1 /* 2 * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/interrupt.h> 18 19 #include "wil6210.h" 20 #include "trace.h" 21 22 /** 23 * Theory of operation: 24 * 25 * There is ISR pseudo-cause register, 26 * dma_rgf->DMA_RGF.PSEUDO_CAUSE.PSEUDO_CAUSE 27 * Its bits represents OR'ed bits from 3 real ISR registers: 28 * TX, RX, and MISC. 29 * 30 * Registers may be configured to either "write 1 to clear" or 31 * "clear on read" mode 32 * 33 * When handling interrupt, one have to mask/unmask interrupts for the 34 * real ISR registers, or hardware may malfunction. 35 * 36 */ 37 38 #define WIL6210_IRQ_DISABLE (0xFFFFFFFFUL) 39 #define WIL6210_IRQ_DISABLE_NO_HALP (0xF7FFFFFFUL) 40 #define WIL6210_IMC_RX (BIT_DMA_EP_RX_ICR_RX_DONE | \ 41 BIT_DMA_EP_RX_ICR_RX_HTRSH) 42 #define WIL6210_IMC_RX_NO_RX_HTRSH (WIL6210_IMC_RX & \ 43 (~(BIT_DMA_EP_RX_ICR_RX_HTRSH))) 44 #define WIL6210_IMC_TX (BIT_DMA_EP_TX_ICR_TX_DONE | \ 45 BIT_DMA_EP_TX_ICR_TX_DONE_N(0)) 46 #define WIL6210_IMC_MISC_NO_HALP (ISR_MISC_FW_READY | \ 47 ISR_MISC_MBOX_EVT | \ 48 ISR_MISC_FW_ERROR) 49 #define WIL6210_IMC_MISC (WIL6210_IMC_MISC_NO_HALP | \ 50 BIT_DMA_EP_MISC_ICR_HALP) 51 #define WIL6210_IRQ_PSEUDO_MASK (u32)(~(BIT_DMA_PSEUDO_CAUSE_RX | \ 52 BIT_DMA_PSEUDO_CAUSE_TX | \ 53 BIT_DMA_PSEUDO_CAUSE_MISC)) 54 55 #if defined(CONFIG_WIL6210_ISR_COR) 56 /* configure to Clear-On-Read mode */ 57 #define WIL_ICR_ICC_VALUE (0xFFFFFFFFUL) 58 #define WIL_ICR_ICC_MISC_VALUE (0xF7FFFFFFUL) 59 60 static inline void wil_icr_clear(u32 x, void __iomem *addr) 61 { 62 } 63 #else /* defined(CONFIG_WIL6210_ISR_COR) */ 64 /* configure to Write-1-to-Clear mode */ 65 #define WIL_ICR_ICC_VALUE (0UL) 66 #define WIL_ICR_ICC_MISC_VALUE (0UL) 67 68 static inline void wil_icr_clear(u32 x, void __iomem *addr) 69 { 70 writel(x, addr); 71 } 72 #endif /* defined(CONFIG_WIL6210_ISR_COR) */ 73 74 static inline u32 wil_ioread32_and_clear(void __iomem *addr) 75 { 76 u32 x = readl(addr); 77 78 wil_icr_clear(x, addr); 79 80 return x; 81 } 82 83 static void wil6210_mask_irq_tx(struct wil6210_priv *wil) 84 { 85 wil_w(wil, RGF_DMA_EP_TX_ICR + offsetof(struct RGF_ICR, IMS), 86 WIL6210_IRQ_DISABLE); 87 } 88 89 static void wil6210_mask_irq_rx(struct wil6210_priv *wil) 90 { 91 wil_w(wil, RGF_DMA_EP_RX_ICR + offsetof(struct RGF_ICR, IMS), 92 WIL6210_IRQ_DISABLE); 93 } 94 95 static void wil6210_mask_irq_misc(struct wil6210_priv *wil, bool mask_halp) 96 { 97 wil_dbg_irq(wil, "mask_irq_misc: mask_halp(%s)\n", 98 mask_halp ? "true" : "false"); 99 100 wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMS), 101 mask_halp ? WIL6210_IRQ_DISABLE : WIL6210_IRQ_DISABLE_NO_HALP); 102 } 103 104 void wil6210_mask_halp(struct wil6210_priv *wil) 105 { 106 wil_dbg_irq(wil, "mask_halp\n"); 107 108 wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMS), 109 