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c85eb619 EG |
1 | /****************************************************************************** |
2 | * | |
3 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
4 | * redistributing this file, you may do so under either license. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
4e318262 | 8 | * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved. |
c85eb619 EG |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
25 | * in the file called LICENSE.GPL. | |
26 | * | |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
4e318262 | 33 | * Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved. |
c85eb619 EG |
34 | * All rights reserved. |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | * | |
62 | *****************************************************************************/ | |
a42a1844 EG |
63 | #include <linux/pci.h> |
64 | #include <linux/pci-aspm.h> | |
e6bb4c9c | 65 | #include <linux/interrupt.h> |
87e5666c | 66 | #include <linux/debugfs.h> |
cf614297 | 67 | #include <linux/sched.h> |
6d8f6eeb EG |
68 | #include <linux/bitops.h> |
69 | #include <linux/gfp.h> | |
e6bb4c9c | 70 | |
c85eb619 | 71 | #include "iwl-trans.h" |
c17d0681 | 72 | #include "iwl-trans-pcie-int.h" |
522376d2 EG |
73 | #include "iwl-csr.h" |
74 | #include "iwl-prph.h" | |
48f20d35 | 75 | #include "iwl-shared.h" |
522376d2 | 76 | #include "iwl-eeprom.h" |
7a10e3e4 | 77 | #include "iwl-agn-hw.h" |
a6c684ee | 78 | #include "iwl-core.h" |
c85eb619 | 79 | |
5a878bf6 | 80 | static int iwl_trans_rx_alloc(struct iwl_trans *trans) |
c85eb619 | 81 | { |
5a878bf6 EG |
82 | struct iwl_trans_pcie *trans_pcie = |
83 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
84 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; | |
1042db2a | 85 | struct device *dev = trans->dev; |
c85eb619 | 86 | |
5a878bf6 | 87 | memset(&trans_pcie->rxq, 0, sizeof(trans_pcie->rxq)); |
c85eb619 EG |
88 | |
89 | spin_lock_init(&rxq->lock); | |
c85eb619 EG |
90 | |
91 | if (WARN_ON(rxq->bd || rxq->rb_stts)) | |
92 | return -EINVAL; | |
93 | ||
94 | /* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */ | |
84c816da DH |
95 | rxq->bd = dma_zalloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE, |
96 | &rxq->bd_dma, GFP_KERNEL); | |
c85eb619 EG |
97 | if (!rxq->bd) |
98 | goto err_bd; | |
c85eb619 EG |
99 | |
100 | /*Allocate the driver's pointer to receive buffer status */ | |
84c816da DH |
101 | rxq->rb_stts = dma_zalloc_coherent(dev, sizeof(*rxq->rb_stts), |
102 | &rxq->rb_stts_dma, GFP_KERNEL); | |
c85eb619 EG |
103 | if (!rxq->rb_stts) |
104 | goto err_rb_stts; | |
c85eb619 EG |
105 | |
106 | return 0; | |
107 | ||
108 | err_rb_stts: | |
a0f6b0a2 EG |
109 | dma_free_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE, |
110 | rxq->bd, rxq->bd_dma); | |
c85eb619 EG |
111 | memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma)); |
112 | rxq->bd = NULL; | |
113 | err_bd: | |
114 | return -ENOMEM; | |
115 | } | |
116 | ||
5a878bf6 | 117 | static void iwl_trans_rxq_free_rx_bufs(struct iwl_trans *trans) |
c85eb619 | 118 | { |
5a878bf6 EG |
119 | struct iwl_trans_pcie *trans_pcie = |
120 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
121 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; | |
a0f6b0a2 | 122 | int i; |
c85eb619 EG |
123 | |
124 | /* Fill the rx_used queue with _all_ of the Rx buffers */ | |
125 | for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { | |
126 | /* In the reset function, these buffers may have been allocated | |
127 | * to an SKB, so we need to unmap and free potential storage */ | |
128 | if (rxq->pool[i].page != NULL) { | |
1042db2a | 129 | dma_unmap_page(trans->dev, rxq->pool[i].page_dma, |
5a878bf6 | 130 | PAGE_SIZE << hw_params(trans).rx_page_order, |
c85eb619 | 131 | DMA_FROM_DEVICE); |
790428b6 EG |
132 | __free_pages(rxq->pool[i].page, |
133 | hw_params(trans).rx_page_order); | |
c85eb619 EG |
134 | rxq->pool[i].page = NULL; |
135 | } | |
136 | list_add_tail(&rxq->pool[i].list, &rxq->rx_used); | |
137 | } | |
a0f6b0a2 EG |
138 | } |
139 | ||
fd656935 | 140 | static void iwl_trans_rx_hw_init(struct iwl_trans *trans, |
ab697a9f EG |
141 | struct iwl_rx_queue *rxq) |
142 | { | |
143 | u32 rb_size; | |
144 | const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ | |
c17d0681 | 145 | u32 rb_timeout = RX_RB_TIMEOUT; /* FIXME: RX_RB_TIMEOUT for all devices? */ |
ab697a9f EG |
146 | |
147 | if (iwlagn_mod_params.amsdu_size_8K) | |
148 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; | |
149 | else | |
150 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; | |
151 | ||
152 | /* Stop Rx DMA */ | |
1042db2a | 153 | iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
ab697a9f EG |
154 | |
155 | /* Reset driver's Rx queue write index */ | |
1042db2a | 156 | iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); |
ab697a9f EG |
157 | |
158 | /* Tell device where to find RBD circular buffer in DRAM */ | |
1042db2a | 159 | iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_BASE_REG, |
ab697a9f EG |
160 | (u32)(rxq->bd_dma >> 8)); |
161 | ||
162 | /* Tell device where in DRAM to update its Rx status */ | |
1042db2a | 163 | iwl_write_direct32(trans, FH_RSCSR_CHNL0_STTS_WPTR_REG, |
ab697a9f EG |
164 | rxq->rb_stts_dma >> 4); |
165 | ||
166 | /* Enable Rx DMA | |
167 | * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in | |
168 | * the credit mechanism in 5000 HW RX FIFO | |
169 | * Direct rx interrupts to hosts | |
170 | * Rx buffer size 4 or 8k | |
171 | * RB timeout 0x10 | |
172 | * 256 RBDs | |
173 | */ | |
1042db2a | 174 | iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, |
ab697a9f EG |
175 | FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | |
176 | FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY | | |
177 | FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | | |
178 | FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | | |
179 | rb_size| | |
180 | (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)| | |
181 | (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); | |
182 | ||
183 | /* Set interrupt coalescing timer to default (2048 usecs) */ | |
1042db2a | 184 | iwl_write8(trans, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF); |
ab697a9f EG |
185 | } |
186 | ||
5a878bf6 | 187 | static int iwl_rx_init(struct iwl_trans *trans) |
a0f6b0a2 | 188 | { |
5a878bf6 EG |
189 | struct iwl_trans_pcie *trans_pcie = |
190 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
191 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; | |
192 | ||
a0f6b0a2 EG |
193 | int i, err; |
194 | unsigned long flags; | |
195 | ||
196 | if (!rxq->bd) { | |
5a878bf6 | 197 | err = iwl_trans_rx_alloc(trans); |
a0f6b0a2 EG |
198 | if (err) |
199 | return err; | |
200 | } | |
201 | ||
202 | spin_lock_irqsave(&rxq->lock, flags); | |
203 | INIT_LIST_HEAD(&rxq->rx_free); | |
204 | INIT_LIST_HEAD(&rxq->rx_used); | |
205 | ||
5a878bf6 | 206 | iwl_trans_rxq_free_rx_bufs(trans); |
c85eb619 EG |
207 | |
208 | for (i = 0; i < RX_QUEUE_SIZE; i++) | |
209 | rxq->queue[i] = NULL; | |
210 | ||
211 | /* Set us so that we have processed and used all buffers, but have | |
212 | * not restocked the Rx queue with fresh buffers */ | |
213 | rxq->read = rxq->write = 0; | |
214 | rxq->write_actual = 0; | |
215 | rxq->free_count = 0; | |
216 | spin_unlock_irqrestore(&rxq->lock, flags); | |
217 | ||
5a878bf6 | 218 | iwlagn_rx_replenish(trans); |
ab697a9f | 219 | |
fd656935 | 220 | iwl_trans_rx_hw_init(trans, rxq); |
ab697a9f | 221 | |
5a878bf6 | 222 | spin_lock_irqsave(&trans->shrd->lock, flags); |
ab697a9f | 223 | rxq->need_update = 1; |
5a878bf6 EG |
224 | iwl_rx_queue_update_write_ptr(trans, rxq); |
225 | spin_unlock_irqrestore(&trans->shrd->lock, flags); | |
ab697a9f | 226 | |
c85eb619 EG |
227 | return 0; |
228 | } | |
229 | ||
5a878bf6 | 230 | static void iwl_trans_pcie_rx_free(struct iwl_trans *trans) |
a0f6b0a2 | 231 | { |
5a878bf6 EG |
232 | struct iwl_trans_pcie *trans_pcie = |
233 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
234 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; | |
235 | ||
a0f6b0a2 EG |
236 | unsigned long flags; |
237 | ||
238 | /*if rxq->bd is NULL, it means that nothing has been allocated, | |
239 | * exit now */ | |
240 | if (!rxq->bd) { | |
5a878bf6 | 241 | IWL_DEBUG_INFO(trans, "Free NULL rx context\n"); |
a0f6b0a2 EG |
242 | return; |
243 | } | |
244 | ||
245 | spin_lock_irqsave(&rxq->lock, flags); | |
5a878bf6 | 246 | iwl_trans_rxq_free_rx_bufs(trans); |
a0f6b0a2 EG |
247 | spin_unlock_irqrestore(&rxq->lock, flags); |
248 | ||
1042db2a | 249 | dma_free_coherent(trans->dev, sizeof(__le32) * RX_QUEUE_SIZE, |
a0f6b0a2 EG |
250 | rxq->bd, rxq->bd_dma); |
251 | memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma)); | |
252 | rxq->bd = NULL; | |
253 | ||
254 | if (rxq->rb_stts) | |
1042db2a | 255 | dma_free_coherent(trans->dev, |
a0f6b0a2 EG |
256 | sizeof(struct iwl_rb_status), |
257 | rxq->rb_stts, rxq->rb_stts_dma); | |
258 | else | |
5a878bf6 | 259 | IWL_DEBUG_INFO(trans, "Free rxq->rb_stts which is NULL\n"); |
a0f6b0a2 EG |
260 | memset(&rxq->rb_stts_dma, 0, sizeof(rxq->rb_stts_dma)); |
261 | rxq->rb_stts = NULL; | |
262 | } | |
263 | ||
6d8f6eeb | 264 | static int iwl_trans_rx_stop(struct iwl_trans *trans) |
c2c52e8b EG |
265 | { |
266 | ||
267 | /* stop Rx DMA */ | |
1042db2a EG |
268 | iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); |
269 | return iwl_poll_direct_bit(trans, FH_MEM_RSSR_RX_STATUS_REG, | |
c2c52e8b EG |
270 | FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000); |
271 | } | |
272 | ||
6d8f6eeb | 273 | static inline int iwlagn_alloc_dma_ptr(struct iwl_trans *trans, |
02aca585 EG |
274 | struct iwl_dma_ptr *ptr, size_t size) |
275 | { | |
276 | if (WARN_ON(ptr->addr)) | |
277 | return -EINVAL; | |
278 | ||
1042db2a | 279 | ptr->addr = dma_alloc_coherent(trans->dev, size, |
02aca585 EG |
280 | &ptr->dma, GFP_KERNEL); |
281 | if (!ptr->addr) | |
282 | return -ENOMEM; | |
283 | ptr->size = size; | |
284 | return 0; | |
285 | } | |
286 | ||
6d8f6eeb | 287 | static inline void iwlagn_free_dma_ptr(struct iwl_trans *trans, |
1359ca4f EG |
288 | struct iwl_dma_ptr *ptr) |
289 | { | |
290 | if (unlikely(!ptr->addr)) | |
291 | return; | |
292 | ||
1042db2a | 293 | dma_free_coherent(trans->dev, ptr->size, ptr->addr, ptr->dma); |
1359ca4f EG |
294 | memset(ptr, 0, sizeof(*ptr)); |
295 | } | |
296 | ||
6d8f6eeb EG |
297 | static int iwl_trans_txq_alloc(struct iwl_trans *trans, |
298 | struct iwl_tx_queue *txq, int slots_num, | |
299 | u32 txq_id) | |
02aca585 | 300 | { |
ab9e212e | 301 | size_t tfd_sz = sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX; |
02aca585 EG |
302 | int i; |
303 | ||
2c452297 | 304 | if (WARN_ON(txq->meta || txq->cmd || txq->skbs || txq->tfds)) |
02aca585 EG |
305 | return -EINVAL; |
306 | ||
1359ca4f EG |
307 | txq->q.n_window = slots_num; |
308 | ||
7f90dce1 EG |
309 | txq->meta = kcalloc(slots_num, sizeof(txq->meta[0]), GFP_KERNEL); |
310 | txq->cmd = kcalloc(slots_num, sizeof(txq->cmd[0]), GFP_KERNEL); | |
02aca585 EG |
311 | |
312 | if (!txq->meta || !txq->cmd) | |
313 | goto error; | |
314 | ||
dfa2bdba EG |
315 | if (txq_id == trans->shrd->cmd_queue) |
316 | for (i = 0; i < slots_num; i++) { | |
317 | txq->cmd[i] = kmalloc(sizeof(struct iwl_device_cmd), | |
318 | GFP_KERNEL); | |
319 | if (!txq->cmd[i]) | |
320 | goto error; | |
321 | } | |
02aca585 EG |
322 | |
323 | /* Alloc driver data array and TFD circular buffer */ | |
324 | /* Driver private data, only for Tx (not command) queues, | |
325 | * not shared with device. */ | |
