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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 | /* SPDX-License-Identifier: GPL-2.0 */ // Copyright (c) 2017 Cadence // Cadence PCIe controller driver. // Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> #ifndef _PCIE_CADENCE_H #define _PCIE_CADENCE_H #include <linux/kernel.h> #include <linux/pci.h> #include <linux/pci-epf.h> #include <linux/phy/phy.h> /* Parameters for the waiting for link up routine */ #define LINK_WAIT_MAX_RETRIES 10 #define LINK_WAIT_USLEEP_MIN 90000 #define LINK_WAIT_USLEEP_MAX 100000 /* * Local Management Registers */ #define CDNS_PCIE_LM_BASE 0x00100000 /* Vendor ID Register */ #define CDNS_PCIE_LM_ID (CDNS_PCIE_LM_BASE + 0x0044) #define CDNS_PCIE_LM_ID_VENDOR_MASK GENMASK(15, 0) #define CDNS_PCIE_LM_ID_VENDOR_SHIFT 0 #define CDNS_PCIE_LM_ID_VENDOR(vid) \ (((vid) << CDNS_PCIE_LM_ID_VENDOR_SHIFT) & CDNS_PCIE_LM_ID_VENDOR_MASK) #define CDNS_PCIE_LM_ID_SUBSYS_MASK GENMASK(31, 16) #define CDNS_PCIE_LM_ID_SUBSYS_SHIFT 16 #define CDNS_PCIE_LM_ID_SUBSYS(sub) \ (((sub) << CDNS_PCIE_LM_ID_SUBSYS_SHIFT) & CDNS_PCIE_LM_ID_SUBSYS_MASK) /* Root Port Requester ID Register */ #define CDNS_PCIE_LM_RP_RID (CDNS_PCIE_LM_BASE + 0x0228) #define CDNS_PCIE_LM_RP_RID_MASK GENMASK(15, 0) #define CDNS_PCIE_LM_RP_RID_SHIFT 0 #define CDNS_PCIE_LM_RP_RID_(rid) \ (((rid) << CDNS_PCIE_LM_RP_RID_SHIFT) & CDNS_PCIE_LM_RP_RID_MASK) /* Endpoint Bus and Device Number Register */ #define CDNS_PCIE_LM_EP_ID (CDNS_PCIE_LM_BASE + 0x022c) #define CDNS_PCIE_LM_EP_ID_DEV_MASK GENMASK(4, 0) #define CDNS_PCIE_LM_EP_ID_DEV_SHIFT 0 #define CDNS_PCIE_LM_EP_ID_BUS_MASK GENMASK(15, 8) #define CDNS_PCIE_LM_EP_ID_BUS_SHIFT 8 /* Endpoint Function f BAR b Configuration Registers */ #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG(bar, fn) \ (((bar) < BAR_4) ? CDNS_PCIE_LM_EP_FUNC_BAR_CFG0(fn) : CDNS_PCIE_LM_EP_FUNC_BAR_CFG1(fn)) #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG0(fn) \ (CDNS_PCIE_LM_BASE + 0x0240 + (fn) * 0x0008) #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG1(fn) \ (CDNS_PCIE_LM_BASE + 0x0244 + (fn) * 0x0008) #define CDNS_PCIE_LM_EP_VFUNC_BAR_CFG(bar, fn) \ (((bar) < BAR_4) ? CDNS_PCIE_LM_EP_VFUNC_BAR_CFG0(fn) : CDNS_PCIE_LM_EP_VFUNC_BAR_CFG1(fn)) #define CDNS_PCIE_LM_EP_VFUNC_BAR_CFG0(fn) \ (CDNS_PCIE_LM_BASE + 0x0280 + (fn) * 0x0008) #define CDNS_PCIE_LM_EP_VFUNC_BAR_CFG1(fn) \ (CDNS_PCIE_LM_BASE + 0x0284 + (fn) * 0x0008) #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b) \ (GENMASK(4, 0) << ((b) * 8)) #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE(b, a) \ (((a) << ((b) * 8)) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b)) #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b) \ (GENMASK(7, 5) << ((b) * 8)) #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL(b, c) \ (((c) << ((b) * 8 + 5)) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b)) /* Endpoint Function Configuration Register */ #define CDNS_PCIE_LM_EP_FUNC_CFG (CDNS_PCIE_LM_BASE + 0x02c0) /* Root Complex BAR Configuration Register */ #define CDNS_PCIE_LM_RC_BAR_CFG (CDNS_PCIE_LM_BASE + 0x0300) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK GENMASK(5, 0) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE(a) \ (((a) << 0) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK GENMASK(8, 6) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL(c) \ (((c) << 6) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK GENMASK(13, 9) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE(a) \ (((a) << 9) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK GENMASK(16, 14) #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL(c) \ (((c) << 14) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK) #define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_ENABLE BIT(17) #define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_32BITS 0 #define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_64BITS BIT(18) #define CDNS_PCIE_LM_RC_BAR_CFG_IO_ENABLE BIT(19) #define CDNS_PCIE_LM_RC_BAR_CFG_IO_16BITS 0 #define CDNS_PCIE_LM_RC_BAR_CFG_IO_32BITS BIT(20) #define CDNS_PCIE_LM_RC_BAR_CFG_CHECK_ENABLE BIT(31) /* BAR control values applicable to both Endpoint Function and Root Complex */ #define CDNS_PCIE_LM_BAR_CFG_CTRL_DISABLED 0x0 #define CDNS_PCIE_LM_BAR_CFG_CTRL_IO_32BITS 0x1 #define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_32BITS 0x4 #define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_32BITS 0x5 #define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS 0x6 #define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS 0x7 #define LM_RC_BAR_CFG_CTRL_DISABLED(bar) \ (CDNS_PCIE_LM_BAR_CFG_CTRL_DISABLED << (((bar) * 8) + 6)) #define LM_RC_BAR_CFG_CTRL_IO_32BITS(bar) \ (CDNS_PCIE_LM_BAR_CFG_CTRL_IO_32BITS << (((bar) * 8) + 6)) #define LM_RC_BAR_CFG_CTRL_MEM_32BITS(bar) \ (CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_32BITS << (((bar) * 8) + 6)) #define LM_RC_BAR_CFG_CTRL_PREF_MEM_32BITS(bar) \ (CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_32BITS << (((bar) * 8) + 6)) #define LM_RC_BAR_CFG_CTRL_MEM_64BITS(bar) \ (CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS << (((bar) * 8) + 6)) #define LM_RC_BAR_CFG_CTRL_PREF_MEM_64BITS(bar) \ (CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS << (((bar) * 8) + 6)) #define LM_RC_BAR_CFG_APERTURE(bar, aperture) \ (((aperture) - 2) << ((bar) * 8)) /* PTM Control Register */ #define CDNS_PCIE_LM_PTM_CTRL (CDNS_PCIE_LM_BASE + 0x0da8) #define CDNS_PCIE_LM_TPM_CTRL_PTMRSEN BIT(17) /* * Endpoint Function Registers (PCI configuration space for endpoint functions) */ #define CDNS_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12)) #define CDNS_PCIE_EP_FUNC_MSI_CAP_OFFSET 0x90 #define CDNS_PCIE_EP_FUNC_MSIX_CAP_OFFSET 0xb0 #define CDNS_PCIE_EP_FUNC_DEV_CAP_OFFSET 0xc0 #define CDNS_PCIE_EP_FUNC_SRIOV_CAP_OFFSET 0x200 /* * Root Port Registers (PCI configuration space for the root port function) */ #define CDNS_PCIE_RP_BASE 0x00200000 #define CDNS_PCIE_RP_CAP_OFFSET 0xc0 /* * Address Translation Registers */ #define CDNS_PCIE_AT_BASE 0x00400000 /* Region r Outbound AXI to PCIe Address Translation Register 0 */ #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0(r) \ (CDNS_PCIE_AT_BASE + 0x0000 + ((r) & 0x1f) * 0x0020) #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK GENMASK(5, 0) #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(nbits) \ (((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK) #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK GENMASK(19, 12) #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) \ (((devfn) << 12) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK) #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK GENMASK(27, 20) #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS(bus) \ (((bus) << 20) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK) /* Region r Outbound AXI to PCIe Address Translation Register 1 */ #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR1(r) \ (CDNS_PCIE_AT_BASE + 0x0004 + ((r) & 0x1f) * 0x0020) /* Region r Outbound PCIe Descriptor Register 0 */ #define CDNS_PCIE_AT_OB_REGION_DESC0(r) \ (CDNS_PCIE_AT_BASE + 0x0008 + ((r) & 0x1f) * 0x0020) #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MASK GENMASK(3, 0) #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MEM 0x2 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_IO 0x6 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0 0xa #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE1 0xb #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_NORMAL_MSG 0xc #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_VENDOR_MSG 0xd /* Bit 23 MUST be set in RC mode. */ #define CDNS_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID BIT(23) #define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK GENMASK(31, 24) #define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(devfn) \ (((devfn) << 24) & CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK) /* Region r Outbound PCIe Descriptor Register 1 */ #define CDNS_PCIE_AT_OB_REGION_DESC1(r) \ (CDNS_PCIE_AT_BASE + 0x000c + ((r) & 0x1f) * 0x0020) #define CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK GENMASK(7, 0) #define CDNS_PCIE_AT_OB_REGION_DESC1_BUS(bus) \ ((bus) & CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK) /* Region r AXI Region Base Address Register 0 */ #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r) \ (CDNS_PCIE_AT_BASE + 0x0018 + ((r) & 0x1f) * 0x0020) #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK GENMASK(5, 0) #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(nbits) \ (((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK) /* Region r AXI Region Base Address Register 1 */ #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r) \ (CDNS_PCIE_AT_BASE + 0x001c + ((r) & 0x1f) * 0x0020) /* Root Port BAR Inbound PCIe to AXI Address Translation Register */ #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0(bar) \ (CDNS_PCIE_AT_BASE + 0x0800 + (bar) * 0x0008) #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK GENMASK(5, 0) #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS(nbits) \ (((nbits) - 1) & CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK) #define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \ (CDNS_PCIE_AT_BASE + 0x0804 + (bar) * 0x0008) /* AXI link down register */ #define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824) /* LTSSM Capabilities register */ #define CDNS_PCIE_LTSSM_CONTROL_CAP (CDNS_PCIE_LM_BASE + 0x0054) #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK GENMASK(2, 1) #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT 1 #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY(delay) \ (((delay) << CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT) & \ CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK) enum cdns_pcie_rp_bar { RP_BAR_UNDEFINED = -1, RP_BAR0, RP_BAR1, RP_NO_BAR }; #define CDNS_PCIE_RP_MAX_IB 0x3 #define CDNS_PCIE_MAX_OB 32 struct cdns_pcie_rp_ib_bar { u64 size; bool free; }; /* Endpoint Function BAR Inbound PCIe to AXI Address Translation Register */ #define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \ (CDNS_PCIE_AT_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008) #define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \ (CDNS_PCIE_AT_BASE + 0x0844 + (fn) * 0x0040 + (bar) * 0x0008) /* Normal/Vendor specific message access: offset inside some outbound region */ #define CDNS_PCIE_NORMAL_MSG_ROUTING_MASK GENMASK(7, 5) #define CDNS_PCIE_NORMAL_MSG_ROUTING(route) \ (((route) << 5) & CDNS_PCIE_NORMAL_MSG_ROUTING_MASK) #define CDNS_PCIE_NORMAL_MSG_CODE_MASK GENMASK(15, 8) #define CDNS_PCIE_NORMAL_MSG_CODE(code) \ (((code) << 8) & CDNS_PCIE_NORMAL_MSG_CODE_MASK) #define CDNS_PCIE_MSG_NO_DATA BIT(16) struct cdns_pcie; enum cdns_pcie_msg_code { MSG_CODE_ASSERT_INTA = 0x20, MSG_CODE_ASSERT_INTB = 0x21, MSG_CODE_ASSERT_INTC = 0x22, MSG_CODE_ASSERT_INTD = 0x23, MSG_CODE_DEASSERT_INTA = 0x24, MSG_CODE_DEASSERT_INTB = 0x25, MSG_CODE_DEASSERT_INTC = 0x26, MSG_CODE_DEASSERT_INTD = 0x27, }; enum cdns_pcie_msg_routing { /* Route to Root Complex */ MSG_ROUTING_TO_RC, /* Use Address Routing */ MSG_ROUTING_BY_ADDR, /* Use ID Routing */ MSG_ROUTING_BY_ID, /* Route as Broadcast Message from Root Complex */ MSG_ROUTING_BCAST, /* Local message; terminate at receiver (INTx messages) */ MSG_ROUTING_LOCAL, /* Gather & route to Root Complex (PME_TO_Ack message) */ MSG_ROUTING_GATHER, }; struct cdns_pcie_ops { int (*start_link)(struct cdns_pcie *pcie); void (*stop_link)(struct cdns_pcie *pcie); bool (*link_up)(struct cdns_pcie *pcie); u64 (*cpu_addr_fixup)(struct cdns_pcie *pcie, u64 cpu_addr); }; /** * struct cdns_pcie - private data for Cadence PCIe controller drivers * @reg_base: IO mapped register base * @mem_res: start/end offsets in the physical system memory to map PCI accesses * @dev: PCIe controller * @is_rc: tell whether the PCIe controller mode is Root Complex or Endpoint. * @phy_count: number of supported PHY devices * @phy: list of pointers to specific PHY control blocks * @link: list of pointers to corresponding device link representations * @ops: Platform-specific ops to control various inputs from Cadence PCIe * wrapper */ struct cdns_pcie { void __iomem *reg_base; struct resource *mem_res; struct device *dev; bool is_rc; int phy_count; struct phy **phy; struct device_link **link; const struct cdns_pcie_ops *ops; }; /** * struct cdns_pcie_rc - private data for this PCIe Root Complex driver * @pcie: Cadence PCIe controller * @dev: pointer to PCIe device * @cfg_res: start/end offsets in the physical system memory to map PCI * configuration space accesses * @cfg_base: IO mapped window to access the PCI configuration space of a * single function at a time * @vendor_id: PCI vendor ID * @device_id: PCI device ID * @avail_ib_bar: Status of RP_BAR0, RP_BAR1 and RP_NO_BAR if it's free or * available * @quirk_retrain_flag: Retrain link as quirk for PCIe Gen2 * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk */ struct cdns_pcie_rc { struct cdns_pcie pcie; struct resource *cfg_res; void __iomem *cfg_base; u32 vendor_id; u32 device_id; bool avail_ib_bar[CDNS_PCIE_RP_MAX_IB]; unsigned int quirk_retrain_flag:1; unsigned int quirk_detect_quiet_flag:1; }; /** * struct cdns_pcie_epf - Structure to hold info about endpoint function * @epf: Info about virtual functions attached to the physical function * @epf_bar: reference to the pci_epf_bar for the six Base Address Registers */ struct cdns_pcie_epf { struct cdns_pcie_epf *epf; struct pci_epf_bar *epf_bar[PCI_STD_NUM_BARS]; }; /** * struct cdns_pcie_ep - private data for this PCIe endpoint controller driver * @pcie: Cadence PCIe controller * @max_regions: maximum number of regions supported by hardware * @ob_region_map: bitmask of mapped outbound regions * @ob_addr: base addresses in the AXI bus where the outbound regions start * @irq_phys_addr: base address on the AXI bus where the MSI/legacy IRQ * dedicated outbound regions is mapped. * @irq_cpu_addr: base address in the CPU space where a write access triggers * the sending of a memory write (MSI) / normal message (legacy * IRQ) TLP through the PCIe bus. * @irq_pci_addr: used to save the current mapping of the MSI/legacy IRQ * dedicated outbound region. * @irq_pci_fn: the latest PCI function that has updated the mapping of * the MSI/legacy IRQ dedicated outbound region. * @irq_pending: bitmask of asserted legacy IRQs. * @lock: spin lock to disable interrupts while modifying PCIe controller * registers fields (RMW) accessible by both remote RC and EP to * minimize time between read and write * @epf: Structure to hold info about endpoint function * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk * @quirk_disable_flr: Disable FLR (Function Level Reset) quirk flag */ struct cdns_pcie_ep { struct cdns_pcie pcie; u32 max_regions; unsigned long ob_region_map; phys_addr_t *ob_addr; phys_addr_t irq_phys_addr; void __iomem *irq_cpu_addr; u64 irq_pci_addr; u8 irq_pci_fn; u8 irq_pending; /* protect writing to PCI_STATUS while raising legacy interrupts */ spinlock_t lock; struct cdns_pcie_epf *epf; unsigned int quirk_detect_quiet_flag:1; unsigned int quirk_disable_flr:1; }; /* Register access */ static inline void cdns_pcie_writel(struct cdns_pcie *pcie, u32 reg, u32 value) { writel(value, pcie->reg_base + reg); } static inline u32 cdns_pcie_readl(struct cdns_pcie *pcie, u32 reg) { return readl(pcie->reg_base + reg); } static inline u32 cdns_pcie_read_sz(void __iomem *addr, int size) { void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4); unsigned int offset = (unsigned long)addr & 0x3; u32 val = readl(aligned_addr); if (!IS_ALIGNED((uintptr_t)addr, size)) { pr_warn("Address %p and size %d are not aligned\n", addr, size); return 0; } if (size > 2) return val; return (val >> (8 * offset)) & ((1 << (size * 8)) - 1); } static inline void cdns_pcie_write_sz(void __iomem *addr, int size, u32 value) { void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4); unsigned int offset = (unsigned long)addr & 0x3; u32 mask; u32 val; if (!IS_ALIGNED((uintptr_t)addr, size)) { pr_warn("Address %p and size %d are not aligned\n", addr, size); return; } if (size > 2) { writel(value, addr); return; } mask = ~(((1 << (size * 8)) - 1) << (offset * 8)); val = readl(aligned_addr) & mask; val |= value << (offset * 8); writel(val, aligned_addr); } /* Root Port register access */ static inline void cdns_pcie_rp_writeb(struct cdns_pcie *pcie, u32 reg, u8 value) { void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg; cdns_pcie_write_sz(addr, 0x1, value); } static inline void cdns_pcie_rp_writew(struct cdns_pcie *pcie, u32 reg, u16 value) { void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg; cdns_pcie_write_sz(addr, 0x2, value); } static inline u16 cdns_pcie_rp_readw(struct cdns_pcie *pcie, u32 reg) { void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg; return cdns_pcie_read_sz(addr, 0x2); } /* Endpoint Function register access */ static inline void cdns_pcie_ep_fn_writeb(struct cdns_pcie *pcie, u8 fn, u32 reg, u8 value) { void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg; cdns_pcie_write_sz(addr, 0x1, value); } static inline void cdns_pcie_ep_fn_writew(struct cdns_pcie *pcie, u8 fn, u32 reg, u16 value) { void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg; cdns_pcie_write_sz(addr, 0x2, value); } static inline void cdns_pcie_ep_fn_writel(struct cdns_pcie *pcie, u8 fn, u32 reg, u32 value) { writel(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg); } static inline u16 cdns_pcie_ep_fn_readw(struct cdns_pcie *pcie, u8 fn, u32 reg) { void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg; return cdns_pcie_read_sz(addr, 0x2); } static inline u32 cdns_pcie_ep_fn_readl(struct cdns_pcie *pcie, u8 fn, u32 reg) { return readl(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg); } static inline int cdns_pcie_start_link(struct cdns_pcie *pcie) { if (pcie->ops->start_link) return pcie->ops->start_link(pcie); return 0; } static inline void cdns_pcie_stop_link(struct cdns_pcie *pcie) { if (pcie->ops->stop_link) pcie->ops->stop_link(pcie); } static inline bool cdns_pcie_link_up(struct cdns_pcie *pcie) { if (pcie->ops->link_up) return pcie->ops->link_up(pcie); return true; } #ifdef CONFIG_PCIE_CADENCE_HOST int cdns_pcie_host_setup(struct cdns_pcie_rc *rc); void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn, int where); #else static inline int cdns_pcie_host_setup(struct cdns_pcie_rc *rc) { return 0; } static inline void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn, int where) { return NULL; } #endif #ifdef CONFIG_PCIE_CADENCE_EP int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep); #else static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep) { return 0; } #endif void cdns_pcie_detect_quiet_min_delay_set(struct cdns_pcie *pcie); void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn, u32 r, bool is_io, u64 cpu_addr, u64 pci_addr, size_t size); void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 busnr, u8 fn, u32 r, u64 cpu_addr); void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r); void cdns_pcie_disable_phy(struct cdns_pcie *pcie); int cdns_pcie_enable_phy(struct cdns_pcie *pcie); int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie); extern const struct dev_pm_ops cdns_pcie_pm_ops; #endif /* _PCIE_CADENCE_H */ |