1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2 /*
3 * Copyright (C) 2003-2015, 2018-2022 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7 #ifndef __iwl_trans_int_pcie_h__
8 #define __iwl_trans_int_pcie_h__
9
10 #include <linux/spinlock.h>
11 #include <linux/interrupt.h>
12 #include <linux/skbuff.h>
13 #include <linux/wait.h>
14 #include <linux/pci.h>
15 #include <linux/timer.h>
16 #include <linux/cpu.h>
17
18 #include "iwl-fh.h"
19 #include "iwl-csr.h"
20 #include "iwl-trans.h"
21 #include "iwl-debug.h"
22 #include "iwl-io.h"
23 #include "iwl-op-mode.h"
24 #include "iwl-drv.h"
25 #include "queue/tx.h"
26 #include "iwl-context-info.h"
27
28 /*
29 * RX related structures and functions
30 */
31 #define RX_NUM_QUEUES 1
32 #define RX_POST_REQ_ALLOC 2
33 #define RX_CLAIM_REQ_ALLOC 8
34 #define RX_PENDING_WATERMARK 16
35 #define FIRST_RX_QUEUE 512
36
37 struct iwl_host_cmd;
38
39 /*This file includes the declaration that are internal to the
40 * trans_pcie layer */
41
42 /**
43 * struct iwl_rx_mem_buffer
44 * @page_dma: bus address of rxb page
45 * @page: driver's pointer to the rxb page
46 * @list: list entry for the membuffer
47 * @invalid: rxb is in driver ownership - not owned by HW
48 * @vid: index of this rxb in the global table
49 * @offset: indicates which offset of the page (in bytes)
50 * this buffer uses (if multiple RBs fit into one page)
51 */
52 struct iwl_rx_mem_buffer {
53 dma_addr_t page_dma;
54 struct page *page;
55 struct list_head list;
56 u32 offset;
57 u16 vid;
58 bool invalid;
59 };
60
61 /**
62 * struct isr_statistics - interrupt statistics
63 *
64 */
65 struct isr_statistics {
66 u32 hw;
67 u32 sw;
68 u32 err_code;
69 u32 sch;
70 u32 alive;
71 u32 rfkill;
72 u32 ctkill;
73 u32 wakeup;
74 u32 rx;
75 u32 tx;
76 u32 unhandled;
77 };
78
79 /**
80 * struct iwl_rx_transfer_desc - transfer descriptor
81 * @addr: ptr to free buffer start address
82 * @rbid: unique tag of the buffer
83 * @reserved: reserved
84 */
85 struct iwl_rx_transfer_desc {
86 __le16 rbid;
87 __le16 reserved[3];
88 __le64 addr;
89 } __packed;
90
91 #define IWL_RX_CD_FLAGS_FRAGMENTED BIT(0)
92
93 /**
94 * struct iwl_rx_completion_desc - completion descriptor
95 * @reserved1: reserved
96 * @rbid: unique tag of the received buffer
97 * @flags: flags (0: fragmented, all others: reserved)
98 * @reserved2: reserved
99 */
100 struct iwl_rx_completion_desc {
101 __le32 reserved1;
102 __le16 rbid;
103 u8 flags;
104 u8 reserved2[25];
105 } __packed;
106
107 /**
108 * struct iwl_rx_completion_desc_bz - Bz completion descriptor
109 * @rbid: unique tag of the received buffer
110 * @flags: flags (0: fragmented, all others: reserved)
111 * @reserved: reserved
112 */
113 struct iwl_rx_completion_desc_bz {
114 __le16 rbid;
115 u8 flags;
116 u8 reserved[1];
117 } __packed;
118
119 /**
120 * struct iwl_rxq - Rx queue
121 * @id: queue index
122 * @bd: driver's pointer to buffer of receive buffer descriptors (rbd).
123 * Address size is 32 bit in pre-9000 devices and 64 bit in 9000 devices.
124 * In AX210 devices it is a pointer to a list of iwl_rx_transfer_desc's
125 * @bd_dma: bus address of buffer of receive buffer descriptors (rbd)
126 * @used_bd: driver's pointer to buffer of used receive buffer descriptors (rbd)
127 * @used_bd_dma: physical address of buffer of used receive buffer descriptors (rbd)
128 * @read: Shared index to newest available Rx buffer
129 * @write: Shared index to oldest written Rx packet
130 * @free_count: Number of pre-allocated buffers in rx_free
131 * @used_count: Number of RBDs handled to allocator to use for allocation
132 * @write_actual:
133 * @rx_free: list of RBDs with allocated RB ready for use
134 * @rx_used: list of RBDs with no RB attached
135 * @need_update: flag to indicate we need to update read/write index
136 * @rb_stts: driver's pointer to receive buffer status
137 * @rb_stts_dma: bus address of receive buffer status
138 * @lock:
139 * @queue: actual rx queue. Not used for multi-rx queue.
