734 JB |
1171 | |
1172 | /* walk through NDP */ | |
1173 | tmp = (void *)(skb->data + ndp_index); | |
1174 | if (get_unaligned_le32(tmp) != ncm->ndp_sign) { | |
1175 | INFO(port->func.config->cdev, "Wrong NDP SIGN\n"); | |
1176 | goto err; | |
9f6ce424 | 1177 | } |
370af734 | 1178 | tmp += 2; |
9f6ce424 | 1179 | |
370af734 JB |
1180 | ndp_len = get_unaligned_le16(tmp++); |
1181 | /* | |
1182 | * NCM 3.3.1 | |
1183 | * entry is 2 items | |
1184 | * item size is 16/32 bits, opts->dgram_item_len * 2 bytes | |
1185 | * minimal: struct usb_cdc_ncm_ndpX + normal entry + zero entry | |
1186 | * Each entry is a dgram index and a dgram length. | |
1187 | */ | |
1188 | if ((ndp_len < opts->ndp_size | |
1189 | + 2 * 2 * (opts->dgram_item_len * 2)) | |
1190 | || (ndp_len % opts->ndplen_align != 0)) { | |
1191 | INFO(port->func.config->cdev, "Bad NDP length: %#X\n", | |
1192 | ndp_len); | |
1193 | goto err; | |
1194 | } | |
1195 | tmp += opts->reserved1; | |
1196 | /* Check for another NDP (d)wNextNdpIndex */ | |
6d3865f9 | 1197 | ndp_index = get_ncm(&tmp, opts->next_ndp_index); |
370af734 JB |
1198 | tmp += opts->reserved2; |
1199 | ||
1200 | ndp_len -= opts->ndp_size; | |
9f6ce424 YK |
1201 | index2 = get_ncm(&tmp, opts->dgram_item_len); |
1202 | dg_len2 = get_ncm(&tmp, opts->dgram_item_len); | |
370af734 JB |
1203 | dgram_counter = 0; |
1204 | ||
1205 | do { | |
1206 | index = index2; | |
1207 | dg_len = dg_len2; | |
1208 | if (dg_len < 14 + crc_len) { /* ethernet hdr + crc */ | |
1209 | INFO(port->func.config->cdev, | |
1210 | "Bad dgram length: %#X\n", dg_len); | |
1211 | goto err; | |
1212 | } | |
1213 | if (ncm->is_crc) { | |
1214 | uint32_t crc, crc2; | |
1215 | ||
1216 | crc = get_unaligned_le32(skb->data + | |
1217 | index + dg_len - | |
1218 | crc_len); | |
1219 | crc2 = ~crc32_le(~0, | |
1220 | skb->data + index, | |
1221 | dg_len - crc_len); | |
1222 | if (crc != crc2) { | |
1223 | INFO(port->func.config->cdev, | |
1224 | "Bad CRC\n"); | |
1225 | goto err; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | index2 = get_ncm(&tmp, opts->dgram_item_len); | |
1230 | dg_len2 = get_ncm(&tmp, opts->dgram_item_len); | |
9f6ce424 | 1231 | |
9f6ce424 YK |
1232 | skb2 = skb_clone(skb, GFP_ATOMIC); |
1233 | if (skb2 == NULL) | |
1234 | goto err; | |
9f6ce424 | 1235 | |
370af734 JB |
1236 | if (!skb_pull(skb2, index)) { |
1237 | ret = -EOVERFLOW; | |
1238 | goto err; | |
1239 | } | |
9f6ce424 | 1240 | |
370af734 JB |
1241 | skb_trim(skb2, dg_len - crc_len); |
1242 | skb_queue_tail(list, skb2); | |
9f6ce424 | 1243 | |
370af734 | 1244 | ndp_len -= 2 * (opts->dgram_item_len * 2); |
9f6ce424 | 1245 | |
370af734 | 1246 | dgram_counter++; |
9f6ce424 | 1247 | |
370af734 JB |
1248 | if (index2 == 0 || dg_len2 == 0) |
1249 | break; | |
1250 | } while (ndp_len > 2 * (opts->dgram_item_len * 2)); | |
1251 | } while (ndp_index); | |
1252 | ||
1253 | dev_kfree_skb_any(skb); | |
9f6ce424 YK |
1254 | |
1255 | VDBG(port->func.config->cdev, | |
1256 | "Parsed NTB with %d frames\n", dgram_counter); | |
1257 | return 0; | |
1258 | err: | |
1259 | skb_queue_purge(list); | |
1260 | dev_kfree_skb_any(skb); | |
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | static void ncm_disable(struct usb_function *f) | |
1265 | { | |
1266 | struct f_ncm *ncm = func_to_ncm(f); | |
1267 | struct usb_composite_dev *cdev = f->config->cdev; | |
1268 | ||
1269 | DBG(cdev, "ncm deactivated\n"); | |