6d8f6eeb | 326 | if (txq_id != trans->shrd->cmd_queue) { |
7f90dce1 EG |
327 | txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(txq->skbs[0]), |
328 | GFP_KERNEL); | |
2c452297 | 329 | if (!txq->skbs) { |
6d8f6eeb | 330 | IWL_ERR(trans, "kmalloc for auxiliary BD " |
02aca585 EG |
331 | "structures failed\n"); |
332 | goto error; | |
333 | } | |
334 | } else { | |
2c452297 | 335 | txq->skbs = NULL; |
02aca585 EG |
336 | } |
337 | ||
338 | /* Circular buffer of transmit frame descriptors (TFDs), | |
339 | * shared with device */ | |
1042db2a | 340 | txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz, |
6d8f6eeb | 341 | &txq->q.dma_addr, GFP_KERNEL); |
02aca585 | 342 | if (!txq->tfds) { |
6d8f6eeb | 343 | IWL_ERR(trans, "dma_alloc_coherent(%zd) failed\n", tfd_sz); |
02aca585 EG |
344 | goto error; |
345 | } | |
346 | txq->q.id = txq_id; | |
347 | ||
348 | return 0; | |
349 | error: | |
2c452297 EG |
350 | kfree(txq->skbs); |
351 | txq->skbs = NULL; | |
02aca585 EG |
352 | /* since txq->cmd has been zeroed, |
353 | * all non allocated cmd[i] will be NULL */ | |
dfa2bdba | 354 | if (txq->cmd && txq_id == trans->shrd->cmd_queue) |
02aca585 EG |
355 | for (i = 0; i < slots_num; i++) |
356 | kfree(txq->cmd[i]); | |
357 | kfree(txq->meta); | |
358 | kfree(txq->cmd); | |
359 | txq->meta = NULL; | |
360 | txq->cmd = NULL; | |
361 | ||
362 | return -ENOMEM; | |
363 | ||
364 | } | |
365 | ||
6d8f6eeb | 366 | static int iwl_trans_txq_init(struct iwl_trans *trans, struct iwl_tx_queue *txq, |
02aca585 EG |
367 | int slots_num, u32 txq_id) |
368 | { | |
369 | int ret; | |
370 | ||
371 | txq->need_update = 0; | |
372 | memset(txq->meta, 0, sizeof(txq->meta[0]) * slots_num); | |
373 | ||
374 | /* | |
375 | * For the default queues 0-3, set up the swq_id | |
376 | * already -- all others need to get one later | |
377 | * (if they need one at all). | |
378 | */ | |
379 | if (txq_id < 4) | |
380 | iwl_set_swq_id(txq, txq_id, txq_id); | |
381 | ||
382 | /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise | |
383 | * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */ | |
384 | BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); | |
385 | ||
386 | /* Initialize queue's high/low-water marks, and head/tail indexes */ | |
6d8f6eeb | 387 | ret = iwl_queue_init(&txq->q, TFD_QUEUE_SIZE_MAX, slots_num, |
02aca585 EG |
388 | txq_id); |
389 | if (ret) | |
390 | return ret; | |
391 | ||
392 | /* | |
393 | * Tell nic where to find circular buffer of Tx Frame Descriptors for | |
394 | * given Tx queue, and enable the DMA channel used for that queue. | |
395 | * Circular buffer (TFD queue in DRAM) physical base address */ | |
1042db2a | 396 | iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id), |
02aca585 EG |
397 | txq->q.dma_addr >> 8); |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
c170b867 EG |
402 | /** |
403 | * iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's | |
404 | */ | |
6d8f6eeb | 405 | static void iwl_tx_queue_unmap(struct iwl_trans *trans, int txq_id) |
c170b867 | 406 | { |
8ad71bef EG |
407 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
408 | struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id]; | |
c170b867 | 409 | struct iwl_queue *q = &txq->q; |
39644e9a | 410 | enum dma_data_direction dma_dir; |
984ecb92 | 411 | unsigned long flags; |
cda4ee3f | 412 | spinlock_t *lock; |
c170b867 EG |
413 | |
414 | if (!q->n_bd) | |
415 | return; | |
416 | ||
39644e9a EG |
417 | /* In the command queue, all the TBs are mapped as BIDI |
418 | * so unmap them as such. | |
419 | */ | |
cda4ee3f | 420 | if (txq_id == trans->shrd->cmd_queue) { |
39644e9a | 421 | dma_dir = DMA_BIDIRECTIONAL; |
cda4ee3f EG |
422 | lock = &trans->hcmd_lock; |
423 | } else { | |
39644e9a | 424 | dma_dir = DMA_TO_DEVICE; |
cda4ee3f EG |
425 | lock = &trans->shrd->sta_lock; |
426 | } | |
39644e9a | 427 | |
cda4ee3f | 428 | spin_lock_irqsave(lock, flags); |
c170b867 EG |
429 | while (q->write_ptr != q->read_ptr) { |
430 | /* The read_ptr needs to bound by q->n_window */ | |
39644e9a EG |
431 | iwlagn_txq_free_tfd(trans, txq, get_cmd_index(q, q->read_ptr), |
432 | dma_dir); | |
c170b867 EG |
433 | q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd); |
434 | } | |
cda4ee3f | 435 | spin_unlock_irqrestore(lock, flags); |
c170b867 EG |
436 | } |
437 | ||
1359ca4f EG |
438 | /** |
439 | * iwl_tx_queue_free - Deallocate DMA queue. | |
440 | * @txq: Transmit queue to deallocate. | |
441 | * | |
442 | * Empty queue by removing and destroying all BD's. | |
443 | * Free all buffers. | |
444 | * 0-fill, but do not free "txq" descriptor structure. | |
445 | */ | |
6d8f6eeb | 446 | static void iwl_tx_queue_free(struct iwl_trans *trans, int txq_id) |
1359ca4f | 447 | { |
8ad71bef EG |
448 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
449 | struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id]; | |
1042db2a | 450 | struct device *dev = trans->dev; |
1359ca4f EG |
451 | int i; |
452 | if (WARN_ON(!txq)) | |
453 | return; | |
454 | ||
6d8f6eeb | 455 | iwl_tx_queue_unmap(trans, txq_id); |
1359ca4f EG |
456 | |
457 | /* De-alloc array of command/tx buffers */ | |
dfa2bdba EG |
458 | |
459 | if (txq_id == trans->shrd->cmd_queue) | |
460 | for (i = 0; i < txq->q.n_window; i++) | |
461 | kfree(txq->cmd[i]); | |
1359ca4f EG |
462 | |
463 | /* De-alloc circular buffer of TFDs */ | |
464 | if (txq->q.n_bd) { | |
ab9e212e | 465 | dma_free_coherent(dev, sizeof(struct iwl_tfd) * |
1359ca4f EG |
466 | txq->q.n_bd, txq->tfds, txq->q.dma_addr); |
467 | memset(&txq->q.dma_addr, 0, sizeof(txq->q.dma_addr)); | |
468 | } | |
469 | ||
470 | /* De-alloc array of per-TFD driver data */ | |
2c452297 EG |
471 | kfree(txq->skbs); |
472 | txq->skbs = NULL; | |
1359ca4f EG |
473 | |
474 | /* deallocate arrays */ | |
475 | kfree(txq->cmd); | |
476 | kfree(txq->meta); | |
477 | txq->cmd = NULL; | |
478 | txq->meta = NULL; | |
479 | ||
480 | /* 0-fill queue descriptor structure */ | |
481 | memset(txq, 0, sizeof(*txq)); | |
482 | } | |
483 | ||
484 | /** | |
485 | * iwl_trans_tx_free - Free TXQ Context | |
486 | * | |
487 | * Destroy all TX DMA queues and structures | |
488 | */ | |
6d8f6eeb | 489 | static void iwl_trans_pcie_tx_free(struct iwl_trans *trans) |
1359ca4f EG |
490 | { |
491 | int txq_id; | |
8ad71bef | 492 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
1359ca4f EG |
493 | |
494 | /* Tx queues */ | |
8ad71bef | 495 | if (trans_pcie->txq) { |
d6189124 | 496 | for (txq_id = 0; |
6d8f6eeb EG |
497 | txq_id < hw_params(trans).max_txq_num; txq_id++) |
498 | iwl_tx_queue_free(trans, txq_id); | |
1359ca4f EG |
499 | } |
500 | ||
8ad71bef EG |
501 | kfree(trans_pcie->txq); |
502 | trans_pcie->txq = NULL; | |
1359ca4f | 503 | |
9d6b2cb1 | 504 | iwlagn_free_dma_ptr(trans, &trans_pcie->kw); |
1359ca4f | 505 | |
6d8f6eeb | 506 | iwlagn_free_dma_ptr(trans, &trans_pcie->scd_bc_tbls); |
1359ca4f EG |
507 | } |
508 | ||
02aca585 EG |
509 | /** |
510 | * iwl_trans_tx_alloc - allocate TX context | |
511 | * Allocate all Tx DMA structures and initialize them | |
512 | * | |
513 | * @param priv | |
514 | * @return error code | |
515 | */ | |
6d8f6eeb | 516 | static int iwl_trans_tx_alloc(struct iwl_trans *trans) |
02aca585 EG |
517 | { |
518 | int ret; | |
519 | int txq_id, slots_num; | |
8ad71bef | 520 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
02aca585 | 521 | |
fd656935 | 522 | u16 scd_bc_tbls_size = hw_params(trans).max_txq_num * |
ab9e212e EG |
523 | sizeof(struct iwlagn_scd_bc_tbl); |
524 | ||
02aca585 EG |
525 | /*It is not allowed to alloc twice, so warn when this happens. |
526 | * We cannot rely on the previous allocation, so free and fail */ | |
8ad71bef | 527 | if (WARN_ON(trans_pcie->txq)) { |
02aca585 EG |
528 | ret = -EINVAL; |
529 | goto error; | |
530 | } | |
531 | ||
6d8f6eeb | 532 | ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls, |
ab9e212e | 533 | scd_bc_tbls_size); |
02aca585 | 534 | if (ret) { |
6d8f6eeb | 535 | IWL_ERR(trans, "Scheduler BC Table allocation failed\n"); |
02aca585 EG |
536 | goto error; |
537 | } | |
538 | ||
539 | /* Alloc keep-warm buffer */ | |
9d6b2cb1 | 540 | ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->kw, IWL_KW_SIZE); |
02aca585 | 541 | if (ret) { |
6d8f6eeb | 542 | IWL_ERR(trans, "Keep Warm allocation failed\n"); |
02aca585 EG |
543 | goto error; |
544 | } | |
545 | ||
7f90dce1 EG |
546 | trans_pcie->txq = kcalloc(hw_params(trans).max_txq_num, |
547 | sizeof(struct iwl_tx_queue), GFP_KERNEL); | |
8ad71bef | 548 | if (!trans_pcie->txq) { |
6d8f6eeb | 549 | IWL_ERR(trans, "Not enough memory for txq\n"); |
02aca585 EG |
550 | ret = ENOMEM; |
551 | goto error; | |
552 | } | |
553 | ||
554 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ | |
6d8f6eeb EG |
555 | for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) { |
556 | slots_num = (txq_id == trans->shrd->cmd_queue) ? | |
02aca585 | 557 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
8ad71bef EG |
558 | ret = iwl_trans_txq_alloc(trans, &trans_pcie->txq[txq_id], |
559 | slots_num, txq_id); | |
02aca585 | 560 | if (ret) { |
6d8f6eeb | 561 | IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id); |
02aca585 EG |
562 | goto error; |
563 | } | |
564 | } | |
565 | ||
566 | return 0; | |
567 | ||
568 | error: | |
ae2c30bf | 569 | iwl_trans_pcie_tx_free(trans); |
02aca585 EG |
570 | |
571 | return ret; | |
572 | } | |
6d8f6eeb | 573 | static int iwl_tx_init(struct iwl_trans *trans) |
02aca585 EG |
574 | { |
575 | int ret; | |
576 | int txq_id, slots_num; | |
577 | unsigned long flags; | |
578 | bool alloc = false; | |
8ad71bef | 579 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
02aca585 | 580 | |
8ad71bef | 581 | if (!trans_pcie->txq) { |
6d8f6eeb | 582 | ret = iwl_trans_tx_alloc(trans); |
02aca585 EG |
583 | if (ret) |
584 | goto error; | |
585 | alloc = true; | |
586 | } | |
587 | ||
6d8f6eeb | 588 | spin_lock_irqsave(&trans->shrd->lock, flags); |
02aca585 EG |
589 | |
590 | /* Turn off all Tx DMA fifos */ | |
1042db2a | 591 | iwl_write_prph(trans, SCD_TXFACT, 0); |
02aca585 EG |
592 | |
593 | /* Tell NIC where to find the "keep warm" buffer */ | |
1042db2a | 594 | iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG, |
83ed9015 | 595 | trans_pcie->kw.dma >> 4); |
02aca585 | 596 | |
6d8f6eeb | 597 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
02aca585 EG |
598 | |
599 | /* Alloc and init all Tx queues, including the command queue (#4/#9) */ | |
6d8f6eeb EG |
600 | for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) { |
601 | slots_num = (txq_id == trans->shrd->cmd_queue) ? | |
02aca585 | 602 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; |
8ad71bef EG |
603 | ret = iwl_trans_txq_init(trans, &trans_pcie->txq[txq_id], |
604 | slots_num, txq_id); | |
02aca585 | 605 | if (ret) { |
6d8f6eeb | 606 | IWL_ERR(trans, "Tx %d queue init failed\n", txq_id); |
02aca585 EG |
607 | goto error; |
608 | } | |
609 | } | |
610 | ||
611 | return 0; | |
612 | error: | |
613 | /*Upon error, free only if we allocated something */ | |
614 | if (alloc) | |
ae2c30bf | 615 | iwl_trans_pcie_tx_free(trans); |
02aca585 EG |
616 | return ret; |
617 | } | |
618 | ||
3e10caeb | 619 | static void iwl_set_pwr_vmain(struct iwl_trans *trans) |
392f8b78 EG |
620 | { |
621 | /* | |
622 | * (for documentation purposes) | |
623 | * to set power to V_AUX, do: | |
624 | ||
625 | if (pci_pme_capable(priv->pci_dev, PCI_D3cold)) | |
1042db2a | 626 | iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG, |
392f8b78 EG |
627 | APMG_PS_CTRL_VAL_PWR_SRC_VAUX, |
628 | ~APMG_PS_CTRL_MSK_PWR_SRC); | |
629 | */ | |
630 | ||
