1 /* $NetBSD: rmixl_pcie.c,v 1.16 2021/08/07 16:18:59 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * PCI configuration support for RMI XLS SoC 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: rmixl_pcie.c,v 1.16 2021/08/07 16:18:59 thorpej Exp $"); 44 45 #include "opt_pci.h" 46 #include "pci.h" 47 48 #include <sys/cdefs.h> 49 50 #include <sys/param.h> 51 #include <sys/bus.h> 52 #include <sys/cpu.h> 53 #include <sys/device.h> 54 #include <sys/extent.h> 55 #include <sys/intr.h> 56 #include <sys/kernel.h> /* for 'hz' */ 57 #include <sys/malloc.h> 58 #include <sys/systm.h> 59 60 #include <uvm/uvm_extern.h> 61 62 #include <mips/rmi/rmixlreg.h> 63 #include <mips/rmi/rmixlvar.h> 64 #include <mips/rmi/rmixl_intr.h> 65 #include <mips/rmi/rmixl_pcievar.h> 66 67 #include <mips/rmi/rmixl_obiovar.h> 68 69 #include <dev/pci/pcivar.h> 70 #include <dev/pci/pcidevs.h> 71 #include <dev/pci/pciconf.h> 72 73 #ifdef PCI_NETBSD_CONFIGURE 74 #include <mips/cache.h> 75 #endif 76 77 #ifdef PCI_DEBUG 78 int rmixl_pcie_debug = PCI_DEBUG; 79 # define DPRINTF(x) do { if (rmixl_pcie_debug) printf x ; } while (0) 80 #else 81 # define DPRINTF(x) 82 #endif 83 84 #ifndef DDB 85 # define STATIC static 86 #else 87 # define STATIC 88 #endif 89 90 91 /* 92 * XLS PCIe Extended Configuration Registers 93 */ 94 #define RMIXL_PCIE_ECFG_UESR 0x104 /* Uncorrectable Error Status Reg */ 95 #define RMIXL_PCIE_ECFG_UEMR 0x108 /* Uncorrectable Error Mask Reg */ 96 #define RMIXL_PCIE_ECFG_UEVR 0x10c /* Uncorrectable Error seVerity Reg */ 97 #define PCIE_ECFG_UEVR_DFLT \ 98 (__BITS(18,17) | __BIT(31) | __BITS(5,4) | __BIT(0)) 99 #define PCIE_ECFG_UExR_RESV (__BITS(31,21) | __BITS(11,6) | __BITS(3,1)) 100 #define RMIXL_PCIE_ECFG_CESR 0x110 /* Correctable Error Status Reg */ 101 #define RMIXL_PCIE_ECFG_CEMR 0x114 /* Correctable Error Mask Reg */ 102 #define PCIE_ECFG_CExR_RESV (__BITS(31,14) | __BITS(11,9) | __BITS(5,1)) 103 #define RMIXL_PCIE_ECFG_ACCR 0x118 /* Adv. Capabilities Control Reg */ 104 #define RMIXL_PCIE_ECFG_HLRn(n) (0x11c + ((n) * 4)) /* Header Log Regs */ 105 #define RMIXL_PCIE_ECFG_RECR 0x12c /* Root Error Command Reg */ 106 #define PCIE_ECFG_RECR_RESV __BITS(31,3) 107 #define RMIXL_PCIE_ECFG_RESR 0x130 /* Root Error Status Reg */ 108 #define PCIE_ECFG_RESR_RESV __BITS(26,7) 109 #define RMIXL_PCIE_ECFG_ESI 0x134 /* Error Source Identification Reg */ 110 #define RMIXL_PCIE_ECFG_DSNCR 0x140 /* Dev Serial Number Capability Regs */ 111 112 static const struct { 113 u_int offset; 114 u_int32_t rw1c; 115 } pcie_ecfg_errs_tab[] = { 116 { RMIXL_PCIE_ECFG_UESR, (__BITS(20,12) | __BIT(4)) }, 117 { RMIXL_PCIE_ECFG_CESR, (__BITS(20,12) | __BIT(4)) }, 118 { RMIXL_PCIE_ECFG_HLRn(0), 0 }, 119 { RMIXL_PCIE_ECFG_HLRn(1), 0 }, 120 { RMIXL_PCIE_ECFG_HLRn(2), 0 }, 121 { RMIXL_PCIE_ECFG_HLRn(3), 0 }, 122 { RMIXL_PCIE_ECFG_RESR, __BITS(6,0) }, 123 { RMIXL_PCIE_ECFG_ESI, 0 }, 124 }; 125 #define PCIE_ECFG_ERRS_OFFTAB_NENTRIES \ 126 (sizeof(pcie_ecfg_errs_tab)/sizeof(pcie_ecfg_errs_tab[0])) 127 128 typedef struct rmixl_pcie_int_csr { 129 uint r0; 130 uint r1; 131 } rmixl_pcie_int_csr_t; 132 133 static const rmixl_pcie_int_csr_t int_enb_offset[4] = { 134 { RMIXL_PCIE_LINK0_INT_ENABLE0, RMIXL_PCIE_LINK0_INT_ENABLE1 }, 135 { RMIXL_PCIE_LINK1_INT_ENABLE0, RMIXL_PCIE_LINK1_INT_ENABLE1 }, 136 { RMIXL_PCIE_LINK2_INT_ENABLE0, RMIXL_PCIE_LINK2_INT_ENABLE1 }, 137 { RMIXL_PCIE_LINK3_INT_ENABLE0, RMIXL_PCIE_LINK3_INT_ENABLE1 }, 138 }; 139 140 static const rmixl_pcie_int_csr_t int_sts_offset[4] = { 141 { RMIXL_PCIE_LINK0_INT_STATUS0, RMIXL_PCIE_LINK0_INT_STATUS1 }, 142 { RMIXL_PCIE_LINK1_INT_STATUS0, RMIXL_PCIE_LINK1_INT_STATUS1 }, 143 { RMIXL_PCIE_LINK2_INT_STATUS0, RMIXL_PCIE_LINK2_INT_STATUS1 }, 144 { RMIXL_PCIE_LINK3_INT_STATUS0, RMIXL_PCIE_LINK3_INT_STATUS1 }, 145 }; 146 147 static const u_int msi_enb_offset[4] = { 148 RMIXL_PCIE_LINK0_MSI_ENABLE, 149 RMIXL_PCIE_LINK1_MSI_ENABLE, 150 RMIXL_PCIE_LINK2_MSI_ENABLE, 151 RMIXL_PCIE_LINK3_MSI_ENABLE 152 }; 153 154 #define RMIXL_PCIE_LINK_STATUS0_ERRORS __BITS(6,4) 155 #define RMIXL_PCIE_LINK_STATUS1_ERRORS __BITS(10,0) 156 #define RMIXL_PCIE_LINK_STATUS_ERRORS \ 157 ((((uint64_t)RMIXL_PCIE_LINK_STATUS1_ERRORS) << 32) | \ 158 (uint64_t)RMIXL_PCIE_LINK_STATUS0_ERRORS) 159 160 #define RMIXL_PCIE_EVCNT(sc, link, bitno, cpu) \ 161 &(sc)->sc_evcnts[link][(bitno) * (ncpu) + (cpu)] 162 163 static int rmixl_pcie_match(device_t, cfdata_t, void *); 164 static void rmixl_pcie_attach(device_t, device_t, void *); 165 static void rmixl_pcie_init(struct rmixl_pcie_softc *); 166 static void rmixl_pcie_init_ecfg(struct rmixl_pcie_softc *); 167 static void rmixl_pcie_attach_hook(device_t, device_t, 168 struct pcibus_attach_args *); 169 static void rmixl_pcie_lnkcfg_4xx(rmixl_pcie_lnktab_t *, uint32_t); 170 static void rmixl_pcie_lnkcfg_408Lite(rmixl_pcie_lnktab_t *, uint32_t); 171 static void rmixl_pcie_lnkcfg_2xx(rmixl_pcie_lnktab_t *, uint32_t); 172 static void rmixl_pcie_lnkcfg_1xx(rmixl_pcie_lnktab_t *, uint32_t); 173 static void rmixl_pcie_lnkcfg(struct rmixl_pcie_softc *); 174 static void rmixl_pcie_intcfg(struct rmixl_pcie_softc *); 175 static void rmixl_pcie_errata(struct rmixl_pcie_softc *); 176 static void rmixl_conf_interrupt(void *, int, int, int, int, int *); 177 static int rmixl_pcie_bus_maxdevs(void *, int); 178 static pcitag_t rmixl_tag_to_ecfg(pcitag_t); 179 static pcitag_t rmixl_pcie_make_tag(void *, int, int, int); 180 static void rmixl_pcie_decompose_tag(void *, pcitag_t, int *, int *, int *); 181 void rmixl_pcie_tag_print(const char *restrict, void *, pcitag_t, int, vaddr_t, u_long); 182 static int rmixl_pcie_conf_setup(struct rmixl_pcie_softc *, 183 pcitag_t, int *, bus_space_tag_t *, 184 bus_space_handle_t *); 185 static pcireg_t rmixl_pcie_conf_read(void *, pcitag_t, int); 186 static void rmixl_pcie_conf_write(void *, pcitag_t, int, pcireg_t); 187 188 static int rmixl_pcie_intr_map(const struct pci_attach_args *, 189 pci_intr_handle_t *); 190 static const char * 191 rmixl_pcie_intr_string(void *, pci_intr_handle_t, char *, 192 size_t); 193 static const struct evcnt * 194 rmixl_pcie_intr_evcnt(void *, pci_intr_handle_t); 195 static pci_intr_handle_t 196 rmixl_pcie_make_pih(u_int, u_int, u_int); 197 static void rmixl_pcie_decompose_pih(pci_intr_handle_t, u_int *, u_int *, u_int *); 198 static void rmixl_pcie_intr_disestablish(void *, void *); 199 static void *rmixl_pcie_intr_establish(void *, pci_intr_handle_t, 200 int, int (*)(void *), void *); 201 static rmixl_pcie_link_intr_t * 202 rmixl_pcie_lip_add_1(rmixl_pcie_softc_t *, u_int, int, int); 203 static void rmixl_pcie_lip_free_callout(rmixl_pcie_link_intr_t *); 204 static void rmixl_pcie_lip_free(void *); 205 static int rmixl_pcie_intr(void *); 206 static void rmixl_pcie_link_error_intr(u_int, uint32_t, uint32_t); 207 #if defined(DEBUG) || defined(DDB) 208 int rmixl_pcie_error_check(void); 209 #endif 210 static int _rmixl_pcie_error_check(void *); 211 static int rmixl_pcie_error_intr(void *); 212 213 214 #define RMIXL_PCIE_CONCAT3(a,b,c) a ## b ## c 215 #define RMIXL_PCIE_BAR_INIT(reg, bar, size, align) { \ 216 struct extent *ext = rmixl_configuration.rc_phys_ex; \ 217 u_long region_start; \ 218 uint64_t ba; \ 219 int err; \ 220 \ 221 err = extent_alloc(ext, (size), (align), 0UL, EX_NOWAIT, \ 222 ®ion_start); \ 223 if (err != 0) \ 224 panic("%s: extent_alloc(%p, %#lx, %#lx, %#lx, %#x, %p)",\ 225 __func__, ext, size, align, 0UL, EX_NOWAIT, \ 226 ®ion_start); \ 227 ba = (uint64_t)region_start; \ 228 ba *= (1024 * 1024); \ 229 bar = RMIXL_PCIE_CONCAT3(RMIXL_PCIE_,reg,_BAR)(ba, 1); \ 230 DPRINTF(("PCIE %s BAR was not enabled by firmware\n" \ 231 "enabling %s at phys %#" PRIxBUSADDR ", size %lu MB\n", \ 232 __STRING(reg), __STRING(reg), ba, size)); \ 233 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_BRIDGE + \ 234 RMIXL_PCIE_CONCAT3(RMIXLS_SBC_PCIE_,reg,_BAR), bar); \ 235 bar = RMIXL_IOREG_READ(RMIXL_IO_DEV_BRIDGE + \ 236 RMIXL_PCIE_CONCAT3(RMIXLS_SBC_PCIE_,reg,_BAR)); \ 237 DPRINTF(("%s: %s BAR %#x\n", __func__, __STRING(reg), bar)); \ 238 } 239 240 241 #if defined(DEBUG) || defined(DDB) 242 static void *rmixl_pcie_v; 243 #endif 244 245 CFATTACH_DECL_NEW(rmixl_pcie, sizeof(struct rmixl_pcie_softc), 246 rmixl_pcie_match, rmixl_pcie_attach, NULL, NULL); 247 248 static int rmixl_pcie_found; 249 250 static int 251 rmixl_pcie_match(device_t parent, cfdata_t cf, void *aux) 252 { 253 uint32_t r; 254 255 /* 256 * PCIe interface exists on XLS chips only 257 */ 258 if (! cpu_rmixls(mips_options.mips_cpu)) 259 return 0; 260 261 /* XXX 262 * for now there is only one PCIe Interface on chip 263 * this could change with furture RMI XL family designs 264 */ 265 if (rmixl_pcie_found) 266 return 0; 267 268 /* read GPIO Reset Configuration register */ 269 r = RMIXL_IOREG_READ(RMIXL_IO_DEV_GPIO + RMIXL_GPIO_RESET_CFG); 270 r >>= 26; 271 r &= 3; 272 if (r != 0) 273 return 0; /* strapped for SRIO */ 274 275 return 1; 276 } 277 278 static void 279 rmixl_pcie_attach(device_t parent, device_t self, void *aux) 280 { 281 struct rmixl_pcie_softc *sc = device_private(self); 282 struct obio_attach_args *obio = aux; 283 struct rmixl_config *rcp = &rmixl_configuration; 284 struct pcibus_attach_args pba; 285 uint32_t bar; 286 287 rmixl_pcie_found = 1; 288 sc->sc_dev = self; 289 290 aprint_normal(" RMI XLS PCIe Interface\n"); 291 292 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_HIGH); 293 294 rmixl_pcie_lnkcfg(sc); 295 296 rmixl_pcie_intcfg(sc); 297 298 rmixl_pcie_errata(sc); 299 300 sc->sc_29bit_dmat = obio->obio_29bit_dmat; 301 sc->sc_32bit_dmat = obio->obio_32bit_dmat; 302 sc->sc_64bit_dmat = obio->obio_64bit_dmat; 303 304 sc->sc_tmsk = obio->obio_tmsk; 305 306 /* 307 * get PCI config space base addr from SBC PCIe CFG BAR 308 * initialize it if necessary 309 */ 310 bar = RMIXL_IOREG_READ(RMIXL_IO_DEV_BRIDGE + RMIXLS_SBC_PCIE_CFG_BAR); 311 DPRINTF(("%s: PCIE_CFG_BAR %#x\n", __func__, bar)); 312 if ((bar & RMIXL_PCIE_CFG_BAR_ENB) == 0) { 313 u_long n = RMIXL_PCIE_CFG_SIZE / (1024 * 1024); 314 RMIXL_PCIE_BAR_INIT(CFG, bar, n, n); 315 } 316 rcp->rc_pci_cfg_pbase = (bus_addr_t)RMIXL_PCIE_CFG_BAR_TO_BA(bar); 317 rcp->rc_pci_cfg_size = (bus_size_t)RMIXL_PCIE_CFG_SIZE; 318 319 /* 320 * get PCIE Extended config space base addr from SBC PCIe ECFG BAR 321 * initialize it if necessary 322 */ 323 bar = RMIXL_IOREG_READ(RMIXL_IO_DEV_BRIDGE + RMIXLS_SBC_PCIE_ECFG_BAR); 324 DPRINTF(("%s: PCIE_ECFG_BAR %#x\n", __func__, bar)); 325 if ((bar & RMIXL_PCIE_ECFG_BAR_ENB) == 0) { 326 u_long n = RMIXL_PCIE_ECFG_SIZE / (1024 * 1024); 327 RMIXL_PCIE_BAR_INIT(ECFG, bar, n, n); 328 } 329 rcp->rc_pci_ecfg_pbase = (bus_addr_t)RMIXL_PCIE_ECFG_BAR_TO_BA(bar); 330 rcp->rc_pci_ecfg_size = (bus_size_t)RMIXL_PCIE_ECFG_SIZE; 331 332 /* 333 * get PCI MEM space base [addr, size] from SBC PCIe MEM BAR 334 * initialize it if necessary 335 */ 336 bar = RMIXL_IOREG_READ(RMIXL_IO_DEV_BRIDGE + RMIXLS_SBC_PCIE_MEM_BAR); 337 DPRINTF(("%s: PCIE_MEM_BAR %#x\n", __func__, bar)); 