1270 | ||
6d3865f9 JB |
1271 | if (ncm->port.in_ep->driver_data) { |
1272 | ncm->timer_stopping = true; | |
1273 | ncm->netdev = NULL; | |
9f6ce424 | 1274 | gether_disconnect(&ncm->port); |
6d3865f9 | 1275 | } |
9f6ce424 YK |
1276 | |
1277 | if (ncm->notify->driver_data) { | |
1278 | usb_ep_disable(ncm->notify); | |
1279 | ncm->notify->driver_data = NULL; | |
72c973dd | 1280 | ncm->notify->desc = NULL; |
9f6ce424 YK |
1281 | } |
1282 | } | |
1283 | ||
1284 | /*-------------------------------------------------------------------------*/ | |
1285 | ||
1286 | /* | |
1287 | * Callbacks let us notify the host about connect/disconnect when the | |
1288 | * net device is opened or closed. | |
1289 | * | |
1290 | * For testing, note that link states on this side include both opened | |
1291 | * and closed variants of: | |
1292 | * | |
1293 | * - disconnected/unconfigured | |
1294 | * - configured but inactive (data alt 0) | |
1295 | * - configured and active (data alt 1) | |
1296 | * | |
1297 | * Each needs to be tested with unplug, rmmod, SET_CONFIGURATION, and | |
1298 | * SET_INTERFACE (altsetting). Remember also that "configured" doesn't | |
1299 | * imply the host is actually polling the notification endpoint, and | |
1300 | * likewise that "active" doesn't imply it's actually using the data | |
1301 | * endpoints for traffic. | |
1302 | */ | |
1303 | ||
1304 | static void ncm_open(struct gether *geth) | |
1305 | { | |
1306 | struct f_ncm *ncm = func_to_ncm(&geth->func); | |
1307 | ||
1308 | DBG(ncm->port.func.config->cdev, "%s\n", __func__); | |
1309 | ||
1310 | spin_lock(&ncm->lock); | |
1311 | ncm->is_open = true; | |
1312 | ncm_notify(ncm); | |
1313 | spin_unlock(&ncm->lock); | |
1314 | } | |
1315 | ||
1316 | static void ncm_close(struct gether *geth) | |
1317 | { | |
1318 | struct f_ncm *ncm = func_to_ncm(&geth->func); | |
1319 | ||
1320 | DBG(ncm->port.func.config->cdev, "%s\n", __func__); | |
1321 | ||
1322 | spin_lock(&ncm->lock); | |
1323 | ncm->is_open = false; | |
1324 | ncm_notify(ncm); | |
1325 | spin_unlock(&ncm->lock); | |
1326 | } | |
1327 | ||
1328 | /*-------------------------------------------------------------------------*/ | |
1329 | ||
1330 | /* ethernet function driver setup/binding */ | |
1331 | ||
40d133d7 | 1332 | static int ncm_bind(struct usb_configuration *c, struct usb_function *f) |
9f6ce424 YK |
1333 | { |
1334 | struct usb_composite_dev *cdev = c->cdev; | |
1335 | struct f_ncm *ncm = func_to_ncm(f); | |
8feffd00 | 1336 | struct usb_string *us; |
9f6ce424 YK |
1337 | int status; |
1338 | struct usb_ep *ep; | |
40d133d7 AP |
1339 | struct f_ncm_opts *ncm_opts; |
1340 | ||
1341 | if (!can_support_ecm(cdev->gadget)) | |
1342 | return -EINVAL; | |
1343 | ||
1344 | ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst); | |
1345 | /* | |
1346 | * in drivers/usb/gadget/configfs.c:configfs_composite_bind() | |
1347 | * configurations are bound in sequence with list_for_each_entry, | |
1348 | * in each configuration its functions are bound in sequence | |
1349 | * with list_for_each_entry, so we assume no race condition | |
1350 | * with regard to ncm_opts->bound access | |
1351 | */ | |
1352 | if (!ncm_opts->bound) { | |
e7306603 | 1353 | mutex_lock(&ncm_opts->lock); |
40d133d7 AP |
1354 | gether_set_gadget(ncm_opts->net, cdev->gadget); |
1355 | status = gether_register_netdev(ncm_opts->net); | |
