Commit | Line | Data |
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d930faee AK |
1 | /* |
2 | * Marvell Wireless LAN device driver: PCIE specific handling | |
3 | * | |
4 | * Copyright (C) 2011, Marvell International Ltd. | |
5 | * | |
6 | * This software file (the "File") is distributed by Marvell International | |
7 | * Ltd. under the terms of the GNU General Public License Version 2, June 1991 | |
8 | * (the "License"). You may use, redistribute and/or modify this File in | |
9 | * accordance with the terms and conditions of the License, a copy of which | |
10 | * is available by writing to the Free Software Foundation, Inc., | |
11 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the | |
12 | * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. | |
13 | * | |
14 | * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE | |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE | |
16 | * ARE EXPRESSLY DISCLAIMED. The License provides additional details about | |
17 | * this warranty disclaimer. | |
18 | */ | |
19 | ||
20 | #include <linux/firmware.h> | |
21 | ||
22 | #include "decl.h" | |
23 | #include "ioctl.h" | |
24 | #include "util.h" | |
25 | #include "fw.h" | |
26 | #include "main.h" | |
27 | #include "wmm.h" | |
28 | #include "11n.h" | |
29 | #include "pcie.h" | |
30 | ||
31 | #define PCIE_VERSION "1.0" | |
32 | #define DRV_NAME "Marvell mwifiex PCIe" | |
33 | ||
34 | static u8 user_rmmod; | |
35 | ||
36 | static struct mwifiex_if_ops pcie_ops; | |
37 | ||
38 | static struct semaphore add_remove_card_sem; | |
39 | static int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter); | |
40 | static int mwifiex_pcie_resume(struct pci_dev *pdev); | |
41 | ||
42 | /* | |
43 | * This function is called after skb allocation to update | |
44 | * "skb->cb" with physical address of data pointer. | |
45 | */ | |
46 | static phys_addr_t *mwifiex_update_sk_buff_pa(struct sk_buff *skb) | |
47 | { | |
48 | phys_addr_t *buf_pa = MWIFIEX_SKB_PACB(skb); | |
49 | ||
50 | *buf_pa = (phys_addr_t)virt_to_phys(skb->data); | |
51 | ||
52 | return buf_pa; | |
53 | } | |
54 | ||
55 | /* | |
56 | * This function reads sleep cookie and checks if FW is ready | |
57 | */ | |
58 | static bool mwifiex_pcie_ok_to_access_hw(struct mwifiex_adapter *adapter) | |
59 | { | |
60 | u32 *cookie_addr; | |
61 | struct pcie_service_card *card = adapter->card; | |
62 | ||
63 | if (card->sleep_cookie) { | |
64 | cookie_addr = (u32 *)card->sleep_cookie->data; | |
65 | dev_dbg(adapter->dev, "info: ACCESS_HW: sleep cookie=0x%x\n", | |
66 | *cookie_addr); | |
67 | if (*cookie_addr == FW_AWAKE_COOKIE) | |
68 | return true; | |
69 | } | |
70 | ||
71 | return false; | |
72 | } | |
73 | ||
74 | /* | |
75 | * This function probes an mwifiex device and registers it. It allocates | |
76 | * the card structure, enables PCIE function number and initiates the | |
77 | * device registration and initialization procedure by adding a logical | |
78 | * interface. | |
79 | */ | |
80 | static int mwifiex_pcie_probe(struct pci_dev *pdev, | |
81 | const struct pci_device_id *ent) | |
82 | { | |
83 | struct pcie_service_card *card; | |
84 | ||
85 | pr_debug("info: vendor=0x%4.04X device=0x%4.04X rev=%d\n", | |
f57c1edc | 86 | pdev->vendor, pdev->device, pdev->revision); |
d930faee AK |
87 | |
88 | card = kzalloc(sizeof(struct pcie_service_card), GFP_KERNEL); | |
e404decb | 89 | if (!card) |
d930faee | 90 | return -ENOMEM; |
d930faee AK |
91 | |
92 | card->dev = pdev; | |
93 | ||
94 | if (mwifiex_add_card(card, &add_remove_card_sem, &pcie_ops, | |
95 | MWIFIEX_PCIE)) { | |
96 | pr_err("%s failed\n", __func__); | |
97 | kfree(card); | |
98 | return -1; | |
99 | } | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | /* | |
105 | * This function removes the interface and frees up the card structure. | |
106 | */ | |
107 | static void mwifiex_pcie_remove(struct pci_dev *pdev) | |
108 | { | |
109 | struct pcie_service_card *card; | |
110 | struct mwifiex_adapter *adapter; | |
f57c1edc | 111 | struct mwifiex_private *priv; |
d930faee AK |
112 | int i; |
113 | ||
114 | card = pci_get_drvdata(pdev); | |
115 | if (!card) | |
116 | return; | |
117 | ||
118 | adapter = card->adapter; | |
119 | if (!adapter || !adapter->priv_num) | |
120 | return; | |
121 | ||
122 | if (user_rmmod) { | |
123 | #ifdef CONFIG_PM | |
124 | if (adapter->is_suspended) | |
125 | mwifiex_pcie_resume(pdev); | |
126 | #endif | |
127 | ||
128 | for (i = 0; i < adapter->priv_num; i++) | |
129 | if ((GET_BSS_ROLE(adapter->priv[i]) == | |
f57c1edc YAP |
130 | MWIFIEX_BSS_ROLE_STA) && |
131 | adapter->priv[i]->media_connected) | |
d930faee AK |
132 | mwifiex_deauthenticate(adapter->priv[i], NULL); |
133 | ||
f57c1edc | 134 | priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY); |
d930faee | 135 | |
f57c1edc YAP |
136 | mwifiex_disable_auto_ds(priv); |
137 | ||
138 | mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN); | |
d930faee AK |
139 | } |
140 | ||
141 | mwifiex_remove_card(card->adapter, &add_remove_card_sem); | |
142 | kfree(card); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Kernel needs to suspend all functions separately. Therefore all | |
147 | * registered functions must have drivers with suspend and resume | |
148 | * methods. Failing that the kernel simply removes the whole card. | |
149 | * | |
150 | * If already not suspended, this function allocates and sends a host | |
151 | * sleep activate request to the firmware and turns off the traffic. | |
152 | */ | |
153 | static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state) | |
154 | { | |
155 | struct mwifiex_adapter *adapter; | |
156 | struct pcie_service_card *card; | |
157 | int hs_actived, i; | |
158 | ||
159 | if (pdev) { | |
160 | card = (struct pcie_service_card *) pci_get_drvdata(pdev); | |
161 | if (!card || card->adapter) { | |
162 | pr_err("Card or adapter structure is not valid\n"); | |
163 | return 0; | |
164 | } | |
165 | } else { | |
166 | pr_err("PCIE device is not specified\n"); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | adapter = card->adapter; | |
171 | ||
172 | hs_actived = mwifiex_enable_hs(adapter); | |
173 | ||
174 | /* Indicate device suspended */ | |
175 | adapter->is_suspended = true; | |
176 | ||
177 | for (i = 0; i < adapter->priv_num; i++) | |
178 | netif_carrier_off(adapter->priv[i]->netdev); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Kernel needs to suspend all functions separately. Therefore all | |
185 | * registered functions must have drivers with suspend and resume | |
186 | * methods. Failing that the kernel simply removes the whole card. | |
187 | * | |
188 | * If already not resumed, this function turns on the traffic and | |
189 | * sends a host sleep cancel request to the firmware. | |
190 | */ | |
191 | static int mwifiex_pcie_resume(struct pci_dev *pdev) | |
192 | { | |
193 | struct mwifiex_adapter *adapter; | |
194 | struct pcie_service_card *card; | |
195 | int i; | |
196 | ||
197 | if (pdev) { | |
198 | card = (struct pcie_service_card *) pci_get_drvdata(pdev); | |
199 | if (!card || !card->adapter) { | |
200 | pr_err("Card or adapter structure is not valid\n"); | |
201 | return 0; | |
202 | } | |
203 | } else { | |
204 | pr_err("PCIE device is not specified\n"); | |
205 | return 0; | |
206 | } | |
207 | ||
208 | adapter = card->adapter; | |
209 | ||
210 | if (!adapter->is_suspended) { | |
211 | dev_warn(adapter->dev, "Device already resumed\n"); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | adapter->is_suspended = false; | |
216 | ||
217 | for (i = 0; i < adapter->priv_num; i++) | |
218 | if (adapter->priv[i]->media_connected) | |
219 | netif_carrier_on(adapter->priv[i]->netdev); | |
220 | ||
221 | mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), | |
f57c1edc | 222 | MWIFIEX_ASYNC_CMD); |
d930faee AK |
223 | |
224 | return 0; | |
225 | } | |
226 | ||
227 | #define PCIE_VENDOR_ID_MARVELL (0x11ab) | |
228 | #define PCIE_DEVICE_ID_MARVELL_88W8766P (0x2b30) | |
229 | ||
230 | static DEFINE_PCI_DEVICE_TABLE(mwifiex_ids) = { | |
231 | { | |
232 | PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8766P, | |
233 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, | |
234 | }, | |
235 | {}, | |
236 | }; | |
237 | ||
238 | MODULE_DEVICE_TABLE(pci, mwifiex_ids); | |
239 | ||
240 | /* PCI Device Driver */ | |
241 | static struct pci_driver __refdata mwifiex_pcie = { | |
242 | .name = "mwifiex_pcie", | |
243 | .id_table = mwifiex_ids, | |
244 | .probe = mwifiex_pcie_probe, | |
245 | .remove = mwifiex_pcie_remove, | |
246 | #ifdef CONFIG_PM | |
247 | /* Power Management Hooks */ | |
248 | .suspend = mwifiex_pcie_suspend, | |
249 | .resume = mwifiex_pcie_resume, | |
250 | #endif | |
251 | }; | |
252 | ||
253 | /* | |
254 | * This function writes data into PCIE card register. | |
255 | */ | |
256 | static int mwifiex_write_reg(struct mwifiex_adapter *adapter, int reg, u32 data) | |