140 * @next_rb_is_fragment: indicates that the previous RB that we handled set
141 * the fragmented flag, so the next one is still another fragment
142 *
143 * NOTE: rx_free and rx_used are used as a FIFO for iwl_rx_mem_buffers
144 */
145 struct iwl_rxq {
146 int id;
147 void *bd;
148 dma_addr_t bd_dma;
149 void *used_bd;
150 dma_addr_t used_bd_dma;
151 u32 read;
152 u32 write;
153 u32 free_count;
154 u32 used_count;
155 u32 write_actual;
156 u32 queue_size;
157 struct list_head rx_free;
158 struct list_head rx_used;
159 bool need_update, next_rb_is_fragment;
160 void *rb_stts;
161 dma_addr_t rb_stts_dma;
162 spinlock_t lock;
163 struct napi_struct napi;
164 struct iwl_rx_mem_buffer *queue[RX_QUEUE_SIZE];
165 };
166
167 /**
168 * struct iwl_rb_allocator - Rx allocator
169 * @req_pending: number of requests the allcator had not processed yet
170 * @req_ready: number of requests honored and ready for claiming
171 * @rbd_allocated: RBDs with pages allocated and ready to be handled to
172 * the queue. This is a list of &struct iwl_rx_mem_buffer
173 * @rbd_empty: RBDs with no page attached for allocator use. This is a list
174 * of &struct iwl_rx_mem_buffer
175 * @lock: protects the rbd_allocated and rbd_empty lists
176 * @alloc_wq: work queue for background calls
177 * @rx_alloc: work struct for background calls
178 */
179 struct iwl_rb_allocator {
180 atomic_t req_pending;
181 atomic_t req_ready;
182 struct list_head rbd_allocated;
183 struct list_head rbd_empty;
184 spinlock_t lock;
185 struct workqueue_struct *alloc_wq;
186 struct work_struct rx_alloc;
187 };
188
189 /**
190 * iwl_get_closed_rb_stts - get closed rb stts from different structs
191 * @rxq - the rxq to get the rb stts from
192 */
iwl_get_closed_rb_stts(struct iwl_trans * trans,struct iwl_rxq * rxq)193 static inline __le16 iwl_get_closed_rb_stts(struct iwl_trans *trans,
194 struct iwl_rxq *rxq)
195 {
196 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
197 __le16 *rb_stts = rxq->rb_stts;
198
199 return READ_ONCE(*rb_stts);
200 } else {
201 struct iwl_rb_status *rb_stts = rxq->rb_stts;
202
203 return READ_ONCE(rb_stts->closed_rb_num);
204 }
205 }
206
207 #ifdef CONFIG_IWLWIFI_DEBUGFS
208 /**
209 * enum iwl_fw_mon_dbgfs_state - the different states of the monitor_data
210 * debugfs file
211 *
212 * @IWL_FW_MON_DBGFS_STATE_CLOSED: the file is closed.
213 * @IWL_FW_MON_DBGFS_STATE_OPEN: the file is open.
214 * @IWL_FW_MON_DBGFS_STATE_DISABLED: the file is disabled, once this state is
215 * set the file can no longer be used.
216 */
217 enum iwl_fw_mon_dbgfs_state {
218 IWL_FW_MON_DBGFS_STATE_CLOSED,
219 IWL_FW_MON_DBGFS_STATE_OPEN,
220 IWL_FW_MON_DBGFS_STATE_DISABLED,
221 };
222 #endif
223
224 /**
225 * enum iwl_shared_irq_flags - level of sharing for irq
226 * @IWL_SHARED_IRQ_NON_RX: interrupt vector serves non rx causes.
227 * @IWL_SHARED_IRQ_FIRST_RSS: interrupt vector serves first RSS queue.
