2 * Marvell Wireless LAN device driver: PCIE specific handling
4 * Copyright (C) 2011, Marvell International Ltd.
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.
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.
20 #include <linux/firmware.h>
31 #define PCIE_VERSION "1.0"
32 #define DRV_NAME "Marvell mwifiex PCIe"
36 static struct mwifiex_if_ops pcie_ops;
38 static struct semaphore add_remove_card_sem;
41 mwifiex_map_pci_memory(struct mwifiex_adapter *adapter, struct sk_buff *skb,
44 struct pcie_service_card *card = adapter->card;
47 buf_pa = pci_map_single(card->dev, skb->data, size, flags);
48 if (pci_dma_mapping_error(card->dev, buf_pa)) {
49 dev_err(adapter->dev, "failed to map pci memory!\n");
52 memcpy(skb->cb, &buf_pa, sizeof(dma_addr_t));
57 * This function reads sleep cookie and checks if FW is ready
59 static bool mwifiex_pcie_ok_to_access_hw(struct mwifiex_adapter *adapter)
62 struct pcie_service_card *card = adapter->card;
63 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
65 if (!reg->sleep_cookie)
68 if (card->sleep_cookie_vbase) {
69 cookie_addr = (u32 *)card->sleep_cookie_vbase;
70 dev_dbg(adapter->dev, "info: ACCESS_HW: sleep cookie=0x%x\n",
72 if (*cookie_addr == FW_AWAKE_COOKIE)
81 * Kernel needs to suspend all functions separately. Therefore all
82 * registered functions must have drivers with suspend and resume
83 * methods. Failing that the kernel simply removes the whole card.
85 * If already not suspended, this function allocates and sends a host
86 * sleep activate request to the firmware and turns off the traffic.
88 static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state)
90 struct mwifiex_adapter *adapter;
91 struct pcie_service_card *card;
95 card = (struct pcie_service_card *) pci_get_drvdata(pdev);
96 if (!card || !card->adapter) {
97 pr_err("Card or adapter structure is not valid\n");
101 pr_err("PCIE device is not specified\n");
105 adapter = card->adapter;
107 hs_actived = mwifiex_enable_hs(adapter);
109 /* Indicate device suspended */
110 adapter->is_suspended = true;
116 * Kernel needs to suspend all functions separately. Therefore all
117 * registered functions must have drivers with suspend and resume
118 * methods. Failing that the kernel simply removes the whole card.
120 * If already not resumed, this function turns on the traffic and
121 * sends a host sleep cancel request to the firmware.
123 static int mwifiex_pcie_resume(struct pci_dev *pdev)
125 struct mwifiex_adapter *adapter;
126 struct pcie_service_card *card;
129 card = (struct pcie_service_card *) pci_get_drvdata(pdev);
130 if (!card || !card->adapter) {
131 pr_err("Card or adapter structure is not valid\n");
135 pr_err("PCIE device is not specified\n");
139 adapter = card->adapter;
141 if (!adapter->is_suspended) {
142 dev_warn(adapter->dev, "Device already resumed\n");
146 adapter->is_suspended = false;
148 mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
156 * This function probes an mwifiex device and registers it. It allocates
157 * the card structure, enables PCIE function number and initiates the
158 * device registration and initialization procedure by adding a logical
161 static int mwifiex_pcie_probe(struct pci_dev *pdev,
162 const struct pci_device_id *ent)
164 struct pcie_service_card *card;
166 pr_debug("info: vendor=0x%4.04X device=0x%4.04X rev=%d\n",
167 pdev->vendor, pdev->device, pdev->revision);
169 card = kzalloc(sizeof(struct pcie_service_card), GFP_KERNEL);
175 if (ent->driver_data) {
176 struct mwifiex_pcie_device *data = (void *)ent->driver_data;
177 card->pcie.firmware = data->firmware;
178 card->pcie.reg = data->reg;
179 card->pcie.blksz_fw_dl = data->blksz_fw_dl;
182 if (mwifiex_add_card(card, &add_remove_card_sem, &pcie_ops,
184 pr_err("%s failed\n", __func__);
193 * This function removes the interface and frees up the card structure.
195 static void mwifiex_pcie_remove(struct pci_dev *pdev)
197 struct pcie_service_card *card;
198 struct mwifiex_adapter *adapter;
199 struct mwifiex_private *priv;
202 card = pci_get_drvdata(pdev);
206 adapter = card->adapter;
207 if (!adapter || !adapter->priv_num)
210 /* In case driver is removed when asynchronous FW load is in progress */
211 wait_for_completion(&adapter->fw_load);
215 if (adapter->is_suspended)
216 mwifiex_pcie_resume(pdev);
219 for (i = 0; i < adapter->priv_num; i++)
220 if ((GET_BSS_ROLE(adapter->priv[i]) ==
221 MWIFIEX_BSS_ROLE_STA) &&
222 adapter->priv[i]->media_connected)
223 mwifiex_deauthenticate(adapter->priv[i], NULL);
225 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
227 mwifiex_disable_auto_ds(priv);
229 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
232 mwifiex_remove_card(card->adapter, &add_remove_card_sem);
236 static DEFINE_PCI_DEVICE_TABLE(mwifiex_ids) = {
238 PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8766P,
239 PCI_ANY_ID, PCI_ANY_ID, 0, 0,
240 .driver_data = (unsigned long) &mwifiex_pcie8766,
243 PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8897,
244 PCI_ANY_ID, PCI_ANY_ID, 0, 0,
245 .driver_data = (unsigned long) &mwifiex_pcie8897,
250 MODULE_DEVICE_TABLE(pci, mwifiex_ids);
252 /* PCI Device Driver */
253 static struct pci_driver __refdata mwifiex_pcie = {
254 .name = "mwifiex_pcie",
255 .id_table = mwifiex_ids,
256 .probe = mwifiex_pcie_probe,
257 .remove = mwifiex_pcie_remove,
259 /* Power Management Hooks */
260 .suspend = mwifiex_pcie_suspend,
261 .resume = mwifiex_pcie_resume,
266 * This function writes data into PCIE card register.
268 static int mwifiex_write_reg(struct mwifiex_adapter *adapter, int reg, u32 data)
270 struct pcie_service_card *card = adapter->card;
272 iowrite32(data, card->pci_mmap1 + reg);
278 * This function reads data from PCIE card register.
280 static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data)
282 struct pcie_service_card *card = adapter->card;
284 *data = ioread32(card->pci_mmap1 + reg);
290 * This function adds delay loop to ensure FW is awake before proceeding.
292 static void mwifiex_pcie_dev_wakeup_delay(struct mwifiex_adapter *adapter)
296 while (mwifiex_pcie_ok_to_access_hw(adapter)) {
298 usleep_range(10, 20);
307 /* This function wakes up the card by reading fw_status register. */
308 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
311 struct pcie_service_card *card = adapter->card;
312 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
314 dev_dbg(adapter->dev, "event: Wakeup device...\n");
316 if (reg->sleep_cookie)
317 mwifiex_pcie_dev_wakeup_delay(adapter);
319 /* Reading fw_status register will wakeup device */
320 if (mwifiex_read_reg(adapter, reg->fw_status, &fw_status)) {
321 dev_warn(adapter->dev, "Reading fw_status register failed\n");
325 if (reg->sleep_cookie) {
326 mwifiex_pcie_dev_wakeup_delay(adapter);
327 dev_dbg(adapter->dev, "PCIE wakeup: Setting PS_STATE_AWAKE\n");
328 adapter->ps_state = PS_STATE_AWAKE;
335 * This function is called after the card has woken up.
337 * The card configuration register is reset.
339 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
341 dev_dbg(adapter->dev, "cmd: Wakeup device completed\n");
347 * This function disables the host interrupt.
349 * The host interrupt mask is read, the disable bit is reset and
350 * written back to the card host interrupt mask register.
352 static int mwifiex_pcie_disable_host_int(struct mwifiex_adapter *adapter)
354 if (mwifiex_pcie_ok_to_access_hw(adapter)) {
355 if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK,
357 dev_warn(adapter->dev, "Disable host interrupt failed\n");
366 * This function enables the host interrupt.
368 * The host interrupt enable mask is written to the card
369 * host interrupt mask register.
371 static int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter)
373 if (mwifiex_pcie_ok_to_access_hw(adapter)) {
374 /* Simply write the mask to the register */
375 if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK,
377 dev_warn(adapter->dev, "Enable host interrupt failed\n");
386 * This function initializes TX buffer ring descriptors
388 static int mwifiex_init_txq_ring(struct mwifiex_adapter *adapter)
390 struct pcie_service_card *card = adapter->card;
391 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
392 struct mwifiex_pcie_buf_desc *desc;
393 struct mwifiex_pfu_buf_desc *desc2;
396 for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
397 card->tx_buf_list[i] = NULL;
398 if (reg->pfu_enabled) {
399 card->txbd_ring[i] = (void *)card->txbd_ring_vbase +
400 (sizeof(*desc2) * i);
401 desc2 = card->txbd_ring[i];
402 memset(desc2, 0, sizeof(*desc2));
404 card->txbd_ring[i] = (void *)card->txbd_ring_vbase +
406 desc = card->txbd_ring[i];
407 memset(desc, 0, sizeof(*desc));
414 /* This function initializes RX buffer ring descriptors. Each SKB is allocated
415 * here and after mapping PCI memory, its physical address is assigned to
416 * PCIE Rx buffer descriptor's physical address.
