2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include <linux/pci.h>
19 #include <linux/module.h>
20 #include <linux/interrupt.h>
21 #include <linux/spinlock.h>
22 #include <linux/bitops.h>
27 #include "targaddrs.h"
36 enum ath10k_pci_irq_mode {
37 ATH10K_PCI_IRQ_AUTO = 0,
38 ATH10K_PCI_IRQ_LEGACY = 1,
39 ATH10K_PCI_IRQ_MSI = 2,
42 enum ath10k_pci_reset_mode {
43 ATH10K_PCI_RESET_AUTO = 0,
44 ATH10K_PCI_RESET_WARM_ONLY = 1,
47 static unsigned int ath10k_pci_irq_mode = ATH10K_PCI_IRQ_AUTO;
48 static unsigned int ath10k_pci_reset_mode = ATH10K_PCI_RESET_AUTO;
50 module_param_named(irq_mode, ath10k_pci_irq_mode, uint, 0644);
51 MODULE_PARM_DESC(irq_mode, "0: auto, 1: legacy, 2: msi (default: 0)");
53 module_param_named(reset_mode, ath10k_pci_reset_mode, uint, 0644);
54 MODULE_PARM_DESC(reset_mode, "0: auto, 1: warm only (default: 0)");
56 /* how long wait to wait for target to initialise, in ms */
57 #define ATH10K_PCI_TARGET_WAIT 3000
58 #define ATH10K_PCI_NUM_WARM_RESET_ATTEMPTS 3
60 #define QCA988X_2_0_DEVICE_ID (0x003c)
62 static const struct pci_device_id ath10k_pci_id_table[] = {
63 { PCI_VDEVICE(ATHEROS, QCA988X_2_0_DEVICE_ID) }, /* PCI-E QCA988X V2 */
67 static void ath10k_pci_buffer_cleanup(struct ath10k *ar);
68 static int ath10k_pci_cold_reset(struct ath10k *ar);
69 static int ath10k_pci_warm_reset(struct ath10k *ar);
70 static int ath10k_pci_wait_for_target_init(struct ath10k *ar);
71 static int ath10k_pci_init_irq(struct ath10k *ar);
72 static int ath10k_pci_deinit_irq(struct ath10k *ar);
73 static int ath10k_pci_request_irq(struct ath10k *ar);
74 static void ath10k_pci_free_irq(struct ath10k *ar);
75 static int ath10k_pci_bmi_wait(struct ath10k_ce_pipe *tx_pipe,
76 struct ath10k_ce_pipe *rx_pipe,
77 struct bmi_xfer *xfer);
79 static const struct ce_attr host_ce_config_wlan[] = {
80 /* CE0: host->target HTC control and raw streams */
82 .flags = CE_ATTR_FLAGS,
88 /* CE1: target->host HTT + HTC control */
90 .flags = CE_ATTR_FLAGS,
96 /* CE2: target->host WMI */
98 .flags = CE_ATTR_FLAGS,
104 /* CE3: host->target WMI */
106 .flags = CE_ATTR_FLAGS,
112 /* CE4: host->target HTT */
114 .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
115 .src_nentries = CE_HTT_H2T_MSG_SRC_NENTRIES,
122 .flags = CE_ATTR_FLAGS,
128 /* CE6: target autonomous hif_memcpy */
130 .flags = CE_ATTR_FLAGS,
136 /* CE7: ce_diag, the Diagnostic Window */
138 .flags = CE_ATTR_FLAGS,
140 .src_sz_max = DIAG_TRANSFER_LIMIT,
145 /* Target firmware's Copy Engine configuration. */
146 static const struct ce_pipe_config target_ce_config_wlan[] = {
147 /* CE0: host->target HTC control and raw streams */
149 .pipenum = __cpu_to_le32(0),
150 .pipedir = __cpu_to_le32(PIPEDIR_OUT),
151 .nentries = __cpu_to_le32(32),
152 .nbytes_max = __cpu_to_le32(256),
153 .flags = __cpu_to_le32(CE_ATTR_FLAGS),
154 .reserved = __cpu_to_le32(0),
157 /* CE1: target->host HTT + HTC control */
159 .pipenum = __cpu_to_le32(1),
160 .pipedir = __cpu_to_le32(PIPEDIR_IN),
161 .nentries = __cpu_to_le32(32),
162 .nbytes_max = __cpu_to_le32(512),
163 .flags = __cpu_to_le32(CE_ATTR_FLAGS),
164 .reserved = __cpu_to_le32(0),
167 /* CE2: target->host WMI */
169 .pipenum = __cpu_to_le32(2),
170 .pipedir = __cpu_to_le32(PIPEDIR_IN),
171 .nentries = __cpu_to_le32(32),
172 .nbytes_max = __cpu_to_le32(2048),
173 .flags = __cpu_to_le32(CE_ATTR_FLAGS),
174 .reserved = __cpu_to_le32(0),
177 /* CE3: host->target WMI */
179 .pipenum = __cpu_to_le32(3),
180 .pipedir = __cpu_to_le32(PIPEDIR_OUT),
181 .nentries = __cpu_to_le32(32),
182 .nbytes_max = __cpu_to_le32(2048),
183 .flags = __cpu_to_le32(CE_ATTR_FLAGS),
184 .reserved = __cpu_to_le32(0),
187 /* CE4: host->target HTT */
189 .pipenum = __cpu_to_le32(4),
190 .pipedir = __cpu_to_le32(PIPEDIR_OUT),
191 .nentries = __cpu_to_le32(256),
192 .nbytes_max = __cpu_to_le32(256),
193 .flags = __cpu_to_le32(CE_ATTR_FLAGS),
194 .reserved = __cpu_to_le32(0),
197 /* NB: 50% of src nentries, since tx has 2 frags */
201 .pipenum = __cpu_to_le32(5),
202 .pipedir = __cpu_to_le32(PIPEDIR_OUT),
203 .nentries = __cpu_to_le32(32),
204 .nbytes_max = __cpu_to_le32(2048),
205 .flags = __cpu_to_le32(CE_ATTR_FLAGS),
206 .reserved = __cpu_to_le32(0),
209 /* CE6: Reserved for target autonomous hif_memcpy */
211 .pipenum = __cpu_to_le32(6),
212 .pipedir = __cpu_to_le32(PIPEDIR_INOUT),
213 .nentries = __cpu_to_le32(32),
214 .nbytes_max = __cpu_to_le32(4096),
215 .flags = __cpu_to_le32(CE_ATTR_FLAGS),
216 .reserved = __cpu_to_le32(0),
219 /* CE7 used only by Host */
223 * Map from service/endpoint to Copy Engine.
224 * This table is derived from the CE_PCI TABLE, above.
225 * It is passed to the Target at startup for use by firmware.
