1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2005-2014, 2020 Intel Corporation
4 * Copyright (C) 2016 Intel Deutschland GmbH
5 */
6 #include <linux/slab.h>
7 #include <linux/string.h>
8 #include <linux/export.h>
9
10 #include "iwl-drv.h"
11 #include "iwl-phy-db.h"
12 #include "iwl-debug.h"
13 #include "iwl-op-mode.h"
14 #include "iwl-trans.h"
15
16 #define CHANNEL_NUM_SIZE 4 /* num of channels in calib_ch size */
17
18 struct iwl_phy_db_entry {
19 u16 size;
20 u8 *data;
21 };
22
23 /**
24 * struct iwl_phy_db - stores phy configuration and calibration data.
25 *
26 * @cfg: phy configuration.
27 * @calib_nch: non channel specific calibration data.
28 * @n_group_papd: number of entries in papd channel group.
29 * @calib_ch_group_papd: calibration data related to papd channel group.
30 * @n_group_txp: number of entries in tx power channel group.
31 * @calib_ch_group_txp: calibration data related to tx power chanel group.
32 * @trans: transport layer
33 */
34 struct iwl_phy_db {
35 struct iwl_phy_db_entry cfg;
36 struct iwl_phy_db_entry calib_nch;
37 int n_group_papd;
38 struct iwl_phy_db_entry *calib_ch_group_papd;
39 int n_group_txp;
40 struct iwl_phy_db_entry *calib_ch_group_txp;
41
42 struct iwl_trans *trans;
43 };
44
45 enum iwl_phy_db_section_type {
46 IWL_PHY_DB_CFG = 1,
47 IWL_PHY_DB_CALIB_NCH,
48 IWL_PHY_DB_UNUSED,
49 IWL_PHY_DB_CALIB_CHG_PAPD,
50 IWL_PHY_DB_CALIB_CHG_TXP,
51 IWL_PHY_DB_MAX
52 };
53
54 #define PHY_DB_CMD 0x6c
55
56 /* for parsing of tx power channel group data that comes from the firmware*/
57 struct iwl_phy_db_chg_txp {
58 __le32 space;
59 __le16 max_channel_idx;
60 } __packed;
61
iwl_phy_db_init(struct iwl_trans * trans)62 struct iwl_phy_db *iwl_phy_db_init(struct iwl_trans *trans)
63 {
64 struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
65 GFP_KERNEL);
66
67 if (!phy_db)
68 return phy_db;
69
70 phy_db->trans = trans;
71
72 phy_db->n_group_txp = -1;
73 phy_db->n_group_papd = -1;
74
75 /* TODO: add default values of the phy db. */
76 return phy_db;
77 }
78 IWL_EXPORT_SYMBOL(iwl_phy_db_init);
79
80 /*
81 * get phy db section: returns a pointer to a phy db section specified by
82 * type and channel group id.