418 static int mwifiex_init_rxq_ring(struct mwifiex_adapter *adapter)
420 struct pcie_service_card *card = adapter->card;
421 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
423 struct mwifiex_pcie_buf_desc *desc;
424 struct mwifiex_pfu_buf_desc *desc2;
428 for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
429 /* Allocate skb here so that firmware can DMA data from it */
430 skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE);
432 dev_err(adapter->dev,
433 "Unable to allocate skb for RX ring.\n");
434 kfree(card->rxbd_ring_vbase);
438 if (mwifiex_map_pci_memory(adapter, skb,
439 MWIFIEX_RX_DATA_BUF_SIZE,
443 MWIFIEX_SKB_PACB(skb, &buf_pa);
445 dev_dbg(adapter->dev,
446 "info: RX ring: skb=%p len=%d data=%p buf_pa=%#x:%x\n",
447 skb, skb->len, skb->data, (u32)buf_pa,
448 (u32)((u64)buf_pa >> 32));
450 card->rx_buf_list[i] = skb;
451 if (reg->pfu_enabled) {
452 card->rxbd_ring[i] = (void *)card->rxbd_ring_vbase +
453 (sizeof(*desc2) * i);
454 desc2 = card->rxbd_ring[i];
455 desc2->paddr = buf_pa;
456 desc2->len = (u16)skb->len;
457 desc2->frag_len = (u16)skb->len;
458 desc2->flags = reg->ring_flag_eop | reg->ring_flag_sop;
461 card->rxbd_ring[i] = (void *)(card->rxbd_ring_vbase +
462 (sizeof(*desc) * i));
463 desc = card->rxbd_ring[i];
464 desc->paddr = buf_pa;
465 desc->len = (u16)skb->len;
473 /* This function initializes event buffer ring descriptors. Each SKB is
474 * allocated here and after mapping PCI memory, its physical address is assigned
475 * to PCIE Rx buffer descriptor's physical address
477 static int mwifiex_pcie_init_evt_ring(struct mwifiex_adapter *adapter)
479 struct pcie_service_card *card = adapter->card;
480 struct mwifiex_evt_buf_desc *desc;
485 for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) {
486 /* Allocate skb here so that firmware can DMA data from it */
487 skb = dev_alloc_skb(MAX_EVENT_SIZE);
489 dev_err(adapter->dev,
490 "Unable to allocate skb for EVENT buf.\n");
491 kfree(card->evtbd_ring_vbase);
494 skb_put(skb, MAX_EVENT_SIZE);
496 if (mwifiex_map_pci_memory(adapter, skb, MAX_EVENT_SIZE,
500 MWIFIEX_SKB_PACB(skb, &buf_pa);
502 dev_dbg(adapter->dev,
503 "info: EVT ring: skb=%p len=%d data=%p buf_pa=%#x:%x\n",
504 skb, skb->len, skb->data, (u32)buf_pa,
505 (u32)((u64)buf_pa >> 32));
507 card->evt_buf_list[i] = skb;
508 card->evtbd_ring[i] = (void *)(card->evtbd_ring_vbase +
509 (sizeof(*desc) * i));
510 desc = card->evtbd_ring[i];
511 desc->paddr = buf_pa;
512 desc->len = (u16)skb->len;
519 /* This function cleans up TX buffer rings. If any of the buffer list has valid
520 * SKB address, associated SKB is freed.
522 static void mwifiex_cleanup_txq_ring(struct mwifiex_adapter *adapter)
524 struct pcie_service_card *card = adapter->card;
525 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
527 struct mwifiex_pcie_buf_desc *desc;
528 struct mwifiex_pfu_buf_desc *desc2;
531 for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
532 if (reg->pfu_enabled) {
533 desc2 = card->txbd_ring[i];
534 if (card->tx_buf_list[i]) {
535 skb = card->tx_buf_list[i];
536 pci_unmap_single(card->dev, desc2->paddr,
537 skb->len, PCI_DMA_TODEVICE);
538 dev_kfree_skb_any(skb);
540 memset(desc2, 0, sizeof(*desc2));
542 desc = card->txbd_ring[i];
543 if (card->tx_buf_list[i]) {
544 skb = card->tx_buf_list[i];
545 pci_unmap_single(card->dev, desc->paddr,
546 skb->len, PCI_DMA_TODEVICE);
547 dev_kfree_skb_any(skb);
549 memset(desc, 0, sizeof(*desc));
551 card->tx_buf_list[i] = NULL;
557 /* This function cleans up RX buffer rings. If any of the buffer list has valid
558 * SKB address, associated SKB is freed.
560 static void mwifiex_cleanup_rxq_ring(struct mwifiex_adapter *adapter)
562 struct pcie_service_card *card = adapter->card;
563 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
564 struct mwifiex_pcie_buf_desc *desc;
565 struct mwifiex_pfu_buf_desc *desc2;
569 for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
570 if (reg->pfu_enabled) {
571 desc2 = card->rxbd_ring[i];
572 if (card->rx_buf_list[i]) {
573 skb = card->rx_buf_list[i];
574 pci_unmap_single(card->dev, desc2->paddr,
575 skb->len, PCI_DMA_TODEVICE);
576 dev_kfree_skb_any(skb);
578 memset(desc2, 0, sizeof(*desc2));
580 desc = card->rxbd_ring[i];
581 if (card->rx_buf_list[i]) {
582 skb = card->rx_buf_list[i];
583 pci_unmap_single(card->dev, desc->paddr,
584 skb->len, PCI_DMA_TODEVICE);
585 dev_kfree_skb_any(skb);
587 memset(desc, 0, sizeof(*desc));
589 card->rx_buf_list[i] = NULL;
595 /* This function cleans up event buffer rings. If any of the buffer list has
596 * valid SKB address, associated SKB is freed.
598 static void mwifiex_cleanup_evt_ring(struct mwifiex_adapter *adapter)
600 struct pcie_service_card *card = adapter->card;
601 struct mwifiex_evt_buf_desc *desc;
605 for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) {
606 desc = card->evtbd_ring[i];
607 if (card->evt_buf_list[i]) {
608 skb = card->evt_buf_list[i];
609 pci_unmap_single(card->dev, desc->paddr, MAX_EVENT_SIZE,
611 dev_kfree_skb_any(skb);
613 card->evt_buf_list[i] = NULL;
614 memset(desc, 0, sizeof(*desc));
620 /* This function creates buffer descriptor ring for TX
622 static int mwifiex_pcie_create_txbd_ring(struct mwifiex_adapter *adapter)
624 struct pcie_service_card *card = adapter->card;
625 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
628 * driver maintaines the write pointer and firmware maintaines the read
629 * pointer. The write pointer starts at 0 (zero) while the read pointer
630 * starts at zero with rollover bit set
632 card->txbd_wrptr = 0;
634 if (reg->pfu_enabled)
635 card->txbd_rdptr = 0;
637 card->txbd_rdptr |= reg->tx_rollover_ind;
639 /* allocate shared memory for the BD ring and divide the same in to
640 several descriptors */
641 if (reg->pfu_enabled)
642 card->txbd_ring_size = sizeof(struct mwifiex_pfu_buf_desc) *
645 card->txbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) *
648 dev_dbg(adapter->dev, "info: txbd_ring: Allocating %d bytes\n",
649 card->txbd_ring_size);
650 card->txbd_ring_vbase = pci_alloc_consistent(card->dev,
651 card->txbd_ring_size,
652 &card->txbd_ring_pbase);
653 if (!card->txbd_ring_vbase) {
654 dev_err(adapter->dev,
655 "allocate consistent memory (%d bytes) failed!\n",
656 card->txbd_ring_size);
659 dev_dbg(adapter->dev,
660 "info: txbd_ring - base: %p, pbase: %#x:%x, len: %x\n",
661 card->txbd_ring_vbase, (unsigned int)card->txbd_ring_pbase,
662 (u32)((u64)card->txbd_ring_pbase >> 32), card->txbd_ring_size);
664 return mwifiex_init_txq_ring(adapter);
667 static int mwifiex_pcie_delete_txbd_ring(struct mwifiex_adapter *adapter)
669 struct pcie_service_card *card = adapter->card;