1042db2a | 631 | iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG, |
392f8b78 EG |
632 | APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, |
633 | ~APMG_PS_CTRL_MSK_PWR_SRC); | |
634 | } | |
635 | ||
af634bee EG |
636 | /* PCI registers */ |
637 | #define PCI_CFG_RETRY_TIMEOUT 0x041 | |
638 | #define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01 | |
639 | #define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02 | |
640 | ||
641 | static u16 iwl_pciexp_link_ctrl(struct iwl_trans *trans) | |
642 | { | |
643 | int pos; | |
644 | u16 pci_lnk_ctl; | |
645 | struct iwl_trans_pcie *trans_pcie = | |
646 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
647 | ||
648 | struct pci_dev *pci_dev = trans_pcie->pci_dev; | |
649 | ||
650 | pos = pci_pcie_cap(pci_dev); | |
651 | pci_read_config_word(pci_dev, pos + PCI_EXP_LNKCTL, &pci_lnk_ctl); | |
652 | return pci_lnk_ctl; | |
653 | } | |
654 | ||
655 | static void iwl_apm_config(struct iwl_trans *trans) | |
656 | { | |
657 | /* | |
658 | * HW bug W/A for instability in PCIe bus L0S->L1 transition. | |
659 | * Check if BIOS (or OS) enabled L1-ASPM on this device. | |
660 | * If so (likely), disable L0S, so device moves directly L0->L1; | |
661 | * costs negligible amount of power savings. | |
662 | * If not (unlikely), enable L0S, so there is at least some | |
663 | * power savings, even without L1. | |
664 | */ | |
665 | u16 lctl = iwl_pciexp_link_ctrl(trans); | |
666 | ||
667 | if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == | |
668 | PCI_CFG_LINK_CTRL_VAL_L1_EN) { | |
669 | /* L1-ASPM enabled; disable(!) L0S */ | |
670 | iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); | |
671 | dev_printk(KERN_INFO, trans->dev, | |
672 | "L1 Enabled; Disabling L0S\n"); | |
673 | } else { | |
674 | /* L1-ASPM disabled; enable(!) L0S */ | |
675 | iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED); | |
676 | dev_printk(KERN_INFO, trans->dev, | |
677 | "L1 Disabled; Enabling L0S\n"); | |
678 | } | |
f6d0e9be | 679 | trans->pm_support = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN); |
af634bee EG |
680 | } |
681 | ||
a6c684ee EG |
682 | /* |
683 | * Start up NIC's basic functionality after it has been reset | |
684 | * (e.g. after platform boot, or shutdown via iwl_apm_stop()) | |
685 | * NOTE: This does not load uCode nor start the embedded processor | |
686 | */ | |
687 | static int iwl_apm_init(struct iwl_trans *trans) | |
688 | { | |
689 | int ret = 0; | |
690 | IWL_DEBUG_INFO(trans, "Init card's basic functions\n"); | |
691 | ||
692 | /* | |
693 | * Use "set_bit" below rather than "write", to preserve any hardware | |
694 | * bits already set by default after reset. | |
695 | */ | |
696 | ||
697 | /* Disable L0S exit timer (platform NMI Work/Around) */ | |
698 | iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, | |
699 | CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); | |
700 | ||
701 | /* | |
702 | * Disable L0s without affecting L1; | |
703 | * don't wait for ICH L0s (ICH bug W/A) | |
704 | */ | |
705 | iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, | |
706 | CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX); | |
707 | ||
708 | /* Set FH wait threshold to maximum (HW error during stress W/A) */ | |
709 | iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL); | |
710 | ||
711 | /* | |
712 | * Enable HAP INTA (interrupt from management bus) to | |
713 | * wake device's PCI Express link L1a -> L0s | |
714 | */ | |
715 | iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, | |
716 | CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); | |
717 | ||
af634bee | 718 | iwl_apm_config(trans); |
a6c684ee EG |
719 | |
720 | /* Configure analog phase-lock-loop before activating to D0A */ | |
721 | if (cfg(trans)->base_params->pll_cfg_val) | |
722 | iwl_set_bit(trans, CSR_ANA_PLL_CFG, | |
723 | cfg(trans)->base_params->pll_cfg_val); | |
724 | ||
725 | /* | |
726 | * Set "initialization complete" bit to move adapter from | |
727 | * D0U* --> D0A* (powered-up active) state. | |
728 | */ | |
729 | iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); | |
730 | ||
731 | /* | |
732 | * Wait for clock stabilization; once stabilized, access to | |
733 | * device-internal resources is supported, e.g. iwl_write_prph() | |
734 | * and accesses to uCode SRAM. | |
735 | */ | |
736 | ret = iwl_poll_bit(trans, CSR_GP_CNTRL, | |
737 | CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, | |
738 | CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); | |
739 | if (ret < 0) { | |
740 | IWL_DEBUG_INFO(trans, "Failed to init the card\n"); | |
741 | goto out; | |
742 | } | |
743 | ||
744 | /* | |
745 | * Enable DMA clock and wait for it to stabilize. | |
746 | * | |
747 | * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits | |
748 | * do not disable clocks. This preserves any hardware bits already | |
749 | * set by default in "CLK_CTRL_REG" after reset. | |
750 | */ | |
751 | iwl_write_prph(trans, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT); | |
752 | udelay(20); | |
753 | ||
754 | /* Disable L1-Active */ | |
755 | iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG, | |
756 | APMG_PCIDEV_STT_VAL_L1_ACT_DIS); | |
757 | ||
758 | set_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status); | |
759 | ||
760 | out: | |
761 | return ret; | |
762 | } | |
763 | ||
cc56feb2 EG |
764 | static int iwl_apm_stop_master(struct iwl_trans *trans) |
765 | { | |
766 | int ret = 0; | |
767 | ||
768 | /* stop device's busmaster DMA activity */ | |
769 | iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); | |
770 | ||
771 | ret = iwl_poll_bit(trans, CSR_RESET, | |
772 | CSR_RESET_REG_FLAG_MASTER_DISABLED, | |
773 | CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); | |
774 | if (ret) | |
775 | IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n"); | |
776 | ||
777 | IWL_DEBUG_INFO(trans, "stop master\n"); | |
778 | ||
779 | return ret; | |
780 | } | |
781 | ||
782 | static void iwl_apm_stop(struct iwl_trans *trans) | |
783 | { | |
784 | IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n"); | |
785 | ||
786 | clear_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status); | |
787 | ||
788 | /* Stop device's DMA activity */ | |
789 | iwl_apm_stop_master(trans); | |
790 | ||
791 | /* Reset the entire device */ | |
792 | iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); | |
793 | ||
794 | udelay(10); | |
795 | ||
796 | /* | |
797 | * Clear "initialization complete" bit to move adapter from | |
798 | * D0A* (powered-up Active) --> D0U* (Uninitialized) state. | |
799 | */ | |
800 | iwl_clear_bit(trans, CSR_GP_CNTRL, | |
801 | CSR_GP_CNTRL_REG_FLAG_INIT_DONE); | |
802 | } | |
803 | ||
6d8f6eeb | 804 | static int iwl_nic_init(struct iwl_trans *trans) |
392f8b78 EG |
805 | { |
806 | unsigned long flags; | |
807 | ||
808 | /* nic_init */ | |
6d8f6eeb | 809 | spin_lock_irqsave(&trans->shrd->lock, flags); |
a6c684ee | 810 | iwl_apm_init(trans); |
392f8b78 EG |
811 | |
812 | /* Set interrupt coalescing calibration timer to default (512 usecs) */ | |
1042db2a | 813 | iwl_write8(trans, CSR_INT_COALESCING, |
83ed9015 | 814 | IWL_HOST_INT_CALIB_TIMEOUT_DEF); |
392f8b78 | 815 | |
6d8f6eeb | 816 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
392f8b78 | 817 | |
3e10caeb | 818 | iwl_set_pwr_vmain(trans); |
392f8b78 | 819 | |
7a10e3e4 | 820 | iwl_nic_config(priv(trans)); |
392f8b78 | 821 | |
a5916977 | 822 | #ifndef CONFIG_IWLWIFI_IDI |
392f8b78 | 823 | /* Allocate the RX queue, or reset if it is already allocated */ |
6d8f6eeb | 824 | iwl_rx_init(trans); |
a5916977 | 825 | #endif |
392f8b78 EG |
826 | |
827 | /* Allocate or reset and init all Tx and Command queues */ | |
6d8f6eeb | 828 | if (iwl_tx_init(trans)) |
392f8b78 EG |
829 | return -ENOMEM; |
830 | ||
fd656935 | 831 | if (hw_params(trans).shadow_reg_enable) { |
392f8b78 | 832 | /* enable shadow regs in HW */ |
1042db2a | 833 | iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, |
392f8b78 EG |
834 | 0x800FFFFF); |
835 | } | |
836 | ||
6d8f6eeb | 837 | set_bit(STATUS_INIT, &trans->shrd->status); |
392f8b78 EG |
838 | |
839 | return 0; | |
840 | } | |
841 | ||
842 | #define HW_READY_TIMEOUT (50) | |
843 | ||
844 | /* Note: returns poll_bit return value, which is >= 0 if success */ | |
6d8f6eeb | 845 | static int iwl_set_hw_ready(struct iwl_trans *trans) |
392f8b78 EG |
846 | { |
847 | int ret; | |
848 | ||
1042db2a | 849 | iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, |
392f8b78 EG |
850 | CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); |
851 | ||
852 | /* See if we got it */ | |
1042db2a | 853 | ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG, |
392f8b78 EG |
854 | CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, |
855 | CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, | |
856 | HW_READY_TIMEOUT); | |
857 | ||
6d8f6eeb | 858 | IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : ""); |
392f8b78 EG |
859 | return ret; |
860 | } | |
861 | ||
862 | /* Note: returns standard 0/-ERROR code */ | |
ebb7678d | 863 | static int iwl_prepare_card_hw(struct iwl_trans *trans) |
392f8b78 EG |
864 | { |
865 | int ret; | |
866 | ||
6d8f6eeb | 867 | IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n"); |
392f8b78 | 868 | |
6d8f6eeb | 869 | ret = iwl_set_hw_ready(trans); |
ebb7678d | 870 | /* If the card is ready, exit 0 */ |
392f8b78 EG |
871 | if (ret >= 0) |
872 | return 0; | |
873 | ||
874 | /* If HW is not ready, prepare the conditions to check again */ | |
1042db2a | 875 | iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, |
392f8b78 EG |
876 | CSR_HW_IF_CONFIG_REG_PREPARE); |
877 | ||
1042db2a | 878 | ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG, |
392f8b78 EG |
879 | ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, |
880 | CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000); | |
881 | ||
882 | if (ret < 0) | |
883 | return ret; | |
884 | ||
885 | /* HW should be ready by now, check again. */ | |
6d8f6eeb | 886 | ret = iwl_set_hw_ready(trans); |
392f8b78 EG |
887 | if (ret >= 0) |
888 | return 0; | |
889 | return ret; | |
890 | } | |
891 | ||
e13c0c59 EG |
892 | #define IWL_AC_UNSET -1 |
893 | ||
894 | struct queue_to_fifo_ac { | |
895 | s8 fifo, ac; | |
896 | }; | |
897 | ||
898 | static const struct queue_to_fifo_ac iwlagn_default_queue_to_tx_fifo[] = { | |
899 | { IWL_TX_FIFO_VO, IEEE80211_AC_VO, }, | |
900 | { IWL_TX_FIFO_VI, IEEE80211_AC_VI, }, | |
901 | { IWL_TX_FIFO_BE, IEEE80211_AC_BE, }, | |
902 | { IWL_TX_FIFO_BK, IEEE80211_AC_BK, }, | |
903 | { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, }, | |
904 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, | |
905 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, | |
906 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, | |
907 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, | |
908 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, | |
909 | { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, }, | |
910 | }; | |
911 | ||
912 | static const struct queue_to_fifo_ac iwlagn_ipan_queue_to_tx_fifo[] = { | |
913 | { IWL_TX_FIFO_VO, IEEE80211_AC_VO, }, | |
914 | { IWL_TX_FIFO_VI, IEEE80211_AC_VI, }, | |
915 | { IWL_TX_FIFO_BE, IEEE80211_AC_BE, }, | |
916 | { IWL_TX_FIFO_BK, IEEE80211_AC_BK, }, | |
917 | { IWL_TX_FIFO_BK_IPAN, IEEE80211_AC_BK, }, | |
918 | { IWL_TX_FIFO_BE_IPAN, IEEE80211_AC_BE, }, | |
919 | { IWL_TX_FIFO_VI_IPAN, IEEE80211_AC_VI, }, | |
920 | { IWL_TX_FIFO_VO_IPAN, IEEE80211_AC_VO, }, | |
921 | { IWL_TX_FIFO_BE_IPAN, 2, }, | |
922 | { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, }, | |