227 static const struct service_to_pipe target_service_to_ce_map_wlan[] = {
229 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VO),
230 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
234 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VO),
235 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
239 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BK),
240 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
244 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BK),
245 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
249 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BE),
250 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
254 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BE),
255 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
259 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VI),
260 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
264 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VI),
265 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
269 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_CONTROL),
270 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
274 __cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_CONTROL),
275 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
279 __cpu_to_le32(ATH10K_HTC_SVC_ID_RSVD_CTRL),
280 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
284 __cpu_to_le32(ATH10K_HTC_SVC_ID_RSVD_CTRL),
285 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
289 __cpu_to_le32(ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS),
290 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
294 __cpu_to_le32(ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS),
295 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
299 __cpu_to_le32(ATH10K_HTC_SVC_ID_HTT_DATA_MSG),
300 __cpu_to_le32(PIPEDIR_OUT), /* out = UL = host -> target */
304 __cpu_to_le32(ATH10K_HTC_SVC_ID_HTT_DATA_MSG),
305 __cpu_to_le32(PIPEDIR_IN), /* in = DL = target -> host */
309 /* (Additions here) */
318 static bool ath10k_pci_irq_pending(struct ath10k *ar)
322 /* Check if the shared legacy irq is for us */
323 cause = ath10k_pci_read32(ar, SOC_CORE_BASE_ADDRESS +
324 PCIE_INTR_CAUSE_ADDRESS);
325 if (cause & (PCIE_INTR_FIRMWARE_MASK | PCIE_INTR_CE_MASK_ALL))
331 static void ath10k_pci_disable_and_clear_legacy_irq(struct ath10k *ar)
333 /* IMPORTANT: INTR_CLR register has to be set after
334 * INTR_ENABLE is set to 0, otherwise interrupt can not be
336 ath10k_pci_write32(ar, SOC_CORE_BASE_ADDRESS + PCIE_INTR_ENABLE_ADDRESS,
338 ath10k_pci_write32(ar, SOC_CORE_BASE_ADDRESS + PCIE_INTR_CLR_ADDRESS,
339 PCIE_INTR_FIRMWARE_MASK | PCIE_INTR_CE_MASK_ALL);
341 /* IMPORTANT: this extra read transaction is required to
342 * flush the posted write buffer. */
343 (void)ath10k_pci_read32(ar, SOC_CORE_BASE_ADDRESS +
344 PCIE_INTR_ENABLE_ADDRESS);
347 static void ath10k_pci_enable_legacy_irq(struct ath10k *ar)
349 ath10k_pci_write32(ar, SOC_CORE_BASE_ADDRESS +
350 PCIE_INTR_ENABLE_ADDRESS,
351 PCIE_INTR_FIRMWARE_MASK | PCIE_INTR_CE_MASK_ALL);
353 /* IMPORTANT: this extra read transaction is required to
354 * flush the posted write buffer. */
355 (void)ath10k_pci_read32(ar, SOC_CORE_BASE_ADDRESS +
356 PCIE_INTR_ENABLE_ADDRESS);
359 static inline const char *ath10k_pci_get_irq_method(struct ath10k *ar)
361 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
363 if (ar_pci->num_msi_intrs > 1)
366 if (ar_pci->num_msi_intrs == 1)
372 static int __ath10k_pci_rx_post_buf(struct ath10k_pci_pipe *pipe)
374 struct ath10k *ar = pipe->hif_ce_state;
375 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
376 struct ath10k_ce_pipe *ce_pipe = pipe->ce_hdl;
381 lockdep_assert_held(&ar_pci->ce_lock);
383 skb = dev_alloc_skb(pipe->buf_sz);
387 WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
389 paddr = dma_map_single(ar->dev, skb->data,
390 skb->len + skb_tailroom(skb),
392 if (unlikely(dma_mapping_error(ar->dev, paddr))) {
393 ath10k_warn(ar, "failed to dma map pci rx buf\n");
394 dev_kfree_skb_any(skb);
398 ATH10K_SKB_CB(skb)->paddr = paddr;
400 ret = __ath10k_ce_rx_post_buf(ce_pipe, skb, paddr);
402 ath10k_warn(ar, "failed to post pci rx buf: %d\n", ret);
403 dma_unmap_single(ar->dev, paddr, skb->len + skb_tailroom(skb),
405 dev_kfree_skb_any(skb);
412 static void __ath10k_pci_rx_post_pipe(struct ath10k_pci_pipe *pipe)
414 struct ath10k *ar = pipe->hif_ce_state;
415 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
416 struct ath10k_ce_pipe *ce_pipe = pipe->ce_hdl;
419 lockdep_assert_held(&ar_pci->ce_lock);
421 if (pipe->buf_sz == 0)
424 if (!ce_pipe->dest_ring)
427 num = __ath10k_ce_rx_num_free_bufs(ce_pipe);
429 ret = __ath10k_pci_rx_post_buf(pipe);
431 ath10k_warn(ar, "failed to post pci rx buf: %d\n", ret);
432 mod_timer(&ar_pci->rx_post_retry, jiffies +
433 ATH10K_PCI_RX_POST_RETRY_MS);
439 static void ath10k_pci_rx_post_pipe(struct ath10k_pci_pipe *pipe)
441 struct ath10k *ar = pipe->hif_ce_state;
442 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
444 spin_lock_bh(&ar_pci->ce_lock);
445 __ath10k_pci_rx_post_pipe(pipe);
446 spin_unlock_bh(&ar_pci->ce_lock);
449 static void ath10k_pci_rx_post(struct ath10k *ar)
451 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
454 spin_lock_bh(&ar_pci->ce_lock);
455 for (i = 0; i < CE_COUNT; i++)
456 __ath10k_pci_rx_post_pipe(&ar_pci->pipe_info[i]);
457 spin_unlock_bh(&ar_pci->ce_lock);
460 static void ath10k_pci_rx_replenish_retry(unsigned long ptr)
462 struct ath10k *ar = (void *)ptr;
464 ath10k_pci_rx_post(ar);
468 * Diagnostic read/write access is provided for startup/config/debug usage.
469 * Caller must guarantee proper alignment, when applicable, and single user
472 static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
475 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
478 unsigned int completed_nbytes, orig_nbytes, remaining_bytes;
481 struct ath10k_ce_pipe *ce_diag;
482 /* Host buffer address in CE space */
484 dma_addr_t ce_data_base = 0;
485 void *data_buf = NULL;
488 spin_lock_bh(&ar_pci->ce_lock);
490 ce_diag = ar_pci->ce_diag;
493 * Allocate a temporary bounce buffer to hold caller's data
494 * to be DMA'ed from Target. This guarantees
495 * 1) 4-byte alignment
496 * 2) Buffer in DMA-able space
498 orig_nbytes = nbytes;
499 data_buf = (unsigned char *)dma_alloc_coherent(ar->dev,
508 memset(data_buf, 0, orig_nbytes);
510 remaining_bytes = orig_nbytes;
511 ce_data = ce_data_base;
512 while (remaining_bytes) {
513 nbytes = min_t(unsigned int, remaining_bytes,
514 DIAG_TRANSFER_LIMIT);
516 ret = __ath10k_ce_rx_post_buf(ce_diag, NULL, ce_data);
520 /* Request CE to send from Target(!) address to Host buffer */
522 * The address supplied by the caller is in the
523 * Target CPU virtual address space.
525 * In order to use this address with the diagnostic CE,
526 * convert it from Target CPU virtual address space
527 * to CE address space
529 address = TARG_CPU_SPACE_TO_CE_SPACE(ar, ar_pci->mem,
532 ret = ath10k_ce_send_nolock(ce_diag, NULL, (u32)address, nbytes, 0,
538 while (ath10k_ce_completed_send_next_nolock(ce_diag, NULL, &buf,
542 if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
548 if (nbytes != completed_nbytes) {
553 if (buf != (u32)address) {
559 while (ath10k_ce_completed_recv_next_nolock(ce_diag, NULL, &buf,
564 if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
570 if (nbytes != completed_nbytes) {
575 if (buf != ce_data) {
580 remaining_bytes -= nbytes;
587 memcpy(data, data_buf, orig_nbytes);
589 ath10k_warn(ar, "failed to read diag value at 0x%x: %d\n",
593 dma_free_coherent(ar->dev, orig_nbytes, data_buf,
596 spin_unlock_bh(&ar_pci->ce_lock);
601 static int ath10k_pci_diag_read32(struct ath10k *ar, u32 address, u32 *value)
606 ret = ath10k_pci_diag_read_mem(ar, address, &val, sizeof(val));
607 *value = __le32_to_cpu(val);
612 static int __ath10k_pci_diag_read_hi(struct ath10k *ar, void *dest,
618 host_addr = host_interest_item_address(src);
620 ret = ath10k_pci_diag_read32(ar, host_addr, &addr);
622 ath10k_warn(ar, "failed to get memcpy hi address for firmware address %d: %d\n",
627 ret = ath10k_pci_diag_read_mem(ar, addr, dest, len);
629 ath10k_warn(ar, "failed to memcpy firmware memory from %d (%d B): %d\n",
637 #define ath10k_pci_diag_read_hi(ar, dest, src, len) \
638 __ath10k_pci_diag_read_hi(ar, dest, HI_ITEM(src), len)
640 static int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
641 const void *data, int nbytes)
643 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
646 unsigned int completed_nbytes, orig_nbytes, remaining_bytes;
649 struct ath10k_ce_pipe *ce_diag;
650 void *data_buf = NULL;
651 u32 ce_data; /* Host buffer address in CE space */
652 dma_addr_t ce_data_base = 0;
655 spin_lock_bh(&ar_pci->ce_lock);
657 ce_diag = ar_pci->ce_diag;
660 * Allocate a temporary bounce buffer to hold caller's data
661 * to be DMA'ed to Target. This guarantees
662 * 1) 4-byte alignment
663 * 2) Buffer in DMA-able space
665 orig_nbytes = nbytes;
666 data_buf = (unsigned char *)dma_alloc_coherent(ar->dev,
675 /* Copy caller's data to allocated DMA buf */
676 memcpy(data_buf, data, orig_nbytes);
679 * The address supplied by the caller is in the
680 * Target CPU virtual address space.
682 * In order to use this address with the diagnostic CE,
684 * Target CPU virtual address space
688 address = TARG_CPU_SPACE_TO_CE_SPACE(ar, ar_pci->mem, address);
690 remaining_bytes = orig_nbytes;
691 ce_data = ce_data_base;
692 while (remaining_bytes) {
693 /* FIXME: check cast */
694 nbytes = min_t(int, remaining_bytes, DIAG_TRANSFER_LIMIT);
696 /* Set up to receive directly into Target(!) address */
697 ret = __ath10k_ce_rx_post_buf(ce_diag, NULL, address);
702 * Request CE to send caller-supplied data that
703 * was copied to bounce buffer to Target(!) address.