670 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
672 mwifiex_cleanup_txq_ring(adapter);
674 if (card->txbd_ring_vbase)
675 pci_free_consistent(card->dev, card->txbd_ring_size,
676 card->txbd_ring_vbase,
677 card->txbd_ring_pbase);
678 card->txbd_ring_size = 0;
679 card->txbd_wrptr = 0;
680 card->txbd_rdptr = 0 | reg->tx_rollover_ind;
681 card->txbd_ring_vbase = NULL;
682 card->txbd_ring_pbase = 0;
688 * This function creates buffer descriptor ring for RX
690 static int mwifiex_pcie_create_rxbd_ring(struct mwifiex_adapter *adapter)
692 struct pcie_service_card *card = adapter->card;
693 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
696 * driver maintaines the read pointer and firmware maintaines the write
697 * pointer. The write pointer starts at 0 (zero) while the read pointer
698 * starts at zero with rollover bit set
700 card->rxbd_wrptr = 0;
701 card->rxbd_rdptr = reg->rx_rollover_ind;
703 if (reg->pfu_enabled)
704 card->rxbd_ring_size = sizeof(struct mwifiex_pfu_buf_desc) *
707 card->rxbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) *
710 dev_dbg(adapter->dev, "info: rxbd_ring: Allocating %d bytes\n",
711 card->rxbd_ring_size);
712 card->rxbd_ring_vbase = pci_alloc_consistent(card->dev,
713 card->rxbd_ring_size,
714 &card->rxbd_ring_pbase);
715 if (!card->rxbd_ring_vbase) {
716 dev_err(adapter->dev,
717 "allocate consistent memory (%d bytes) failed!\n",
718 card->rxbd_ring_size);
722 dev_dbg(adapter->dev,
723 "info: rxbd_ring - base: %p, pbase: %#x:%x, len: %#x\n",
724 card->rxbd_ring_vbase, (u32)card->rxbd_ring_pbase,
725 (u32)((u64)card->rxbd_ring_pbase >> 32),
726 card->rxbd_ring_size);
728 return mwifiex_init_rxq_ring(adapter);
732 * This function deletes Buffer descriptor ring for RX
734 static int mwifiex_pcie_delete_rxbd_ring(struct mwifiex_adapter *adapter)
736 struct pcie_service_card *card = adapter->card;
737 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
739 mwifiex_cleanup_rxq_ring(adapter);
741 if (card->rxbd_ring_vbase)
742 pci_free_consistent(card->dev, card->rxbd_ring_size,
743 card->rxbd_ring_vbase,
744 card->rxbd_ring_pbase);
745 card->rxbd_ring_size = 0;
746 card->rxbd_wrptr = 0;
747 card->rxbd_rdptr = 0 | reg->rx_rollover_ind;
748 card->rxbd_ring_vbase = NULL;
749 card->rxbd_ring_pbase = 0;
755 * This function creates buffer descriptor ring for Events
757 static int mwifiex_pcie_create_evtbd_ring(struct mwifiex_adapter *adapter)
759 struct pcie_service_card *card = adapter->card;
760 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
763 * driver maintaines the read pointer and firmware maintaines the write
764 * pointer. The write pointer starts at 0 (zero) while the read pointer
765 * starts at zero with rollover bit set
767 card->evtbd_wrptr = 0;
768 card->evtbd_rdptr = reg->evt_rollover_ind;
770 card->evtbd_ring_size = sizeof(struct mwifiex_evt_buf_desc) *
773 dev_dbg(adapter->dev, "info: evtbd_ring: Allocating %d bytes\n",
774 card->evtbd_ring_size);
775 card->evtbd_ring_vbase = pci_alloc_consistent(card->dev,
776 card->evtbd_ring_size,
777 &card->evtbd_ring_pbase);
778 if (!card->evtbd_ring_vbase) {
779 dev_err(adapter->dev,
780 "allocate consistent memory (%d bytes) failed!\n",
781 card->evtbd_ring_size);
785 dev_dbg(adapter->dev,
786 "info: CMDRSP/EVT bd_ring - base: %p pbase: %#x:%x len: %#x\n",
787 card->evtbd_ring_vbase, (u32)card->evtbd_ring_pbase,
788 (u32)((u64)card->evtbd_ring_pbase >> 32),
789 card->evtbd_ring_size);
791 return mwifiex_pcie_init_evt_ring(adapter);
795 * This function deletes Buffer descriptor ring for Events
797 static int mwifiex_pcie_delete_evtbd_ring(struct mwifiex_adapter *adapter)
799 struct pcie_service_card *card = adapter->card;
800 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
802 mwifiex_cleanup_evt_ring(adapter);
804 if (card->evtbd_ring_vbase)
805 pci_free_consistent(card->dev, card->evtbd_ring_size,
806 card->evtbd_ring_vbase,
807 card->evtbd_ring_pbase);
808 card->evtbd_wrptr = 0;
809 card->evtbd_rdptr = 0 | reg->evt_rollover_ind;
810 card->evtbd_ring_size = 0;
811 card->evtbd_ring_vbase = NULL;
812 card->evtbd_ring_pbase = 0;
818 * This function allocates a buffer for CMDRSP
820 static int mwifiex_pcie_alloc_cmdrsp_buf(struct mwifiex_adapter *adapter)
822 struct pcie_service_card *card = adapter->card;
825 /* Allocate memory for receiving command response data */
826 skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE);
828 dev_err(adapter->dev,
829 "Unable to allocate skb for command response data.\n");
832 skb_put(skb, MWIFIEX_UPLD_SIZE);
833 if (mwifiex_map_pci_memory(adapter, skb, MWIFIEX_UPLD_SIZE,
837 card->cmdrsp_buf = skb;
843 * This function deletes a buffer for CMDRSP
845 static int mwifiex_pcie_delete_cmdrsp_buf(struct mwifiex_adapter *adapter)
847 struct pcie_service_card *card;
853 card = adapter->card;
855 if (card && card->cmdrsp_buf) {
856 MWIFIEX_SKB_PACB(card->cmdrsp_buf, &buf_pa);
857 pci_unmap_single(card->dev, buf_pa, MWIFIEX_UPLD_SIZE,
859 dev_kfree_skb_any(card->cmdrsp_buf);
862 if (card && card->cmd_buf) {
863 MWIFIEX_SKB_PACB(card->cmd_buf, &buf_pa);
864 pci_unmap_single(card->dev, buf_pa, MWIFIEX_SIZE_OF_CMD_BUFFER,
866 dev_kfree_skb_any(card->cmd_buf);
872 * This function allocates a buffer for sleep cookie
874 static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter)
876 struct pcie_service_card *card = adapter->card;
878 card->sleep_cookie_vbase = pci_alloc_consistent(card->dev, sizeof(u32),
879 &card->sleep_cookie_pbase);
880 if (!card->sleep_cookie_vbase) {
881 dev_err(adapter->dev, "pci_alloc_consistent failed!\n");
884 /* Init val of Sleep Cookie */
885 *(u32 *)card->sleep_cookie_vbase = FW_AWAKE_COOKIE;
887 dev_dbg(adapter->dev, "alloc_scook: sleep cookie=0x%x\n",
888 *((u32 *)card->sleep_cookie_vbase));
894 * This function deletes buffer for sleep cookie
896 static int mwifiex_pcie_delete_sleep_cookie_buf(struct mwifiex_adapter *adapter)
898 struct pcie_service_card *card;
903 card = adapter->card;
905 if (card && card->sleep_cookie_vbase) {
906 pci_free_consistent(card->dev, sizeof(u32),
907 card->sleep_cookie_vbase,
908 card->sleep_cookie_pbase);
909 card->sleep_cookie_vbase = NULL;
915 /* This function flushes the TX buffer descriptor ring
916 * This function defined as handler is also called while cleaning TXRX
917 * during disconnect/ bss stop.
919 static int mwifiex_clean_pcie_ring_buf(struct mwifiex_adapter *adapter)
921 struct pcie_service_card *card = adapter->card;
923 if (!mwifiex_pcie_txbd_empty(card, card->txbd_rdptr)) {
924 card->txbd_flush = 1;
925 /* write pointer already set at last send
926 * send dnld-rdy intr again, wait for completion.
