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