923 | { IWL_TX_FIFO_AUX, IWL_AC_UNSET, }, | |
924 | }; | |
925 | ||
926 | static const u8 iwlagn_bss_ac_to_fifo[] = { | |
927 | IWL_TX_FIFO_VO, | |
928 | IWL_TX_FIFO_VI, | |
929 | IWL_TX_FIFO_BE, | |
930 | IWL_TX_FIFO_BK, | |
931 | }; | |
932 | static const u8 iwlagn_bss_ac_to_queue[] = { | |
933 | 0, 1, 2, 3, | |
934 | }; | |
935 | static const u8 iwlagn_pan_ac_to_fifo[] = { | |
936 | IWL_TX_FIFO_VO_IPAN, | |
937 | IWL_TX_FIFO_VI_IPAN, | |
938 | IWL_TX_FIFO_BE_IPAN, | |
939 | IWL_TX_FIFO_BK_IPAN, | |
940 | }; | |
941 | static const u8 iwlagn_pan_ac_to_queue[] = { | |
942 | 7, 6, 5, 4, | |
943 | }; | |
944 | ||
cf614297 EG |
945 | /* |
946 | * ucode | |
947 | */ | |
948 | static int iwl_load_section(struct iwl_trans *trans, const char *name, | |
949 | struct fw_desc *image, u32 dst_addr) | |
950 | { | |
951 | dma_addr_t phy_addr = image->p_addr; | |
952 | u32 byte_cnt = image->len; | |
953 | int ret; | |
954 | ||
955 | trans->ucode_write_complete = 0; | |
956 | ||
957 | iwl_write_direct32(trans, | |
958 | FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), | |
959 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE); | |
960 | ||
961 | iwl_write_direct32(trans, | |
962 | FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL), dst_addr); | |
963 | ||
964 | iwl_write_direct32(trans, | |
965 | FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL), | |
966 | phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK); | |
967 | ||
968 | iwl_write_direct32(trans, | |
969 | FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL), | |
970 | (iwl_get_dma_hi_addr(phy_addr) | |
971 | << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt); | |
972 | ||
973 | iwl_write_direct32(trans, | |
974 | FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL), | |
975 | 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM | | |
976 | 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX | | |
977 | FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID); | |
978 | ||
979 | iwl_write_direct32(trans, | |
980 | FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), | |
981 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | | |
982 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE | | |
983 | FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD); | |
984 | ||
985 | IWL_DEBUG_FW(trans, "%s uCode section being loaded...\n", name); | |
986 | ret = wait_event_timeout(trans->shrd->wait_command_queue, | |
987 | trans->ucode_write_complete, 5 * HZ); | |
988 | if (!ret) { | |
989 | IWL_ERR(trans, "Could not load the %s uCode section\n", | |
990 | name); | |
991 | return -ETIMEDOUT; | |
992 | } | |
993 | ||
994 | return 0; | |
995 | } | |
996 | ||
997 | static int iwl_load_given_ucode(struct iwl_trans *trans, struct fw_img *image) | |
998 | { | |
999 | int ret = 0; | |
1000 | ||
1001 | ret = iwl_load_section(trans, "INST", &image->code, | |
1002 | IWLAGN_RTC_INST_LOWER_BOUND); | |
1003 | if (ret) | |
1004 | return ret; | |
1005 | ||
1006 | ret = iwl_load_section(trans, "DATA", &image->data, | |
1007 | IWLAGN_RTC_DATA_LOWER_BOUND); | |
1008 | if (ret) | |
1009 | return ret; | |
1010 | ||
1011 | /* Remove all resets to allow NIC to operate */ | |
1012 | iwl_write32(trans, CSR_RESET, 0); | |
1013 | ||
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | static int iwl_trans_pcie_start_fw(struct iwl_trans *trans, struct fw_img *fw) | |
392f8b78 EG |
1018 | { |
1019 | int ret; | |
e13c0c59 EG |
1020 | struct iwl_trans_pcie *trans_pcie = |
1021 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
392f8b78 | 1022 | |
c91bd124 | 1023 | trans->shrd->ucode_owner = IWL_OWNERSHIP_DRIVER; |
e13c0c59 EG |
1024 | trans_pcie->ac_to_queue[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_queue; |
1025 | trans_pcie->ac_to_queue[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_queue; | |
1026 | ||
1027 | trans_pcie->ac_to_fifo[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_fifo; | |
1028 | trans_pcie->ac_to_fifo[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_fifo; | |
1029 | ||
1030 | trans_pcie->mcast_queue[IWL_RXON_CTX_BSS] = 0; | |
1031 | trans_pcie->mcast_queue[IWL_RXON_CTX_PAN] = IWL_IPAN_MCAST_QUEUE; | |
392f8b78 | 1032 | |
c91bd124 | 1033 | if ((hw_params(trans).sku & EEPROM_SKU_CAP_AMT_ENABLE) && |
ebb7678d | 1034 | iwl_prepare_card_hw(trans)) { |
6d8f6eeb | 1035 | IWL_WARN(trans, "Exit HW not ready\n"); |
392f8b78 EG |
1036 | return -EIO; |
1037 | } | |
1038 | ||
1039 | /* If platform's RF_KILL switch is NOT set to KILL */ | |
1042db2a | 1040 | if (iwl_read32(trans, CSR_GP_CNTRL) & |
392f8b78 | 1041 | CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) |
6d8f6eeb | 1042 | clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status); |
392f8b78 | 1043 | else |
6d8f6eeb | 1044 | set_bit(STATUS_RF_KILL_HW, &trans->shrd->status); |
392f8b78 | 1045 | |
6d8f6eeb | 1046 | if (iwl_is_rfkill(trans->shrd)) { |
3e10caeb | 1047 | iwl_set_hw_rfkill_state(priv(trans), true); |
6d8f6eeb | 1048 | iwl_enable_interrupts(trans); |
392f8b78 EG |
1049 | return -ERFKILL; |
1050 | } | |
1051 | ||
1042db2a | 1052 | iwl_write32(trans, CSR_INT, 0xFFFFFFFF); |
392f8b78 | 1053 | |
6d8f6eeb | 1054 | ret = iwl_nic_init(trans); |
392f8b78 | 1055 | if (ret) { |
6d8f6eeb | 1056 | IWL_ERR(trans, "Unable to init nic\n"); |
392f8b78 EG |
1057 | return ret; |
1058 | } | |
1059 | ||
1060 | /* make sure rfkill handshake bits are cleared */ | |
1042db2a EG |
1061 | iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
1062 | iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, | |
392f8b78 EG |
1063 | CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); |
1064 | ||
1065 | /* clear (again), then enable host interrupts */ | |
1042db2a | 1066 | iwl_write32(trans, CSR_INT, 0xFFFFFFFF); |
6d8f6eeb | 1067 | iwl_enable_interrupts(trans); |
392f8b78 EG |
1068 | |
1069 | /* really make sure rfkill handshake bits are cleared */ | |
1042db2a EG |
1070 | iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); |
1071 | iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); | |
392f8b78 | 1072 | |
cf614297 EG |
1073 | /* Load the given image to the HW */ |
1074 | iwl_load_given_ucode(trans, fw); | |
1075 | ||
392f8b78 EG |
1076 | return 0; |
1077 | } | |
1078 | ||
b3c2ce13 EG |
1079 | /* |
1080 | * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask | |
10b15e6f | 1081 | * must be called under priv->shrd->lock and mac access |
b3c2ce13 | 1082 | */ |
6d8f6eeb | 1083 | static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask) |
b3c2ce13 | 1084 | { |
1042db2a | 1085 | iwl_write_prph(trans, SCD_TXFACT, mask); |
b3c2ce13 EG |
1086 | } |
1087 | ||
ed6a3803 | 1088 | static void iwl_tx_start(struct iwl_trans *trans) |
b3c2ce13 EG |
1089 | { |
1090 | const struct queue_to_fifo_ac *queue_to_fifo; | |
105183b1 EG |
1091 | struct iwl_trans_pcie *trans_pcie = |
1092 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
b3c2ce13 EG |
1093 | u32 a; |
1094 | unsigned long flags; | |
1095 | int i, chan; | |
1096 | u32 reg_val; | |
1097 | ||
105183b1 | 1098 | spin_lock_irqsave(&trans->shrd->lock, flags); |
b3c2ce13 | 1099 | |
83ed9015 | 1100 | trans_pcie->scd_base_addr = |
1042db2a | 1101 | iwl_read_prph(trans, SCD_SRAM_BASE_ADDR); |
105183b1 | 1102 | a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND; |
b3c2ce13 | 1103 | /* reset conext data memory */ |
105183b1 | 1104 | for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND; |
b3c2ce13 | 1105 | a += 4) |
1042db2a | 1106 | iwl_write_targ_mem(trans, a, 0); |
b3c2ce13 | 1107 | /* reset tx status memory */ |
105183b1 | 1108 | for (; a < trans_pcie->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND; |
b3c2ce13 | 1109 | a += 4) |
1042db2a | 1110 | iwl_write_targ_mem(trans, a, 0); |
105183b1 | 1111 | for (; a < trans_pcie->scd_base_addr + |
c91bd124 | 1112 | SCD_TRANS_TBL_OFFSET_QUEUE(hw_params(trans).max_txq_num); |
d6189124 | 1113 | a += 4) |
1042db2a | 1114 | iwl_write_targ_mem(trans, a, 0); |
b3c2ce13 | 1115 | |
1042db2a | 1116 | iwl_write_prph(trans, SCD_DRAM_BASE_ADDR, |
105183b1 | 1117 | trans_pcie->scd_bc_tbls.dma >> 10); |
b3c2ce13 EG |
1118 | |
1119 | /* Enable DMA channel */ | |
1120 | for (chan = 0; chan < FH_TCSR_CHNL_NUM ; chan++) | |
1042db2a | 1121 | iwl_write_direct32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(chan), |
b3c2ce13 EG |
1122 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | |
1123 | FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE); | |
1124 | ||
1125 | /* Update FH chicken bits */ | |
1042db2a EG |
1126 | reg_val = iwl_read_direct32(trans, FH_TX_CHICKEN_BITS_REG); |
1127 | iwl_write_direct32(trans, FH_TX_CHICKEN_BITS_REG, | |
b3c2ce13 EG |
1128 | reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN); |
1129 | ||
1042db2a | 1130 | iwl_write_prph(trans, SCD_QUEUECHAIN_SEL, |
c91bd124 | 1131 | SCD_QUEUECHAIN_SEL_ALL(trans)); |
1042db2a | 1132 | iwl_write_prph(trans, SCD_AGGR_SEL, 0); |
b3c2ce13 EG |
1133 | |
1134 | /* initiate the queues */ | |
c91bd124 | 1135 | for (i = 0; i < hw_params(trans).max_txq_num; i++) { |
1042db2a EG |
1136 | iwl_write_prph(trans, SCD_QUEUE_RDPTR(i), 0); |
1137 | iwl_write_direct32(trans, HBUS_TARG_WRPTR, 0 | (i << 8)); | |
1138 | iwl_write_targ_mem(trans, trans_pcie->scd_base_addr + | |
b3c2ce13 | 1139 | SCD_CONTEXT_QUEUE_OFFSET(i), 0); |
1042db2a | 1140 | iwl_write_targ_mem(trans, trans_pcie->scd_base_addr + |
b3c2ce13 EG |
1141 | SCD_CONTEXT_QUEUE_OFFSET(i) + |
1142 | sizeof(u32), | |
1143 | ((SCD_WIN_SIZE << | |
1144 | SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) & | |
1145 | SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) | | |
1146 | ((SCD_FRAME_LIMIT << | |
1147 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & | |
1148 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK)); | |
1149 | } | |
1150 | ||
1042db2a | 1151 | iwl_write_prph(trans, SCD_INTERRUPT_MASK, |
105183b1 | 1152 | IWL_MASK(0, hw_params(trans).max_txq_num)); |
b3c2ce13 EG |
1153 | |
1154 | /* Activate all Tx DMA/FIFO channels */ | |
6d8f6eeb | 1155 | iwl_trans_txq_set_sched(trans, IWL_MASK(0, 7)); |
b3c2ce13 EG |
1156 | |
1157 | /* map queues to FIFOs */ | |
7a10e3e4 | 1158 | if (trans->shrd->valid_contexts != BIT(IWL_RXON_CTX_BSS)) |
b3c2ce13 EG |
1159 | queue_to_fifo = iwlagn_ipan_queue_to_tx_fifo; |
1160 | else | |
1161 | queue_to_fifo = iwlagn_default_queue_to_tx_fifo; | |
1162 | ||
6d8f6eeb | 1163 | iwl_trans_set_wr_ptrs(trans, trans->shrd->cmd_queue, 0); |
b3c2ce13 EG |
1164 | |
1165 | /* make sure all queue are not stopped */ | |
8ad71bef EG |
1166 | memset(&trans_pcie->queue_stopped[0], 0, |
1167 | sizeof(trans_pcie->queue_stopped)); | |
b3c2ce13 | 1168 | for (i = 0; i < 4; i++) |
8ad71bef | 1169 | atomic_set(&trans_pcie->queue_stop_count[i], 0); |
b3c2ce13 EG |
1170 | |
1171 | /* reset to 0 to enable all the queue first */ | |
8ad71bef | 1172 | trans_pcie->txq_ctx_active_msk = 0; |
b3c2ce13 | 1173 | |
effcea16 | 1174 | BUILD_BUG_ON(ARRAY_SIZE(iwlagn_default_queue_to_tx_fifo) < |
72c04ce0 | 1175 | IWLAGN_FIRST_AMPDU_QUEUE); |
effcea16 | 1176 | BUILD_BUG_ON(ARRAY_SIZE(iwlagn_ipan_queue_to_tx_fifo) < |
72c04ce0 | 1177 | IWLAGN_FIRST_AMPDU_QUEUE); |
b3c2ce13 | 1178 | |
72c04ce0 | 1179 | for (i = 0; i < IWLAGN_FIRST_AMPDU_QUEUE; i++) { |
b3c2ce13 EG |
1180 | int fifo = queue_to_fifo[i].fifo; |
1181 | int ac = queue_to_fifo[i].ac; | |
1182 | ||
8ad71bef | 1183 | iwl_txq_ctx_activate(trans_pcie, i); |
b3c2ce13 EG |
1184 | |
1185 | if (fifo == IWL_TX_FIFO_UNUSED) | |
1186 | continue; | |
1187 | ||
1188 | if (ac != IWL_AC_UNSET) | |
8ad71bef EG |
1189 | iwl_set_swq_id(&trans_pcie->txq[i], ac, i); |
