1 /****************************************************************************** 2 * 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. 5 * 6 * GPL LICENSE SUMMARY 7 * 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 12 * 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 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 20 * more details. 21 * 22 * The full GNU General Public License is included in this distribution in the 23 * file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 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 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 *****************************************************************************/ 64 #ifndef __iwl_trans_int_pcie_h__ 65 #define __iwl_trans_int_pcie_h__ 66 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> 74 75 #include "iwl-fh.h" 76 #include "iwl-csr.h" 77 #include "iwl-trans.h" 78 #include "iwl-debug.h" 79 #include "iwl-io.h" 80 #include "iwl-op-mode.h" 81 #include "iwl-drv.h" 82 #include "queue/tx.h" 83 84 /* 85 * RX related structures and functions 86 */ 87 #define RX_NUM_QUEUES 1 88 #define RX_POST_REQ_ALLOC 2 89 #define RX_CLAIM_REQ_ALLOC 8 90 #define RX_PENDING_WATERMARK 16 91 #define FIRST_RX_QUEUE 512 92 93 struct iwl_host_cmd; 94 95 /*This file includes the declaration that are internal to the 96 * trans_pcie layer */ 97 98 /** 99 * struct iwl_rx_mem_buffer 100 * @page_dma: bus address of rxb page 101 * @page: driver's pointer to the rxb page 102 * @invalid: rxb is in driver ownership - not owned by HW 103 * @vid: index of this rxb in the global table 104 * @offset: indicates which offset of the page (in bytes) 105 * this buffer uses (if multiple RBs fit into one page) 106 */ 107 struct iwl_rx_mem_buffer { 108 dma_addr_t page_dma; 109 struct page *page; 110 u16 vid; 111 bool invalid; 112 struct list_head list; 113 u32 offset; 114 }; 115 116 /** 117 * struct isr_statistics - interrupt statistics 118 * 119 */ 120 struct isr_statistics { 121 u32 hw; 122 u32 sw; 123 u32 err_code; 124 u32 sch; 125 u32 alive; 126 u32 rfkill; 127 u32 ctkill; 128 u32 wakeup; 129 u32 rx; 130 u32 tx; 131 u32 unhandled; 132 }; 133 134 /** 135 * struct iwl_rx_transfer_desc - transfer descriptor 136 * @addr: ptr to free buffer start address 137 * @rbid: unique tag of the buffer 138 * @reserved: reserved 139 */ 140 struct iwl_rx_transfer_desc { 141 __le16 rbid; 142 __le16 reserved[3]; 143 __le64 addr; 144 } __packed; 145 146 #define IWL_RX_CD_FLAGS_FRAGMENTED BIT(0) 147 148 /** 149 * struct iwl_rx_completion_desc - completion descriptor 150 * @reserved1: reserved 151 * @rbid: unique tag of the received buffer 152 * @flags: flags (0: fragmented, all others: reserved) 153 * @reserved2: reserved 154 */ 155 struct iwl_rx_completion_desc { 156 __le32 reserved1; 157 __le16 rbid; 158 u8 flags; 159 u8 reserved2[25]; 160 } __packed; 161 162 /** 163 * struct iwl_rxq - Rx queue 164 * @id: queue index 165 * @bd: driver's pointer to buffer of receive buffer descriptors (rbd). 166 * Address size is 32 bit in pre-9000 devices and 64 bit in 9000 devices. 