228 */
229 enum iwl_shared_irq_flags {
230 IWL_SHARED_IRQ_NON_RX = BIT(0),
231 IWL_SHARED_IRQ_FIRST_RSS = BIT(1),
232 };
233
234 /**
235 * enum iwl_image_response_code - image response values
236 * @IWL_IMAGE_RESP_DEF: the default value of the register
237 * @IWL_IMAGE_RESP_SUCCESS: iml was read successfully
238 * @IWL_IMAGE_RESP_FAIL: iml reading failed
239 */
240 enum iwl_image_response_code {
241 IWL_IMAGE_RESP_DEF = 0,
242 IWL_IMAGE_RESP_SUCCESS = 1,
243 IWL_IMAGE_RESP_FAIL = 2,
244 };
245
246 /**
247 * struct cont_rec: continuous recording data structure
248 * @prev_wr_ptr: the last address that was read in monitor_data
249 * debugfs file
250 * @prev_wrap_cnt: the wrap count that was used during the last read in
251 * monitor_data debugfs file
252 * @state: the state of monitor_data debugfs file as described
253 * in &iwl_fw_mon_dbgfs_state enum
254 * @mutex: locked while reading from monitor_data debugfs file
255 */
256 #ifdef CONFIG_IWLWIFI_DEBUGFS
257 struct cont_rec {
258 u32 prev_wr_ptr;
259 u32 prev_wrap_cnt;
260 u8 state;
261 /* Used to sync monitor_data debugfs file with driver unload flow */
262 struct mutex mutex;
263 };
264 #endif
265
266 enum iwl_pcie_fw_reset_state {
267 FW_RESET_IDLE,
268 FW_RESET_REQUESTED,
269 FW_RESET_OK,
270 FW_RESET_ERROR,
271 };
272
273 /**
274 * enum wl_pcie_imr_status - imr dma transfer state
275 * @IMR_D2S_IDLE: default value of the dma transfer
276 * @IMR_D2S_REQUESTED: dma transfer requested
277 * @IMR_D2S_COMPLETED: dma transfer completed
278 * @IMR_D2S_ERROR: dma transfer error
279 */
280 enum iwl_pcie_imr_status {
281 IMR_D2S_IDLE,
282 IMR_D2S_REQUESTED,
283 IMR_D2S_COMPLETED,
284 IMR_D2S_ERROR,
285 };
286
287 /**
288 * struct iwl_trans_pcie - PCIe transport specific data
289 * @rxq: all the RX queue data
290 * @rx_pool: initial pool of iwl_rx_mem_buffer for all the queues
291 * @global_table: table mapping received VID from hw to rxb
292 * @rba: allocator for RX replenishing
293 * @ctxt_info: context information for FW self init
294 * @ctxt_info_gen3: context information for gen3 devices
295 * @prph_info: prph info for self init
296 * @prph_scratch: prph scratch for self init
297 * @ctxt_info_dma_addr: dma addr of context information
298 * @prph_info_dma_addr: dma addr of prph info
299 * @prph_scratch_dma_addr: dma addr of prph scratch
300 * @ctxt_info_dma_addr: dma addr of context information
301 * @init_dram: DRAM data of firmware image (including paging).
302 * Context information addresses will be taken from here.
303 * This is driver's local copy for keeping track of size and
304 * count for allocating and freeing the memory.
305 * @iml: image loader image virtual address
306 * @iml_dma_addr: image loader image DMA address
307 * @trans: pointer to the generic transport area
308 * @scd_base_addr: scheduler sram base address in SRAM
309 * @kw: keep warm address
310 * @pnvm_data: holds info about pnvm payloads allocated in DRAM
311 * @reduced_tables_data: holds info about power reduced tablse
312 * payloads allocated in DRAM
313 * @pci_dev: basic pci-network driver stuff
314 * @hw_base: pci hardware address support
315 * @ucode_write_complete: indicates that the ucode has been copied.
316 * @ucode_write_waitq: wait queue for uCode load
317 * @cmd_queue - command queue number
318 * @def_rx_queue - default rx queue number
319 * @rx_buf_size: Rx buffer size
320 * @scd_set_active: should the transport configure the SCD for HCMD queue
321 * @rx_page_order: page order for receive buffer size
322 * @rx_buf_bytes: RX buffer (RB) size in bytes
323 * @reg_lock: protect hw register access
324 * @mutex: to protect stop_device / start_fw / start_hw
325 * @cmd_in_flight: true when we have a host command in flight
326 #ifdef CONFIG_IWLWIFI_DEBUGFS
327 * @fw_mon_data: fw continuous recording data
328 #endif
329 * @msix_entries: array of MSI-X entries
330 * @msix_enabled: true if managed to enable MSI-X
331 * @shared_vec_mask: the type of causes the shared vector handles
332 * (see iwl_shared_irq_flags).