BIT_DMA_EP_MISC_ICR_HALP); 110 } 111 112 static void wil6210_mask_irq_pseudo(struct wil6210_priv *wil) 113 { 114 wil_dbg_irq(wil, "mask_irq_pseudo\n"); 115 116 wil_w(wil, RGF_DMA_PSEUDO_CAUSE_MASK_SW, WIL6210_IRQ_DISABLE); 117 118 clear_bit(wil_status_irqen, wil->status); 119 } 120 121 void wil6210_unmask_irq_tx(struct wil6210_priv *wil) 122 { 123 wil_w(wil, RGF_DMA_EP_TX_ICR + offsetof(struct RGF_ICR, IMC), 124 WIL6210_IMC_TX); 125 } 126 127 void wil6210_unmask_irq_rx(struct wil6210_priv *wil) 128 { 129 bool unmask_rx_htrsh = test_bit(wil_status_fwconnected, wil->status); 130 131 wil_w(wil, RGF_DMA_EP_RX_ICR + offsetof(struct RGF_ICR, IMC), 132 unmask_rx_htrsh ? WIL6210_IMC_RX : WIL6210_IMC_RX_NO_RX_HTRSH); 133 } 134 135 static void wil6210_unmask_irq_misc(struct wil6210_priv *wil, bool unmask_halp) 136 { 137 wil_dbg_irq(wil, "unmask_irq_misc: unmask_halp(%s)\n", 138 unmask_halp ? "true" : "false"); 139 140 wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMC), 141 unmask_halp ? WIL6210_IMC_MISC : WIL6210_IMC_MISC_NO_HALP); 142 } 143 144 static void wil6210_unmask_halp(struct wil6210_priv *wil) 145 { 146 wil_dbg_irq(wil, "unmask_halp\n"); 147 148 wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMC), 149 BIT_DMA_EP_MISC_ICR_HALP); 150 } 151 152 static void wil6210_unmask_irq_pseudo(struct wil6210_priv *wil) 153 { 154 wil_dbg_irq(wil, "unmask_irq_pseudo\n"); 155 156 set_bit(wil_status_irqen, wil->status); 157 158 wil_w(wil, RGF_DMA_PSEUDO_CAUSE_MASK_SW, WIL6210_IRQ_PSEUDO_MASK); 159 } 160 161 void wil_mask_irq(struct wil6210_priv *wil) 162 { 163 wil_dbg_irq(wil, "mask_irq\n"); 164 165 wil6210_mask_irq_tx(wil); 166 wil6210_mask_irq_rx(wil); 167 wil6210_mask_irq_misc(wil, true); 168 wil6210_mask_irq_pseudo(wil); 169 } 170 171 void wil_unmask_irq(struct wil6210_priv *wil) 172 { 173 wil_dbg_irq(wil, "unmask_irq\n"); 174 175 wil_w(wil, RGF_DMA_EP_RX_ICR + offsetof(struct RGF_ICR, ICC), 176 WIL_ICR_ICC_VALUE); 177 wil_w(wil, RGF_DMA_EP_TX_ICR + offsetof(struct RGF_ICR, ICC), 178 WIL_ICR_ICC_VALUE); 179 wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, ICC), 180 WIL_ICR_ICC_MISC_VALUE); 181 182 wil6210_unmask_irq_pseudo(wil); 183 wil6210_unmask_irq_tx(wil); 184 wil6210_unmask_irq_rx(wil); 185 wil6210_unmask_irq_misc(wil, true); 186 } 187 188 void wil_configure_interrupt_moderation(struct wil6210_priv *wil) 189 { 190 wil_dbg_irq(wil, "configure_interrupt_moderation\n"); 191 192 /* disable interrupt moderation for monitor 193 * to get better timestamp precision 194 */ 195 if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) 196 return; 197 198 /* Disable and clear tx counter before (re)configuration */ 199 wil_w(wil, RGF_DMA_ITR_TX_CNT_CTL, BIT_DMA_ITR_TX_CNT_CTL_CLR); 200 wil_w(wil, RGF_DMA_ITR_TX_CNT_TRSH, wil->tx_max_burst_duration); 201 wil_info(wil, "set