1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2003 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11 * Copyright(c) 2018 - 2019 Intel Corporation
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of version 2 of the GNU General Public License as
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19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
22 * The full GNU General Public License is included in this distribution in the
23 * file called COPYING.
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 * Copyright(c) 2003 - 2015 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 - 2019 Intel Corporation
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63 *****************************************************************************/
64 #ifndef __iwl_trans_int_pcie_h__
65 #define __iwl_trans_int_pcie_h__
67 #include <linux/spinlock.h>
68 #include <linux/interrupt.h>
69 #include <linux/skbuff.h>
70 #include <linux/wait.h>
71 #include <linux/pci.h>
72 #include <linux/timer.h>
73 #include <linux/cpu.h>
77 #include "iwl-trans.h"
78 #include "iwl-debug.h"
80 #include "iwl-op-mode.h"
83 /* We need 2 entries for the TX command and header, and another one might
84 * be needed for potential data in the SKB's head. The remaining ones can
87 #define IWL_PCIE_MAX_FRAGS(x) (x->max_tbs - 3)
90 * RX related structures and functions
92 #define RX_NUM_QUEUES 1
93 #define RX_POST_REQ_ALLOC 2
94 #define RX_CLAIM_REQ_ALLOC 8
95 #define RX_PENDING_WATERMARK 16
96 #define FIRST_RX_QUEUE 512
100 /*This file includes the declaration that are internal to the
101 * trans_pcie layer */
104 * struct iwl_rx_mem_buffer
105 * @page_dma: bus address of rxb page
106 * @page: driver's pointer to the rxb page
107 * @invalid: rxb is in driver ownership - not owned by HW
108 * @vid: index of this rxb in the global table
109 * @size: size used from the buffer
111 struct iwl_rx_mem_buffer {
116 struct list_head list;
121 * struct isr_statistics - interrupt statistics
124 struct isr_statistics {
138 #define IWL_RX_TD_TYPE_MSK 0xff000000
139 #define IWL_RX_TD_SIZE_MSK 0x00ffffff
140 #define IWL_RX_TD_SIZE_2K BIT(11)
141 #define IWL_RX_TD_TYPE 0
144 * struct iwl_rx_transfer_desc - transfer descriptor
145 * @type_n_size: buffer type (bit 0: external buff valid,
146 * bit 1: optional footer valid, bit 2-7: reserved)
148 * @addr: ptr to free buffer start address
149 * @rbid: unique tag of the buffer
150 * @reserved: reserved
152 struct iwl_rx_transfer_desc {
159 #define IWL_RX_CD_SIZE 0xffffff00
162 * struct iwl_rx_completion_desc - completion descriptor
163 * @type: buffer type (bit 0: external buff valid,
164 * bit 1: optional footer valid, bit 2-7: reserved)
165 * @status: status of the completion
166 * @reserved1: reserved
167 * @rbid: unique tag of the received buffer
168 * @size: buffer size, masked by IWL_RX_CD_SIZE
169 * @reserved2: reserved
171 struct iwl_rx_completion_desc {
181 * struct iwl_rxq - Rx queue
183 * @bd: driver's pointer to buffer of receive buffer descriptors (rbd).
184 * Address size is 32 bit in pre-9000 devices and 64 bit in 9000 devices.
185 * In 22560 devices it is a pointer to a list of iwl_rx_transfer_desc's
186 * @bd_dma: bus address of buffer of receive buffer descriptors (rbd)
187 * @ubd: driver's pointer to buffer of used receive buffer descriptors (rbd)
188 * @ubd_dma: physical address of buffer of used receive buffer descriptors (rbd)
189 * @tr_tail: driver's pointer to the transmission ring tail buffer
190 * @tr_tail_dma: physical address of the buffer for the transmission ring tail
191 * @cr_tail: driver's pointer to the completion ring tail buffer
192 * @cr_tail_dma: physical address of the buffer for the completion ring tail
193 * @read: Shared index to newest available Rx buffer
194 * @write: Shared index to oldest written Rx packet
195 * @free_count: Number of pre-allocated buffers in rx_free
196 * @used_count: Number of RBDs handled to allocator to use for allocation
198 * @rx_free: list of RBDs with allocated RB ready for use
199 * @rx_used: list of RBDs with no RB attached
200 * @need_update: flag to indicate we need to update read/write index
201 * @rb_stts: driver's pointer to receive buffer status
202 * @rb_stts_dma: bus address of receive buffer status
204 * @queue: actual rx queue. Not used for multi-rx queue.