e7306603 | 1356 | mutex_unlock(&ncm_opts->lock); |
40d133d7 AP |
1357 | if (status) |
1358 | return status; | |
1359 | ncm_opts->bound = true; | |
1360 | } | |
8feffd00 AP |
1361 | us = usb_gstrings_attach(cdev, ncm_strings, |
1362 | ARRAY_SIZE(ncm_string_defs)); | |
1363 | if (IS_ERR(us)) | |
1364 | return PTR_ERR(us); | |
1365 | ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id; | |
1366 | ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id; | |
1367 | ncm_data_intf.iInterface = us[STRING_DATA_IDX].id; | |
1368 | ecm_desc.iMACAddress = us[STRING_MAC_IDX].id; | |
1369 | ncm_iad_desc.iFunction = us[STRING_IAD_IDX].id; | |
40d133d7 | 1370 | |
9f6ce424 YK |
1371 | /* allocate instance-specific interface IDs */ |
1372 | status = usb_interface_id(c, f); | |
1373 | if (status < 0) | |
1374 | goto fail; | |
1375 | ncm->ctrl_id = status; | |
1376 | ncm_iad_desc.bFirstInterface = status; | |
1377 | ||
1378 | ncm_control_intf.bInterfaceNumber = status; | |
1379 | ncm_union_desc.bMasterInterface0 = status; | |
1380 | ||
1381 | status = usb_interface_id(c, f); | |
1382 | if (status < 0) | |
1383 | goto fail; | |
1384 | ncm->data_id = status; | |
1385 | ||
1386 | ncm_data_nop_intf.bInterfaceNumber = status; | |
1387 | ncm_data_intf.bInterfaceNumber = status; | |
1388 | ncm_union_desc.bSlaveInterface0 = status; | |
1389 | ||
1390 | status = -ENODEV; | |
1391 | ||
1392 | /* allocate instance-specific endpoints */ | |
1393 | ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_in_desc); | |
1394 | if (!ep) | |
1395 | goto fail; | |
1396 | ncm->port.in_ep = ep; | |
1397 | ep->driver_data = cdev; /* claim */ | |
1398 | ||
1399 | ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_out_desc); | |
1400 | if (!ep) | |
1401 | goto fail; | |
1402 | ncm->port.out_ep = ep; | |
1403 | ep->driver_data = cdev; /* claim */ | |
1404 | ||
1405 | ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_notify_desc); | |
1406 | if (!ep) | |
1407 | goto fail; | |
1408 | ncm->notify = ep; | |
1409 | ep->driver_data = cdev; /* claim */ | |
1410 | ||
1411 | status = -ENOMEM; | |
1412 | ||
1413 | /* allocate notification request and buffer */ | |
1414 | ncm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL); | |
1415 | if (!ncm->notify_req) | |
1416 | goto fail; | |
1417 | ncm->notify_req->buf = kmalloc(NCM_STATUS_BYTECOUNT, GFP_KERNEL); | |
1418 | if (!ncm->notify_req->buf) | |
1419 | goto fail; | |
1420 | ncm->notify_req->context = ncm; | |
1421 | ncm->notify_req->complete = ncm_notify_complete; | |
1422 | ||
9f6ce424 YK |
1423 | /* |
1424 | * support all relevant hardware speeds... we expect that when | |
1425 | * hardware is dual speed, all bulk-capable endpoints work at | |
1426 | * both speeds | |
1427 | */ | |
10287bae SAS |
1428 | hs_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress; |
1429 | hs_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress; | |
1430 | hs_ncm_notify_desc.bEndpointAddress = | |
1431 | fs_ncm_notify_desc.bEndpointAddress; | |
9f6ce424 | 1432 | |
10287bae SAS |
1433 | status = usb_assign_descriptors(f, ncm_fs_function, ncm_hs_function, |
1434 | NULL); | |
9f6ce424 YK |
1435 | /* |
1436 | * NOTE: all that is done without knowing or caring about | |
1437 | * the network link ... which is unavailable to this code | |
1438 | * until we're activated via set_alt(). | |
1439 | */ | |
1440 | ||
1441 | ncm->port.open = ncm_open; | |
