1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2005-2014, 2020-2021 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 struct iwl_phy_db_entry {
17 u16 size;
18 u8 *data;
19 };
20
21 /**
22 * struct iwl_phy_db - stores phy configuration and calibration data.
23 *
24 * @cfg: phy configuration.
25 * @calib_nch: non channel specific calibration data.
26 * @n_group_papd: number of entries in papd channel group.
27 * @calib_ch_group_papd: calibration data related to papd channel group.
28 * @n_group_txp: number of entries in tx power channel group.
29 * @calib_ch_group_txp: calibration data related to tx power chanel group.
30 * @trans: transport layer
31 */
32 struct iwl_phy_db {
33 struct iwl_phy_db_entry cfg;
34 struct iwl_phy_db_entry calib_nch;
35 int n_group_papd;
36 struct iwl_phy_db_entry *calib_ch_group_papd;
37 int n_group_txp;
38 struct iwl_phy_db_entry *calib_ch_group_txp;
39
40 struct iwl_trans *trans;
41 };
42
43 enum iwl_phy_db_section_type {
44 IWL_PHY_DB_CFG = 1,
45 IWL_PHY_DB_CALIB_NCH,
46 IWL_PHY_DB_UNUSED,
47 IWL_PHY_DB_CALIB_CHG_PAPD,
48 IWL_PHY_DB_CALIB_CHG_TXP,
49 IWL_PHY_DB_MAX
50 };
51
52 #define PHY_DB_CMD 0x6c
53
54 /* for parsing of tx power channel group data that comes from the firmware*/
55 struct iwl_phy_db_chg_txp {
56 __le32 space;
57 __le16 max_channel_idx;
58 } __packed;
59
iwl_phy_db_init(struct iwl_trans * trans)60 struct iwl_phy_db *iwl_phy_db_init(struct iwl_trans *trans)
61 {
62 struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
63 GFP_KERNEL);
64
65 if (!phy_db)
66 return phy_db;
67
68 phy_db->trans = trans;
69
70 phy_db->n_group_txp = -1;
71 phy_db->n_group_papd = -1;
72
73 /* TODO: add default values of the phy db. */
74 return phy_db;
75 }
76 IWL_EXPORT_SYMBOL(iwl_phy_db_init);
77
78 /*
79 * get phy db section: returns a pointer to a phy db section specified by
80 * type and channel group id.
81 */
82 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)83 iwl_phy_db_get_section(struct iwl_phy_db *phy_db,
84 enum iwl_phy_db_section_type type,
85 u16 chg_id)
86 {
87 if (!phy_db || type >= IWL_PHY_DB_MAX)
88 return NULL;
89
90 switch (type) {
91 case IWL_PHY_DB_CFG:
92 return &phy_db->cfg;
93 case IWL_PHY_DB_CALIB_NCH:
94 return &phy_db->calib_nch;
95 case IWL_PHY_DB_CALIB_CHG_PAPD:
96 if (chg_id >= phy_db->n_group_papd)
97 return NULL;
98 return &phy_db->calib_ch_group_papd[chg_id];
99 case IWL_PHY_DB_CALIB_CHG_TXP:
100 if (chg_id >= phy_db->n_group_txp)
101 return NULL;
102 return &phy_db->calib_ch_group_txp[chg_id];
103 default:
104 return NULL;
105 }
106 return NULL;
107 }
108
iwl_phy_db_free_section(struct iwl_phy_db * phy_db,enum iwl_phy_db_section_type type,u16 chg_id)109 static void iwl_phy_db_free_section(struct iwl_phy_db *phy_db,
110 enum iwl_phy_db_section_type type,
111 u16 chg_id)
112 {
113 struct iwl_phy_db_entry *entry =
114 iwl_phy_db_get_section(phy_db, type, chg_id);
115 if (!entry)
116 return;
117
118 kfree(entry->data);
119 entry->data = NULL;