257 | { | |
258 | struct pcie_service_card *card = adapter->card; | |
259 | ||
260 | iowrite32(data, card->pci_mmap1 + reg); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | /* | |
266 | * This function reads data from PCIE card register. | |
267 | */ | |
268 | static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data) | |
269 | { | |
270 | struct pcie_service_card *card = adapter->card; | |
271 | ||
272 | *data = ioread32(card->pci_mmap1 + reg); | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
277 | /* | |
278 | * This function wakes up the card. | |
279 | * | |
280 | * A host power up command is written to the card configuration | |
281 | * register to wake up the card. | |
282 | */ | |
283 | static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) | |
284 | { | |
285 | int i = 0; | |
286 | ||
287 | while (mwifiex_pcie_ok_to_access_hw(adapter)) { | |
288 | i++; | |
e7891ba2 | 289 | usleep_range(10, 20); |
d930faee AK |
290 | /* 50ms max wait */ |
291 | if (i == 50000) | |
292 | break; | |
293 | } | |
294 | ||
295 | dev_dbg(adapter->dev, "event: Wakeup device...\n"); | |
296 | ||
297 | /* Enable interrupts or any chip access will wakeup device */ | |
298 | if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, HOST_INTR_MASK)) { | |
299 | dev_warn(adapter->dev, "Enable host interrupt failed\n"); | |
300 | return -1; | |
301 | } | |
302 | ||
303 | dev_dbg(adapter->dev, "PCIE wakeup: Setting PS_STATE_AWAKE\n"); | |
304 | adapter->ps_state = PS_STATE_AWAKE; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | /* | |
310 | * This function is called after the card has woken up. | |
311 | * | |
312 | * The card configuration register is reset. | |
313 | */ | |
314 | static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter) | |
315 | { | |
316 | dev_dbg(adapter->dev, "cmd: Wakeup device completed\n"); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | /* | |
322 | * This function disables the host interrupt. | |
323 | * | |
324 | * The host interrupt mask is read, the disable bit is reset and | |
325 | * written back to the card host interrupt mask register. | |
326 | */ | |
327 | static int mwifiex_pcie_disable_host_int(struct mwifiex_adapter *adapter) | |
328 | { | |
329 | if (mwifiex_pcie_ok_to_access_hw(adapter)) { | |
330 | if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, | |
331 | 0x00000000)) { | |
332 | dev_warn(adapter->dev, "Disable host interrupt failed\n"); | |
333 | return -1; | |
334 | } | |
335 | } | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | /* | |
341 | * This function enables the host interrupt. | |
342 | * | |
343 | * The host interrupt enable mask is written to the card | |
344 | * host interrupt mask register. | |
345 | */ | |
346 | static int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter) | |
347 | { | |
348 | if (mwifiex_pcie_ok_to_access_hw(adapter)) { | |
349 | /* Simply write the mask to the register */ | |
350 | if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, | |
351 | HOST_INTR_MASK)) { | |
352 | dev_warn(adapter->dev, "Enable host interrupt failed\n"); | |
353 | return -1; | |
354 | } | |
355 | } | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | /* | |
361 | * This function creates buffer descriptor ring for TX | |
362 | */ | |
363 | static int mwifiex_pcie_create_txbd_ring(struct mwifiex_adapter *adapter) | |
364 | { | |
365 | struct pcie_service_card *card = adapter->card; | |
366 | struct sk_buff *skb; | |
367 | int i; | |
368 | phys_addr_t *buf_pa; | |
369 | ||
370 | /* | |
371 | * driver maintaines the write pointer and firmware maintaines the read | |
372 | * pointer. The write pointer starts at 0 (zero) while the read pointer | |
373 | * starts at zero with rollover bit set | |
374 | */ | |
375 | card->txbd_wrptr = 0; | |
376 | card->txbd_rdptr |= MWIFIEX_BD_FLAG_ROLLOVER_IND; | |
377 | ||
378 | /* allocate shared memory for the BD ring and divide the same in to | |
379 | several descriptors */ | |
380 | card->txbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) * | |
f57c1edc | 381 | MWIFIEX_MAX_TXRX_BD; |
d930faee | 382 | dev_dbg(adapter->dev, "info: txbd_ring: Allocating %d bytes\n", |
f57c1edc | 383 | card->txbd_ring_size); |
d930faee AK |
384 | card->txbd_ring_vbase = kzalloc(card->txbd_ring_size, GFP_KERNEL); |
385 | if (!card->txbd_ring_vbase) { | |
f57c1edc | 386 | dev_err(adapter->dev, "Unable to alloc buffer for txbd ring\n"); |
8c53e42d | 387 | return -ENOMEM; |
d930faee AK |
388 | } |
389 | card->txbd_ring_pbase = virt_to_phys(card->txbd_ring_vbase); | |
390 | ||
f57c1edc YAP |
391 | dev_dbg(adapter->dev, |
392 | "info: txbd_ring - base: %p, pbase: %#x:%x, len: %x\n", | |
393 | card->txbd_ring_vbase, (u32)card->txbd_ring_pbase, | |
394 | (u32)((u64)card->txbd_ring_pbase >> 32), card->txbd_ring_size); | |
d930faee AK |
395 | |
396 | for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { | |
397 | card->txbd_ring[i] = (struct mwifiex_pcie_buf_desc *) | |
f57c1edc YAP |
398 | (card->txbd_ring_vbase + |
399 | (sizeof(struct mwifiex_pcie_buf_desc) | |
400 | * i)); | |
d930faee AK |
401 | |
402 | /* Allocate buffer here so that firmware can DMA data from it */ | |
403 | skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE); | |
404 | if (!skb) { | |
405 | dev_err(adapter->dev, "Unable to allocate skb for TX ring.\n"); | |
406 | kfree(card->txbd_ring_vbase); | |
407 | return -ENOMEM; | |
408 | } | |
409 | buf_pa = mwifiex_update_sk_buff_pa(skb); | |
410 | ||
411 | skb_put(skb, MWIFIEX_RX_DATA_BUF_SIZE); | |
412 | dev_dbg(adapter->dev, "info: TX ring: add new skb base: %p, " | |
f57c1edc YAP |
413 | "buf_base: %p, buf_pbase: %#x:%x, buf_len: %#x\n", |
414 | skb, skb->data, (u32)*buf_pa, | |
415 | (u32)(((u64)*buf_pa >> 32)), skb->len); | |
d930faee AK |
416 | |
417 | card->tx_buf_list[i] = skb; | |
418 | card->txbd_ring[i]->paddr = *buf_pa; | |
419 | card->txbd_ring[i]->len = (u16)skb->len; | |
420 | card->txbd_ring[i]->flags = 0; | |
421 | } | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | static int mwifiex_pcie_delete_txbd_ring(struct mwifiex_adapter *adapter) | |
427 | { | |
428 | struct pcie_service_card *card = adapter->card; | |
429 | int i; | |
430 | ||
431 | for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { | |
432 | if (card->tx_buf_list[i]) | |
433 | dev_kfree_skb_any(card->tx_buf_list[i]); | |
434 | card->tx_buf_list[i] = NULL; | |
435 | card->txbd_ring[i]->paddr = 0; | |
436 | card->txbd_ring[i]->len = 0; | |
437 | card->txbd_ring[i]->flags = 0; | |
438 | card->txbd_ring[i] = NULL; | |
439 | } | |
440 | ||
441 | kfree(card->txbd_ring_vbase); | |
442 | card->txbd_ring_size = 0; | |
443 | card->txbd_wrptr = 0; | |
444 | card->txbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND; | |
445 | card->txbd_ring_vbase = NULL; | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | /* | |
451 | * This function creates buffer descriptor ring for RX | |
452 | */ | |
453 | static int mwifiex_pcie_create_rxbd_ring(struct mwifiex_adapter *adapter) | |
454 | { | |
455 | struct pcie_service_card *card = adapter->card; | |
456 | struct sk_buff *skb; | |
457 | int i; | |
458 | phys_addr_t *buf_pa; | |
459 | ||
460 | /* | |
461 | * driver maintaines the read pointer and firmware maintaines the write | |
462 | * pointer. The write pointer starts at 0 (zero) while the read pointer | |
463 | * starts at zero with rollover bit set | |
464 | */ | |
465 | card->rxbd_wrptr = 0; | |
466 | card->rxbd_rdptr |= MWIFIEX_BD_FLAG_ROLLOVER_IND; | |
467 | ||
468 | card->rxbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) * | |
f57c1edc | 469 | MWIFIEX_MAX_TXRX_BD; |
d930faee | 470 | dev_dbg(adapter->dev, "info: rxbd_ring: Allocating %d bytes\n", |
f57c1edc | 471 | card->rxbd_ring_size); |
d930faee AK |
472 | card->rxbd_ring_vbase = kzalloc(card->rxbd_ring_size, GFP_KERNEL); |
473 | if (!card->rxbd_ring_vbase) { | |
474 | dev_err(adapter->dev, "Unable to allocate buffer for " | |
475 | "rxbd_ring.\n"); | |
8c53e42d | 476 | return -ENOMEM; |
d930faee AK |
477 | } |
478 | card->rxbd_ring_pbase = virt_to_phys(card->rxbd_ring_vbase); | |
479 | ||
f57c1edc YAP |
480 | dev_dbg(adapter->dev, |
481 | "info: rxbd_ring - base: %p, pbase: %#x:%x, len: %#x\n", | |
482 | card->rxbd_ring_vbase, (u32)card->rxbd_ring_pbase, | |
483 | (u32)((u64)card->rxbd_ring_pbase >> 32), | |
484 | card->rxbd_ring_size); | |
d930faee AK |
485 | |
486 | for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { | |
487 | card->rxbd_ring[i] = (struct mwifiex_pcie_buf_desc *) | |
f57c1edc YAP |
488 | (card->rxbd_ring_vbase + |
489 | (sizeof(struct mwifiex_pcie_buf_desc) | |
490 | * i)); | |
d930faee AK |
491 | |
492 | /* Allocate skb here so that firmware can DMA data from it */ | |
493 | skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE); | |
494 | if (!skb) { | |
f57c1edc YAP |
495 | dev_err(adapter->dev, |
496 | "Unable to allocate skb for RX ring.\n"); | |
