1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
4 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
5 *
6 * Portions of this file are derived from the ipw3945 project.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <linuxwifi@intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29 #include <linux/delay.h>
30 #include <linux/device.h>
31 #include <linux/export.h>
32
33 #include "iwl-drv.h"
34 #include "iwl-io.h"
35 #include "iwl-csr.h"
36 #include "iwl-debug.h"
37 #include "iwl-prph.h"
38 #include "iwl-fh.h"
39
iwl_write8(struct iwl_trans * trans,u32 ofs,u8 val)40 void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
41 {
42 trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
43 iwl_trans_write8(trans, ofs, val);
44 }
45 IWL_EXPORT_SYMBOL(iwl_write8);
46
iwl_write32(struct iwl_trans * trans,u32 ofs,u32 val)47 void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
48 {
49 trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
50 iwl_trans_write32(trans, ofs, val);
51 }
52 IWL_EXPORT_SYMBOL(iwl_write32);
53
iwl_write64(struct iwl_trans * trans,u64 ofs,u64 val)54 void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
55 {
56 trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
57 iwl_trans_write32(trans, ofs, lower_32_bits(val));
58 iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
59 }
60 IWL_EXPORT_SYMBOL(iwl_write64);
61
iwl_read32(struct iwl_trans * trans,u32 ofs)62 u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
63 {
64 u32 val = iwl_trans_read32(trans, ofs);
65
66 trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
67 return val;
68 }
69 IWL_EXPORT_SYMBOL(iwl_read32);
70
71 #define IWL_POLL_INTERVAL 10 /* microseconds */
72
iwl_poll_bit(struct iwl_trans * trans,u32 addr,u32 bits,u32 mask,int timeout)73 int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
74 u32 bits, u32 mask, int timeout)
75 {
76 int t = 0;
77
78 do {
79 if ((iwl_read32(trans, addr) & mask) == (bits & mask))
80 return t;
81 udelay(IWL_POLL_INTERVAL);
82 t += IWL_POLL_INTERVAL;
83 } while (t < timeout);
84
85 return -ETIMEDOUT;
86 }
87 IWL_EXPORT_SYMBOL(iwl_poll_bit);
88
iwl_read_direct32(struct iwl_trans * trans,u32 reg)89 u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
90 {
91 u32 value = 0x5a5a5a5a;
92 unsigned long flags;
93 if (iwl_trans_grab_nic_access(trans, &flags)) {
94 value = iwl_read32(trans, reg);
95 iwl_trans_release_nic_access(trans, &flags);
96 }
97
98 return value;
99 }
100 IWL_EXPORT_SYMBOL(iwl_read_direct32);
101
iwl_write_direct32(struct iwl_trans * trans,u32 reg,u32 value)102 void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
103 {
104 unsigned long flags;
105
106 if (iwl_trans_grab_nic_access(trans, &flags)) {
107 iwl_write32(trans, reg, value);
108 iwl_trans_release_nic_access(trans, &flags);
109 }
110 }
111 IWL_EXPORT_SYMBOL(iwl_write_direct32);
112
iwl_write_direct64(struct iwl_trans * trans,u64 reg,u64 value)113 void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
114 {
115 unsigned long flags;
116
117 if (iwl_trans_grab_nic_access(trans, &flags)) {
118 iwl_write64(trans, reg, value);
119 iwl_trans_release_nic_access(trans, &flags);
120 }
121 }
122 IWL_EXPORT_SYMBOL(iwl_write_direct64);
123
iwl_poll_direct_bit(struct iwl_trans * trans,u32 addr,u32 mask,int timeout)124 int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
125 int timeout)
126 {
127 int t = 0;
128
129 do {
130 if ((iwl_read_direct32(trans, addr) & mask) == mask)
131 return t;
132 udelay(IWL_POLL_INTERVAL);
133 t += IWL_POLL_INTERVAL;
134 } while (t < timeout);
135
136 return -ETIMEDOUT;
137 }
138 IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
139
iwl_read_prph_no_grab(struct iwl_trans * trans,u32 ofs)140 u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
141 {
142 u32 val = iwl_trans_read_prph(trans, ofs);
143 trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
144 return val;
145 }
146 IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);
147
iwl_write_prph_no_grab(struct iwl_trans * trans,u32 ofs,u32 val)148 void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
149 {
150 trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