333 * @alloc_vecs: the number of interrupt vectors allocated by the OS
334 * @def_irq: default irq for non rx causes
335 * @fh_init_mask: initial unmasked fh causes
336 * @hw_init_mask: initial unmasked hw causes
337 * @fh_mask: current unmasked fh causes
338 * @hw_mask: current unmasked hw causes
339 * @in_rescan: true if we have triggered a device rescan
340 * @base_rb_stts: base virtual address of receive buffer status for all queues
341 * @base_rb_stts_dma: base physical address of receive buffer status
342 * @supported_dma_mask: DMA mask to validate the actual address against,
343 * will be DMA_BIT_MASK(11) or DMA_BIT_MASK(12) depending on the device
344 * @alloc_page_lock: spinlock for the page allocator
345 * @alloc_page: allocated page to still use parts of
346 * @alloc_page_used: how much of the allocated page was already used (bytes)
347 * @imr_status: imr dma state machine
348 * @wait_queue_head_t: imr wait queue for dma completion
349 * @rf_name: name/version of the CRF, if any
350 */
351 struct iwl_trans_pcie {
352 struct iwl_rxq *rxq;
353 struct iwl_rx_mem_buffer *rx_pool;
354 struct iwl_rx_mem_buffer **global_table;
355 struct iwl_rb_allocator rba;
356 union {
357 struct iwl_context_info *ctxt_info;
358 struct iwl_context_info_gen3 *ctxt_info_gen3;
359 };
360 struct iwl_prph_info *prph_info;
361 struct iwl_prph_scratch *prph_scratch;
362 void *iml;
363 dma_addr_t ctxt_info_dma_addr;
364 dma_addr_t prph_info_dma_addr;
365 dma_addr_t prph_scratch_dma_addr;
366 dma_addr_t iml_dma_addr;
367 struct iwl_trans *trans;
368
369 struct net_device napi_dev;
370
371 /* INT ICT Table */
372 __le32 *ict_tbl;
373 dma_addr_t ict_tbl_dma;
374 int ict_index;
375 bool use_ict;
376 bool is_down, opmode_down;
377 s8 debug_rfkill;
378 struct isr_statistics isr_stats;
379
380 spinlock_t irq_lock;
381 struct mutex mutex;
382 u32 inta_mask;
383 u32 scd_base_addr;
384 struct iwl_dma_ptr kw;
385
386 /* pnvm data */
387 struct iwl_dram_regions pnvm_data;
388 struct iwl_dram_regions reduced_tables_data;
389
390 struct iwl_txq *txq_memory;
391
392 /* PCI bus related data */
393 struct pci_dev *pci_dev;
394 u8 __iomem *hw_base;
395
396 bool ucode_write_complete;
397 bool sx_complete;
398 wait_queue_head_t ucode_write_waitq;
399 wait_queue_head_t sx_waitq;
400
401 u8 def_rx_queue;
402 u8 n_no_reclaim_cmds;
403 u8 no_reclaim_cmds[MAX_NO_RECLAIM_CMDS];
404 u16 num_rx_bufs;
405
406 enum iwl_amsdu_size rx_buf_size;
407 bool scd_set_active;
408 bool pcie_dbg_dumped_once;
409 u32 rx_page_order;
410 u32 rx_buf_bytes;
411 u32 supported_dma_mask;
412
413 /* allocator lock for the two values below */
414 spinlock_t alloc_page_lock;
415 struct page *alloc_page;
416 u32 alloc_page_used;
417
418 /*protect hw register */
419 spinlock_t reg_lock;
420 bool cmd_hold_nic_awake;
421
422 #ifdef CONFIG_IWLWIFI_DEBUGFS
423 struct cont_rec fw_mon_data;
424 #endif
425
426 struct msix_entry msix_entries[IWL_MAX_RX_HW_QUEUES];
427 bool msix_enabled;
428 u8 shared_vec_mask;
429 u32 alloc_vecs;
430 u32 def_irq;
431 u32 fh_init_mask;
432 u32 hw_init_mask;
433 u32 fh_mask;
434 u32 hw_mask;
435 cpumask_t affinity_mask[IWL_MAX_RX_HW_QUEUES];
436 u16 tx_cmd_queue_size;
437 bool in_rescan;
438
439 void *base_rb_stts;
440 dma_addr_t base_rb_stts_dma;
441
442 bool fw_reset_handshake;
443 enum iwl_pcie_fw_reset_state fw_reset_state;
444 wait_queue_head_t fw_reset_waitq;
445 enum iwl_pcie_imr_status imr_status;
446 wait_queue_head_t imr_waitq;
447 char rf_name[32];
448 };
449
450 static inline struct iwl_trans_pcie *
IWL_TRANS_GET_PCIE_TRANS(struct iwl_trans * trans)451 IWL_TRANS_GET_PCIE_TRANS(struct iwl_trans *trans)
452 {
453 return (void *)trans->trans_specific;
454 }
455
iwl_pcie_clear_irq(struct iwl_trans * trans,int queue)456 static inline void iwl_pcie_clear_irq(struct iwl_trans *trans, int queue)
457 {
458 /*
459 * Before sending the interrupt the HW disables it to prevent
460 * a nested interrupt. This is done by writing 1 to the corresponding
461 * bit in the mask register. After handling the interrupt, it should be
462 * re-enabled by clearing this bit. This register is defined as
463 * write 1 clear (W1C) register, meaning that it's being clear
464 * by writing 1 to the bit.