1190 | iwl_trans_tx_queue_set_status(trans, &trans_pcie->txq[i], | |
1191 | fifo, 0); | |
b3c2ce13 EG |
1192 | } |
1193 | ||
6d8f6eeb | 1194 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
b3c2ce13 EG |
1195 | |
1196 | /* Enable L1-Active */ | |
1042db2a | 1197 | iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG, |
b3c2ce13 EG |
1198 | APMG_PCIDEV_STT_VAL_L1_ACT_DIS); |
1199 | } | |
1200 | ||
ed6a3803 EG |
1201 | static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans) |
1202 | { | |
1203 | iwl_reset_ict(trans); | |
1204 | iwl_tx_start(trans); | |
1205 | } | |
1206 | ||
c170b867 EG |
1207 | /** |
1208 | * iwlagn_txq_ctx_stop - Stop all Tx DMA channels | |
1209 | */ | |
6d8f6eeb | 1210 | static int iwl_trans_tx_stop(struct iwl_trans *trans) |
c170b867 EG |
1211 | { |
1212 | int ch, txq_id; | |
1213 | unsigned long flags; | |
8ad71bef | 1214 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
c170b867 EG |
1215 | |
1216 | /* Turn off all Tx DMA fifos */ | |
6d8f6eeb | 1217 | spin_lock_irqsave(&trans->shrd->lock, flags); |
c170b867 | 1218 | |
6d8f6eeb | 1219 | iwl_trans_txq_set_sched(trans, 0); |
c170b867 EG |
1220 | |
1221 | /* Stop each Tx DMA channel, and wait for it to be idle */ | |
02f6f659 | 1222 | for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) { |
1042db2a | 1223 | iwl_write_direct32(trans, |
6d8f6eeb | 1224 | FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); |
1042db2a | 1225 | if (iwl_poll_direct_bit(trans, FH_TSSR_TX_STATUS_REG, |
c170b867 EG |
1226 | FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), |
1227 | 1000)) | |
6d8f6eeb | 1228 | IWL_ERR(trans, "Failing on timeout while stopping" |
c170b867 | 1229 | " DMA channel %d [0x%08x]", ch, |
1042db2a | 1230 | iwl_read_direct32(trans, |
6d8f6eeb | 1231 | FH_TSSR_TX_STATUS_REG)); |
c170b867 | 1232 | } |
6d8f6eeb | 1233 | spin_unlock_irqrestore(&trans->shrd->lock, flags); |
c170b867 | 1234 | |
8ad71bef | 1235 | if (!trans_pcie->txq) { |
6d8f6eeb | 1236 | IWL_WARN(trans, "Stopping tx queues that aren't allocated..."); |
c170b867 EG |
1237 | return 0; |
1238 | } | |
1239 | ||
1240 | /* Unmap DMA from host system and free skb's */ | |
6d8f6eeb EG |
1241 | for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) |
1242 | iwl_tx_queue_unmap(trans, txq_id); | |
c170b867 EG |
1243 | |
1244 | return 0; | |
1245 | } | |
1246 | ||
43e58856 | 1247 | static void iwl_trans_pcie_stop_device(struct iwl_trans *trans) |
ae2c30bf EG |
1248 | { |
1249 | unsigned long flags; | |
43e58856 | 1250 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
ae2c30bf | 1251 | |
43e58856 | 1252 | /* tell the device to stop sending interrupts */ |
ae2c30bf EG |
1253 | spin_lock_irqsave(&trans->shrd->lock, flags); |
1254 | iwl_disable_interrupts(trans); | |
1255 | spin_unlock_irqrestore(&trans->shrd->lock, flags); | |
1256 | ||
ab6cf8e8 | 1257 | /* device going down, Stop using ICT table */ |
6d8f6eeb | 1258 | iwl_disable_ict(trans); |
ab6cf8e8 EG |
1259 | |
1260 | /* | |
1261 | * If a HW restart happens during firmware loading, | |
1262 | * then the firmware loading might call this function | |
1263 | * and later it might be called again due to the | |
1264 | * restart. So don't process again if the device is | |
1265 | * already dead. | |
1266 | */ | |
6d8f6eeb EG |
1267 | if (test_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status)) { |
1268 | iwl_trans_tx_stop(trans); | |
a5916977 | 1269 | #ifndef CONFIG_IWLWIFI_IDI |
6d8f6eeb | 1270 | iwl_trans_rx_stop(trans); |
a5916977 | 1271 | #endif |
ab6cf8e8 | 1272 | /* Power-down device's busmaster DMA clocks */ |
1042db2a | 1273 | iwl_write_prph(trans, APMG_CLK_DIS_REG, |
ab6cf8e8 EG |
1274 | APMG_CLK_VAL_DMA_CLK_RQT); |
1275 | udelay(5); | |
1276 | } | |
1277 | ||
1278 | /* Make sure (redundant) we've released our request to stay awake */ | |
1042db2a | 1279 | iwl_clear_bit(trans, CSR_GP_CNTRL, |
6d8f6eeb | 1280 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
ab6cf8e8 EG |
1281 | |
1282 | /* Stop the device, and put it in low power state */ | |
cc56feb2 | 1283 | iwl_apm_stop(trans); |
43e58856 EG |
1284 | |
1285 | /* Upon stop, the APM issues an interrupt if HW RF kill is set. | |
1286 | * Clean again the interrupt here | |
1287 | */ | |
1288 | spin_lock_irqsave(&trans->shrd->lock, flags); | |
1289 | iwl_disable_interrupts(trans); | |
1290 | spin_unlock_irqrestore(&trans->shrd->lock, flags); | |
1291 | ||
1292 | /* wait to make sure we flush pending tasklet*/ | |
a42a1844 | 1293 | synchronize_irq(trans->irq); |
43e58856 EG |
1294 | tasklet_kill(&trans_pcie->irq_tasklet); |
1295 | ||
1296 | /* stop and reset the on-board processor */ | |
1042db2a | 1297 | iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); |
ab6cf8e8 EG |
1298 | } |
1299 | ||
e13c0c59 | 1300 | static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, |
14991a9d | 1301 | struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx, |
34b5321e | 1302 | u8 sta_id, u8 tid) |
47c1b496 | 1303 | { |
e13c0c59 EG |
1304 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
1305 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1306 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
132f98c2 | 1307 | struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; |
47c1b496 | 1308 | struct iwl_cmd_meta *out_meta; |
e13c0c59 EG |
1309 | struct iwl_tx_queue *txq; |
1310 | struct iwl_queue *q; | |
47c1b496 EG |
1311 | |
1312 | dma_addr_t phys_addr = 0; | |
1313 | dma_addr_t txcmd_phys; | |
1314 | dma_addr_t scratch_phys; | |
1315 | u16 len, firstlen, secondlen; | |
1316 | u8 wait_write_ptr = 0; | |
e13c0c59 | 1317 | u8 txq_id; |
e13c0c59 EG |
1318 | bool is_agg = false; |
1319 | __le16 fc = hdr->frame_control; | |
47c1b496 | 1320 | u8 hdr_len = ieee80211_hdrlen(fc); |
631b84c5 | 1321 | u16 __maybe_unused wifi_seq; |
47c1b496 | 1322 | |
e13c0c59 EG |
1323 | /* |
1324 | * Send this frame after DTIM -- there's a special queue | |
1325 | * reserved for this for contexts that support AP mode. | |
1326 | */ | |
1327 | if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { | |
1328 | txq_id = trans_pcie->mcast_queue[ctx]; | |
1329 | ||
1330 | /* | |
1331 | * The microcode will clear the more data | |
1332 | * bit in the last frame it transmits. | |
1333 | */ | |
1334 | hdr->frame_control |= | |
1335 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1336 | } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) | |
1337 | txq_id = IWL_AUX_QUEUE; | |
1338 | else | |
1339 | txq_id = | |
1340 | trans_pcie->ac_to_queue[ctx][skb_get_queue_mapping(skb)]; | |
1341 | ||
97756fb1 EG |
1342 | /* aggregation is on for this <sta,tid> */ |
1343 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { | |
1344 | WARN_ON(tid >= IWL_MAX_TID_COUNT); | |
1345 | txq_id = trans_pcie->agg_txq[sta_id][tid]; | |
1346 | is_agg = true; | |
e13c0c59 EG |
1347 | } |
1348 | ||
8ad71bef | 1349 | txq = &trans_pcie->txq[txq_id]; |
e13c0c59 EG |
1350 | q = &txq->q; |
1351 | ||
631b84c5 EG |
1352 | /* In AGG mode, the index in the ring must correspond to the WiFi |
1353 | * sequence number. This is a HW requirements to help the SCD to parse | |
1354 | * the BA. | |
1355 | * Check here that the packets are in the right place on the ring. | |
1356 | */ | |
1357 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1358 | wifi_seq = SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); | |
1359 | WARN_ONCE(is_agg && ((wifi_seq & 0xff) != q->write_ptr), | |
1360 | "Q: %d WiFi Seq %d tfdNum %d", | |
1361 | txq_id, wifi_seq, q->write_ptr); | |
1362 | #endif | |
1363 | ||
47c1b496 | 1364 | /* Set up driver data for this TFD */ |
2c452297 | 1365 | txq->skbs[q->write_ptr] = skb; |
dfa2bdba EG |
1366 | txq->cmd[q->write_ptr] = dev_cmd; |
1367 | ||
1368 | dev_cmd->hdr.cmd = REPLY_TX; | |
1369 | dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | | |
1370 | INDEX_TO_SEQ(q->write_ptr))); | |
47c1b496 EG |
1371 | |
1372 | /* Set up first empty entry in queue's array of Tx/cmd buffers */ | |
1373 | out_meta = &txq->meta[q->write_ptr]; | |
1374 | ||
1375 | /* | |
1376 | * Use the first empty entry in this queue's command buffer array | |
1377 | * to contain the Tx command and MAC header concatenated together | |
1378 | * (payload data will be in another buffer). | |
1379 | * Size of this varies, due to varying MAC header length. | |
1380 | * If end is not dword aligned, we'll have 2 extra bytes at the end | |
1381 | * of the MAC header (device reads on dword boundaries). | |
1382 | * We'll tell device about this padding later. | |
1383 | */ | |
1384 | len = sizeof(struct iwl_tx_cmd) + | |
1385 | sizeof(struct iwl_cmd_header) + hdr_len; | |
1386 | firstlen = (len + 3) & ~3; | |
1387 | ||
1388 | /* Tell NIC about any 2-byte padding after MAC header */ | |
1389 | if (firstlen != len) | |
1390 | tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK; | |
1391 | ||
1392 | /* Physical address of this Tx command's header (not MAC header!), | |
1393 | * within command buffer array. */ | |
1042db2a | 1394 | txcmd_phys = dma_map_single(trans->dev, |
47c1b496 EG |
1395 | &dev_cmd->hdr, firstlen, |
1396 | DMA_BIDIRECTIONAL); | |
1042db2a | 1397 | if (unlikely(dma_mapping_error(trans->dev, txcmd_phys))) |
47c1b496 EG |
1398 | return -1; |
1399 | dma_unmap_addr_set(out_meta, mapping, txcmd_phys); | |
1400 | dma_unmap_len_set(out_meta, len, firstlen); | |
1401 | ||
1402 | if (!ieee80211_has_morefrags(fc)) { | |
1403 | txq->need_update = 1; | |
1404 | } else { | |
1405 | wait_write_ptr = 1; | |
1406 | txq->need_update = 0; | |
1407 | } | |
1408 | ||
1409 | /* Set up TFD's 2nd entry to point directly to remainder of skb, | |
1410 | * if any (802.11 null frames have no payload). */ | |
1411 | secondlen = skb->len - hdr_len; | |
1412 | if (secondlen > 0) { | |
1042db2a | 1413 | phys_addr = dma_map_single(trans->dev, skb->data + hdr_len, |
47c1b496 | 1414 | secondlen, DMA_TO_DEVICE); |
1042db2a EG |
1415 | if (unlikely(dma_mapping_error(trans->dev, phys_addr))) { |
1416 | dma_unmap_single(trans->dev, | |
47c1b496 EG |
1417 | dma_unmap_addr(out_meta, mapping), |
1418 | dma_unmap_len(out_meta, len), | |
1419 | DMA_BIDIRECTIONAL); | |
1420 | return -1; | |
1421 | } | |
1422 | } | |
1423 | ||
1424 | /* Attach buffers to TFD */ | |
e13c0c59 | 1425 | iwlagn_txq_attach_buf_to_tfd(trans, txq, txcmd_phys, firstlen, 1); |
47c1b496 | 1426 | if (secondlen > 0) |
e13c0c59 | 1427 | iwlagn_txq_attach_buf_to_tfd(trans, txq, phys_addr, |
47c1b496 EG |
1428 | secondlen, 0); |
1429 | ||
1430 | scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) + | |
1431 | offsetof(struct iwl_tx_cmd, scratch); | |
1432 | ||
1433 | /* take back ownership of DMA buffer to enable update */ | |
1042db2a | 1434 | dma_sync_single_for_cpu(trans->dev, txcmd_phys, firstlen, |
47c1b496 EG |
1435 | DMA_BIDIRECTIONAL); |
1436 | tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys); | |
1437 | tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys); | |
1438 | ||
e13c0c59 | 1439 | IWL_DEBUG_TX(trans, "sequence nr = 0X%x\n", |
47c1b496 | 1440 | le16_to_cpu(dev_cmd->hdr.sequence)); |
e13c0c59 EG |
1441 | IWL_DEBUG_TX(trans, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags)); |
1442 | iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd)); | |
1443 | iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len); | |
47c1b496 EG |
1444 | |
1445 | /* Set up entry for this TFD in Tx byte-count array */ | |
96f1f05a | 1446 | iwl_trans_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len)); |
47c1b496 | 1447 | |
1042db2a | 1448 | dma_sync_single_for_device(trans->dev, txcmd_phys, firstlen, |
47c1b496 EG |
1449 | DMA_BIDIRECTIONAL); |
1450 | ||
e13c0c59 | 1451 | trace_iwlwifi_dev_tx(priv(trans), |