83 */
84 static struct iwl_phy_db_entry *
iwl_phy_db_get_section(struct iwl_phy_db * phy_db,enum iwl_phy_db_section_type type,u16 chg_id)85 iwl_phy_db_get_section(struct iwl_phy_db *phy_db,
86 enum iwl_phy_db_section_type type,
87 u16 chg_id)
88 {
89 if (!phy_db || type >= IWL_PHY_DB_MAX)
90 return NULL;
91
92 switch (type) {
93 case IWL_PHY_DB_CFG:
94 return &phy_db->cfg;
95 case IWL_PHY_DB_CALIB_NCH:
96 return &phy_db->calib_nch;
97 case IWL_PHY_DB_CALIB_CHG_PAPD:
98 if (chg_id >= phy_db->n_group_papd)
99 return NULL;
100 return &phy_db->calib_ch_group_papd[chg_id];
101 case IWL_PHY_DB_CALIB_CHG_TXP:
102 if (chg_id >= phy_db->n_group_txp)
103 return NULL;
104 return &phy_db->calib_ch_group_txp[chg_id];
105 default:
106 return NULL;
107 }
108 return NULL;
109 }
110
iwl_phy_db_free_section(struct iwl_phy_db * phy_db,enum iwl_phy_db_section_type type,u16 chg_id)111 static void iwl_phy_db_free_section(struct iwl_phy_db *phy_db,
112 enum iwl_phy_db_section_type type,
113 u16 chg_id)
114 {
115 struct iwl_phy_db_entry *entry =
116 iwl_phy_db_get_section(phy_db, type, chg_id);
117 if (!entry)
118 return;
119
120 kfree(entry->data);
121 entry->data = NULL;
122 entry->size = 0;
123 }
124
iwl_phy_db_free(struct iwl_phy_db * phy_db)125 void iwl_phy_db_free(struct iwl_phy_db *phy_db)
126 {
127 int i;
128
129 if (!phy_db)
130 return;
131
132 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CFG, 0);
133 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_NCH, 0);
134
135 for (i = 0; i < phy_db->n_group_papd; i++)
136 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i);
137 kfree(phy_db->calib_ch_group_papd);
138
139 for (i = 0; i < phy_db->n_group_txp; i++)
140 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i);
141 kfree(phy_db->calib_ch_group_txp);
142
143 kfree(phy_db);
144 }
145 IWL_EXPORT_SYMBOL(iwl_phy_db_free);
146
iwl_phy_db_set_section(struct iwl_phy_db * phy_db,struct iwl_rx_packet * pkt)147 int iwl_phy_db_set_section(struct iwl_phy_db *phy_db,
148 struct iwl_rx_packet *pkt)
149 {
150 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
151 struct iwl_calib_res_notif_phy_db *phy_db_notif =
152 (struct iwl_calib_res_notif_phy_db *)pkt->data;
153 enum iwl_phy_db_section_type type;
154 u16 size;
155 struct iwl_phy_db_entry *entry;
156 u16 chg_id = 0;
157
158 if (pkt_len < sizeof(*phy_db_notif))
159 return -EINVAL;
160
161 type = le16_to_cpu(phy_db_notif->type);
162 size = le16_to_cpu(phy_db_notif->length);
163
164 if (pkt_len < sizeof(*phy_db_notif) + size)
165 return -EINVAL;
166
167 if (!phy_db)
168 return -EINVAL;
169
170 if (type == IWL_PHY_DB_CALIB_CHG_PAPD) {
171 chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
172 if (phy_db && !phy_db->calib_ch_group_papd) {
173 /*
174 * Firmware sends the largest index first, so we can use
175 * it to know how much we should allocate.
176 */
177 phy_db->calib_ch_group_papd = kcalloc(chg_id + 1,
178 sizeof(struct iwl_phy_db_entry),
179 GFP_ATOMIC);
180 if (!phy_db->calib_ch_group_papd)
181 return -ENOMEM;
182 phy_db->n_group_papd = chg_id + 1;
183 }
184 } else if (type == IWL_PHY_DB_CALIB_CHG_TXP) {
185 chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
186 if (phy_db && !phy_db->calib_ch_group_txp) {
187 /*
188 * Firmware sends the largest index first, so we can use
189 * it to know how much we should allocate.