151 iwl_trans_write_prph(trans, ofs, val);
152 }
153 IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);
154
iwl_write_prph64_no_grab(struct iwl_trans * trans,u64 ofs,u64 val)155 void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
156 {
157 trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
158 iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
159 iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
160 }
161 IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);
162
iwl_read_prph(struct iwl_trans * trans,u32 ofs)163 u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
164 {
165 unsigned long flags;
166 u32 val = 0x5a5a5a5a;
167
168 if (iwl_trans_grab_nic_access(trans, &flags)) {
169 val = iwl_read_prph_no_grab(trans, ofs);
170 iwl_trans_release_nic_access(trans, &flags);
171 }
172 return val;
173 }
174 IWL_EXPORT_SYMBOL(iwl_read_prph);
175
iwl_write_prph(struct iwl_trans * trans,u32 ofs,u32 val)176 void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
177 {
178 unsigned long flags;
179
180 if (iwl_trans_grab_nic_access(trans, &flags)) {
181 iwl_write_prph_no_grab(trans, ofs, val);
182 iwl_trans_release_nic_access(trans, &flags);
183 }
184 }
185 IWL_EXPORT_SYMBOL(iwl_write_prph);
186
iwl_poll_prph_bit(struct iwl_trans * trans,u32 addr,u32 bits,u32 mask,int timeout)187 int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
188 u32 bits, u32 mask, int timeout)
189 {
190 int t = 0;
191
192 do {
193 if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
194 return t;
195 udelay(IWL_POLL_INTERVAL);
196 t += IWL_POLL_INTERVAL;
197 } while (t < timeout);
198
199 return -ETIMEDOUT;
200 }
201
iwl_set_bits_prph(struct iwl_trans * trans,u32 ofs,u32 mask)202 void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
203 {
204 unsigned long flags;
205
206 if (iwl_trans_grab_nic_access(trans, &flags)) {
207 iwl_write_prph_no_grab(trans, ofs,
208 iwl_read_prph_no_grab(trans, ofs) |
209 mask);
210 iwl_trans_release_nic_access(trans, &flags);
211 }
212 }
213 IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
214
iwl_set_bits_mask_prph(struct iwl_trans * trans,u32 ofs,u32 bits,u32 mask)215 void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
216 u32 bits, u32 mask)
217 {
218 unsigned long flags;
219
220 if (iwl_trans_grab_nic_access(trans, &flags)) {
221 iwl_write_prph_no_grab(trans, ofs,
222 (iwl_read_prph_no_grab(trans, ofs) &
223 mask) | bits);
224 iwl_trans_release_nic_access(trans, &flags);
225 }
226 }
227 IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
228
iwl_clear_bits_prph(struct iwl_trans * trans,u32 ofs,u32 mask)229 void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
230 {
231 unsigned long flags;
232 u32 val;
233
234 if (iwl_trans_grab_nic_access(trans, &flags)) {
235 val = iwl_read_prph_no_grab(trans, ofs);
236 iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
237 iwl_trans_release_nic_access(trans, &flags);
238 }
239 }
240 IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
241
iwl_force_nmi(struct iwl_trans * trans)242 void iwl_force_nmi(struct iwl_trans *trans)
243 {
244 if (trans->cfg->device_family < IWL_DEVICE_FAMILY_9000)
245 iwl_write_prph(trans, DEVICE_SET_NMI_REG,
246 DEVICE_SET_NMI_VAL_DRV);
247 else
248 iwl_write_prph(trans, UREG_NIC_SET_NMI_DRIVER,
249 UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER_MSK);
250 }
251 IWL_EXPORT_SYMBOL(iwl_force_nmi);
252
get_rfh_string(int cmd)253 static const char *get_rfh_string(int cmd)
254 {
255 #define IWL_CMD(x) case x: return #x
256 #define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }
257
258 int i;
259
260 for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
261 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
262 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
263 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
264 IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
265 }
266
267 switch (cmd) {
268 IWL_CMD(RFH_RXF_DMA_CFG);
269 IWL_CMD(RFH_GEN_CFG);
270 IWL_CMD(RFH_GEN_STATUS);
271 IWL_CMD(FH_TSSR_TX_STATUS_REG);
272 IWL_CMD(FH_TSSR_TX_ERROR_REG);
273 default:
274 return "UNKNOWN";
275 }
276 #undef IWL_CMD_MQ
277 }
278
279 struct reg {
280 u32 addr;
281 bool is64;
282 };