47c1b496 EG |
1452 | &((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr], |
1453 | sizeof(struct iwl_tfd), | |
1454 | &dev_cmd->hdr, firstlen, | |
1455 | skb->data + hdr_len, secondlen); | |
1456 | ||
1457 | /* Tell device the write index *just past* this latest filled TFD */ | |
1458 | q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); | |
e13c0c59 EG |
1459 | iwl_txq_update_write_ptr(trans, txq); |
1460 | ||
47c1b496 EG |
1461 | /* |
1462 | * At this point the frame is "transmitted" successfully | |
1463 | * and we will get a TX status notification eventually, | |
1464 | * regardless of the value of ret. "ret" only indicates | |
1465 | * whether or not we should update the write pointer. | |
1466 | */ | |
a0eaad71 | 1467 | if (iwl_queue_space(q) < q->high_mark) { |
47c1b496 EG |
1468 | if (wait_write_ptr) { |
1469 | txq->need_update = 1; | |
e13c0c59 | 1470 | iwl_txq_update_write_ptr(trans, txq); |
47c1b496 | 1471 | } else { |
81a3de1c | 1472 | iwl_stop_queue(trans, txq, "Queue is full"); |
47c1b496 EG |
1473 | } |
1474 | } | |
1475 | return 0; | |
1476 | } | |
1477 | ||
57a1dc89 | 1478 | static int iwl_trans_pcie_start_hw(struct iwl_trans *trans) |
e6bb4c9c | 1479 | { |
5a878bf6 EG |
1480 | struct iwl_trans_pcie *trans_pcie = |
1481 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
e6bb4c9c EG |
1482 | int err; |
1483 | ||
0c325769 EG |
1484 | trans_pcie->inta_mask = CSR_INI_SET_MASK; |
1485 | ||
57a1dc89 EG |
1486 | if (!trans_pcie->irq_requested) { |
1487 | tasklet_init(&trans_pcie->irq_tasklet, (void (*)(unsigned long)) | |
1488 | iwl_irq_tasklet, (unsigned long)trans); | |
e6bb4c9c | 1489 | |
57a1dc89 | 1490 | iwl_alloc_isr_ict(trans); |
e6bb4c9c | 1491 | |
57a1dc89 EG |
1492 | err = request_irq(trans->irq, iwl_isr_ict, IRQF_SHARED, |
1493 | DRV_NAME, trans); | |
1494 | if (err) { | |
1495 | IWL_ERR(trans, "Error allocating IRQ %d\n", | |
1496 | trans->irq); | |
ebb7678d | 1497 | goto error; |
57a1dc89 EG |
1498 | } |
1499 | ||
1500 | INIT_WORK(&trans_pcie->rx_replenish, iwl_bg_rx_replenish); | |
1501 | trans_pcie->irq_requested = true; | |
e6bb4c9c EG |
1502 | } |
1503 | ||
ebb7678d EG |
1504 | err = iwl_prepare_card_hw(trans); |
1505 | if (err) { | |
1506 | IWL_ERR(trans, "Error while preparing HW: %d", err); | |
f057ac4e | 1507 | goto err_free_irq; |
ebb7678d | 1508 | } |
a6c684ee EG |
1509 | |
1510 | iwl_apm_init(trans); | |
1511 | ||
d48e2074 EG |
1512 | /* If platform's RF_KILL switch is NOT set to KILL */ |
1513 | if (iwl_read32(trans, | |
1514 | CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) | |
1515 | clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status); | |
1516 | else | |
1517 | set_bit(STATUS_RF_KILL_HW, &trans->shrd->status); | |
1518 | ||
1519 | iwl_set_hw_rfkill_state(priv(trans), | |
1520 | test_bit(STATUS_RF_KILL_HW, | |
1521 | &trans->shrd->status)); | |
1522 | ||
ebb7678d EG |
1523 | return err; |
1524 | ||
f057ac4e JB |
1525 | err_free_irq: |
1526 | free_irq(trans->irq, trans); | |
ebb7678d EG |
1527 | error: |
1528 | iwl_free_isr_ict(trans); | |
1529 | tasklet_kill(&trans_pcie->irq_tasklet); | |
1530 | return err; | |
e6bb4c9c EG |
1531 | } |
1532 | ||
cc56feb2 EG |
1533 | static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans) |
1534 | { | |
1535 | iwl_apm_stop(trans); | |
1536 | ||
1df06bdc EG |
1537 | iwl_write32(trans, CSR_INT, 0xFFFFFFFF); |
1538 | ||
cc56feb2 EG |
1539 | /* Even if we stop the HW, we still want the RF kill interrupt */ |
1540 | IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n"); | |
1541 | iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL); | |
1542 | } | |
1543 | ||
76bc10fc | 1544 | static int iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid, |
464021ff EG |
1545 | int txq_id, int ssn, u32 status, |
1546 | struct sk_buff_head *skbs) | |
1547 | { | |
8ad71bef EG |
1548 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
1549 | struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id]; | |
a0eaad71 EG |
1550 | /* n_bd is usually 256 => n_bd - 1 = 0xff */ |
1551 | int tfd_num = ssn & (txq->q.n_bd - 1); | |
464021ff | 1552 | int freed = 0; |
a0eaad71 | 1553 | |
8ad71bef EG |
1554 | txq->time_stamp = jiffies; |
1555 | ||
76bc10fc | 1556 | if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE && |
3d29dd9b | 1557 | tid != IWL_TID_NON_QOS && |
76bc10fc EG |
1558 | txq_id != trans_pcie->agg_txq[sta_id][tid])) { |
1559 | /* | |
1560 | * FIXME: this is a uCode bug which need to be addressed, | |
1561 | * log the information and return for now. | |
1562 | * Since it is can possibly happen very often and in order | |
1563 | * not to fill the syslog, don't use IWL_ERR or IWL_WARN | |
1564 | */ | |
1565 | IWL_DEBUG_TX_QUEUES(trans, "Bad queue mapping txq_id %d, " | |
1566 | "agg_txq[sta_id[tid] %d", txq_id, | |
1567 | trans_pcie->agg_txq[sta_id][tid]); | |
1568 | return 1; | |
a0eaad71 EG |
1569 | } |
1570 | ||
1571 | if (txq->q.read_ptr != tfd_num) { | |
1daf04b8 EG |
1572 | IWL_DEBUG_TX_REPLY(trans, "[Q %d | AC %d] %d -> %d (%d)\n", |
1573 | txq_id, iwl_get_queue_ac(txq), txq->q.read_ptr, | |
1574 | tfd_num, ssn); | |
464021ff | 1575 | freed = iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs); |
1ba42da4 EG |
1576 | if (iwl_queue_space(&txq->q) > txq->q.low_mark && |
1577 | (!txq->sched_retry || | |
1578 | status != TX_STATUS_FAIL_PASSIVE_NO_RX)) | |
81a3de1c | 1579 | iwl_wake_queue(trans, txq, "Packets reclaimed"); |
a0eaad71 | 1580 | } |
76bc10fc | 1581 | return 0; |
a0eaad71 EG |
1582 | } |
1583 | ||
03905495 EG |
1584 | static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val) |
1585 | { | |
1586 | iowrite8(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); | |
1587 | } | |
1588 | ||
1589 | static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val) | |
1590 | { | |
1591 | iowrite32(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); | |
1592 | } | |
1593 | ||
1594 | static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs) | |
1595 | { | |
1596 | u32 val = ioread32(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); | |
1597 | return val; | |
1598 | } | |
1599 | ||
6d8f6eeb | 1600 | static void iwl_trans_pcie_free(struct iwl_trans *trans) |
34c1b7ba | 1601 | { |
a42a1844 EG |
1602 | struct iwl_trans_pcie *trans_pcie = |
1603 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
1604 | ||
45c30dba | 1605 | iwl_calib_free_results(trans); |
ae2c30bf | 1606 | iwl_trans_pcie_tx_free(trans); |
a5916977 | 1607 | #ifndef CONFIG_IWLWIFI_IDI |
ae2c30bf | 1608 | iwl_trans_pcie_rx_free(trans); |
a5916977 | 1609 | #endif |
57a1dc89 EG |
1610 | if (trans_pcie->irq_requested == true) { |
1611 | free_irq(trans->irq, trans); | |
1612 | iwl_free_isr_ict(trans); | |
1613 | } | |
a42a1844 EG |
1614 | |
1615 | pci_disable_msi(trans_pcie->pci_dev); | |
1616 | pci_iounmap(trans_pcie->pci_dev, trans_pcie->hw_base); | |
1617 | pci_release_regions(trans_pcie->pci_dev); | |
1618 | pci_disable_device(trans_pcie->pci_dev); | |
1619 | ||
6d8f6eeb EG |
1620 | trans->shrd->trans = NULL; |
1621 | kfree(trans); | |
34c1b7ba EG |
1622 | } |
1623 | ||
c01a4047 | 1624 | #ifdef CONFIG_PM_SLEEP |
57210f7c EG |
1625 | static int iwl_trans_pcie_suspend(struct iwl_trans *trans) |
1626 | { | |
1627 | /* | |
1628 | * This function is called when system goes into suspend state | |
ade4c649 WYG |
1629 | * mac80211 will call iwlagn_mac_stop() from the mac80211 suspend |
1630 | * function first but since iwlagn_mac_stop() has no knowledge of | |
1631 | * who the caller is, | |
57210f7c EG |
1632 | * it will not call apm_ops.stop() to stop the DMA operation. |
1633 | * Calling apm_ops.stop here to make sure we stop the DMA. | |
1634 | * | |
1635 | * But of course ... if we have configured WoWLAN then we did other | |
1636 | * things already :-) | |
1637 | */ | |
d36120c6 | 1638 | if (!trans->shrd->wowlan) { |
cc56feb2 | 1639 | iwl_apm_stop(trans); |
d36120c6 JB |
1640 | } else { |
1641 | iwl_disable_interrupts(trans); | |
1042db2a | 1642 | iwl_clear_bit(trans, CSR_GP_CNTRL, |
d36120c6 JB |
1643 | CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); |
1644 | } | |
57210f7c EG |
1645 | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | static int iwl_trans_pcie_resume(struct iwl_trans *trans) | |
1650 | { | |
1651 | bool hw_rfkill = false; | |
1652 | ||
0c325769 | 1653 | iwl_enable_interrupts(trans); |
57210f7c | 1654 | |
1042db2a | 1655 | if (!(iwl_read32(trans, CSR_GP_CNTRL) & |
57210f7c EG |
1656 | CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) |
1657 | hw_rfkill = true; | |
1658 | ||
1659 | if (hw_rfkill) | |
1660 | set_bit(STATUS_RF_KILL_HW, &trans->shrd->status); | |
1661 | else | |
1662 | clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status); | |
1663 | ||
3e10caeb | 1664 | iwl_set_hw_rfkill_state(priv(trans), hw_rfkill); |
57210f7c EG |
1665 | |
1666 | return 0; | |
1667 | } | |
c01a4047 | 1668 | #endif /* CONFIG_PM_SLEEP */ |
57210f7c | 1669 | |
e13c0c59 | 1670 | static void iwl_trans_pcie_wake_any_queue(struct iwl_trans *trans, |
81a3de1c EG |
1671 | enum iwl_rxon_context_id ctx, |
1672 | const char *msg) | |
e13c0c59 EG |
1673 | { |
1674 | u8 ac, txq_id; | |
1675 | struct iwl_trans_pcie *trans_pcie = | |
1676 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
1677 | ||
1678 | for (ac = 0; ac < AC_NUM; ac++) { | |
1679 | txq_id = trans_pcie->ac_to_queue[ctx][ac]; | |
81a3de1c | 1680 | IWL_DEBUG_TX_QUEUES(trans, "Queue Status: Q[%d] %s\n", |
e13c0c59 | 1681 | ac, |
8ad71bef | 1682 | (atomic_read(&trans_pcie->queue_stop_count[ac]) > 0) |
e13c0c59 | 1683 | ? "stopped" : "awake"); |
81a3de1c | 1684 | iwl_wake_queue(trans, &trans_pcie->txq[txq_id], msg); |
e13c0c59 EG |
1685 | } |
1686 | } | |
1687 | ||
81a3de1c EG |
1688 | static void iwl_trans_pcie_stop_queue(struct iwl_trans *trans, int txq_id, |
1689 | const char *msg) | |
e20d4341 | 1690 | { |
8ad71bef EG |
1691 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
1692 | ||
81a3de1c | 1693 | iwl_stop_queue(trans, &trans_pcie->txq[txq_id], msg); |
e20d4341 EG |
1694 | } |
1695 | ||
5f178cd2 EG |
1696 | #define IWL_FLUSH_WAIT_MS 2000 |
1697 | ||
1698 | static int iwl_trans_pcie_wait_tx_queue_empty(struct iwl_trans *trans) | |
1699 | { | |
8ad71bef | 1700 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
5f178cd2 EG |
1701 | struct iwl_tx_queue *txq; |
1702 | struct iwl_queue *q; | |
1703 | int cnt; | |
1704 | unsigned long now = jiffies; | |
1705 | int ret = 0; | |
1706 | ||
1707 | /* waiting for all the tx frames complete might take a while */ | |
1708 | for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) { | |
1709 | if (cnt == trans->shrd->cmd_queue) | |
1710 | continue; | |
8ad71bef | 1711 | txq = &trans_pcie->txq[cnt]; |
5f178cd2 EG |
1712 | q = &txq->q; |
1713 | while (q->read_ptr != q->write_ptr && !time_after(jiffies, | |
1714 | now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) | |
1715 | msleep(1); | |
1716 | ||
1717 | if (q->read_ptr != q->write_ptr) { | |
1718 | IWL_ERR(trans, "fail to flush all tx fifo queues\n"); | |
1719 | ret = -ETIMEDOUT; | |
1720 | break; | |
1721 | } | |
1722 | } | |
1723 | return ret; | |
1724 | } | |
1725 | ||
f22be624 EG |
1726 | /* |
1727 | * On every watchdog tick we check (latest) time stamp. If it does not | |
1728 | * change during timeout period and queue is not empty we reset firmware. | |
1729 | */ | |
1730 | static int iwl_trans_pcie_check_stuck_queue(struct iwl_trans *trans, int cnt) | |
1731 | { | |
8ad71bef EG |
1732 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
1733 | struct iwl_tx_queue *txq = &trans_pcie->txq[cnt]; | |
f22be624 EG |