928 if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
929 CPU_INTR_DNLD_RDY)) {
930 dev_err(adapter->dev,
931 "failed to assert dnld-rdy interrupt.\n");
939 * This function unmaps and frees downloaded data buffer
941 static int mwifiex_pcie_send_data_complete(struct mwifiex_adapter *adapter)
945 u32 wrdoneidx, rdptr, num_tx_buffs, unmap_count = 0;
946 struct mwifiex_pcie_buf_desc *desc;
947 struct mwifiex_pfu_buf_desc *desc2;
948 struct pcie_service_card *card = adapter->card;
949 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
951 if (!mwifiex_pcie_ok_to_access_hw(adapter))
952 mwifiex_pm_wakeup_card(adapter);
954 /* Read the TX ring read pointer set by firmware */
955 if (mwifiex_read_reg(adapter, reg->tx_rdptr, &rdptr)) {
956 dev_err(adapter->dev,
957 "SEND COMP: failed to read reg->tx_rdptr\n");
961 dev_dbg(adapter->dev, "SEND COMP: rdptr_prev=0x%x, rdptr=0x%x\n",
962 card->txbd_rdptr, rdptr);
964 num_tx_buffs = MWIFIEX_MAX_TXRX_BD << reg->tx_start_ptr;
965 /* free from previous txbd_rdptr to current txbd_rdptr */
966 while (((card->txbd_rdptr & reg->tx_mask) !=
967 (rdptr & reg->tx_mask)) ||
968 ((card->txbd_rdptr & reg->tx_rollover_ind) !=
969 (rdptr & reg->tx_rollover_ind))) {
970 wrdoneidx = (card->txbd_rdptr & reg->tx_mask) >>
973 skb = card->tx_buf_list[wrdoneidx];
975 dev_dbg(adapter->dev,
976 "SEND COMP: Detach skb %p at txbd_rdidx=%d\n",
978 MWIFIEX_SKB_PACB(skb, &buf_pa);
979 pci_unmap_single(card->dev, buf_pa, skb->len,
984 if (card->txbd_flush)
985 mwifiex_write_data_complete(adapter, skb, 0,
988 mwifiex_write_data_complete(adapter, skb, 0, 0);
991 card->tx_buf_list[wrdoneidx] = NULL;
993 if (reg->pfu_enabled) {
994 desc2 = (void *)card->txbd_ring[wrdoneidx];
995 memset(desc2, 0, sizeof(*desc2));
997 desc = card->txbd_ring[wrdoneidx];
998 memset(desc, 0, sizeof(*desc));
1000 switch (card->dev->device) {
1001 case PCIE_DEVICE_ID_MARVELL_88W8766P:
1004 case PCIE_DEVICE_ID_MARVELL_88W8897:
1005 card->txbd_rdptr += reg->ring_tx_start_ptr;
1010 if ((card->txbd_rdptr & reg->tx_mask) == num_tx_buffs)
1011 card->txbd_rdptr = ((card->txbd_rdptr &
1012 reg->tx_rollover_ind) ^
1013 reg->tx_rollover_ind);
1017 adapter->data_sent = false;
1019 if (card->txbd_flush) {
1020 if (mwifiex_pcie_txbd_empty(card, card->txbd_rdptr))
1021 card->txbd_flush = 0;
1023 mwifiex_clean_pcie_ring_buf(adapter);
1029 /* This function sends data buffer to device. First 4 bytes of payload
1030 * are filled with payload length and payload type. Then this payload
1031 * is mapped to PCI device memory. Tx ring pointers are advanced accordingly.
1032 * Download ready interrupt to FW is deffered if Tx ring is not full and
1033 * additional payload can be accomodated.
1036 mwifiex_pcie_send_data(struct mwifiex_adapter *adapter, struct sk_buff *skb,
1037 struct mwifiex_tx_param *tx_param)
1039 struct pcie_service_card *card = adapter->card;
1040 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1041 u32 wrindx, num_tx_buffs, rx_val;
1044 struct mwifiex_pcie_buf_desc *desc = NULL;
1045 struct mwifiex_pfu_buf_desc *desc2 = NULL;
1048 if (!(skb->data && skb->len)) {
1049 dev_err(adapter->dev, "%s(): invalid parameter <%p, %#x>\n",
1050 __func__, skb->data, skb->len);
1054 if (!mwifiex_pcie_ok_to_access_hw(adapter))
1055 mwifiex_pm_wakeup_card(adapter);
1057 num_tx_buffs = MWIFIEX_MAX_TXRX_BD << reg->tx_start_ptr;
1058 dev_dbg(adapter->dev, "info: SEND DATA: <Rd: %#x, Wr: %#x>\n",
1059 card->txbd_rdptr, card->txbd_wrptr);
1060 if (mwifiex_pcie_txbd_not_full(card)) {
1063 adapter->data_sent = true;
1064 payload = skb->data;
1065 tmp = (__le16 *)&payload[0];
1066 *tmp = cpu_to_le16((u16)skb->len);
1067 tmp = (__le16 *)&payload[2];
1068 *tmp = cpu_to_le16(MWIFIEX_TYPE_DATA);
1070 if (mwifiex_map_pci_memory(adapter, skb, skb->len ,
1074 wrindx = (card->txbd_wrptr & reg->tx_mask) >> reg->tx_start_ptr;
1075 MWIFIEX_SKB_PACB(skb, &buf_pa);
1076 card->tx_buf_list[wrindx] = skb;
1078 if (reg->pfu_enabled) {
1079 desc2 = (void *)card->txbd_ring[wrindx];
1080 desc2->paddr = buf_pa;
1081 desc2->len = (u16)skb->len;
1082 desc2->frag_len = (u16)skb->len;
1084 desc2->flags = MWIFIEX_BD_FLAG_FIRST_DESC |
1085 MWIFIEX_BD_FLAG_LAST_DESC;
1087 desc = card->txbd_ring[wrindx];
1088 desc->paddr = buf_pa;
1089 desc->len = (u16)skb->len;
1090 desc->flags = MWIFIEX_BD_FLAG_FIRST_DESC |
1091 MWIFIEX_BD_FLAG_LAST_DESC;
1094 switch (card->dev->device) {
1095 case PCIE_DEVICE_ID_MARVELL_88W8766P:
1098 case PCIE_DEVICE_ID_MARVELL_88W8897:
1099 card->txbd_wrptr += reg->ring_tx_start_ptr;
1103 if ((card->txbd_wrptr & reg->tx_mask) == num_tx_buffs)
1104 card->txbd_wrptr = ((card->txbd_wrptr &
1105 reg->tx_rollover_ind) ^
1106 reg->tx_rollover_ind);
1108 rx_val = card->rxbd_rdptr & reg->rx_wrap_mask;
1109 /* Write the TX ring write pointer in to reg->tx_wrptr */
1110 if (mwifiex_write_reg(adapter, reg->tx_wrptr,
1111 card->txbd_wrptr | rx_val)) {
1112 dev_err(adapter->dev,
1113 "SEND DATA: failed to write reg->tx_wrptr\n");
1117 if ((mwifiex_pcie_txbd_not_full(card)) &&
1118 tx_param->next_pkt_len) {
1119 /* have more packets and TxBD still can hold more */
1120 dev_dbg(adapter->dev,
1121 "SEND DATA: delay dnld-rdy interrupt.\n");
1122 adapter->data_sent = false;
1124 /* Send the TX ready interrupt */
1125 if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
1126 CPU_INTR_DNLD_RDY)) {
1127 dev_err(adapter->dev,
1128 "SEND DATA: failed to assert dnld-rdy interrupt.\n");
1133 dev_dbg(adapter->dev, "info: SEND DATA: Updated <Rd: %#x, Wr: "
1134 "%#x> and sent packet to firmware successfully\n",
1135 card->txbd_rdptr, card->txbd_wrptr);
1137 dev_dbg(adapter->dev,
1138 "info: TX Ring full, can't send packets to fw\n");
1139 adapter->data_sent = true;
1140 /* Send the TX ready interrupt */
1141 if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
1143 dev_err(adapter->dev,
1144 "SEND DATA: failed to assert door-bell intr\n");
1148 return -EINPROGRESS;
1150 MWIFIEX_SKB_PACB(skb, &buf_pa);
1151 pci_unmap_single(card->dev, buf_pa, skb->len, PCI_DMA_TODEVICE);
1152 card->tx_buf_list[wrindx] = NULL;
1153 if (reg->pfu_enabled)
1154 memset(desc2, 0, sizeof(*desc2));
1156 memset(desc, 0, sizeof(*desc));
1162 * This function handles received buffer ring and
1163 * dispatches packets to upper
1165 static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter)
1167 struct pcie_service_card *card = adapter->card;
1168 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1169 u32 wrptr, rd_index, tx_val;
1172 struct sk_buff *skb_tmp = NULL;
1173 struct mwifiex_pcie_buf_desc *desc;
1174 struct mwifiex_pfu_buf_desc *desc2;