120 entry->size = 0;
121 }
122
iwl_phy_db_free(struct iwl_phy_db * phy_db)123 void iwl_phy_db_free(struct iwl_phy_db *phy_db)
124 {
125 int i;
126
127 if (!phy_db)
128 return;
129
130 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CFG, 0);
131 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_NCH, 0);
132
133 for (i = 0; i < phy_db->n_group_papd; i++)
134 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i);
135 kfree(phy_db->calib_ch_group_papd);
136
137 for (i = 0; i < phy_db->n_group_txp; i++)
138 iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i);
139 kfree(phy_db->calib_ch_group_txp);
140
141 kfree(phy_db);
142 }
143 IWL_EXPORT_SYMBOL(iwl_phy_db_free);
144
iwl_phy_db_set_section(struct iwl_phy_db * phy_db,struct iwl_rx_packet * pkt)145 int iwl_phy_db_set_section(struct iwl_phy_db *phy_db,
146 struct iwl_rx_packet *pkt)
147 {
148 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
149 struct iwl_calib_res_notif_phy_db *phy_db_notif =
150 (struct iwl_calib_res_notif_phy_db *)pkt->data;
151 enum iwl_phy_db_section_type type;
152 u16 size;
153 struct iwl_phy_db_entry *entry;
154 u16 chg_id = 0;
155
156 if (pkt_len < sizeof(*phy_db_notif))
157 return -EINVAL;
158
159 type = le16_to_cpu(phy_db_notif->type);
160 size = le16_to_cpu(phy_db_notif->length);
161
162 if (pkt_len < sizeof(*phy_db_notif) + size)
163 return -EINVAL;
164
165 if (!phy_db)
166 return -EINVAL;
167
168 if (type == IWL_PHY_DB_CALIB_CHG_PAPD) {
169 chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
170 if (phy_db && !phy_db->calib_ch_group_papd) {
171 /*
172 * Firmware sends the largest index first, so we can use
173 * it to know how much we should allocate.
174 */
175 phy_db->calib_ch_group_papd = kcalloc(chg_id + 1,
176 sizeof(struct iwl_phy_db_entry),
177 GFP_ATOMIC);
178 if (!phy_db->calib_ch_group_papd)
179 return -ENOMEM;
180 phy_db->n_group_papd = chg_id + 1;
181 }
182 } else if (type == IWL_PHY_DB_CALIB_CHG_TXP) {
183 chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
184 if (phy_db && !phy_db->calib_ch_group_txp) {
185 /*
186 * Firmware sends the largest index first, so we can use
187 * it to know how much we should allocate.
188 */
189 phy_db->calib_ch_group_txp = kcalloc(chg_id + 1,
190 sizeof(struct iwl_phy_db_entry),
191 GFP_ATOMIC);
192 if (!phy_db->calib_ch_group_txp)
193 return -ENOMEM;
194 phy_db->n_group_txp = chg_id + 1;
195 }
196 }
197
198 entry = iwl_phy_db_get_section(phy_db, type, chg_id);
199 if (!entry)
200 return -EINVAL;
201
202 kfree(entry->data);
203 entry->data = kmemdup(phy_db_notif->data, size, GFP_ATOMIC);
204 if (!entry->data) {
205 entry->size = 0;
206 return -ENOMEM;
207 }
208
209 entry->size = size;
210
211 IWL_DEBUG_INFO(phy_db->trans,
212 "%s(%d): [PHYDB]SET: Type %d , Size: %d\n",
213 __func__, __LINE__, type, size);
214
215 return 0;
216 }
217 IWL_EXPORT_SYMBOL(iwl_phy_db_set_section);
218
is_valid_channel(u16 ch_id)219 static int is_valid_channel(u16 ch_id)
220 {
221 if (ch_id <= 14 ||
