rk3399_pcie.c revision 1.23
1 /* $NetBSD: rk3399_pcie.c,v 1.23 2024/11/21 07:15:00 skrll Exp $ */ 2 /* 3 * Copyright (c) 2018 Mark Kettenis <kettenis (at) openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/cdefs.h> 19 20 __KERNEL_RCSID(1, "$NetBSD: rk3399_pcie.c,v 1.23 2024/11/21 07:15:00 skrll Exp $"); 21 22 #include <sys/param.h> 23 #include <sys/systm.h> 24 #include <sys/bitops.h> 25 #include <sys/device.h> 26 #include <sys/kmem.h> 27 28 #include <machine/intr.h> 29 #include <sys/bus.h> 30 #include <dev/fdt/fdtvar.h> 31 #include <dev/fdt/syscon.h> 32 #include <arm/cpufunc.h> 33 34 #include <dev/pci/pcidevs.h> 35 #include <dev/pci/pcireg.h> 36 #include <dev/pci/pcivar.h> 37 #include <dev/pci/pciconf.h> 38 39 #include <arm/fdt/pcihost_fdtvar.h> 40 #include <sys/gpio.h> 41 42 #define SETREG(m, v) ((m)<<16|__SHIFTIN((v), (m))) 43 #define GETREG(m, v) (__SHIFTOUT((v), (m))) 44 45 /* APB region */ 46 #define PCIE_CLIENT_BASE 0x000000 47 #define PCIE_CLIENT_BASIC_STRAP_CONF 0x0000 48 #define PCBSC_PCIE_GEN_SEL __BIT(7) 49 #define PCBSC_PGS_GEN1 SETREG(PCBSC_PCIE_GEN_SEL, 0) 50 #define PCBSC_PGS_GEN2 SETREG(PCBSC_PCIE_GEN_SEL, 1) 51 #define PCBSC_MODE_SELECT __BIT(6) 52 #define PCBSC_MS_ENDPOINT SETREG(PCBSC_MODE_SELECT, 0) 53 #define PCBSC_MS_ROOTPORT SETREG(PCBSC_MODE_SELECT, 1) 54 #define PCBSC_LANE_COUNT __BITS(5,4) 55 #define PCBSC_LC(x) SETREG(PCBSC_LANE_COUNT, ilog2(x)) /* valid for x1,2,4 */ 56 #define PCBSC_ARI_EN SETREG(__BIT(3), 1) /* Alternate Routing ID Enable */ 57 #define PCBSC_SR_IOV_EN SETREG(__BIT(2), 1) 58 #define PCBSC_LINK_TRAIN_EN SETREG(__BIT(1), 1) 59 #define PCBSC_CONF_EN SETREG(__BIT(0), 1) /* Config enable */ 60 #define PCIE_CLIENT_DEBUG_OUT_0 0x003c 61 #define PCIE_CLIENT_DEBUG_OUT_1 0x0040 62 #define PCIE_CLIENT_BASIC_STATUS0 0x0044 63 #define PCIE_CLIENT_BASIC_STATUS1 0x0048 64 #define PCBS1_LINK_ST(x) (u_int)__SHIFTOUT((x), __BITS(21,20)) 65 #define PCBS1_LS_NO_RECV 0 /* no receivers */ 66 #define PCBS1_LS_TRAINING 1 /* link training */ 67 #define PCBS1_LS_DL_INIT 2 /* link up, DL init progressing */ 68 #define PCBS1_LS_DL_DONE 3 /* link up, DL init complete */ 69 #define PCIE_CLIENT_INT_MASK 0x004c 70 #define PCIM_INTx_MASK(x) SETREG(__BIT((x)+5), 1) 71 #define PCIM_INTx_ENAB(x) SETREG(__BIT((x)+5), 0) 72 73 #define PCIE_CORE_BASE 0x800000 74 #define PCIE_RC_NORMAL_BASE (PCIE_CORE_BASE + 0x00000) 75 76 #define PCIE_LM_BASE 0x900000 77 #define PCIE_LM_CORE_CTRL (PCIE_LM_BASE + 0x00) 78 #define PCIE_CORE_PL_CONF_SPEED_5G 0x00000008 79 #define PCIE_CORE_PL_CONF_SPEED_MASK 0x00000018 80 #define PCIE_CORE_PL_CONF_LANE_MASK 0x00000006 81 #define PCIE_CORE_PL_CONF_LANE_SHIFT 1 82 #define PCIE_LM_PLC1 (PCIE_LM_BASE + 0x04) 83 #define PCIE_LM_PLC1_FTS_MASK __BITS(23, 8) 84 #define PCIE_LM_VENDOR_ID (PCIE_LM_BASE + 0x44) 85 #define PCIE_LM_LINKWIDTH (PCIE_LM_BASE + 0x50) 86 #define PCIE_LM_LANEMAP (PCIE_LM_BASE + 0x200) 87 #define PCIE_LM_DEBUG_MUX_CONTROL (PCIE_LM_BASE + 0x208) 88 #define PCIE_LM_RCBAR (PCIE_LM_BASE + 0x300) 89 #define PCIE_LM_RCBARPME __BIT(17) 90 #define PCIE_LM_RCBARPMS __BIT(18) 91 #define PCIE_LM_RCBARPIE __BIT(19) 92 #define PCIE_LM_RCBARPIS __BIT(20) 93 94 #define PCIE_RC_BASE 0xa00000 95 #define PCIE_RC_CONFIG_DCSR (PCIE_RC_BASE + 0x0c0 + PCIE_DCSR) 96 #define PCIE_RC_PCIE_LCAP (PCIE_RC_BASE + 0x0c0 + PCIE_LCAP) 97 #define PCIE_RC_CONFIG_LCSR (PCIE_RC_BASE + 0x0c0 + PCIE_LCSR) 98 #define PCIE_RC_CONFIG_THP_CAP (PCIE_RC_BASE + 0x274) 99 #define PCIE_RC_CONFIG_THP_CAP_NEXT_MASK __BITS(31, 20) 100 101 102 #define PCIE_ATR_BASE 0xc00000 103 #define PCIE_ATR_OB_ADDR0(i) (PCIE_ATR_BASE + 0x000 + (i) * 0x20) 104 #define PCIE_ATR_OB_ADDR1(i) (PCIE_ATR_BASE + 0x004 + (i) * 0x20) 105 #define PCIE_ATR_OB_DESC0(i) (PCIE_ATR_BASE + 0x008 + (i) * 0x20) 106 #define PCIE_ATR_OB_DESC1(i) (PCIE_ATR_BASE + 0x00c + (i) * 0x20) 107 #define PCIE_ATR_IB_ADDR0(i) (PCIE_ATR_BASE + 0x800 + (i) * 0x8) 108 #define PCIE_ATR_IB_ADDR1(i) (PCIE_ATR_BASE + 0x804 + (i) * 0x8) 109 #define PCIE_ATR_HDR_MEM 0x2 110 #define PCIE_ATR_HDR_IO 0x6 111 #define PCIE_ATR_HDR_CFG_TYPE0 0xa 112 #define PCIE_ATR_HDR_CFG_TYPE1 0xb 113 #define PCIE_ATR_HDR_RID __BIT(23) 114 115 /* AXI region */ 116 #define PCIE_ATR_OB_REGION0_SIZE (32 * 1024 * 1024) 117 #define PCIE_ATR_OB_REGION_SIZE (1 * 1024 * 1024) 118 119 #define HREAD4(sc, reg) \ 120 bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)) 121 #define HWRITE4(sc, reg, val) \ 122 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 123 #define AXIPEEK4(sc, reg, valp) \ 124 bus_space_peek_4((sc)->sc_iot, (sc)->sc_axi_ioh, (reg), (valp)) 125 #define AXIPOKE4(sc, reg, val) \ 126 bus_space_poke_4((sc)->sc_iot, (sc)->sc_axi_ioh, (reg), (val)) 127 128 struct rkpcie_softc { 129 struct pcihost_softc sc_phsc; 130 bus_space_tag_t sc_iot; 131 bus_space_handle_t sc_ioh; 132 bus_space_handle_t sc_axi_ioh; 133 bus_addr_t sc_axi_addr; 134 bus_addr_t sc_apb_addr; 135 bus_size_t sc_axi_size; 136 bus_size_t sc_apb_size; 137 kmutex_t sc_conf_lock; 138 }; 139 140 static int rkpcie_match(device_t, cfdata_t, void *); 141 static void rkpcie_attach(device_t, device_t, void *); 142 143 CFATTACH_DECL_NEW(rkpcie, sizeof(struct rkpcie_softc), 144 rkpcie_match, rkpcie_attach, NULL, NULL); 145 146 static const struct device_compatible_entry compat_data[] = { 147 { .compat = "rockchip,rk3399-pcie" }, 148 DEVICE_COMPAT_EOL 149 }; 150 151 static int 152 rkpcie_match(device_t parent, cfdata_t cf, void *aux) 153 { 154 struct fdt_attach_args *faa = aux; 155 156 return of_compatible_match(faa->faa_phandle, compat_data); 