465 */
466 iwl_write32(trans, CSR_MSIX_AUTOMASK_ST_AD, BIT(queue));
467 }
468
469 static inline struct iwl_trans *
iwl_trans_pcie_get_trans(struct iwl_trans_pcie * trans_pcie)470 iwl_trans_pcie_get_trans(struct iwl_trans_pcie *trans_pcie)
471 {
472 return container_of((void *)trans_pcie, struct iwl_trans,
473 trans_specific);
474 }
475
476 /*
477 * Convention: trans API functions: iwl_trans_pcie_XXX
478 * Other functions: iwl_pcie_XXX
479 */
480 struct iwl_trans
481 *iwl_trans_pcie_alloc(struct pci_dev *pdev,
482 const struct pci_device_id *ent,
483 const struct iwl_cfg_trans_params *cfg_trans);
484 void iwl_trans_pcie_free(struct iwl_trans *trans);
485 void iwl_trans_pcie_free_pnvm_dram_regions(struct iwl_dram_regions *dram_regions,
486 struct device *dev);
487
488 bool __iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans);
489 #define _iwl_trans_pcie_grab_nic_access(trans) \
490 __cond_lock(nic_access_nobh, \
491 likely(__iwl_trans_pcie_grab_nic_access(trans)))
492
493 /*****************************************************
494 * RX
495 ******************************************************/
496 int iwl_pcie_rx_init(struct iwl_trans *trans);
497 int iwl_pcie_gen2_rx_init(struct iwl_trans *trans);
498 irqreturn_t iwl_pcie_msix_isr(int irq, void *data);
499 irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id);
500 irqreturn_t iwl_pcie_irq_msix_handler(int irq, void *dev_id);
501 irqreturn_t iwl_pcie_irq_rx_msix_handler(int irq, void *dev_id);
502 int iwl_pcie_rx_stop(struct iwl_trans *trans);
503 void iwl_pcie_rx_free(struct iwl_trans *trans);
504 void iwl_pcie_free_rbs_pool(struct iwl_trans *trans);
505 void iwl_pcie_rx_init_rxb_lists(struct iwl_rxq *rxq);
506 void iwl_pcie_rx_napi_sync(struct iwl_trans *trans);
507 void iwl_pcie_rxq_alloc_rbs(struct iwl_trans *trans, gfp_t priority,
508 struct iwl_rxq *rxq);
509
510 /*****************************************************
511 * ICT - interrupt handling
512 ******************************************************/
513 irqreturn_t iwl_pcie_isr(int irq, void *data);
514 int iwl_pcie_alloc_ict(struct iwl_trans *trans);
515 void iwl_pcie_free_ict(struct iwl_trans *trans);
516 void iwl_pcie_reset_ict(struct iwl_trans *trans);
517 void iwl_pcie_disable_ict(struct iwl_trans *trans);
518
519 /*****************************************************
520 * TX / HCMD
521 ******************************************************/
522 int iwl_pcie_tx_init(struct iwl_trans *trans);
523 void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr);
524 int iwl_pcie_tx_stop(struct iwl_trans *trans);
525 void iwl_pcie_tx_free(struct iwl_trans *trans);
526 bool iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int queue, u16 ssn,
527 const struct iwl_trans_txq_scd_cfg *cfg,
528 unsigned int wdg_timeout);
529 void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue,
530 bool configure_scd);
531 void iwl_trans_pcie_txq_set_shared_mode(struct iwl_trans *trans, u32 txq_id,
532 bool shared_mode);
533 int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
534 struct iwl_device_tx_cmd *dev_cmd, int txq_id);
535 void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans);
536 #if defined(__linux__)
