1 /*- 2 * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * Nvidia Integrated PCI/PCI-Express controller driver. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/devmap.h> 38 #include <sys/proc.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/mutex.h> 43 #include <sys/rman.h> 44 45 #include <machine/intr.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_extern.h> 49 #include <vm/vm_kern.h> 50 #include <vm/pmap.h> 51 52 #include <dev/extres/clk/clk.h> 53 #include <dev/extres/hwreset/hwreset.h> 54 #include <dev/extres/phy/phy.h> 55 #include <dev/extres/regulator/regulator.h> 56 #include <dev/fdt/fdt_common.h> 57 #include <dev/ofw/ofw_bus.h> 58 #include <dev/ofw/ofw_bus_subr.h> 59 #include <dev/ofw/ofw_pci.h> 60 #include <dev/ofw/ofwpci.h> 61 #include <dev/pci/pcivar.h> 62 #include <dev/pci/pcireg.h> 63 #include <dev/pci/pcib_private.h> 64 65 #include <machine/resource.h> 66 #include <machine/bus.h> 67 68 #include <arm/nvidia/tegra_pmc.h> 69 70 #include "ofw_bus_if.h" 71 #include "msi_if.h" 72 #include "pcib_if.h" 73 #include "pic_if.h" 74 75 76 #define AFI_AXI_BAR0_SZ 0x000 77 #define AFI_AXI_BAR1_SZ 0x004 78 #define AFI_AXI_BAR2_SZ 0x008 79 #define AFI_AXI_BAR3_SZ 0x00c 80 #define AFI_AXI_BAR4_SZ 0x010 81 #define AFI_AXI_BAR5_SZ 0x014 82 #define AFI_AXI_BAR0_START 0x018 83 #define AFI_AXI_BAR1_START 0x01c 84 #define AFI_AXI_BAR2_START 0x020 85 #define AFI_AXI_BAR3_START 0x024 86 #define AFI_AXI_BAR4_START 0x028 87 #define AFI_AXI_BAR5_START 0x02c 88 #define AFI_FPCI_BAR0 0x030 89 #define AFI_FPCI_BAR1 0x034 90 #define AFI_FPCI_BAR2 0x038 91 #define AFI_FPCI_BAR3 0x03c 92 #define AFI_FPCI_BAR4 0x040 93 #define AFI_FPCI_BAR5 0x044 94 #define AFI_MSI_BAR_SZ 0x060 95 #define AFI_MSI_FPCI_BAR_ST 0x064 96 #define AFI_MSI_AXI_BAR_ST 0x068 97 #define AFI_MSI_VEC(x) (0x06c + 4 * (x)) 98 #define AFI_MSI_EN_VEC(x) (0x08c + 4 * (x)) 99 #define AFI_MSI_INTR_IN_REG 32 100 #define AFI_MSI_REGS 8 101 102 #define AFI_CONFIGURATION 0x0ac 103 #define AFI_CONFIGURATION_EN_FPCI (1 << 0) 104 105 #define AFI_FPCI_ERROR_MASKS 0x0b0 106 #define AFI_INTR_MASK 0x0b4 107 #define AFI_INTR_MASK_MSI_MASK (1 << 8) 108 #define AFI_INTR_MASK_INT_MASK (1 << 0) 109 110 #define AFI_INTR_CODE 0x0b8 111 #define AFI_INTR_CODE_MASK 0xf 112 #define AFI_INTR_CODE_INT_CODE_INI_SLVERR 1 113 #define AFI_INTR_CODE_INT_CODE_INI_DECERR 2 114 #define AFI_INTR_CODE_INT_CODE_TGT_SLVERR 3 115 #define AFI_INTR_CODE_INT_CODE_TGT_DECERR 4 116 #define AFI_INTR_CODE_INT_CODE_TGT_WRERR 5 117 #define AFI_INTR_CODE_INT_CODE_SM_MSG 6 118 #define AFI_INTR_CODE_INT_CODE_DFPCI_DECERR 7 119 #define AFI_INTR_CODE_INT_CODE_AXI_DECERR 8 120 #define AFI_INTR_CODE_INT_CODE_FPCI_TIMEOUT 9 121 #define AFI_INTR_CODE_INT_CODE_PE_PRSNT_SENSE 10 122 #define AFI_INTR_CODE_INT_CODE_PE_CLKREQ_SENSE 11 123 #define AFI_INTR_CODE_INT_CODE_CLKCLAMP_SENSE 12 124 #define AFI_INTR_CODE_INT_CODE_RDY4PD_SENSE 13 125 #define AFI_INTR_CODE_INT_CODE_P2P_ERROR 14 126 127 128 #define AFI_INTR_SIGNATURE 0x0bc 129 #define AFI_UPPER_FPCI_ADDRESS 0x0c0 130 #define AFI_SM_INTR_ENABLE 0x0c4 131 #define AFI_SM_INTR_RP_DEASSERT (1 << 14) 132 #define AFI_SM_INTR_RP_ASSERT (1 << 13) 133 #define AFI_SM_INTR_HOTPLUG (1 << 12) 134 #define AFI_SM_INTR_PME (1 << 11) 135 #define AFI_SM_INTR_FATAL_ERROR (1 << 10) 136 #define AFI_SM_INTR_UNCORR_ERROR (1 << 9) 137 #define AFI_SM_INTR_CORR_ERROR (1 << 8) 138 #define AFI_SM_INTR_INTD_DEASSERT (1 << 7) 139 #define AFI_SM_INTR_INTC_DEASSERT (1 << 6) 140 #define AFI_SM_INTR_INTB_DEASSERT (1 << 5) 141 #define AFI_SM_INTR_INTA_DEASSERT (1 << 4) 142 #define AFI_SM_INTR_INTD_ASSERT (1 << 3) 143 #define AFI_SM_INTR_INTC_ASSERT (1 << 2) 144 #define AFI_SM_INTR_INTB_ASSERT (1 << 1) 145 #define AFI_SM_INTR_INTA_ASSERT (1 << 0) 146 147 #define AFI_AFI_INTR_ENABLE 0x0c8 148 #define AFI_AFI_INTR_ENABLE_CODE(code) (1 << (code)) 149 150 #define AFI_PCIE_CONFIG 0x0f8 151 #define AFI_PCIE_CONFIG_PCIE_DISABLE(x) (1 << ((x) + 1)) 152 #define AFI_PCIE_CONFIG_PCIE_DISABLE_ALL 0x6 153 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK (0xf << 20) 154 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_XBAR2_1 (0x0 << 20) 155 #define AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_XBAR4_1 (0x1 << 20) 156 157 #define AFI_FUSE 0x104 158 #define AFI_FUSE_PCIE_T0_GEN2_DIS (1 << 2) 159 160 #define AFI_PEX0_CTRL 0x110 161 #define AFI_PEX1_CTRL 0x118 162 #define AFI_PEX2_CTRL 0x128 163 #define AFI_PEX_CTRL_OVERRIDE_EN (1 << 4) 164 #define AFI_PEX_CTRL_REFCLK_EN (1 << 3) 165 #define AFI_PEX_CTRL_CLKREQ_EN (1 << 1) 166 #define AFI_PEX_CTRL_RST_L (1 << 0) 167 168 #define AFI_AXI_BAR6_SZ 0x134 169 #define AFI_AXI_BAR7_SZ 0x138 170 #define AFI_AXI_BAR8_SZ 0x13c 171 #define AFI_AXI_BAR6_START 0x140 172 #define AFI_AXI_BAR7_START 0x144 173 #define AFI_AXI_BAR8_START 0x148 174 #define AFI_FPCI_BAR6 0x14c 175 #define AFI_FPCI_BAR7 0x150 176 #define AFI_FPCI_BAR8 0x154 177 #define AFI_PLLE_CONTROL 0x160 178 #define AFI_PLLE_CONTROL_BYPASS_PADS2PLLE_CONTROL (1 << 9) 179 #define AFI_PLLE_CONTROL_BYPASS_PCIE2PLLE_CONTROL (1 << 8) 180 #define AFI_PLLE_CONTROL_PADS2PLLE_CONTROL_EN (1 << 1) 181 #define AFI_PLLE_CONTROL_PCIE2PLLE_CONTROL_EN (1 << 0) 182 183 #define AFI_PEXBIAS_CTRL 0x168 184 185 /* FPCI Address space */ 186 #define FPCI_MAP_IO 0xfdfc000000ULL 187 #define FPCI_MAP_TYPE0_CONFIG 0xfdfc000000ULL 188 #define FPCI_MAP_TYPE1_CONFIG 0xfdff000000ULL 189 #define FPCI_MAP_EXT_TYPE0_CONFIG 0xfe00000000ULL 190 #define FPCI_MAP_EXT_TYPE1_CONFIG 0xfe10000000ULL 191 192 /* Configuration space */ 193 #define RP_VEND_XP 0x00000F00 194 #define RP_VEND_XP_DL_UP (1 << 30) 195 196 #define RP_PRIV_MISC 0x00000FE0 197 #define RP_PRIV_MISC_PRSNT_MAP_EP_PRSNT (0xE << 0) 198 #define RP_PRIV_MISC_PRSNT_MAP_EP_ABSNT (0xF << 0) 199 200 #define RP_LINK_CONTROL_STATUS 0x00000090 201 #define RP_LINK_CONTROL_STATUS_DL_LINK_ACTIVE 0x20000000 202 #define RP_LINK_CONTROL_STATUS_LINKSTAT_MASK 0x3fff0000 203 204 #define TEGRA_PCIE_LINKUP_TIMEOUT 200 205 206 #define TEGRA_PCIB_MSI_ENABLE 207 208 #define DEBUG 209 #ifdef DEBUG 210 #define debugf(fmt, args...) do { printf(fmt,##args); } while (0) 211 #else 212 #define debugf(fmt, args...) 213 #endif 214 215 /* 216 * Configuration space format: 217 * [27:24] extended register 218 * [23:16] bus 219 * [15:11] slot (device) 220 * [10: 8] function 221 * [ 7: 0] register 222 */ 223 #define PCI_CFG_EXT_REG(reg) ((((reg) >> 8) & 0x0f) << 24) 224 #define PCI_CFG_BUS(bus) (((bus) & 0xff) << 16) 225 #define PCI_CFG_DEV(dev) (((dev) & 0x1f) << 11) 226 #define PCI_CFG_FUN(fun) (((fun) & 0x07) << 8) 227 #define PCI_CFG_BASE_REG(reg) ((reg) & 0xff) 228 229 #define PADS_WR4(_sc, _r, _v) bus_write_4((_sc)-pads_mem_res, (_r), (_v)) 230 #define PADS_RD4(_sc, _r) bus_read_4((_sc)->pads_mem_res, (_r)) 231 #define AFI_WR4(_sc, _r, _v) bus_write_4((_sc)->afi_mem_res, (_r), (_v)) 232 #define AFI_RD4(_sc, _r) bus_read_4((_sc)->afi_mem_res, (_r)) 233 234 static struct { 235 bus_size_t axi_start; 236 bus_size_t fpci_start; 237 bus_size_t size; 238 } bars[] = { 239 {AFI_AXI_BAR0_START, AFI_FPCI_BAR0, AFI_AXI_BAR0_SZ}, /* BAR 0 */ 240 {AFI_AXI_BAR1_START, AFI_FPCI_BAR1, AFI_AXI_BAR1_SZ}, /* BAR 1 */ 241 {AFI_AXI_BAR2_START, AFI_FPCI_BAR2, AFI_AXI_BAR2_SZ}, /* BAR 2 */ 242 {AFI_AXI_BAR3_START, AFI_FPCI_BAR3, AFI_AXI_BAR3_SZ}, /* BAR 3 */ 243 {AFI_AXI_BAR4_START, AFI_FPCI_BAR4, AFI_AXI_BAR4_SZ}, /* BAR 4 */ 244 {AFI_AXI_BAR5_START, AFI_FPCI_BAR5, AFI_AXI_BAR5_SZ}, /* BAR 5 */ 245 {AFI_AXI_BAR6_START, AFI_FPCI_BAR6, AFI_AXI_BAR6_SZ}, /* BAR 6 */ 246 {AFI_AXI_BAR7_START, AFI_FPCI_BAR7, AFI_AXI_BAR7_SZ}, /* BAR 7 */ 247 {AFI_AXI_BAR8_START, AFI_FPCI_BAR8, AFI_AXI_BAR8_SZ}, /* BAR 8 */ 248 {AFI_MSI_AXI_BAR_ST, AFI_MSI_FPCI_BAR_ST, AFI_MSI_BAR_SZ}, /* MSI 9 */ 249 }; 250 251 /* Compatible devices. */ 252 static struct ofw_compat_data compat_data[] = { 253 {"nvidia,tegra124-pcie", 1}, 254 {NULL, 0}, 255 }; 256 257 #define TEGRA_FLAG_MSI_USED 0x0001 258 struct tegra_pcib_irqsrc { 259 struct intr_irqsrc isrc; 260 u_int irq; 261 u_int flags; 262 }; 263 264 struct tegra_pcib_port { 265 int enabled; 266 int port_idx; /* chip port index */ 267 int num_lanes; /* number of lanes */ 268 bus_size_t afi_pex_ctrl; /* offset of afi_pex_ctrl */ 269 270 /* Config space properties. */ 271 bus_addr_t rp_base_addr; /* PA of config window */ 272 bus_size_t rp_size; /* size of config window */ 273 bus_space_handle_t cfg_handle; /* handle of config window */ 274 }; 275 276 #define TEGRA_PCIB_MAX_PORTS 3 277 #define TEGRA_PCIB_MAX_MSI AFI_MSI_INTR_IN_REG * AFI_MSI_REGS 278 struct tegra_pcib_softc { 279 struct ofw_pci_softc ofw_pci; 280 device_t dev; 281 struct mtx mtx; 282 struct resource *pads_mem_res; 283 struct resource *afi_mem_res; 284 struct resource *cfg_mem_res; 285 struct resource *irq_res; 286 struct resource *msi_irq_res; 287 void *intr_cookie; 288 void *msi_intr_cookie; 289 290 struct ofw_pci_range mem_range; 291 struct ofw_pci_range pref_mem_range; 292 struct ofw_pci_range io_range; 293 294 phy_t phy; 295 clk_t clk_pex; 296 clk_t clk_afi; 297 clk_t clk_pll_e; 298 clk_t clk_cml; 299 hwreset_t hwreset_pex; 300 hwreset_t hwreset_afi; 301 hwreset_t hwreset_pcie_x; 302 regulator_t supply_avddio_pex; 303 regulator_t supply_dvddio_pex; 304 regulator_t supply_avdd_pex_pll; 305 regulator_t supply_hvdd_pex; 306 regulator_t supply_hvdd_pex_pll_e; 307 regulator_t supply_vddio_pex_ctl; 308 regulator_t supply_avdd_pll_erefe; 309 310 vm_offset_t msi_page; /* VA of MSI page */ 311 bus_addr_t cfg_base_addr; /* base address of config */ 312 bus_size_t cfg_cur_offs; /* currently mapped window */ 313 bus_space_handle_t cfg_handle; /* handle of config window */ 314 bus_space_tag_t bus_tag; /* tag of config window */ 315 int lanes_cfg; 316 int num_ports; 317 struct tegra_pcib_port *ports[TEGRA_PCIB_MAX_PORTS]; 318 struct tegra_pcib_irqsrc *isrcs; 319 }; 320 321 static int 322 tegra_pcib_maxslots(device_t dev) 323 { 324 return (16); 325 } 326 327 static int 328 tegra_pcib_route_interrupt(device_t bus, device_t dev, int pin) 329 { 330 struct tegra_pcib_softc *sc; 331 u_int irq; 332 333 sc = device_get_softc(bus); 334 irq = intr_map_clone_irq(rman_get_start(sc->irq_res)); 335 device_printf(bus, "route pin %d for device %d.%d to %u\n", 336 pin, pci_get_slot(dev), pci_get_function(dev), 337 irq); 338 339 return (irq); 340 } 341 342 static int 343 tegra_pcbib_map_cfg(struct tegra_pcib_softc *sc, u_int bus, u_int slot, 344 u_int func, u_int reg) 345 { 346 bus_size_t offs; 347 int rv; 348 349 offs = sc->cfg_base_addr; 350 offs |= PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) | PCI_CFG_FUN(func) | 351 PCI_CFG_EXT_REG(reg); 352 if ((sc->cfg_handle != 0) && (sc->cfg_cur_offs == offs)) 353 return (0); 354 if (sc->cfg_handle != 0) 355 bus_space_unmap(sc->bus_tag, sc->cfg_handle, 0x800); 356 357 rv = bus_space_map(sc->bus_tag, offs, 0x800, 0, &sc->cfg_handle); 358 if (rv != 0) 359 device_printf(sc->dev, "Cannot map config space\n"); 360 else 361 sc->cfg_cur_offs = offs; 362 return (rv); 363 } 364 365 static uint32_t 366 tegra_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, 367 u_int reg, int bytes) 368 { 369 struct tegra_pcib_softc *sc; 370 bus_space_handle_t hndl; 371 uint32_t off; 372 uint32_t val; 373 int rv, i; 374 375 sc = device_get_softc(dev); 376 if (bus == 0) { 377 if (func != 0) 378 return (0xFFFFFFFF); 379 for (i = 0; i < TEGRA_PCIB_MAX_PORTS; i++) { 380 if ((sc->ports[i] != NULL) && 381 (sc->ports[i]->port_idx == slot)) { 382 hndl = sc->ports[i]->cfg_handle; 383 off = reg & 0xFFF; 384 break; 385 } 386 } 387 if (i >= TEGRA_PCIB_MAX_PORTS) 388 return (0xFFFFFFFF); 389 } else { 390 rv = tegra_pcbib_map_cfg(sc, bus, slot, func, reg); 391 if (rv != 0) 392 return (0xFFFFFFFF); 393 hndl = sc->cfg_handle; 394 