705 ret = ath10k_ce_send_nolock(ce_diag, NULL, (u32)ce_data,
711 while (ath10k_ce_completed_send_next_nolock(ce_diag, NULL, &buf,
716 if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
722 if (nbytes != completed_nbytes) {
727 if (buf != ce_data) {
733 while (ath10k_ce_completed_recv_next_nolock(ce_diag, NULL, &buf,
738 if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
744 if (nbytes != completed_nbytes) {
749 if (buf != address) {
754 remaining_bytes -= nbytes;
761 dma_free_coherent(ar->dev, orig_nbytes, data_buf,
766 ath10k_warn(ar, "failed to write diag value at 0x%x: %d\n",
769 spin_unlock_bh(&ar_pci->ce_lock);
774 static int ath10k_pci_diag_write32(struct ath10k *ar, u32 address, u32 value)
776 __le32 val = __cpu_to_le32(value);
778 return ath10k_pci_diag_write_mem(ar, address, &val, sizeof(val));
781 static bool ath10k_pci_is_awake(struct ath10k *ar)
783 u32 val = ath10k_pci_reg_read32(ar, RTC_STATE_ADDRESS);
785 return RTC_STATE_V_GET(val) == RTC_STATE_V_ON;
788 static int ath10k_pci_wake_wait(struct ath10k *ar)
793 while (tot_delay < PCIE_WAKE_TIMEOUT) {
794 if (ath10k_pci_is_awake(ar))
798 tot_delay += curr_delay;
807 static int ath10k_pci_wake(struct ath10k *ar)
809 ath10k_pci_reg_write32(ar, PCIE_SOC_WAKE_ADDRESS,
810 PCIE_SOC_WAKE_V_MASK);
811 return ath10k_pci_wake_wait(ar);
814 static void ath10k_pci_sleep(struct ath10k *ar)
816 ath10k_pci_reg_write32(ar, PCIE_SOC_WAKE_ADDRESS,
817 PCIE_SOC_WAKE_RESET);
820 /* Called by lower (CE) layer when a send to Target completes. */
821 static void ath10k_pci_ce_send_done(struct ath10k_ce_pipe *ce_state)
823 struct ath10k *ar = ce_state->ar;
824 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
825 struct ath10k_hif_cb *cb = &ar_pci->msg_callbacks_current;
826 void *transfer_context;
829 unsigned int transfer_id;
831 while (ath10k_ce_completed_send_next(ce_state, &transfer_context,
833 &transfer_id) == 0) {
834 /* no need to call tx completion for NULL pointers */
835 if (transfer_context == NULL)
838 cb->tx_completion(ar, transfer_context, transfer_id);
842 /* Called by lower (CE) layer when data is received from the Target. */
843 static void ath10k_pci_ce_recv_data(struct ath10k_ce_pipe *ce_state)
845 struct ath10k *ar = ce_state->ar;
846 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
847 struct ath10k_pci_pipe *pipe_info = &ar_pci->pipe_info[ce_state->id];
848 struct ath10k_hif_cb *cb = &ar_pci->msg_callbacks_current;
850 void *transfer_context;
852 unsigned int nbytes, max_nbytes;
853 unsigned int transfer_id;
856 while (ath10k_ce_completed_recv_next(ce_state, &transfer_context,
857 &ce_data, &nbytes, &transfer_id,
859 skb = transfer_context;
860 max_nbytes = skb->len + skb_tailroom(skb);
861 dma_unmap_single(ar->dev, ATH10K_SKB_CB(skb)->paddr,
862 max_nbytes, DMA_FROM_DEVICE);
864 if (unlikely(max_nbytes < nbytes)) {
865 ath10k_warn(ar, "rxed more than expected (nbytes %d, max %d)",
867 dev_kfree_skb_any(skb);
871 skb_put(skb, nbytes);
873 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci rx ce pipe %d len %d\n",
874 ce_state->id, skb->len);
875 ath10k_dbg_dump(ar, ATH10K_DBG_PCI_DUMP, NULL, "pci rx: ",
876 skb->data, skb->len);
878 cb->rx_completion(ar, skb, pipe_info->pipe_num);
881 ath10k_pci_rx_post_pipe(pipe_info);
884 static int ath10k_pci_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
885 struct ath10k_hif_sg_item *items, int n_items)
887 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
888 struct ath10k_pci_pipe *pci_pipe = &ar_pci->pipe_info[pipe_id];
889 struct ath10k_ce_pipe *ce_pipe = pci_pipe->ce_hdl;
890 struct ath10k_ce_ring *src_ring = ce_pipe->src_ring;
891 unsigned int nentries_mask;
892 unsigned int sw_index;
893 unsigned int write_index;
896 spin_lock_bh(&ar_pci->ce_lock);
898 nentries_mask = src_ring->nentries_mask;
899 sw_index = src_ring->sw_index;
900 write_index = src_ring->write_index;
902 if (unlikely(CE_RING_DELTA(nentries_mask,
903 write_index, sw_index - 1) < n_items)) {
908 for (i = 0; i < n_items - 1; i++) {
909 ath10k_dbg(ar, ATH10K_DBG_PCI,
910 "pci tx item %d paddr 0x%08x len %d n_items %d\n",
911 i, items[i].paddr, items[i].len, n_items);
912 ath10k_dbg_dump(ar, ATH10K_DBG_PCI_DUMP, NULL, "pci tx data: ",
913 items[i].vaddr, items[i].len);
915 err = ath10k_ce_send_nolock(ce_pipe,
916 items[i].transfer_context,
919 items[i].transfer_id,
920 CE_SEND_FLAG_GATHER);
925 /* `i` is equal to `n_items -1` after for() */
927 ath10k_dbg(ar, ATH10K_DBG_PCI,
928 "pci tx item %d paddr 0x%08x len %d n_items %d\n",
929 i, items[i].paddr, items[i].len, n_items);
930 ath10k_dbg_dump(ar, ATH10K_DBG_PCI_DUMP, NULL, "pci tx data: ",
931 items[i].vaddr, items[i].len);
933 err = ath10k_ce_send_nolock(ce_pipe,
934 items[i].transfer_context,
937 items[i].transfer_id,
942 spin_unlock_bh(&ar_pci->ce_lock);
947 __ath10k_ce_send_revert(ce_pipe);
949 spin_unlock_bh(&ar_pci->ce_lock);
953 static int ath10k_pci_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
956 return ath10k_pci_diag_read_mem(ar, address, buf, buf_len);
959 static u16 ath10k_pci_hif_get_free_queue_number(struct ath10k *ar, u8 pipe)
961 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
963 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci hif get free queue number\n");
965 return ath10k_ce_num_free_src_entries(ar_pci->pipe_info[pipe].ce_hdl);
968 static void ath10k_pci_dump_registers(struct ath10k *ar,
969 struct ath10k_fw_crash_data *crash_data)
971 __le32 reg_dump_values[REG_DUMP_COUNT_QCA988X] = {};
974 lockdep_assert_held(&ar->data_lock);
976 ret = ath10k_pci_diag_read_hi(ar, ®_dump_values[0],
978 REG_DUMP_COUNT_QCA988X * sizeof(__le32));
980 ath10k_err(ar, "failed to read firmware dump area: %d\n", ret);
984 BUILD_BUG_ON(REG_DUMP_COUNT_QCA988X % 4);
986 ath10k_err(ar, "firmware register dump:\n");
987 for (i = 0; i < REG_DUMP_COUNT_QCA988X; i += 4)
988 ath10k_err(ar, "[%02d]: 0x%08X 0x%08X 0x%08X 0x%08X\n",
990 __le32_to_cpu(reg_dump_values[i]),
991 __le32_to_cpu(reg_dump_values[i + 1]),
992 __le32_to_cpu(reg_dump_values[i + 2]),
993 __le32_to_cpu(reg_dump_values[i + 3]));
998 for (i = 0; i < REG_DUMP_COUNT_QCA988X; i++)
999 crash_data->registers[i] = reg_dump_values[i];
1002 static void ath10k_pci_fw_crashed_dump(struct ath10k *ar)
1004 struct ath10k_fw_crash_data *crash_data;
1007 spin_lock_bh(&ar->data_lock);
1009 ar->stats.fw_crash_counter++;
1011 crash_data = ath10k_debug_get_new_fw_crash_data(ar);
1014 scnprintf(uuid, sizeof(uuid), "%pUl", &crash_data->uuid);
1016 scnprintf(uuid, sizeof(uuid), "n/a");
1018 ath10k_err(ar, "firmware crashed! (uuid %s)\n", uuid);
1019 ath10k_print_driver_info(ar);
1020 ath10k_pci_dump_registers(ar, crash_data);
1022 spin_unlock_bh(&ar->data_lock);
1024 queue_work(ar->workqueue, &ar->restart_work);
1027 static void ath10k_pci_hif_send_complete_check(struct ath10k *ar, u8 pipe,
1030 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci hif send complete check\n");
1035 * Decide whether to actually poll for completions, or just
1036 * wait for a later chance.
1037 * If there seem to be plenty of resources left, then just wait
1038 * since checking involves reading a CE register, which is a
1039 * relatively expensive operation.
1041 resources = ath10k_pci_hif_get_free_queue_number(ar, pipe);
1044 * If at least 50% of the total resources are still available,
1045 * don't bother checking again yet.
