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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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