off = PCI_CFG_BASE_REG(reg); 395 } 396 397 val = bus_space_read_4(sc->bus_tag, hndl, off & ~3); 398 switch (bytes) { 399 case 4: 400 break; 401 case 2: 402 if (off & 3) 403 val >>= 16; 404 val &= 0xffff; 405 break; 406 case 1: 407 val >>= ((off & 3) << 3); 408 val &= 0xff; 409 break; 410 } 411 return val; 412 } 413 414 static void 415 tegra_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, 416 u_int reg, uint32_t val, int bytes) 417 { 418 struct tegra_pcib_softc *sc; 419 bus_space_handle_t hndl; 420 uint32_t off; 421 uint32_t val2; 422 int rv, i; 423 424 sc = device_get_softc(dev); 425 if (bus == 0) { 426 if (func != 0) 427 return; 428 for (i = 0; i < TEGRA_PCIB_MAX_PORTS; i++) { 429 if ((sc->ports[i] != NULL) && 430 (sc->ports[i]->port_idx == slot)) { 431 hndl = sc->ports[i]->cfg_handle; 432 off = reg & 0xFFF; 433 break; 434 } 435 } 436 if (i >= TEGRA_PCIB_MAX_PORTS) 437 return; 438 } else { 439 rv = tegra_pcbib_map_cfg(sc, bus, slot, func, reg); 440 if (rv != 0) 441 return; 442 hndl = sc->cfg_handle; 443 off = PCI_CFG_BASE_REG(reg); 444 } 445 446 switch (bytes) { 447 case 4: 448 bus_space_write_4(sc->bus_tag, hndl, off, val); 449 break; 450 case 2: 451 val2 = bus_space_read_4(sc->bus_tag, hndl, off & ~3); 452 val2 &= ~(0xffff << ((off & 3) << 3)); 453 val2 |= ((val & 0xffff) << ((off & 3) << 3)); 454 bus_space_write_4(sc->bus_tag, hndl, off & ~3, val2); 455 break; 456 case 1: 457 val2 = bus_space_read_4(sc->bus_tag, hndl, off & ~3); 458 val2 &= ~(0xff << ((off & 3) << 3)); 459 val2 |= ((val & 0xff) << ((off & 3) << 3)); 460 bus_space_write_4(sc->bus_tag, hndl, off & ~3, val2); 461 break; 462 } 463 } 464 465 static int tegra_pci_intr(void *arg) 466 { 467 struct tegra_pcib_softc *sc = arg; 468 uint32_t code, signature; 469 470 code = bus_read_4(sc->afi_mem_res, AFI_INTR_CODE) & AFI_INTR_CODE_MASK; 471 signature = bus_read_4(sc->afi_mem_res, AFI_INTR_SIGNATURE); 472 bus_write_4(sc->afi_mem_res, AFI_INTR_CODE, 0); 473 if (code == AFI_INTR_CODE_INT_CODE_SM_MSG) 474 return(FILTER_STRAY); 475 476 printf("tegra_pci_intr: code %x sig %x\n", code, signature); 477 return (FILTER_HANDLED); 478 } 479 480 /* ----------------------------------------------------------------------- 481 * 482 * PCI MSI interface 483 */ 484 static int 485 tegra_pcib_alloc_msi(device_t pci, device_t child, int count, int maxcount, 486 int *irqs) 487 { 488 phandle_t msi_parent; 489 490 /* XXXX ofw_bus_msimap() don't works for Tegra DT. 491 ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), &msi_parent, 492 NULL); 493 */ 494 msi_parent = OF_xref_from_node(ofw_bus_get_node(pci)); 495 return (intr_alloc_msi(pci, child, msi_parent, count, maxcount, 496 irqs)); 497 } 498 499 static int 500 tegra_pcib_release_msi(device_t pci, device_t child, int count, int *irqs) 501 { 502 phandle_t msi_parent; 503 504 /* XXXX ofw_bus_msimap() don't works for Tegra DT. 505 ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), &msi_parent, 506 NULL); 507 */ 508 msi_parent = OF_xref_from_node(ofw_bus_get_node(pci)); 509 return (intr_release_msi(pci, child, msi_parent, count, irqs)); 510 } 511 512 static int 513 tegra_pcib_map_msi(device_t pci, device_t child, int irq, uint64_t *addr, 514 uint32_t *data) 515 { 516 phandle_t msi_parent; 517 518 /* XXXX ofw_bus_msimap() don't works for Tegra DT. 519 ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child), &msi_parent, 520 NULL); 521 */ 522 msi_parent = OF_xref_from_node(ofw_bus_get_node(pci)); 523 return (intr_map_msi(pci, child, msi_parent, irq, addr, data)); 524 } 525 526 #ifdef TEGRA_PCIB_MSI_ENABLE 527 528 /* -------------------------------------------------------------------------- 529 * 530 * Interrupts 531 * 532 */ 533 534 static inline void 535 tegra_pcib_isrc_mask(struct tegra_pcib_softc *sc, 536 struct tegra_pcib_irqsrc *tgi, uint32_t val) 537 { 538 uint32_t reg; 539 int offs, bit; 540 541 offs = tgi->irq / AFI_MSI_INTR_IN_REG; 542 bit = 1 << (tgi->irq % AFI_MSI_INTR_IN_REG); 543 544 if (val != 0) 545 AFI_WR4(sc, AFI_MSI_VEC(offs), bit); 546 reg = AFI_RD4(sc, AFI_MSI_EN_VEC(offs)); 547 if (val != 0) 548 reg |= bit; 549 else 550 reg &= ~bit; 551 AFI_WR4(sc, AFI_MSI_EN_VEC(offs), reg); 552 } 553 554 static int 555 tegra_pcib_msi_intr(void *arg) 556 { 557 u_int irq, i, bit, reg; 558 struct tegra_pcib_softc *sc; 559 struct trapframe *tf; 560 struct tegra_pcib_irqsrc *tgi; 561 562 sc = (struct tegra_pcib_softc *)arg; 563 tf = curthread->td_intr_frame; 564 565 for (i = 0; i < AFI_MSI_REGS; i++) { 566 reg = AFI_RD4(sc, AFI_MSI_VEC(i)); 567 /* Handle one vector. */ 568 while (reg != 0) { 569 bit = ffs(reg) - 1; 570 /* Send EOI */ 571 AFI_WR4(sc, AFI_MSI_VEC(i), 1 << bit); 572 irq = i * AFI_MSI_INTR_IN_REG + bit; 573 tgi = &sc->isrcs[irq]; 574 if (intr_isrc_dispatch(&tgi->isrc, tf) != 0) { 575 /* Disable stray. */ 576 tegra_pcib_isrc_mask(sc, tgi, 0); 577 device_printf(sc->dev, 578 "Stray irq %u disabled\n", irq); 579 } 580 reg = AFI_RD4(sc, AFI_MSI_VEC(i)); 581 } 582 } 583 return (FILTER_HANDLED); 584 } 585 586 static int 587 tegra_pcib_msi_attach(struct tegra_pcib_softc *sc) 588 { 589 int error; 590 uint32_t irq; 591 const char *name; 592 593 sc->isrcs = malloc(sizeof(*sc->isrcs) * TEGRA_PCIB_MAX_MSI, M_DEVBUF, 594 M_WAITOK | M_ZERO); 595 596 name = device_get_nameunit(sc->dev); 597 for (irq = 0; irq < TEGRA_PCIB_MAX_MSI; irq++) { 598 sc->isrcs[irq].irq = irq; 599 error = intr_isrc_register(&sc->isrcs[irq].isrc, 600 sc->dev, 0, "%s,%u", name, irq); 601 if (error != 0) 602 return (error); /* XXX deregister ISRCs */ 603 } 604 if (intr_msi_register(sc->dev, 605 OF_xref_from_node(ofw_bus_get_node(sc->dev))) != 0) 606 return (ENXIO); 607 608 return (0); 609 } 610 611 static int 612 tegra_pcib_msi_detach(struct tegra_pcib_softc *sc) 613 { 614 615 /* 616 * There has not been established any procedure yet 617 * how to detach PIC from living system correctly. 