190 */
191 phy_db->calib_ch_group_txp = kcalloc(chg_id + 1,
192 sizeof(struct iwl_phy_db_entry),
193 GFP_ATOMIC);
194 if (!phy_db->calib_ch_group_txp)
195 return -ENOMEM;
196 phy_db->n_group_txp = chg_id + 1;
197 }
198 }
199
200 entry = iwl_phy_db_get_section(phy_db, type, chg_id);
201 if (!entry)
202 return -EINVAL;
203
204 kfree(entry->data);
205 entry->data = kmemdup(phy_db_notif->data, size, GFP_ATOMIC);
206 if (!entry->data) {
207 entry->size = 0;
208 return -ENOMEM;
209 }
210
211 entry->size = size;
212
213 IWL_DEBUG_INFO(phy_db->trans,
214 "%s(%d): [PHYDB]SET: Type %d , Size: %d\n",
215 __func__, __LINE__, type, size);
216
217 return 0;
218 }
219 IWL_EXPORT_SYMBOL(iwl_phy_db_set_section);
220
is_valid_channel(u16 ch_id)221 static int is_valid_channel(u16 ch_id)
222 {
223 if (ch_id <= 14 ||
224 (36 <= ch_id && ch_id <= 64 && ch_id % 4 == 0) ||
225 (100 <= ch_id && ch_id <= 140 && ch_id % 4 == 0) ||
226 (145 <= ch_id && ch_id <= 165 && ch_id % 4 == 1))
227 return 1;
228 return 0;
229 }
230
ch_id_to_ch_index(u16 ch_id)231 static u8 ch_id_to_ch_index(u16 ch_id)
232 {
233 if (WARN_ON(!is_valid_channel(ch_id)))
234 return 0xff;
235
236 if (ch_id <= 14)
237 return ch_id - 1;
238 if (ch_id <= 64)
239 return (ch_id + 20) / 4;
240 if (ch_id <= 140)
241 return (ch_id - 12) / 4;
242 return (ch_id - 13) / 4;
243 }
244
245
channel_id_to_papd(u16 ch_id)246 static u16 channel_id_to_papd(u16 ch_id)
247 {
248 if (WARN_ON(!is_valid_channel(ch_id)))
249 return 0xff;
250
251 if (1 <= ch_id && ch_id <= 14)
252 return 0;
253 if (36 <= ch_id && ch_id <= 64)
254 return 1;
255 if (100 <= ch_id && ch_id <= 140)
256 return 2;
257 return 3;
258 }
259
channel_id_to_txp(struct iwl_phy_db * phy_db,u16 ch_id)260 static u16 channel_id_to_txp(struct iwl_phy_db *phy_db, u16 ch_id)
261 {
262 struct iwl_phy_db_chg_txp *txp_chg;
263 int i;
264 u8 ch_index = ch_id_to_ch_index(ch_id);
265 if (ch_index == 0xff)
266 return 0xff;
267
268 for (i = 0; i < phy_db->n_group_txp; i++) {
269 txp_chg = (void *)phy_db->calib_ch_group_txp[i].data;
270 if (!txp_chg)
271 return 0xff;
272 /*
273 * Looking for the first channel group that its max channel is
274 * higher then wanted channel.
275 */
276 if (le16_to_cpu(txp_chg->max_channel_idx) >= ch_index)
277 return i;
278 }
279 return 0xff;
280 }
281 static
iwl_phy_db_get_section_data(struct iwl_phy_db * phy_db,u32 type,u8 ** data,u16 * size,u16 ch_id)282 int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db,
283 u32 type, u8 **data, u16 *size, u16 ch_id)
284 {
285 struct iwl_phy_db_entry *entry;
286 u16 ch_group_id = 0;
287
288 if (!phy_db)
289 return -EINVAL;
290
291 /* find wanted channel group */
292 if (type == IWL_PHY_DB_CALIB_CHG_PAPD)
293 ch_group_id = channel_id_to_papd(ch_id);
294 else if (type == IWL_PHY_DB_CALIB_CHG_TXP)
295 ch_group_id = channel_id_to_txp(phy_db, ch_id);
296
297 entry = iwl_phy_db_get_section(phy_db, type, ch_group_id);
298 if (!entry)
299 return -EINVAL;
300
301 *data = entry->data;
302 *size = entry->size;
303
304 IWL_DEBUG_INFO(phy_db->trans,
305 "%s(%d): [PHYDB] GET: Type %d , Size: %d\n",
306 __func__, __LINE__, type, *size);
307
308 return 0;
309 }
310
iwl_send_phy_db_cmd(struct iwl_phy_db * phy_db,u16 type,u16 length,void * data)311 static int iwl_send_phy_db_cmd(struct iwl_phy_db *phy_db, u16 type,
312 u16 length, void *data)
313 {
314 struct iwl_phy_db_cmd phy_db_cmd;