222 (36 <= ch_id && ch_id <= 64 && ch_id % 4 == 0) ||
223 (100 <= ch_id && ch_id <= 140 && ch_id % 4 == 0) ||
224 (145 <= ch_id && ch_id <= 165 && ch_id % 4 == 1))
225 return 1;
226 return 0;
227 }
228
ch_id_to_ch_index(u16 ch_id)229 static u8 ch_id_to_ch_index(u16 ch_id)
230 {
231 if (WARN_ON(!is_valid_channel(ch_id)))
232 return 0xff;
233
234 if (ch_id <= 14)
235 return ch_id - 1;
236 if (ch_id <= 64)
237 return (ch_id + 20) / 4;
238 if (ch_id <= 140)
239 return (ch_id - 12) / 4;
240 return (ch_id - 13) / 4;
241 }
242
243
channel_id_to_papd(u16 ch_id)244 static u16 channel_id_to_papd(u16 ch_id)
245 {
246 if (WARN_ON(!is_valid_channel(ch_id)))
247 return 0xff;
248
249 if (1 <= ch_id && ch_id <= 14)
250 return 0;
251 if (36 <= ch_id && ch_id <= 64)
252 return 1;
253 if (100 <= ch_id && ch_id <= 140)
254 return 2;
255 return 3;
256 }
257
channel_id_to_txp(struct iwl_phy_db * phy_db,u16 ch_id)258 static u16 channel_id_to_txp(struct iwl_phy_db *phy_db, u16 ch_id)
259 {
260 struct iwl_phy_db_chg_txp *txp_chg;
261 int i;
262 u8 ch_index = ch_id_to_ch_index(ch_id);
263 if (ch_index == 0xff)
264 return 0xff;
265
266 for (i = 0; i < phy_db->n_group_txp; i++) {
267 txp_chg = (void *)phy_db->calib_ch_group_txp[i].data;
268 if (!txp_chg)
269 return 0xff;
270 /*
271 * Looking for the first channel group that its max channel is
272 * higher then wanted channel.
273 */
274 if (le16_to_cpu(txp_chg->max_channel_idx) >= ch_index)
275 return i;
276 }
277 return 0xff;
278 }
279 static
iwl_phy_db_get_section_data(struct iwl_phy_db * phy_db,u32 type,u8 ** data,u16 * size,u16 ch_id)280 int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db,
281 u32 type, u8 **data, u16 *size, u16 ch_id)
282 {
283 struct iwl_phy_db_entry *entry;
284 u16 ch_group_id = 0;
285
286 if (!phy_db)
287 return -EINVAL;
288
289 /* find wanted channel group */
290 if (type == IWL_PHY_DB_CALIB_CHG_PAPD)
291 ch_group_id = channel_id_to_papd(ch_id);
292 else if (type == IWL_PHY_DB_CALIB_CHG_TXP)
293 ch_group_id = channel_id_to_txp(phy_db, ch_id);
294
295 entry = iwl_phy_db_get_section(phy_db, type, ch_group_id);
296 if (!entry)
297 return -EINVAL;
298
299 *data = entry->data;
300 *size = entry->size;
301
302 IWL_DEBUG_INFO(phy_db->trans,
303 "%s(%d): [PHYDB] GET: Type %d , Size: %d\n",
304 __func__, __LINE__, type, *size);
305
306 return 0;
307 }
308
iwl_send_phy_db_cmd(struct iwl_phy_db * phy_db,u16 type,u16 length,void * data)309 static int iwl_send_phy_db_cmd(struct iwl_phy_db *phy_db, u16 type,
310 u16 length, void *data)
311 {
312 struct iwl_phy_db_cmd phy_db_cmd;
313 struct iwl_host_cmd cmd = {
314 .id = PHY_DB_CMD,
315 };
316
317 IWL_DEBUG_INFO(phy_db->trans,
318 "Sending PHY-DB hcmd of type %d, of length %d\n",
319 type, length);
320
321 /* Set phy db cmd variables */
322 phy_db_cmd.type = cpu_to_le16(type);
323 phy_db_cmd.length = cpu_to_le16(length);
324
325 /* Set hcmd variables */
326 cmd.data[0] = &phy_db_cmd;
327 cmd.len[0] = sizeof(struct iwl_phy_db_cmd);