618 */ 619 device_printf(sc->dev, "%s: not implemented yet\n", __func__); 620 return (EBUSY); 621 } 622 623 624 static void 625 tegra_pcib_msi_disable_intr(device_t dev, struct intr_irqsrc *isrc) 626 { 627 struct tegra_pcib_softc *sc; 628 struct tegra_pcib_irqsrc *tgi; 629 630 sc = device_get_softc(dev); 631 tgi = (struct tegra_pcib_irqsrc *)isrc; 632 tegra_pcib_isrc_mask(sc, tgi, 0); 633 } 634 635 static void 636 tegra_pcib_msi_enable_intr(device_t dev, struct intr_irqsrc *isrc) 637 { 638 struct tegra_pcib_softc *sc; 639 struct tegra_pcib_irqsrc *tgi; 640 641 sc = device_get_softc(dev); 642 tgi = (struct tegra_pcib_irqsrc *)isrc; 643 tegra_pcib_isrc_mask(sc, tgi, 1); 644 } 645 646 /* MSI interrupts are edge trigered -> do nothing */ 647 static void 648 tegra_pcib_msi_post_filter(device_t dev, struct intr_irqsrc *isrc) 649 { 650 } 651 652 static void 653 tegra_pcib_msi_post_ithread(device_t dev, struct intr_irqsrc *isrc) 654 { 655 } 656 657 static void 658 tegra_pcib_msi_pre_ithread(device_t dev, struct intr_irqsrc *isrc) 659 { 660 } 661 662 static int 663 tegra_pcib_msi_setup_intr(device_t dev, struct intr_irqsrc *isrc, 664 struct resource *res, struct intr_map_data *data) 665 { 666 struct tegra_pcib_softc *sc; 667 struct tegra_pcib_irqsrc *tgi; 668 669 sc = device_get_softc(dev); 670 tgi = (struct tegra_pcib_irqsrc *)isrc; 671 672 if (data == NULL || data->type != INTR_MAP_DATA_MSI) 673 return (ENOTSUP); 674 675 if (isrc->isrc_handlers == 0) 676 tegra_pcib_msi_enable_intr(dev, isrc); 677 678 return (0); 679 } 680 681 static int 682 tegra_pcib_msi_teardown_intr(device_t dev, struct intr_irqsrc *isrc, 683 struct resource *res, struct intr_map_data *data) 684 { 685 struct tegra_pcib_softc *sc; 686 struct tegra_pcib_irqsrc *tgi; 687 688 sc = device_get_softc(dev); 689 tgi = (struct tegra_pcib_irqsrc *)isrc; 690 691 if (isrc->isrc_handlers == 0) 692 tegra_pcib_isrc_mask(sc, tgi, 0); 693 return (0); 694 } 695 696 697 static int 698 tegra_pcib_msi_alloc_msi(device_t dev, device_t child, int count, int maxcount, 699 device_t *pic, struct intr_irqsrc **srcs) 700 { 701 struct tegra_pcib_softc *sc; 702 int i, irq, end_irq; 703 bool found; 704 705 KASSERT(powerof2(count), ("%s: bad count", __func__)); 706 KASSERT(powerof2(maxcount), ("%s: bad maxcount", __func__)); 707 708 sc = device_get_softc(dev); 709 mtx_lock(&sc->mtx); 710 711 found = false; 712 for (irq = 0; irq < TEGRA_PCIB_MAX_MSI && !found; irq++) { 713 /* Start on an aligned interrupt */ 714 if ((irq & (maxcount - 1)) != 0) 715 continue; 716 717 /* Assume we found a valid range until shown otherwise */ 718 found = true; 719 720 /* Check this range is valid */ 721 for (end_irq = irq; end_irq != irq + count - 1; end_irq++) { 722 /* No free interrupts */ 723 if (end_irq == (TEGRA_PCIB_MAX_MSI - 1)) { 724 found = false; 725 break; 726 } 727 728 /* This is already used */ 729 if ((sc->isrcs[irq].flags & TEGRA_FLAG_MSI_USED) == 730 TEGRA_FLAG_MSI_USED) { 731 found = false; 732 break; 733 } 734 } 735 } 736 737 /* Not enough interrupts were found */ 738 if (!found || irq == (TEGRA_PCIB_MAX_MSI - 1)) { 739 mtx_unlock(&sc->mtx); 740 return (ENXIO); 741 } 742 743 for (i = 0; i < count; i++) { 744 /* Mark the interrupt as used */ 745 sc->isrcs[irq + i].flags |= TEGRA_FLAG_MSI_USED; 746 747 } 748 mtx_unlock(&sc->mtx); 749 750 for (i = 0; i < count; i++) 751 srcs[i] = (struct intr_irqsrc *)&sc->isrcs[irq + i]; 752 *pic = device_get_parent(dev); 753 return (0); 754 } 755 756 static int 757 tegra_pcib_msi_release_msi(device_t dev, device_t child, int count, 758 struct intr_irqsrc **isrc) 759 { 760 struct tegra_pcib_softc *sc; 761 struct tegra_pcib_irqsrc *ti; 762 int i; 763 764 sc = device_get_softc(dev); 765 mtx_lock(&sc->mtx); 766 for (i = 0; i < count; i++) { 767 ti = (struct tegra_pcib_irqsrc *)isrc; 768 769 KASSERT((ti->flags & TEGRA_FLAG_MSI_USED) == TEGRA_FLAG_MSI_USED, 770 ("%s: Trying to release an unused MSI-X interrupt", 771 __func__)); 772 773 ti->flags &= ~TEGRA_FLAG_MSI_USED; 774 mtx_unlock(&sc->mtx); 775 } 776 return (0); 777 } 778 779 static int 780 tegra_pcib_msi_map_msi(device_t dev, device_t child, struct intr_irqsrc *isrc, 781 uint64_t *addr, uint32_t *data) 782 { 783 struct tegra_pcib_softc *sc = device_get_softc(dev); 784 struct tegra_pcib_irqsrc *ti = (struct tegra_pcib_irqsrc *)isrc; 785 786 *addr = vtophys(sc->msi_page); 787 *data = ti->irq; 788 return (0); 789 } 790 #endif 791 792 /* ------------------------------------------------------------------- */ 793 static bus_size_t 794 tegra_pcib_pex_ctrl(struct tegra_pcib_softc *sc, int port) 795 { 796 if (port >= TEGRA_PCIB_MAX_PORTS) 797 panic("invalid port number: %d\n", port); 798 799 if (port == 0) 800 return (AFI_PEX0_CTRL); 801 else if (port == 1) 802 return (AFI_PEX1_CTRL); 803 else if (port == 2) 804 return (AFI_PEX2_CTRL); 805 else 806 panic("invalid port number: %d\n", port); 807 } 808 809 static int 810 tegra_pcib_enable_fdt_resources(struct tegra_pcib_softc *sc) 811 { 812 int rv; 813 814 rv = hwreset_assert(sc->hwreset_pcie_x); 815 if (rv != 0) { 816 device_printf(sc->dev, "Cannot assert 'pcie_x' reset\n"); 817 return (rv); 818 } 819 rv = hwreset_assert(sc->hwreset_afi); 820 if (rv != 0) { 821 device_printf(sc->dev, "Cannot assert 'afi' reset\n"); 822 return (rv); 823 } 824 rv = hwreset_assert(sc->hwreset_pex); 825 if (rv != 0) { 826 device_printf(sc->dev, "Cannot assert 'pex' reset\n"); 827 return (rv); 828 } 829 830 tegra_powergate_power_off(TEGRA_POWERGATE_PCX); 831 832 /* Power supplies. */ 833 rv = regulator_enable(sc->supply_avddio_pex); 834 if (rv != 0) { 835 device_printf(sc->dev, 836 "Cannot enable 'avddio_pex' regulator\n"); 837 return (rv); 838 } 839 rv = regulator_enable(sc->supply_dvddio_pex); 840 if (rv != 0) { 841 device_printf(sc->dev, 842 "Cannot enable 'dvddio_pex' regulator\n"); 843 return (rv); 844 } 845 rv = regulator_enable(sc->supply_avdd_pex_pll); 846 if (rv != 0) { 847 device_printf(sc->dev, 848 "Cannot enable 'avdd-pex-pll' regulator\n"); 849 return (rv); 850 } 851 rv = regulator_enable(sc->supply_hvdd_pex); 852 if (rv != 0) { 853 device_printf(sc->dev, 854 "Cannot enable 'hvdd-pex-supply' regulator\n"); 855 return (rv); 856 } 857 rv = regulator_enable(sc->supply_hvdd_pex_pll_e); 858 if (rv != 0) { 859 device_printf(sc->dev, 860 "Cannot enable 'hvdd-pex-pll-e-supply' regulator\n"); 861 return (rv); 862 } 863 rv = regulator_enable(sc->supply_vddio_pex_ctl); 864 if (rv != 0) { 865 device_printf(sc->dev, 866 "Cannot enable 'vddio-pex-ctl' regulator\n"); 867 return (rv); 868 } 869 rv = regulator_enable(sc->supply_avdd_pll_erefe); 870 if (rv != 0) { 871 device_printf(sc->dev, 872 "Cannot enable 'avdd-pll-erefe-supply' regulator\n"); 873 return (rv); 874 } 875 876 rv = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_PCX, 877 sc->clk_pex, sc->hwreset_pex); 878 if (rv != 0) { 879 device_printf(sc->dev, "Cannot enable 'PCX' powergate\n"); 880 return (rv); 881 } 882 883 rv = hwreset_deassert(sc->hwreset_afi); 884 if (rv != 0) { 885 device_printf(sc->dev, "Cannot unreset 'afi' reset\n"); 886 return (rv); 887 } 888 889 rv = clk_enable(sc->clk_afi); 890 if (rv != 0) { 891 device_printf(sc->dev, "Cannot enable 'afi' clock\n"); 892 return (rv); 893 } 894 rv = clk_enable(sc->clk_cml); 895 if (rv != 0) { 896 device_printf(sc->dev, "Cannot enable 'cml' clock\n"); 897 return (rv); 898 } 899 rv = clk_enable(sc->clk_pll_e); 900 if (rv != 0) { 901 device_printf(sc->dev, "Cannot enable 'pll_e' clock\n"); 902 return (rv); 903 } 904 return (0); 905 } 906 907 static struct tegra_pcib_port * 908 tegra_pcib_parse_port(struct tegra_pcib_softc *sc, phandle_t node) 909 { 910 struct tegra_pcib_port *port; 911 uint32_t tmp[5]; 912 char tmpstr[6]; 913 int rv; 914 915 port = malloc(sizeof(struct tegra_pcib_port), M_DEVBUF, M_WAITOK); 916 917 rv = OF_getprop(node, "status", tmpstr, sizeof(tmpstr)); 918 if (rv <= 0 || strcmp(tmpstr, "okay") == 0 || 919 strcmp(tmpstr, "ok") == 0) 920 port->enabled = 1; 921 else 922 port->enabled = 0; 923 924 rv = OF_getencprop(node, "assigned-addresses", tmp, sizeof(tmp)); 925 if (rv != sizeof(tmp)) { 926 device_printf(sc->dev, "Cannot parse assigned-address: %d\n", 927 rv); 928 goto fail; 929 } 930 port->rp_base_addr = tmp[2]; 931 port->rp_size = tmp[4]; 932 port->port_idx = OFW_PCI_PHYS_HI_DEVICE(tmp[0]) - 1; 933 if (port->port_idx >= TEGRA_PCIB_MAX_PORTS) { 934 device_printf(sc->dev, "Invalid port index: %d\n", 935 port->port_idx); 936 goto fail; 937 } 938 /* XXX - TODO: 939 * Implement proper function for parsing pci "reg" property: 940 * - it have PCI bus format 941 * - its relative to matching "assigned-addresses" 942 */ 943 rv = OF_getencprop(node, "reg", tmp, sizeof(tmp)); 944 if (rv != sizeof(tmp)) { 945 device_printf(sc->dev, "Cannot parse reg: %d\n", rv); 946 goto fail; 947 } 948 port->rp_base_addr += tmp[2]; 949 950 rv = OF_getencprop(node, "nvidia,num-lanes", &port->num_lanes, 951 sizeof(port->num_lanes)); 952 if (rv != sizeof(port->num_lanes)) { 953 device_printf(sc->dev, "Cannot parse nvidia,num-lanes: %d\n", 954 rv); 955 goto fail; 956 } 957 if (port->num_lanes > 4) { 958 device_printf(sc->dev, "Invalid nvidia,num-lanes: %d\n", 959 port->num_lanes); 960 goto fail; 961 } 962 963 port->afi_pex_ctrl = tegra_pcib_pex_ctrl(sc, port->port_idx); 964 sc->lanes_cfg |= port->num_lanes << (4 * port->port_idx); 965 966 return (port); 967 fail: 968 free(port, M_DEVBUF); 969 return (NULL); 970 } 971 972 973 static int 974 tegra_pcib_parse_fdt_resources(struct tegra_pcib_softc *sc, phandle_t node) 975 { 976 phandle_t child; 977 struct tegra_pcib_port *port; 978 int rv; 979 980 /* Power supplies. */ 981 rv = regulator_get_by_ofw_property(sc->dev, 0, "avddio-pex-supply", 982 &sc->supply_avddio_pex); 983 if (rv != 0) { 984 device_printf(sc->dev, 985 "Cannot get 'avddio-pex' regulator\n"); 986 return (ENXIO); 987 } 988 rv = regulator_get_by_ofw_property(sc->dev, 0, "dvddio-pex-supply", 989 &sc->supply_dvddio_pex); 990 if (rv != 0) { 991 device_printf(sc->dev, 992 "Cannot get 'dvddio-pex' regulator\n"); 993 return (ENXIO); 994 } 995 rv = regulator_get_by_ofw_property(sc->dev, 0, "avdd-pex-pll-supply", 996 &sc->supply_avdd_pex_pll); 997 if (rv != 0) { 998 device_printf(sc->dev, 999 "Cannot get 'avdd-pex-pll' regulator\n"); 1000 return (ENXIO); 1001 } 1002 rv = regulator_get_by_ofw_property(sc->dev, 0, "hvdd-pex-supply", 1003 &sc->supply_hvdd_pex); 1004 if (rv != 0) { 1005 device_printf(sc->dev, 1006 "Cannot get 'hvdd-pex' regulator\n"); 1007 return (ENXIO); 1008 } 1009 rv = regulator_get_by_ofw_property(sc->dev, 0, "hvdd-pex-pll-e-supply", 1010 &sc->supply_hvdd_pex_pll_e); 1011 if (rv != 0) { 1012 device_printf(sc->dev, 1013 "Cannot get 'hvdd-pex-pll-e' regulator\n"); 1014 return (ENXIO); 1015 } 1016 rv = regulator_get_by_ofw_property(sc->dev, 0, "vddio-pex-ctl-supply", 1017 &sc->supply_vddio_pex_ctl); 1018 if (rv != 0) { 1019 device_printf(sc->dev, 1020 "Cannot get 'vddio-pex-ctl' regulator\n"); 1021 return (ENXIO); 1022 } 1023 rv = regulator_get_by_ofw_property(sc->dev, 0, "avdd-pll-erefe-supply", 1024 &sc->supply_avdd_pll_erefe); 1025 if (rv != 0) { 1026 device_printf(sc->dev, 1027 "Cannot get 'avdd-pll-erefe' regulator\n"); 1028 return (ENXIO); 1029 } 1030 1031 /* Resets. */ 1032 rv = hwreset_get_by_ofw_name(sc->dev, 0, "pex", &sc->hwreset_pex); 1033 if (rv != 0) { 1034 device_printf(sc->dev, "Cannot get 'pex' reset\n"); 1035 return (ENXIO); 1036 } 1037 rv = hwreset_get_by_ofw_name(sc->dev, 0, "afi", &sc->hwreset_afi); 1038 if (rv != 0) { 1039 device_printf(sc->dev, "Cannot get 'afi' reset\n"); 1040 return (ENXIO); 1041 } 1042 rv = hwreset_get_by_ofw_name(sc->dev, 0, "pcie_x", &sc->hwreset_pcie_x); 1043 if (rv != 0) { 1044 device_printf(sc->dev, "Cannot