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6#include <linux/delay.h>
7#include <linux/device.h>
8#include <linux/export.h>
9
10#include "iwl-drv.h"
11#include "iwl-io.h"
12#include "iwl-csr.h"
13#include "iwl-debug.h"
14#include "iwl-prph.h"
15#include "iwl-fh.h"
16
17void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
18{
19 trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
20 iwl_trans_write8(trans, ofs, val);
21}
22IWL_EXPORT_SYMBOL(iwl_write8);
23
24void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
25{
26 trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
27 iwl_trans_write32(trans, ofs, val);
28}
29IWL_EXPORT_SYMBOL(iwl_write32);
30
31void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
32{
33 trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
34 iwl_trans_write32(trans, ofs, lower_32_bits(val));
35 iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
36}
37IWL_EXPORT_SYMBOL(iwl_write64);
38
39u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
40{
41 u32 val = iwl_trans_read32(trans, ofs);
42
43 trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
44 return val;
45}
46IWL_EXPORT_SYMBOL(iwl_read32);
47
48#define IWL_POLL_INTERVAL 10
49
50int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
51 u32 bits, u32 mask, int timeout)
52{
53 int t = 0;
54
55 do {
56 if ((iwl_read32(trans, addr) & mask) == (bits & mask))
57 return t;
58 udelay(IWL_POLL_INTERVAL);
59 t += IWL_POLL_INTERVAL;
60 } while (t < timeout);
61
62 return -ETIMEDOUT;
63}
64IWL_EXPORT_SYMBOL(iwl_poll_bit);
65
66u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
67{
68 u32 value = 0x5a5a5a5a;
69
70 if (iwl_trans_grab_nic_access(trans)) {
71 value = iwl_read32(trans, reg);
72 iwl_trans_release_nic_access(trans);
73 }
74
75 return value;
76}
77IWL_EXPORT_SYMBOL(iwl_read_direct32);
78
79void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
80{
81 if (iwl_trans_grab_nic_access(trans)) {
82 iwl_write32(trans, reg, value);
83 iwl_trans_release_nic_access(trans);
84 }
85}
86IWL_EXPORT_SYMBOL(iwl_write_direct32);
87
88void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
89{
90 if (iwl_trans_grab_nic_access(trans)) {
91 iwl_write64(trans, reg, value);
92 iwl_trans_release_nic_access(trans);
93 }
94}
95IWL_EXPORT_SYMBOL(iwl_write_direct64);
96
97int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
98 int timeout)
99{
100 int t = 0;
101
102 do {
103 if ((iwl_read_direct32(trans, addr) & mask) == mask)
104 return t;
105 udelay(IWL_POLL_INTERVAL);
106 t += IWL_POLL_INTERVAL;
107 } while (t < timeout);
108
109 return -ETIMEDOUT;
110}
111IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
112
113u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
114{
115 u32 val = iwl_trans_read_prph(trans, ofs);
116 trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
117 return val;
118}
119IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);
120
121void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
122{
123 trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
124 iwl_trans_write_prph(trans, ofs, val);
125}
126IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);
127
128void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
129{
130 trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
131 iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
132 iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
133}
134IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);
135
136u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
137{
138 u32 val = 0x5a5a5a5a;
139
140 if (iwl_trans_grab_nic_access(trans)) {
141 val = iwl_read_prph_no_grab(trans, ofs);
142 iwl_trans_release_nic_access(trans);
143 }
144 return val;
145}
146IWL_EXPORT_SYMBOL(iwl_read_prph);
147
148void iwl_write_prph_delay(struct iwl_trans *trans, u32 ofs, u32 val, u32 delay_ms)
149{
150 if (iwl_trans_grab_nic_access(trans)) {
151 mdelay(delay_ms);
152 iwl_write_prph_no_grab(trans, ofs, val);
153 iwl_trans_release_nic_access(trans);
154 }
155}
156IWL_EXPORT_SYMBOL(iwl_write_prph_delay);
157
158int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
159 u32 bits, u32 mask, int timeout)
160{
161 int t = 0;