167 * In AX210 devices it is a pointer to a list of iwl_rx_transfer_desc's 168 * @bd_dma: bus address of buffer of receive buffer descriptors (rbd) 169 * @ubd: driver's pointer to buffer of used receive buffer descriptors (rbd) 170 * @ubd_dma: physical address of buffer of used receive buffer descriptors (rbd) 171 * @tr_tail: driver's pointer to the transmission ring tail buffer 172 * @tr_tail_dma: physical address of the buffer for the transmission ring tail 173 * @cr_tail: driver's pointer to the completion ring tail buffer 174 * @cr_tail_dma: physical address of the buffer for the completion ring tail 175 * @read: Shared index to newest available Rx buffer 176 * @write: Shared index to oldest written Rx packet 177 * @free_count: Number of pre-allocated buffers in rx_free 178 * @used_count: Number of RBDs handled to allocator to use for allocation 179 * @write_actual: 180 * @rx_free: list of RBDs with allocated RB ready for use 181 * @rx_used: list of RBDs with no RB attached 182 * @need_update: flag to indicate we need to update read/write index 183 * @rb_stts: driver's pointer to receive buffer status 184 * @rb_stts_dma: bus address of receive buffer status 185 * @lock: 186 * @queue: actual rx queue. Not used for multi-rx queue. 187 * @next_rb_is_fragment: indicates that the previous RB that we handled set 188 * the fragmented flag, so the next one is still another fragment 189 * 190 * NOTE: rx_free and rx_used are used as a FIFO for iwl_rx_mem_buffers 191 */ 192 struct iwl_rxq { 193 int id; 194 void *bd; 195 dma_addr_t bd_dma; 196 union { 197 void *used_bd; 198 __le32 *bd_32; 199 struct iwl_rx_completion_desc *cd; 200 }; 201 dma_addr_t used_bd_dma; 202 __le16 *tr_tail; 203 dma_addr_t tr_tail_dma; 204 __le16 *cr_tail; 205 dma_addr_t cr_tail_dma; 206 u32 read; 207 u32 write; 208 u32 free_count; 209 u32 used_count; 210 u32 write_actual; 211 u32 queue_size; 212 struct list_head rx_free; 213 struct list_head rx_used; 214 bool need_update, next_rb_is_fragment; 215 void *rb_stts; 216 dma_addr_t rb_stts_dma; 217 spinlock_t lock; 218 struct napi_struct napi; 219 struct iwl_rx_mem_buffer *queue[RX_QUEUE_SIZE]; 220 }; 221 222 /** 223 * struct iwl_rb_allocator - Rx allocator 224 * @req_pending: number of requests the allcator had not processed yet 225 * @req_ready: number of requests honored and ready for claiming 226 * @rbd_allocated: RBDs with pages allocated and ready to be handled to 227 * the queue. This is a list of &struct iwl_rx_mem_buffer 228 * @rbd_empty: RBDs with no page attached for allocator use. This is a list 229 * of &struct iwl_rx_mem_buffer 230 * @lock: protects the rbd_allocated and rbd_empty lists 231 * @alloc_wq: work queue for background calls 232 * @rx_alloc: work struct for background calls 233 */ 234 struct iwl_rb_allocator { 235 atomic_t req_pending; 236 atomic_t req_ready; 237 struct list_head rbd_allocated; 238 struct list_head rbd_empty; 239 spinlock_t lock; 240 struct workqueue_struct *alloc_wq; 241 struct work_struct rx_alloc; 242 }; 243 244 /** 245 * iwl_get_closed_rb_stts - get closed rb stts from different structs 246 * @rxq - the rxq to get the rb stts from 247 */ 248 static inline __le16 iwl_get_closed_rb_stts(struct iwl_trans *trans, 249 struct iwl_rxq *rxq) 250 { 251 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 252 __le16 *rb_stts = rxq->rb_stts; 253 254 return READ_ONCE(*rb_stts); 255 } else { 256 struct iwl_rb_status *rb_stts = rxq->rb_stts; 257 258 return READ_ONCE(rb_stts->closed_rb_num); 259 } 260 } 261 262 #ifdef CONFIG_IWLWIFI_DEBUGFS 263 /** 264 * enum iwl_fw_mon_dbgfs_state - the different states of the monitor_data 265 * debugfs file 266 * 267 * @IWL_FW_MON_DBGFS_STATE_CLOSED: the file is closed. 