1176 if (!mwifiex_pcie_ok_to_access_hw(adapter))
1177 mwifiex_pm_wakeup_card(adapter);
1179 /* Read the RX ring Write pointer set by firmware */
1180 if (mwifiex_read_reg(adapter, reg->rx_wrptr, &wrptr)) {
1181 dev_err(adapter->dev,
1182 "RECV DATA: failed to read reg->rx_wrptr\n");
1186 card->rxbd_wrptr = wrptr;
1188 while (((wrptr & reg->rx_mask) !=
1189 (card->rxbd_rdptr & reg->rx_mask)) ||
1190 ((wrptr & reg->rx_rollover_ind) ==
1191 (card->rxbd_rdptr & reg->rx_rollover_ind))) {
1192 struct sk_buff *skb_data;
1196 rd_index = card->rxbd_rdptr & reg->rx_mask;
1197 skb_data = card->rx_buf_list[rd_index];
1199 MWIFIEX_SKB_PACB(skb_data, &buf_pa);
1200 pci_unmap_single(card->dev, buf_pa, MWIFIEX_RX_DATA_BUF_SIZE,
1201 PCI_DMA_FROMDEVICE);
1202 card->rx_buf_list[rd_index] = NULL;
1204 /* Get data length from interface header -
1205 * first 2 bytes for len, next 2 bytes is for type
1207 pkt_len = *((__le16 *)skb_data->data);
1208 rx_len = le16_to_cpu(pkt_len);
1209 skb_put(skb_data, rx_len);
1210 dev_dbg(adapter->dev,
1211 "info: RECV DATA: Rd=%#x, Wr=%#x, Len=%d\n",
1212 card->rxbd_rdptr, wrptr, rx_len);
1213 skb_pull(skb_data, INTF_HEADER_LEN);
1214 mwifiex_handle_rx_packet(adapter, skb_data);
1216 skb_tmp = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE);
1218 dev_err(adapter->dev,
1219 "Unable to allocate skb.\n");
1223 if (mwifiex_map_pci_memory(adapter, skb_tmp,
1224 MWIFIEX_RX_DATA_BUF_SIZE,
1225 PCI_DMA_FROMDEVICE))
1228 MWIFIEX_SKB_PACB(skb_tmp, &buf_pa);
1230 dev_dbg(adapter->dev,
1231 "RECV DATA: Attach new sk_buff %p at rxbd_rdidx=%d\n",
1233 card->rx_buf_list[rd_index] = skb_tmp;
1235 if (reg->pfu_enabled) {
1236 desc2 = (void *)card->rxbd_ring[rd_index];
1237 desc2->paddr = buf_pa;
1238 desc2->len = skb_tmp->len;
1239 desc2->frag_len = skb_tmp->len;
1241 desc2->flags = reg->ring_flag_sop | reg->ring_flag_eop;
1243 desc = card->rxbd_ring[rd_index];
1244 desc->paddr = buf_pa;
1245 desc->len = skb_tmp->len;
1249 if ((++card->rxbd_rdptr & reg->rx_mask) ==
1250 MWIFIEX_MAX_TXRX_BD) {
1251 card->rxbd_rdptr = ((card->rxbd_rdptr &
1252 reg->rx_rollover_ind) ^
1253 reg->rx_rollover_ind);
1255 dev_dbg(adapter->dev, "info: RECV DATA: <Rd: %#x, Wr: %#x>\n",
1256 card->rxbd_rdptr, wrptr);
1258 tx_val = card->txbd_wrptr & reg->tx_wrap_mask;
1259 /* Write the RX ring read pointer in to reg->rx_rdptr */
1260 if (mwifiex_write_reg(adapter, reg->rx_rdptr,
1261 card->rxbd_rdptr | tx_val)) {
1262 dev_err(adapter->dev,
1263 "RECV DATA: failed to write reg->rx_rdptr\n");
1268 /* Read the RX ring Write pointer set by firmware */
1269 if (mwifiex_read_reg(adapter, reg->rx_wrptr, &wrptr)) {
1270 dev_err(adapter->dev,
1271 "RECV DATA: failed to read reg->rx_wrptr\n");
1275 dev_dbg(adapter->dev,
1276 "info: RECV DATA: Rcvd packet from fw successfully\n");
1277 card->rxbd_wrptr = wrptr;
1285 * This function downloads the boot command to device
1288 mwifiex_pcie_send_boot_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb)
1291 struct pcie_service_card *card = adapter->card;
1292 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1294 if (!(skb->data && skb->len)) {
1295 dev_err(adapter->dev,
1296 "Invalid parameter in %s <%p. len %d>\n",
1297 __func__, skb->data, skb->len);
1301 if (mwifiex_map_pci_memory(adapter, skb, skb->len , PCI_DMA_TODEVICE))
1304 MWIFIEX_SKB_PACB(skb, &buf_pa);
1306 /* Write the lower 32bits of the physical address to low command
1307 * address scratch register
1309 if (mwifiex_write_reg(adapter, reg->cmd_addr_lo, (u32)buf_pa)) {
1310 dev_err(adapter->dev,
1311 "%s: failed to write download command to boot code.\n",
1313 pci_unmap_single(card->dev, buf_pa, MWIFIEX_UPLD_SIZE,
1318 /* Write the upper 32bits of the physical address to high command
1319 * address scratch register
1321 if (mwifiex_write_reg(adapter, reg->cmd_addr_hi,
1322 (u32)((u64)buf_pa >> 32))) {
1323 dev_err(adapter->dev,
1324 "%s: failed to write download command to boot code.\n",
1326 pci_unmap_single(card->dev, buf_pa, MWIFIEX_UPLD_SIZE,
1331 /* Write the command length to cmd_size scratch register */
1332 if (mwifiex_write_reg(adapter, reg->cmd_size, skb->len)) {
1333 dev_err(adapter->dev,
1334 "%s: failed to write command len to cmd_size scratch reg\n",
1336 pci_unmap_single(card->dev, buf_pa, MWIFIEX_UPLD_SIZE,
1341 /* Ring the door bell */
1342 if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
1343 CPU_INTR_DOOR_BELL)) {
1344 dev_err(adapter->dev,
1345 "%s: failed to assert door-bell intr\n", __func__);
1346 pci_unmap_single(card->dev, buf_pa,
1347 MWIFIEX_UPLD_SIZE, PCI_DMA_TODEVICE);
1354 /* This function init rx port in firmware which in turn enables to receive data
1355 * from device before transmitting any packet.
1357 static int mwifiex_pcie_init_fw_port(struct mwifiex_adapter *adapter)
1359 struct pcie_service_card *card = adapter->card;
1360 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1361 int tx_wrap = card->txbd_wrptr & reg->tx_wrap_mask;
1363 /* Write the RX ring read pointer in to reg->rx_rdptr */
1364 if (mwifiex_write_reg(adapter, reg->rx_rdptr, card->rxbd_rdptr |
1366 dev_err(adapter->dev,
1367 "RECV DATA: failed to write reg->rx_rdptr\n");
1373 /* This function downloads commands to the device
1376 mwifiex_pcie_send_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb)
1378 struct pcie_service_card *card = adapter->card;
1379 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1381 dma_addr_t cmd_buf_pa, cmdrsp_buf_pa;
1382 u8 *payload = (u8 *)skb->data;
1384 if (!(skb->data && skb->len)) {
1385 dev_err(adapter->dev, "Invalid parameter in %s <%p, %#x>\n",
1386 __func__, skb->data, skb->len);
1390 /* Make sure a command response buffer is available */
1391 if (!card->cmdrsp_buf) {
1392 dev_err(adapter->dev,
1393 "No response buffer available, send command failed\n");
1397 if (!mwifiex_pcie_ok_to_access_hw(adapter))
1398 mwifiex_pm_wakeup_card(adapter);
1400 adapter->cmd_sent = true;
1402 *(__le16 *)&payload[0] = cpu_to_le16((u16)skb->len);
1403 *(__le16 *)&payload[2] = cpu_to_le16(MWIFIEX_TYPE_CMD);
1405 if (mwifiex_map_pci_memory(adapter, skb, skb->len, PCI_DMA_TODEVICE))
1408 card->cmd_buf = skb;
1410 /* To send a command, the driver will:
1411 1. Write the 64bit physical address of the data buffer to
1412 cmd response address low + cmd response address high
1413 2. Ring the door bell (i.e. set the door bell interrupt)
1415 In response to door bell interrupt, the firmware will perform
1416 the DMA of the command packet (first header to obtain the total
1417 length and then rest of the command).