206 * NOTE: rx_free and rx_used are used as a FIFO for iwl_rx_mem_buffers
215 struct iwl_rx_completion_desc *cd;
217 dma_addr_t used_bd_dma;
219 dma_addr_t tr_tail_dma;
221 dma_addr_t cr_tail_dma;
228 struct list_head rx_free;
229 struct list_head rx_used;
232 dma_addr_t rb_stts_dma;
234 struct napi_struct napi;
235 struct iwl_rx_mem_buffer *queue[RX_QUEUE_SIZE];
239 * struct iwl_rb_allocator - Rx allocator
240 * @req_pending: number of requests the allcator had not processed yet
241 * @req_ready: number of requests honored and ready for claiming
242 * @rbd_allocated: RBDs with pages allocated and ready to be handled to
243 * the queue. This is a list of &struct iwl_rx_mem_buffer
244 * @rbd_empty: RBDs with no page attached for allocator use. This is a list
245 * of &struct iwl_rx_mem_buffer
246 * @lock: protects the rbd_allocated and rbd_empty lists
247 * @alloc_wq: work queue for background calls
248 * @rx_alloc: work struct for background calls
250 struct iwl_rb_allocator {
251 atomic_t req_pending;
253 struct list_head rbd_allocated;
254 struct list_head rbd_empty;
256 struct workqueue_struct *alloc_wq;
257 struct work_struct rx_alloc;
267 * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
268 * @index -- current index
270 static inline int iwl_queue_inc_wrap(struct iwl_trans *trans, int index)
272 return ++index & (trans->cfg->base_params->max_tfd_queue_size - 1);
276 * iwl_get_closed_rb_stts - get closed rb stts from different structs
277 * @rxq - the rxq to get the rb stts from
279 static inline __le16 iwl_get_closed_rb_stts(struct iwl_trans *trans,
282 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
283 __le16 *rb_stts = rxq->rb_stts;
285 return READ_ONCE(*rb_stts);
287 struct iwl_rb_status *rb_stts = rxq->rb_stts;
289 return READ_ONCE(rb_stts->closed_rb_num);
294 * iwl_queue_dec_wrap - decrement queue index, wrap back to end
295 * @index -- current index
297 static inline int iwl_queue_dec_wrap(struct iwl_trans *trans, int index)
299 return --index & (trans->cfg->base_params->max_tfd_queue_size - 1);
302 struct iwl_cmd_meta {
303 /* only for SYNC commands, iff the reply skb is wanted */
304 struct iwl_host_cmd *source;
310 #define TFD_TX_CMD_SLOTS 256
311 #define TFD_CMD_SLOTS 32
314 * The FH will write back to the first TB only, so we need to copy some data
315 * into the buffer regardless of whether it should be mapped or not.
316 * This indicates how big the first TB must be to include the scratch buffer
317 * and the assigned PN.
318 * Since PN location is 8 bytes at offset 12, it's 20 now.
319 * If we make it bigger then allocations will be bigger and copy slower, so
320 * that's probably not useful.
322 #define IWL_FIRST_TB_SIZE 20
323 #define IWL_FIRST_TB_SIZE_ALIGN ALIGN(IWL_FIRST_TB_SIZE, 64)
325 struct iwl_pcie_txq_entry {
326 struct iwl_device_cmd *cmd;
328 /* buffer to free after command completes */
329 const void *free_buf;
330 struct iwl_cmd_meta meta;
333 struct iwl_pcie_first_tb_buf {
334 u8 buf[IWL_FIRST_TB_SIZE_ALIGN];
338 * struct iwl_txq - Tx Queue for DMA
339 * @q: generic Rx/Tx queue descriptor
340 * @tfds: transmit frame descriptors (DMA memory)
341 * @first_tb_bufs: start of command headers, including scratch buffers, for
342 * the writeback -- this is DMA memory and an array holding one buffer
343 * for each command on the queue
344 * @first_tb_dma: DMA address for the first_tb_bufs start
345 * @entries: transmit entries (driver state)
347 * @stuck_timer: timer that fires if queue gets stuck
348 * @trans_pcie: pointer back to transport (for timer)
349 * @need_update: indicates need to update read/write index
350 * @ampdu: true if this queue is an ampdu queue for an specific RA/TID
351 * @wd_timeout: queue watchdog timeout (jiffies) - per queue
352 * @frozen: tx stuck queue timer is frozen
353 * @frozen_expiry_remainder: remember how long until the timer fires
354 * @bc_tbl: byte count table of the queue (relevant only for gen2 transport)
355 * @write_ptr: 1-st empty entry (index) host_w
356 * @read_ptr: last used entry (index) host_r
357 * @dma_addr: physical addr for BD's
358 * @n_window: safe queue window
360 * @low_mark: low watermark, resume queue if free space more than this
361 * @high_mark: high watermark, stop queue if free space less than this
363 * A Tx queue consists of circular buffer of BDs (a.k.a. TFDs, transmit frame
364 * descriptors) and required locking structures.