get 'pcie_x' reset\n"); 1045 return (ENXIO); 1046 } 1047 1048 /* Clocks. */ 1049 rv = clk_get_by_ofw_name(sc->dev, 0, "pex", &sc->clk_pex); 1050 if (rv != 0) { 1051 device_printf(sc->dev, "Cannot get 'pex' clock\n"); 1052 return (ENXIO); 1053 } 1054 rv = clk_get_by_ofw_name(sc->dev, 0, "afi", &sc->clk_afi); 1055 if (rv != 0) { 1056 device_printf(sc->dev, "Cannot get 'afi' clock\n"); 1057 return (ENXIO); 1058 } 1059 rv = clk_get_by_ofw_name(sc->dev, 0, "pll_e", &sc->clk_pll_e); 1060 if (rv != 0) { 1061 device_printf(sc->dev, "Cannot get 'pll_e' clock\n"); 1062 return (ENXIO); 1063 } 1064 rv = clk_get_by_ofw_name(sc->dev, 0, "cml", &sc->clk_cml); 1065 if (rv != 0) { 1066 device_printf(sc->dev, "Cannot get 'cml' clock\n"); 1067 return (ENXIO); 1068 } 1069 1070 /* Phy. */ 1071 rv = phy_get_by_ofw_name(sc->dev, 0, "pcie", &sc->phy); 1072 if (rv != 0) { 1073 device_printf(sc->dev, "Cannot get 'pcie' phy\n"); 1074 return (ENXIO); 1075 } 1076 1077 /* Ports */ 1078 sc->num_ports = 0; 1079 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 1080 port = tegra_pcib_parse_port(sc, child); 1081 if (port == NULL) { 1082 device_printf(sc->dev, "Cannot parse PCIe port node\n"); 1083 return (ENXIO); 1084 } 1085 sc->ports[sc->num_ports++] = port; 1086 } 1087 1088 return (0); 1089 } 1090 1091 static int 1092 tegra_pcib_decode_ranges(struct tegra_pcib_softc *sc, 1093 struct ofw_pci_range *ranges, int nranges) 1094 { 1095 int i; 1096 1097 for (i = 2; i < nranges; i++) { 1098 if ((ranges[i].pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) == 1099 OFW_PCI_PHYS_HI_SPACE_IO) { 1100 if (sc->io_range.size != 0) { 1101 device_printf(sc->dev, 1102 "Duplicated IO range found in DT\n"); 1103 return (ENXIO); 1104 } 1105 sc->io_range = ranges[i]; 1106 } 1107 if (((ranges[i].pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) == 1108 OFW_PCI_PHYS_HI_SPACE_MEM32)) { 1109 if (ranges[i].pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) { 1110 if (sc->pref_mem_range.size != 0) { 1111 device_printf(sc->dev, 1112 "Duplicated memory range found " 1113 "in DT\n"); 1114 return (ENXIO); 1115 } 1116 sc->pref_mem_range = ranges[i]; 1117 } else { 1118 if (sc->mem_range.size != 0) { 1119 device_printf(sc->dev, 1120 "Duplicated memory range found " 1121 "in DT\n"); 1122 return (ENXIO); 1123 } 1124 sc->mem_range = ranges[i]; 1125 } 1126 } 1127 } 1128 if ((sc->io_range.size == 0) || (sc->mem_range.size == 0) 1129 || (sc->pref_mem_range.size == 0)) { 1130 device_printf(sc->dev, 1131 " Not all required ranges are found in DT\n"); 1132 return (ENXIO); 1133 } 1134 return (0); 1135 } 1136 1137 /* 1138 * Hardware config. 1139 */ 1140 static int 1141 tegra_pcib_wait_for_link(struct tegra_pcib_softc *sc, 1142 struct tegra_pcib_port *port) 1143 { 1144 uint32_t reg; 1145 int i; 1146 1147 1148 /* Setup link detection. */ 1149 reg = tegra_pcib_read_config(sc->dev, 0, port->port_idx, 0, 1150 RP_PRIV_MISC, 4); 1151 reg &= ~RP_PRIV_MISC_PRSNT_MAP_EP_ABSNT; 1152 reg |= RP_PRIV_MISC_PRSNT_MAP_EP_PRSNT; 1153 tegra_pcib_write_config(sc->dev, 0, port->port_idx, 0, 1154 RP_PRIV_MISC, reg, 4); 1155 1156 for (i = TEGRA_PCIE_LINKUP_TIMEOUT; i > 0; i--) { 1157 reg = tegra_pcib_read_config(sc->dev, 0, port->port_idx, 0, 1158 RP_VEND_XP, 4); 1159 if (reg & RP_VEND_XP_DL_UP) 1160 break; 1161 1162 } 1163 if (i <= 0) 1164 return (ETIMEDOUT); 1165 1166 for (i = TEGRA_PCIE_LINKUP_TIMEOUT; i > 0; i--) { 1167 reg = tegra_pcib_read_config(sc->dev, 0, port->port_idx, 0, 1168 RP_LINK_CONTROL_STATUS, 4); 1169 if (reg & RP_LINK_CONTROL_STATUS_DL_LINK_ACTIVE) 1170 break; 1171 1172 } 1173 if (i <= 0) 1174 return (ETIMEDOUT); 1175 return (0); 1176 } 1177 1178 static void 1179 tegra_pcib_port_enable(struct tegra_pcib_softc *sc, int port_num) 1180 { 1181 struct tegra_pcib_port *port; 1182 uint32_t reg; 1183 int rv; 1184 1185 port = sc->ports[port_num]; 1186 1187 /* Put port to reset. */ 1188 reg = AFI_RD4(sc, port->afi_pex_ctrl); 1189 reg &= ~AFI_PEX_CTRL_RST_L; 1190 AFI_WR4(sc, port->afi_pex_ctrl, reg); 1191 AFI_RD4(sc, port->afi_pex_ctrl); 1192 DELAY(10); 1193 1194 /* Enable clocks. */ 1195 reg |= AFI_PEX_CTRL_REFCLK_EN; 1196 reg |= AFI_PEX_CTRL_CLKREQ_EN; 1197 reg |= AFI_PEX_CTRL_OVERRIDE_EN; 1198 AFI_WR4(sc, port->afi_pex_ctrl, reg); 1199 AFI_RD4(sc, port->afi_pex_ctrl); 1200 DELAY(100); 1201 1202 /* Release reset. */ 1203 reg |= AFI_PEX_CTRL_RST_L; 1204 AFI_WR4(sc, port->afi_pex_ctrl, reg); 1205 1206 rv = tegra_pcib_wait_for_link(sc, port); 1207 if (bootverbose) 1208 device_printf(sc->dev, " port %d (%d lane%s): Link is %s\n", 1209 port->port_idx, port->num_lanes, 1210 port->num_lanes > 1 ? "s": "", 1211 rv == 0 ? "up": "down"); 1212 } 1213 1214 1215 static void 1216 tegra_pcib_port_disable(struct tegra_pcib_softc *sc, uint32_t port_num) 1217 { 1218 struct tegra_pcib_port *port; 1219 uint32_t reg; 1220 1221 port = sc->ports[port_num]; 1222 1223 /* Put port to reset. */ 1224 reg = AFI_RD4(sc, port->afi_pex_ctrl); 1225 reg &= ~AFI_PEX_CTRL_RST_L; 1226 AFI_WR4(sc, port->afi_pex_ctrl, reg); 1227 AFI_RD4(sc, port->afi_pex_ctrl); 1228 DELAY(10); 1229 1230 /* Disable clocks. */ 1231 reg &= ~AFI_PEX_CTRL_CLKREQ_EN; 1232 reg &= ~AFI_PEX_CTRL_REFCLK_EN; 1233 AFI_WR4(sc, port->afi_pex_ctrl, reg); 1234 1235 if (bootverbose) 1236 device_printf(sc->dev, " port %d (%d lane%s): Disabled\n", 1237 port->port_idx, port->num_lanes, 1238 port->num_lanes > 1 ? "s": ""); 1239 } 1240 1241 static void 1242 tegra_pcib_set_bar(struct tegra_pcib_softc *sc, int bar, uint32_t axi, 1243 uint64_t fpci, uint32_t size, int is_memory) 1244 { 1245 uint32_t fpci_reg; 1246 uint32_t axi_reg; 1247 uint32_t size_reg; 1248 1249 axi_reg = axi & ~0xFFF; 1250 size_reg = size >> 12; 1251 fpci_reg = (uint32_t)(fpci >> 8) & ~0xF; 1252 fpci_reg |= is_memory ? 