1734 | struct iwl_queue *q = &txq->q; |
1735 | unsigned long timeout; | |
1736 | ||
1737 | if (q->read_ptr == q->write_ptr) { | |
1738 | txq->time_stamp = jiffies; | |
1739 | return 0; | |
1740 | } | |
1741 | ||
1742 | timeout = txq->time_stamp + | |
1743 | msecs_to_jiffies(hw_params(trans).wd_timeout); | |
1744 | ||
1745 | if (time_after(jiffies, timeout)) { | |
1746 | IWL_ERR(trans, "Queue %d stuck for %u ms.\n", q->id, | |
1747 | hw_params(trans).wd_timeout); | |
08d1700d | 1748 | IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n", |
05f8a09f | 1749 | q->read_ptr, q->write_ptr); |
08d1700d | 1750 | IWL_ERR(trans, "Current HW read_ptr %d write_ptr %d\n", |
1042db2a | 1751 | iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt)) |
08d1700d | 1752 | & (TFD_QUEUE_SIZE_MAX - 1), |
1042db2a | 1753 | iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt))); |
f22be624 EG |
1754 | return 1; |
1755 | } | |
1756 | ||
1757 | return 0; | |
1758 | } | |
1759 | ||
ff620849 EG |
1760 | static const char *get_fh_string(int cmd) |
1761 | { | |
1762 | switch (cmd) { | |
1763 | IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); | |
1764 | IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); | |
1765 | IWL_CMD(FH_RSCSR_CHNL0_WPTR); | |
1766 | IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); | |
1767 | IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); | |
1768 | IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); | |
1769 | IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); | |
1770 | IWL_CMD(FH_TSSR_TX_STATUS_REG); | |
1771 | IWL_CMD(FH_TSSR_TX_ERROR_REG); | |
1772 | default: | |
1773 | return "UNKNOWN"; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | int iwl_dump_fh(struct iwl_trans *trans, char **buf, bool display) | |
1778 | { | |
1779 | int i; | |
1780 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1781 | int pos = 0; | |
1782 | size_t bufsz = 0; | |
1783 | #endif | |
1784 | static const u32 fh_tbl[] = { | |
1785 | FH_RSCSR_CHNL0_STTS_WPTR_REG, | |
1786 | FH_RSCSR_CHNL0_RBDCB_BASE_REG, | |
1787 | FH_RSCSR_CHNL0_WPTR, | |
1788 | FH_MEM_RCSR_CHNL0_CONFIG_REG, | |
1789 | FH_MEM_RSSR_SHARED_CTRL_REG, | |
1790 | FH_MEM_RSSR_RX_STATUS_REG, | |
1791 | FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, | |
1792 | FH_TSSR_TX_STATUS_REG, | |
1793 | FH_TSSR_TX_ERROR_REG | |
1794 | }; | |
1795 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1796 | if (display) { | |
1797 | bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; | |
1798 | *buf = kmalloc(bufsz, GFP_KERNEL); | |
1799 | if (!*buf) | |
1800 | return -ENOMEM; | |
1801 | pos += scnprintf(*buf + pos, bufsz - pos, | |
1802 | "FH register values:\n"); | |
1803 | for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { | |
1804 | pos += scnprintf(*buf + pos, bufsz - pos, | |
1805 | " %34s: 0X%08x\n", | |
1806 | get_fh_string(fh_tbl[i]), | |
1042db2a | 1807 | iwl_read_direct32(trans, fh_tbl[i])); |
ff620849 EG |
1808 | } |
1809 | return pos; | |
1810 | } | |
1811 | #endif | |
1812 | IWL_ERR(trans, "FH register values:\n"); | |
1813 | for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { | |
1814 | IWL_ERR(trans, " %34s: 0X%08x\n", | |
1815 | get_fh_string(fh_tbl[i]), | |
1042db2a | 1816 | iwl_read_direct32(trans, fh_tbl[i])); |
ff620849 EG |
1817 | } |
1818 | return 0; | |
1819 | } | |
1820 | ||
1821 | static const char *get_csr_string(int cmd) | |
1822 | { | |
1823 | switch (cmd) { | |
1824 | IWL_CMD(CSR_HW_IF_CONFIG_REG); | |
1825 | IWL_CMD(CSR_INT_COALESCING); | |
1826 | IWL_CMD(CSR_INT); | |
1827 | IWL_CMD(CSR_INT_MASK); | |
1828 | IWL_CMD(CSR_FH_INT_STATUS); | |
1829 | IWL_CMD(CSR_GPIO_IN); | |
1830 | IWL_CMD(CSR_RESET); | |
1831 | IWL_CMD(CSR_GP_CNTRL); | |
1832 | IWL_CMD(CSR_HW_REV); | |
1833 | IWL_CMD(CSR_EEPROM_REG); | |
1834 | IWL_CMD(CSR_EEPROM_GP); | |
1835 | IWL_CMD(CSR_OTP_GP_REG); | |
1836 | IWL_CMD(CSR_GIO_REG); | |
1837 | IWL_CMD(CSR_GP_UCODE_REG); | |
1838 | IWL_CMD(CSR_GP_DRIVER_REG); | |
1839 | IWL_CMD(CSR_UCODE_DRV_GP1); | |
1840 | IWL_CMD(CSR_UCODE_DRV_GP2); | |
1841 | IWL_CMD(CSR_LED_REG); | |
1842 | IWL_CMD(CSR_DRAM_INT_TBL_REG); | |
1843 | IWL_CMD(CSR_GIO_CHICKEN_BITS); | |
1844 | IWL_CMD(CSR_ANA_PLL_CFG); | |
1845 | IWL_CMD(CSR_HW_REV_WA_REG); | |
1846 | IWL_CMD(CSR_DBG_HPET_MEM_REG); | |
1847 | default: | |
1848 | return "UNKNOWN"; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | void iwl_dump_csr(struct iwl_trans *trans) | |
1853 | { | |
1854 | int i; | |
1855 | static const u32 csr_tbl[] = { | |
1856 | CSR_HW_IF_CONFIG_REG, | |
1857 | CSR_INT_COALESCING, | |
1858 | CSR_INT, | |
1859 | CSR_INT_MASK, | |
1860 | CSR_FH_INT_STATUS, | |
1861 | CSR_GPIO_IN, | |
1862 | CSR_RESET, | |
1863 | CSR_GP_CNTRL, | |
1864 | CSR_HW_REV, | |
1865 | CSR_EEPROM_REG, | |
1866 | CSR_EEPROM_GP, | |
1867 | CSR_OTP_GP_REG, | |
1868 | CSR_GIO_REG, | |
1869 | CSR_GP_UCODE_REG, | |
1870 | CSR_GP_DRIVER_REG, | |
1871 | CSR_UCODE_DRV_GP1, | |
1872 | CSR_UCODE_DRV_GP2, | |
1873 | CSR_LED_REG, | |
1874 | CSR_DRAM_INT_TBL_REG, | |
1875 | CSR_GIO_CHICKEN_BITS, | |
1876 | CSR_ANA_PLL_CFG, | |
1877 | CSR_HW_REV_WA_REG, | |
1878 | CSR_DBG_HPET_MEM_REG | |
1879 | }; | |
1880 | IWL_ERR(trans, "CSR values:\n"); | |
1881 | IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is " | |
1882 | "CSR_INT_PERIODIC_REG)\n"); | |
1883 | for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) { | |
1884 | IWL_ERR(trans, " %25s: 0X%08x\n", | |
1885 | get_csr_string(csr_tbl[i]), | |
1042db2a | 1886 | iwl_read32(trans, csr_tbl[i])); |
ff620849 EG |
1887 | } |
1888 | } | |
1889 | ||
87e5666c EG |
1890 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
1891 | /* create and remove of files */ | |
1892 | #define DEBUGFS_ADD_FILE(name, parent, mode) do { \ | |
5a878bf6 | 1893 | if (!debugfs_create_file(#name, mode, parent, trans, \ |
87e5666c EG |
1894 | &iwl_dbgfs_##name##_ops)) \ |
1895 | return -ENOMEM; \ | |
1896 | } while (0) | |
1897 | ||
1898 | /* file operation */ | |
1899 | #define DEBUGFS_READ_FUNC(name) \ | |
1900 | static ssize_t iwl_dbgfs_##name##_read(struct file *file, \ | |
1901 | char __user *user_buf, \ | |
1902 | size_t count, loff_t *ppos); | |
1903 | ||
1904 | #define DEBUGFS_WRITE_FUNC(name) \ | |
1905 | static ssize_t iwl_dbgfs_##name##_write(struct file *file, \ | |
1906 | const char __user *user_buf, \ | |
1907 | size_t count, loff_t *ppos); | |
1908 | ||
1909 | ||
1910 | static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file) | |
1911 | { | |
1912 | file->private_data = inode->i_private; | |
1913 | return 0; | |
1914 | } | |
1915 | ||
1916 | #define DEBUGFS_READ_FILE_OPS(name) \ | |
1917 | DEBUGFS_READ_FUNC(name); \ | |
1918 | static const struct file_operations iwl_dbgfs_##name##_ops = { \ | |
1919 | .read = iwl_dbgfs_##name##_read, \ | |
1920 | .open = iwl_dbgfs_open_file_generic, \ | |
1921 | .llseek = generic_file_llseek, \ | |
1922 | }; | |
1923 | ||
16db88ba EG |
1924 | #define DEBUGFS_WRITE_FILE_OPS(name) \ |
1925 | DEBUGFS_WRITE_FUNC(name); \ | |
1926 | static const struct file_operations iwl_dbgfs_##name##_ops = { \ | |
1927 | .write = iwl_dbgfs_##name##_write, \ | |
1928 | .open = iwl_dbgfs_open_file_generic, \ | |
1929 | .llseek = generic_file_llseek, \ | |
1930 | }; | |
1931 | ||
87e5666c EG |
1932 | #define DEBUGFS_READ_WRITE_FILE_OPS(name) \ |
1933 | DEBUGFS_READ_FUNC(name); \ | |
1934 | DEBUGFS_WRITE_FUNC(name); \ | |
1935 | static const struct file_operations iwl_dbgfs_##name##_ops = { \ | |
1936 | .write = iwl_dbgfs_##name##_write, \ | |
1937 | .read = iwl_dbgfs_##name##_read, \ | |
1938 | .open = iwl_dbgfs_open_file_generic, \ | |
1939 | .llseek = generic_file_llseek, \ | |
1940 | }; | |
1941 | ||
87e5666c EG |
1942 | static ssize_t iwl_dbgfs_tx_queue_read(struct file *file, |
1943 | char __user *user_buf, | |
8ad71bef EG |
1944 | size_t count, loff_t *ppos) |
1945 | { | |
5a878bf6 | 1946 | struct iwl_trans *trans = file->private_data; |
8ad71bef | 1947 | struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); |
87e5666c EG |
1948 | struct iwl_tx_queue *txq; |
1949 | struct iwl_queue *q; | |
1950 | char *buf; | |
1951 | int pos = 0; | |
1952 | int cnt; | |
1953 | int ret; | |
fd656935 | 1954 | const size_t bufsz = sizeof(char) * 64 * hw_params(trans).max_txq_num; |
87e5666c | 1955 | |
8ad71bef | 1956 | if (!trans_pcie->txq) { |
3e10caeb | 1957 | IWL_ERR(trans, "txq not ready\n"); |
87e5666c EG |
1958 | return -EAGAIN; |
1959 | } | |
1960 | buf = kzalloc(bufsz, GFP_KERNEL); | |
1961 | if (!buf) | |
1962 | return -ENOMEM; | |
1963 | ||
5a878bf6 | 1964 | for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) { |
8ad71bef | 1965 | txq = &trans_pcie->txq[cnt]; |
87e5666c EG |
1966 | q = &txq->q; |
1967 | pos += scnprintf(buf + pos, bufsz - pos, | |
1968 | "hwq %.2d: read=%u write=%u stop=%d" | |
1969 | " swq_id=%#.2x (ac %d/hwq %d)\n", | |
1970 | cnt, q->read_ptr, q->write_ptr, | |
8ad71bef | 1971 | !!test_bit(cnt, trans_pcie->queue_stopped), |
87e5666c EG |
1972 | txq->swq_id, txq->swq_id & 3, |
1973 | (txq->swq_id >> 2) & 0x1f); | |
1974 | if (cnt >= 4) | |
1975 | continue; | |
1976 | /* for the ACs, display the stop count too */ | |
1977 | pos += scnprintf(buf + pos, bufsz - pos, | |
8ad71bef EG |
1978 | " stop-count: %d\n", |
1979 | atomic_read(&trans_pcie->queue_stop_count[cnt])); | |
87e5666c EG |
1980 | } |
1981 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); | |
1982 | kfree(buf); | |
1983 | return ret; | |
1984 | } | |
1985 | ||
1986 | static ssize_t iwl_dbgfs_rx_queue_read(struct file *file, | |
1987 | char __user *user_buf, | |
1988 | size_t count, loff_t *ppos) { | |
5a878bf6 EG |
1989 | struct iwl_trans *trans = file->private_data; |
1990 | struct iwl_trans_pcie *trans_pcie = | |
1991 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
1992 | struct iwl_rx_queue *rxq = &trans_pcie->rxq; | |
87e5666c EG |
1993 | char buf[256]; |
1994 | int pos = 0; | |
1995 | const size_t bufsz = sizeof(buf); | |
1996 | ||
1997 | pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n", | |
1998 | rxq->read); | |
1999 | pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n", | |
2000 | rxq->write); | |
2001 | pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n", | |
2002 | rxq->free_count); | |
2003 | if (rxq->rb_stts) { | |
2004 | pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n", | |
2005 | le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF); | |
2006 | } else { | |
2007 | pos += scnprintf(buf + pos, bufsz - pos, | |
2008 | "closed_rb_num: Not Allocated\n"); | |
2009 | } | |
2010 | return simple_read_from_buffer(user_buf, count, ppos, buf, pos); | |
2011 | } | |
2012 | ||
7ff94706 EG |
2013 | static ssize_t iwl_dbgfs_log_event_read(struct file *file, |
2014 | char __user *user_buf, | |
2015 | size_t count, loff_t *ppos) | |
2016 | { | |
2017 | struct iwl_trans *trans = file->private_data; | |
2018 | char *buf; | |
2019 | int pos = 0; | |
2020 | ssize_t ret = -ENOMEM; | |
2021 | ||
6bb78847 | 2022 | ret = pos = iwl_dump_nic_event_log(trans, true, &buf, true); |
7ff94706 EG |
2023 | if (buf) { |
2024 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); | |
2025 | kfree(buf); | |
2026 | } | |
2027 | return ret; | |
2028 | } | |
2029 | ||
2030 | static ssize_t iwl_dbgfs_log_event_write(struct file *file, | |
2031 | const char __user *user_buf, | |
2032 | size_t count, loff_t *ppos) | |
2033 | { | |
2034 | struct iwl_trans *trans = file->private_data; | |
2035 | u32 event_log_flag; | |
2036 | char buf[8]; | |
2037 | int buf_size; | |
2038 | ||
2039 | memset(buf, 0, sizeof(buf)); | |
2040 | buf_size = min(count, sizeof(buf) - 1); | |
2041 | if (copy_from_user(buf, user_buf, buf_size)) | |