366 * Note the difference between TFD_QUEUE_SIZE_MAX and n_window: the hardware
367 * always assumes 256 descriptors, so TFD_QUEUE_SIZE_MAX is always 256 (unless
368 * there might be HW changes in the future). For the normal TX
369 * queues, n_window, which is the size of the software queue data
370 * is also 256; however, for the command queue, n_window is only
371 * 32 since we don't need so many commands pending. Since the HW
372 * still uses 256 BDs for DMA though, TFD_QUEUE_SIZE_MAX stays 256.
373 * This means that we end up with the following:
374 * HW entries: | 0 | ... | N * 32 | ... | N * 32 + 31 | ... | 255 |
375 * SW entries: | 0 | ... | 31 |
376 * where N is a number between 0 and 7. This means that the SW
377 * data is a window overlayed over the HW queue.
381 struct iwl_pcie_first_tb_buf *first_tb_bufs;
382 dma_addr_t first_tb_dma;
383 struct iwl_pcie_txq_entry *entries;
385 unsigned long frozen_expiry_remainder;
386 struct timer_list stuck_timer;
387 struct iwl_trans_pcie *trans_pcie;
392 unsigned long wd_timeout;
393 struct sk_buff_head overflow_q;
394 struct iwl_dma_ptr bc_tbl;
407 static inline dma_addr_t
408 iwl_pcie_get_first_tb_dma(struct iwl_txq *txq, int idx)
410 return txq->first_tb_dma +
411 sizeof(struct iwl_pcie_first_tb_buf) * idx;
414 struct iwl_tso_hdr_page {
419 #ifdef CONFIG_IWLWIFI_DEBUGFS
421 * enum iwl_fw_mon_dbgfs_state - the different states of the monitor_data
424 * @IWL_FW_MON_DBGFS_STATE_CLOSED: the file is closed.
425 * @IWL_FW_MON_DBGFS_STATE_OPEN: the file is open.
426 * @IWL_FW_MON_DBGFS_STATE_DISABLED: the file is disabled, once this state is
427 * set the file can no longer be used.
429 enum iwl_fw_mon_dbgfs_state {
430 IWL_FW_MON_DBGFS_STATE_CLOSED,
431 IWL_FW_MON_DBGFS_STATE_OPEN,
432 IWL_FW_MON_DBGFS_STATE_DISABLED,
437 * enum iwl_shared_irq_flags - level of sharing for irq
438 * @IWL_SHARED_IRQ_NON_RX: interrupt vector serves non rx causes.
439 * @IWL_SHARED_IRQ_FIRST_RSS: interrupt vector serves first RSS queue.
441 enum iwl_shared_irq_flags {
442 IWL_SHARED_IRQ_NON_RX = BIT(0),
443 IWL_SHARED_IRQ_FIRST_RSS = BIT(1),
447 * enum iwl_image_response_code - image response values
448 * @IWL_IMAGE_RESP_DEF: the default value of the register
449 * @IWL_IMAGE_RESP_SUCCESS: iml was read successfully
450 * @IWL_IMAGE_RESP_FAIL: iml reading failed
452 enum iwl_image_response_code {
453 IWL_IMAGE_RESP_DEF = 0,
454 IWL_IMAGE_RESP_SUCCESS = 1,
455 IWL_IMAGE_RESP_FAIL = 2,
459 * struct cont_rec: continuous recording data structure
460 * @prev_wr_ptr: the last address that was read in monitor_data
462 * @prev_wrap_cnt: the wrap count that was used during the last read in
463 * monitor_data debugfs file
464 * @state: the state of monitor_data debugfs file as described
465 * in &iwl_fw_mon_dbgfs_state enum
466 * @mutex: locked while reading from monitor_data debugfs file
468 #ifdef CONFIG_IWLWIFI_DEBUGFS
473 /* Used to sync monitor_data debugfs file with driver unload flow */
479 * struct iwl_trans_pcie - PCIe transport specific data
480 * @rxq: all the RX queue data
481 * @rx_pool: initial pool of iwl_rx_mem_buffer for all the queues
482 * @global_table: table mapping received VID from hw to rxb
483 * @rba: allocator for RX replenishing
484 * @ctxt_info: context information for FW self init
485 * @ctxt_info_gen3: context information for gen3 devices
486 * @prph_info: prph info for self init
487 * @prph_scratch: prph scratch for self init
488 * @ctxt_info_dma_addr: dma addr of context information
489 * @prph_info_dma_addr: dma addr of prph info
490 * @prph_scratch_dma_addr: dma addr of prph scratch
491 * @ctxt_info_dma_addr: dma addr of context information
492 * @init_dram: DRAM data of firmware image (including paging).