1047 if (resources > (host_ce_config_wlan[pipe].src_nentries >> 1))
1050 ath10k_ce_per_engine_service(ar, pipe);
1053 static void ath10k_pci_hif_set_callbacks(struct ath10k *ar,
1054 struct ath10k_hif_cb *callbacks)
1056 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1058 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci hif set callbacks\n");
1060 memcpy(&ar_pci->msg_callbacks_current, callbacks,
1061 sizeof(ar_pci->msg_callbacks_current));
1064 static void ath10k_pci_kill_tasklet(struct ath10k *ar)
1066 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1069 tasklet_kill(&ar_pci->intr_tq);
1070 tasklet_kill(&ar_pci->msi_fw_err);
1072 for (i = 0; i < CE_COUNT; i++)
1073 tasklet_kill(&ar_pci->pipe_info[i].intr);
1075 del_timer_sync(&ar_pci->rx_post_retry);
1078 static int ath10k_pci_hif_map_service_to_pipe(struct ath10k *ar,
1079 u16 service_id, u8 *ul_pipe,
1080 u8 *dl_pipe, int *ul_is_polled,
1083 const struct service_to_pipe *entry;
1084 bool ul_set = false, dl_set = false;
1087 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci hif map service\n");
1089 /* polling for received messages not supported */
1092 for (i = 0; i < ARRAY_SIZE(target_service_to_ce_map_wlan); i++) {
1093 entry = &target_service_to_ce_map_wlan[i];
1095 if (__le32_to_cpu(entry->service_id) != service_id)
1098 switch (__le32_to_cpu(entry->pipedir)) {
1103 *dl_pipe = __le32_to_cpu(entry->pipenum);
1108 *ul_pipe = __le32_to_cpu(entry->pipenum);
1114 *dl_pipe = __le32_to_cpu(entry->pipenum);
1115 *ul_pipe = __le32_to_cpu(entry->pipenum);
1122 if (WARN_ON(!ul_set || !dl_set))
1126 (host_ce_config_wlan[*ul_pipe].flags & CE_ATTR_DIS_INTR) != 0;
1131 static void ath10k_pci_hif_get_default_pipe(struct ath10k *ar,
1132 u8 *ul_pipe, u8 *dl_pipe)
1134 int ul_is_polled, dl_is_polled;
1136 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci hif get default pipe\n");
1138 (void)ath10k_pci_hif_map_service_to_pipe(ar,
1139 ATH10K_HTC_SVC_ID_RSVD_CTRL,
1146 static void ath10k_pci_irq_msi_fw_mask(struct ath10k *ar)
1150 val = ath10k_pci_read32(ar, SOC_CORE_BASE_ADDRESS + CORE_CTRL_ADDRESS);
1151 val &= ~CORE_CTRL_PCIE_REG_31_MASK;
1153 ath10k_pci_write32(ar, SOC_CORE_BASE_ADDRESS + CORE_CTRL_ADDRESS, val);
1156 static void ath10k_pci_irq_msi_fw_unmask(struct ath10k *ar)
1160 val = ath10k_pci_read32(ar, SOC_CORE_BASE_ADDRESS + CORE_CTRL_ADDRESS);
1161 val |= CORE_CTRL_PCIE_REG_31_MASK;
1163 ath10k_pci_write32(ar, SOC_CORE_BASE_ADDRESS + CORE_CTRL_ADDRESS, val);
1166 static void ath10k_pci_irq_disable(struct ath10k *ar)
1168 ath10k_ce_disable_interrupts(ar);
1169 ath10k_pci_disable_and_clear_legacy_irq(ar);
1170 ath10k_pci_irq_msi_fw_mask(ar);
1173 static void ath10k_pci_irq_sync(struct ath10k *ar)
1175 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1178 for (i = 0; i < max(1, ar_pci->num_msi_intrs); i++)
1179 synchronize_irq(ar_pci->pdev->irq + i);
1182 static void ath10k_pci_irq_enable(struct ath10k *ar)
1184 ath10k_ce_enable_interrupts(ar);
1185 ath10k_pci_enable_legacy_irq(ar);
1186 ath10k_pci_irq_msi_fw_unmask(ar);
1189 static int ath10k_pci_hif_start(struct ath10k *ar)
1191 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif start\n");
1193 ath10k_pci_irq_enable(ar);
1194 ath10k_pci_rx_post(ar);
1199 static void ath10k_pci_rx_pipe_cleanup(struct ath10k_pci_pipe *pci_pipe)
1202 struct ath10k_ce_pipe *ce_pipe;
1203 struct ath10k_ce_ring *ce_ring;
1204 struct sk_buff *skb;
1207 ar = pci_pipe->hif_ce_state;
1208 ce_pipe = pci_pipe->ce_hdl;
1209 ce_ring = ce_pipe->dest_ring;
1214 if (!pci_pipe->buf_sz)
1217 for (i = 0; i < ce_ring->nentries; i++) {
1218 skb = ce_ring->per_transfer_context[i];
1222 ce_ring->per_transfer_context[i] = NULL;
1224 dma_unmap_single(ar->dev, ATH10K_SKB_CB(skb)->paddr,
1225 skb->len + skb_tailroom(skb),
1227 dev_kfree_skb_any(skb);
1231 static void ath10k_pci_tx_pipe_cleanup(struct ath10k_pci_pipe *pci_pipe)
1234 struct ath10k_pci *ar_pci;
1235 struct ath10k_ce_pipe *ce_pipe;
1236 struct ath10k_ce_ring *ce_ring;
1237 struct ce_desc *ce_desc;
1238 struct sk_buff *skb;
1242 ar = pci_pipe->hif_ce_state;
1243 ar_pci = ath10k_pci_priv(ar);
1244 ce_pipe = pci_pipe->ce_hdl;
1245 ce_ring = ce_pipe->src_ring;
1250 if (!pci_pipe->buf_sz)
1253 ce_desc = ce_ring->shadow_base;
1254 if (WARN_ON(!ce_desc))
1257 for (i = 0; i < ce_ring->nentries; i++) {
1258 skb = ce_ring->per_transfer_context[i];
1262 ce_ring->per_transfer_context[i] = NULL;
1263 id = MS(__le16_to_cpu(ce_desc[i].flags),
1264 CE_DESC_FLAGS_META_DATA);
1266 ar_pci->msg_callbacks_current.tx_completion(ar, skb, id);
1271 * Cleanup residual buffers for device shutdown:
1272 * buffers that were enqueued for receive
1273 * buffers that were to be sent
1274 * Note: Buffers that had completed but which were
1275 * not yet processed are on a completion queue. They
1276 * are handled when the completion thread shuts down.
1278 static void ath10k_pci_buffer_cleanup(struct ath10k *ar)
1280 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1283 for (pipe_num = 0; pipe_num < CE_COUNT; pipe_num++) {
1284 struct ath10k_pci_pipe *pipe_info;
1286 pipe_info = &ar_pci->pipe_info[pipe_num];
1287 ath10k_pci_rx_pipe_cleanup(pipe_info);
1288 ath10k_pci_tx_pipe_cleanup(pipe_info);
1292 static void ath10k_pci_ce_deinit(struct ath10k *ar)
1296 for (i = 0; i < CE_COUNT; i++)
1297 ath10k_ce_deinit_pipe(ar, i);
1300 static void ath10k_pci_flush(struct ath10k *ar)
1302 ath10k_pci_kill_tasklet(ar);
1303 ath10k_pci_buffer_cleanup(ar);
1306 static void ath10k_pci_hif_stop(struct ath10k *ar)
1308 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif stop\n");
1310 /* Most likely the device has HTT Rx ring configured. The only way to
1311 * prevent the device from accessing (and possible corrupting) host
1312 * memory is to reset the chip now.
1314 * There's also no known way of masking MSI interrupts on the device.
1315 * For ranged MSI the CE-related interrupts can be masked. However
1316 * regardless how many MSI interrupts are assigned the first one
1317 * is always used for firmware indications (crashes) and cannot be
1318 * masked. To prevent the device from asserting the interrupt reset it
1319 * before proceeding with cleanup.