d930faee AK |
497 | kfree(card->rxbd_ring_vbase); |
498 | return -ENOMEM; | |
499 | } | |
500 | buf_pa = mwifiex_update_sk_buff_pa(skb); | |
501 | skb_put(skb, MWIFIEX_RX_DATA_BUF_SIZE); | |
502 | ||
503 | dev_dbg(adapter->dev, "info: RX ring: add new skb base: %p, " | |
f57c1edc YAP |
504 | "buf_base: %p, buf_pbase: %#x:%x, buf_len: %#x\n", |
505 | skb, skb->data, (u32)*buf_pa, (u32)((u64)*buf_pa >> 32), | |
506 | skb->len); | |
d930faee AK |
507 | |
508 | card->rx_buf_list[i] = skb; | |
509 | card->rxbd_ring[i]->paddr = *buf_pa; | |
510 | card->rxbd_ring[i]->len = (u16)skb->len; | |
511 | card->rxbd_ring[i]->flags = 0; | |
512 | } | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | /* | |
518 | * This function deletes Buffer descriptor ring for RX | |
519 | */ | |
520 | static int mwifiex_pcie_delete_rxbd_ring(struct mwifiex_adapter *adapter) | |
521 | { | |
522 | struct pcie_service_card *card = adapter->card; | |
523 | int i; | |
524 | ||
525 | for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) { | |
526 | if (card->rx_buf_list[i]) | |
527 | dev_kfree_skb_any(card->rx_buf_list[i]); | |
528 | card->rx_buf_list[i] = NULL; | |
529 | card->rxbd_ring[i]->paddr = 0; | |
530 | card->rxbd_ring[i]->len = 0; | |
531 | card->rxbd_ring[i]->flags = 0; | |
532 | card->rxbd_ring[i] = NULL; | |
533 | } | |
534 | ||
535 | kfree(card->rxbd_ring_vbase); | |
536 | card->rxbd_ring_size = 0; | |
537 | card->rxbd_wrptr = 0; | |
538 | card->rxbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND; | |
539 | card->rxbd_ring_vbase = NULL; | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
544 | /* | |
545 | * This function creates buffer descriptor ring for Events | |
546 | */ | |
547 | static int mwifiex_pcie_create_evtbd_ring(struct mwifiex_adapter *adapter) | |
548 | { | |
549 | struct pcie_service_card *card = adapter->card; | |
550 | struct sk_buff *skb; | |
551 | int i; | |
552 | phys_addr_t *buf_pa; | |
553 | ||
554 | /* | |
555 | * driver maintaines the read pointer and firmware maintaines the write | |
556 | * pointer. The write pointer starts at 0 (zero) while the read pointer | |
557 | * starts at zero with rollover bit set | |
558 | */ | |
559 | card->evtbd_wrptr = 0; | |
560 | card->evtbd_rdptr |= MWIFIEX_BD_FLAG_ROLLOVER_IND; | |
561 | ||
562 | card->evtbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) * | |
f57c1edc | 563 | MWIFIEX_MAX_EVT_BD; |
d930faee | 564 | dev_dbg(adapter->dev, "info: evtbd_ring: Allocating %d bytes\n", |
f57c1edc | 565 | card->evtbd_ring_size); |
d930faee AK |
566 | card->evtbd_ring_vbase = kzalloc(card->evtbd_ring_size, GFP_KERNEL); |
567 | if (!card->evtbd_ring_vbase) { | |
f57c1edc YAP |
568 | dev_err(adapter->dev, |
569 | "Unable to allocate buffer. Terminating download\n"); | |
8c53e42d | 570 | return -ENOMEM; |
d930faee AK |
571 | } |
572 | card->evtbd_ring_pbase = virt_to_phys(card->evtbd_ring_vbase); | |
573 | ||
f57c1edc YAP |
574 | dev_dbg(adapter->dev, |
575 | "info: CMDRSP/EVT bd_ring - base: %p pbase: %#x:%x len: %#x\n", | |
576 | card->evtbd_ring_vbase, (u32)card->evtbd_ring_pbase, | |
577 | (u32)((u64)card->evtbd_ring_pbase >> 32), | |
578 | card->evtbd_ring_size); | |
d930faee AK |
579 | |
580 | for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) { | |
581 | card->evtbd_ring[i] = (struct mwifiex_pcie_buf_desc *) | |
f57c1edc YAP |
582 | (card->evtbd_ring_vbase + |
583 | (sizeof(struct mwifiex_pcie_buf_desc) | |
584 | * i)); | |
d930faee AK |
585 | |
586 | /* Allocate skb here so that firmware can DMA data from it */ | |
587 | skb = dev_alloc_skb(MAX_EVENT_SIZE); | |
588 | if (!skb) { | |
f57c1edc YAP |
589 | dev_err(adapter->dev, |
590 | "Unable to allocate skb for EVENT buf.\n"); | |
d930faee AK |
591 | kfree(card->evtbd_ring_vbase); |
592 | return -ENOMEM; | |
593 | } | |
594 | buf_pa = mwifiex_update_sk_buff_pa(skb); | |
595 | skb_put(skb, MAX_EVENT_SIZE); | |
596 | ||
597 | dev_dbg(adapter->dev, "info: Evt ring: add new skb. base: %p, " | |
f57c1edc YAP |
598 | "buf_base: %p, buf_pbase: %#x:%x, buf_len: %#x\n", |
599 | skb, skb->data, (u32)*buf_pa, (u32)((u64)*buf_pa >> 32), | |
600 | skb->len); | |
d930faee AK |
601 | |
602 | card->evt_buf_list[i] = skb; | |
603 | card->evtbd_ring[i]->paddr = *buf_pa; | |
604 | card->evtbd_ring[i]->len = (u16)skb->len; | |
605 | card->evtbd_ring[i]->flags = 0; | |
606 | } | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | /* | |
612 | * This function deletes Buffer descriptor ring for Events | |
613 | */ | |
614 | static int mwifiex_pcie_delete_evtbd_ring(struct mwifiex_adapter *adapter) | |
615 | { | |
616 | struct pcie_service_card *card = adapter->card; | |
617 | int i; | |
618 | ||
619 | for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) { | |
620 | if (card->evt_buf_list[i]) | |
621 | dev_kfree_skb_any(card->evt_buf_list[i]); | |
622 | card->evt_buf_list[i] = NULL; | |
623 | card->evtbd_ring[i]->paddr = 0; | |
624 | card->evtbd_ring[i]->len = 0; | |
625 | card->evtbd_ring[i]->flags = 0; | |
626 | card->evtbd_ring[i] = NULL; | |
627 | } | |
628 | ||
629 | kfree(card->evtbd_ring_vbase); | |
630 | card->evtbd_wrptr = 0; | |
631 | card->evtbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND; | |
632 | card->evtbd_ring_size = 0; | |
633 | card->evtbd_ring_vbase = NULL; | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | /* | |
639 | * This function allocates a buffer for CMDRSP | |
640 | */ | |
641 | static int mwifiex_pcie_alloc_cmdrsp_buf(struct mwifiex_adapter *adapter) | |
642 | { | |
643 | struct pcie_service_card *card = adapter->card; | |
644 | struct sk_buff *skb; | |
645 | ||
646 | /* Allocate memory for receiving command response data */ | |
647 | skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE); | |
648 | if (!skb) { | |
f57c1edc YAP |
649 | dev_err(adapter->dev, |
650 | "Unable to allocate skb for command response data.\n"); | |
d930faee AK |
651 | return -ENOMEM; |
652 | } | |
653 | mwifiex_update_sk_buff_pa(skb); | |
654 | skb_put(skb, MWIFIEX_UPLD_SIZE); | |
655 | card->cmdrsp_buf = skb; | |
656 | ||
657 | skb = NULL; | |
658 | /* Allocate memory for sending command to firmware */ | |
659 | skb = dev_alloc_skb(MWIFIEX_SIZE_OF_CMD_BUFFER); | |
660 | if (!skb) { | |
f57c1edc YAP |
661 | dev_err(adapter->dev, |
662 | "Unable to allocate skb for command data.\n"); | |
d930faee AK |
663 | return -ENOMEM; |
664 | } | |
665 | mwifiex_update_sk_buff_pa(skb); | |
666 | skb_put(skb, MWIFIEX_SIZE_OF_CMD_BUFFER); | |
667 | card->cmd_buf = skb; | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | /* | |
673 | * This function deletes a buffer for CMDRSP | |
674 | */ | |
675 | static int mwifiex_pcie_delete_cmdrsp_buf(struct mwifiex_adapter *adapter) | |
676 | { | |
677 | struct pcie_service_card *card; | |
678 | ||
679 | if (!adapter) | |
680 | return 0; | |
681 | ||
682 | card = adapter->card; | |
683 | ||
684 | if (card && card->cmdrsp_buf) | |
685 | dev_kfree_skb_any(card->cmdrsp_buf); | |
686 | ||
687 | if (card && card->cmd_buf) | |
688 | dev_kfree_skb_any(card->cmd_buf); | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
693 | /* | |
694 | * This function allocates a buffer for sleep cookie | |
695 | */ | |
696 | static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter) | |
697 | { | |
698 | struct sk_buff *skb; | |
699 | struct pcie_service_card *card = adapter->card; | |
700 | ||
701 | /* Allocate memory for sleep cookie */ | |
702 | skb = dev_alloc_skb(sizeof(u32)); | |
703 | if (!skb) { | |
f57c1edc YAP |
704 | dev_err(adapter->dev, |
705 | "Unable to allocate skb for sleep cookie!\n"); | |
d930faee AK |
706 | return -ENOMEM; |
707 | } | |
708 | mwifiex_update_sk_buff_pa(skb); | |
709 | skb_put(skb, sizeof(u32)); | |
710 | ||
711 | /* Init val of Sleep Cookie */ | |
712 | *(u32 *)skb->data = FW_AWAKE_COOKIE; | |
713 | ||
714 | dev_dbg(adapter->dev, "alloc_scook: sleep cookie=0x%x\n", | |
f57c1edc | 715 | *((u32 *)skb->data)); |
d930faee AK |
716 | |
717 | /* Save the sleep cookie */ | |
718 | card->sleep_cookie = skb; | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | /* | |
724 | * This function deletes buffer for sleep cookie | |
725 | */ | |
726 | static int mwifiex_pcie_delete_sleep_cookie_buf(struct mwifiex_adapter *adapter) | |
727 | { | |
728 | struct pcie_service_card *card; | |
729 | ||
730 | if (!adapter) | |
731 | return 0; | |
732 | ||
733 | card = adapter->card; | |
734 | ||
735 | if (card && card->sleep_cookie) { | |
736 | dev_kfree_skb_any(card->sleep_cookie); | |
737 | card->sleep_cookie = NULL; | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
743 | /* | |
744 | * This function sends data buffer to device | |
745 | */ | |
746 | static int | |
747 | mwifiex_pcie_send_data(struct mwifiex_adapter *adapter, struct sk_buff *skb) | |
748 | { | |
749 | struct pcie_service_card *card = adapter->card; | |
750 | u32 wrindx, rdptr; | |
751 | phys_addr_t *buf_pa; | |