1420 if (card->cmdrsp_buf) {
1421 MWIFIEX_SKB_PACB(card->cmdrsp_buf, &cmdrsp_buf_pa);
1422 /* Write the lower 32bits of the cmdrsp buffer physical
1424 if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_lo,
1425 (u32)cmdrsp_buf_pa)) {
1426 dev_err(adapter->dev,
1427 "Failed to write download cmd to boot code.\n");
1431 /* Write the upper 32bits of the cmdrsp buffer physical
1433 if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_hi,
1434 (u32)((u64)cmdrsp_buf_pa >> 32))) {
1435 dev_err(adapter->dev,
1436 "Failed to write download cmd to boot code.\n");
1442 MWIFIEX_SKB_PACB(card->cmd_buf, &cmd_buf_pa);
1443 /* Write the lower 32bits of the physical address to reg->cmd_addr_lo */
1444 if (mwifiex_write_reg(adapter, reg->cmd_addr_lo,
1446 dev_err(adapter->dev,
1447 "Failed to write download cmd to boot code.\n");
1451 /* Write the upper 32bits of the physical address to reg->cmd_addr_hi */
1452 if (mwifiex_write_reg(adapter, reg->cmd_addr_hi,
1453 (u32)((u64)cmd_buf_pa >> 32))) {
1454 dev_err(adapter->dev,
1455 "Failed to write download cmd to boot code.\n");
1460 /* Write the command length to reg->cmd_size */
1461 if (mwifiex_write_reg(adapter, reg->cmd_size,
1462 card->cmd_buf->len)) {
1463 dev_err(adapter->dev,
1464 "Failed to write cmd len to reg->cmd_size\n");
1469 /* Ring the door bell */
1470 if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
1471 CPU_INTR_DOOR_BELL)) {
1472 dev_err(adapter->dev,
1473 "Failed to assert door-bell intr\n");
1480 adapter->cmd_sent = false;
1486 * This function handles command complete interrupt
1488 static int mwifiex_pcie_process_cmd_complete(struct mwifiex_adapter *adapter)
1490 struct pcie_service_card *card = adapter->card;
1491 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1492 struct sk_buff *skb = card->cmdrsp_buf;
1498 dev_dbg(adapter->dev, "info: Rx CMD Response\n");
1500 MWIFIEX_SKB_PACB(skb, &buf_pa);
1501 pci_unmap_single(card->dev, buf_pa, MWIFIEX_UPLD_SIZE,
1502 PCI_DMA_FROMDEVICE);
1504 pkt_len = *((__le16 *)skb->data);
1505 rx_len = le16_to_cpu(pkt_len);
1506 skb_trim(skb, rx_len);
1507 skb_pull(skb, INTF_HEADER_LEN);
1509 if (!adapter->curr_cmd) {
1510 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
1511 mwifiex_process_sleep_confirm_resp(adapter, skb->data,
1513 while (reg->sleep_cookie && (count++ < 10) &&
1514 mwifiex_pcie_ok_to_access_hw(adapter))
1515 usleep_range(50, 60);
1517 dev_err(adapter->dev,
1518 "There is no command but got cmdrsp\n");
1520 memcpy(adapter->upld_buf, skb->data,
1521 min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER, skb->len));
1522 skb_push(skb, INTF_HEADER_LEN);
1523 if (mwifiex_map_pci_memory(adapter, skb, MWIFIEX_UPLD_SIZE,
1524 PCI_DMA_FROMDEVICE))
1527 MWIFIEX_SKB_PACB(skb, &buf_pa);
1528 } else if (mwifiex_pcie_ok_to_access_hw(adapter)) {
1529 adapter->curr_cmd->resp_skb = skb;
1530 adapter->cmd_resp_received = true;
1531 /* Take the pointer and set it to CMD node and will
1532 return in the response complete callback */
1533 card->cmdrsp_buf = NULL;
1535 /* Clear the cmd-rsp buffer address in scratch registers. This
1536 will prevent firmware from writing to the same response
1538 if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_lo, 0)) {
1539 dev_err(adapter->dev,
1540 "cmd_done: failed to clear cmd_rsp_addr_lo\n");
1543 /* Write the upper 32bits of the cmdrsp buffer physical
1545 if (mwifiex_write_reg(adapter, reg->cmdrsp_addr_hi, 0)) {
1546 dev_err(adapter->dev,
1547 "cmd_done: failed to clear cmd_rsp_addr_hi\n");
1556 * Command Response processing complete handler
1558 static int mwifiex_pcie_cmdrsp_complete(struct mwifiex_adapter *adapter,
1559 struct sk_buff *skb)
1561 struct pcie_service_card *card = adapter->card;
1563 struct sk_buff *skb_tmp;
1566 card->cmdrsp_buf = skb;
1567 skb_push(card->cmdrsp_buf, INTF_HEADER_LEN);
1568 if (mwifiex_map_pci_memory(adapter, skb, MWIFIEX_UPLD_SIZE,
1569 PCI_DMA_FROMDEVICE))
1573 skb_tmp = card->cmd_buf;
1575 MWIFIEX_SKB_PACB(skb_tmp, &buf_pa);
1576 pci_unmap_single(card->dev, buf_pa, MWIFIEX_UPLD_SIZE,
1577 PCI_DMA_FROMDEVICE);
1578 card->cmd_buf = NULL;
1585 * This function handles firmware event ready interrupt
1587 static int mwifiex_pcie_process_event_ready(struct mwifiex_adapter *adapter)
1589 struct pcie_service_card *card = adapter->card;
1590 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1591 u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK;
1594 struct mwifiex_evt_buf_desc *desc;
1596 if (!mwifiex_pcie_ok_to_access_hw(adapter))
1597 mwifiex_pm_wakeup_card(adapter);
1599 if (adapter->event_received) {
1600 dev_dbg(adapter->dev, "info: Event being processed, "
1601 "do not process this interrupt just yet\n");
1605 if (rdptr >= MWIFIEX_MAX_EVT_BD) {
1606 dev_dbg(adapter->dev, "info: Invalid read pointer...\n");
1610 /* Read the event ring write pointer set by firmware */
1611 if (mwifiex_read_reg(adapter, reg->evt_wrptr, &wrptr)) {
1612 dev_err(adapter->dev,
1613 "EventReady: failed to read reg->evt_wrptr\n");
1617 dev_dbg(adapter->dev, "info: EventReady: Initial <Rd: 0x%x, Wr: 0x%x>",
1618 card->evtbd_rdptr, wrptr);
1619 if (((wrptr & MWIFIEX_EVTBD_MASK) != (card->evtbd_rdptr
1620 & MWIFIEX_EVTBD_MASK)) ||
1621 ((wrptr & reg->evt_rollover_ind) ==
1622 (card->evtbd_rdptr & reg->evt_rollover_ind))) {
1623 struct sk_buff *skb_cmd;
1624 __le16 data_len = 0;
1627 dev_dbg(adapter->dev, "info: Read Index: %d\n", rdptr);
1628 skb_cmd = card->evt_buf_list[rdptr];
1629 MWIFIEX_SKB_PACB(skb_cmd, &buf_pa);
1630 pci_unmap_single(card->dev, buf_pa, MAX_EVENT_SIZE,
1631 PCI_DMA_FROMDEVICE);
1633 /* Take the pointer and set it to event pointer in adapter
1634 and will return back after event handling callback */
1635 card->evt_buf_list[rdptr] = NULL;
1636 desc = card->evtbd_ring[rdptr];
1637 memset(desc, 0, sizeof(*desc));
1639 event = *(u32 *) &skb_cmd->data[INTF_HEADER_LEN];
1640 adapter->event_cause = event;
1641 /* The first 4bytes will be the event transfer header
1642 len is 2 bytes followed by type which is 2 bytes */
1643 memcpy(&data_len, skb_cmd->data, sizeof(__le16));
1644 evt_len = le16_to_cpu(data_len);
1646 skb_pull(skb_cmd, INTF_HEADER_LEN);
1647 dev_dbg(adapter->dev, "info: Event length: %d\n", evt_len);
1649 if ((evt_len > 0) && (evt_len < MAX_EVENT_SIZE))
1650 memcpy(adapter->event_body, skb_cmd->data +
1651 MWIFIEX_EVENT_HEADER_LEN, evt_len -
1652 MWIFIEX_EVENT_HEADER_LEN);
1654 adapter->event_received = true;
1655 adapter->event_skb = skb_cmd;
1657 /* Do not update the event read pointer here, wait till the
1658 buffer is released. This is just to make things simpler,
1659 we need to find a better method of managing these buffers.
1667 * Event processing complete handler
1669 static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter,
1670 struct sk_buff *skb)
1672 struct pcie_service_card *card = adapter->card;
1673 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1675 u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK;
1678 struct mwifiex_evt_buf_desc *desc;
1683 if (rdptr >= MWIFIEX_MAX_EVT_BD) {
1684 dev_err(adapter->dev, "event_complete: Invalid rdptr 0x%x\n",
1689 /* Read the event ring write pointer set by firmware */
1690 if (mwifiex_read_reg(adapter, reg->evt_wrptr, &wrptr)) {
1691 dev_err(adapter->dev,
1692 "event_complete: failed to read reg->evt_wrptr\n");
1696 if (!card->evt_buf_list[rdptr]) {
1697 skb_push(skb, INTF_HEADER_LEN);
1698 if (mwifiex_map_pci_memory(adapter, skb,
1700 PCI_DMA_FROMDEVICE))
1702 MWIFIEX_SKB_PACB(skb, &buf_pa);
1703 card->evt_buf_list[rdptr] = skb;
1704 MWIFIEX_SKB_PACB(skb, &buf_pa);
1705 desc = card->evtbd_ring[rdptr];
1706 desc->paddr = buf_pa;
1707 desc->len = (u16)skb->len;
1711 dev_dbg(adapter->dev,
1712 "info: ERROR: buf still valid at index %d, <%p, %p>\n",
1713 rdptr, card->evt_buf_list[rdptr], skb);
1716 if ((++card->evtbd_rdptr & MWIFIEX_EVTBD_MASK) == MWIFIEX_MAX_EVT_BD) {
1717 card->evtbd_rdptr = ((card->evtbd_rdptr &
1718 reg->evt_rollover_ind) ^
1719 reg->evt_rollover_ind);
1722 dev_dbg(adapter->dev, "info: Updated <Rd: 0x%x, Wr: 0x%x>",
1723 card->evtbd_rdptr, wrptr);
1725 /* Write the event ring read pointer in to reg->evt_rdptr */
1726 if (mwifiex_write_reg(adapter, reg->evt_rdptr,
1727 card->evtbd_rdptr)) {
1728 dev_err(adapter->dev,
1729 "event_complete: failed to read reg->evt_rdptr\n");
1733 dev_dbg(adapter->dev, "info: Check Events Again\n");
1734 ret = mwifiex_pcie_process_event_ready(adapter);
1740 * This function downloads the firmware to the card.
1742 * Firmware is downloaded to the card in blocks. Every block download
1743 * is tested for CRC errors, and retried a number of times before
1744 * returning failure.