338 if ((bar & RMIXL_PCIE_MEM_BAR_ENB) == 0) { 339 u_long n = 256; /* 256 MB */ 340 RMIXL_PCIE_BAR_INIT(MEM, bar, n, n); 341 } 342 rcp->rc_pci_mem_pbase = (bus_addr_t)RMIXL_PCIE_MEM_BAR_TO_BA(bar); 343 rcp->rc_pci_mem_size = (bus_size_t)RMIXL_PCIE_MEM_BAR_TO_SIZE(bar); 344 345 /* 346 * get PCI IO space base [addr, size] from SBC PCIe IO BAR 347 * initialize it if necessary 348 */ 349 bar = RMIXL_IOREG_READ(RMIXL_IO_DEV_BRIDGE + RMIXLS_SBC_PCIE_IO_BAR); 350 DPRINTF(("%s: PCIE_IO_BAR %#x\n", __func__, bar)); 351 if ((bar & RMIXL_PCIE_IO_BAR_ENB) == 0) { 352 u_long n = 32; /* 32 MB */ 353 RMIXL_PCIE_BAR_INIT(IO, bar, n, n); 354 } 355 rcp->rc_pci_io_pbase = (bus_addr_t)RMIXL_PCIE_IO_BAR_TO_BA(bar); 356 rcp->rc_pci_io_size = (bus_size_t)RMIXL_PCIE_IO_BAR_TO_SIZE(bar); 357 358 /* 359 * initialize the PCI CFG, ECFG bus space tags 360 */ 361 rmixl_pci_cfg_bus_mem_init(&rcp->rc_pci_cfg_memt, rcp); 362 sc->sc_pci_cfg_memt = &rcp->rc_pci_cfg_memt; 363 364 rmixl_pci_ecfg_bus_mem_init(&rcp->rc_pci_ecfg_memt, rcp); 365 sc->sc_pci_ecfg_memt = &rcp->rc_pci_ecfg_memt; 366 367 /* 368 * initialize the PCI MEM and IO bus space tags 369 */ 370 rmixl_pci_bus_mem_init(&rcp->rc_pci_memt, rcp); 371 rmixl_pci_bus_io_init(&rcp->rc_pci_iot, rcp); 372 373 /* 374 * initialize the extended configuration regs 375 */ 376 rmixl_pcie_init_ecfg(sc); 377 378 /* 379 * initialize the PCI chipset tag 380 */ 381 rmixl_pcie_init(sc); 382 383 /* 384 * attach the PCI bus 385 */ 386 memset(&pba, 0, sizeof(pba)); 387 pba.pba_memt = &rcp->rc_pci_memt; 388 pba.pba_iot = &rcp->rc_pci_iot; 389 pba.pba_dmat = sc->sc_32bit_dmat; 390 pba.pba_dmat64 = sc->sc_64bit_dmat; 391 pba.pba_pc = &sc->sc_pci_chipset; 392 pba.pba_bus = 0; 393 pba.pba_bridgetag = NULL; 394 pba.pba_intrswiz = 0; 395 pba.pba_intrtag = 0; 396 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY | 397 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY; 398 399 config_found(self, &pba, pcibusprint, CFARGS_NONE); 400 } 401 402 /* 403 * rmixl_pcie_lnkcfg_4xx - link configs for XLS4xx and XLS6xx 404 * use IO_AD[11] and IO_AD[10], observable in 405 * Bits[21:20] of the GPIO Reset Configuration register 406 */ 407 static void 408 rmixl_pcie_lnkcfg_4xx(rmixl_pcie_lnktab_t *ltp, uint32_t grcr) 409 { 410 u_int index; 411 static const rmixl_pcie_lnkcfg_t lnktab_4xx[4][4] = { 412 {{ LCFG_EP, 4}, {LCFG_NO, 0}, {LCFG_NO, 0}, {LCFG_NO, 0}}, 413 {{ LCFG_RC, 4}, {LCFG_NO, 0}, {LCFG_NO, 0}, {LCFG_NO, 0}}, 414 {{ LCFG_EP, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}}, 415 {{ LCFG_RC, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}}, 416 }; 417 static const char *lnkstr_4xx[4] = { 418 "1EPx4", 419 "1RCx4", 420 "1EPx1, 3RCx1", 421 "4RCx1" 422 }; 423 index = (grcr >> 20) & 3; 424 ltp->ncfgs = 4; 425 ltp->cfg = lnktab_4xx[index]; 426 ltp->str = lnkstr_4xx[index]; 427 } 428 429 /* 430 * rmixl_pcie_lnkcfg_408Lite - link configs for XLS408Lite and XLS04A 431 * use IO_AD[11] and IO_AD[10], observable in 432 * Bits[21:20] of the GPIO Reset Configuration register 433 */ 434 static void 435 rmixl_pcie_lnkcfg_408Lite(rmixl_pcie_lnktab_t *ltp, uint32_t grcr) 436 { 437 u_int index; 438 static const rmixl_pcie_lnkcfg_t lnktab_408Lite[4][2] = { 439 {{ LCFG_EP, 4}, {LCFG_NO, 0}}, 440 {{ LCFG_RC, 4}, {LCFG_NO, 0}}, 441 {{ LCFG_EP, 1}, {LCFG_RC, 1}}, 442 {{ LCFG_RC, 1}, {LCFG_RC, 1}}, 443 }; 444 static const char *lnkstr_408Lite[4] = { 445 "4EPx4", 446 "1RCx4", 447 "1EPx1, 1RCx1", 448 "2RCx1" 449 }; 450 451 index = (grcr >> 20) & 3; 452 ltp->ncfgs = 2; 453 ltp->cfg = lnktab_408Lite[index]; 454 ltp->str = lnkstr_408Lite[index]; 455 } 456 457 /* 458 * rmixl_pcie_lnkcfg_2xx - link configs for XLS2xx 459 * use IO_AD[10], observable in Bit[20] of the 460 * GPIO Reset Configuration register 461 */ 462 static void 463 rmixl_pcie_lnkcfg_2xx(rmixl_pcie_lnktab_t *ltp, uint32_t grcr) 464 { 465 u_int index; 466 static const rmixl_pcie_lnkcfg_t lnktab_2xx[2][4] = { 467 {{ LCFG_EP, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}}, 468 {{ LCFG_RC, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}, {LCFG_RC, 1}} 469 }; 470 static const char *lnkstr_2xx[2] = { 471 "1EPx1, 3RCx1", 472 "4RCx1", 473 }; 474 475 index = (grcr >> 20) & 1; 476 ltp->ncfgs = 4; 477 ltp->cfg = lnktab_2xx[index]; 478 ltp->str = lnkstr_2xx[index]; 479 } 480 481 /* 482 * rmixl_pcie_lnkcfg_1xx - link configs for XLS1xx 483 * use IO_AD[10], observable in Bit[20] of the 484 * GPIO Reset Configuration register 485 */ 486 static void 487 rmixl_pcie_lnkcfg_1xx(rmixl_pcie_lnktab_t *ltp, uint32_t grcr) 488 { 489 u_int index; 490 static const rmixl_pcie_lnkcfg_t lnktab_1xx[2][2] = { 491 {{ LCFG_EP, 1}, {LCFG_RC, 1}}, 492 {{ LCFG_RC, 1}, {LCFG_RC, 1}} 493 }; 494 static const char *lnkstr_1xx[2] = { 495 "1EPx1, 1RCx1", 496 "2RCx1", 497 }; 498 499 index = (grcr >> 20) & 1; 500 ltp->ncfgs = 2; 501 ltp->cfg = lnktab_1xx[index]; 502 ltp->str = lnkstr_1xx[index]; 503 } 504 505 /* 506 * rmixl_pcie_lnkcfg - determine PCI Express Link Configuration 507 */ 508 static void 509 rmixl_pcie_lnkcfg(struct rmixl_pcie_softc *sc) 510 { 511 uint32_t r; 512 513 /* read GPIO Reset Configuration register */ 514 r = RMIXL_IOREG_READ(RMIXL_IO_DEV_GPIO + RMIXL_GPIO_RESET_CFG); 515 DPRINTF(("%s: GPIO RCR %#x\n", __func__, r)); 516 517 switch (MIPS_PRID_IMPL(mips_options.mips_cpu_id)) { 518 case MIPS_XLS104: 519 case MIPS_XLS108: 520 rmixl_pcie_lnkcfg_1xx(&sc->sc_pcie_lnktab, r); 521 break; 522 case MIPS_XLS204: 523 case MIPS_XLS208: 524 