752 | __le16 *tmp; | |
753 | ||
754 | if (!mwifiex_pcie_ok_to_access_hw(adapter)) | |
755 | mwifiex_pm_wakeup_card(adapter); | |
756 | ||
757 | /* Read the TX ring read pointer set by firmware */ | |
758 | if (mwifiex_read_reg(adapter, REG_TXBD_RDPTR, &rdptr)) { | |
f57c1edc YAP |
759 | dev_err(adapter->dev, |
760 | "SEND DATA: failed to read REG_TXBD_RDPTR\n"); | |
d930faee AK |
761 | return -1; |
762 | } | |
763 | ||
764 | wrindx = card->txbd_wrptr & MWIFIEX_TXBD_MASK; | |
765 | ||
766 | dev_dbg(adapter->dev, "info: SEND DATA: <Rd: %#x, Wr: %#x>\n", rdptr, | |
f57c1edc | 767 | card->txbd_wrptr); |
d930faee AK |
768 | if (((card->txbd_wrptr & MWIFIEX_TXBD_MASK) != |
769 | (rdptr & MWIFIEX_TXBD_MASK)) || | |
770 | ((card->txbd_wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) != | |
771 | (rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) { | |
772 | struct sk_buff *skb_data; | |
773 | u8 *payload; | |
774 | ||
775 | adapter->data_sent = true; | |
776 | skb_data = card->tx_buf_list[wrindx]; | |
777 | memcpy(skb_data->data, skb->data, skb->len); | |
778 | payload = skb_data->data; | |
779 | tmp = (__le16 *)&payload[0]; | |
780 | *tmp = cpu_to_le16((u16)skb->len); | |
781 | tmp = (__le16 *)&payload[2]; | |
782 | *tmp = cpu_to_le16(MWIFIEX_TYPE_DATA); | |
783 | skb_put(skb_data, MWIFIEX_RX_DATA_BUF_SIZE - skb_data->len); | |
784 | skb_trim(skb_data, skb->len); | |
785 | buf_pa = MWIFIEX_SKB_PACB(skb_data); | |
786 | card->txbd_ring[wrindx]->paddr = *buf_pa; | |
787 | card->txbd_ring[wrindx]->len = (u16)skb_data->len; | |
788 | card->txbd_ring[wrindx]->flags = MWIFIEX_BD_FLAG_FIRST_DESC | | |
789 | MWIFIEX_BD_FLAG_LAST_DESC; | |
790 | ||
791 | if ((++card->txbd_wrptr & MWIFIEX_TXBD_MASK) == | |
792 | MWIFIEX_MAX_TXRX_BD) | |
793 | card->txbd_wrptr = ((card->txbd_wrptr & | |
794 | MWIFIEX_BD_FLAG_ROLLOVER_IND) ^ | |
795 | MWIFIEX_BD_FLAG_ROLLOVER_IND); | |
796 | ||
797 | /* Write the TX ring write pointer in to REG_TXBD_WRPTR */ | |
798 | if (mwifiex_write_reg(adapter, REG_TXBD_WRPTR, | |
f57c1edc YAP |
799 | card->txbd_wrptr)) { |
800 | dev_err(adapter->dev, | |
801 | "SEND DATA: failed to write REG_TXBD_WRPTR\n"); | |
d930faee AK |
802 | return 0; |
803 | } | |
804 | ||
805 | /* Send the TX ready interrupt */ | |
806 | if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, | |
807 | CPU_INTR_DNLD_RDY)) { | |
f57c1edc YAP |
808 | dev_err(adapter->dev, |
809 | "SEND DATA: failed to assert door-bell intr\n"); | |
d930faee AK |
810 | return -1; |
811 | } | |
812 | dev_dbg(adapter->dev, "info: SEND DATA: Updated <Rd: %#x, Wr: " | |
f57c1edc YAP |
813 | "%#x> and sent packet to firmware successfully\n", |
814 | rdptr, card->txbd_wrptr); | |
d930faee | 815 | } else { |
f57c1edc YAP |
816 | dev_dbg(adapter->dev, |
817 | "info: TX Ring full, can't send packets to fw\n"); | |
d930faee AK |
818 | adapter->data_sent = true; |
819 | /* Send the TX ready interrupt */ | |
820 | if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, | |
821 | CPU_INTR_DNLD_RDY)) | |
f57c1edc YAP |
822 | dev_err(adapter->dev, |
823 | "SEND DATA: failed to assert door-bell intr\n"); | |
d930faee AK |
824 | return -EBUSY; |
825 | } | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | /* | |
831 | * This function handles received buffer ring and | |
832 | * dispatches packets to upper | |
833 | */ | |
834 | static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter) | |
835 | { | |
836 | struct pcie_service_card *card = adapter->card; | |
837 | u32 wrptr, rd_index; | |
838 | int ret = 0; | |
839 | struct sk_buff *skb_tmp = NULL; | |
840 | ||
841 | /* Read the RX ring Write pointer set by firmware */ | |
842 | if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) { | |
f57c1edc YAP |
843 | dev_err(adapter->dev, |
844 | "RECV DATA: failed to read REG_TXBD_RDPTR\n"); | |
d930faee AK |
845 | ret = -1; |
846 | goto done; | |
847 | } | |
848 | ||
849 | while (((wrptr & MWIFIEX_RXBD_MASK) != | |
850 | (card->rxbd_rdptr & MWIFIEX_RXBD_MASK)) || | |
851 | ((wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) == | |
852 | (card->rxbd_rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) { | |
853 | struct sk_buff *skb_data; | |
854 | u16 rx_len; | |
855 | ||
856 | rd_index = card->rxbd_rdptr & MWIFIEX_RXBD_MASK; | |
857 | skb_data = card->rx_buf_list[rd_index]; | |
858 | ||
859 | /* Get data length from interface header - | |
860 | first byte is len, second byte is type */ | |
861 | rx_len = *((u16 *)skb_data->data); | |
f57c1edc YAP |
862 | dev_dbg(adapter->dev, |
863 | "info: RECV DATA: Rd=%#x, Wr=%#x, Len=%d\n", | |
864 | card->rxbd_rdptr, wrptr, rx_len); | |
d930faee AK |
865 | skb_tmp = dev_alloc_skb(rx_len); |
866 | if (!skb_tmp) { | |
f57c1edc YAP |
867 | dev_dbg(adapter->dev, |
868 | "info: Failed to alloc skb for RX\n"); | |
d930faee AK |
869 | ret = -EBUSY; |
870 | goto done; | |
871 | } | |
872 | ||
873 | skb_put(skb_tmp, rx_len); | |
874 | ||
875 | memcpy(skb_tmp->data, skb_data->data + INTF_HEADER_LEN, rx_len); | |
876 | if ((++card->rxbd_rdptr & MWIFIEX_RXBD_MASK) == | |
877 | MWIFIEX_MAX_TXRX_BD) { | |
878 | card->rxbd_rdptr = ((card->rxbd_rdptr & | |
879 | MWIFIEX_BD_FLAG_ROLLOVER_IND) ^ | |
880 | MWIFIEX_BD_FLAG_ROLLOVER_IND); | |
881 | } | |
882 | dev_dbg(adapter->dev, "info: RECV DATA: <Rd: %#x, Wr: %#x>\n", | |
f57c1edc | 883 | card->rxbd_rdptr, wrptr); |
d930faee AK |
884 | |
885 | /* Write the RX ring read pointer in to REG_RXBD_RDPTR */ | |
886 | if (mwifiex_write_reg(adapter, REG_RXBD_RDPTR, | |
887 | card->rxbd_rdptr)) { | |
f57c1edc YAP |
888 | dev_err(adapter->dev, |
889 | "RECV DATA: failed to write REG_RXBD_RDPTR\n"); | |
d930faee AK |
890 | ret = -1; |
891 | goto done; | |
892 | } | |
893 | ||
894 | /* Read the RX ring Write pointer set by firmware */ | |
895 | if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) { | |
f57c1edc YAP |
896 | dev_err(adapter->dev, |
897 | "RECV DATA: failed to read REG_TXBD_RDPTR\n"); | |
d930faee AK |
898 | ret = -1; |
899 | goto done; | |
900 | } | |
f57c1edc YAP |
901 | dev_dbg(adapter->dev, |
902 | "info: RECV DATA: Rcvd packet from fw successfully\n"); | |
d930faee AK |
903 | mwifiex_handle_rx_packet(adapter, skb_tmp); |
904 | } | |
905 | ||
906 | done: | |
907 | if (ret && skb_tmp) | |
908 | dev_kfree_skb_any(skb_tmp); | |
909 | return ret; | |
910 | } | |
911 | ||
912 | /* | |
913 | * This function downloads the boot command to device | |
914 | */ | |
915 | static int | |
916 | mwifiex_pcie_send_boot_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb) | |
917 | { | |
918 | phys_addr_t *buf_pa = MWIFIEX_SKB_PACB(skb); | |
919 | ||
920 | if (!(skb->data && skb->len && *buf_pa)) { | |
f57c1edc YAP |
921 | dev_err(adapter->dev, |
922 | "Invalid parameter in %s <%p, %#x:%x, %x>\n", | |
923 | __func__, skb->data, skb->len, | |
924 | (u32)*buf_pa, (u32)((u64)*buf_pa >> 32)); | |
d930faee AK |
925 | return -1; |
926 | } | |
927 | ||
928 | /* Write the lower 32bits of the physical address to scratch | |
929 | * register 0 */ | |
930 | if (mwifiex_write_reg(adapter, PCIE_SCRATCH_0_REG, (u32)*buf_pa)) { | |
f57c1edc YAP |
931 | dev_err(adapter->dev, |
932 | "%s: failed to write download command to boot code.\n", | |
933 | __func__); | |
d930faee AK |
934 | return -1; |
935 | } | |
936 | ||
937 | /* Write the upper 32bits of the physical address to scratch | |
938 | * register 1 */ | |
939 | if (mwifiex_write_reg(adapter, PCIE_SCRATCH_1_REG, | |
940 | (u32)((u64)*buf_pa >> 32))) { | |
f57c1edc YAP |
941 | dev_err(adapter->dev, |
942 | "%s: failed to write download command to boot code.\n", | |
943 | __func__); | |
d930faee AK |
944 | return -1; |
945 | } | |
946 | ||
947 | /* Write the command length to scratch register 2 */ | |
948 | if (mwifiex_write_reg(adapter, PCIE_SCRATCH_2_REG, skb->len)) { | |
f57c1edc YAP |
949 | dev_err(adapter->dev, |
950 | "%s: failed to write command len to scratch reg 2\n", | |
951 | __func__); | |
d930faee AK |
952 | return -1; |
953 | } | |
954 | ||
955 | /* Ring the door bell */ | |
956 | if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, | |
957 | CPU_INTR_DOOR_BELL)) { | |
f57c1edc YAP |
958 | dev_err(adapter->dev, |
959 | "%s: failed to assert door-bell intr\n", __func__); | |
d930faee AK |
960 | return -1; |
961 | } | |
962 | ||
963 | return 0; | |
964 | } | |
965 | ||
966 | /* | |
967 | * This function downloads commands to the device | |
968 | */ | |
969 | static int | |
970 | mwifiex_pcie_send_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb) | |
971 | { | |
972 | struct pcie_service_card *card = adapter->card; | |
973 | int ret = 0; | |
974 | phys_addr_t *cmd_buf_pa; | |
975 | phys_addr_t *cmdrsp_buf_pa; | |
976 | ||
977 | if (!(skb->data && skb->len)) { | |
978 | dev_err(adapter->dev, "Invalid parameter in %s <%p, %#x>\n", | |
f57c1edc | 979 | __func__, skb->data, skb->len); |
d930faee AK |
980 | return -1; |
981 | } | |
982 | ||