157 } 158 159 static void rkpcie_atr_init(struct rkpcie_softc *); 160 161 static int rkpcie_bus_maxdevs(void *, int); 162 static pcitag_t rkpcie_make_tag(void *, int, int, int); 163 static void rkpcie_decompose_tag(void *, pcitag_t, int *, int *, int *); 164 static pcireg_t rkpcie_conf_read(void *, pcitag_t, int); 165 static void rkpcie_conf_write(void *, pcitag_t, int, pcireg_t); 166 static int rkpcie_conf_hook(void *, int, int, int, pcireg_t); 167 168 static struct fdtbus_interrupt_controller_func rkpcie_intrfuncs; 169 170 static inline void 171 clock_enable_all(int phandle) 172 { 173 for (u_int i = 0; i < 4; i++) { 174 struct clk * clk = fdtbus_clock_get_index(phandle, i); 175 if (clk == NULL) 176 continue; 177 if (clk_enable(clk) != 0) 178 continue; 179 } 180 } 181 182 static void 183 reset_assert(int phandle, const char *name) 184 { 185 struct fdtbus_reset *rst; 186 187 rst = fdtbus_reset_get(phandle, name); 188 fdtbus_reset_assert(rst); 189 fdtbus_reset_put(rst); 190 } 191 192 static void 193 reset_deassert(int phandle, const char *name) 194 { 195 struct fdtbus_reset *rst; 196 197 rst = fdtbus_reset_get(phandle, name); 198 fdtbus_reset_deassert(rst); 199 fdtbus_reset_put(rst); 200 } 201 202 static void 203 rkpcie_attach(device_t parent, device_t self, void *aux) 204 { 205 struct rkpcie_softc *sc = device_private(self); 206 struct pcihost_softc * const phsc = &sc->sc_phsc; 207 struct fdt_attach_args *faa = aux; 208 struct fdtbus_gpio_pin *ep_gpio; 209 u_int max_link_speed, num_lanes, bus_scan_delay_ms; 210 struct fdtbus_phy *phy[4]; 211 const u_int *bus_range; 212 uint32_t status; 213 uint32_t delayed_ms = 0; 214 int timo, len; 215 216 phsc->sc_dev = self; 217 phsc->sc_bst = faa->faa_bst; 218 phsc->sc_pci_bst = faa->faa_bst; 219 phsc->sc_dmat = faa->faa_dmat; 220 sc->sc_iot = phsc->sc_bst; 221 phsc->sc_phandle = faa->faa_phandle; 222 const int phandle = phsc->sc_phandle; 223 224 if (fdtbus_get_reg_byname(faa->faa_phandle, "axi-base", &sc->sc_axi_addr, &sc->sc_axi_size) != 0) { 225 aprint_error(": couldn't get axi registers\n"); 226 return; 227 } 228 if (fdtbus_get_reg_byname(faa->faa_phandle, "apb-base", &sc->sc_apb_addr, &sc->sc_apb_size) != 0) { 229 aprint_error(": couldn't get apb registers\n"); 230 sc->sc_axi_size = 0; 231 return; 232 } 233 234 const int mapflags = BUS_SPACE_MAP_NONPOSTED; 235 if (bus_space_map(sc->sc_iot, sc->sc_apb_addr, sc->sc_apb_size, mapflags, &sc->sc_ioh) != 0 || 236 bus_space_map(sc->sc_iot, sc->sc_axi_addr, sc->sc_axi_size, mapflags, &sc->sc_axi_ioh) != 0) { 237 printf(": can't map registers\n"); 238 sc->sc_axi_size = 0; 239 sc->sc_apb_size = 0; 240 return; 241 } 242 243 aprint_naive("\n"); 244 aprint_normal(": RK3399 PCIe\n"); 245 246 struct fdtbus_regulator *regulator; 247 regulator = fdtbus_regulator_acquire(phandle, "vpcie3v3-supply"); 248 if (regulator != NULL) { 249 fdtbus_regulator_enable(regulator); 250 fdtbus_regulator_release(regulator); 251 } 252 253 fdtbus_clock_assign(phandle); 254 clock_enable_all(phandle); 255 256 ep_gpio = fdtbus_gpio_acquire(phandle, "ep-gpios", GPIO_PIN_OUTPUT); 257 258 /* 259 * Let board-specific properties override the default, which is set 260 * to PCIe 1.x, due to errata in the RK3399 CPU. We don't know exactly 261 * what these errata involved (not public), but posts from the 262 * @rock-chips.com domain to u-boot and linux-kernel lists indicate 263 * that there is a errata related to this, and indeed, the Datasheet 264 * since at least Rev 1.6 and including the latest Rev 1.8 say that the 265 * PCIe can handle 2.5GT/s (ie, PCIe 1.x). 266 */ 267 if (of_getprop_uint32(phandle, "max-link-speed", &max_link_speed) != 0) 268 max_link_speed = 1; 269 if (of_getprop_uint32(phandle, "num-lanes", &num_lanes) != 0) 270 num_lanes = 1; 271 272 /* 273 * If the DT has a "bus-scan-delay-ms" property, delay attaching the 274 * PCI bus this many microseconds. 275 */ 276 if (of_getprop_uint32(phandle, "bus-scan-delay-ms", 277 &bus_scan_delay_ms) != 0) 278 bus_scan_delay_ms = 0; 279 280 again: 281 fdtbus_gpio_write(ep_gpio, 0); 282 283 reset_assert(phandle, "aclk"); 284 reset_assert(phandle, "pclk"); 285 reset_assert(phandle, "pm"); 286 287 memset(phy, 0, sizeof(phy)); 288 phy[0] = fdtbus_phy_get(phandle, "pcie-phy-0"); 289 if (phy[0] == NULL) { 290 phy[0] = fdtbus_phy_get(phandle, "pcie-phy"); 291 } else { 292 phy[1] = fdtbus_phy_get(phandle, "pcie-phy-1"); 293 phy[2] = fdtbus_phy_get(phandle, "pcie-phy-2"); 294 phy[3] = fdtbus_phy_get(phandle, "pcie-phy-3"); 295 } 296 297 reset_assert(phandle, "core"); 298 reset_assert(phandle, "mgmt"); 299 reset_assert(phandle, "mgmt-sticky"); 300 reset_assert(phandle, "pipe"); 301 302 delay(1000); /* TPERST. use 1ms */ 303 delayed_ms += 1; 304 305 reset_deassert(phandle, "pm"); 306 reset_deassert(phandle, "aclk"); 307 reset_deassert(phandle, "pclk"); 308 309 if (max_link_speed == 1) 310 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCBSC_PGS_GEN1); 311 else 312 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCBSC_PGS_GEN2); 313 314 /* Switch into Root Complex mode. */ 315 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, 316 PCBSC_MS_ROOTPORT | PCBSC_CONF_EN | PCBSC_LC(num_lanes)); 317 318 if (phy[3] && fdtbus_phy_enable(phy[3], true) != 0) { 319 aprint_error(": couldn't enable phy3\n"); 320 } 321 if (phy[2] && fdtbus_phy_enable(phy[2], true) != 0) { 322 aprint_error(": couldn't enable phy2\n"); 323 } 324 if (phy[1] && fdtbus_phy_enable(phy[1], true) != 0) { 325 aprint_error(": couldn't enable phy1\n"); 326 } 327 if (phy[0] && fdtbus_phy_enable(phy[0], true) != 0) { 328 aprint_error(": couldn't enable phy0\n"); 329 } 330 331 reset_deassert(phandle, "mgmt-sticky"); 332 reset_deassert(phandle, "core"); 333 reset_deassert(phandle, "mgmt"); 334 reset_deassert(phandle, "pipe"); 335 336 fdtbus_gpio_write(ep_gpio, 1); 337 delay(20000); /* 20 ms according to PCI-e BS "Conventional Reset" */ 338 delayed_ms += 20; 339 340 /* Start link training. */ 341 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCBSC_LINK_TRAIN_EN); 342 343 for (timo = 500; timo > 0; timo--) { 344 status = HREAD4(sc, PCIE_CLIENT_BASIC_STATUS1); 345 if (PCBS1_LINK_ST(status) == PCBS1_LS_DL_DONE) 346 break; 347 delay(1000); 348 delayed_ms += 1; 349 } 350 if (timo == 0) { 351 device_printf(self, "link training timeout (link_st %u)\n", 352 PCBS1_LINK_ST(status)); 353 if (max_link_speed > 1) { 354 --max_link_speed; 355 goto again; 356 } 357 return; 358 } 359 360 if (max_link_speed == 2) { 361 HWRITE4(sc, PCIE_RC_CONFIG_LCSR, HREAD4(sc, PCIE_RC_CONFIG_LCSR) | PCIE_LCSR_RETRAIN); 362 for (timo = 500; timo > 0; timo--) { 363 status = HREAD4(sc, PCIE_LM_CORE_CTRL); 364 if ((status & PCIE_CORE_PL_CONF_SPEED_MASK) == PCIE_CORE_PL_CONF_SPEED_5G) 365 break; 366 delay(1000); 367 delayed_ms += 1; 368 } 369 if (timo == 0) { 370 device_printf(self, "Gen2 link training timeout\n"); 371 --max_link_speed; 372 goto again; 373 } 374 } 375 delay(80000); /* wait 100 ms before CSR access. already waited 20. */ 376 delayed_ms += 80; 377 378 fdtbus_gpio_release(ep_gpio); 379 380 HWRITE4(sc, PCIE_RC_BASE + PCI_CLASS_REG, 381 PCI_CLASS_BRIDGE << PCI_CLASS_SHIFT | 382 PCI_SUBCLASS_BRIDGE_PCI << PCI_SUBCLASS_SHIFT); 383 384 /* Initialize Root Complex registers. */ 385 HWRITE4(sc, PCIE_LM_VENDOR_ID, PCI_VENDOR_ROCKCHIP); 386 HWRITE4(sc, PCIE_RC_BASE + PCI_CLASS_REG, 387 PCI_CLASS_BRIDGE << PCI_CLASS_SHIFT | 388 PCI_SUBCLASS_BRIDGE_PCI << PCI_SUBCLASS_SHIFT); 389 HWRITE4(sc, PCIE_LM_RCBAR, PCIE_LM_RCBARPIE | PCIE_LM_RCBARPIS); 390 391 /* remove L1 substate cap */ 392 status = HREAD4(sc, PCIE_RC_CONFIG_THP_CAP); 393 status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK; 394 HWRITE4(sc, PCIE_RC_CONFIG_THP_CAP, status); 395 396 if (of_hasprop(phandle, "aspm-no-l0s")) { 397 status = HREAD4(sc, PCIE_RC_PCIE_LCAP); 398 status &= ~__SHIFTIN(1, PCIE_LCAP_ASPM); 399 HWRITE4(sc, PCIE_RC_PCIE_LCAP, status); 400 } 401 402 /* Default bus ranges */ 403 sc->sc_phsc.sc_bus_min = 0; 404 sc->sc_phsc.sc_bus_max = 31; 405 406 /* Override bus range from DT */ 407 bus_range = fdtbus_get_prop(phandle, "bus-range", &len); 408 if (len == 8) { 409 sc->sc_phsc.sc_bus_min = be32dec(&bus_range[0]); 410 sc->sc_phsc.sc_bus_max = be32dec(&bus_range[1]); 411 } 412 413 if (sc->sc_phsc.sc_bus_min != 0) { 414 aprint_error_dev(self, "bus-range