1442 | ncm->port.close = ncm_close; | |
1443 | ||
6d3865f9 JB |
1444 | tasklet_init(&ncm->tx_tasklet, ncm_tx_tasklet, (unsigned long) ncm); |
1445 | hrtimer_init(&ncm->task_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); | |
1446 | ncm->task_timer.function = ncm_tx_timeout; | |
1447 | ||
9f6ce424 YK |
1448 | DBG(cdev, "CDC Network: %s speed IN/%s OUT/%s NOTIFY/%s\n", |
1449 | gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", | |
1450 | ncm->port.in_ep->name, ncm->port.out_ep->name, | |
1451 | ncm->notify->name); | |
1452 | return 0; | |
1453 | ||
1454 | fail: | |
10287bae | 1455 | usb_free_all_descriptors(f); |
9f6ce424 YK |
1456 | if (ncm->notify_req) { |
1457 | kfree(ncm->notify_req->buf); | |
1458 | usb_ep_free_request(ncm->notify, ncm->notify_req); | |
1459 | } | |
1460 | ||
1461 | /* we might as well release our claims on endpoints */ | |
1462 | if (ncm->notify) | |
1463 | ncm->notify->driver_data = NULL; | |
e79cc615 | 1464 | if (ncm->port.out_ep) |
9f6ce424 | 1465 | ncm->port.out_ep->driver_data = NULL; |
e79cc615 | 1466 | if (ncm->port.in_ep) |
9f6ce424 YK |
1467 | ncm->port.in_ep->driver_data = NULL; |
1468 | ||
1469 | ERROR(cdev, "%s: can't bind, err %d\n", f->name, status); | |
1470 | ||
1471 | return status; | |
1472 | } | |
1473 | ||
e7306603 AP |
1474 | static inline struct f_ncm_opts *to_f_ncm_opts(struct config_item *item) |
1475 | { | |
1476 | return container_of(to_config_group(item), struct f_ncm_opts, | |
1477 | func_inst.group); | |
1478 | } | |
1479 | ||
aa83c6ad AP |
1480 | /* f_ncm_item_ops */ |
1481 | USB_ETHERNET_CONFIGFS_ITEM(ncm); | |
e7306603 | 1482 | |
aa83c6ad AP |
1483 | /* f_ncm_opts_dev_addr */ |
1484 | USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ncm); | |
e7306603 | 1485 | |
aa83c6ad AP |
1486 | /* f_ncm_opts_host_addr */ |
1487 | USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ncm); | |
e7306603 | 1488 | |
aa83c6ad AP |
1489 | /* f_ncm_opts_qmult */ |
1490 | USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ncm); | |
e7306603 | 1491 | |
aa83c6ad AP |
1492 | /* f_ncm_opts_ifname */ |
1493 | USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ncm); | |
e7306603 AP |
1494 | |
1495 | static struct configfs_attribute *ncm_attrs[] = { | |
1496 | &f_ncm_opts_dev_addr.attr, | |
1497 | &f_ncm_opts_host_addr.attr, | |
1498 | &f_ncm_opts_qmult.attr, | |
1499 | &f_ncm_opts_ifname.attr, | |
1500 | NULL, | |
1501 | }; | |
1502 | ||
1503 | static struct config_item_type ncm_func_type = { | |
1504 | .ct_item_ops = &ncm_item_ops, | |
1505 | .ct_attrs = ncm_attrs, | |
1506 | .ct_owner = THIS_MODULE, | |
1507 | }; | |
1508 | ||
40d133d7 AP |
1509 | static void ncm_free_inst(struct usb_function_instance *f) |
1510 | { | |
1511 | struct f_ncm_opts *opts; | |
1512 | ||
1513 | opts = container_of(f, struct f_ncm_opts, func_inst); | |
1514 | if (opts->bound) | |
1515 | gether_cleanup(netdev_priv(opts->net)); | |
1516 | else | |
1517 | free_netdev(opts->net); | |
1518 | kfree(opts); | |
1519 | } | |
1520 | ||
1521 | static struct usb_function_instance *ncm_alloc_inst(void) | |
1522 | { | |
1523 | struct f_ncm_opts *opts; | |
1524 | ||
1525 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
1526 | if (!opts) | |
1527 | return ERR_PTR(-ENOMEM); | |
e7306603 | 1528 | mutex_init(&opts->lock); |
40d133d7 AP |
1529 | opts->func_inst.free_func_inst = ncm_free_inst; |
1530 | opts->net = gether_setup_default(); | |