983 | /* Make sure a command response buffer is available */ | |
984 | if (!card->cmdrsp_buf) { | |
f57c1edc YAP |
985 | dev_err(adapter->dev, |
986 | "No response buffer available, send command failed\n"); | |
d930faee AK |
987 | return -EBUSY; |
988 | } | |
989 | ||
990 | /* Make sure a command buffer is available */ | |
991 | if (!card->cmd_buf) { | |
992 | dev_err(adapter->dev, "Command buffer not available\n"); | |
993 | return -EBUSY; | |
994 | } | |
995 | ||
996 | adapter->cmd_sent = true; | |
997 | /* Copy the given skb in to DMA accessable shared buffer */ | |
998 | skb_put(card->cmd_buf, MWIFIEX_SIZE_OF_CMD_BUFFER - card->cmd_buf->len); | |
999 | skb_trim(card->cmd_buf, skb->len); | |
1000 | memcpy(card->cmd_buf->data, skb->data, skb->len); | |
1001 | ||
1002 | /* To send a command, the driver will: | |
1003 | 1. Write the 64bit physical address of the data buffer to | |
1004 | SCRATCH1 + SCRATCH0 | |
1005 | 2. Ring the door bell (i.e. set the door bell interrupt) | |
1006 | ||
1007 | In response to door bell interrupt, the firmware will perform | |
1008 | the DMA of the command packet (first header to obtain the total | |
1009 | length and then rest of the command). | |
1010 | */ | |
1011 | ||
1012 | if (card->cmdrsp_buf) { | |
1013 | cmdrsp_buf_pa = MWIFIEX_SKB_PACB(card->cmdrsp_buf); | |
1014 | /* Write the lower 32bits of the cmdrsp buffer physical | |
1015 | address */ | |
1016 | if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_LO, | |
f57c1edc YAP |
1017 | (u32)*cmdrsp_buf_pa)) { |
1018 | dev_err(adapter->dev, | |
1019 | "Failed to write download cmd to boot code.\n"); | |
d930faee AK |
1020 | ret = -1; |
1021 | goto done; | |
1022 | } | |
1023 | /* Write the upper 32bits of the cmdrsp buffer physical | |
1024 | address */ | |
1025 | if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_HI, | |
f57c1edc YAP |
1026 | (u32)((u64)*cmdrsp_buf_pa >> 32))) { |
1027 | dev_err(adapter->dev, | |
1028 | "Failed to write download cmd to boot code.\n"); | |
d930faee AK |
1029 | ret = -1; |
1030 | goto done; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | cmd_buf_pa = MWIFIEX_SKB_PACB(card->cmd_buf); | |
1035 | /* Write the lower 32bits of the physical address to REG_CMD_ADDR_LO */ | |
f57c1edc YAP |
1036 | if (mwifiex_write_reg(adapter, REG_CMD_ADDR_LO, (u32)*cmd_buf_pa)) { |
1037 | dev_err(adapter->dev, | |
1038 | "Failed to write download cmd to boot code.\n"); | |
d930faee AK |
1039 | ret = -1; |
1040 | goto done; | |
1041 | } | |
1042 | /* Write the upper 32bits of the physical address to REG_CMD_ADDR_HI */ | |
1043 | if (mwifiex_write_reg(adapter, REG_CMD_ADDR_HI, | |
f57c1edc YAP |
1044 | (u32)((u64)*cmd_buf_pa >> 32))) { |
1045 | dev_err(adapter->dev, | |
1046 | "Failed to write download cmd to boot code.\n"); | |
d930faee AK |
1047 | ret = -1; |
1048 | goto done; | |
1049 | } | |
1050 | ||
1051 | /* Write the command length to REG_CMD_SIZE */ | |
f57c1edc YAP |
1052 | if (mwifiex_write_reg(adapter, REG_CMD_SIZE, card->cmd_buf->len)) { |
1053 | dev_err(adapter->dev, | |
1054 | "Failed to write cmd len to REG_CMD_SIZE\n"); | |
d930faee AK |
1055 | ret = -1; |
1056 | goto done; | |
1057 | } | |
1058 | ||
1059 | /* Ring the door bell */ | |
1060 | if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT, | |
1061 | CPU_INTR_DOOR_BELL)) { | |
f57c1edc YAP |
1062 | dev_err(adapter->dev, |
1063 | "Failed to assert door-bell intr\n"); | |
d930faee AK |
1064 | ret = -1; |
1065 | goto done; | |
1066 | } | |
1067 | ||
1068 | done: | |
1069 | if (ret) | |
1070 | adapter->cmd_sent = false; | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * This function handles command complete interrupt | |
1077 | */ | |
1078 | static int mwifiex_pcie_process_cmd_complete(struct mwifiex_adapter *adapter) | |
1079 | { | |
1080 | struct pcie_service_card *card = adapter->card; | |
f57c1edc | 1081 | struct sk_buff *skb = card->cmdrsp_buf; |
d930faee AK |
1082 | int count = 0; |
1083 | ||
1084 | dev_dbg(adapter->dev, "info: Rx CMD Response\n"); | |
1085 | ||
1086 | if (!adapter->curr_cmd) { | |
f57c1edc | 1087 | skb_pull(skb, INTF_HEADER_LEN); |
d930faee | 1088 | if (adapter->ps_state == PS_STATE_SLEEP_CFM) { |
f57c1edc YAP |
1089 | mwifiex_process_sleep_confirm_resp(adapter, skb->data, |
1090 | skb->len); | |
d930faee AK |
1091 | while (mwifiex_pcie_ok_to_access_hw(adapter) && |
1092 | (count++ < 10)) | |
e7891ba2 | 1093 | usleep_range(50, 60); |
d930faee | 1094 | } else { |
f57c1edc YAP |
1095 | dev_err(adapter->dev, |
1096 | "There is no command but got cmdrsp\n"); | |
d930faee | 1097 | } |
f57c1edc YAP |
1098 | memcpy(adapter->upld_buf, skb->data, |
1099 | min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER, skb->len)); | |
1100 | skb_push(skb, INTF_HEADER_LEN); | |
d930faee | 1101 | } else if (mwifiex_pcie_ok_to_access_hw(adapter)) { |
f57c1edc YAP |
1102 | skb_pull(skb, INTF_HEADER_LEN); |
1103 | adapter->curr_cmd->resp_skb = skb; | |
d930faee AK |
1104 | adapter->cmd_resp_received = true; |
1105 | /* Take the pointer and set it to CMD node and will | |
1106 | return in the response complete callback */ | |
1107 | card->cmdrsp_buf = NULL; | |
1108 | ||
1109 | /* Clear the cmd-rsp buffer address in scratch registers. This | |
1110 | will prevent firmware from writing to the same response | |
1111 | buffer again. */ | |
1112 | if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_LO, 0)) { | |
f57c1edc YAP |
1113 | dev_err(adapter->dev, |
1114 | "cmd_done: failed to clear cmd_rsp_addr_lo\n"); | |
d930faee AK |
1115 | return -1; |
1116 | } | |
1117 | /* Write the upper 32bits of the cmdrsp buffer physical | |
1118 | address */ | |
1119 | if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_HI, 0)) { | |
f57c1edc YAP |
1120 | dev_err(adapter->dev, |
1121 | "cmd_done: failed to clear cmd_rsp_addr_hi\n"); | |
d930faee AK |
1122 | return -1; |
1123 | } | |
1124 | } | |
1125 | ||
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | /* | |
1130 | * Command Response processing complete handler | |
1131 | */ | |
1132 | static int mwifiex_pcie_cmdrsp_complete(struct mwifiex_adapter *adapter, | |
1133 | struct sk_buff *skb) | |
1134 | { | |
1135 | struct pcie_service_card *card = adapter->card; | |
1136 | ||
1137 | if (skb) { | |
1138 | card->cmdrsp_buf = skb; | |
1139 | skb_push(card->cmdrsp_buf, INTF_HEADER_LEN); | |
1140 | } | |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * This function handles firmware event ready interrupt | |
1147 | */ | |
1148 | static int mwifiex_pcie_process_event_ready(struct mwifiex_adapter *adapter) | |
1149 | { | |
1150 | struct pcie_service_card *card = adapter->card; | |
1151 | u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK; | |
1152 | u32 wrptr, event; | |
1153 | ||
1154 | if (adapter->event_received) { | |
f57c1edc YAP |
1155 | dev_dbg(adapter->dev, "info: Event being processed, " |
1156 | "do not process this interrupt just yet\n"); | |
d930faee AK |
1157 | return 0; |
1158 | } | |
1159 | ||
1160 | if (rdptr >= MWIFIEX_MAX_EVT_BD) { | |
1161 | dev_dbg(adapter->dev, "info: Invalid read pointer...\n"); | |
1162 | return -1; | |
1163 | } | |
1164 | ||
1165 | /* Read the event ring write pointer set by firmware */ | |
1166 | if (mwifiex_read_reg(adapter, REG_EVTBD_WRPTR, &wrptr)) { | |
f57c1edc YAP |
1167 | dev_err(adapter->dev, |
1168 | "EventReady: failed to read REG_EVTBD_WRPTR\n"); | |
d930faee AK |
1169 | return -1; |
1170 | } | |
1171 | ||
1172 | dev_dbg(adapter->dev, "info: EventReady: Initial <Rd: 0x%x, Wr: 0x%x>", | |
f57c1edc YAP |
1173 | card->evtbd_rdptr, wrptr); |
1174 | if (((wrptr & MWIFIEX_EVTBD_MASK) != (card->evtbd_rdptr | |
1175 | & MWIFIEX_EVTBD_MASK)) || | |
d930faee AK |
1176 | ((wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) == |
1177 | (card->evtbd_rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) { | |
1178 | struct sk_buff *skb_cmd; | |
1179 | __le16 data_len = 0; | |
1180 | u16 evt_len; | |
1181 | ||
1182 | dev_dbg(adapter->dev, "info: Read Index: %d\n", rdptr); | |
1183 | skb_cmd = card->evt_buf_list[rdptr]; | |
1184 | /* Take the pointer and set it to event pointer in adapter | |
1185 | and will return back after event handling callback */ | |
1186 | card->evt_buf_list[rdptr] = NULL; | |
1187 | card->evtbd_ring[rdptr]->paddr = 0; | |
1188 | card->evtbd_ring[rdptr]->len = 0; | |
1189 | card->evtbd_ring[rdptr]->flags = 0; | |
1190 | ||
1191 | event = *(u32 *) &skb_cmd->data[INTF_HEADER_LEN]; | |
1192 | adapter->event_cause = event; | |
1193 | /* The first 4bytes will be the event transfer header | |
1194 | len is 2 bytes followed by type which is 2 bytes */ | |
1195 | memcpy(&data_len, skb_cmd->data, sizeof(__le16)); | |
1196 | evt_len = le16_to_cpu(data_len); | |
1197 | ||
1198 | skb_pull(skb_cmd, INTF_HEADER_LEN); | |
1199 | dev_dbg(adapter->dev, "info: Event length: %d\n", evt_len); | |
1200 | ||
1201 | if ((evt_len > 0) && (evt_len < MAX_EVENT_SIZE)) | |