ITR_TX_CNT_TRSH = %d usec\n", 202 wil->tx_max_burst_duration); 203 /* Configure TX max burst duration timer to use usec units */ 204 wil_w(wil, RGF_DMA_ITR_TX_CNT_CTL, 205 BIT_DMA_ITR_TX_CNT_CTL_EN | BIT_DMA_ITR_TX_CNT_CTL_EXT_TIC_SEL); 206 207 /* Disable and clear tx idle counter before (re)configuration */ 208 wil_w(wil, RGF_DMA_ITR_TX_IDL_CNT_CTL, BIT_DMA_ITR_TX_IDL_CNT_CTL_CLR); 209 wil_w(wil, RGF_DMA_ITR_TX_IDL_CNT_TRSH, wil->tx_interframe_timeout); 210 wil_info(wil, "set ITR_TX_IDL_CNT_TRSH = %d usec\n", 211 wil->tx_interframe_timeout); 212 /* Configure TX max burst duration timer to use usec units */ 213 wil_w(wil, RGF_DMA_ITR_TX_IDL_CNT_CTL, BIT_DMA_ITR_TX_IDL_CNT_CTL_EN | 214 BIT_DMA_ITR_TX_IDL_CNT_CTL_EXT_TIC_SEL); 215 216 /* Disable and clear rx counter before (re)configuration */ 217 wil_w(wil, RGF_DMA_ITR_RX_CNT_CTL, BIT_DMA_ITR_RX_CNT_CTL_CLR); 218 wil_w(wil, RGF_DMA_ITR_RX_CNT_TRSH, wil->rx_max_burst_duration); 219 wil_info(wil, "set ITR_RX_CNT_TRSH = %d usec\n", 220 wil->rx_max_burst_duration); 221 /* Configure TX max burst duration timer to use usec units */ 222 wil_w(wil, RGF_DMA_ITR_RX_CNT_CTL, 223 BIT_DMA_ITR_RX_CNT_CTL_EN | BIT_DMA_ITR_RX_CNT_CTL_EXT_TIC_SEL); 224 225 /* Disable and clear rx idle counter before (re)configuration */ 226 wil_w(wil, RGF_DMA_ITR_RX_IDL_CNT_CTL, BIT_DMA_ITR_RX_IDL_CNT_CTL_CLR); 227 wil_w(wil, RGF_DMA_ITR_RX_IDL_CNT_TRSH, wil->rx_interframe_timeout); 228 wil_info(wil, "set ITR_RX_IDL_CNT_TRSH = %d usec\n", 229 wil->rx_interframe_timeout); 230 /* Configure TX max burst duration timer to use usec units */ 231 wil_w(wil, RGF_DMA_ITR_RX_IDL_CNT_CTL, BIT_DMA_ITR_RX_IDL_CNT_CTL_EN | 232 BIT_DMA_ITR_RX_IDL_CNT_CTL_EXT_TIC_SEL); 233 } 234 235 static irqreturn_t wil6210_irq_rx(int irq, void *cookie) 236 { 237 struct wil6210_priv *wil = cookie; 238 u32 isr = wil_ioread32_and_clear(wil->csr + 239 HOSTADDR(RGF_DMA_EP_RX_ICR) + 240 offsetof(struct RGF_ICR, ICR)); 241 bool need_unmask = true; 242 243 trace_wil6210_irq_rx(isr); 244 wil_dbg_irq(wil, "ISR RX 0x%08x\n", isr); 245 246 if (unlikely(!isr)) { 247 wil_err_ratelimited(wil, "spurious IRQ: RX\n"); 248 return IRQ_NONE; 249 } 250 251 wil6210_mask_irq_rx(wil); 252 253 /* RX_DONE and RX_HTRSH interrupts are the same if interrupt 254 * moderation is not used. Interrupt moderation may cause RX 255 * buffer overflow while RX_DONE is delayed. The required 256 * action is always the same - should empty the accumulated 257 * packets from the RX ring. 258 */ 259 if (likely(isr & (BIT_DMA_EP_RX_ICR_RX_DONE | 260 BIT_DMA_EP_RX_ICR_RX_HTRSH))) { 261 wil_dbg_irq(wil, "RX done / RX_HTRSH received, ISR (0x%x)\n", 262 isr); 263 264 isr &= ~(BIT_DMA_EP_RX_ICR_RX_DONE | 265 BIT_DMA_EP_RX_ICR_RX_HTRSH); 266 if (likely(test_bit(wil_status_fwready, wil->status))) { 267 if (likely(test_bit(wil_status_napi_en, wil->status))) { 268 wil_dbg_txrx(wil, "NAPI(Rx) schedule\n"); 269 need_unmask = false; 270 napi_schedule(&wil->napi_rx); 271 } else { 272 wil_err_ratelimited( 273 wil, 274 "Got Rx interrupt while stopping interface\n"); 275 } 276 } else { 277 wil_err_ratelimited(wil, "Got Rx interrupt while in reset\n"); 278 } 279 } 280 281 if (unlikely(isr)) 282 wil_err(wil, "un-handled RX ISR bits 0x%08x\n", isr); 283 284 /* Rx IRQ will be enabled when NAPI processing finished */ 285 286 atomic_inc(&wil->isr_count_rx); 287 288 if (unlikely(need_unmask)) 289 wil6210_unmask_irq_rx(wil); 290 291 return IRQ_HANDLED; 292 } 293 294 static irqreturn_t wil6210_irq_tx(int irq, void *cookie) 295 { 296 struct wil6210_priv *wil = cookie; 297 u32 isr = wil_ioread32_and_clear(wil->csr + 298 HOSTADDR(RGF_DMA_EP_TX_ICR) + 299 offsetof(struct RGF_ICR, ICR)); 300 bool need_unmask = true; 301 302 trace_wil6210_irq_tx(isr); 303 wil_dbg_irq(wil, "ISR TX 0x%08x\n", isr); 304 305 if (unlikely(!isr)) { 306 wil_err_ratelimited(wil, "spurious IRQ: TX\n"); 307 return IRQ_NONE; 308 } 309 310 wil6210_mask_irq_tx(wil); 311 312 if (likely(isr & BIT_DMA_EP_TX_ICR_TX_DONE)) { 313 wil_dbg_irq(wil, "TX done\n"); 314 isr &= ~BIT_DMA_EP_TX_ICR_TX_DONE; 315 /* clear also all VRING interrupts */ 316 isr &= ~(BIT(25) - 1UL); 317 if (likely(test_bit(wil_status_fwready, wil->status))) { 318 wil_dbg_txrx(wil, "NAPI(Tx) schedule\n"); 319 need_unmask = false; 320 napi_schedule(&wil->napi_tx); 321 } else { 322 wil_err_ratelimited(wil, "Got Tx interrupt while in reset\n"); 323 } 324 } 325 326 if (unlikely(isr)) 327 wil_err_ratelimited(wil, "un-handled TX ISR bits 0x%08x\n", 328 isr); 329 330 /* Tx IRQ will be enabled when NAPI processing finished */ 331 332 atomic_inc(&wil->isr_count_tx); 333 334 if (unlikely(need_unmask)) 335 wil6210_unmask_irq_tx(wil); 336 337 return IRQ_HANDLED; 338 } 339 340 static void wil_notify_fw_error(struct wil6210_priv *wil) 341 { 342 struct device *dev = &wil_to_ndev(wil)->dev; 343 char *envp[3] = { 344 [0] = "SOURCE=wil6210", 345 [1] = "EVENT=FW_ERROR", 346 [2] = NULL, 347 }; 348 wil_err(wil, "Notify about firmware error\n"); 349 kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 350 } 351 352 static void wil_cache_mbox_regs(struct wil6210_priv *wil) 353 { 354 /* make shadow copy of registers that should not change on run time */ 355 wil_memcpy_fromio_32(&wil->mbox_ctl, wil->csr + HOST_MBOX, 356 sizeof(struct wil6210_mbox_ctl)); 357 wil_mbox_ring_le2cpus(&wil->mbox_ctl.rx); 358 wil_mbox_ring_le2cpus(&wil->mbox_ctl.tx); 359 } 360 361 static bool wil_validate_mbox_regs(struct wil6210_priv *wil) 362 { 363 size_t min_size = sizeof(struct wil6210_mbox_hdr) + 364 sizeof(struct wmi_cmd_hdr); 365 366 if (wil->mbox_ctl.rx.entry_size < min_size) { 367 wil_err(wil, "rx mbox