283
iwl_dump_rfh(struct iwl_trans * trans,char ** buf)284 static int iwl_dump_rfh(struct iwl_trans *trans, char **buf)
285 {
286 int i, q;
287 int num_q = trans->num_rx_queues;
288 static const u32 rfh_tbl[] = {
289 RFH_RXF_DMA_CFG,
290 RFH_GEN_CFG,
291 RFH_GEN_STATUS,
292 FH_TSSR_TX_STATUS_REG,
293 FH_TSSR_TX_ERROR_REG,
294 };
295 static const struct reg rfh_mq_tbl[] = {
296 { RFH_Q0_FRBDCB_BA_LSB, true },
297 { RFH_Q0_FRBDCB_WIDX, false },
298 { RFH_Q0_FRBDCB_RIDX, false },
299 { RFH_Q0_URBD_STTS_WPTR_LSB, true },
300 };
301
302 #ifdef CONFIG_IWLWIFI_DEBUGFS
303 if (buf) {
304 int pos = 0;
305 /*
306 * Register (up to 34 for name + 8 blank/q for MQ): 40 chars
307 * Colon + space: 2 characters
308 * 0X%08x: 10 characters
309 * New line: 1 character
310 * Total of 53 characters
311 */
312 size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
313 ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;
314
315 *buf = kmalloc(bufsz, GFP_KERNEL);
316 if (!*buf)
317 return -ENOMEM;
318
319 pos += scnprintf(*buf + pos, bufsz - pos,
320 "RFH register values:\n");
321
322 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
323 pos += scnprintf(*buf + pos, bufsz - pos,
324 "%40s: 0X%08x\n",
325 get_rfh_string(rfh_tbl[i]),
326 iwl_read_prph(trans, rfh_tbl[i]));
327
328 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
329 for (q = 0; q < num_q; q++) {
330 u32 addr = rfh_mq_tbl[i].addr;
331
332 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
333 pos += scnprintf(*buf + pos, bufsz - pos,
334 "%34s(q %2d): 0X%08x\n",
335 get_rfh_string(addr), q,
336 iwl_read_prph(trans, addr));
337 }
338
339 return pos;
340 }
341 #endif
342
343 IWL_ERR(trans, "RFH register values:\n");
344 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
345 IWL_ERR(trans, " %34s: 0X%08x\n",
346 get_rfh_string(rfh_tbl[i]),
347 iwl_read_prph(trans, rfh_tbl[i]));
348
349 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
350 for (q = 0; q < num_q; q++) {
351 u32 addr = rfh_mq_tbl[i].addr;
352
353 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
354 IWL_ERR(trans, " %34s(q %d): 0X%08x\n",
355 get_rfh_string(addr), q,
356 iwl_read_prph(trans, addr));
357 }
358
359 return 0;
360 }
361
get_fh_string(int cmd)362 static const char *get_fh_string(int cmd)
363 {
364 switch (cmd) {
365 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
366 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
367 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
368 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
369 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
370 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
371 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
372 IWL_CMD(FH_TSSR_TX_STATUS_REG);
373 IWL_CMD(FH_TSSR_TX_ERROR_REG);
374 default:
375 return "UNKNOWN";
376 }
377 #undef IWL_CMD
378 }
379
iwl_dump_fh(struct iwl_trans * trans,char ** buf)380 int iwl_dump_fh(struct iwl_trans *trans, char **buf)
381 {
382 int i;
383 static const u32 fh_tbl[] = {
384 FH_RSCSR_CHNL0_STTS_WPTR_REG,
385 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
386 FH_RSCSR_CHNL0_WPTR,
387 FH_MEM_RCSR_CHNL0_CONFIG_REG,
388 FH_MEM_RSSR_SHARED_CTRL_REG,
389 FH_MEM_RSSR_RX_STATUS_REG,
390 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
391 FH_TSSR_TX_STATUS_REG,
392 FH_TSSR_TX_ERROR_REG
393 };
394
395 if (trans->cfg->mq_rx_supported)
396 return iwl_dump_rfh(trans, buf);
397
398 #ifdef CONFIG_IWLWIFI_DEBUGFS
399 if (buf) {
400 int pos = 0;
401 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
402
403 *buf = kmalloc(bufsz, GFP_KERNEL);
404 if (!*buf)
405 return -ENOMEM;
406
407 pos += scnprintf(*buf + pos, bufsz - pos,
408 "FH register values:\n");
409
410 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
411 pos += scnprintf(*buf + pos, bufsz - pos,
412 " %34s: 0X%08x\n",
413 get_fh_string(fh_tbl[i]),
414 iwl_read_direct32(trans, fh_tbl[i]));
415
416 return pos;
417 }
418 #endif
419
420 IWL_ERR(trans, "FH register values:\n");
421 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
422 IWL_ERR(trans, " %34s: 0X%08x\n",
423 get_fh_string(fh_tbl[i]),
424 iwl_read_direct32(trans, fh_tbl[i]));
425
426 return 0;
427 }
428