1202 | memcpy(adapter->event_body, skb_cmd->data + | |
1203 | MWIFIEX_EVENT_HEADER_LEN, evt_len - | |
1204 | MWIFIEX_EVENT_HEADER_LEN); | |
1205 | ||
1206 | adapter->event_received = true; | |
1207 | adapter->event_skb = skb_cmd; | |
1208 | ||
1209 | /* Do not update the event read pointer here, wait till the | |
1210 | buffer is released. This is just to make things simpler, | |
1211 | we need to find a better method of managing these buffers. | |
1212 | */ | |
1213 | } | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Event processing complete handler | |
1220 | */ | |
1221 | static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter, | |
1222 | struct sk_buff *skb) | |
1223 | { | |
1224 | struct pcie_service_card *card = adapter->card; | |
1225 | int ret = 0; | |
1226 | u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK; | |
1227 | u32 wrptr; | |
1228 | phys_addr_t *buf_pa; | |
1229 | ||
1230 | if (!skb) | |
1231 | return 0; | |
1232 | ||
1eb54c8a | 1233 | if (rdptr >= MWIFIEX_MAX_EVT_BD) { |
d930faee | 1234 | dev_err(adapter->dev, "event_complete: Invalid rdptr 0x%x\n", |
f57c1edc | 1235 | rdptr); |
8c53e42d | 1236 | return -EINVAL; |
1eb54c8a | 1237 | } |
d930faee AK |
1238 | |
1239 | /* Read the event ring write pointer set by firmware */ | |
1240 | if (mwifiex_read_reg(adapter, REG_EVTBD_WRPTR, &wrptr)) { | |
f57c1edc YAP |
1241 | dev_err(adapter->dev, |
1242 | "event_complete: failed to read REG_EVTBD_WRPTR\n"); | |
8c53e42d | 1243 | return -1; |
d930faee AK |
1244 | } |
1245 | ||
1246 | if (!card->evt_buf_list[rdptr]) { | |
1247 | skb_push(skb, INTF_HEADER_LEN); | |
1248 | card->evt_buf_list[rdptr] = skb; | |
1249 | buf_pa = MWIFIEX_SKB_PACB(skb); | |
1250 | card->evtbd_ring[rdptr]->paddr = *buf_pa; | |
1251 | card->evtbd_ring[rdptr]->len = (u16)skb->len; | |
1252 | card->evtbd_ring[rdptr]->flags = 0; | |
1253 | skb = NULL; | |
1254 | } else { | |
f57c1edc YAP |
1255 | dev_dbg(adapter->dev, |
1256 | "info: ERROR: buf still valid at index %d, <%p, %p>\n", | |
1257 | rdptr, card->evt_buf_list[rdptr], skb); | |
d930faee AK |
1258 | } |
1259 | ||
1260 | if ((++card->evtbd_rdptr & MWIFIEX_EVTBD_MASK) == MWIFIEX_MAX_EVT_BD) { | |
1261 | card->evtbd_rdptr = ((card->evtbd_rdptr & | |
1262 | MWIFIEX_BD_FLAG_ROLLOVER_IND) ^ | |
1263 | MWIFIEX_BD_FLAG_ROLLOVER_IND); | |
1264 | } | |
1265 | ||
1266 | dev_dbg(adapter->dev, "info: Updated <Rd: 0x%x, Wr: 0x%x>", | |
f57c1edc | 1267 | card->evtbd_rdptr, wrptr); |
d930faee AK |
1268 | |
1269 | /* Write the event ring read pointer in to REG_EVTBD_RDPTR */ | |
1270 | if (mwifiex_write_reg(adapter, REG_EVTBD_RDPTR, card->evtbd_rdptr)) { | |
f57c1edc YAP |
1271 | dev_err(adapter->dev, |
1272 | "event_complete: failed to read REG_EVTBD_RDPTR\n"); | |
8c53e42d | 1273 | return -1; |
d930faee AK |
1274 | } |
1275 | ||
d930faee AK |
1276 | dev_dbg(adapter->dev, "info: Check Events Again\n"); |
1277 | ret = mwifiex_pcie_process_event_ready(adapter); | |
1278 | ||
1279 | return ret; | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * This function downloads the firmware to the card. | |
1284 | * | |
1285 | * Firmware is downloaded to the card in blocks. Every block download | |
1286 | * is tested for CRC errors, and retried a number of times before | |
1287 | * returning failure. | |
1288 | */ | |
1289 | static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter, | |
1290 | struct mwifiex_fw_image *fw) | |
1291 | { | |
1292 | int ret; | |
1293 | u8 *firmware = fw->fw_buf; | |
1294 | u32 firmware_len = fw->fw_len; | |
1295 | u32 offset = 0; | |
1296 | struct sk_buff *skb; | |
1297 | u32 txlen, tx_blocks = 0, tries, len; | |
1298 | u32 block_retry_cnt = 0; | |
1299 | ||
1300 | if (!adapter) { | |
1301 | pr_err("adapter structure is not valid\n"); | |
1302 | return -1; | |
1303 | } | |
1304 | ||
1305 | if (!firmware || !firmware_len) { | |
f57c1edc YAP |
1306 | dev_err(adapter->dev, |
1307 | "No firmware image found! Terminating download\n"); | |
d930faee AK |
1308 | return -1; |
1309 | } | |
1310 | ||
1311 | dev_dbg(adapter->dev, "info: Downloading FW image (%d bytes)\n", | |
f57c1edc | 1312 | firmware_len); |
d930faee AK |
1313 | |
1314 | if (mwifiex_pcie_disable_host_int(adapter)) { | |
f57c1edc YAP |
1315 | dev_err(adapter->dev, |
1316 | "%s: Disabling interrupts failed.\n", __func__); | |
d930faee AK |
1317 | return -1; |
1318 | } | |
1319 | ||
1320 | skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE); | |
1321 | if (!skb) { | |
1322 | ret = -ENOMEM; | |
1323 | goto done; | |
1324 | } | |
1325 | mwifiex_update_sk_buff_pa(skb); | |
1326 | ||
1327 | /* Perform firmware data transfer */ | |
1328 | do { | |
1329 | u32 ireg_intr = 0; | |
1330 | ||
1331 | /* More data? */ | |
1332 | if (offset >= firmware_len) | |
1333 | break; | |
1334 | ||
1335 | for (tries = 0; tries < MAX_POLL_TRIES; tries++) { | |
1336 | ret = mwifiex_read_reg(adapter, PCIE_SCRATCH_2_REG, | |
1337 | &len); | |
1338 | if (ret) { | |
f57c1edc YAP |
1339 | dev_warn(adapter->dev, |
1340 | "Failed reading len from boot code\n"); | |
d930faee AK |
1341 | goto done; |
1342 | } | |
1343 | if (len) | |
1344 | break; | |
e7891ba2 | 1345 | usleep_range(10, 20); |
d930faee AK |
1346 | } |
1347 | ||
1348 | if (!len) { | |
1349 | break; | |
1350 | } else if (len > MWIFIEX_UPLD_SIZE) { | |
1351 | pr_err("FW download failure @ %d, invalid length %d\n", | |
f57c1edc | 1352 | offset, len); |
d930faee AK |
1353 | ret = -1; |
1354 | goto done; | |
1355 | } | |
1356 | ||
1357 | txlen = len; | |
1358 | ||
1359 | if (len & BIT(0)) { | |
1360 | block_retry_cnt++; | |
1361 | if (block_retry_cnt > MAX_WRITE_IOMEM_RETRY) { | |
1362 | pr_err("FW download failure @ %d, over max " | |
1363 | "retry count\n", offset); | |
1364 | ret = -1; | |
1365 | goto done; | |
1366 | } | |
1367 | dev_err(adapter->dev, "FW CRC error indicated by the " | |
f57c1edc YAP |
1368 | "helper: len = 0x%04X, txlen = %d\n", |
1369 | len, txlen); | |
d930faee AK |
1370 | len &= ~BIT(0); |
1371 | /* Setting this to 0 to resend from same offset */ | |
1372 | txlen = 0; | |
1373 | } else { | |
1374 | block_retry_cnt = 0; | |
1375 | /* Set blocksize to transfer - checking for | |
1376 | last block */ | |
1377 | if (firmware_len - offset < txlen) | |
1378 | txlen = firmware_len - offset; | |
1379 | ||
1380 | dev_dbg(adapter->dev, "."); | |
1381 | ||
f57c1edc YAP |
1382 | tx_blocks = (txlen + |
1383 | MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD - 1) / | |
1384 | MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD; | |
d930faee AK |
1385 | |
1386 | /* Copy payload to buffer */ | |
1387 | memmove(skb->data, &firmware[offset], txlen); | |
1388 | } | |
1389 | ||
1390 | skb_put(skb, MWIFIEX_UPLD_SIZE - skb->len); | |
1391 | skb_trim(skb, tx_blocks * MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD); | |
1392 | ||
1393 | /* Send the boot command to device */ | |
1394 | if (mwifiex_pcie_send_boot_cmd(adapter, skb)) { | |
f57c1edc YAP |
1395 | dev_err(adapter->dev, |
1396 | "Failed to send firmware download command\n"); | |
d930faee AK |
1397 | ret = -1; |
1398 | goto done; | |
1399 | } | |
1400 | /* Wait for the command done interrupt */ | |
1401 | do { | |
1402 | if (mwifiex_read_reg(adapter, PCIE_CPU_INT_STATUS, | |
1403 | &ireg_intr)) { | |
1404 | dev_err(adapter->dev, "%s: Failed to read " | |
f57c1edc YAP |
1405 | "interrupt status during fw dnld.\n", |
1406 | __func__); | |
d930faee AK |
1407 | ret = -1; |
1408 | goto done; | |
1409 | } | |
1410 | } while ((ireg_intr & CPU_INTR_DOOR_BELL) == | |
1411 | CPU_INTR_DOOR_BELL); | |
1412 | offset += txlen; | |
1413 | } while (true); | |
1414 | ||
1415 | dev_dbg(adapter->dev, "info:\nFW download over, size %d bytes\n", | |
f57c1edc | 1416 | offset); |
d930faee AK |
1417 | |
1418 | ret = 0; | |
1419 | ||
1420 | done: | |
1421 | dev_kfree_skb_any(skb); | |
1422 | return ret; | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * This function checks the firmware status in card. | |
1427 | * | |
1428 | * The winner interface is also determined by this function. | |
1429 | */ | |
1430 | static int | |
1431 | mwifiex_check_fw_status(struct mwifiex_adapter *adapter, u32 poll_num) | |
1432 | { | |
1433 | int ret = 0; | |
1434 | u32 firmware_stat, winner_status; | |
1435 | u32 tries; | |
1436 | ||
1437 | /* Mask spurios interrupts */ | |
1438 | if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS_MASK, | |
f57c1edc | 1439 | HOST_INTR_MASK)) { |
d930faee AK |
1440 | dev_warn(adapter->dev, "Write register failed\n"); |
1441 | return -1; | |
1442 | } | |
1443 | ||
1444 | dev_dbg(adapter->dev, "Setting driver ready signature\n"); | |
1445 | if (mwifiex_write_reg(adapter, REG_DRV_READY, FIRMWARE_READY_PCIE)) { | |
f57c1edc YAP |
1446 | dev_err(adapter->dev, |
1447 | "Failed to write driver ready signature\n"); | |
d930faee AK |
1448 | return -1; |
1449 | } | |
1450 | ||
1451 | /* Wait for firmware initialization event */ | |