entry too small (%d)\n", 368 wil->mbox_ctl.rx.entry_size); 369 return false; 370 } 371 if (wil->mbox_ctl.tx.entry_size < min_size) { 372 wil_err(wil, "tx mbox entry too small (%d)\n", 373 wil->mbox_ctl.tx.entry_size); 374 return false; 375 } 376 377 return true; 378 } 379 380 static irqreturn_t wil6210_irq_misc(int irq, void *cookie) 381 { 382 struct wil6210_priv *wil = cookie; 383 u32 isr = wil_ioread32_and_clear(wil->csr + 384 HOSTADDR(RGF_DMA_EP_MISC_ICR) + 385 offsetof(struct RGF_ICR, ICR)); 386 387 trace_wil6210_irq_misc(isr); 388 wil_dbg_irq(wil, "ISR MISC 0x%08x\n", isr); 389 390 if (!isr) { 391 wil_err(wil, "spurious IRQ: MISC\n"); 392 return IRQ_NONE; 393 } 394 395 wil6210_mask_irq_misc(wil, false); 396 397 if (isr & ISR_MISC_FW_ERROR) { 398 u32 fw_assert_code = wil_r(wil, RGF_FW_ASSERT_CODE); 399 u32 ucode_assert_code = wil_r(wil, RGF_UCODE_ASSERT_CODE); 400 401 wil_err(wil, 402 "Firmware error detected, assert codes FW 0x%08x, UCODE 0x%08x\n", 403 fw_assert_code, ucode_assert_code); 404 clear_bit(wil_status_fwready, wil->status); 405 /* 406 * do not clear @isr here - we do 2-nd part in thread 407 * there, user space get notified, and it should be done 408 * in non-atomic context 409 */ 410 } 411 412 if (isr & ISR_MISC_FW_READY) { 413 wil_dbg_irq(wil, "IRQ: FW ready\n"); 414 wil_cache_mbox_regs(wil); 415 if (wil_validate_mbox_regs(wil)) 416 set_bit(wil_status_mbox_ready, wil->status); 417 /** 418 * Actual FW ready indicated by the 419 * WMI_FW_READY_EVENTID 420 */ 421 isr &= ~ISR_MISC_FW_READY; 422 } 423 424 if (isr & BIT_DMA_EP_MISC_ICR_HALP) { 425 wil_dbg_irq(wil, "irq_misc: HALP IRQ invoked\n"); 426 wil6210_mask_halp(wil); 427 isr &= ~BIT_DMA_EP_MISC_ICR_HALP; 428 complete(&wil->halp.comp); 429 } 430 431 wil->isr_misc = isr; 432 433 if (isr) { 434 return IRQ_WAKE_THREAD; 435 } else { 436 wil6210_unmask_irq_misc(wil, false); 437 return IRQ_HANDLED; 438 } 439 } 440 441 static irqreturn_t wil6210_irq_misc_thread(int irq, void *cookie) 442 { 443 struct wil6210_priv *wil = cookie; 444 u32 isr = wil->isr_misc; 445 446 trace_wil6210_irq_misc_thread(isr); 447 wil_dbg_irq(wil, "Thread ISR MISC 0x%08x\n", isr); 448 449 if (isr & ISR_MISC_FW_ERROR) { 450 wil->recovery_state = fw_recovery_pending; 451 wil_fw_core_dump(wil); 452 wil_notify_fw_error(wil); 453 isr &= ~ISR_MISC_FW_ERROR; 454 if (wil->platform_ops.notify) { 455 wil_err(wil, "notify platform driver about FW crash"); 456 wil->platform_ops.notify(wil->platform_handle, 457 WIL_PLATFORM_EVT_FW_CRASH); 458 } else { 459 wil_fw_error_recovery(wil); 460 } 461 } 462 if (isr & ISR_MISC_MBOX_EVT) { 463 wil_dbg_irq(wil, "MBOX event\n"); 464 wmi_recv_cmd(wil); 465 isr &= ~ISR_MISC_MBOX_EVT; 466 } 467 468 if (isr) 469 wil_dbg_irq(wil, "un-handled MISC ISR bits 0x%08x\n", isr); 470 471 wil->isr_misc = 0; 472 473 