1321 ath10k_pci_warm_reset(ar);
1323 ath10k_pci_irq_disable(ar);
1324 ath10k_pci_irq_sync(ar);
1325 ath10k_pci_flush(ar);
1328 static int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar,
1329 void *req, u32 req_len,
1330 void *resp, u32 *resp_len)
1332 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1333 struct ath10k_pci_pipe *pci_tx = &ar_pci->pipe_info[BMI_CE_NUM_TO_TARG];
1334 struct ath10k_pci_pipe *pci_rx = &ar_pci->pipe_info[BMI_CE_NUM_TO_HOST];
1335 struct ath10k_ce_pipe *ce_tx = pci_tx->ce_hdl;
1336 struct ath10k_ce_pipe *ce_rx = pci_rx->ce_hdl;
1337 dma_addr_t req_paddr = 0;
1338 dma_addr_t resp_paddr = 0;
1339 struct bmi_xfer xfer = {};
1340 void *treq, *tresp = NULL;
1345 if (resp && !resp_len)
1348 if (resp && resp_len && *resp_len == 0)
1351 treq = kmemdup(req, req_len, GFP_KERNEL);
1355 req_paddr = dma_map_single(ar->dev, treq, req_len, DMA_TO_DEVICE);
1356 ret = dma_mapping_error(ar->dev, req_paddr);
1360 if (resp && resp_len) {
1361 tresp = kzalloc(*resp_len, GFP_KERNEL);
1367 resp_paddr = dma_map_single(ar->dev, tresp, *resp_len,
1369 ret = dma_mapping_error(ar->dev, resp_paddr);
1373 xfer.wait_for_resp = true;
1376 ath10k_ce_rx_post_buf(ce_rx, &xfer, resp_paddr);
1379 ret = ath10k_ce_send(ce_tx, &xfer, req_paddr, req_len, -1, 0);
1383 ret = ath10k_pci_bmi_wait(ce_tx, ce_rx, &xfer);
1386 unsigned int unused_nbytes;
1387 unsigned int unused_id;
1389 ath10k_ce_cancel_send_next(ce_tx, NULL, &unused_buffer,
1390 &unused_nbytes, &unused_id);
1392 /* non-zero means we did not time out */
1400 ath10k_ce_revoke_recv_next(ce_rx, NULL, &unused_buffer);
1401 dma_unmap_single(ar->dev, resp_paddr,
1402 *resp_len, DMA_FROM_DEVICE);
1405 dma_unmap_single(ar->dev, req_paddr, req_len, DMA_TO_DEVICE);
1407 if (ret == 0 && resp_len) {
1408 *resp_len = min(*resp_len, xfer.resp_len);
1409 memcpy(resp, tresp, xfer.resp_len);
1418 static void ath10k_pci_bmi_send_done(struct ath10k_ce_pipe *ce_state)
1420 struct bmi_xfer *xfer;
1422 unsigned int nbytes;
1423 unsigned int transfer_id;
1425 if (ath10k_ce_completed_send_next(ce_state, (void **)&xfer, &ce_data,
1426 &nbytes, &transfer_id))
1429 xfer->tx_done = true;
1432 static void ath10k_pci_bmi_recv_data(struct ath10k_ce_pipe *ce_state)
1434 struct ath10k *ar = ce_state->ar;
1435 struct bmi_xfer *xfer;
1437 unsigned int nbytes;
1438 unsigned int transfer_id;
1441 if (ath10k_ce_completed_recv_next(ce_state, (void **)&xfer, &ce_data,
1442 &nbytes, &transfer_id, &flags))
1445 if (WARN_ON_ONCE(!xfer))
1448 if (!xfer->wait_for_resp) {
1449 ath10k_warn(ar, "unexpected: BMI data received; ignoring\n");
1453 xfer->resp_len = nbytes;
1454 xfer->rx_done = true;
1457 static int ath10k_pci_bmi_wait(struct ath10k_ce_pipe *tx_pipe,
1458 struct ath10k_ce_pipe *rx_pipe,
1459 struct bmi_xfer *xfer)
1461 unsigned long timeout = jiffies + BMI_COMMUNICATION_TIMEOUT_HZ;
1463 while (time_before_eq(jiffies, timeout)) {
1464 ath10k_pci_bmi_send_done(tx_pipe);
1465 ath10k_pci_bmi_recv_data(rx_pipe);
1467 if (xfer->tx_done && (xfer->rx_done == xfer->wait_for_resp))
1477 * Send an interrupt to the device to wake up the Target CPU
1478 * so it has an opportunity to notice any changed state.
1480 static int ath10k_pci_wake_target_cpu(struct ath10k *ar)
1484 addr = SOC_CORE_BASE_ADDRESS | CORE_CTRL_ADDRESS;
1485 val = ath10k_pci_read32(ar, addr);
1486 val |= CORE_CTRL_CPU_INTR_MASK;
1487 ath10k_pci_write32(ar, addr, val);
1492 static int ath10k_pci_init_config(struct ath10k *ar)
1494 u32 interconnect_targ_addr;
1495 u32 pcie_state_targ_addr = 0;
1496 u32 pipe_cfg_targ_addr = 0;
1497 u32 svc_to_pipe_map = 0;
1498 u32 pcie_config_flags = 0;
1500 u32 ealloc_targ_addr;
1502 u32 flag2_targ_addr;
1505 /* Download to Target the CE Config and the service-to-CE map */
1506 interconnect_targ_addr =
1507 host_interest_item_address(HI_ITEM(hi_interconnect_state));
1509 /* Supply Target-side CE configuration */
1510 ret = ath10k_pci_diag_read32(ar, interconnect_targ_addr,
1511 &pcie_state_targ_addr);
1513 ath10k_err(ar, "Failed to get pcie state addr: %d\n", ret);
1517 if (pcie_state_targ_addr == 0) {
1519 ath10k_err(ar, "Invalid pcie state addr\n");
1523 ret = ath10k_pci_diag_read32(ar, (pcie_state_targ_addr +
1524 offsetof(struct pcie_state,
1526 &pipe_cfg_targ_addr);
1528 ath10k_err(ar, "Failed to get pipe cfg addr: %d\n", ret);
1532 if (pipe_cfg_targ_addr == 0) {
1534 ath10k_err(ar, "Invalid pipe cfg addr\n");
1538 ret = ath10k_pci_diag_write_mem(ar, pipe_cfg_targ_addr,
1539 target_ce_config_wlan,
1540 sizeof(target_ce_config_wlan));
1543 ath10k_err(ar, "Failed to write pipe cfg: %d\n", ret);
1547 ret = ath10k_pci_diag_read32(ar, (pcie_state_targ_addr +
1548 offsetof(struct pcie_state,
1552 ath10k_err(ar, "Failed to get svc/pipe map: %d\n", ret);
1556 if (svc_to_pipe_map == 0) {
1558 ath10k_err(ar, "Invalid svc_to_pipe map\n");
1562 ret = ath10k_pci_diag_write_mem(ar, svc_to_pipe_map,
1563 target_service_to_ce_map_wlan,
1564 sizeof(target_service_to_ce_map_wlan));
1566 ath10k_err(ar, "Failed to write svc/pipe map: %d\n", ret);
1570 ret = ath10k_pci_diag_read32(ar, (pcie_state_targ_addr +
1571 offsetof(struct pcie_state,
1573 &pcie_config_flags);
1575 ath10k_err(ar, "Failed to get pcie config_flags: %d\n", ret);
1579 pcie_config_flags &= ~PCIE_CONFIG_FLAG_ENABLE_L1;
1581 ret = ath10k_pci_diag_write32(ar, (pcie_state_targ_addr +
1582 offsetof(struct pcie_state,
1586 ath10k_err(ar, "Failed to write pcie config_flags: %d\n", ret);
1590 /* configure early allocation */
1591 ealloc_targ_addr = host_interest_item_address(HI_ITEM(hi_early_alloc));
1593 ret = ath10k_pci_diag_read32(ar, ealloc_targ_addr, &ealloc_value);
1595 ath10k_err(ar, "Faile to get early alloc val: %d\n", ret);
1599 /* first bank is switched to IRAM */
1600 ealloc_value |= ((HI_EARLY_ALLOC_MAGIC << HI_EARLY_ALLOC_MAGIC_SHIFT) &
1601 HI_EARLY_ALLOC_MAGIC_MASK);
1602 ealloc_value |= ((1 << HI_EARLY_ALLOC_IRAM_BANKS_SHIFT) &
1603 HI_EARLY_ALLOC_IRAM_BANKS_MASK);
1605 ret = ath10k_pci_diag_write32(ar, ealloc_targ_addr, ealloc_value);
1607 ath10k_err(ar, "Failed to set early alloc val: %d\n", ret);
1611 /* Tell Target to proceed with initialization */
1612 flag2_targ_addr = host_interest_item_address(HI_ITEM(hi_option_flag2));
1614 ret = ath10k_pci_diag_read32(ar, flag2_targ_addr, &flag2_value);
1616 ath10k_err(ar, "Failed to get option val: %d\n", ret);
1620 flag2_value |= HI_OPTION_EARLY_CFG_DONE;
1622 ret = ath10k_pci_diag_write32(ar, flag2_targ_addr, flag2_value);
1624 ath10k_err(ar, "Failed to set option val: %d\n", ret);
1631 static int ath10k_pci_alloc_pipes(struct ath10k *ar)
1633 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1634 struct ath10k_pci_pipe *pipe;
1637 for (i = 0; i < CE_COUNT; i++) {
1638 pipe = &ar_pci->pipe_info[i];
1639 pipe->ce_hdl = &ar_pci->ce_states[i];
1641 pipe->hif_ce_state = ar;
1643 ret = ath10k_ce_alloc_pipe(ar, i, &host_ce_config_wlan[i],
1644 ath10k_pci_ce_send_done,
1645 ath10k_pci_ce_recv_data);
1647 ath10k_err(ar, "failed to allocate copy engine pipe %d: %d\n",
1652 /* Last CE is Diagnostic Window */
1653 if (i == CE_COUNT - 1) {
1654 ar_pci->ce_diag = pipe->ce_hdl;
1658 pipe->buf_sz = (size_t)(host_ce_config_wlan[i].src_sz_max);
1664 static void ath10k_pci_free_pipes(struct ath10k *ar)
1668 for (i = 0; i < CE_COUNT; i++)
1669 ath10k_ce_free_pipe(ar, i);
1672 static int ath10k_pci_init_pipes(struct ath10k *ar)
1676 for (i = 0; i < CE_COUNT; i++) {
1677 ret = ath10k_ce_init_pipe(ar, i, &host_ce_config_wlan[i]);
1679 ath10k_err(ar, "failed to initialize copy engine pipe %d: %d\n",
1688 static bool ath10k_pci_has_fw_crashed(struct ath10k *ar)
1690 return ath10k_pci_read32(ar, FW_INDICATOR_ADDRESS) &
1691 FW_IND_EVENT_PENDING;
1694 static void ath10k_pci_fw_crashed_clear(struct ath10k *ar)
1698 val = ath10k_pci_read32(ar, FW_INDICATOR_ADDRESS);
1699 val &= ~FW_IND_EVENT_PENDING;
1700 ath10k_pci_write32(ar, FW_INDICATOR_ADDRESS, val);
1703 /* this function effectively clears target memory controller assert line */
1704 static void ath10k_pci_warm_reset_si0(struct ath10k *ar)
1708 val = ath10k_pci_soc_read32(ar, SOC_RESET_CONTROL_ADDRESS);
1709 ath10k_pci_soc_write32(ar, SOC_RESET_CONTROL_ADDRESS,