493 * Context information addresses will be taken from here.
494 * This is driver's local copy for keeping track of size and
495 * count for allocating and freeing the memory.
496 * @trans: pointer to the generic transport area
497 * @scd_base_addr: scheduler sram base address in SRAM
498 * @scd_bc_tbls: pointer to the byte count table of the scheduler
499 * @kw: keep warm address
500 * @pci_dev: basic pci-network driver stuff
501 * @hw_base: pci hardware address support
502 * @ucode_write_complete: indicates that the ucode has been copied.
503 * @ucode_write_waitq: wait queue for uCode load
504 * @cmd_queue - command queue number
505 * @def_rx_queue - default rx queue number
506 * @rx_buf_size: Rx buffer size
507 * @bc_table_dword: true if the BC table expects DWORD (as opposed to bytes)
508 * @scd_set_active: should the transport configure the SCD for HCMD queue
509 * @sw_csum_tx: if true, then the transport will compute the csum of the TXed
511 * @rx_page_order: page order for receive buffer size
512 * @reg_lock: protect hw register access
513 * @mutex: to protect stop_device / start_fw / start_hw
514 * @cmd_in_flight: true when we have a host command in flight
515 #ifdef CONFIG_IWLWIFI_DEBUGFS
516 * @fw_mon_data: fw continuous recording data
518 * @msix_entries: array of MSI-X entries
519 * @msix_enabled: true if managed to enable MSI-X
520 * @shared_vec_mask: the type of causes the shared vector handles
521 * (see iwl_shared_irq_flags).
522 * @alloc_vecs: the number of interrupt vectors allocated by the OS
523 * @def_irq: default irq for non rx causes
524 * @fh_init_mask: initial unmasked fh causes
525 * @hw_init_mask: initial unmasked hw causes
526 * @fh_mask: current unmasked fh causes
527 * @hw_mask: current unmasked hw causes
528 * @in_rescan: true if we have triggered a device rescan
529 * @base_rb_stts: base virtual address of receive buffer status for all queues
530 * @base_rb_stts_dma: base physical address of receive buffer status
532 struct iwl_trans_pcie {
534 struct iwl_rx_mem_buffer rx_pool[RX_POOL_SIZE];
535 struct iwl_rx_mem_buffer *global_table[RX_POOL_SIZE];
536 struct iwl_rb_allocator rba;
538 struct iwl_context_info *ctxt_info;
539 struct iwl_context_info_gen3 *ctxt_info_gen3;
541 struct iwl_prph_info *prph_info;
542 struct iwl_prph_scratch *prph_scratch;
543 dma_addr_t ctxt_info_dma_addr;
544 dma_addr_t prph_info_dma_addr;
545 dma_addr_t prph_scratch_dma_addr;
546 dma_addr_t iml_dma_addr;
547 struct iwl_trans *trans;
549 struct net_device napi_dev;
551 struct __percpu iwl_tso_hdr_page *tso_hdr_page;
555 dma_addr_t ict_tbl_dma;
558 bool is_down, opmode_down;
560 struct isr_statistics isr_stats;
566 struct iwl_dma_ptr scd_bc_tbls;
567 struct iwl_dma_ptr kw;
569 struct iwl_txq *txq_memory;
570 struct iwl_txq *txq[IWL_MAX_TVQM_QUEUES];
571 unsigned long queue_used[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
572 unsigned long queue_stopped[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
574 /* PCI bus related data */
575 struct pci_dev *pci_dev;
576 void __iomem *hw_base;
578 bool ucode_write_complete;
579 wait_queue_head_t ucode_write_waitq;
580 wait_queue_head_t wait_command_queue;
581 wait_queue_head_t d0i3_waitq;
583 u8 page_offs, dev_cmd_offs;
588 unsigned int cmd_q_wdg_timeout;
589 u8 n_no_reclaim_cmds;
590 u8 no_reclaim_cmds[MAX_NO_RECLAIM_CMDS];
594 enum iwl_amsdu_size rx_buf_size;
598 bool pcie_dbg_dumped_once;
601 /*protect hw register */
603 bool cmd_hold_nic_awake;
604 bool ref_cmd_in_flight;
606 #ifdef CONFIG_IWLWIFI_DEBUGFS
607 struct cont_rec fw_mon_data;
610 struct msix_entry msix_entries[IWL_MAX_RX_HW_QUEUES];
619 cpumask_t affinity_mask[IWL_MAX_RX_HW_QUEUES];
620 u16 tx_cmd_queue_size;
624 dma_addr_t base_rb_stts_dma;
627 static inline struct iwl_trans_pcie *
628 IWL_TRANS_GET_PCIE_TRANS(struct iwl_trans *trans)
630 return (void *)trans->trans_specific;
633 static inline void iwl_pcie_clear_irq(struct iwl_trans *trans,
634 struct msix_entry *entry)
637 * Before sending the interrupt the HW disables it to prevent
638 * a nested interrupt. This is done by writing 1 to the corresponding
639 * bit in the mask register. After handling the interrupt, it should be
640 * re-enabled by clearing this bit. This register is defined as
641 * write 1 clear (W1C) register, meaning that it's being clear
642 * by writing 1 to the bit.