wil6210_unmask_irq_misc(wil, false); 474 475 return IRQ_HANDLED; 476 } 477 478 /** 479 * thread IRQ handler 480 */ 481 static irqreturn_t wil6210_thread_irq(int irq, void *cookie) 482 { 483 struct wil6210_priv *wil = cookie; 484 485 wil_dbg_irq(wil, "Thread IRQ\n"); 486 /* Discover real IRQ cause */ 487 if (wil->isr_misc) 488 wil6210_irq_misc_thread(irq, cookie); 489 490 wil6210_unmask_irq_pseudo(wil); 491 492 if (wil->suspend_resp_rcvd) { 493 wil_dbg_irq(wil, "set suspend_resp_comp to true\n"); 494 wil->suspend_resp_comp = true; 495 wake_up_interruptible(&wil->wq); 496 } 497 498 return IRQ_HANDLED; 499 } 500 501 /* DEBUG 502 * There is subtle bug in hardware that causes IRQ to raise when it should be 503 * masked. It is quite rare and hard to debug. 504 * 505 * Catch irq issue if it happens and print all I can. 506 */ 507 static int wil6210_debug_irq_mask(struct wil6210_priv *wil, u32 pseudo_cause) 508 { 509 if (!test_bit(wil_status_irqen, wil->status)) { 510 u32 icm_rx = wil_ioread32_and_clear(wil->csr + 511 HOSTADDR(RGF_DMA_EP_RX_ICR) + 512 offsetof(struct RGF_ICR, ICM)); 513 u32 icr_rx = wil_ioread32_and_clear(wil->csr + 514 HOSTADDR(RGF_DMA_EP_RX_ICR) + 515 offsetof(struct RGF_ICR, ICR)); 516 u32 imv_rx = wil_r(wil, RGF_DMA_EP_RX_ICR + 517 offsetof(struct RGF_ICR, IMV)); 518 u32 icm_tx = wil_ioread32_and_clear(wil->csr + 519 HOSTADDR(RGF_DMA_EP_TX_ICR) + 520 offsetof(struct RGF_ICR, ICM)); 521 u32 icr_tx = wil_ioread32_and_clear(wil->csr + 522 HOSTADDR(RGF_DMA_EP_TX_ICR) + 523 offsetof(struct RGF_ICR, ICR)); 524 u32 imv_tx = wil_r(wil, RGF_DMA_EP_TX_ICR + 525 offsetof(struct RGF_ICR, IMV)); 526 u32 icm_misc = wil_ioread32_and_clear(wil->csr + 527 HOSTADDR(RGF_DMA_EP_MISC_ICR) + 528 offsetof(struct RGF_ICR, ICM)); 529 u32 icr_misc = wil_ioread32_and_clear(wil->csr + 530 HOSTADDR(RGF_DMA_EP_MISC_ICR) + 531 offsetof(struct RGF_ICR, ICR)); 532 u32 imv_misc = wil_r(wil, RGF_DMA_EP_MISC_ICR + 533 offsetof(struct RGF_ICR, IMV)); 534 535 /* HALP interrupt can be unmasked when misc interrupts are 536 * masked 537 */ 538 if (icr_misc & BIT_DMA_EP_MISC_ICR_HALP) 539 return 0; 540 541 wil_err(wil, "IRQ when it should be masked: pseudo 0x%08x\n" 542 "Rx icm:icr:imv 0x%08x 0x%08x 0x%08x\n" 543 "Tx icm:icr:imv 0x%08x 0x%08x 0x%08x\n" 544 "Misc icm:icr:imv 0x%08x 0x%08x 0x%08x\n", 545 pseudo_cause, 546 icm_rx, icr_rx, imv_rx, 547 icm_tx, icr_tx, imv_tx, 548 icm_misc, icr_misc, imv_misc); 549 550 return -EINVAL; 551 } 552 553 return 0; 554 } 555 556 static irqreturn_t wil6210_hardirq(int irq, void *cookie) 557 { 558 irqreturn_t rc = IRQ_HANDLED; 559 struct wil6210_priv *wil = cookie; 560 u32 pseudo_cause = wil_r(wil, RGF_DMA_PSEUDO_CAUSE); 561 562 /** 563 * pseudo_cause is Clear-On-Read, no need to ACK 564 */ 565 if (unlikely((pseudo_cause == 0) || ((pseudo_cause & 0xff) == 