rmixl_pcie_lnkcfg_2xx(&sc->sc_pcie_lnktab, r); 525 break; 526 case MIPS_XLS404LITE: 527 case MIPS_XLS408LITE: 528 rmixl_pcie_lnkcfg_408Lite(&sc->sc_pcie_lnktab, r); 529 break; 530 case MIPS_XLS404: 531 case MIPS_XLS408: 532 case MIPS_XLS416: 533 case MIPS_XLS608: 534 case MIPS_XLS616: 535 /* 6xx uses same table as 4xx */ 536 rmixl_pcie_lnkcfg_4xx(&sc->sc_pcie_lnktab, r); 537 break; 538 default: 539 panic("%s: unknown RMI PRID IMPL", __func__); 540 } 541 542 aprint_normal("%s: link config %s\n", 543 device_xname(sc->sc_dev), sc->sc_pcie_lnktab.str); 544 } 545 546 /* 547 * rmixl_pcie_intcfg - init PCIe Link interrupt enables 548 */ 549 static void 550 rmixl_pcie_intcfg(struct rmixl_pcie_softc *sc) 551 { 552 int link; 553 size_t size; 554 rmixl_pcie_evcnt_t *ev; 555 556 DPRINTF(("%s: disable all link interrupts\n", __func__)); 557 for (link=0; link < sc->sc_pcie_lnktab.ncfgs; link++) { 558 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_PCIE_LE + int_enb_offset[link].r0, 559 RMIXL_PCIE_LINK_STATUS0_ERRORS); 560 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_PCIE_LE + int_enb_offset[link].r1, 561 RMIXL_PCIE_LINK_STATUS1_ERRORS); 562 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_PCIE_LE + msi_enb_offset[link], 0); 563 sc->sc_link_intr[link] = NULL; 564 565 /* 566 * allocate per-cpu, per-pin interrupt event counters 567 */ 568 size = ncpu * PCI_INTERRUPT_PIN_MAX * sizeof(rmixl_pcie_evcnt_t); 569 ev = malloc(size, M_DEVBUF, M_WAITOK); 570 sc->sc_evcnts[link] = ev; 571 for (int pin=PCI_INTERRUPT_PIN_A; pin <= PCI_INTERRUPT_PIN_MAX; pin++) { 572 for (int cpu=0; cpu < ncpu; cpu++) { 573 ev = RMIXL_PCIE_EVCNT(sc, link, pin - 1, cpu); 574 snprintf(ev->name, sizeof(ev->name), 575 "cpu%d, link %d, pin %d", cpu, link, pin); 576 evcnt_attach_dynamic(&ev->evcnt, EVCNT_TYPE_INTR, 577 NULL, "rmixl_pcie", ev->name); 578 } 579 } 580 } 581 } 582 583 static void 584 rmixl_pcie_errata(struct rmixl_pcie_softc *sc) 585 { 586 const mips_prid_t cpu_id = mips_options.mips_cpu_id; 587 u_int rev; 588 u_int lanes; 589 bool e391 = false; 590 591 /* 592 * 3.9.1 PCIe Link-0 Registers Reset to Incorrect Values 593 * check if it allies to this CPU implementation and revision 594 */ 595 rev = MIPS_PRID_REV(cpu_id); 596 switch (MIPS_PRID_IMPL(cpu_id)) { 597 case MIPS_XLS104: 598 case MIPS_XLS108: 599 break; 600 case MIPS_XLS204: 601 case MIPS_XLS208: 602 /* stepping A0 is affected */ 603 if (rev == 0) 604 e391 = true; 605 break; 606 case MIPS_XLS404LITE: 607 case MIPS_XLS408LITE: 608 break; 609 case MIPS_XLS404: 610 case MIPS_XLS408: 611 case MIPS_XLS416: 612 /* steppings A0 and A1 are affected */ 613 if ((rev == 0) || (rev == 1)) 614 e391 = true; 615 break; 616 case MIPS_XLS608: 617 case MIPS_XLS616: 618 break; 619 default: 620 panic("unknown RMI PRID IMPL"); 621 } 622 623 /* 624 * for XLS we only need to check entry #0 625 * this may need to change for later XL family chips 626 */ 627 lanes = sc->sc_pcie_lnktab.cfg[0].lanes; 628 629 if ((e391 != false) && ((lanes == 2) || (lanes == 4))) { 630 /* 631 * attempt work around for errata 3.9.1 632 * "PCIe Link-0 Registers Reset to Incorrect Values" 633 * the registers are write-once: if the firmware already wrote, 634 * then our writes are ignored; hope they did it right. 635 */ 636 uint32_t queuectrl; 637 uint32_t bufdepth; 638 #ifdef DIAGNOSTIC 639 uint32_t r; 640 #endif 641 642 aprint_normal("%s: attempt work around for errata 3.9.1", 643 device_xname(sc->sc_dev)); 644 if (lanes == 4) { 645 queuectrl = 0x00018074; 646 bufdepth = 0x001901D1; 647 } else { 648 queuectrl = 0x00018036; 649 bufdepth = 0x001900D9; 650 } 651 652 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_PCIE_BE + 653 RMIXL_VC0_POSTED_RX_QUEUE_CTRL, queuectrl); 654 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_PCIE_BE + 655 RMIXL_VC0_POSTED_BUFFER_DEPTH, bufdepth); 656 657 #ifdef DIAGNOSTIC 658 r = RMIXL_IOREG_READ(RMIXL_IO_DEV_PCIE_BE + 659 RMIXL_VC0_POSTED_RX_QUEUE_CTRL); 660 printf("\nVC0_POSTED_RX_QUEUE_CTRL %#x\n", r); 661 662 r = RMIXL_IOREG_READ(RMIXL_IO_DEV_PCIE_BE + 663 RMIXL_VC0_POSTED_BUFFER_DEPTH); 664 printf("VC0_POSTED_BUFFER_DEPTH %#x\n", r); 665 #endif 666 } 667 } 668 669 static void 670 rmixl_pcie_init(struct rmixl_pcie_softc *sc) 671 { 672 pci_chipset_tag_t pc = &sc->sc_pci_chipset; 673 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 674 struct pciconf_resources *pcires; 675 #endif 676 677 pc->pc_conf_v = (void *)sc; 678 pc->pc_attach_hook = rmixl_pcie_attach_hook; 679 pc->pc_bus_maxdevs = rmixl_pcie_bus_maxdevs; 680 pc->pc_make_tag = rmixl_pcie_make_tag; 681 pc->pc_decompose_tag = rmixl_pcie_decompose_tag; 682 pc->pc_conf_read = rmixl_pcie_conf_read; 683 pc->pc_conf_write = rmixl_pcie_conf_write; 684 685 pc->pc_intr_v = (void *)sc; 686 pc->pc_intr_map = rmixl_pcie_intr_map; 687 pc->pc_intr_string = rmixl_pcie_intr_string; 688 pc->pc_intr_evcnt = rmixl_pcie_intr_evcnt; 689 pc->pc_intr_establish = rmixl_pcie_intr_establish; 690 pc->pc_intr_disestablish = rmixl_pcie_intr_disestablish; 691 pc->pc_conf_interrupt = rmixl_conf_interrupt; 692 693 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 694 /* 695 * Configure the PCI bus. 696 */ 697 struct rmixl_config *rcp = &rmixl_configuration; 698 699 aprint_normal_dev(sc->sc_dev, "configuring PCI bus\n"); 700 701 pcires = pciconf_resource_init(); 702 703 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO, 704 rcp->rc_pci_io_pbase, rcp->rc_pci_io_size); 705 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM, 