644 iwl_write32(trans, CSR_MSIX_AUTOMASK_ST_AD, BIT(entry->entry));
647 static inline struct iwl_trans *
648 iwl_trans_pcie_get_trans(struct iwl_trans_pcie *trans_pcie)
650 return container_of((void *)trans_pcie, struct iwl_trans,
655 * Convention: trans API functions: iwl_trans_pcie_XXX
656 * Other functions: iwl_pcie_XXX
658 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
659 const struct pci_device_id *ent,
660 const struct iwl_cfg *cfg);
661 void iwl_trans_pcie_free(struct iwl_trans *trans);
663 /*****************************************************
665 ******************************************************/
666 int _iwl_pcie_rx_init(struct iwl_trans *trans);
667 int iwl_pcie_rx_init(struct iwl_trans *trans);
668 int iwl_pcie_gen2_rx_init(struct iwl_trans *trans);
669 irqreturn_t iwl_pcie_msix_isr(int irq, void *data);
670 irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id);
671 irqreturn_t iwl_pcie_irq_msix_handler(int irq, void *dev_id);
672 irqreturn_t iwl_pcie_irq_rx_msix_handler(int irq, void *dev_id);
673 int iwl_pcie_rx_stop(struct iwl_trans *trans);
674 void iwl_pcie_rx_free(struct iwl_trans *trans);
675 void iwl_pcie_free_rbs_pool(struct iwl_trans *trans);
676 void iwl_pcie_rx_init_rxb_lists(struct iwl_rxq *rxq);
677 int iwl_pcie_dummy_napi_poll(struct napi_struct *napi, int budget);
678 void iwl_pcie_rxq_alloc_rbs(struct iwl_trans *trans, gfp_t priority,
679 struct iwl_rxq *rxq);
680 int iwl_pcie_rx_alloc(struct iwl_trans *trans);
682 /*****************************************************
683 * ICT - interrupt handling
684 ******************************************************/
685 irqreturn_t iwl_pcie_isr(int irq, void *data);
686 int iwl_pcie_alloc_ict(struct iwl_trans *trans);
687 void iwl_pcie_free_ict(struct iwl_trans *trans);
688 void iwl_pcie_reset_ict(struct iwl_trans *trans);
689 void iwl_pcie_disable_ict(struct iwl_trans *trans);
691 /*****************************************************
693 ******************************************************/
694 int iwl_pcie_tx_init(struct iwl_trans *trans);
695 int iwl_pcie_gen2_tx_init(struct iwl_trans *trans, int txq_id,
697 void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr);
698 int iwl_pcie_tx_stop(struct iwl_trans *trans);
699 void iwl_pcie_tx_free(struct iwl_trans *trans);
700 bool iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int queue, u16 ssn,
701 const struct iwl_trans_txq_scd_cfg *cfg,
702 unsigned int wdg_timeout);
703 void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue,
705 void iwl_trans_pcie_txq_set_shared_mode(struct iwl_trans *trans, u32 txq_id,
707 void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans,
708 struct iwl_txq *txq);
709 int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
710 struct iwl_device_cmd *dev_cmd, int txq_id);
711 void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans);
712 int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd);
713 void iwl_pcie_cmdq_reclaim(struct iwl_trans *trans, int txq_id, int idx);
714 void iwl_pcie_gen2_txq_inc_wr_ptr(struct iwl_trans *trans,
715 struct iwl_txq *txq);
716 void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
717 struct iwl_rx_cmd_buffer *rxb);
718 void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