0xff))) 566 return IRQ_NONE; 567 568 /* FIXME: IRQ mask debug */ 569 if (unlikely(wil6210_debug_irq_mask(wil, pseudo_cause))) 570 return IRQ_NONE; 571 572 trace_wil6210_irq_pseudo(pseudo_cause); 573 wil_dbg_irq(wil, "Pseudo IRQ 0x%08x\n", pseudo_cause); 574 575 wil6210_mask_irq_pseudo(wil); 576 577 /* Discover real IRQ cause 578 * There are 2 possible phases for every IRQ: 579 * - hard IRQ handler called right here 580 * - threaded handler called later 581 * 582 * Hard IRQ handler reads and clears ISR. 583 * 584 * If threaded handler requested, hard IRQ handler 585 * returns IRQ_WAKE_THREAD and saves ISR register value 586 * for the threaded handler use. 587 * 588 * voting for wake thread - need at least 1 vote 589 */ 590 if ((pseudo_cause & BIT_DMA_PSEUDO_CAUSE_RX) && 591 (wil6210_irq_rx(irq, cookie) == IRQ_WAKE_THREAD)) 592 rc = IRQ_WAKE_THREAD; 593 594 if ((pseudo_cause & BIT_DMA_PSEUDO_CAUSE_TX) && 595 (wil6210_irq_tx(irq, cookie) == IRQ_WAKE_THREAD)) 596 rc = IRQ_WAKE_THREAD; 597 598 if ((pseudo_cause & BIT_DMA_PSEUDO_CAUSE_MISC) && 599 (wil6210_irq_misc(irq, cookie) == IRQ_WAKE_THREAD)) 600 rc = IRQ_WAKE_THREAD; 601 602 /* if thread is requested, it will unmask IRQ */ 603 if (rc != IRQ_WAKE_THREAD) 604 wil6210_unmask_irq_pseudo(wil); 605 606 return rc; 607 } 608 609 /* can't use wil_ioread32_and_clear because ICC value is not set yet */ 610 static inline void wil_clear32(void __iomem *addr) 611 { 612 u32 x = readl(addr); 613 614 writel(x, addr); 615 } 616 617 void wil6210_clear_irq(struct wil6210_priv *wil) 618 { 619 wil_clear32(wil->csr + HOSTADDR(RGF_DMA_EP_RX_ICR) + 620 offsetof(struct RGF_ICR, ICR)); 621 wil_clear32(wil->csr + HOSTADDR(RGF_DMA_EP_TX_ICR) + 622 offsetof(struct RGF_ICR, ICR)); 623 wil_clear32(wil->csr + HOSTADDR(RGF_DMA_EP_MISC_ICR) + 624 offsetof(struct RGF_ICR, ICR)); 625 wmb(); /* make sure write completed */ 626 } 627 628 void wil6210_set_halp(struct wil6210_priv *wil) 629 { 630 wil_dbg_irq(wil, "set_halp\n"); 631 632 wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, ICS), 633 BIT_DMA_EP_MISC_ICR_HALP); 634 } 635 636 void wil6210_clear_halp(struct wil6210_priv *wil) 637 { 638 wil_dbg_irq(wil, "clear_halp\n"); 639 640 wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, ICR), 641 BIT_DMA_EP_MISC_ICR_HALP); 642 wil6210_unmask_halp(wil); 643 } 644 645 int wil6210_init_irq(struct wil6210_priv *wil, int irq, bool use_msi) 646 { 647 int rc; 648 649 wil_dbg_misc(wil, "init_irq: %s\n", use_msi ? "MSI" : "INTx"); 650 651 rc = request_threaded_irq(irq, wil6210_hardirq, 652 wil6210_thread_irq, 653 use_msi ? 0 : IRQF_SHARED, 654 WIL_NAME, wil); 655 return rc; 656 } 657 658 void wil6210_fini_irq(struct wil6210_priv *wil, int irq) 659 { 660 wil_dbg_misc(wil, "fini_irq:\n"); 661 662 wil_mask_irq(wil); 663 free_irq(irq, wil); 664 } 665