706 rcp->rc_pci_mem_pbase, rcp->rc_pci_mem_size); 707 708 pci_configure_bus(pc, pcires, 0, 709 mips_cache_info.mci_dcache_align); 710 711 pciconf_resource_fini(pcires); 712 #endif 713 } 714 715 static void 716 rmixl_pcie_init_ecfg(struct rmixl_pcie_softc *sc) 717 { 718 void *v; 719 pcitag_t tag; 720 pcireg_t r; 721 722 v = sc; 723 tag = rmixl_pcie_make_tag(v, 0, 0, 0); 724 725 #ifdef PCI_DEBUG 726 int i, offset; 727 static const int offtab[] = 728 { 0, 4, 8, 0xc, 0x10, 0x14, 0x18, 0x1c, 729 0x2c, 0x30, 0x34 }; 730 for (i=0; i < sizeof(offtab)/sizeof(offtab[0]); i++) { 731 offset = 0x100 + offtab[i]; 732 r = rmixl_pcie_conf_read(v, tag, offset); 733 printf("%s: %#x: %#x\n", __func__, offset, r); 734 } 735 #endif 736 r = rmixl_pcie_conf_read(v, tag, 0x100); 737 if (r == -1) 738 return; /* cannot access */ 739 740 /* check pre-existing uncorrectable errs */ 741 r = rmixl_pcie_conf_read(v, tag, RMIXL_PCIE_ECFG_UESR); 742 r &= ~PCIE_ECFG_UExR_RESV; 743 if (r != 0) 744 panic("%s: Uncorrectable Error Status: %#x\n", 745 __func__, r); 746 747 /* unmask all uncorrectable errs */ 748 r = rmixl_pcie_conf_read(v, tag, RMIXL_PCIE_ECFG_UEMR); 749 r &= ~PCIE_ECFG_UExR_RESV; 750 rmixl_pcie_conf_write(v, tag, RMIXL_PCIE_ECFG_UEMR, r); 751 752 /* ensure default uncorrectable err severity confniguration */ 753 r = rmixl_pcie_conf_read(v, tag, RMIXL_PCIE_ECFG_UEVR); 754 r &= ~PCIE_ECFG_UExR_RESV; 755 r |= PCIE_ECFG_UEVR_DFLT; 756 rmixl_pcie_conf_write(v, tag, RMIXL_PCIE_ECFG_UEVR, r); 757 758 /* check pre-existing correctable errs */ 759 r = rmixl_pcie_conf_read(v, tag, RMIXL_PCIE_ECFG_CESR); 760 r &= ~PCIE_ECFG_CExR_RESV; 761 #ifdef DIAGNOSTIC 762 if (r != 0) 763 aprint_normal("%s: Correctable Error Status: %#x\n", 764 device_xname(sc->sc_dev), r); 765 #endif 766 767 /* unmask all correctable errs */ 768 r = rmixl_pcie_conf_read(v, tag, RMIXL_PCIE_ECFG_CEMR); 769 r &= ~PCIE_ECFG_CExR_RESV; 770 rmixl_pcie_conf_write(v, tag, RMIXL_PCIE_ECFG_UEMR, r); 771 772 /* check pre-existing Root Error Status */ 773 r = rmixl_pcie_conf_read(v, tag, RMIXL_PCIE_ECFG_RESR); 774 r &= ~PCIE_ECFG_RESR_RESV; 775 if (r != 0) 776 panic("%s: Root Error Status: %#x\n", __func__, r); 777 /* XXX TMP FIXME */ 778 779 /* enable all Root errs */ 780 r = (pcireg_t)(~PCIE_ECFG_RECR_RESV); 781 rmixl_pcie_conf_write(v, tag, RMIXL_PCIE_ECFG_RECR, r); 782 783 /* 784 * establish ISR for PCIE Fatal Error interrupt 785 * - for XLS4xxLite, XLS2xx, XLS1xx only 786 */ 787 switch (MIPS_PRID_IMPL(mips_options.mips_cpu_id)) { 788 case MIPS_XLS104: 789 case MIPS_XLS108: 790 case MIPS_XLS204: 791 case MIPS_XLS208: 792 case MIPS_XLS404LITE: 793 case MIPS_XLS408LITE: 794 sc->sc_fatal_ih = rmixl_intr_establish(29, sc->sc_tmsk, 795 IPL_HIGH, RMIXL_TRIG_LEVEL, RMIXL_POLR_HIGH, 796 rmixl_pcie_error_intr, v, false); 797 break; 798 default: 799 break; 800 } 801 802 #if defined(DEBUG) || defined(DDB) 803 rmixl_pcie_v = v; 804 #endif 805 } 806 807 void 808 rmixl_conf_interrupt(void *v, int bus, int dev, int ipin, int swiz, int *iline) 809 { 810 DPRINTF(("%s: %p, %d, %d, %d, %d, %p\n", 811 __func__, v, bus, dev, ipin, swiz, iline)); 812 } 813 814 void 815 rmixl_pcie_attach_hook(device_t parent, device_t self, 816 struct pcibus_attach_args *pba) 817 { 818 DPRINTF(("%s: pba_bus %d, pba_bridgetag %p, pc_conf_v %p\n", 819 __func__, pba->pba_bus, pba->pba_bridgetag, 820 pba->pba_pc->pc_conf_v)); 821 } 822 823 int 824 rmixl_pcie_bus_maxdevs(void *v, int busno) 825 { 826 return (32); /* XXX depends on the family of XLS SoC */ 827 } 828 829 /* 830 * rmixl_tag_to_ecfg - convert cfg address (generic tag) to ecfg address 831 * 832 * 39:29 (reserved) 833 * 28 Swap (0=little, 1=big endian) 834 * 27:20 Bus number 835 * 19:15 Device number 836 * 14:12 Function number 837 * 11:8 Extended Register number 838 * 7:0 Register number 839 */ 840 static pcitag_t 841 rmixl_tag_to_ecfg(pcitag_t tag) 842 { 843 KASSERT((tag & __BITS(7,0)) == 0); 844 return (tag << 4); 845 } 846 847 /* 848 * XLS pci tag is a 40 bit address composed thusly: 849 * 39:25 (reserved) 850 * 24 Swap (0=little, 1=big endian) 851 * 23:16 Bus number 852 * 15:11 Device number 853 * 10:8 Function number 854 * 7:0 Register number 855 * 856 * Note: this is the "native" composition for addressing CFG space, but not for ECFG space. 857 */ 858 pcitag_t 859 rmixl_pcie_make_tag(void *v, int bus, int dev, int fun) 860 { 861 return ((bus << 16) | (dev << 11) | (fun << 8)); 862 } 863 864 void 865 rmixl_pcie_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 866 { 867 if (bp != NULL) 868 *bp = (tag >> 16) & 0xff; 869 if (dp != NULL) 870 *dp = (tag >> 11) & 0x1f; 871 if (fp != NULL) 872 *fp = (tag >> 8) & 0x7; 873 } 874 875 void 876 rmixl_pcie_tag_print(const char *restrict s, void *v, pcitag_t tag, int offset, 877 vaddr_t va, u_long r) 878 { 879 int bus, dev, fun; 880 881 rmixl_pcie_decompose_tag(v, tag, &bus, &dev, &fun); 882 printf("%s: %d/%d/%d/%d - %#" PRIxVADDR ":%#lx\n", 883 s, bus, dev, fun, offset, va, r); 884 } 885 886 static int 887 rmixl_pcie_conf_setup(struct rmixl_pcie_softc *sc, 888 pcitag_t tag, int *offp, bus_space_tag_t *bstp, 889 bus_space_handle_t *bshp) 890 { 891 struct rmixl_config *rcp = &rmixl_configuration; 892 bus_space_tag_t bst; 893 bus_space_handle_t bsh; 894 bus_size_t size; 895 pcitag_t mask; 896 bus_addr_t ba; 897 int err; 898 static bus_space_handle_t cfg_bsh; 899 static bus_addr_t cfg_oba = -1; 900 static bus_space_handle_t ecfg_bsh; 901 static bus_addr_t ecfg_oba = -1; 902 903 /* 904 * bus space depends on offset 905 */ 906 if ((*offp >= 0) && (*offp < 0x100)) { 907 mask = __BITS(15,0); 908 bst = sc->sc_pci_cfg_memt; 909 ba = rcp->rc_pci_cfg_pbase; 910 ba += (tag & ~mask); 911 *offp += (tag & mask); 912 if (ba != cfg_oba) { 913 size = (bus_size_t)(mask + 1); 914 if (cfg_oba != -1) 915 bus_space_unmap(bst, cfg_bsh, size); 916 err = bus_space_map(bst, ba, size, 0, &cfg_bsh); 917 if (err != 0) { 918 #ifdef DEBUG 919 panic("%s: bus_space_map err %d, CFG space", 920 __func__, err); /* XXX */ 921 #endif 922 return -1; 923 } 924 cfg_oba = ba; 925 } 926 bsh = cfg_bsh; 927 } else if ((*offp >= 0x100) && (*offp <= 0x700)) { 928 mask = __BITS(14,0); 929 tag = rmixl_tag_to_ecfg(tag); /* convert to ECFG format */ 930 bst = sc->sc_pci_ecfg_memt; 931 ba = rcp->rc_pci_ecfg_pbase; 932 ba += (tag & ~mask); 933 *offp += (tag & mask); 934 if (ba != ecfg_oba) { 935 size = (bus_size_t)(mask + 1); 936 if (ecfg_oba != -1) 937 bus_space_unmap(bst, ecfg_bsh, size); 938 err = bus_space_map(bst, ba, size, 0, &ecfg_bsh); 939 if (err != 0) { 940 #ifdef DEBUG 941 panic("%s: bus_space_map err %d, ECFG space", 942 __func__, err); /* XXX */ 943 #endif 944 return -1; 945 } 946 ecfg_oba = ba; 947 } 948 bsh = ecfg_bsh; 949 } else if ((*offp > 0x700) && (*offp <= PCI_EXTCONF_SIZE)) { 950 return -1; 951 } else { 952 #ifdef DEBUG 953 panic("%s: offset %#x: unknown", __func__, *offp); 954 #endif 955 return -1; 956 } 957 958 *bstp = bst; 959 *bshp = bsh; 960 961 return 0; 962 } 963 964 pcireg_t 965 rmixl_pcie_conf_read(void *v, pcitag_t tag, int offset) 966 { 967 struct rmixl_pcie_softc *sc = v; 968 static bus_space_handle_t bsh; 969 bus_space_tag_t bst; 970 pcireg_t rv; 971 uint64_t cfg0; 972 973 mutex_enter(&sc->sc_mutex); 974 975 if (rmixl_pcie_conf_setup(sc, tag, &offset, &bst, &bsh) == 0) { 976 cfg0 = rmixl_cache_err_dis(); 977 rv = bus_space_read_4(bst, bsh, (bus_size_t)offset); 978 if (rmixl_cache_err_check() != 0) { 979 #ifdef DIAGNOSTIC 980 int bus, dev, fun; 981 982 rmixl_pcie_decompose_tag(v, tag, &bus, &dev, &fun); 983 printf("%s: %d/%d/%d, offset %#x: bad address\n", 984 __func__, bus, dev, fun, offset); 985 #endif 986 rv = (pcireg_t) -1; 987 } 988 rmixl_cache_err_restore(cfg0); 989 } else { 990 rv = -1; 991 } 992 993 mutex_exit(&sc->sc_mutex); 994 995 return rv; 996 } 997 998 void 999 rmixl_pcie_conf_write(void *v, pcitag_t tag, int offset, pcireg_t val) 1000 { 1001 struct rmixl_pcie_softc *sc = v; 1002 static bus_space_handle_t bsh; 1003 bus_space_tag_t bst; 1004 uint64_t cfg0; 1005 1006 mutex_enter(&sc->sc_mutex); 1007 1008 if (rmixl_pcie_conf_setup(sc, tag, &offset, &bst, &bsh) == 0) { 1009 cfg0 = rmixl_cache_err_dis(); 1010 bus_space_write_4(bst, bsh, (bus_size_t)offset, val); 1011 if (rmixl_cache_err_check() != 0) { 1012 #ifdef DIAGNOSTIC 1013 int bus, dev, fun; 1014 1015 rmixl_pcie_decompose_tag(v, tag, &bus, &dev, &fun); 1016 printf("%s: %d/%d/%d, offset %#x: bad address\n", 1017 __func__, bus, dev, fun, offset); 1018 #endif 1019 } 1020 rmixl_cache_err_restore(cfg0); 1021 } 1022 1023 mutex_exit(&sc->sc_mutex); 1024 } 1025 1026 int 1027 rmixl_pcie_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *pih) 1028 { 1029 int device; 1030 u_int link; 1031 u_int irq; 1032 1033 /* 1034 * The bus is unimportant since it can change depending on the 1035 * configuration. We are tied to device # of PCIe bridge we are 1036 * ultimately attached to. 1037 */ 1038 pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, 1039 NULL, &device, NULL); 1040 1041 #ifdef DEBUG 1042 DPRINTF(("%s: ps_bus %d, pa_intrswiz %#x, pa_intrtag %#lx," 1043 " pa_intrpin %d, pa_intrline %d, pa_rawintrpin %d\n", 1044 __func__, pa->pa_bus, pa->pa_intrswiz, pa->pa_intrtag, 1045 pa->pa_intrpin, pa->pa_intrline, pa->pa_rawintrpin)); 1046 #endif 1047 1048 /* 1049 * PCIe Link INT irq assignment is cpu implementation specific 1050 */ 1051 switch (MIPS_PRID_IMPL(mips_options.mips_cpu_id)) { 1052 case MIPS_XLS104: 1053 case MIPS_XLS108: 1054 case MIPS_XLS404LITE: 1055 case MIPS_XLS408LITE: 1056 if (device > 1) 1057 panic("%s: bad bus %d", __func__, device); 1058 link = device; 1059 irq = device + 26; 1060 break; 1061 case MIPS_XLS204: 1062 case MIPS_XLS208: { 1063 if (device > 3) 1064 panic("%s: bad bus %d", __func__, device); 1065 link = device; 1066 irq = device + (device & 2 ? 21 : 26); 1067 break; 1068 } 1069 case MIPS_XLS404: 1070 case MIPS_XLS408: 1071 case MIPS_XLS416: 1072 case MIPS_XLS608: 1073 case MIPS_XLS616: 1074 if (device > 3) 1075 panic("%s: bad bus %d", __func__, device); 1076 link = device; 1077 irq = device + 26; 1078 break; 1079 default: 1080 panic("%s: cpu IMPL %#x not supported\n", 1081 __func__, MIPS_PRID_IMPL(mips_options.mips_cpu_id)); 1082 } 1083 1084 if (pa->pa_intrpin != PCI_INTERRUPT_PIN_NONE) 1085 *pih = rmixl_pcie_make_pih(link, pa->pa_intrpin - 1, irq); 1086 else 1087 *pih = ~0; 1088 1089 return 0; 1090 } 1091 1092 const char * 1093 rmixl_pcie_intr_string(void *v, pci_intr_handle_t pih, char *buf, size_t len) 1094 { 1095 const char *name = "(illegal)"; 1096 u_int link, bitno, irq; 1097 1098 rmixl_pcie_decompose_pih(pih, &link, &bitno, &irq); 1099 1100 switch (MIPS_PRID_IMPL(mips_options.mips_cpu_id)) { 1101 case MIPS_XLS104: 1102 case MIPS_XLS108: 1103 case MIPS_XLS404LITE: 1104 case MIPS_XLS408LITE: 1105 switch (irq) { 1106 case 26: 1107 case 27: 1108 name = rmixl_intr_string(RMIXL_IRT_VECTOR(irq)); 1109 break; 1110 } 1111 break; 1112 case MIPS_XLS204: 1113 case MIPS_XLS208: 1114 switch (irq) { 1115 case 23: 1116 case 24: 1117 case 26: 1118 case 27: 1119 name = rmixl_intr_string(RMIXL_IRT_VECTOR(irq)); 1120 break; 1121 } 1122 break; 1123 case MIPS_XLS404: 1124 case MIPS_XLS408: 1125 case MIPS_XLS416: 1126 case MIPS_XLS608: 1127 case MIPS_XLS616: 1128 switch (irq) { 1129 case 26: 1130 case 27: 1131 case 28: 1132 case 29: 1133 name = rmixl_intr_string(RMIXL_IRT_VECTOR(irq)); 1134 break; 1135 } 1136 break; 1137 default: 1138 panic("%s: cpu IMPL %#x not supported\n", 1139 __func__, MIPS_PRID_IMPL(mips_options.mips_cpu_id)); 1140 } 1141 1142 strlcpy(buf, name, len); 1143 return buf; 1144 } 1145 1146 const struct evcnt * 1147 rmixl_pcie_intr_evcnt(void *v, pci_intr_handle_t pih) 1148 { 1149 return NULL; 1150 } 1151 1152 static pci_intr_handle_t 1153 rmixl_pcie_make_pih(u_int link, u_int bitno, u_int irq) 1154 { 1155 pci_intr_handle_t pih; 1156 1157 KASSERT(link < RMIXL_PCIE_NLINKS_MAX); 1158 KASSERT(bitno < 64); 1159 KASSERT(irq < 32); 1160 1161 pih = (irq << 10); 1162 pih |= (bitno << 4); 1163 pih |= link; 1164 1165 return pih; 1166 } 1167 1168 static void 1169 rmixl_pcie_decompose_pih(pci_intr_handle_t pih, u_int *link, u_int *bitno, u_int *irq) 1170 { 1171 *link = (u_int)(pih & 0xf); 1172 *bitno = (u_int)((pih >> 4) & 0x3f); 1173 *irq = (u_int)(pih >> 10); 1174 1175 KASSERT(*link < RMIXL_PCIE_NLINKS_MAX); 1176 KASSERT(*bitno < 64); 1177 KASSERT(*irq < 32); 1178 } 1179 1180 static void 1181 rmixl_pcie_intr_disestablish(void *v, void *ih) 1182 { 1183 rmixl_pcie_softc_t *sc = v; 1184 rmixl_pcie_link_dispatch_t *dip = ih; 1185 rmixl_pcie_link_intr_t *lip = sc->sc_link_intr[dip->link]; 1186 uint32_t r; 1187 uint32_t bit; 1188 u_int offset; 1189 u_int other; 1190 bool busy; 1191 1192 DPRINTF(("%s: link=%d pin=%d irq=%d\n", 1193 __func__, dip->link, dip->bitno + 1, dip->irq)); 1194 1195 mutex_enter(&sc->sc_mutex); 1196 1197 dip->func = NULL; /* mark unused, prevent further dispatch */ 1198 1199 /* 1200 * if no other dispatch handle is using this interrupt, 1201 * we can disable it 1202 */ 1203 busy = false; 1204 for (int i=0; i < lip->dispatch_count; i++) { 1205 rmixl_pcie_link_dispatch_t *d = &lip->dispatch_data[i]; 1206 if (d == dip) 1207 continue; 1208 if (d->bitno == dip->bitno) { 1209 busy = true; 1210 break; 1211 } 1212 } 1213 if (! busy) { 1214 if (dip->bitno < 32) { 1215 bit = 1 << dip->bitno; 1216 offset = int_enb_offset[dip->link].r0; 1217 other = int_enb_offset[dip->link].r1; 1218 } else { 1219 bit = 1 << (dip->bitno - 32); 1220 offset = int_enb_offset[dip->link].r1; 1221 other = int_enb_offset[dip->link].r0; 1222 } 1223 1224 /* disable this interrupt in the PCIe bridge */ 1225 r = RMIXL_IOREG_READ(RMIXL_IO_DEV_PCIE_LE + offset); 1226 r &= ~bit; 1227 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_PCIE_LE + offset, r); 1228 1229 /* 1230 * if both ENABLE0 and ENABLE1 are 0 1231 * disable the link interrupt 1232 */ 1233 if (r == 0) { 1234 /* check the other reg */ 1235 if (RMIXL_IOREG_READ(RMIXL_IO_DEV_PCIE_LE + other) == 0) { 1236 DPRINTF(("%s: disable link %d\n", __func__, lip->link)); 1237 1238 /* tear down interrupt on this link */ 1239 rmixl_intr_disestablish(lip->ih); 1240 1241 /* commit NULL interrupt set */ 1242 sc->sc_link_intr[dip->link] = NULL; 1243 1244 /* schedule delayed free of the old link interrupt set */ 1245 rmixl_pcie_lip_free_callout(lip); 1246 } 1247 } 1248 } 1249 1250 mutex_exit(&sc->sc_mutex); 1251 } 1252 1253 static void * 1254 rmixl_pcie_intr_establish(void *v, pci_intr_handle_t pih, int ipl, 1255 int (*func)(void *), void *arg) 1256 { 1257 rmixl_pcie_softc_t *sc = v; 1258 u_int link, bitno, irq; 1259 uint32_t r; 1260 rmixl_pcie_link_intr_t *lip; 1261 rmixl_pcie_link_dispatch_t *dip = NULL; 1262 uint32_t bit; 1263 u_int offset; 1264 1265 if (pih == ~0) { 1266 DPRINTF(("%s: bad pih=%#lx, implies PCI_INTERRUPT_PIN_NONE\n", 1267 __func__, pih)); 1268 return NULL; 1269 } 1270 1271 rmixl_pcie_decompose_pih(pih, &link, &bitno, &irq); 1272 DPRINTF(("%s: link=%d pin=%d irq=%d\n", 1273 __func__, link, bitno + 1, irq)); 1274 1275 mutex_enter(&sc->sc_mutex); 1276 1277 lip = rmixl_pcie_lip_add_1(sc, link, irq, ipl); 1278 if (lip == NULL) 1279 return NULL; 1280 1281 /* 1282 * initializae our new interrupt, the last element in dispatch_data[] 1283 */ 1284 dip = &lip->dispatch_data[lip->dispatch_count - 1]; 1285 dip->link = link; 1286 dip->bitno = bitno; 1287 dip->irq = irq; 1288 dip->func = func; 1289 dip->arg = arg; 1290 dip->counts = RMIXL_PCIE_EVCNT(sc, link, bitno, 0); 1291 1292 if (bitno < 32) { 1293 offset = int_enb_offset[link].r0; 1294 bit = 1 << bitno; 1295 } else { 1296 offset = int_enb_offset[link].r1; 1297 bit = 1 << (bitno - 32); 1298 } 1299 1300 /* commit the new link interrupt set */ 1301 sc->sc_link_intr[link] = lip; 1302 1303 /* enable this interrupt in the PCIe bridge */ 1304 r = RMIXL_IOREG_READ(RMIXL_IO_DEV_PCIE_LE + offset); 1305 r |= bit; 1306 RMIXL_IOREG_WRITE(RMIXL_IO_DEV_PCIE_LE + offset, r); 1307 1308 mutex_exit(&sc->sc_mutex); 1309 return dip; 1310 } 1311 1312 rmixl_pcie_link_intr_t * 1313 rmixl_pcie_lip_add_1(rmixl_pcie_softc_t *sc, u_int link, int irq, int ipl) 1314 { 1315 rmixl_pcie_link_intr_t *lip_old = sc->sc_link_intr[link]; 1316 rmixl_pcie_link_intr_t *lip_new; 1317 u_int dispatch_count; 1318 size_t size; 1319 1320 dispatch_count = 1; 1321 size = sizeof(rmixl_pcie_link_intr_t); 1322 if (lip_old != NULL) { 1323 /* 1324 * count only those dispatch elements still in use 1325 * unused ones will be pruned during copy 