537 int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
538 #endif
539 void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
540 struct iwl_rx_cmd_buffer *rxb);
541 void iwl_trans_pcie_tx_reset(struct iwl_trans *trans);
542
543 /*****************************************************
544 * Error handling
545 ******************************************************/
546 void iwl_pcie_dump_csr(struct iwl_trans *trans);
547
548 /*****************************************************
549 * Helpers
550 ******************************************************/
_iwl_disable_interrupts(struct iwl_trans * trans)551 static inline void _iwl_disable_interrupts(struct iwl_trans *trans)
552 {
553 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
554
555 clear_bit(STATUS_INT_ENABLED, &trans->status);
556 if (!trans_pcie->msix_enabled) {
557 /* disable interrupts from uCode/NIC to host */
558 iwl_write32(trans, CSR_INT_MASK, 0x00000000);
559
560 /* acknowledge/clear/reset any interrupts still pending
561 * from uCode or flow handler (Rx/Tx DMA) */
562 iwl_write32(trans, CSR_INT, 0xffffffff);
563 iwl_write32(trans, CSR_FH_INT_STATUS, 0xffffffff);
564 } else {
565 /* disable all the interrupt we might use */
566 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD,
567 trans_pcie->fh_init_mask);
568 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD,
569 trans_pcie->hw_init_mask);
570 }
571 IWL_DEBUG_ISR(trans, "Disabled interrupts\n");
572 }
573
iwl_pcie_get_num_sections(const struct fw_img * fw,int start)574 static inline int iwl_pcie_get_num_sections(const struct fw_img *fw,
575 int start)
576 {
577 int i = 0;
578
579 while (start < fw->num_sec &&
580 fw->sec[start].offset != CPU1_CPU2_SEPARATOR_SECTION &&
581 fw->sec[start].offset != PAGING_SEPARATOR_SECTION) {
582 start++;
583 i++;
584 }
585
586 return i;
587 }
588
iwl_pcie_ctxt_info_free_fw_img(struct iwl_trans * trans)589 static inline void iwl_pcie_ctxt_info_free_fw_img(struct iwl_trans *trans)
590 {
591 struct iwl_self_init_dram *dram = &trans->init_dram;
592 int i;
593
594 if (!dram->fw) {
595 WARN_ON(dram->fw_cnt);
596 return;
597 }
598
599 for (i = 0; i < dram->fw_cnt; i++)
600 dma_free_coherent(trans->dev, dram->fw[i].size,
601 dram->fw[i].block, dram->fw[i].physical);
602
603 kfree(dram->fw);
604 dram->fw_cnt = 0;
605 dram->fw = NULL;
606 }
607
iwl_disable_interrupts(struct iwl_trans * trans)608 static inline void iwl_disable_interrupts(struct iwl_trans *trans)
609 {
610 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
611
612 spin_lock_bh(&trans_pcie->irq_lock);
613 _iwl_disable_interrupts(trans);
614 spin_unlock_bh(&trans_pcie->irq_lock);
615 }
616
_iwl_enable_interrupts(struct iwl_trans * trans)617 static inline void _iwl_enable_interrupts(struct iwl_trans *trans)
618 {
619 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
620
621 IWL_DEBUG_ISR(trans, "Enabling interrupts\n");
622 set_bit(STATUS_INT_ENABLED, &trans->status);
623 if (!trans_pcie->msix_enabled) {
624 trans_pcie->inta_mask = CSR_INI_SET_MASK;
625 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask);
626 } else {
627 /*
628 * fh/hw_mask keeps all the unmasked causes.
629 * Unlike msi, in msix cause is enabled when it is unset.