719 struct sk_buff_head *skbs);
720 void iwl_trans_pcie_tx_reset(struct iwl_trans *trans);
721 void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans_pcie *trans_pcie,
722 struct iwl_txq *txq, u16 byte_cnt,
725 static inline u16 iwl_pcie_tfd_tb_get_len(struct iwl_trans *trans, void *_tfd,
728 if (trans->cfg->use_tfh) {
729 struct iwl_tfh_tfd *tfd = _tfd;
730 struct iwl_tfh_tb *tb = &tfd->tbs[idx];
732 return le16_to_cpu(tb->tb_len);
734 struct iwl_tfd *tfd = _tfd;
735 struct iwl_tfd_tb *tb = &tfd->tbs[idx];
737 return le16_to_cpu(tb->hi_n_len) >> 4;
741 /*****************************************************
743 ******************************************************/
744 void iwl_pcie_dump_csr(struct iwl_trans *trans);
746 /*****************************************************
748 ******************************************************/
749 static inline void _iwl_disable_interrupts(struct iwl_trans *trans)
751 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
753 clear_bit(STATUS_INT_ENABLED, &trans->status);
754 if (!trans_pcie->msix_enabled) {
755 /* disable interrupts from uCode/NIC to host */
756 iwl_write32(trans, CSR_INT_MASK, 0x00000000);
758 /* acknowledge/clear/reset any interrupts still pending
759 * from uCode or flow handler (Rx/Tx DMA) */
760 iwl_write32(trans, CSR_INT, 0xffffffff);
761 iwl_write32(trans, CSR_FH_INT_STATUS, 0xffffffff);
763 /* disable all the interrupt we might use */
764 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD,
765 trans_pcie->fh_init_mask);
766 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD,
767 trans_pcie->hw_init_mask);
769 IWL_DEBUG_ISR(trans, "Disabled interrupts\n");
772 #define IWL_NUM_OF_COMPLETION_RINGS 31
773 #define IWL_NUM_OF_TRANSFER_RINGS 527
775 static inline int iwl_pcie_get_num_sections(const struct fw_img *fw,
780 while (start < fw->num_sec &&
781 fw->sec[start].offset != CPU1_CPU2_SEPARATOR_SECTION &&
782 fw->sec[start].offset != PAGING_SEPARATOR_SECTION) {
790 static inline int iwl_pcie_ctxt_info_alloc_dma(struct iwl_trans *trans,
791 const struct fw_desc *sec,
792 struct iwl_dram_data *dram)
794 dram->block = dma_alloc_coherent(trans->dev, sec->len,
800 dram->size = sec->len;
801 memcpy(dram->block, sec->data, sec->len);
806 static inline void iwl_pcie_ctxt_info_free_fw_img(struct iwl_trans *trans)
808 struct iwl_self_init_dram *dram = &trans->init_dram;
812 WARN_ON(dram->fw_cnt);
816 for (i = 0; i < dram->fw_cnt; i++)
817 dma_free_coherent(trans->dev, dram->fw[i].size,
818 dram->fw[i].block, dram->fw[i].physical);
825 static inline void iwl_disable_interrupts(struct iwl_trans *trans)
827 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
829 spin_lock(&trans_pcie->irq_lock);
830 _iwl_disable_interrupts(trans);
831 spin_unlock(&trans_pcie->irq_lock);
834 static inline void _iwl_enable_interrupts(struct iwl_trans *trans)
836 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
838 IWL_DEBUG_ISR(trans, "Enabling interrupts\n");
839 set_bit(STATUS_INT_ENABLED, &trans->status);
840 if (!trans_pcie->msix_enabled) {
841 trans_pcie->inta_mask = CSR_INI_SET_MASK;
842 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask);
845 * fh/hw_mask keeps all the unmasked causes.
846 * Unlike msi, in msix cause is enabled when it is unset.