1452 | for (tries = 0; tries < poll_num; tries++) { | |
1453 | if (mwifiex_read_reg(adapter, PCIE_SCRATCH_3_REG, | |
1454 | &firmware_stat)) | |
1455 | ret = -1; | |
1456 | else | |
1457 | ret = 0; | |
1458 | if (ret) | |
1459 | continue; | |
1460 | if (firmware_stat == FIRMWARE_READY_PCIE) { | |
1461 | ret = 0; | |
1462 | break; | |
1463 | } else { | |
1464 | mdelay(100); | |
1465 | ret = -1; | |
1466 | } | |
1467 | } | |
1468 | ||
1469 | if (ret) { | |
1470 | if (mwifiex_read_reg(adapter, PCIE_SCRATCH_3_REG, | |
1471 | &winner_status)) | |
1472 | ret = -1; | |
1473 | else if (!winner_status) { | |
1474 | dev_err(adapter->dev, "PCI-E is the winner\n"); | |
1475 | adapter->winner = 1; | |
1476 | ret = -1; | |
1477 | } else { | |
f57c1edc YAP |
1478 | dev_err(adapter->dev, |
1479 | "PCI-E is not the winner <%#x,%d>, exit dnld\n", | |
1480 | ret, adapter->winner); | |
d930faee AK |
1481 | ret = 0; |
1482 | } | |
1483 | } | |
1484 | ||
1485 | return ret; | |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * This function reads the interrupt status from card. | |
1490 | */ | |
1491 | static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter) | |
1492 | { | |
1493 | u32 pcie_ireg; | |
1494 | unsigned long flags; | |
1495 | ||
1496 | if (!mwifiex_pcie_ok_to_access_hw(adapter)) | |
1497 | return; | |
1498 | ||
1499 | if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS, &pcie_ireg)) { | |
1500 | dev_warn(adapter->dev, "Read register failed\n"); | |
1501 | return; | |
1502 | } | |
1503 | ||
1504 | if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) { | |
1505 | ||
1506 | mwifiex_pcie_disable_host_int(adapter); | |
1507 | ||
1508 | /* Clear the pending interrupts */ | |
1509 | if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS, | |
1510 | ~pcie_ireg)) { | |
1511 | dev_warn(adapter->dev, "Write register failed\n"); | |
1512 | return; | |
1513 | } | |
1514 | spin_lock_irqsave(&adapter->int_lock, flags); | |
1515 | adapter->int_status |= pcie_ireg; | |
1516 | spin_unlock_irqrestore(&adapter->int_lock, flags); | |
1517 | ||
1518 | if (pcie_ireg & HOST_INTR_CMD_DONE) { | |
1519 | if ((adapter->ps_state == PS_STATE_SLEEP_CFM) || | |
1520 | (adapter->ps_state == PS_STATE_SLEEP)) { | |
1521 | mwifiex_pcie_enable_host_int(adapter); | |
1522 | if (mwifiex_write_reg(adapter, | |
f57c1edc YAP |
1523 | PCIE_CPU_INT_EVENT, |
1524 | CPU_INTR_SLEEP_CFM_DONE) | |
1525 | ) { | |
1526 | dev_warn(adapter->dev, | |
1527 | "Write register failed\n"); | |
d930faee AK |
1528 | return; |
1529 | ||
1530 | } | |
1531 | } | |
1532 | } else if (!adapter->pps_uapsd_mode && | |
1533 | adapter->ps_state == PS_STATE_SLEEP) { | |
1534 | /* Potentially for PCIe we could get other | |
1535 | * interrupts like shared. Don't change power | |
1536 | * state until cookie is set */ | |
1537 | if (mwifiex_pcie_ok_to_access_hw(adapter)) | |
1538 | adapter->ps_state = PS_STATE_AWAKE; | |
1539 | } | |
1540 | } | |
1541 | } | |
1542 | ||
1543 | /* | |
1544 | * Interrupt handler for PCIe root port | |
1545 | * | |
1546 | * This function reads the interrupt status from firmware and assigns | |
1547 | * the main process in workqueue which will handle the interrupt. | |
1548 | */ | |
1549 | static irqreturn_t mwifiex_pcie_interrupt(int irq, void *context) | |
1550 | { | |
1551 | struct pci_dev *pdev = (struct pci_dev *)context; | |
1552 | struct pcie_service_card *card; | |
1553 | struct mwifiex_adapter *adapter; | |
1554 | ||
1555 | if (!pdev) { | |
1556 | pr_debug("info: %s: pdev is NULL\n", (u8 *)pdev); | |
1557 | goto exit; | |
1558 | } | |
1559 | ||
1560 | card = (struct pcie_service_card *) pci_get_drvdata(pdev); | |
1561 | if (!card || !card->adapter) { | |
1562 | pr_debug("info: %s: card=%p adapter=%p\n", __func__, card, | |
f57c1edc | 1563 | card ? card->adapter : NULL); |
d930faee AK |
1564 | goto exit; |
1565 | } | |
1566 | adapter = card->adapter; | |
1567 | ||
1568 | if (adapter->surprise_removed) | |
1569 | goto exit; | |
1570 | ||
1571 | mwifiex_interrupt_status(adapter); | |
1572 | queue_work(adapter->workqueue, &adapter->main_work); | |
1573 | ||
1574 | exit: | |
1575 | return IRQ_HANDLED; | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | * This function checks the current interrupt status. | |
1580 | * | |
1581 | * The following interrupts are checked and handled by this function - | |
1582 | * - Data sent | |
1583 | * - Command sent | |
1584 | * - Command received | |
1585 | * - Packets received | |
1586 | * - Events received | |
1587 | * | |
1588 | * In case of Rx packets received, the packets are uploaded from card to | |
1589 | * host and processed accordingly. | |
1590 | */ | |
1591 | static int mwifiex_process_int_status(struct mwifiex_adapter *adapter) | |
1592 | { | |
1593 | int ret; | |
1594 | u32 pcie_ireg = 0; | |
1595 | unsigned long flags; | |
1596 | ||
1597 | spin_lock_irqsave(&adapter->int_lock, flags); | |
1598 | /* Clear out unused interrupts */ | |
1599 | adapter->int_status &= HOST_INTR_MASK; | |
1600 | spin_unlock_irqrestore(&adapter->int_lock, flags); | |
1601 | ||
1602 | while (adapter->int_status & HOST_INTR_MASK) { | |
1603 | if (adapter->int_status & HOST_INTR_DNLD_DONE) { | |
1604 | adapter->int_status &= ~HOST_INTR_DNLD_DONE; | |
1605 | if (adapter->data_sent) { | |
f57c1edc | 1606 | dev_dbg(adapter->dev, "info: DATA sent intr\n"); |
d930faee AK |
1607 | adapter->data_sent = false; |
1608 | } | |
1609 | } | |
1610 | if (adapter->int_status & HOST_INTR_UPLD_RDY) { | |
1611 | adapter->int_status &= ~HOST_INTR_UPLD_RDY; | |
1612 | dev_dbg(adapter->dev, "info: Rx DATA\n"); | |
1613 | ret = mwifiex_pcie_process_recv_data(adapter); | |
1614 | if (ret) | |
1615 | return ret; | |
1616 | } | |
1617 | if (adapter->int_status & HOST_INTR_EVENT_RDY) { | |
1618 | adapter->int_status &= ~HOST_INTR_EVENT_RDY; | |
1619 | dev_dbg(adapter->dev, "info: Rx EVENT\n"); | |
1620 | ret = mwifiex_pcie_process_event_ready(adapter); | |
1621 | if (ret) | |
1622 | return ret; | |
1623 | } | |
1624 | ||
1625 | if (adapter->int_status & HOST_INTR_CMD_DONE) { | |
1626 | adapter->int_status &= ~HOST_INTR_CMD_DONE; | |
1627 | if (adapter->cmd_sent) { | |
f57c1edc YAP |
1628 | dev_dbg(adapter->dev, |
1629 | "info: CMD sent Interrupt\n"); | |
d930faee AK |
1630 | adapter->cmd_sent = false; |
1631 | } | |
1632 | /* Handle command response */ | |
1633 | ret = mwifiex_pcie_process_cmd_complete(adapter); | |
1634 | if (ret) | |
1635 | return ret; | |
1636 | } | |
1637 | ||
1638 | if (mwifiex_pcie_ok_to_access_hw(adapter)) { | |
1639 | if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS, | |
1640 | &pcie_ireg)) { | |
f57c1edc YAP |
1641 | dev_warn(adapter->dev, |
1642 | "Read register failed\n"); | |
d930faee AK |
1643 | return -1; |
1644 | } | |
1645 | ||
1646 | if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) { | |
1647 | if (mwifiex_write_reg(adapter, | |
f57c1edc YAP |
1648 | PCIE_HOST_INT_STATUS, |
1649 | ~pcie_ireg)) { | |
1650 | dev_warn(adapter->dev, | |
1651 | "Write register failed\n"); | |
d930faee AK |
1652 | return -1; |
1653 | } | |
1654 | adapter->int_status |= pcie_ireg; | |
1655 | adapter->int_status &= HOST_INTR_MASK; | |
1656 | } | |
1657 | ||
1658 | } | |
1659 | } | |
1660 | dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n", | |
f57c1edc | 1661 | adapter->cmd_sent, adapter->data_sent); |
d930faee AK |
1662 | mwifiex_pcie_enable_host_int(adapter); |
1663 | ||
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | /* | |
1668 | * This function downloads data from driver to card. | |
1669 | * | |
1670 | * Both commands and data packets are transferred to the card by this | |
1671 | * function. | |
1672 | * | |
1673 | * This function adds the PCIE specific header to the front of the buffer | |
1674 | * before transferring. The header contains the length of the packet and | |
1675 | * the type. The firmware handles the packets based upon this set type. | |
1676 | */ | |
1677 | static int mwifiex_pcie_host_to_card(struct mwifiex_adapter *adapter, u8 type, | |
1678 | struct sk_buff *skb, | |
1679 | struct mwifiex_tx_param *tx_param) | |
1680 | { | |
fa161cb7 DC |
1681 | if (!skb) { |
1682 | dev_err(adapter->dev, "Passed NULL skb to %s\n", __func__); | |
d930faee AK |
1683 | return -1; |
1684 | } | |
1685 | ||
1686 | if (type == MWIFIEX_TYPE_DATA) | |
1687 | return mwifiex_pcie_send_data(adapter, skb); | |
1688 | else if (type == MWIFIEX_TYPE_CMD) | |
1689 | return mwifiex_pcie_send_cmd(adapter, skb); | |
1690 | ||
1691 | return 0; | |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * This function initializes the PCI-E host memory space, WCB rings, etc. | |
1696 | * | |
1697 | * The following initializations steps are followed - | |
1698 | * - Allocate TXBD ring buffers | |
1699 | * - Allocate RXBD ring buffers | |
1700 | * - Allocate event BD ring buffers | |
1701 | * - Allocate command response ring buffer | |
1702 | * - Allocate sleep cookie buffer | |