172d934c AP |
1531 | if (IS_ERR(opts->net)) { |
1532 | struct net_device *net = opts->net; | |
1533 | kfree(opts); | |
1534 | return ERR_CAST(net); | |
1535 | } | |
40d133d7 | 1536 | |
e7306603 AP |
1537 | config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type); |
1538 | ||
40d133d7 AP |
1539 | return &opts->func_inst; |
1540 | } | |
1541 | ||
1542 | static void ncm_free(struct usb_function *f) | |
1543 | { | |
1544 | struct f_ncm *ncm; | |
e7306603 | 1545 | struct f_ncm_opts *opts; |
40d133d7 AP |
1546 | |
1547 | ncm = func_to_ncm(f); | |
e7306603 | 1548 | opts = container_of(f->fi, struct f_ncm_opts, func_inst); |
40d133d7 | 1549 | kfree(ncm); |
e7306603 AP |
1550 | mutex_lock(&opts->lock); |
1551 | opts->refcnt--; | |
1552 | mutex_unlock(&opts->lock); | |
40d133d7 AP |
1553 | } |
1554 | ||
1555 | static void ncm_unbind(struct usb_configuration *c, struct usb_function *f) | |
1556 | { | |
1557 | struct f_ncm *ncm = func_to_ncm(f); | |
1558 | ||
1559 | DBG(c->cdev, "ncm unbind\n"); | |
1560 | ||
6d3865f9 JB |
1561 | hrtimer_cancel(&ncm->task_timer); |
1562 | tasklet_kill(&ncm->tx_tasklet); | |
1563 | ||
1564 | ncm_string_defs[0].id = 0; | |
40d133d7 AP |
1565 | usb_free_all_descriptors(f); |
1566 | ||
1567 | kfree(ncm->notify_req->buf); | |
1568 | usb_ep_free_request(ncm->notify, ncm->notify_req); | |
1569 | } | |
1570 | ||
36a61125 | 1571 | static struct usb_function *ncm_alloc(struct usb_function_instance *fi) |
40d133d7 AP |
1572 | { |
1573 | struct f_ncm *ncm; | |
1574 | struct f_ncm_opts *opts; | |
1575 | int status; | |
1576 | ||
1577 | /* allocate and initialize one new instance */ | |
1578 | ncm = kzalloc(sizeof(*ncm), GFP_KERNEL); | |
1579 | if (!ncm) | |
1580 | return ERR_PTR(-ENOMEM); | |
1581 | ||
1582 | opts = container_of(fi, struct f_ncm_opts, func_inst); | |
e7306603 AP |
1583 | mutex_lock(&opts->lock); |
1584 | opts->refcnt++; | |
40d133d7 AP |
1585 | |
1586 | /* export host's Ethernet address in CDC format */ | |
1587 | status = gether_get_host_addr_cdc(opts->net, ncm->ethaddr, | |
1588 | sizeof(ncm->ethaddr)); | |
1589 | if (status < 12) { /* strlen("01234567890a") */ | |
1590 | kfree(ncm); | |
c92834c1 | 1591 | mutex_unlock(&opts->lock); |
40d133d7 AP |
1592 | return ERR_PTR(-EINVAL); |
1593 | } | |
1594 | ncm_string_defs[STRING_MAC_IDX].s = ncm->ethaddr; | |
1595 | ||
1596 | spin_lock_init(&ncm->lock); | |
1597 | ncm_reset_values(ncm); | |
1598 | ncm->port.ioport = netdev_priv(opts->net); | |
e7306603 | 1599 | mutex_unlock(&opts->lock); |
40d133d7 | 1600 | ncm->port.is_fixed = true; |
6d3865f9 | 1601 | ncm->port.supports_multi_frame = true; |
40d133d7 AP |
1602 | |
1603 | ncm->port.func.name = "cdc_network"; | |
40d133d7 AP |
1604 | /* descriptors are per-instance copies */ |
1605 | ncm->port.func.bind = ncm_bind; | |
1606 | ncm->port.func.unbind = ncm_unbind; | |
1607 | ncm->port.func.set_alt = ncm_set_alt; | |
1608 | ncm->port.func.get_alt = ncm_get_alt; | |
1609 | ncm->port.func.setup = ncm_setup; | |
1610 | ncm->port.func.disable = ncm_disable; | |
1611 | ncm->port.func.free_func = ncm_free; | |
1612 | ||
1613 | ncm->port.wrap = ncm_wrap_ntb; | |
1614 | ncm->port.unwrap = ncm_unwrap_ntb; | |
1615 | ||
1616 | return &ncm->port.func; | |
1617 | } | |
1618 | ||
1619 | DECLARE_USB_FUNCTION_INIT(ncm, ncm_alloc_inst, ncm_alloc); | |
1620 | MODULE_LICENSE("GPL"); | |
1621 | MODULE_AUTHOR("Yauheni Kaliuta"); |