328 cmd.data[1] = data;
329 cmd.len[1] = length;
330 cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
331
332 return iwl_trans_send_cmd(phy_db->trans, &cmd);
333 }
334
iwl_phy_db_send_all_channel_groups(struct iwl_phy_db * phy_db,enum iwl_phy_db_section_type type,u8 max_ch_groups)335 static int iwl_phy_db_send_all_channel_groups(
336 struct iwl_phy_db *phy_db,
337 enum iwl_phy_db_section_type type,
338 u8 max_ch_groups)
339 {
340 u16 i;
341 int err;
342 struct iwl_phy_db_entry *entry;
343
344 /* Send all the channel specific groups to operational fw */
345 for (i = 0; i < max_ch_groups; i++) {
346 entry = iwl_phy_db_get_section(phy_db,
347 type,
348 i);
349 if (!entry)
350 return -EINVAL;
351
352 if (!entry->size)
353 continue;
354
355 /* Send the requested PHY DB section */
356 err = iwl_send_phy_db_cmd(phy_db,
357 type,
358 entry->size,
359 entry->data);
360 if (err) {
361 IWL_ERR(phy_db->trans,
362 "Can't SEND phy_db section %d (%d), err %d\n",
363 type, i, err);
364 return err;
365 }
366
367 IWL_DEBUG_INFO(phy_db->trans,
368 "Sent PHY_DB HCMD, type = %d num = %d\n",
369 type, i);
370 }
371
372 return 0;
373 }
374
iwl_send_phy_db_data(struct iwl_phy_db * phy_db)375 int iwl_send_phy_db_data(struct iwl_phy_db *phy_db)
376 {
377 u8 *data = NULL;
378 u16 size = 0;
379 int err;
380
381 IWL_DEBUG_INFO(phy_db->trans,
382 "Sending phy db data and configuration to runtime image\n");
383
384 /* Send PHY DB CFG section */
385 err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CFG,
386 &data, &size, 0);
387 if (err) {
388 IWL_ERR(phy_db->trans, "Cannot get Phy DB cfg section\n");
389 return err;
390 }
391
392 err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CFG, size, data);
393 if (err) {
394 IWL_ERR(phy_db->trans,
395 "Cannot send HCMD of Phy DB cfg section\n");
396 return err;
397 }
398
399 err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CALIB_NCH,
400 &data, &size, 0);
401 if (err) {
402 IWL_ERR(phy_db->trans,
403 "Cannot get Phy DB non specific channel section\n");
404 return err;
405 }
406
407 err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CALIB_NCH, size, data);
408 if (err) {
409 IWL_ERR(phy_db->trans,
410 "Cannot send HCMD of Phy DB non specific channel section\n");
411 return err;
412 }
413
414 /* Send all the TXP channel specific data */
415 err = iwl_phy_db_send_all_channel_groups(phy_db,
416 IWL_PHY_DB_CALIB_CHG_PAPD,
417 phy_db->n_group_papd);
418 if (err) {
419 IWL_ERR(phy_db->trans,
420 "Cannot send channel specific PAPD groups\n");
421 return err;
422 }
423
424 /* Send all the TXP channel specific data */
425 err = iwl_phy_db_send_all_channel_groups(phy_db,
426 IWL_PHY_DB_CALIB_CHG_TXP,
427 phy_db->n_group_txp);
428 if (err) {
429 IWL_ERR(phy_db->trans,
430 "Cannot send channel specific TX power groups\n");
431 return err;
432 }
433
434 IWL_DEBUG_INFO(phy_db->trans,
435 "Finished sending phy db non channel data\n");
436 return 0;
437 }
438 IWL_EXPORT_SYMBOL(iwl_send_phy_db_data);
439