1746 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
1747 struct mwifiex_fw_image *fw)
1750 u8 *firmware = fw->fw_buf;
1751 u32 firmware_len = fw->fw_len;
1753 struct sk_buff *skb;
1754 u32 txlen, tx_blocks = 0, tries, len;
1755 u32 block_retry_cnt = 0;
1757 struct pcie_service_card *card = adapter->card;
1758 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1760 if (!firmware || !firmware_len) {
1761 dev_err(adapter->dev,
1762 "No firmware image found! Terminating download\n");
1766 dev_dbg(adapter->dev, "info: Downloading FW image (%d bytes)\n",
1769 if (mwifiex_pcie_disable_host_int(adapter)) {
1770 dev_err(adapter->dev,
1771 "%s: Disabling interrupts failed.\n", __func__);
1775 skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE);
1781 /* Perform firmware data transfer */
1786 if (offset >= firmware_len)
1789 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
1790 ret = mwifiex_read_reg(adapter, reg->cmd_size,
1793 dev_warn(adapter->dev,
1794 "Failed reading len from boot code\n");
1799 usleep_range(10, 20);
1804 } else if (len > MWIFIEX_UPLD_SIZE) {
1805 pr_err("FW download failure @ %d, invalid length %d\n",
1815 if (block_retry_cnt > MAX_WRITE_IOMEM_RETRY) {
1816 pr_err("FW download failure @ %d, over max "
1817 "retry count\n", offset);
1821 dev_err(adapter->dev, "FW CRC error indicated by the "
1822 "helper: len = 0x%04X, txlen = %d\n",
1825 /* Setting this to 0 to resend from same offset */
1828 block_retry_cnt = 0;
1829 /* Set blocksize to transfer - checking for
1831 if (firmware_len - offset < txlen)
1832 txlen = firmware_len - offset;
1834 dev_dbg(adapter->dev, ".");
1836 tx_blocks = (txlen + card->pcie.blksz_fw_dl - 1) /
1837 card->pcie.blksz_fw_dl;
1839 /* Copy payload to buffer */
1840 memmove(skb->data, &firmware[offset], txlen);
1843 skb_put(skb, MWIFIEX_UPLD_SIZE - skb->len);
1844 skb_trim(skb, tx_blocks * card->pcie.blksz_fw_dl);
1846 /* Send the boot command to device */
1847 if (mwifiex_pcie_send_boot_cmd(adapter, skb)) {
1848 dev_err(adapter->dev,
1849 "Failed to send firmware download command\n");
1854 MWIFIEX_SKB_PACB(skb, &buf_pa);
1856 /* Wait for the command done interrupt */
1858 if (mwifiex_read_reg(adapter, PCIE_CPU_INT_STATUS,
1860 dev_err(adapter->dev, "%s: Failed to read "
1861 "interrupt status during fw dnld.\n",
1863 pci_unmap_single(card->dev, buf_pa, skb->len,
1868 } while ((ireg_intr & CPU_INTR_DOOR_BELL) ==
1869 CPU_INTR_DOOR_BELL);
1871 pci_unmap_single(card->dev, buf_pa, skb->len,
1877 dev_dbg(adapter->dev, "info:\nFW download over, size %d bytes\n",
1883 dev_kfree_skb_any(skb);
1888 * This function checks the firmware status in card.
1890 * The winner interface is also determined by this function.
1893 mwifiex_check_fw_status(struct mwifiex_adapter *adapter, u32 poll_num)
1896 u32 firmware_stat, winner_status;
1897 struct pcie_service_card *card = adapter->card;
1898 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
1901 /* Mask spurios interrupts */
1902 if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS_MASK,
1904 dev_warn(adapter->dev, "Write register failed\n");
1908 dev_dbg(adapter->dev, "Setting driver ready signature\n");
1909 if (mwifiex_write_reg(adapter, reg->drv_rdy,
1910 FIRMWARE_READY_PCIE)) {
1911 dev_err(adapter->dev,
1912 "Failed to write driver ready signature\n");
1916 /* Wait for firmware initialization event */
1917 for (tries = 0; tries < poll_num; tries++) {
1918 if (mwifiex_read_reg(adapter, reg->fw_status,
1925 if (firmware_stat == FIRMWARE_READY_PCIE) {
1935 if (mwifiex_read_reg(adapter, reg->fw_status,
1938 else if (!winner_status) {
1939 dev_err(adapter->dev, "PCI-E is the winner\n");
1940 adapter->winner = 1;
1943 dev_err(adapter->dev,
1944 "PCI-E is not the winner <%#x,%d>, exit dnld\n",
1945 ret, adapter->winner);
1954 * This function reads the interrupt status from card.
1956 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
1959 unsigned long flags;
1961 if (!mwifiex_pcie_ok_to_access_hw(adapter))
1964 if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS, &pcie_ireg)) {
1965 dev_warn(adapter->dev, "Read register failed\n");
1969 if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) {
1971 mwifiex_pcie_disable_host_int(adapter);
1973 /* Clear the pending interrupts */
1974 if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS,
1976 dev_warn(adapter->dev, "Write register failed\n");
1979 spin_lock_irqsave(&adapter->int_lock, flags);
1980 adapter->int_status |= pcie_ireg;
1981 spin_unlock_irqrestore(&adapter->int_lock, flags);
1983 if (pcie_ireg & HOST_INTR_CMD_DONE) {
1984 if ((adapter->ps_state == PS_STATE_SLEEP_CFM) ||
1985 (adapter->ps_state == PS_STATE_SLEEP)) {
1986 mwifiex_pcie_enable_host_int(adapter);
1987 if (mwifiex_write_reg(adapter,
1989 CPU_INTR_SLEEP_CFM_DONE)
1991 dev_warn(adapter->dev,
1992 "Write register failed\n");
1997 } else if (!adapter->pps_uapsd_mode &&
1998 adapter->ps_state == PS_STATE_SLEEP &&
1999 mwifiex_pcie_ok_to_access_hw(adapter)) {
2000 /* Potentially for PCIe we could get other
2001 * interrupts like shared. Don't change power
2002 * state until cookie is set */
2003 adapter->ps_state = PS_STATE_AWAKE;
2004 adapter->pm_wakeup_fw_try = false;
2010 * Interrupt handler for PCIe root port
2012 * This function reads the interrupt status from firmware and assigns
2013 * the main process in workqueue which will handle the interrupt.
2015 static irqreturn_t mwifiex_pcie_interrupt(int irq, void *context)
2017 struct pci_dev *pdev = (struct pci_dev *)context;
2018 struct pcie_service_card *card;
2019 struct mwifiex_adapter *adapter;
2022 pr_debug("info: %s: pdev is NULL\n", (u8 *)pdev);
2026 card = (struct pcie_service_card *) pci_get_drvdata(pdev);
2027 if (!card || !card->adapter) {
2028 pr_debug("info: %s: card=%p adapter=%p\n", __func__, card,
2029 card ? card->adapter : NULL);
2032 adapter = card->adapter;
2034 if (adapter->surprise_removed)
2037 mwifiex_interrupt_status(adapter);
2038 queue_work(adapter->workqueue, &adapter->main_work);
2045 * This function checks the current interrupt status.
2047 * The following interrupts are checked and handled by this function -
2050 * - Command received
2051 * - Packets received
2054 * In case of Rx packets received, the packets are uploaded from card to
2055 * host and processed accordingly.
2057 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
2061 unsigned long flags;
2063 spin_lock_irqsave(&adapter->int_lock, flags);
2064 /* Clear out unused interrupts */
2065 pcie_ireg = adapter->int_status;
2066 adapter->int_status = 0;
2067 spin_unlock_irqrestore(&adapter->int_lock, flags);
2069 while (pcie_ireg & HOST_INTR_MASK) {
2070 if (pcie_ireg & HOST_INTR_DNLD_DONE) {
2071 pcie_ireg &= ~HOST_INTR_DNLD_DONE;
2072 dev_dbg(adapter->dev, "info: TX DNLD Done\n");
2073 ret = mwifiex_pcie_send_data_complete(adapter);
2077 if (pcie_ireg & HOST_INTR_UPLD_RDY) {
2078 pcie_ireg &= ~HOST_INTR_UPLD_RDY;
2079 dev_dbg(adapter->dev, "info: Rx DATA\n");
2080 ret = mwifiex_pcie_process_recv_data(adapter);
2084 if (pcie_ireg & HOST_INTR_EVENT_RDY) {
2085 pcie_ireg &= ~HOST_INTR_EVENT_RDY;
2086 dev_dbg(adapter->dev, "info: Rx EVENT\n");
2087 ret = mwifiex_pcie_process_event_ready(adapter);
2092 if (pcie_ireg & HOST_INTR_CMD_DONE) {
2093 pcie_ireg &= ~HOST_INTR_CMD_DONE;
2094 if (adapter->cmd_sent) {
2095 dev_dbg(adapter->dev,
2096 "info: CMD sent Interrupt\n");
2097 adapter->cmd_sent = false;
2099 /* Handle command response */
2100 ret = mwifiex_pcie_process_cmd_complete(adapter);
2105 if (mwifiex_pcie_ok_to_access_hw(adapter)) {
2106 if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS,
2108 dev_warn(adapter->dev,
2109 "Read register failed\n");
2113 if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) {
2114 if (mwifiex_write_reg(adapter,
2115 PCIE_HOST_INT_STATUS,
2117 dev_warn(adapter->dev,
2118 "Write register failed\n");
2125 dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
2126 adapter->cmd_sent, adapter->data_sent);
2127 if (adapter->ps_state != PS_STATE_SLEEP)
2128 mwifiex_pcie_enable_host_int(adapter);
2134 * This function downloads data from driver to card.
2136 * Both commands and data packets are transferred to the card by this
2139 * This function adds the PCIE specific header to the front of the buffer
2140 * before transferring. The header contains the length of the packet and
2141 * the type. The firmware handles the packets based upon this set type.