0x1 : 0x0; 1253 AFI_WR4(sc, bars[bar].axi_start, axi_reg); 1254 AFI_WR4(sc, bars[bar].size, size_reg); 1255 AFI_WR4(sc, bars[bar].fpci_start, fpci_reg); 1256 } 1257 1258 static int 1259 tegra_pcib_enable(struct tegra_pcib_softc *sc) 1260 { 1261 int rv; 1262 int i; 1263 uint32_t reg; 1264 1265 rv = tegra_pcib_enable_fdt_resources(sc); 1266 if (rv != 0) { 1267 device_printf(sc->dev, "Cannot enable FDT resources\n"); 1268 return (rv); 1269 } 1270 /* Enable PLLE control. */ 1271 reg = AFI_RD4(sc, AFI_PLLE_CONTROL); 1272 reg &= ~AFI_PLLE_CONTROL_BYPASS_PADS2PLLE_CONTROL; 1273 reg |= AFI_PLLE_CONTROL_PADS2PLLE_CONTROL_EN; 1274 AFI_WR4(sc, AFI_PLLE_CONTROL, reg); 1275 1276 /* Set bias pad. */ 1277 AFI_WR4(sc, AFI_PEXBIAS_CTRL, 0); 1278 1279 /* Configure mode and ports. */ 1280 reg = AFI_RD4(sc, AFI_PCIE_CONFIG); 1281 reg &= ~AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_MASK; 1282 if (sc->lanes_cfg == 0x14) { 1283 if (bootverbose) 1284 device_printf(sc->dev, 1285 "Using x1,x4 configuration\n"); 1286 reg |= AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_XBAR4_1; 1287 } else if (sc->lanes_cfg == 0x12) { 1288 if (bootverbose) 1289 device_printf(sc->dev, 1290 "Using x1,x2 configuration\n"); 1291 reg |= AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_XBAR2_1; 1292 } else { 1293 device_printf(sc->dev, 1294 "Unsupported lanes configuration: 0x%X\n", sc->lanes_cfg); 1295 } 1296 reg |= AFI_PCIE_CONFIG_PCIE_DISABLE_ALL; 1297 for (i = 0; i < TEGRA_PCIB_MAX_PORTS; i++) { 1298 if ((sc->ports[i] != NULL)) 1299 reg &= 1300 ~AFI_PCIE_CONFIG_PCIE_DISABLE(sc->ports[i]->port_idx); 1301 } 1302 AFI_WR4(sc, AFI_PCIE_CONFIG, reg); 1303 1304 /* Enable Gen2 support. */ 1305 reg = AFI_RD4(sc, AFI_FUSE); 1306 reg &= ~AFI_FUSE_PCIE_T0_GEN2_DIS; 1307 AFI_WR4(sc, AFI_FUSE, reg); 1308 1309 /* Enable PCIe phy. */ 1310 rv = phy_enable(sc->dev, sc->phy); 1311 if (rv != 0) { 1312 device_printf(sc->dev, "Cannot enable phy\n"); 1313 return (rv); 1314 } 1315 1316 rv = hwreset_deassert(sc->hwreset_pcie_x); 1317 if (rv != 0) { 1318 device_printf(sc->dev, "Cannot unreset 'pci_x' reset\n"); 1319 return (rv); 1320 } 1321 1322 /* Enable config space. */ 1323 reg = AFI_RD4(sc, AFI_CONFIGURATION); 1324 reg |= AFI_CONFIGURATION_EN_FPCI; 1325 AFI_WR4(sc, AFI_CONFIGURATION, reg); 1326 1327 /* Enable AFI errors. */ 1328 reg = 0; 1329 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_INI_SLVERR); 1330 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_INI_DECERR); 1331 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_TGT_SLVERR); 1332 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_TGT_DECERR); 1333 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_TGT_WRERR); 1334 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_SM_MSG); 1335 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_DFPCI_DECERR); 1336 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_AXI_DECERR); 1337 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_FPCI_TIMEOUT); 1338 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_PE_PRSNT_SENSE); 1339 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_PE_CLKREQ_SENSE); 1340 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_CLKCLAMP_SENSE); 1341 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_RDY4PD_SENSE); 1342 reg |= AFI_AFI_INTR_ENABLE_CODE(AFI_INTR_CODE_INT_CODE_P2P_ERROR); 1343 AFI_WR4(sc, AFI_AFI_INTR_ENABLE, reg); 1344 AFI_WR4(sc, AFI_SM_INTR_ENABLE, 0xffffffff); 1345 1346 /* Enable INT, disable MSI. */ 1347 AFI_WR4(sc, AFI_INTR_MASK, AFI_INTR_MASK_INT_MASK); 1348 1349 /* Mask all FPCI errors. */ 1350 AFI_WR4(sc, AFI_FPCI_ERROR_MASKS, 0); 1351 1352 /* Setup AFI translation windows. */ 1353 /* BAR 0 - type 1 extended configuration. */ 1354 tegra_pcib_set_bar(sc, 0, rman_get_start(sc->cfg_mem_res), 1355 FPCI_MAP_EXT_TYPE1_CONFIG, rman_get_size(sc->cfg_mem_res), 0); 1356 1357 /* BAR 1 - downstream I/O. */ 1358 tegra_pcib_set_bar(sc, 1, sc->io_range.host, FPCI_MAP_IO, 1359 sc->io_range.size, 0); 1360 1361 /* BAR 2 - downstream prefetchable memory 1:1. */ 1362 tegra_pcib_set_bar(sc, 2, sc->pref_mem_range.host, 1363 sc->pref_mem_range.host, sc->pref_mem_range.size, 1); 1364 1365 /* BAR 3 - downstream not prefetchable memory 1:1 .*/ 1366 tegra_pcib_set_bar(sc, 3, sc->mem_range.host, 1367 sc->mem_range.host, sc->mem_range.size, 1); 1368 1369 /* BAR 3-8 clear. */ 1370 tegra_pcib_set_bar(sc, 4, 0, 0, 0, 0); 1371 tegra_pcib_set_bar(sc, 5, 0, 0, 0, 0); 1372 tegra_pcib_set_bar(sc, 6, 0, 0, 0, 0); 1373 tegra_pcib_set_bar(sc, 7, 0, 0, 0, 0); 1374 tegra_pcib_set_bar(sc, 8, 0, 0, 0, 0); 1375 1376 /* MSI BAR - clear. */ 1377 tegra_pcib_set_bar(sc, 9, 0, 0, 0, 0); 1378 return(0); 1379 } 1380 1381 #ifdef TEGRA_PCIB_MSI_ENABLE 1382 static int 1383 tegra_pcib_attach_msi(device_t dev) 1384 { 1385 struct tegra_pcib_softc *sc; 1386 uint32_t reg; 1387 int i, rv; 1388 1389 sc = device_get_softc(dev); 1390 1391 sc->msi_page = kmem_alloc_contig(kernel_arena, PAGE_SIZE, M_WAITOK, 1392 0, BUS_SPACE_MAXADDR, PAGE_SIZE, 0, VM_MEMATTR_DEFAULT); 1393 1394 /* MSI BAR */ 1395 tegra_pcib_set_bar(sc, 9, vtophys(sc->msi_page), vtophys(sc->msi_page), 1396 PAGE_SIZE, 0); 1397 1398 /* Disble and clear all interrupts. */ 1399 for (i = 0; i < AFI_MSI_REGS; i++) { 1400 AFI_WR4(sc, AFI_MSI_EN_VEC(i), 0); 1401 AFI_WR4(sc, AFI_MSI_VEC(i), 0xFFFFFFFF); 1402 } 1403 rv = bus_setup_intr(dev, sc->msi_irq_res, INTR_TYPE_BIO | INTR_MPSAFE, 1404 tegra_pcib_msi_intr, NULL, sc, &sc->msi_intr_cookie); 1405 if (rv != 0) { 1406 device_printf(dev, "cannot setup MSI interrupt handler\n"); 1407 rv = ENXIO; 1408 goto out; 1409 } 1410 1411 if (tegra_pcib_msi_attach(sc) != 0) { 1412 device_printf(dev, "WARNING: unable to attach PIC\n"); 1413 tegra_pcib_msi_detach(sc); 1414 goto out; 1415 } 1416 1417 /* Unmask MSI interrupt. */ 1418 reg = AFI_RD4(sc, AFI_INTR_MASK); 1419 reg |= AFI_INTR_MASK_MSI_MASK; 1420 AFI_WR4(sc, AFI_INTR_MASK, reg); 1421 1422 out: 1423 return (rv); 1424 } 1425 #endif 