doesn't start at 0\n"); 415 return; 416 } 417 418 /* Configure Address Translation. */ 419 rkpcie_atr_init(sc); 420 421 fdtbus_register_interrupt_controller(self, 422 OF_child(sc->sc_phsc.sc_phandle), &rkpcie_intrfuncs); 423 424 sc->sc_phsc.sc_type = PCIHOST_ECAM; 425 sc->sc_phsc.sc_pci_flags |= PCI_FLAGS_MSI_OKAY; 426 sc->sc_phsc.sc_pci_flags |= PCI_FLAGS_MSIX_OKAY; 427 pcihost_init(&sc->sc_phsc.sc_pc, sc); 428 sc->sc_phsc.sc_pc.pc_bus_maxdevs = rkpcie_bus_maxdevs; 429 sc->sc_phsc.sc_pc.pc_make_tag = rkpcie_make_tag; 430 sc->sc_phsc.sc_pc.pc_decompose_tag = rkpcie_decompose_tag; 431 sc->sc_phsc.sc_pc.pc_conf_read = rkpcie_conf_read; 432 sc->sc_phsc.sc_pc.pc_conf_write = rkpcie_conf_write; 433 sc->sc_phsc.sc_pc.pc_conf_hook = rkpcie_conf_hook; 434 435 if (bus_scan_delay_ms > delayed_ms) { 436 uint32_t ms = bus_scan_delay_ms - delayed_ms; 437 438 aprint_verbose_dev(phsc->sc_dev, 439 "waiting %u extra ms for reset (already waited %u)\n", 440 ms, delayed_ms); 441 delay(ms * 1000); 442 } 443 444 mutex_init(&sc->sc_conf_lock, MUTEX_DEFAULT, IPL_HIGH); 445 pcihost_init2(&sc->sc_phsc); 446 } 447 448 static void 449 rkpcie_atr_init(struct rkpcie_softc *sc) 450 { 451 const u_int *ranges; 452 bus_addr_t aaddr; 453 bus_addr_t addr; 454 bus_size_t size, resid, offset; 455 uint32_t type; 456 int region, i, ranges_len; 457 458 /* Use region 0 to map PCI configuration space */ 459 HWRITE4(sc, PCIE_ATR_OB_ADDR0(0), 20 - 1); 460 HWRITE4(sc, PCIE_ATR_OB_ADDR1(0), 0); 461 HWRITE4(sc, PCIE_ATR_OB_DESC0(0), PCIE_ATR_HDR_CFG_TYPE0 | PCIE_ATR_HDR_RID); 462 HWRITE4(sc, PCIE_ATR_OB_DESC1(0), 0); 463 464 ranges = fdtbus_get_prop(sc->sc_phsc.sc_phandle, "ranges", &ranges_len); 465 if (ranges == NULL) 466 goto fail; 467 const int ranges_cells = ranges_len / 4; 468 469 for (i = 0; i < ranges_cells; i += 7) { 470 /* Handle IO and MMIO. */ 471 switch (be32toh(ranges[i]) & 0x03000000) { 472 case 0x01000000: 473 type = PCIE_ATR_HDR_IO; 474 break; 475 case 0x02000000: 476 case 0x03000000: 477 type = PCIE_ATR_HDR_MEM; 478 break; 479 default: 480 continue; 481 } 482 483 addr = ((uint64_t)be32toh(ranges[i + 1]) << 32) + be32toh(ranges[i + 2]); 484 aaddr = ((uint64_t)be32toh(ranges[i + 3]) << 32) + be32toh(ranges[i + 4]); 485 size = be32toh(ranges[i + 6]); 486 487 /* Only support mappings aligned on a region boundary. */ 488 if (addr & (PCIE_ATR_OB_REGION_SIZE - 1)) 489 goto fail; 490 if (aaddr & (PCIE_ATR_OB_REGION_SIZE - 1)) 491 goto fail; 492 if (size & (PCIE_ATR_OB_REGION_SIZE - 1)) 493 goto fail; 494 495 /* Mappings should lie in AXI region. */ 496 if (aaddr < sc->sc_axi_addr) 497 goto fail; 498 if (aaddr + size > sc->sc_axi_addr + 64*1024*1024) 499 goto fail; 500 501 offset = addr - sc->sc_axi_addr - PCIE_ATR_OB_REGION0_SIZE; 502 region = 1 + (offset / PCIE_ATR_OB_REGION_SIZE); 503 resid = size; 504 while (resid > 0) { 505 HWRITE4(sc, PCIE_ATR_OB_ADDR0(region), 32 - 1); 506 HWRITE4(sc, PCIE_ATR_OB_ADDR1(region), 0); 507 HWRITE4(sc, PCIE_ATR_OB_DESC0(region), type | PCIE_ATR_HDR_RID); 508 HWRITE4(sc, PCIE_ATR_OB_DESC1(region), 0); 509 510 addr += PCIE_ATR_OB_REGION_SIZE; 511 resid -= PCIE_ATR_OB_REGION_SIZE; 512 region++; 513 } 514 } 515 516 /* Passthrough inbound translations unmodified. */ 517 HWRITE4(sc, PCIE_ATR_IB_ADDR0(2), 32 - 1); 518 HWRITE4(sc, PCIE_ATR_IB_ADDR1(2), 0); 519 520 return; 521 522 fail: 523 device_printf(sc->sc_phsc.sc_dev, "can't map ranges\n"); 524 } 525 526 int 527 rkpcie_bus_maxdevs(void *v, int bus) 528 { 529 struct rkpcie_softc *rksc = v; 530 struct pcihost_softc *sc = &rksc->sc_phsc; 531 532 if (bus == sc->sc_bus_min || bus == sc->sc_bus_min + 1) 533 return 1; 534 return 32; 535 } 536 537 pcitag_t 538 rkpcie_make_tag(void *v, int bus, int device, int function) 539 { 540 /* Return ECAM address. */ 541 return ((bus << 20) | (device << 15) | (function << 12)); 542 } 543 544 void 545 rkpcie_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 546 { 547 if (bp != NULL) 548 *bp = (tag >> 20) & 0xff; 549 if (dp != NULL) 550 *dp = (tag >> 15) & 0x1f; 551 if (fp != NULL) 552 *fp = (tag >> 12) & 0x7; 553 } 554 555 /* Only one device on root port and the first subordinate port. */ 556 static bool 557 rkpcie_conf_ok(int bus, int dev, int fn, int offset, struct rkpcie_softc *sc) 558 { 559 int bus_min = sc->sc_phsc.sc_bus_min; 560 561 if ((unsigned int)offset >= (1<<12)) 562 return false; 563 /* first two buses use type 0 cfg which doesn't use bus/device numbers */ 564 if (dev != 0 && (bus == bus_min || bus == bus_min + 1)) 565 return false; 566 return true; 567 } 568 569 pcireg_t 570 rkpcie_conf_read(void *v, pcitag_t tag, int offset) 571 { 572 struct rkpcie_softc *sc = v; 573 int bus_min = sc->sc_phsc.sc_bus_min; 574 int bus, dev, fn; 575 u_int reg; 576 int32_t val; 577 578 KASSERT(offset >= 0); 579 KASSERT(offset < PCI_EXTCONF_SIZE); 580 581 rkpcie_decompose_tag(sc, tag, &bus, &dev, &fn); 582 if (!rkpcie_conf_ok(bus, dev, fn, offset, sc)) 583 return 0xffffffff; 584 reg = (dev << 15) | (fn << 12) | offset; 585 586 if (bus == bus_min) 587 val = HREAD4(sc, PCIE_RC_NORMAL_BASE + reg); 588 else { 589 mutex_spin_enter(&sc->sc_conf_lock); 590 HWRITE4(sc, PCIE_ATR_OB_ADDR0(0), 591 (bus << 20) | (20 - 1)); 592 HWRITE4(sc, PCIE_ATR_OB_DESC0(0), 593 PCIE_ATR_HDR_RID | ((bus == bus_min + 1) 594 ? PCIE_ATR_HDR_CFG_TYPE0 : PCIE_ATR_HDR_CFG_TYPE1)); 595 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_apb_size, 596 BUS_SPACE_BARRIER_READ); 597 if (AXIPEEK4(sc, reg, &val) != 0) 598 val = 0xffffffff; 599 bus_space_barrier(sc->sc_iot, sc->sc_axi_ioh, 600 0, sc->sc_axi_size, 