630 */
631 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
632 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
633 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD,
634 ~trans_pcie->fh_mask);
635 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD,
636 ~trans_pcie->hw_mask);
637 }
638 }
639
iwl_enable_interrupts(struct iwl_trans * trans)640 static inline void iwl_enable_interrupts(struct iwl_trans *trans)
641 {
642 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
643
644 spin_lock_bh(&trans_pcie->irq_lock);
645 _iwl_enable_interrupts(trans);
646 spin_unlock_bh(&trans_pcie->irq_lock);
647 }
iwl_enable_hw_int_msk_msix(struct iwl_trans * trans,u32 msk)648 static inline void iwl_enable_hw_int_msk_msix(struct iwl_trans *trans, u32 msk)
649 {
650 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
651
652 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD, ~msk);
653 trans_pcie->hw_mask = msk;
654 }
655
iwl_enable_fh_int_msk_msix(struct iwl_trans * trans,u32 msk)656 static inline void iwl_enable_fh_int_msk_msix(struct iwl_trans *trans, u32 msk)
657 {
658 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
659
660 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~msk);
661 trans_pcie->fh_mask = msk;
662 }
663
iwl_enable_fw_load_int(struct iwl_trans * trans)664 static inline void iwl_enable_fw_load_int(struct iwl_trans *trans)
665 {
666 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
667
668 IWL_DEBUG_ISR(trans, "Enabling FW load interrupt\n");
669 if (!trans_pcie->msix_enabled) {
670 trans_pcie->inta_mask = CSR_INT_BIT_FH_TX;
671 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask);
672 } else {
673 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD,
674 trans_pcie->hw_init_mask);
675 iwl_enable_fh_int_msk_msix(trans,
676 MSIX_FH_INT_CAUSES_D2S_CH0_NUM);
677 }
678 }
679
iwl_enable_fw_load_int_ctx_info(struct iwl_trans * trans)680 static inline void iwl_enable_fw_load_int_ctx_info(struct iwl_trans *trans)
681 {
682 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
683
684 IWL_DEBUG_ISR(trans, "Enabling ALIVE interrupt only\n");
685
686 if (!trans_pcie->msix_enabled) {
687 /*
688 * When we'll receive the ALIVE interrupt, the ISR will call
689 * iwl_enable_fw_load_int_ctx_info again to set the ALIVE
690 * interrupt (which is not really needed anymore) but also the
691 * RX interrupt which will allow us to receive the ALIVE
692 * notification (which is Rx) and continue the flow.
693 */
694 trans_pcie->inta_mask = CSR_INT_BIT_ALIVE | CSR_INT_BIT_FH_RX;
695 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask);
696 } else {
697 iwl_enable_hw_int_msk_msix(trans,
698 MSIX_HW_INT_CAUSES_REG_ALIVE);
699 /*
700 * Leave all the FH causes enabled to get the ALIVE
701 * notification.
702 */
703 iwl_enable_fh_int_msk_msix(trans, trans_pcie->fh_init_mask);
704 }
705 }
706
queue_name(struct device * dev,struct iwl_trans_pcie * trans_p,int i)707 static inline const char *queue_name(struct device *dev,
708 struct iwl_trans_pcie *trans_p, int i)
709 {
710 if (trans_p->shared_vec_mask) {
711 int vec = trans_p->shared_vec_mask &
712 IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
713
714 if (i == 0)
715 return DRV_NAME ":shared_IRQ";
716
717 return devm_kasprintf(dev, GFP_KERNEL,
718 DRV_NAME ":queue_%d", i + vec);
719 }
720 if (i == 0)
721 return DRV_NAME ":default_queue";
722
723 if (i == trans_p->alloc_vecs - 1)
724 return DRV_NAME ":exception";
725
726 return devm_kasprintf(dev, GFP_KERNEL,
727 DRV_NAME ":queue_%d", i);
728 }
729
iwl_enable_rfkill_int(struct iwl_trans * trans)730 static inline void iwl_enable_rfkill_int(struct iwl_trans *trans)
731 {
732 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
733
734 IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
735 if (!trans_pcie->msix_enabled) {
736 trans_pcie->inta_mask = CSR_INT_BIT_RF_KILL;
737 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask);
738 } else {
739 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD,
740 trans_pcie->fh_init_mask);
741 iwl_enable_hw_int_msk_msix(trans,
742 MSIX_HW_INT_CAUSES_REG_RF_KILL);
743 }
744
745 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_9000) {
746 /*
747 * On 9000-series devices this bit isn't enabled by default, so
748 * when we power down the device we need set the bit to allow it
749 * to wake up the PCI-E bus for RF-kill interrupts.