1703 | */ | |
1704 | static int mwifiex_pcie_init(struct mwifiex_adapter *adapter) | |
1705 | { | |
1706 | struct pcie_service_card *card = adapter->card; | |
1707 | int ret; | |
1708 | struct pci_dev *pdev = card->dev; | |
1709 | ||
1710 | pci_set_drvdata(pdev, card); | |
1711 | ||
1712 | ret = pci_enable_device(pdev); | |
1713 | if (ret) | |
1714 | goto err_enable_dev; | |
1715 | ||
1716 | pci_set_master(pdev); | |
1717 | ||
1718 | dev_dbg(adapter->dev, "try set_consistent_dma_mask(32)\n"); | |
1719 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); | |
1720 | if (ret) { | |
1721 | dev_err(adapter->dev, "set_dma_mask(32) failed\n"); | |
1722 | goto err_set_dma_mask; | |
1723 | } | |
1724 | ||
1725 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); | |
1726 | if (ret) { | |
1727 | dev_err(adapter->dev, "set_consistent_dma_mask(64) failed\n"); | |
1728 | goto err_set_dma_mask; | |
1729 | } | |
1730 | ||
1731 | ret = pci_request_region(pdev, 0, DRV_NAME); | |
1732 | if (ret) { | |
1733 | dev_err(adapter->dev, "req_reg(0) error\n"); | |
1734 | goto err_req_region0; | |
1735 | } | |
1736 | card->pci_mmap = pci_iomap(pdev, 0, 0); | |
1737 | if (!card->pci_mmap) { | |
1738 | dev_err(adapter->dev, "iomap(0) error\n"); | |
1739 | goto err_iomap0; | |
1740 | } | |
1741 | ret = pci_request_region(pdev, 2, DRV_NAME); | |
1742 | if (ret) { | |
1743 | dev_err(adapter->dev, "req_reg(2) error\n"); | |
1744 | goto err_req_region2; | |
1745 | } | |
1746 | card->pci_mmap1 = pci_iomap(pdev, 2, 0); | |
1747 | if (!card->pci_mmap1) { | |
1748 | dev_err(adapter->dev, "iomap(2) error\n"); | |
1749 | goto err_iomap2; | |
1750 | } | |
1751 | ||
f57c1edc YAP |
1752 | dev_dbg(adapter->dev, |
1753 | "PCI memory map Virt0: %p PCI memory map Virt2: %p\n", | |
1754 | card->pci_mmap, card->pci_mmap1); | |
d930faee AK |
1755 | |
1756 | card->cmdrsp_buf = NULL; | |
1757 | ret = mwifiex_pcie_create_txbd_ring(adapter); | |
1758 | if (ret) | |
1759 | goto err_cre_txbd; | |
1760 | ret = mwifiex_pcie_create_rxbd_ring(adapter); | |
1761 | if (ret) | |
1762 | goto err_cre_rxbd; | |
1763 | ret = mwifiex_pcie_create_evtbd_ring(adapter); | |
1764 | if (ret) | |
1765 | goto err_cre_evtbd; | |
1766 | ret = mwifiex_pcie_alloc_cmdrsp_buf(adapter); | |
1767 | if (ret) | |
1768 | goto err_alloc_cmdbuf; | |
1769 | ret = mwifiex_pcie_alloc_sleep_cookie_buf(adapter); | |
1770 | if (ret) | |
1771 | goto err_alloc_cookie; | |
1772 | ||
1773 | return ret; | |
1774 | ||
1775 | err_alloc_cookie: | |
1776 | mwifiex_pcie_delete_cmdrsp_buf(adapter); | |
1777 | err_alloc_cmdbuf: | |
1778 | mwifiex_pcie_delete_evtbd_ring(adapter); | |
1779 | err_cre_evtbd: | |
1780 | mwifiex_pcie_delete_rxbd_ring(adapter); | |
1781 | err_cre_rxbd: | |
1782 | mwifiex_pcie_delete_txbd_ring(adapter); | |
1783 | err_cre_txbd: | |
1784 | pci_iounmap(pdev, card->pci_mmap1); | |
1785 | err_iomap2: | |
1786 | pci_release_region(pdev, 2); | |
1787 | err_req_region2: | |
1788 | pci_iounmap(pdev, card->pci_mmap); | |
1789 | err_iomap0: | |
1790 | pci_release_region(pdev, 0); | |
1791 | err_req_region0: | |
1792 | err_set_dma_mask: | |
1793 | pci_disable_device(pdev); | |
1794 | err_enable_dev: | |
1795 | pci_set_drvdata(pdev, NULL); | |
1796 | return ret; | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * This function cleans up the allocated card buffers. | |
1801 | * | |
1802 | * The following are freed by this function - | |
1803 | * - TXBD ring buffers | |
1804 | * - RXBD ring buffers | |
1805 | * - Event BD ring buffers | |
1806 | * - Command response ring buffer | |
1807 | * - Sleep cookie buffer | |
1808 | */ | |
1809 | static void mwifiex_pcie_cleanup(struct mwifiex_adapter *adapter) | |
1810 | { | |
1811 | struct pcie_service_card *card = adapter->card; | |
1812 | struct pci_dev *pdev = card->dev; | |
1813 | ||
1814 | mwifiex_pcie_delete_sleep_cookie_buf(adapter); | |
1815 | mwifiex_pcie_delete_cmdrsp_buf(adapter); | |
1816 | mwifiex_pcie_delete_evtbd_ring(adapter); | |
1817 | mwifiex_pcie_delete_rxbd_ring(adapter); | |
1818 | mwifiex_pcie_delete_txbd_ring(adapter); | |
1819 | card->cmdrsp_buf = NULL; | |
1820 | ||
1821 | dev_dbg(adapter->dev, "Clearing driver ready signature\n"); | |
1822 | if (user_rmmod) { | |
1823 | if (mwifiex_write_reg(adapter, REG_DRV_READY, 0x00000000)) | |
f57c1edc YAP |
1824 | dev_err(adapter->dev, |
1825 | "Failed to write driver not-ready signature\n"); | |
d930faee AK |
1826 | } |
1827 | ||
1828 | if (pdev) { | |
1829 | pci_iounmap(pdev, card->pci_mmap); | |
1830 | pci_iounmap(pdev, card->pci_mmap1); | |
1831 | ||
1832 | pci_release_regions(pdev); | |
1833 | pci_disable_device(pdev); | |
1834 | pci_set_drvdata(pdev, NULL); | |
1835 | } | |
1836 | } | |
1837 | ||
1838 | /* | |
1839 | * This function registers the PCIE device. | |
1840 | * | |
1841 | * PCIE IRQ is claimed, block size is set and driver data is initialized. | |
1842 | */ | |
1843 | static int mwifiex_register_dev(struct mwifiex_adapter *adapter) | |
1844 | { | |
1845 | int ret; | |
1846 | struct pcie_service_card *card = adapter->card; | |
1847 | struct pci_dev *pdev = card->dev; | |
1848 | ||
1849 | /* save adapter pointer in card */ | |
1850 | card->adapter = adapter; | |
1851 | ||
1852 | ret = request_irq(pdev->irq, mwifiex_pcie_interrupt, IRQF_SHARED, | |
1853 | "MRVL_PCIE", pdev); | |
1854 | if (ret) { | |
1855 | pr_err("request_irq failed: ret=%d\n", ret); | |
1856 | adapter->card = NULL; | |
1857 | return -1; | |
1858 | } | |
1859 | ||
1860 | adapter->dev = &pdev->dev; | |
1861 | strcpy(adapter->fw_name, PCIE8766_DEFAULT_FW_NAME); | |
1862 | ||
1863 | return 0; | |
1864 | } | |
1865 | ||
1866 | /* | |
1867 | * This function unregisters the PCIE device. | |
1868 | * | |
1869 | * The PCIE IRQ is released, the function is disabled and driver | |
1870 | * data is set to null. | |
1871 | */ | |
1872 | static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter) | |
1873 | { | |
1874 | struct pcie_service_card *card = adapter->card; | |
1875 | ||
1876 | if (card) { | |
1877 | dev_dbg(adapter->dev, "%s(): calling free_irq()\n", __func__); | |
1878 | free_irq(card->dev->irq, card->dev); | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | static struct mwifiex_if_ops pcie_ops = { | |
1883 | .init_if = mwifiex_pcie_init, | |
1884 | .cleanup_if = mwifiex_pcie_cleanup, | |
1885 | .check_fw_status = mwifiex_check_fw_status, | |
1886 | .prog_fw = mwifiex_prog_fw_w_helper, | |
1887 | .register_dev = mwifiex_register_dev, | |
1888 | .unregister_dev = mwifiex_unregister_dev, | |
1889 | .enable_int = mwifiex_pcie_enable_host_int, | |
1890 | .process_int_status = mwifiex_process_int_status, | |
1891 | .host_to_card = mwifiex_pcie_host_to_card, | |
1892 | .wakeup = mwifiex_pm_wakeup_card, | |
1893 | .wakeup_complete = mwifiex_pm_wakeup_card_complete, | |
1894 | ||
1895 | /* PCIE specific */ | |
1896 | .cmdrsp_complete = mwifiex_pcie_cmdrsp_complete, | |
1897 | .event_complete = mwifiex_pcie_event_complete, | |
1898 | .update_mp_end_port = NULL, | |
1899 | .cleanup_mpa_buf = NULL, | |
1900 | }; | |
1901 | ||
1902 | /* | |
1903 | * This function initializes the PCIE driver module. | |
1904 | * | |
1905 | * This initiates the semaphore and registers the device with | |
1906 | * PCIE bus. | |
1907 | */ | |
1908 | static int mwifiex_pcie_init_module(void) | |
1909 | { | |
1910 | int ret; | |
1911 | ||
1912 | pr_debug("Marvell 8766 PCIe Driver\n"); | |
1913 | ||
1914 | sema_init(&add_remove_card_sem, 1); | |
1915 | ||
1916 | /* Clear the flag in case user removes the card. */ | |
1917 | user_rmmod = 0; | |
1918 | ||
1919 | ret = pci_register_driver(&mwifiex_pcie); | |
1920 | if (ret) | |
1921 | pr_err("Driver register failed!\n"); | |
1922 | else | |
1923 | pr_debug("info: Driver registered successfully!\n"); | |
1924 | ||
1925 | return ret; | |
1926 | } | |
1927 | ||
1928 | /* | |
1929 | * This function cleans up the PCIE driver. | |
1930 | * | |
1931 | * The following major steps are followed for cleanup - | |
1932 | * - Resume the device if its suspended | |
1933 | * - Disconnect the device if connected | |
1934 | * - Shutdown the firmware | |
1935 | * - Unregister the device from PCIE bus. | |
1936 | */ | |
1937 | static void mwifiex_pcie_cleanup_module(void) | |
1938 | { | |
1939 | if (!down_interruptible(&add_remove_card_sem)) | |
1940 | up(&add_remove_card_sem); | |
1941 | ||
1942 | /* Set the flag as user is removing this module. */ | |
1943 | user_rmmod = 1; | |
1944 | ||
1945 | pci_unregister_driver(&mwifiex_pcie); | |
1946 | } | |
1947 | ||
1948 | module_init(mwifiex_pcie_init_module); | |
1949 | module_exit(mwifiex_pcie_cleanup_module); | |
1950 | ||
1951 | MODULE_AUTHOR("Marvell International Ltd."); | |
1952 | MODULE_DESCRIPTION("Marvell WiFi-Ex PCI-Express Driver version " PCIE_VERSION); | |
1953 | MODULE_VERSION(PCIE_VERSION); | |
1954 | MODULE_LICENSE("GPL v2"); | |
1955 | MODULE_FIRMWARE("mrvl/pcie8766_uapsta.bin"); |