1710 val | SOC_RESET_CONTROL_SI0_RST_MASK);
1711 val = ath10k_pci_soc_read32(ar, SOC_RESET_CONTROL_ADDRESS);
1715 val = ath10k_pci_soc_read32(ar, SOC_RESET_CONTROL_ADDRESS);
1716 ath10k_pci_soc_write32(ar, SOC_RESET_CONTROL_ADDRESS,
1717 val & ~SOC_RESET_CONTROL_SI0_RST_MASK);
1718 val = ath10k_pci_soc_read32(ar, SOC_RESET_CONTROL_ADDRESS);
1723 static void ath10k_pci_warm_reset_cpu(struct ath10k *ar)
1727 ath10k_pci_write32(ar, FW_INDICATOR_ADDRESS, 0);
1729 val = ath10k_pci_read32(ar, RTC_SOC_BASE_ADDRESS +
1730 SOC_RESET_CONTROL_ADDRESS);
1731 ath10k_pci_write32(ar, RTC_SOC_BASE_ADDRESS + SOC_RESET_CONTROL_ADDRESS,
1732 val | SOC_RESET_CONTROL_CPU_WARM_RST_MASK);
1735 static void ath10k_pci_warm_reset_ce(struct ath10k *ar)
1739 val = ath10k_pci_read32(ar, RTC_SOC_BASE_ADDRESS +
1740 SOC_RESET_CONTROL_ADDRESS);
1742 ath10k_pci_write32(ar, RTC_SOC_BASE_ADDRESS + SOC_RESET_CONTROL_ADDRESS,
1743 val | SOC_RESET_CONTROL_CE_RST_MASK);
1745 ath10k_pci_write32(ar, RTC_SOC_BASE_ADDRESS + SOC_RESET_CONTROL_ADDRESS,
1746 val & ~SOC_RESET_CONTROL_CE_RST_MASK);
1749 static void ath10k_pci_warm_reset_clear_lf(struct ath10k *ar)
1753 val = ath10k_pci_read32(ar, RTC_SOC_BASE_ADDRESS +
1754 SOC_LF_TIMER_CONTROL0_ADDRESS);
1755 ath10k_pci_write32(ar, RTC_SOC_BASE_ADDRESS +
1756 SOC_LF_TIMER_CONTROL0_ADDRESS,
1757 val & ~SOC_LF_TIMER_CONTROL0_ENABLE_MASK);
1760 static int ath10k_pci_warm_reset(struct ath10k *ar)
1764 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot warm reset\n");
1766 spin_lock_bh(&ar->data_lock);
1767 ar->stats.fw_warm_reset_counter++;
1768 spin_unlock_bh(&ar->data_lock);
1770 ath10k_pci_irq_disable(ar);
1772 /* Make sure the target CPU is not doing anything dangerous, e.g. if it
1773 * were to access copy engine while host performs copy engine reset
1774 * then it is possible for the device to confuse pci-e controller to
1775 * the point of bringing host system to a complete stop (i.e. hang).
1777 ath10k_pci_warm_reset_si0(ar);
1778 ath10k_pci_warm_reset_cpu(ar);
1779 ath10k_pci_init_pipes(ar);
1780 ath10k_pci_wait_for_target_init(ar);
1782 ath10k_pci_warm_reset_clear_lf(ar);
1783 ath10k_pci_warm_reset_ce(ar);
1784 ath10k_pci_warm_reset_cpu(ar);
1785 ath10k_pci_init_pipes(ar);
1787 ret = ath10k_pci_wait_for_target_init(ar);
1789 ath10k_warn(ar, "failed to wait for target init: %d\n", ret);
1793 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot warm reset complete\n");
1798 static int ath10k_pci_chip_reset(struct ath10k *ar)
1803 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot chip reset\n");
1805 /* Some hardware revisions (e.g. CUS223v2) has issues with cold reset.
1806 * It is thus preferred to use warm reset which is safer but may not be
1807 * able to recover the device from all possible fail scenarios.
1809 * Warm reset doesn't always work on first try so attempt it a few
1810 * times before giving up.
1812 for (i = 0; i < ATH10K_PCI_NUM_WARM_RESET_ATTEMPTS; i++) {
1813 ret = ath10k_pci_warm_reset(ar);
1815 ath10k_warn(ar, "failed to warm reset attempt %d of %d: %d\n",
1816 i + 1, ATH10K_PCI_NUM_WARM_RESET_ATTEMPTS,
1821 /* FIXME: Sometimes copy engine doesn't recover after warm
1822 * reset. In most cases this needs cold reset. In some of these
1823 * cases the device is in such a state that a cold reset may
1826 * Reading any host interest register via copy engine is
1827 * sufficient to verify if device is capable of booting
1830 ret = ath10k_pci_init_pipes(ar);
1832 ath10k_warn(ar, "failed to init copy engine: %d\n",
1837 ret = ath10k_pci_diag_read32(ar, QCA988X_HOST_INTEREST_ADDRESS,
1840 ath10k_warn(ar, "failed to poke copy engine: %d\n",
1845 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot chip reset complete (warm)\n");
1849 if (ath10k_pci_reset_mode == ATH10K_PCI_RESET_WARM_ONLY) {
1850 ath10k_warn(ar, "refusing cold reset as requested\n");
1854 ret = ath10k_pci_cold_reset(ar);
1856 ath10k_warn(ar, "failed to cold reset: %d\n", ret);
1860 ret = ath10k_pci_wait_for_target_init(ar);
1862 ath10k_warn(ar, "failed to wait for target after cold reset: %d\n",
1867 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot chip reset complete (cold)\n");
1872 static int ath10k_pci_hif_power_up(struct ath10k *ar)
1876 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif power up\n");
1878 ret = ath10k_pci_wake(ar);
1880 ath10k_err(ar, "failed to wake up target: %d\n", ret);
1885 * Bring the target up cleanly.
1887 * The target may be in an undefined state with an AUX-powered Target
1888 * and a Host in WoW mode. If the Host crashes, loses power, or is
1889 * restarted (without unloading the driver) then the Target is left
1890 * (aux) powered and running. On a subsequent driver load, the Target
1891 * is in an unexpected state. We try to catch that here in order to
1892 * reset the Target and retry the probe.
1894 ret = ath10k_pci_chip_reset(ar);
1896 ath10k_err(ar, "failed to reset chip: %d\n", ret);
1900 ret = ath10k_pci_init_pipes(ar);
1902 ath10k_err(ar, "failed to initialize CE: %d\n", ret);
1906 ret = ath10k_pci_init_config(ar);
1908 ath10k_err(ar, "failed to setup init config: %d\n", ret);
1912 ret = ath10k_pci_wake_target_cpu(ar);
1914 ath10k_err(ar, "could not wake up target CPU: %d\n", ret);
1921 ath10k_pci_ce_deinit(ar);
1924 ath10k_pci_sleep(ar);
1928 static void ath10k_pci_hif_power_down(struct ath10k *ar)
1930 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif power down\n");
1932 /* Currently hif_power_up performs effectively a reset and hif_stop
1933 * resets the chip as well so there's no point in resetting here.
1936 ath10k_pci_sleep(ar);
1941 #define ATH10K_PCI_PM_CONTROL 0x44
1943 static int ath10k_pci_hif_suspend(struct ath10k *ar)
1945 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1946 struct pci_dev *pdev = ar_pci->pdev;
1949 pci_read_config_dword(pdev, ATH10K_PCI_PM_CONTROL, &val);
1951 if ((val & 0x000000ff) != 0x3) {
1952 pci_save_state(pdev);
1953 pci_disable_device(pdev);
1954 pci_write_config_dword(pdev, ATH10K_PCI_PM_CONTROL,
1955 (val & 0xffffff00) | 0x03);
1961 static int ath10k_pci_hif_resume(struct ath10k *ar)
1963 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1964 struct pci_dev *pdev = ar_pci->pdev;
1967 pci_read_config_dword(pdev, ATH10K_PCI_PM_CONTROL, &val);
1969 if ((val & 0x000000ff) != 0) {
1970 pci_restore_state(pdev);
1971 pci_write_config_dword(pdev, ATH10K_PCI_PM_CONTROL,
1974 * Suspend/Resume resets the PCI configuration space,
1975 * so we have to re-disable the RETRY_TIMEOUT register (0x41)
1976 * to keep PCI Tx retries from interfering with C3 CPU state
1978 pci_read_config_dword(pdev, 0x40, &val);
1980 if ((val & 0x0000ff00) != 0)
1981 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1988 static const struct ath10k_hif_ops ath10k_pci_hif_ops = {
1989 .tx_sg = ath10k_pci_hif_tx_sg,
1990 .diag_read = ath10k_pci_hif_diag_read,
1991 .exchange_bmi_msg = ath10k_pci_hif_exchange_bmi_msg,
1992 .start = ath10k_pci_hif_start,
1993 .stop = ath10k_pci_hif_stop,
1994 .map_service_to_pipe = ath10k_pci_hif_map_service_to_pipe,
1995 .get_default_pipe = ath10k_pci_hif_get_default_pipe,
1996 .send_complete_check = ath10k_pci_hif_send_complete_check,
1997 .set_callbacks = ath10k_pci_hif_set_callbacks,
1998 .get_free_queue_number = ath10k_pci_hif_get_free_queue_number,
1999 .power_up = ath10k_pci_hif_power_up,
2000 .power_down = ath10k_pci_hif_power_down,
2001 .read32 = ath10k_pci_read32,
2002 .write32 = ath10k_pci_write32,
2004 .suspend = ath10k_pci_hif_suspend,
2005 .resume = ath10k_pci_hif_resume,
2009 static void ath10k_pci_ce_tasklet(unsigned long ptr)
2011 struct ath10k_pci_pipe *pipe = (struct ath10k_pci_pipe *)ptr;
2012 struct ath10k_pci *ar_pci = pipe->ar_pci;
2014 ath10k_ce_per_engine_service(ar_pci->ar, pipe->pipe_num);
2017 static void ath10k_msi_err_tasklet(unsigned long data)
2019 struct ath10k *ar = (struct ath10k *)data;
2021 if (!ath10k_pci_has_fw_crashed(ar)) {
2022 ath10k_warn(ar, "received unsolicited fw crash interrupt\n");
2026 ath10k_pci_fw_crashed_clear(ar);
2027 ath10k_pci_fw_crashed_dump(ar);
2031 * Handler for a per-engine interrupt on a PARTICULAR CE.