1426 1427 static int 1428 tegra_pcib_probe(device_t dev) 1429 { 1430 if (!ofw_bus_status_okay(dev)) 1431 return (ENXIO); 1432 1433 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { 1434 device_set_desc(dev, "Nvidia Integrated PCI/PCI-E Controller"); 1435 return (BUS_PROBE_DEFAULT); 1436 } 1437 return (ENXIO); 1438 } 1439 1440 static int 1441 tegra_pcib_attach(device_t dev) 1442 { 1443 struct tegra_pcib_softc *sc; 1444 phandle_t node; 1445 int rv; 1446 int rid; 1447 struct tegra_pcib_port *port; 1448 int i; 1449 1450 sc = device_get_softc(dev); 1451 sc->dev = dev; 1452 mtx_init(&sc->mtx, "msi_mtx", NULL, MTX_DEF); 1453 1454 node = ofw_bus_get_node(dev); 1455 1456 rv = tegra_pcib_parse_fdt_resources(sc, node); 1457 if (rv != 0) { 1458 device_printf(dev, "Cannot get FDT resources\n"); 1459 return (rv); 1460 } 1461 1462 /* Allocate bus_space resources. */ 1463 rid = 0; 1464 sc->pads_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 1465 RF_ACTIVE); 1466 if (sc->pads_mem_res == NULL) { 1467 device_printf(dev, "Cannot allocate PADS register\n"); 1468 rv = ENXIO; 1469 goto out; 1470 } 1471 /* 1472 * XXX - FIXME 1473 * tag for config space is not filled when RF_ALLOCATED flag is used. 1474 */ 1475 sc->bus_tag = rman_get_bustag(sc->pads_mem_res); 1476 1477 rid = 1; 1478 sc->afi_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 1479 RF_ACTIVE); 1480 if (sc->afi_mem_res == NULL) { 1481 device_printf(dev, "Cannot allocate AFI register\n"); 1482 rv = ENXIO; 1483 goto out; 1484 } 1485 1486 rid = 2; 1487 sc->cfg_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 1488 RF_ALLOCATED); 1489 if (sc->cfg_mem_res == NULL) { 1490 device_printf(dev, "Cannot allocate config space memory\n"); 1491 rv = ENXIO; 1492 goto out; 1493 } 1494 sc->cfg_base_addr = rman_get_start(sc->cfg_mem_res); 1495 1496 1497 /* Map RP slots */ 1498 for (i = 0; i < TEGRA_PCIB_MAX_PORTS; i++) { 1499 if (sc->ports[i] == NULL) 1500 continue; 1501 port = sc->ports[i]; 1502 rv = bus_space_map(sc->bus_tag, port->rp_base_addr, 1503 port->rp_size, 0, &port->cfg_handle); 1504 if (rv != 0) { 1505 device_printf(sc->dev, "Cannot allocate memory for " 1506 "port: %d\n", i); 1507 rv = ENXIO; 1508 goto out; 1509 } 1510 } 1511 1512 /* 1513 * Get PCI interrupt 1514 */ 1515 rid = 0; 1516 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 1517 RF_ACTIVE | RF_SHAREABLE); 1518 if (sc->irq_res == NULL) { 1519 device_printf(dev, "Cannot allocate IRQ resources\n"); 1520 rv = ENXIO; 1521 goto out; 1522 } 1523 1524 rid = 1; 1525 sc->msi_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 1526 RF_ACTIVE); 1527 if (sc->irq_res == NULL) { 1528 device_printf(dev, "Cannot allocate MSI IRQ resources\n"); 1529 rv = ENXIO; 1530 goto out; 1531 } 1532 1533 sc->ofw_pci.sc_range_mask = 0x3; 1534 rv = ofw_pci_init(dev); 1535 if (rv != 0) 1536 goto out; 1537 1538 rv = tegra_pcib_decode_ranges(sc, sc->ofw_pci.sc_range, 1539 sc->ofw_pci.sc_nrange); 1540 if (rv != 0) 1541 goto out; 1542 1543 if (bus_setup_intr(dev, sc->irq_res, INTR_TYPE_BIO | INTR_MPSAFE, 1544 tegra_pci_intr, NULL, sc, &sc->intr_cookie)) { 1545 device_printf(dev, "cannot setup interrupt handler\n"); 1546 rv = ENXIO; 1547 goto out; 1548 } 1549 1550 /* 1551 * Enable PCIE device. 1552 */ 1553 rv = tegra_pcib_enable(sc); 1554 if (rv != 0) 1555 goto out; 1556 for (i = 0; i < TEGRA_PCIB_MAX_PORTS; i++) { 1557 if (sc->ports[i] == NULL) 1558 continue; 1559 if (sc->ports[i]->enabled) 1560 tegra_pcib_port_enable(sc, i); 1561 else 1562 tegra_pcib_port_disable(sc, i); 1563 } 1564 1565 #ifdef TEGRA_PCIB_MSI_ENABLE 1566 rv = tegra_pcib_attach_msi(dev); 1567 if (rv != 0) 1568 goto out; 1569 #endif 1570 device_add_child(dev, "pci", -1); 1571 1572 return (bus_generic_attach(dev)); 1573 1574 out: 1575 1576 return (rv); 1577 } 1578 1579 1580 static device_method_t tegra_pcib_methods[] = { 1581 /* Device interface */ 1582 DEVMETHOD(device_probe, tegra_pcib_probe), 1583 DEVMETHOD(device_attach, tegra_pcib_attach), 1584 1585 /* Bus interface */ 1586 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 1587 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 1588 1589 /* pcib interface */ 1590 DEVMETHOD(pcib_maxslots, tegra_pcib_maxslots), 1591 DEVMETHOD(pcib_read_config, tegra_pcib_read_config), 1592 DEVMETHOD(pcib_write_config, tegra_pcib_write_config), 1593 DEVMETHOD(pcib_route_interrupt, tegra_pcib_route_interrupt), 1594 DEVMETHOD(pcib_alloc_msi, tegra_pcib_alloc_msi), 1595 DEVMETHOD(pcib_release_msi, tegra_pcib_release_msi), 1596 DEVMETHOD(pcib_map_msi, tegra_pcib_map_msi), 1597 1598 #ifdef TEGRA_PCIB_MSI_ENABLE 1599 /* MSI/MSI-X */ 1600 DEVMETHOD(msi_alloc_msi, tegra_pcib_msi_alloc_msi), 1601 DEVMETHOD(msi_release_msi, tegra_pcib_msi_release_msi), 1602 DEVMETHOD(msi_map_msi, tegra_pcib_msi_map_msi), 1603 1604 /* Interrupt controller interface */ 1605 DEVMETHOD(pic_disable_intr, tegra_pcib_msi_disable_intr), 1606 DEVMETHOD(pic_enable_intr, tegra_pcib_msi_enable_intr), 1607 DEVMETHOD(pic_setup_intr, tegra_pcib_msi_setup_intr), 1608 DEVMETHOD(pic_teardown_intr, tegra_pcib_msi_teardown_intr), 1609 DEVMETHOD(pic_post_filter, tegra_pcib_msi_post_filter), 1610 DEVMETHOD(pic_post_ithread, tegra_pcib_msi_post_ithread), 1611 DEVMETHOD(pic_pre_ithread, tegra_pcib_msi_pre_ithread), 1612 #endif 1613 1614 /* OFW bus interface */ 1615 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 1616 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 1617 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 1618 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 1619 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 1620 1621 DEVMETHOD_END 1622 }; 1623 1624 DEFINE_CLASS_1(pcib, tegra_pcib_driver, tegra_pcib_methods, 1625 sizeof(struct tegra_pcib_softc), ofw_pci_driver); 1626 devclass_t pcib_devclass; 1627 DRIVER_MODULE(pcib, simplebus, tegra_pcib_driver, pcib_devclass, 0, 0); 1628