315 struct iwl_host_cmd cmd = {
316 .id = PHY_DB_CMD,
317 };
318
319 IWL_DEBUG_INFO(phy_db->trans,
320 "Sending PHY-DB hcmd of type %d, of length %d\n",
321 type, length);
322
323 /* Set phy db cmd variables */
324 phy_db_cmd.type = cpu_to_le16(type);
325 phy_db_cmd.length = cpu_to_le16(length);
326
327 /* Set hcmd variables */
328 cmd.data[0] = &phy_db_cmd;
329 cmd.len[0] = sizeof(struct iwl_phy_db_cmd);
330 cmd.data[1] = data;
331 cmd.len[1] = length;
332 cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
333
334 return iwl_trans_send_cmd(phy_db->trans, &cmd);
335 }
336
iwl_phy_db_send_all_channel_groups(struct iwl_phy_db * phy_db,enum iwl_phy_db_section_type type,u8 max_ch_groups)337 static int iwl_phy_db_send_all_channel_groups(
338 struct iwl_phy_db *phy_db,
339 enum iwl_phy_db_section_type type,
340 u8 max_ch_groups)
341 {
342 u16 i;
343 int err;
344 struct iwl_phy_db_entry *entry;
345
346 /* Send all the channel specific groups to operational fw */
347 for (i = 0; i < max_ch_groups; i++) {
348 entry = iwl_phy_db_get_section(phy_db,
349 type,
350 i);
351 if (!entry)
352 return -EINVAL;
353
354 if (!entry->size)
355 continue;
356
357 /* Send the requested PHY DB section */
358 err = iwl_send_phy_db_cmd(phy_db,
359 type,
360 entry->size,
361 entry->data);
362 if (err) {
363 IWL_ERR(phy_db->trans,
364 "Can't SEND phy_db section %d (%d), err %d\n",
365 type, i, err);
366 return err;
367 }
368
369 IWL_DEBUG_INFO(phy_db->trans,
370 "Sent PHY_DB HCMD, type = %d num = %d\n",
371 type, i);
372 }
373
374 return 0;
375 }
376
iwl_send_phy_db_data(struct iwl_phy_db * phy_db)377 int iwl_send_phy_db_data(struct iwl_phy_db *phy_db)
378 {
379 u8 *data = NULL;
380 u16 size = 0;
381 int err;
382
383 IWL_DEBUG_INFO(phy_db->trans,
384 "Sending phy db data and configuration to runtime image\n");
385
386 /* Send PHY DB CFG section */
387 err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CFG,
388 &data, &size, 0);
389 if (err) {
390 IWL_ERR(phy_db->trans, "Cannot get Phy DB cfg section\n");
391 return err;
392 }
393
394 err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CFG, size, data);
395 if (err) {
396 IWL_ERR(phy_db->trans,
397 "Cannot send HCMD of Phy DB cfg section\n");
398 return err;
399 }
400
401 err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CALIB_NCH,
402 &data, &size, 0);
403 if (err) {
404 IWL_ERR(phy_db->trans,
405 "Cannot get Phy DB non specific channel section\n");
406 return err;
407 }
408
409 err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CALIB_NCH, size, data);
410 if (err) {
411 IWL_ERR(phy_db->trans,
412 "Cannot send HCMD of Phy DB non specific channel section\n");
413 return err;
414 }
415
416 /* Send all the TXP channel specific data */
417 err = iwl_phy_db_send_all_channel_groups(phy_db,
418 IWL_PHY_DB_CALIB_CHG_PAPD,
419 phy_db->n_group_papd);
420 if (err) {
421 IWL_ERR(phy_db->trans,
422 "Cannot send channel specific PAPD groups\n");
423 return err;
424 }
425
426 /* Send all the TXP channel specific data */
427 err = iwl_phy_db_send_all_channel_groups(phy_db,
428 IWL_PHY_DB_CALIB_CHG_TXP,
429 phy_db->n_group_txp);
430 if (err) {
431 IWL_ERR(phy_db->trans,
432 "Cannot send channel specific TX power groups\n");
433 return err;
434 }
435
436 IWL_DEBUG_INFO(phy_db->trans,
437 "Finished sending phy db non channel data\n");
438 return 0;
439 }
440 IWL_EXPORT_SYMBOL(iwl_send_phy_db_data);
441