601 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 602 mutex_spin_exit(&sc->sc_conf_lock); 603 } 604 return val; 605 } 606 607 void 608 rkpcie_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data) 609 { 610 struct rkpcie_softc *sc = v; 611 int bus_min = sc->sc_phsc.sc_bus_min; 612 int bus, dev, fn; 613 u_int reg; 614 615 KASSERT(offset >= 0); 616 KASSERT(offset < PCI_EXTCONF_SIZE); 617 618 rkpcie_decompose_tag(sc, tag, &bus, &dev, &fn); 619 if (!rkpcie_conf_ok(bus, dev, fn, offset, sc)) 620 return; 621 reg = (dev << 15) | (fn << 12) | offset; 622 623 if (bus == bus_min) 624 HWRITE4(sc, PCIE_RC_NORMAL_BASE + reg, data); 625 else { 626 mutex_spin_enter(&sc->sc_conf_lock); 627 HWRITE4(sc, PCIE_ATR_OB_ADDR0(0), 628 (bus << 20) | (20 - 1)); 629 HWRITE4(sc, PCIE_ATR_OB_DESC0(0), 630 PCIE_ATR_HDR_RID | ((bus == bus_min + 1) 631 ? PCIE_ATR_HDR_CFG_TYPE0 : PCIE_ATR_HDR_CFG_TYPE1)); 632 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_apb_size, 633 BUS_SPACE_BARRIER_WRITE); 634 AXIPOKE4(sc, reg, data); 635 bus_space_barrier(sc->sc_iot, sc->sc_axi_ioh, 636 0, sc->sc_axi_size, 637 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 638 mutex_spin_exit(&sc->sc_conf_lock); 639 } 640 } 641 642 static int 643 rkpcie_conf_hook(void *v, int b, int d, int f, pcireg_t id) 644 { 645 return (PCI_CONF_DEFAULT & ~PCI_CONF_ENABLE_BM) | PCI_CONF_MAP_ROM; 646 } 647 648 /* INTx interrupt controller */ 649 static void * 650 rkpcie_intx_establish(device_t dev, u_int *specifier, int ipl, int flags, 651 int (*func)(void *), void *arg, const char *xname) 652 { 653 struct rkpcie_softc *sc = device_private(dev); 654 void *cookie; 655 656 #if notyet 657 const u_int pin = be32toh(specifier[0]); 658 #endif 659 660 /* Unmask legacy interrupts. */ 661 HWRITE4(sc, PCIE_CLIENT_INT_MASK, 662 PCIM_INTx_ENAB(0) | PCIM_INTx_ENAB(1) | 663 PCIM_INTx_ENAB(2) | PCIM_INTx_ENAB(3)); 664 665 cookie = fdtbus_intr_establish_byname(sc->sc_phsc.sc_phandle, 666 "legacy", ipl, flags, func, arg, xname); 667 668 return cookie; 669 } 670 671 static void 672 rkpcie_intx_disestablish(device_t dev, void *ih) 673 { 674 struct rkpcie_softc *sc = device_private(dev); 675 device_printf(dev, "%s\n", __func__); 676 fdtbus_intr_disestablish(sc->sc_phsc.sc_phandle, ih); 677 } 678 679 static bool 680 rkpcie_intx_intrstr(device_t dev, u_int *specifier, char *buf, size_t buflen) 681 { 682 struct rkpcie_softc *sc = device_private(dev); 683 684 fdtbus_intr_str(sc->sc_phsc.sc_phandle, 1, buf, buflen); 685 686 return true; 687 } 688 689 static struct fdtbus_interrupt_controller_func rkpcie_intrfuncs = { 690 .establish = rkpcie_intx_establish, 691 .disestablish = rkpcie_intx_disestablish, 692 .intrstr = rkpcie_intx_intrstr, 693 }; 694
Indexes created Thu Oct 02 10:09:58 GMT 2025