848 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
849 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
850 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD,
851 ~trans_pcie->fh_mask);
852 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD,
853 ~trans_pcie->hw_mask);
857 static inline void iwl_enable_interrupts(struct iwl_trans *trans)
859 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
861 spin_lock(&trans_pcie->irq_lock);
862 _iwl_enable_interrupts(trans);
863 spin_unlock(&trans_pcie->irq_lock);
865 static inline void iwl_enable_hw_int_msk_msix(struct iwl_trans *trans, u32 msk)
867 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
869 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD, ~msk);
870 trans_pcie->hw_mask = msk;
873 static inline void iwl_enable_fh_int_msk_msix(struct iwl_trans *trans, u32 msk)
875 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
877 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~msk);
878 trans_pcie->fh_mask = msk;
881 static inline void iwl_enable_fw_load_int(struct iwl_trans *trans)
883 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
885 IWL_DEBUG_ISR(trans, "Enabling FW load interrupt\n");
886 if (!trans_pcie->msix_enabled) {
887 trans_pcie->inta_mask = CSR_INT_BIT_FH_TX;
888 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask);
890 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD,
891 trans_pcie->hw_init_mask);
892 iwl_enable_fh_int_msk_msix(trans,
893 MSIX_FH_INT_CAUSES_D2S_CH0_NUM);
897 static inline u16 iwl_pcie_get_cmd_index(const struct iwl_txq *q, u32 index)
899 return index & (q->n_window - 1);
902 static inline void *iwl_pcie_get_tfd(struct iwl_trans *trans,
903 struct iwl_txq *txq, int idx)
905 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
907 if (trans->cfg->use_tfh)
908 idx = iwl_pcie_get_cmd_index(txq, idx);
910 return txq->tfds + trans_pcie->tfd_size * idx;
913 static inline const char *queue_name(struct device *dev,
914 struct iwl_trans_pcie *trans_p, int i)
916 if (trans_p->shared_vec_mask) {
917 int vec = trans_p->shared_vec_mask &
918 IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
921 return DRV_NAME ": shared IRQ";
923 return devm_kasprintf(dev, GFP_KERNEL,
924 DRV_NAME ": queue %d", i + vec);
927 return DRV_NAME ": default queue";
929 if (i == trans_p->alloc_vecs - 1)
930 return DRV_NAME ": exception";
932 return devm_kasprintf(dev, GFP_KERNEL,
933 DRV_NAME ": queue %d", i);
936 static inline void iwl_enable_rfkill_int(struct iwl_trans *trans)
938 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
940 IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
941 if (!trans_pcie->msix_enabled) {
942 trans_pcie->inta_mask = CSR_INT_BIT_RF_KILL;
943 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask);
945 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD,
946 trans_pcie->fh_init_mask);
947 iwl_enable_hw_int_msk_msix(trans,
948 MSIX_HW_INT_CAUSES_REG_RF_KILL);
951 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_9000) {
953 * On 9000-series devices this bit isn't enabled by default, so
954 * when we power down the device we need set the bit to allow it
955 * to wake up the PCI-E bus for RF-kill interrupts.
957 iwl_set_bit(trans, CSR_GP_CNTRL,
958 CSR_GP_CNTRL_REG_FLAG_RFKILL_WAKE_L1A_EN);
962 void iwl_pcie_handle_rfkill_irq(struct iwl_trans *trans);
964 static inline void iwl_wake_queue(struct iwl_trans *trans,
967 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
969 if (test_and_clear_bit(txq->id, trans_pcie->queue_stopped)) {
970 IWL_DEBUG_TX_QUEUES(trans, "Wake hwq %d\n", txq->id);
971 iwl_op_mode_queue_not_full(trans->op_mode, txq->id);
975 static inline void iwl_stop_queue(struct iwl_trans *trans,
978 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
980 if (!test_and_set_bit(txq->id, trans_pcie->queue_stopped)) {
981 iwl_op_mode_queue_full(trans->op_mode, txq->id);
982 IWL_DEBUG_TX_QUEUES(trans, "Stop hwq %d\n", txq->id);
984 IWL_DEBUG_TX_QUEUES(trans, "hwq %d already stopped\n",
988 static inline bool iwl_queue_used(const struct iwl_txq *q, int i)
990 int index = iwl_pcie_get_cmd_index(q, i);
991 int r = iwl_pcie_get_cmd_index(q, q->read_ptr);
992 int w = iwl_pcie_get_cmd_index(q, q->write_ptr);
995 (index >= r && index < w) :
996 !(index < r && index >= w);
999 static inline bool iwl_is_rfkill_set(struct iwl_trans *trans)