268 * @IWL_FW_MON_DBGFS_STATE_OPEN: the file is open. 269 * @IWL_FW_MON_DBGFS_STATE_DISABLED: the file is disabled, once this state is 270 * set the file can no longer be used. 271 */ 272 enum iwl_fw_mon_dbgfs_state { 273 IWL_FW_MON_DBGFS_STATE_CLOSED, 274 IWL_FW_MON_DBGFS_STATE_OPEN, 275 IWL_FW_MON_DBGFS_STATE_DISABLED, 276 }; 277 #endif 278 279 /** 280 * enum iwl_shared_irq_flags - level of sharing for irq 281 * @IWL_SHARED_IRQ_NON_RX: interrupt vector serves non rx causes. 282 * @IWL_SHARED_IRQ_FIRST_RSS: interrupt vector serves first RSS queue. 283 */ 284 enum iwl_shared_irq_flags { 285 IWL_SHARED_IRQ_NON_RX = BIT(0), 286 IWL_SHARED_IRQ_FIRST_RSS = BIT(1), 287 }; 288 289 /** 290 * enum iwl_image_response_code - image response values 291 * @IWL_IMAGE_RESP_DEF: the default value of the register 292 * @IWL_IMAGE_RESP_SUCCESS: iml was read successfully 293 * @IWL_IMAGE_RESP_FAIL: iml reading failed 294 */ 295 enum iwl_image_response_code { 296 IWL_IMAGE_RESP_DEF = 0, 297 IWL_IMAGE_RESP_SUCCESS = 1, 298 IWL_IMAGE_RESP_FAIL = 2, 299 }; 300 301 /** 302 * struct cont_rec: continuous recording data structure 303 * @prev_wr_ptr: the last address that was read in monitor_data 304 * debugfs file 305 * @prev_wrap_cnt: the wrap count that was used during the last read in 306 * monitor_data debugfs file 307 * @state: the state of monitor_data debugfs file as described 308 * in &iwl_fw_mon_dbgfs_state enum 309 * @mutex: locked while reading from monitor_data debugfs file 310 */ 311 #ifdef CONFIG_IWLWIFI_DEBUGFS 312 struct cont_rec { 313 u32 prev_wr_ptr; 314 u32 prev_wrap_cnt; 315 u8 state; 316 /* Used to sync monitor_data debugfs file with driver unload flow */ 317 struct mutex mutex; 318 }; 319 #endif 320 321 /** 322 * struct iwl_trans_pcie - PCIe transport specific data 323 * @rxq: all the RX queue data 324 * @rx_pool: initial pool of iwl_rx_mem_buffer for all the queues 325 * @global_table: table mapping received VID from hw to rxb 326 * @rba: allocator for RX replenishing 327 * @ctxt_info: context information for FW self init 328 * @ctxt_info_gen3: context information for gen3 devices 329 * @prph_info: prph info for self init 330 * @prph_scratch: prph scratch for self init 331 * @ctxt_info_dma_addr: dma addr of context information 332 * @prph_info_dma_addr: dma addr of prph info 333 * @prph_scratch_dma_addr: dma addr of prph scratch 334 * @ctxt_info_dma_addr: dma addr of context information 335 * @init_dram: DRAM data of firmware image (including paging). 336 * Context information addresses will be taken from here. 337 * This is driver's local copy for keeping track of size and 338 * count for allocating and freeing the memory. 339 * @trans: pointer to the generic transport area 340 * @scd_base_addr: scheduler sram base address in SRAM 341 * @kw: keep warm address 342 * @pnvm_dram: DRAM area that contains the PNVM data 343 * @pci_dev: basic pci-network driver stuff 344 * @hw_base: pci hardware address support 345 * @ucode_write_complete: indicates that the ucode has been copied. 346 * @ucode_write_waitq: wait queue for uCode load 347 * @cmd_queue - command queue number 348 * @def_rx_queue - default rx queue number 349 * @rx_buf_size: Rx buffer size 350 * @scd_set_active: should the transport configure the SCD for HCMD queue 351 * @sw_csum_tx: if true, then the transport will compute the csum of the TXed 352 * frame. 353 * @rx_page_order: page order for receive buffer size 354 * @rx_buf_bytes: RX buffer (RB) size in bytes 355 * @reg_lock: protect hw register access 356 * @mutex: to protect stop_device / start_fw / start_hw 357 * @cmd_in_flight: true when we have a host command in flight 358 #ifdef CONFIG_IWLWIFI_DEBUGFS 359 * @fw_mon_data: fw continuous recording data 360 #endif 361 * @msix_entries: array of MSI-X entries 362 * @msix_enabled: true if managed to enable MSI-X 363 * @shared_vec_mask: the type of causes the shared vector handles 364 * (see iwl_shared_irq_flags). 