162
163 do {
164 if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
165 return t;
166 udelay(IWL_POLL_INTERVAL);
167 t += IWL_POLL_INTERVAL;
168 } while (t < timeout);
169
170 return -ETIMEDOUT;
171}
172
173void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
174{
175 if (iwl_trans_grab_nic_access(trans)) {
176 iwl_write_prph_no_grab(trans, ofs,
177 iwl_read_prph_no_grab(trans, ofs) |
178 mask);
179 iwl_trans_release_nic_access(trans);
180 }
181}
182IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
183
184void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
185 u32 bits, u32 mask)
186{
187 if (iwl_trans_grab_nic_access(trans)) {
188 iwl_write_prph_no_grab(trans, ofs,
189 (iwl_read_prph_no_grab(trans, ofs) &
190 mask) | bits);
191 iwl_trans_release_nic_access(trans);
192 }
193}
194IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
195
196void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
197{
198 u32 val;
199
200 if (iwl_trans_grab_nic_access(trans)) {
201 val = iwl_read_prph_no_grab(trans, ofs);
202 iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
203 iwl_trans_release_nic_access(trans);
204 }
205}
206IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
207
208void iwl_force_nmi(struct iwl_trans *trans)
209{
210 if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_9000)
211 iwl_write_prph_delay(trans, DEVICE_SET_NMI_REG,
212 DEVICE_SET_NMI_VAL_DRV, 1);
213 else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
214 iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER,
215 UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER);
216 else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
217 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
218 UREG_DOORBELL_TO_ISR6_NMI_BIT);
219 else
220 iwl_write32(trans, CSR_DOORBELL_VECTOR,
221 CSR_DOORBELL_VECTOR_NMI);
222}
223IWL_EXPORT_SYMBOL(iwl_force_nmi);
224
225static const char *get_rfh_string(int cmd)
226{
227#define IWL_CMD(x) case x: return #x
228#define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }
229
230 int i;
231
232 for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
233 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
234 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
235 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
236 IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
237 }
238
239 switch (cmd) {
240 IWL_CMD(RFH_RXF_DMA_CFG);
241 IWL_CMD(RFH_GEN_CFG);
242 IWL_CMD(RFH_GEN_STATUS);
243 IWL_CMD(FH_TSSR_TX_STATUS_REG);
244 IWL_CMD(FH_TSSR_TX_ERROR_REG);
245 default:
246 return "UNKNOWN";
247 }
248#undef IWL_CMD_MQ
249}
250
251struct reg {
252 u32 addr;
253 bool is64;
254};
255
256static int iwl_dump_rfh(struct iwl_trans *trans, char **buf)
257{
258 int i, q;
259 int num_q = trans->num_rx_queues;
260 static const u32 rfh_tbl[] = {
261 RFH_RXF_DMA_CFG,
262 RFH_GEN_CFG,
263 RFH_GEN_STATUS,
264 FH_TSSR_TX_STATUS_REG,
265 FH_TSSR_TX_ERROR_REG,
266 };
267 static const struct reg rfh_mq_tbl[] = {
268 { RFH_Q0_FRBDCB_BA_LSB, true },
269 { RFH_Q0_FRBDCB_WIDX, false },
270 { RFH_Q0_FRBDCB_RIDX, false },
271 { RFH_Q0_URBD_STTS_WPTR_LSB, true },
272 };
273
274#ifdef CONFIG_IWLWIFI_DEBUGFS
275 if (buf) {
276 int pos = 0;
277
278
279
280
281
282
283
284 size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
285 ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;
286
287 *buf = kmalloc(bufsz, GFP_KERNEL);
288 if (!*buf)
289 return -ENOMEM;
290
291 pos += scnprintf(*buf + pos, bufsz - pos,
292 "RFH register values:\n");
293
294 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
295 pos += scnprintf(*buf + pos, bufsz - pos,
296 "%40s: 0X%08x\n",
297 get_rfh_string(rfh_tbl[i]),
298 iwl_read_prph(trans, rfh_tbl[i]));
299
300 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
301 for (q = 0; q < num_q; q++) {
302 u32 addr = rfh_mq_tbl[i].addr;
303
304 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
305 pos += scnprintf(*buf + pos, bufsz - pos,
306 "%34s(q %2d): 0X%08x\n",
307 get_rfh_string(addr), q,
308 iwl_read_prph(trans, addr));
309 }
310
311 return pos;
312 }
313#endif
314
315 IWL_ERR(trans, "RFH register values:\n");