750 */
751 iwl_set_bit(trans, CSR_GP_CNTRL,
752 CSR_GP_CNTRL_REG_FLAG_RFKILL_WAKE_L1A_EN);
753 }
754 }
755
756 void iwl_pcie_handle_rfkill_irq(struct iwl_trans *trans);
757
iwl_is_rfkill_set(struct iwl_trans * trans)758 static inline bool iwl_is_rfkill_set(struct iwl_trans *trans)
759 {
760 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
761
762 lockdep_assert_held(&trans_pcie->mutex);
763
764 if (trans_pcie->debug_rfkill == 1)
765 return true;
766
767 return !(iwl_read32(trans, CSR_GP_CNTRL) &
768 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
769 }
770
__iwl_trans_pcie_set_bits_mask(struct iwl_trans * trans,u32 reg,u32 mask,u32 value)771 static inline void __iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans,
772 u32 reg, u32 mask, u32 value)
773 {
774 u32 v;
775
776 #ifdef CONFIG_IWLWIFI_DEBUG
777 WARN_ON_ONCE(value & ~mask);
778 #endif
779
780 v = iwl_read32(trans, reg);
781 v &= ~mask;
782 v |= value;
783 iwl_write32(trans, reg, v);
784 }
785
__iwl_trans_pcie_clear_bit(struct iwl_trans * trans,u32 reg,u32 mask)786 static inline void __iwl_trans_pcie_clear_bit(struct iwl_trans *trans,
787 u32 reg, u32 mask)
788 {
789 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, 0);
790 }
791
__iwl_trans_pcie_set_bit(struct iwl_trans * trans,u32 reg,u32 mask)792 static inline void __iwl_trans_pcie_set_bit(struct iwl_trans *trans,
793 u32 reg, u32 mask)
794 {
795 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, mask);
796 }
797
iwl_pcie_dbg_on(struct iwl_trans * trans)798 static inline bool iwl_pcie_dbg_on(struct iwl_trans *trans)
799 {
800 return (trans->dbg.dest_tlv || iwl_trans_dbg_ini_valid(trans));
801 }
802
803 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state);
804 void iwl_trans_pcie_dump_regs(struct iwl_trans *trans);
805
806 #ifdef CONFIG_IWLWIFI_DEBUGFS
807 void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans);
808 #else
iwl_trans_pcie_dbgfs_register(struct iwl_trans * trans)809 static inline void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans) { }
810 #endif
811
812 void iwl_pcie_rx_allocator_work(struct work_struct *data);
813
814 /* common functions that are used by gen2 transport */
815 int iwl_pcie_gen2_apm_init(struct iwl_trans *trans);
816 void iwl_pcie_apm_config(struct iwl_trans *trans);
817 int iwl_pcie_prepare_card_hw(struct iwl_trans *trans);
818 void iwl_pcie_synchronize_irqs(struct iwl_trans *trans);
819 bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans);
820 void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
821 bool was_in_rfkill);
822 void iwl_pcie_apm_stop_master(struct iwl_trans *trans);
823 void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie);
824 int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans,
825 struct iwl_dma_ptr *ptr, size_t size);
826 void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr);
827 void iwl_pcie_apply_destination(struct iwl_trans *trans);
828
829 /* common functions that are used by gen3 transport */
830 void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power);
831
832 /* transport gen 2 exported functions */
833 int iwl_trans_pcie_gen2_start_fw(struct iwl_trans *trans,
834 const struct fw_img *fw, bool run_in_rfkill);
835 void iwl_trans_pcie_gen2_fw_alive(struct iwl_trans *trans, u32 scd_addr);
836 int iwl_trans_pcie_gen2_send_hcmd(struct iwl_trans *trans,
837 struct iwl_host_cmd *cmd);
838 void iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans);
839 void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans);
840 void iwl_pcie_d3_complete_suspend(struct iwl_trans *trans,
841 bool test, bool reset);
842 int iwl_pcie_gen2_enqueue_hcmd(struct iwl_trans *trans,
843 struct iwl_host_cmd *cmd);
844 int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
845 struct iwl_host_cmd *cmd);
846 void iwl_trans_pcie_copy_imr_fh(struct iwl_trans *trans,
847 u32 dst_addr, u64 src_addr, u32 byte_cnt);
848 int iwl_trans_pcie_copy_imr(struct iwl_trans *trans,
849 u32 dst_addr, u64 src_addr, u32 byte_cnt);
850
851 #endif /* __iwl_trans_int_pcie_h__ */
852