365 * @alloc_vecs: the number of interrupt vectors allocated by the OS 366 * @def_irq: default irq for non rx causes 367 * @fh_init_mask: initial unmasked fh causes 368 * @hw_init_mask: initial unmasked hw causes 369 * @fh_mask: current unmasked fh causes 370 * @hw_mask: current unmasked hw causes 371 * @in_rescan: true if we have triggered a device rescan 372 * @base_rb_stts: base virtual address of receive buffer status for all queues 373 * @base_rb_stts_dma: base physical address of receive buffer status 374 * @supported_dma_mask: DMA mask to validate the actual address against, 375 * will be DMA_BIT_MASK(11) or DMA_BIT_MASK(12) depending on the device 376 * @alloc_page_lock: spinlock for the page allocator 377 * @alloc_page: allocated page to still use parts of 378 * @alloc_page_used: how much of the allocated page was already used (bytes) 379 */ 380 struct iwl_trans_pcie { 381 struct iwl_rxq *rxq; 382 struct iwl_rx_mem_buffer *rx_pool; 383 struct iwl_rx_mem_buffer **global_table; 384 struct iwl_rb_allocator rba; 385 union { 386 struct iwl_context_info *ctxt_info; 387 struct iwl_context_info_gen3 *ctxt_info_gen3; 388 }; 389 struct iwl_prph_info *prph_info; 390 struct iwl_prph_scratch *prph_scratch; 391 dma_addr_t ctxt_info_dma_addr; 392 dma_addr_t prph_info_dma_addr; 393 dma_addr_t prph_scratch_dma_addr; 394 dma_addr_t iml_dma_addr; 395 struct iwl_trans *trans; 396 397 struct net_device napi_dev; 398 399 /* INT ICT Table */ 400 __le32 *ict_tbl; 401 dma_addr_t ict_tbl_dma; 402 int ict_index; 403 bool use_ict; 404 bool is_down, opmode_down; 405 s8 debug_rfkill; 406 struct isr_statistics isr_stats; 407 408 spinlock_t irq_lock; 409 struct mutex mutex; 410 u32 inta_mask; 411 u32 scd_base_addr; 412 struct iwl_dma_ptr kw; 413 414 struct iwl_dram_data pnvm_dram; 415 416 struct iwl_txq *txq_memory; 417 418 /* PCI bus related data */ 419 struct pci_dev *pci_dev; 420 void __iomem *hw_base; 421 422 bool ucode_write_complete; 423 bool sx_complete; 424 wait_queue_head_t ucode_write_waitq; 425 wait_queue_head_t wait_command_queue; 426 wait_queue_head_t sx_waitq; 427 428 u8 def_rx_queue; 429 u8 n_no_reclaim_cmds; 430 u8 no_reclaim_cmds[MAX_NO_RECLAIM_CMDS]; 431 u16 num_rx_bufs; 432 433 enum iwl_amsdu_size rx_buf_size; 434 bool scd_set_active; 435 bool sw_csum_tx; 436 bool pcie_dbg_dumped_once; 437 u32 rx_page_order; 438 u32 rx_buf_bytes; 439 u32 supported_dma_mask; 440 441 /* allocator lock for the two values below */ 442 spinlock_t alloc_page_lock; 443 struct page *alloc_page; 444 u32 alloc_page_used; 445 446 /*protect hw register */ 447 spinlock_t reg_lock; 448 bool cmd_hold_nic_awake; 449 450 #ifdef CONFIG_IWLWIFI_DEBUGFS 451 struct cont_rec fw_mon_data; 452 #endif 453 454 struct msix_entry msix_entries[IWL_MAX_RX_HW_QUEUES]; 455 bool msix_enabled; 456 u8 shared_vec_mask; 457 u32 alloc_vecs; 458 u32 def_irq; 459 u32 fh_init_mask; 460 u32 hw_init_mask; 461 u32 fh_mask; 462 u32 hw_mask; 463 cpumask_t affinity_mask[IWL_MAX_RX_HW_QUEUES]; 464 u16 tx_cmd_queue_size; 465 bool in_rescan; 466 467 void *base_rb_stts; 468 dma_addr_t base_rb_stts_dma; 469 }; 470 471 static inline struct iwl_trans_pcie * 472 IWL_TRANS_GET_PCIE_TRANS(struct iwl_trans *trans) 473 { 474 return (void *)trans->trans_specific; 475 } 476 477 static inline void iwl_pcie_clear_irq(struct iwl_trans *trans, 478 struct msix_entry *entry) 479 { 480 /* 481 * Before sending the interrupt the HW disables it to prevent 482 * a nested interrupt. This is done by writing 1 to the corresponding 483 * bit in the mask register. After handling the interrupt, it should be 484 * re-enabled by clearing this bit. This register is defined as 485 * write 1 clear (W1C) register, meaning that it's being clear 486 * by writing 1 to the bit. 487 */ 488 iwl_write32(trans, CSR_MSIX_AUTOMASK_ST_AD, BIT(entry->entry)); 489 } 490 491 static inline struct iwl_trans * 492 iwl_trans_pcie_get_trans(struct iwl_trans_pcie *trans_pcie) 493 { 494 return container_of((void *)trans_pcie, struct iwl_trans, 495 trans_specific); 496 } 497 498 /* 499 * Convention: trans API functions: iwl_trans_pcie_XXX 500 * Other functions: iwl_pcie_XXX 501 */ 502 struct iwl_trans 503 *iwl_trans_pcie_alloc(struct pci_dev *pdev, 504 const struct pci_device_id *ent, 505 const struct iwl_cfg_trans_params *cfg_trans); 506 void iwl_trans_pcie_free(struct iwl_trans *trans); 507 508 /***************************************************** 509 * RX 510 ******************************************************/ 511 int iwl_pcie_rx_init(struct iwl_trans *trans); 512 int iwl_pcie_gen2_rx_init(struct iwl_trans *trans); 513 irqreturn_t iwl_pcie_msix_isr(int irq, void *data); 514 irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id); 515 irqreturn_t iwl_pcie_irq_msix_handler(int irq, void *dev_id); 516 irqreturn_t iwl_pcie_irq_rx_msix_handler(int irq, void *dev_id); 517 int iwl_pcie_rx_stop(struct iwl_trans *trans); 518 void iwl_pcie_rx_free(struct iwl_trans *trans); 519 void iwl_pcie_free_rbs_pool(struct iwl_trans *trans); 520 void iwl_pcie_rx_init_rxb_lists(struct iwl_rxq *rxq); 521 int iwl_pcie_dummy_napi_poll(struct napi_struct *napi, int budget); 522 void iwl_pcie_rxq_alloc_rbs(struct iwl_trans *trans, gfp_t priority, 523 struct iwl_rxq *rxq); 524 525 /***************************************************** 526 * ICT - interrupt handling 527 ******************************************************/ 528 irqreturn_t iwl_pcie_isr(int irq, void *data); 529 int iwl_pcie_alloc_ict(struct iwl_trans *trans); 530 void iwl_pcie_free_ict(struct iwl_trans *trans); 531 void iwl_pcie_reset_ict(struct iwl_trans *trans); 532 void iwl_pcie_disable_ict(struct iwl_trans *trans); 533 534 /***************************************************** 535 * TX / HCMD 536 ******************************************************/ 537 int iwl_pcie_tx_init(struct iwl_trans *trans); 538 void iwl_pcie_tx_start(struct iwl_trans *trans, u32 scd_base_addr); 539 int iwl_pcie_tx_stop(struct iwl_trans *trans); 540 void iwl_pcie_tx_free(struct iwl_trans *trans); 541 bool iwl_trans_pcie_txq_enable(struct iwl_trans *trans, int queue, u16 ssn, 542 const struct iwl_trans_txq_scd_cfg *cfg, 543 unsigned int wdg_timeout); 544 void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int queue, 545 bool configure_scd); 546 void iwl_trans_pcie_txq_set_shared_mode(struct iwl_trans *trans, u32 txq_id, 547 bool shared_mode); 548 int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, 549 struct iwl_device_tx_cmd *dev_cmd, int txq_id); 550 void iwl_pcie_txq_check_wrptrs(struct iwl_trans *trans); 551 int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd); 552 void iwl_pcie_hcmd_complete(struct iwl_trans *trans, 553 struct iwl_rx_cmd_buffer *rxb); 554 