2143 static int mwifiex_pcie_host_to_card(struct mwifiex_adapter *adapter, u8 type,
2144 struct sk_buff *skb,
2145 struct mwifiex_tx_param *tx_param)
2148 dev_err(adapter->dev, "Passed NULL skb to %s\n", __func__);
2152 if (type == MWIFIEX_TYPE_DATA)
2153 return mwifiex_pcie_send_data(adapter, skb, tx_param);
2154 else if (type == MWIFIEX_TYPE_CMD)
2155 return mwifiex_pcie_send_cmd(adapter, skb);
2161 * This function initializes the PCI-E host memory space, WCB rings, etc.
2163 * The following initializations steps are followed -
2164 * - Allocate TXBD ring buffers
2165 * - Allocate RXBD ring buffers
2166 * - Allocate event BD ring buffers
2167 * - Allocate command response ring buffer
2168 * - Allocate sleep cookie buffer
2170 static int mwifiex_pcie_init(struct mwifiex_adapter *adapter)
2172 struct pcie_service_card *card = adapter->card;
2174 struct pci_dev *pdev = card->dev;
2175 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
2177 pci_set_drvdata(pdev, card);
2179 ret = pci_enable_device(pdev);
2181 goto err_enable_dev;
2183 pci_set_master(pdev);
2185 dev_dbg(adapter->dev, "try set_consistent_dma_mask(32)\n");
2186 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2188 dev_err(adapter->dev, "set_dma_mask(32) failed\n");
2189 goto err_set_dma_mask;
2192 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2194 dev_err(adapter->dev, "set_consistent_dma_mask(64) failed\n");
2195 goto err_set_dma_mask;
2198 ret = pci_request_region(pdev, 0, DRV_NAME);
2200 dev_err(adapter->dev, "req_reg(0) error\n");
2201 goto err_req_region0;
2203 card->pci_mmap = pci_iomap(pdev, 0, 0);
2204 if (!card->pci_mmap) {
2205 dev_err(adapter->dev, "iomap(0) error\n");
2209 ret = pci_request_region(pdev, 2, DRV_NAME);
2211 dev_err(adapter->dev, "req_reg(2) error\n");
2212 goto err_req_region2;
2214 card->pci_mmap1 = pci_iomap(pdev, 2, 0);
2215 if (!card->pci_mmap1) {
2216 dev_err(adapter->dev, "iomap(2) error\n");
2221 dev_dbg(adapter->dev,
2222 "PCI memory map Virt0: %p PCI memory map Virt2: %p\n",
2223 card->pci_mmap, card->pci_mmap1);
2225 card->cmdrsp_buf = NULL;
2226 ret = mwifiex_pcie_create_txbd_ring(adapter);
2229 ret = mwifiex_pcie_create_rxbd_ring(adapter);
2232 ret = mwifiex_pcie_create_evtbd_ring(adapter);
2235 ret = mwifiex_pcie_alloc_cmdrsp_buf(adapter);
2237 goto err_alloc_cmdbuf;
2238 if (reg->sleep_cookie) {
2239 ret = mwifiex_pcie_alloc_sleep_cookie_buf(adapter);
2241 goto err_alloc_cookie;
2243 card->sleep_cookie_vbase = NULL;
2248 mwifiex_pcie_delete_cmdrsp_buf(adapter);
2250 mwifiex_pcie_delete_evtbd_ring(adapter);
2252 mwifiex_pcie_delete_rxbd_ring(adapter);
2254 mwifiex_pcie_delete_txbd_ring(adapter);
2256 pci_iounmap(pdev, card->pci_mmap1);
2258 pci_release_region(pdev, 2);
2260 pci_iounmap(pdev, card->pci_mmap);
2262 pci_release_region(pdev, 0);
2265 pci_disable_device(pdev);
2267 pci_set_drvdata(pdev, NULL);
2272 * This function cleans up the allocated card buffers.
2274 * The following are freed by this function -
2275 * - TXBD ring buffers
2276 * - RXBD ring buffers
2277 * - Event BD ring buffers
2278 * - Command response ring buffer
2279 * - Sleep cookie buffer
2281 static void mwifiex_pcie_cleanup(struct mwifiex_adapter *adapter)
2283 struct pcie_service_card *card = adapter->card;
2284 struct pci_dev *pdev = card->dev;
2285 const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
2288 dev_dbg(adapter->dev, "Clearing driver ready signature\n");
2289 if (mwifiex_write_reg(adapter, reg->drv_rdy, 0x00000000))
2290 dev_err(adapter->dev,
2291 "Failed to write driver not-ready signature\n");
2295 pci_iounmap(pdev, card->pci_mmap);
2296 pci_iounmap(pdev, card->pci_mmap1);
2298 pci_release_regions(pdev);
2299 pci_disable_device(pdev);
2300 pci_set_drvdata(pdev, NULL);
2305 * This function registers the PCIE device.
2307 * PCIE IRQ is claimed, block size is set and driver data is initialized.
2309 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
2312 struct pcie_service_card *card = adapter->card;
2313 struct pci_dev *pdev = card->dev;
2315 /* save adapter pointer in card */
2316 card->adapter = adapter;
2318 ret = request_irq(pdev->irq, mwifiex_pcie_interrupt, IRQF_SHARED,
2321 pr_err("request_irq failed: ret=%d\n", ret);
2322 adapter->card = NULL;
2326 adapter->dev = &pdev->dev;
2327 strcpy(adapter->fw_name, card->pcie.firmware);
2333 * This function unregisters the PCIE device.
2335 * The PCIE IRQ is released, the function is disabled and driver
2336 * data is set to null.
2338 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
2340 struct pcie_service_card *card = adapter->card;
2341 const struct mwifiex_pcie_card_reg *reg;
2344 dev_dbg(adapter->dev, "%s(): calling free_irq()\n", __func__);
2345 free_irq(card->dev->irq, card->dev);
2347 reg = card->pcie.reg;
2348 if (reg->sleep_cookie)
2349 mwifiex_pcie_delete_sleep_cookie_buf(adapter);
2351 mwifiex_pcie_delete_cmdrsp_buf(adapter);
2352 mwifiex_pcie_delete_evtbd_ring(adapter);
2353 mwifiex_pcie_delete_rxbd_ring(adapter);
2354 mwifiex_pcie_delete_txbd_ring(adapter);
2355 card->cmdrsp_buf = NULL;
2359 static struct mwifiex_if_ops pcie_ops = {
2360 .init_if = mwifiex_pcie_init,
2361 .cleanup_if = mwifiex_pcie_cleanup,
2362 .check_fw_status = mwifiex_check_fw_status,
2363 .prog_fw = mwifiex_prog_fw_w_helper,
2364 .register_dev = mwifiex_register_dev,
2365 .unregister_dev = mwifiex_unregister_dev,
2366 .enable_int = mwifiex_pcie_enable_host_int,
2367 .process_int_status = mwifiex_process_int_status,
2368 .host_to_card = mwifiex_pcie_host_to_card,
2369 .wakeup = mwifiex_pm_wakeup_card,
2370 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
2373 .cmdrsp_complete = mwifiex_pcie_cmdrsp_complete,
2374 .event_complete = mwifiex_pcie_event_complete,
2375 .update_mp_end_port = NULL,
2376 .cleanup_mpa_buf = NULL,
2377 .init_fw_port = mwifiex_pcie_init_fw_port,
2378 .clean_pcie_ring = mwifiex_clean_pcie_ring_buf,
2382 * This function initializes the PCIE driver module.
2384 * This initiates the semaphore and registers the device with
2387 static int mwifiex_pcie_init_module(void)
2391 pr_debug("Marvell PCIe Driver\n");
2393 sema_init(&add_remove_card_sem, 1);
2395 /* Clear the flag in case user removes the card. */
2398 ret = pci_register_driver(&mwifiex_pcie);
2400 pr_err("Driver register failed!\n");
2402 pr_debug("info: Driver registered successfully!\n");
2408 * This function cleans up the PCIE driver.
2410 * The following major steps are followed for cleanup -
2411 * - Resume the device if its suspended
2412 * - Disconnect the device if connected
2413 * - Shutdown the firmware
2414 * - Unregister the device from PCIE bus.
2416 static void mwifiex_pcie_cleanup_module(void)
2418 if (!down_interruptible(&add_remove_card_sem))
2419 up(&add_remove_card_sem);
2421 /* Set the flag as user is removing this module. */
2424 pci_unregister_driver(&mwifiex_pcie);
2427 module_init(mwifiex_pcie_init_module);
2428 module_exit(mwifiex_pcie_cleanup_module);
2430 MODULE_AUTHOR("Marvell International Ltd.");
2431 MODULE_DESCRIPTION("Marvell WiFi-Ex PCI-Express Driver version " PCIE_VERSION);
2432 MODULE_VERSION(PCIE_VERSION);
2433 MODULE_LICENSE("GPL v2");
2434 MODULE_FIRMWARE(PCIE8766_DEFAULT_FW_NAME);
2435 MODULE_FIRMWARE(PCIE8897_DEFAULT_FW_NAME);