2032 * This is used in cases where each CE has a private MSI interrupt.
2034 static irqreturn_t ath10k_pci_per_engine_handler(int irq, void *arg)
2036 struct ath10k *ar = arg;
2037 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2038 int ce_id = irq - ar_pci->pdev->irq - MSI_ASSIGN_CE_INITIAL;
2040 if (ce_id < 0 || ce_id >= ARRAY_SIZE(ar_pci->pipe_info)) {
2041 ath10k_warn(ar, "unexpected/invalid irq %d ce_id %d\n", irq,
2047 * NOTE: We are able to derive ce_id from irq because we
2048 * use a one-to-one mapping for CE's 0..5.
2049 * CE's 6 & 7 do not use interrupts at all.
2051 * This mapping must be kept in sync with the mapping
2054 tasklet_schedule(&ar_pci->pipe_info[ce_id].intr);
2058 static irqreturn_t ath10k_pci_msi_fw_handler(int irq, void *arg)
2060 struct ath10k *ar = arg;
2061 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2063 tasklet_schedule(&ar_pci->msi_fw_err);
2068 * Top-level interrupt handler for all PCI interrupts from a Target.
2069 * When a block of MSI interrupts is allocated, this top-level handler
2070 * is not used; instead, we directly call the correct sub-handler.
2072 static irqreturn_t ath10k_pci_interrupt_handler(int irq, void *arg)
2074 struct ath10k *ar = arg;
2075 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2077 if (ar_pci->num_msi_intrs == 0) {
2078 if (!ath10k_pci_irq_pending(ar))
2081 ath10k_pci_disable_and_clear_legacy_irq(ar);
2084 tasklet_schedule(&ar_pci->intr_tq);
2089 static void ath10k_pci_tasklet(unsigned long data)
2091 struct ath10k *ar = (struct ath10k *)data;
2092 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2094 if (ath10k_pci_has_fw_crashed(ar)) {
2095 ath10k_pci_fw_crashed_clear(ar);
2096 ath10k_pci_fw_crashed_dump(ar);
2100 ath10k_ce_per_engine_service_any(ar);
2102 /* Re-enable legacy irq that was disabled in the irq handler */
2103 if (ar_pci->num_msi_intrs == 0)
2104 ath10k_pci_enable_legacy_irq(ar);
2107 static int ath10k_pci_request_irq_msix(struct ath10k *ar)
2109 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2112 ret = request_irq(ar_pci->pdev->irq + MSI_ASSIGN_FW,
2113 ath10k_pci_msi_fw_handler,
2114 IRQF_SHARED, "ath10k_pci", ar);
2116 ath10k_warn(ar, "failed to request MSI-X fw irq %d: %d\n",
2117 ar_pci->pdev->irq + MSI_ASSIGN_FW, ret);
2121 for (i = MSI_ASSIGN_CE_INITIAL; i <= MSI_ASSIGN_CE_MAX; i++) {
2122 ret = request_irq(ar_pci->pdev->irq + i,
2123 ath10k_pci_per_engine_handler,
2124 IRQF_SHARED, "ath10k_pci", ar);
2126 ath10k_warn(ar, "failed to request MSI-X ce irq %d: %d\n",
2127 ar_pci->pdev->irq + i, ret);
2129 for (i--; i >= MSI_ASSIGN_CE_INITIAL; i--)
2130 free_irq(ar_pci->pdev->irq + i, ar);
2132 free_irq(ar_pci->pdev->irq + MSI_ASSIGN_FW, ar);
2140 static int ath10k_pci_request_irq_msi(struct ath10k *ar)
2142 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2145 ret = request_irq(ar_pci->pdev->irq,
2146 ath10k_pci_interrupt_handler,
2147 IRQF_SHARED, "ath10k_pci", ar);
2149 ath10k_warn(ar, "failed to request MSI irq %d: %d\n",
2150 ar_pci->pdev->irq, ret);
2157 static int ath10k_pci_request_irq_legacy(struct ath10k *ar)
2159 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2162 ret = request_irq(ar_pci->pdev->irq,
2163 ath10k_pci_interrupt_handler,
2164 IRQF_SHARED, "ath10k_pci", ar);
2166 ath10k_warn(ar, "failed to request legacy irq %d: %d\n",
2167 ar_pci->pdev->irq, ret);
2174 static int ath10k_pci_request_irq(struct ath10k *ar)
2176 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2178 switch (ar_pci->num_msi_intrs) {
2180 return ath10k_pci_request_irq_legacy(ar);
2182 return ath10k_pci_request_irq_msi(ar);
2183 case MSI_NUM_REQUEST:
2184 return ath10k_pci_request_irq_msix(ar);
2187 ath10k_warn(ar, "unknown irq configuration upon request\n");
2191 static void ath10k_pci_free_irq(struct ath10k *ar)
2193 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2196 /* There's at least one interrupt irregardless whether its legacy INTR
2197 * or MSI or MSI-X */
2198 for (i = 0; i < max(1, ar_pci->num_msi_intrs); i++)
2199 free_irq(ar_pci->pdev->irq + i, ar);
2202 static void ath10k_pci_init_irq_tasklets(struct ath10k *ar)
2204 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2207 tasklet_init(&ar_pci->intr_tq, ath10k_pci_tasklet, (unsigned long)ar);
2208 tasklet_init(&ar_pci->msi_fw_err, ath10k_msi_err_tasklet,
2211 for (i = 0; i < CE_COUNT; i++) {
2212 ar_pci->pipe_info[i].ar_pci = ar_pci;
2213 tasklet_init(&ar_pci->pipe_info[i].intr, ath10k_pci_ce_tasklet,
2214 (unsigned long)&ar_pci->pipe_info[i]);
2218 static int ath10k_pci_init_irq(struct ath10k *ar)
2220 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2223 ath10k_pci_init_irq_tasklets(ar);
2225 if (ath10k_pci_irq_mode != ATH10K_PCI_IRQ_AUTO)
2226 ath10k_info(ar, "limiting irq mode to: %d\n",
2227 ath10k_pci_irq_mode);
2230 if (ath10k_pci_irq_mode == ATH10K_PCI_IRQ_AUTO) {
2231 ar_pci->num_msi_intrs = MSI_NUM_REQUEST;
2232 ret = pci_enable_msi_range(ar_pci->pdev, ar_pci->num_msi_intrs,
2233 ar_pci->num_msi_intrs);
2241 if (ath10k_pci_irq_mode != ATH10K_PCI_IRQ_LEGACY) {
2242 ar_pci->num_msi_intrs = 1;
2243 ret = pci_enable_msi(ar_pci->pdev);
2252 * A potential race occurs here: The CORE_BASE write
2253 * depends on target correctly decoding AXI address but
2254 * host won't know when target writes BAR to CORE_CTRL.
2255 * This write might get lost if target has NOT written BAR.