void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn, 555 struct sk_buff_head *skbs); 556 void iwl_trans_pcie_set_q_ptrs(struct iwl_trans *trans, int txq_id, int ptr); 557 void iwl_trans_pcie_tx_reset(struct iwl_trans *trans); 558 559 /***************************************************** 560 * Error handling 561 ******************************************************/ 562 void iwl_pcie_dump_csr(struct iwl_trans *trans); 563 564 /***************************************************** 565 * Helpers 566 ******************************************************/ 567 static inline void _iwl_disable_interrupts(struct iwl_trans *trans) 568 { 569 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 570 571 clear_bit(STATUS_INT_ENABLED, &trans->status); 572 if (!trans_pcie->msix_enabled) { 573 /* disable interrupts from uCode/NIC to host */ 574 iwl_write32(trans, CSR_INT_MASK, 0x00000000); 575 576 /* acknowledge/clear/reset any interrupts still pending 577 * from uCode or flow handler (Rx/Tx DMA) */ 578 iwl_write32(trans, CSR_INT, 0xffffffff); 579 iwl_write32(trans, CSR_FH_INT_STATUS, 0xffffffff); 580 } else { 581 /* disable all the interrupt we might use */ 582 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, 583 trans_pcie->fh_init_mask); 584 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD, 585 trans_pcie->hw_init_mask); 586 } 587 IWL_DEBUG_ISR(trans, "Disabled interrupts\n"); 588 } 589 590 #define IWL_NUM_OF_COMPLETION_RINGS 31 591 #define IWL_NUM_OF_TRANSFER_RINGS 527 592 593 static inline int iwl_pcie_get_num_sections(const struct fw_img *fw, 594 int start) 595 { 596 int i = 0; 597 598 while (start < fw->num_sec && 599 fw->sec[start].offset != CPU1_CPU2_SEPARATOR_SECTION && 600 fw->sec[start].offset != PAGING_SEPARATOR_SECTION) { 601 start++; 602 i++; 603 } 604 605 return i; 606 } 607 608 static inline void iwl_pcie_ctxt_info_free_fw_img(struct iwl_trans *trans) 609 { 610 struct iwl_self_init_dram *dram = &trans->init_dram; 611 int i; 612 613 if (!dram->fw) { 614 WARN_ON(dram->fw_cnt); 615 return; 616 } 617 618 for (i = 0; i < dram->fw_cnt; i++) 619 dma_free_coherent(trans->dev, dram->fw[i].size, 620 dram->fw[i].block, dram->fw[i].physical); 621 622 kfree(dram->fw); 623 dram->fw_cnt = 0; 624 dram->fw = NULL; 625 } 626 627 static inline void iwl_disable_interrupts(struct iwl_trans *trans) 628 { 629 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 630 631 spin_lock(&trans_pcie->irq_lock); 632 _iwl_disable_interrupts(trans); 633 spin_unlock(&trans_pcie->irq_lock); 634 } 635 636 static inline void _iwl_enable_interrupts(struct iwl_trans *trans) 637 { 638 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 639 640 IWL_DEBUG_ISR(trans, "Enabling interrupts\n"); 641 set_bit(STATUS_INT_ENABLED, &trans->status); 642 if (!trans_pcie->msix_enabled) { 643 trans_pcie->inta_mask = CSR_INI_SET_MASK; 644 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask); 645 } else { 646 /* 647 * fh/hw_mask keeps all the unmasked causes. 648 * Unlike msi, in msix cause is enabled when it is unset. 