316 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
317 IWL_ERR(trans, " %34s: 0X%08x\n",
318 get_rfh_string(rfh_tbl[i]),
319 iwl_read_prph(trans, rfh_tbl[i]));
320
321 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
322 for (q = 0; q < num_q; q++) {
323 u32 addr = rfh_mq_tbl[i].addr;
324
325 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
326 IWL_ERR(trans, " %34s(q %d): 0X%08x\n",
327 get_rfh_string(addr), q,
328 iwl_read_prph(trans, addr));
329 }
330
331 return 0;
332}
333
334static const char *get_fh_string(int cmd)
335{
336 switch (cmd) {
337 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
338 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
339 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
340 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
341 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
342 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
343 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
344 IWL_CMD(FH_TSSR_TX_STATUS_REG);
345 IWL_CMD(FH_TSSR_TX_ERROR_REG);
346 default:
347 return "UNKNOWN";
348 }
349#undef IWL_CMD
350}
351
352int iwl_dump_fh(struct iwl_trans *trans, char **buf)
353{
354 int i;
355 static const u32 fh_tbl[] = {
356 FH_RSCSR_CHNL0_STTS_WPTR_REG,
357 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
358 FH_RSCSR_CHNL0_WPTR,
359 FH_MEM_RCSR_CHNL0_CONFIG_REG,
360 FH_MEM_RSSR_SHARED_CTRL_REG,
361 FH_MEM_RSSR_RX_STATUS_REG,
362 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
363 FH_TSSR_TX_STATUS_REG,
364 FH_TSSR_TX_ERROR_REG
365 };
366
367 if (trans->trans_cfg->mq_rx_supported)
368 return iwl_dump_rfh(trans, buf);
369
370#ifdef CONFIG_IWLWIFI_DEBUGFS
371 if (buf) {
372 int pos = 0;
373 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
374
375 *buf = kmalloc(bufsz, GFP_KERNEL);
376 if (!*buf)
377 return -ENOMEM;
378
379 pos += scnprintf(*buf + pos, bufsz - pos,
380 "FH register values:\n");
381
382 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
383 pos += scnprintf(*buf + pos, bufsz - pos,
384 " %34s: 0X%08x\n",
385 get_fh_string(fh_tbl[i]),
386 iwl_read_direct32(trans, fh_tbl[i]));
387
388 return pos;
389 }
390#endif
391
392 IWL_ERR(trans, "FH register values:\n");
393 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
394 IWL_ERR(trans, " %34s: 0X%08x\n",
395 get_fh_string(fh_tbl[i]),
396 iwl_read_direct32(trans, fh_tbl[i]));
397
398 return 0;
399}
400
401int iwl_finish_nic_init(struct iwl_trans *trans,
402 const struct iwl_cfg_trans_params *cfg_trans)
403{
404 u32 poll_ready;
405 int err;
406
407 if (cfg_trans->bisr_workaround) {
408
409 mdelay(2);
410 }
411
412
413
414
415
416 if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_BZ) {
417 iwl_set_bit(trans, CSR_GP_CNTRL,
418 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
419 CSR_GP_CNTRL_REG_FLAG_MAC_INIT);
420 poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
421 } else {
422 iwl_set_bit(trans, CSR_GP_CNTRL,
423 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
424 poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY;
425 }
426
427 if (cfg_trans->device_family == IWL_DEVICE_FAMILY_8000)
428 udelay(2);
429
430
431
432
433
434
435 err = iwl_poll_bit(trans, CSR_GP_CNTRL, poll_ready, poll_ready, 25000);
436 if (err < 0)
437 IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");
438
439 if (cfg_trans->bisr_workaround) {
440
441 udelay(200);
442 }
443
444 return err < 0 ? err : 0;
445}
446IWL_EXPORT_SYMBOL(iwl_finish_nic_init);
447
448void iwl_trans_sync_nmi_with_addr(struct iwl_trans *trans, u32 inta_addr,
449 u32 sw_err_bit)
450{
451 unsigned long timeout = jiffies + IWL_TRANS_NMI_TIMEOUT;
452 bool interrupts_enabled = test_bit(STATUS_INT_ENABLED, &trans->status);
453
454
455
456
457 if (interrupts_enabled)
458 iwl_trans_interrupts(trans, false);
459
460 iwl_force_nmi(trans);
461 while (time_after(timeout, jiffies)) {
462 u32 inta_hw = iwl_read32(trans, inta_addr);
463
464
465 if (inta_hw & sw_err_bit) {
466
467 iwl_write32(trans, inta_addr, inta_hw & sw_err_bit);
468 break;
469 }
470
471 mdelay(1);
472 }
473
474
475
476
477
478 if (interrupts_enabled)
479 iwl_trans_interrupts(trans, true);
480
481 iwl_trans_fw_error(trans, false);
482}
483