2042 | return -EFAULT; | |
2043 | if (sscanf(buf, "%d", &event_log_flag) != 1) | |
2044 | return -EFAULT; | |
2045 | if (event_log_flag == 1) | |
6bb78847 | 2046 | iwl_dump_nic_event_log(trans, true, NULL, false); |
7ff94706 EG |
2047 | |
2048 | return count; | |
2049 | } | |
2050 | ||
1f7b6172 EG |
2051 | static ssize_t iwl_dbgfs_interrupt_read(struct file *file, |
2052 | char __user *user_buf, | |
2053 | size_t count, loff_t *ppos) { | |
2054 | ||
2055 | struct iwl_trans *trans = file->private_data; | |
2056 | struct iwl_trans_pcie *trans_pcie = | |
2057 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
2058 | struct isr_statistics *isr_stats = &trans_pcie->isr_stats; | |
2059 | ||
2060 | int pos = 0; | |
2061 | char *buf; | |
2062 | int bufsz = 24 * 64; /* 24 items * 64 char per item */ | |
2063 | ssize_t ret; | |
2064 | ||
2065 | buf = kzalloc(bufsz, GFP_KERNEL); | |
2066 | if (!buf) { | |
2067 | IWL_ERR(trans, "Can not allocate Buffer\n"); | |
2068 | return -ENOMEM; | |
2069 | } | |
2070 | ||
2071 | pos += scnprintf(buf + pos, bufsz - pos, | |
2072 | "Interrupt Statistics Report:\n"); | |
2073 | ||
2074 | pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n", | |
2075 | isr_stats->hw); | |
2076 | pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n", | |
2077 | isr_stats->sw); | |
2078 | if (isr_stats->sw || isr_stats->hw) { | |
2079 | pos += scnprintf(buf + pos, bufsz - pos, | |
2080 | "\tLast Restarting Code: 0x%X\n", | |
2081 | isr_stats->err_code); | |
2082 | } | |
2083 | #ifdef CONFIG_IWLWIFI_DEBUG | |
2084 | pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n", | |
2085 | isr_stats->sch); | |
2086 | pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n", | |
2087 | isr_stats->alive); | |
2088 | #endif | |
2089 | pos += scnprintf(buf + pos, bufsz - pos, | |
2090 | "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill); | |
2091 | ||
2092 | pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n", | |
2093 | isr_stats->ctkill); | |
2094 | ||
2095 | pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n", | |
2096 | isr_stats->wakeup); | |
2097 | ||
2098 | pos += scnprintf(buf + pos, bufsz - pos, | |
2099 | "Rx command responses:\t\t %u\n", isr_stats->rx); | |
2100 | ||
2101 | pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n", | |
2102 | isr_stats->tx); | |
2103 | ||
2104 | pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n", | |
2105 | isr_stats->unhandled); | |
2106 | ||
2107 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); | |
2108 | kfree(buf); | |
2109 | return ret; | |
2110 | } | |
2111 | ||
2112 | static ssize_t iwl_dbgfs_interrupt_write(struct file *file, | |
2113 | const char __user *user_buf, | |
2114 | size_t count, loff_t *ppos) | |
2115 | { | |
2116 | struct iwl_trans *trans = file->private_data; | |
2117 | struct iwl_trans_pcie *trans_pcie = | |
2118 | IWL_TRANS_GET_PCIE_TRANS(trans); | |
2119 | struct isr_statistics *isr_stats = &trans_pcie->isr_stats; | |
2120 | ||
2121 | char buf[8]; | |
2122 | int buf_size; | |
2123 | u32 reset_flag; | |
2124 | ||
2125 | memset(buf, 0, sizeof(buf)); | |
2126 | buf_size = min(count, sizeof(buf) - 1); | |
2127 | if (copy_from_user(buf, user_buf, buf_size)) | |
2128 | return -EFAULT; | |
2129 | if (sscanf(buf, "%x", &reset_flag) != 1) | |
2130 | return -EFAULT; | |
2131 | if (reset_flag == 0) | |
2132 | memset(isr_stats, 0, sizeof(*isr_stats)); | |
2133 | ||
2134 | return count; | |
2135 | } | |
2136 | ||
16db88ba EG |
2137 | static ssize_t iwl_dbgfs_csr_write(struct file *file, |
2138 | const char __user *user_buf, | |
2139 | size_t count, loff_t *ppos) | |
2140 | { | |
2141 | struct iwl_trans *trans = file->private_data; | |
2142 | char buf[8]; | |
2143 | int buf_size; | |
2144 | int csr; | |
2145 | ||
2146 | memset(buf, 0, sizeof(buf)); | |
2147 | buf_size = min(count, sizeof(buf) - 1); | |
2148 | if (copy_from_user(buf, user_buf, buf_size)) | |
2149 | return -EFAULT; | |
2150 | if (sscanf(buf, "%d", &csr) != 1) | |
2151 | return -EFAULT; | |
2152 | ||
2153 | iwl_dump_csr(trans); | |
2154 | ||
2155 | return count; | |
2156 | } | |
2157 | ||
16db88ba EG |
2158 | static ssize_t iwl_dbgfs_fh_reg_read(struct file *file, |
2159 | char __user *user_buf, | |
2160 | size_t count, loff_t *ppos) | |
2161 | { | |
2162 | struct iwl_trans *trans = file->private_data; | |
2163 | char *buf; | |
2164 | int pos = 0; | |
2165 | ssize_t ret = -EFAULT; | |
2166 | ||
2167 | ret = pos = iwl_dump_fh(trans, &buf, true); | |
2168 | if (buf) { | |
2169 | ret = simple_read_from_buffer(user_buf, | |
2170 | count, ppos, buf, pos); | |
2171 | kfree(buf); | |
2172 | } | |
2173 | ||
2174 | return ret; | |
2175 | } | |
2176 | ||
7ff94706 | 2177 | DEBUGFS_READ_WRITE_FILE_OPS(log_event); |
1f7b6172 | 2178 | DEBUGFS_READ_WRITE_FILE_OPS(interrupt); |
16db88ba | 2179 | DEBUGFS_READ_FILE_OPS(fh_reg); |
87e5666c EG |
2180 | DEBUGFS_READ_FILE_OPS(rx_queue); |
2181 | DEBUGFS_READ_FILE_OPS(tx_queue); | |
16db88ba | 2182 | DEBUGFS_WRITE_FILE_OPS(csr); |
87e5666c EG |
2183 | |
2184 | /* | |
2185 | * Create the debugfs files and directories | |
2186 | * | |
2187 | */ | |
2188 | static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, | |
2189 | struct dentry *dir) | |
2190 | { | |
87e5666c EG |
2191 | DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR); |
2192 | DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR); | |
7ff94706 | 2193 | DEBUGFS_ADD_FILE(log_event, dir, S_IWUSR | S_IRUSR); |
1f7b6172 | 2194 | DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR); |
16db88ba EG |
2195 | DEBUGFS_ADD_FILE(csr, dir, S_IWUSR); |
2196 | DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR); | |
87e5666c EG |
2197 | return 0; |
2198 | } | |
2199 | #else | |
2200 | static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans, | |
2201 | struct dentry *dir) | |
2202 | { return 0; } | |
2203 | ||
2204 | #endif /*CONFIG_IWLWIFI_DEBUGFS */ | |
2205 | ||
e6bb4c9c | 2206 | const struct iwl_trans_ops trans_ops_pcie = { |
57a1dc89 | 2207 | .start_hw = iwl_trans_pcie_start_hw, |
cc56feb2 | 2208 | .stop_hw = iwl_trans_pcie_stop_hw, |
ed6a3803 | 2209 | .fw_alive = iwl_trans_pcie_fw_alive, |
cf614297 | 2210 | .start_fw = iwl_trans_pcie_start_fw, |
e6bb4c9c | 2211 | .stop_device = iwl_trans_pcie_stop_device, |
48d42c42 | 2212 | |
e13c0c59 | 2213 | .wake_any_queue = iwl_trans_pcie_wake_any_queue, |
48d42c42 | 2214 | |
e6bb4c9c | 2215 | .send_cmd = iwl_trans_pcie_send_cmd, |
c85eb619 | 2216 | |
e6bb4c9c | 2217 | .tx = iwl_trans_pcie_tx, |
a0eaad71 | 2218 | .reclaim = iwl_trans_pcie_reclaim, |
34c1b7ba | 2219 | |
7f01d567 | 2220 | .tx_agg_disable = iwl_trans_pcie_tx_agg_disable, |
288712a6 | 2221 | .tx_agg_alloc = iwl_trans_pcie_tx_agg_alloc, |
c91bd124 | 2222 | .tx_agg_setup = iwl_trans_pcie_tx_agg_setup, |
34c1b7ba | 2223 | |
e6bb4c9c | 2224 | .free = iwl_trans_pcie_free, |
e20d4341 | 2225 | .stop_queue = iwl_trans_pcie_stop_queue, |
87e5666c EG |
2226 | |
2227 | .dbgfs_register = iwl_trans_pcie_dbgfs_register, | |
5f178cd2 EG |
2228 | |
2229 | .wait_tx_queue_empty = iwl_trans_pcie_wait_tx_queue_empty, | |
f22be624 | 2230 | .check_stuck_queue = iwl_trans_pcie_check_stuck_queue, |
5f178cd2 | 2231 | |
c01a4047 | 2232 | #ifdef CONFIG_PM_SLEEP |
57210f7c EG |
2233 | .suspend = iwl_trans_pcie_suspend, |
2234 | .resume = iwl_trans_pcie_resume, | |
c01a4047 | 2235 | #endif |
03905495 EG |
2236 | .write8 = iwl_trans_pcie_write8, |
2237 | .write32 = iwl_trans_pcie_write32, | |
2238 | .read32 = iwl_trans_pcie_read32, | |
e6bb4c9c | 2239 | }; |
a42a1844 | 2240 | |
a42a1844 EG |
2241 | struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd, |
2242 | struct pci_dev *pdev, | |
2243 | const struct pci_device_id *ent) | |
2244 | { | |
a42a1844 EG |
2245 | struct iwl_trans_pcie *trans_pcie; |
2246 | struct iwl_trans *trans; | |
2247 | u16 pci_cmd; | |
2248 | int err; | |
2249 | ||
2250 | trans = kzalloc(sizeof(struct iwl_trans) + | |
2251 | sizeof(struct iwl_trans_pcie), GFP_KERNEL); | |
2252 | ||
2253 | if (WARN_ON(!trans)) | |
2254 | return NULL; | |
2255 | ||
2256 | trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); | |
2257 | ||
2258 | trans->ops = &trans_ops_pcie; | |
2259 | trans->shrd = shrd; | |
2260 | trans_pcie->trans = trans; | |
2261 | spin_lock_init(&trans->hcmd_lock); | |
2262 | ||
2263 | /* W/A - seems to solve weird behavior. We need to remove this if we | |
2264 | * don't want to stay in L1 all the time. This wastes a lot of power */ | |
2265 | pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | | |
2266 | PCIE_LINK_STATE_CLKPM); | |
2267 | ||
2268 | if (pci_enable_device(pdev)) { | |
2269 | err = -ENODEV; | |
2270 | goto out_no_pci; | |
2271 | } | |
2272 | ||
2273 | pci_set_master(pdev); | |
2274 | ||
2275 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); | |
2276 | if (!err) | |
2277 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36)); | |
2278 | if (err) { | |
2279 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); | |
2280 | if (!err) | |
2281 | err = pci_set_consistent_dma_mask(pdev, | |
2282 | DMA_BIT_MASK(32)); | |
2283 | /* both attempts failed: */ | |
2284 | if (err) { | |
2285 | dev_printk(KERN_ERR, &pdev->dev, | |
2286 | "No suitable DMA available.\n"); | |
2287 | goto out_pci_disable_device; | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | err = pci_request_regions(pdev, DRV_NAME); | |
2292 | if (err) { | |
2293 | dev_printk(KERN_ERR, &pdev->dev, "pci_request_regions failed"); | |
2294 | goto out_pci_disable_device; | |
2295 | } | |
2296 | ||
2297 | trans_pcie->hw_base = pci_iomap(pdev, 0, 0); | |
2298 | if (!trans_pcie->hw_base) { | |
2299 | dev_printk(KERN_ERR, &pdev->dev, "pci_iomap failed"); | |
2300 | err = -ENODEV; | |
2301 | goto out_pci_release_regions; | |
2302 | } | |
2303 | ||
a42a1844 EG |
2304 | dev_printk(KERN_INFO, &pdev->dev, |
2305 | "pci_resource_len = 0x%08llx\n", | |
2306 | (unsigned long long) pci_resource_len(pdev, 0)); | |
2307 | dev_printk(KERN_INFO, &pdev->dev, | |
2308 | "pci_resource_base = %p\n", trans_pcie->hw_base); | |
2309 | ||
2310 | dev_printk(KERN_INFO, &pdev->dev, | |
2311 | "HW Revision ID = 0x%X\n", pdev->revision); | |
2312 | ||
2313 | /* We disable the RETRY_TIMEOUT register (0x41) to keep | |
2314 | * PCI Tx retries from interfering with C3 CPU state */ | |
2315 | pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); | |
2316 | ||
2317 | err = pci_enable_msi(pdev); | |
2318 | if (err) | |
2319 | dev_printk(KERN_ERR, &pdev->dev, | |
2320 | "pci_enable_msi failed(0X%x)", err); | |
2321 | ||
2322 | trans->dev = &pdev->dev; | |
2323 | trans->irq = pdev->irq; | |
2324 | trans_pcie->pci_dev = pdev; | |
08079a49 | 2325 | trans->hw_rev = iwl_read32(trans, CSR_HW_REV); |
99673ee5 | 2326 | trans->hw_id = (pdev->device << 16) + pdev->subsystem_device; |
9ca85961 EG |
2327 | snprintf(trans->hw_id_str, sizeof(trans->hw_id_str), |
2328 | "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device); | |
a42a1844 EG |
2329 | |
2330 | /* TODO: Move this away, not needed if not MSI */ | |
2331 | /* enable rfkill interrupt: hw bug w/a */ | |
2332 | pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd); | |
2333 | if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { | |
2334 | pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; | |
2335 | pci_write_config_word(pdev, PCI_COMMAND, pci_cmd); | |
2336 | } | |
2337 | ||
2338 | return trans; | |
2339 | ||
2340 | out_pci_release_regions: | |
2341 | pci_release_regions(pdev); | |
2342 | out_pci_disable_device: | |
2343 | pci_disable_device(pdev); | |
2344 | out_no_pci: | |
2345 | kfree(trans); | |
2346 | return NULL; | |
2347 | } | |
2348 |