649 */ 650 trans_pcie->hw_mask = trans_pcie->hw_init_mask; 651 trans_pcie->fh_mask = trans_pcie->fh_init_mask; 652 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, 653 ~trans_pcie->fh_mask); 654 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD, 655 ~trans_pcie->hw_mask); 656 } 657 } 658 659 static inline void iwl_enable_interrupts(struct iwl_trans *trans) 660 { 661 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 662 663 spin_lock(&trans_pcie->irq_lock); 664 _iwl_enable_interrupts(trans); 665 spin_unlock(&trans_pcie->irq_lock); 666 } 667 static inline void iwl_enable_hw_int_msk_msix(struct iwl_trans *trans, u32 msk) 668 { 669 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 670 671 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD, ~msk); 672 trans_pcie->hw_mask = msk; 673 } 674 675 static inline void iwl_enable_fh_int_msk_msix(struct iwl_trans *trans, u32 msk) 676 { 677 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 678 679 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~msk); 680 trans_pcie->fh_mask = msk; 681 } 682 683 static inline void iwl_enable_fw_load_int(struct iwl_trans *trans) 684 { 685 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 686 687 IWL_DEBUG_ISR(trans, "Enabling FW load interrupt\n"); 688 if (!trans_pcie->msix_enabled) { 689 trans_pcie->inta_mask = CSR_INT_BIT_FH_TX; 690 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask); 691 } else { 692 iwl_write32(trans, CSR_MSIX_HW_INT_MASK_AD, 693 trans_pcie->hw_init_mask); 694 iwl_enable_fh_int_msk_msix(trans, 695 MSIX_FH_INT_CAUSES_D2S_CH0_NUM); 696 } 697 } 698 699 static inline void iwl_enable_fw_load_int_ctx_info(struct iwl_trans *trans) 700 { 701 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 702 703 IWL_DEBUG_ISR(trans, "Enabling ALIVE interrupt only\n"); 704 705 if (!trans_pcie->msix_enabled) { 706 /* 707 * When we'll receive the ALIVE interrupt, the ISR will call 708 * iwl_enable_fw_load_int_ctx_info again to set the ALIVE 709 * interrupt (which is not really needed anymore) but also the 710 * RX interrupt which will allow us to receive the ALIVE 711 * notification (which is Rx) and continue the flow. 712 */ 713 trans_pcie->inta_mask = CSR_INT_BIT_ALIVE | CSR_INT_BIT_FH_RX; 714 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask); 715 } else { 716 iwl_enable_hw_int_msk_msix(trans, 717 MSIX_HW_INT_CAUSES_REG_ALIVE); 718 /* 719 * Leave all the FH causes enabled to get the ALIVE 720 * notification. 721 */ 722 iwl_enable_fh_int_msk_msix(trans, trans_pcie->fh_init_mask); 723 } 724 } 725 726 static inline const char *queue_name(struct device *dev, 727 struct iwl_trans_pcie *trans_p, int i) 728 { 729 if (trans_p->shared_vec_mask) { 730 int vec = trans_p->shared_vec_mask & 731 IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0; 732 733 if (i == 0) 734 return DRV_NAME ": shared IRQ"; 735 736 return devm_kasprintf(dev, GFP_KERNEL, 737 DRV_NAME ": queue %d", i + vec); 738 } 739 if (i == 0) 740 return DRV_NAME ": default queue"; 741 742 if (i == trans_p->alloc_vecs - 1) 743 return DRV_NAME ": exception"; 744 745 return devm_kasprintf(dev, GFP_KERNEL, 746 DRV_NAME ": queue %d", i); 747 } 748 749 static inline void iwl_enable_rfkill_int(struct iwl_trans *trans) 750 { 751 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 752 753 IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n"); 754 if (!trans_pcie->msix_enabled) { 755 trans_pcie->inta_mask = CSR_INT_BIT_RF_KILL; 756 iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask); 757 } else { 758 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, 759 trans_pcie->fh_init_mask); 760 iwl_enable_hw_int_msk_msix(trans, 761 MSIX_HW_INT_CAUSES_REG_RF_KILL); 762 } 763 764 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_9000) { 765 /* 766 * On 9000-series devices this bit isn't enabled by default, so 767 * when we power down the device we need set the bit to allow it 768 * to wake up the PCI-E bus for RF-kill interrupts. 