2256 * For now, fix the race by repeating the write in below
2257 * synchronization checking. */
2258 ar_pci->num_msi_intrs = 0;
2260 ath10k_pci_write32(ar, SOC_CORE_BASE_ADDRESS + PCIE_INTR_ENABLE_ADDRESS,
2261 PCIE_INTR_FIRMWARE_MASK | PCIE_INTR_CE_MASK_ALL);
2266 static void ath10k_pci_deinit_irq_legacy(struct ath10k *ar)
2268 ath10k_pci_write32(ar, SOC_CORE_BASE_ADDRESS + PCIE_INTR_ENABLE_ADDRESS,
2272 static int ath10k_pci_deinit_irq(struct ath10k *ar)
2274 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2276 switch (ar_pci->num_msi_intrs) {
2278 ath10k_pci_deinit_irq_legacy(ar);
2282 case MSI_NUM_REQUEST:
2283 pci_disable_msi(ar_pci->pdev);
2286 pci_disable_msi(ar_pci->pdev);
2289 ath10k_warn(ar, "unknown irq configuration upon deinit\n");
2293 static int ath10k_pci_wait_for_target_init(struct ath10k *ar)
2295 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2296 unsigned long timeout;
2299 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot waiting target to initialise\n");
2301 timeout = jiffies + msecs_to_jiffies(ATH10K_PCI_TARGET_WAIT);
2304 val = ath10k_pci_read32(ar, FW_INDICATOR_ADDRESS);
2306 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot target indicator %x\n",
2309 /* target should never return this */
2310 if (val == 0xffffffff)
2313 /* the device has crashed so don't bother trying anymore */
2314 if (val & FW_IND_EVENT_PENDING)
2317 if (val & FW_IND_INITIALIZED)
2320 if (ar_pci->num_msi_intrs == 0)
2321 /* Fix potential race by repeating CORE_BASE writes */
2322 ath10k_pci_enable_legacy_irq(ar);
2325 } while (time_before(jiffies, timeout));
2327 ath10k_pci_disable_and_clear_legacy_irq(ar);
2328 ath10k_pci_irq_msi_fw_mask(ar);
2330 if (val == 0xffffffff) {
2331 ath10k_err(ar, "failed to read device register, device is gone\n");
2335 if (val & FW_IND_EVENT_PENDING) {
2336 ath10k_warn(ar, "device has crashed during init\n");
2337 ath10k_pci_fw_crashed_clear(ar);
2338 ath10k_pci_fw_crashed_dump(ar);
2342 if (!(val & FW_IND_INITIALIZED)) {
2343 ath10k_err(ar, "failed to receive initialized event from target: %08x\n",
2348 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot target initialised\n");
2352 static int ath10k_pci_cold_reset(struct ath10k *ar)
2357 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot cold reset\n");
2359 spin_lock_bh(&ar->data_lock);
2361 ar->stats.fw_cold_reset_counter++;
2363 spin_unlock_bh(&ar->data_lock);
2365 /* Put Target, including PCIe, into RESET. */
2366 val = ath10k_pci_reg_read32(ar, SOC_GLOBAL_RESET_ADDRESS);
2368 ath10k_pci_reg_write32(ar, SOC_GLOBAL_RESET_ADDRESS, val);
2370 for (i = 0; i < ATH_PCI_RESET_WAIT_MAX; i++) {
2371 if (ath10k_pci_reg_read32(ar, RTC_STATE_ADDRESS) &
2372 RTC_STATE_COLD_RESET_MASK)
2377 /* Pull Target, including PCIe, out of RESET. */
2379 ath10k_pci_reg_write32(ar, SOC_GLOBAL_RESET_ADDRESS, val);
2381 for (i = 0; i < ATH_PCI_RESET_WAIT_MAX; i++) {
2382 if (!(ath10k_pci_reg_read32(ar, RTC_STATE_ADDRESS) &
2383 RTC_STATE_COLD_RESET_MASK))
2388 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot cold reset complete\n");
2393 static int ath10k_pci_claim(struct ath10k *ar)
2395 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2396 struct pci_dev *pdev = ar_pci->pdev;
2400 pci_set_drvdata(pdev, ar);
2402 ret = pci_enable_device(pdev);
2404 ath10k_err(ar, "failed to enable pci device: %d\n", ret);
2408 ret = pci_request_region(pdev, BAR_NUM, "ath");
2410 ath10k_err(ar, "failed to request region BAR%d: %d\n", BAR_NUM,
2415 /* Target expects 32 bit DMA. Enforce it. */
2416 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2418 ath10k_err(ar, "failed to set dma mask to 32-bit: %d\n", ret);
2422 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2424 ath10k_err(ar, "failed to set consistent dma mask to 32-bit: %d\n",
2429 pci_set_master(pdev);
2431 /* Workaround: Disable ASPM */
2432 pci_read_config_dword(pdev, 0x80, &lcr_val);
2433 pci_write_config_dword(pdev, 0x80, (lcr_val & 0xffffff00));
2435 /* Arrange for access to Target SoC registers. */
2436 ar_pci->mem = pci_iomap(pdev, BAR_NUM, 0);
2438 ath10k_err(ar, "failed to iomap BAR%d\n", BAR_NUM);
2443 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot pci_mem 0x%p\n", ar_pci->mem);
2447 pci_clear_master(pdev);
2450 pci_release_region(pdev, BAR_NUM);
2453 pci_disable_device(pdev);
2458 static void ath10k_pci_release(struct ath10k *ar)
2460 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
2461 struct pci_dev *pdev = ar_pci->pdev;
2463 pci_iounmap(pdev, ar_pci->mem);
2464 pci_release_region(pdev, BAR_NUM);
2465 pci_clear_master(pdev);
2466 pci_disable_device(pdev);
2469 static int ath10k_pci_probe(struct pci_dev *pdev,
2470 const struct pci_device_id *pci_dev)
2474 struct ath10k_pci *ar_pci;
2477 ar = ath10k_core_create(sizeof(*ar_pci), &pdev->dev,
2479 &ath10k_pci_hif_ops);
2481 dev_err(&pdev->dev, "failed to allocate core\n");
2485 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci probe\n");
2487 ar_pci = ath10k_pci_priv(ar);
2488 ar_pci->pdev = pdev;
2489 ar_pci->dev = &pdev->dev;
2492 spin_lock_init(&ar_pci->ce_lock);
2493 setup_timer(&ar_pci->rx_post_retry, ath10k_pci_rx_replenish_retry,
2496 ret = ath10k_pci_claim(ar);
2498 ath10k_err(ar, "failed to claim device: %d\n", ret);
2499 goto err_core_destroy;
2502 ret = ath10k_pci_wake(ar);
2504 ath10k_err(ar, "failed to wake up: %d\n", ret);
2508 chip_id = ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
2509 if (chip_id == 0xffffffff) {
2510 ath10k_err(ar, "failed to get chip id\n");
2514 ret = ath10k_pci_alloc_pipes(ar);
2516 ath10k_err(ar, "failed to allocate copy engine pipes: %d\n",
2521 ath10k_pci_ce_deinit(ar);
2522 ath10k_pci_irq_disable(ar);
2524 ret = ath10k_pci_init_irq(ar);
2526 ath10k_err(ar, "failed to init irqs: %d\n", ret);
2527 goto err_free_pipes;
2530 ath10k_info(ar, "pci irq %s interrupts %d irq_mode %d reset_mode %d\n",
2531 ath10k_pci_get_irq_method(ar), ar_pci->num_msi_intrs,
2532 ath10k_pci_irq_mode, ath10k_pci_reset_mode);
2534 ret = ath10k_pci_request_irq(ar);
2536 ath10k_warn(ar, "failed to request irqs: %d\n", ret);
2537 goto err_deinit_irq;
2540 ath10k_pci_sleep(ar);
2542 ret = ath10k_core_register(ar, chip_id);
2544 ath10k_err(ar, "failed to register driver core: %d\n", ret);
2551 ath10k_pci_free_irq(ar);
2552 ath10k_pci_kill_tasklet(ar);
2555 ath10k_pci_deinit_irq(ar);
2558 ath10k_pci_free_pipes(ar);
2561 ath10k_pci_sleep(ar);
2564 ath10k_pci_release(ar);
2567 ath10k_core_destroy(ar);
2572 static void ath10k_pci_remove(struct pci_dev *pdev)
2574 struct ath10k *ar = pci_get_drvdata(pdev);
2575 struct ath10k_pci *ar_pci;
2577 ath10k_dbg(ar, ATH10K_DBG_PCI, "pci remove\n");
2582 ar_pci = ath10k_pci_priv(ar);
2587 ath10k_core_unregister(ar);
2588 ath10k_pci_free_irq(ar);
2589 ath10k_pci_kill_tasklet(ar);
2590 ath10k_pci_deinit_irq(ar);
2591 ath10k_pci_ce_deinit(ar);
2592 ath10k_pci_free_pipes(ar);
2593 ath10k_pci_release(ar);
2594 ath10k_core_destroy(ar);
2597 MODULE_DEVICE_TABLE(pci, ath10k_pci_id_table);
2599 static struct pci_driver ath10k_pci_driver = {
2600 .name = "ath10k_pci",
2601 .id_table = ath10k_pci_id_table,
2602 .probe = ath10k_pci_probe,
2603 .remove = ath10k_pci_remove,
2606 static int __init ath10k_pci_init(void)
2610 ret = pci_register_driver(&ath10k_pci_driver);
2612 printk(KERN_ERR "failed to register ath10k pci driver: %d\n",
2617 module_init(ath10k_pci_init);
2619 static void __exit ath10k_pci_exit(void)
2621 pci_unregister_driver(&ath10k_pci_driver);
2624 module_exit(ath10k_pci_exit);
2626 MODULE_AUTHOR("Qualcomm Atheros");
2627 MODULE_DESCRIPTION("Driver support for Atheros QCA988X PCIe devices");
2628 MODULE_LICENSE("Dual BSD/GPL");
2629 MODULE_FIRMWARE(QCA988X_HW_2_0_FW_DIR "/" QCA988X_HW_2_0_FW_FILE);
2630 MODULE_FIRMWARE(QCA988X_HW_2_0_FW_DIR "/" ATH10K_FW_API2_FILE);
2631 MODULE_FIRMWARE(QCA988X_HW_2_0_FW_DIR "/" ATH10K_FW_API3_FILE);
2632 MODULE_FIRMWARE(QCA988X_HW_2_0_FW_DIR "/" QCA988X_HW_2_0_BOARD_DATA_FILE);