1001 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1003 lockdep_assert_held(&trans_pcie->mutex);
1005 if (trans_pcie->debug_rfkill)
1008 return !(iwl_read32(trans, CSR_GP_CNTRL) &
1009 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
1012 static inline void __iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans,
1013 u32 reg, u32 mask, u32 value)
1017 #ifdef CONFIG_IWLWIFI_DEBUG
1018 WARN_ON_ONCE(value & ~mask);
1021 v = iwl_read32(trans, reg);
1024 iwl_write32(trans, reg, v);
1027 static inline void __iwl_trans_pcie_clear_bit(struct iwl_trans *trans,
1030 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, 0);
1033 static inline void __iwl_trans_pcie_set_bit(struct iwl_trans *trans,
1036 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, mask);
1039 static inline bool iwl_pcie_dbg_on(struct iwl_trans *trans)
1041 return (trans->dbg_dest_tlv || trans->ini_valid);
1044 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state);
1045 void iwl_trans_pcie_dump_regs(struct iwl_trans *trans);
1046 void iwl_trans_sync_nmi(struct iwl_trans *trans);
1048 #ifdef CONFIG_IWLWIFI_DEBUGFS
1049 int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans);
1051 static inline int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
1057 int iwl_pci_fw_exit_d0i3(struct iwl_trans *trans);
1058 int iwl_pci_fw_enter_d0i3(struct iwl_trans *trans);
1060 void iwl_pcie_rx_allocator_work(struct work_struct *data);
1062 /* common functions that are used by gen2 transport */
1063 int iwl_pcie_gen2_apm_init(struct iwl_trans *trans);
1064 void iwl_pcie_apm_config(struct iwl_trans *trans);
1065 int iwl_pcie_prepare_card_hw(struct iwl_trans *trans);
1066 void iwl_pcie_synchronize_irqs(struct iwl_trans *trans);
1067 bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans);
1068 void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
1069 bool was_in_rfkill);
1070 void iwl_pcie_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq);
1071 int iwl_queue_space(struct iwl_trans *trans, const struct iwl_txq *q);
1072 void iwl_pcie_apm_stop_master(struct iwl_trans *trans);
1073 void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie);
1074 int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq,
1075 int slots_num, bool cmd_queue);
1076 int iwl_pcie_txq_alloc(struct iwl_trans *trans,
1077 struct iwl_txq *txq, int slots_num, bool cmd_queue);
1078 int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans,
1079 struct iwl_dma_ptr *ptr, size_t size);
1080 void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr);
1081 void iwl_pcie_apply_destination(struct iwl_trans *trans);
1082 void iwl_pcie_free_tso_page(struct iwl_trans_pcie *trans_pcie,
1083 struct sk_buff *skb);
1085 struct iwl_tso_hdr_page *get_page_hdr(struct iwl_trans *trans, size_t len);
1088 /* common functions that are used by gen3 transport */
1089 void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power);
1091 /* transport gen 2 exported functions */
1092 int iwl_trans_pcie_gen2_start_fw(struct iwl_trans *trans,
1093 const struct fw_img *fw, bool run_in_rfkill);
1094 void iwl_trans_pcie_gen2_fw_alive(struct iwl_trans *trans, u32 scd_addr);
1095 void iwl_pcie_gen2_txq_free_memory(struct iwl_trans *trans,
1096 struct iwl_txq *txq);
1097 int iwl_trans_pcie_dyn_txq_alloc_dma(struct iwl_trans *trans,
1098 struct iwl_txq **intxq, int size,
1099 unsigned int timeout);
1100 int iwl_trans_pcie_txq_alloc_response(struct iwl_trans *trans,
1101 struct iwl_txq *txq,
1102 struct iwl_host_cmd *hcmd);
1103 int iwl_trans_pcie_dyn_txq_alloc(struct iwl_trans *trans,
1104 __le16 flags, u8 sta_id, u8 tid,
1105 int cmd_id, int size,
1106 unsigned int timeout);
1107 void iwl_trans_pcie_dyn_txq_free(struct iwl_trans *trans, int queue);
1108 int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
1109 struct iwl_device_cmd *dev_cmd, int txq_id);
1110 int iwl_trans_pcie_gen2_send_hcmd(struct iwl_trans *trans,
1111 struct iwl_host_cmd *cmd);
1112 void iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans,
1114 void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans, bool low_power);
1115 void iwl_pcie_gen2_txq_unmap(struct iwl_trans *trans, int txq_id);
1116 void iwl_pcie_gen2_tx_free(struct iwl_trans *trans);
1117 void iwl_pcie_gen2_tx_stop(struct iwl_trans *trans);
1118 #endif /* __iwl_trans_int_pcie_h__ */