769 */ 770 iwl_set_bit(trans, CSR_GP_CNTRL, 771 CSR_GP_CNTRL_REG_FLAG_RFKILL_WAKE_L1A_EN); 772 } 773 } 774 775 void iwl_pcie_handle_rfkill_irq(struct iwl_trans *trans); 776 777 static inline bool iwl_is_rfkill_set(struct iwl_trans *trans) 778 { 779 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 780 781 lockdep_assert_held(&trans_pcie->mutex); 782 783 if (trans_pcie->debug_rfkill == 1) 784 return true; 785 786 return !(iwl_read32(trans, CSR_GP_CNTRL) & 787 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW); 788 } 789 790 static inline void __iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, 791 u32 reg, u32 mask, u32 value) 792 { 793 u32 v; 794 795 #ifdef CONFIG_IWLWIFI_DEBUG 796 WARN_ON_ONCE(value & ~mask); 797 #endif 798 799 v = iwl_read32(trans, reg); 800 v &= ~mask; 801 v |= value; 802 iwl_write32(trans, reg, v); 803 } 804 805 static inline void __iwl_trans_pcie_clear_bit(struct iwl_trans *trans, 806 u32 reg, u32 mask) 807 { 808 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, 0); 809 } 810 811 static inline void __iwl_trans_pcie_set_bit(struct iwl_trans *trans, 812 u32 reg, u32 mask) 813 { 814 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, mask); 815 } 816 817 static inline bool iwl_pcie_dbg_on(struct iwl_trans *trans) 818 { 819 return (trans->dbg.dest_tlv || iwl_trans_dbg_ini_valid(trans)); 820 } 821 822 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state); 823 void iwl_trans_pcie_dump_regs(struct iwl_trans *trans); 824 void iwl_trans_pcie_sync_nmi(struct iwl_trans *trans); 825 826 #ifdef CONFIG_IWLWIFI_DEBUGFS 827 void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans); 828 #else 829 static inline void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans) { } 830 #endif 831 832 void iwl_pcie_rx_allocator_work(struct work_struct *data); 833 834 /* common functions that are used by gen2 transport */ 835 int iwl_pcie_gen2_apm_init(struct iwl_trans *trans); 836 void iwl_pcie_apm_config(struct iwl_trans *trans); 837 int iwl_pcie_prepare_card_hw(struct iwl_trans *trans); 838 void iwl_pcie_synchronize_irqs(struct iwl_trans *trans); 839 bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans); 840 void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans, 841 bool was_in_rfkill); 842 void iwl_pcie_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq); 843 void iwl_pcie_apm_stop_master(struct iwl_trans *trans); 844 void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie); 845 int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans, 846 struct iwl_dma_ptr *ptr, size_t size); 847 void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr); 848 void iwl_pcie_apply_destination(struct iwl_trans *trans); 849 850 /* common functions that are used by gen3 transport */ 851 void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power); 852 853 /* transport gen 2 exported functions */ 854 int iwl_trans_pcie_gen2_start_fw(struct iwl_trans *trans, 855 const struct fw_img *fw, bool run_in_rfkill); 856 void iwl_trans_pcie_gen2_fw_alive(struct iwl_trans *trans, u32 scd_addr); 857 int iwl_trans_pcie_gen2_send_hcmd(struct iwl_trans *trans, 858 struct iwl_host_cmd *cmd); 859 void iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans); 860 void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans); 861 void iwl_pcie_d3_complete_suspend(struct iwl_trans *trans, 862 bool test, bool reset); 863 #endif /* __iwl_trans_int_pcie_h__ */ 864