1326 * i.e. we are "lazy" there is no rmixl_pcie_lip_sub_1 1327 */ 1328 for (int i=0; i < lip_old->dispatch_count; i++) { 1329 if (lip_old->dispatch_data[i].func != NULL) { 1330 dispatch_count++; 1331 size += sizeof(rmixl_pcie_link_intr_t); 1332 } 1333 } 1334 } 1335 1336 /* 1337 * allocate and initialize link intr struct 1338 * with one or more dispatch handles 1339 */ 1340 lip_new = malloc(size, M_DEVBUF, M_WAITOK); 1341 if (lip_old == NULL) { 1342 /* initialize the link interrupt struct */ 1343 lip_new->sc = sc; 1344 lip_new->link = link; 1345 lip_new->ipl = ipl; 1346 lip_new->ih = rmixl_intr_establish(irq, sc->sc_tmsk, 1347 ipl, RMIXL_TRIG_LEVEL, RMIXL_POLR_HIGH, 1348 rmixl_pcie_intr, lip_new, false); 1349 if (lip_new->ih == NULL) 1350 panic("%s: cannot establish irq %d", __func__, irq); 1351 } else { 1352 /* 1353 * all intrs on a link get same ipl and sc 1354 * first intr established sets the standard 1355 */ 1356 KASSERT(sc == lip_old->sc); 1357 if (sc != lip_old->sc) { 1358 printf("%s: sc %p mismatch\n", __func__, sc); 1359 free(lip_new, M_DEVBUF); 1360 return NULL; 1361 } 1362 KASSERT (ipl == lip_old->ipl); 1363 if (ipl != lip_old->ipl) { 1364 printf("%s: ipl %d mismatch\n", __func__, ipl); 1365 free(lip_new, M_DEVBUF); 1366 return NULL; 1367 } 1368 /* 1369 * copy lip_old to lip_new, skipping unused dispatch elemets 1370 */ 1371 memcpy(lip_new, lip_old, sizeof(rmixl_pcie_link_intr_t)); 1372 for (int j=0, i=0; i < lip_old->dispatch_count; i++) { 1373 if (lip_old->dispatch_data[i].func != NULL) { 1374 memcpy(&lip_new->dispatch_data[j], 1375 &lip_old->dispatch_data[i], 1376 sizeof(rmixl_pcie_link_dispatch_t)); 1377 j++; 1378 } 1379 } 1380 1381 /* 1382 * schedule delayed free of old link interrupt set 1383 */ 1384 rmixl_pcie_lip_free_callout(lip_old); 1385 } 1386 lip_new->dispatch_count = dispatch_count; 1387 1388 return lip_new; 1389 } 1390 1391 /* 1392 * delay free of the old link interrupt set 1393 * to allow anyone still using it to do so safely 1394 * XXX 2 seconds should be plenty? 1395 */ 1396 static void 1397 rmixl_pcie_lip_free_callout(rmixl_pcie_link_intr_t *lip) 1398 { 1399 callout_init(&lip->callout, 0); 1400 callout_reset(&lip->callout, 2 * hz, rmixl_pcie_lip_free, lip); 1401 } 1402 1403 static void 1404 rmixl_pcie_lip_free(void *arg) 1405 { 1406 rmixl_pcie_link_intr_t *lip = arg; 1407 1408 callout_destroy(&lip->callout); 1409 free(lip, M_DEVBUF); 1410 } 1411 1412 static int 1413 rmixl_pcie_intr(void *arg) 1414 { 1415 rmixl_pcie_link_intr_t *lip = arg; 1416 u_int link = lip->link; 1417 int rv = 0; 1418 1419 uint32_t status0 = RMIXL_IOREG_READ(RMIXL_IO_DEV_PCIE_LE + int_sts_offset[link].r0); 1420 uint32_t status1 = RMIXL_IOREG_READ(RMIXL_IO_DEV_PCIE_LE + int_sts_offset[link].r1); 1421 uint64_t status = ((uint64_t)status1 << 32) | status0; 1422 DPRINTF(("%s: %d:%#"PRIx64"\n", __func__, link, status)); 1423 1424 if (status != 0) { 1425 rmixl_pcie_link_dispatch_t *dip; 1426 1427 if (status & RMIXL_PCIE_LINK_STATUS_ERRORS) 1428 rmixl_pcie_link_error_intr(link, status0, status1); 1429 1430 for (u_int i=0; i < lip->dispatch_count; i++) { 1431 dip = &lip->dispatch_data[i]; 1432 int (*func)(void *) = dip->func; 1433 if (func != NULL) { 1434 uint64_t bit = 1 << dip->bitno; 1435 if ((status & bit) != 0) { 1436 (void)(*func)(dip->arg); 1437 dip->counts[cpu_index(curcpu())].evcnt.ev_count++; 1438 rv = 1; 1439 } 1440 } 1441 } 1442 } 1443 1444 return rv; 1445 } 1446 1447 static void 1448 rmixl_pcie_link_error_intr(u_int link, uint32_t status0, uint32_t status1) 1449 { 1450 printf("%s: mask %#"PRIx64"\n", 1451 __func__, RMIXL_PCIE_LINK_STATUS_ERRORS); 1452 printf("%s: PCIe Link Error: link=%d status0=%#x status1=%#x\n", 1453 __func__, link, status0, status1); 1454 #if defined(DDB) && defined(DEBUG) 1455 Debugger(); 1456 #endif 1457 } 1458 1459 #if defined(DEBUG) || defined(DDB) 1460 /* this function exists to facilitate call from ddb */ 1461 int 1462 rmixl_pcie_error_check(void) 1463 { 1464 if (rmixl_pcie_v != 0) 1465 return _rmixl_pcie_error_check(rmixl_pcie_v); 1466 return -1; 1467 } 1468 #endif 1469 1470 STATIC int 1471 _rmixl_pcie_error_check(void *v) 1472 { 1473 int i, offset; 1474 pcireg_t r; 1475 pcitag_t tag; 1476 int err=0; 1477 #ifdef DIAGNOSTIC 1478 pcireg_t regs[PCIE_ECFG_ERRS_OFFTAB_NENTRIES]; 1479 #endif 1480 1481 tag = rmixl_pcie_make_tag(v, 0, 0, 0); /* XXX */ 1482 1483 for (i=0; i < PCIE_ECFG_ERRS_OFFTAB_NENTRIES; i++) { 1484 offset = pcie_ecfg_errs_tab[i].offset; 1485 r = rmixl_pcie_conf_read(v, tag, offset); 1486 #ifdef DIAGNOSTIC 1487 regs[i] = r; 1488 #endif 1489 if (r != 0) { 1490 pcireg_t rw1c = r & pcie_ecfg_errs_tab[i].rw1c; 1491 if (rw1c != 0) { 1492 /* attempt to clear the error */ 1493 rmixl_pcie_conf_write(v, tag, offset, rw1c); 1494 }; 1495 if (offset == RMIXL_PCIE_ECFG_CESR) 1496 err |= 1; /* correctable */ 1497 else 1498 err |= 2; /* uncorrectable */ 1499 } 1500 } 1501 #ifdef DIAGNOSTIC 1502 if (err != 0) { 1503 for (i=0; i < PCIE_ECFG_ERRS_OFFTAB_NENTRIES; i++) { 1504 offset = pcie_ecfg_errs_tab[i].offset; 1505 printf("%s: %#x: %#x\n", __func__, offset, regs[i]); 1506 } 1507 } 1508 #endif 1509 1510 return err; 1511 } 1512 1513 static int 1514 rmixl_pcie_error_intr(void *v) 1515 { 1516 if (_rmixl_pcie_error_check(v) < 2) 1517 return 0; /* correctable */ 1518 1519 /* uncorrectable */ 1520 #if DDB 1521 Debugger(); 1522 #endif 1523 1524 /* XXX reset and recover? */ 1525 1526 panic("%s\n", __func__); 1527 } 1528 1529 /* 1530 * rmixl_physaddr_init_pcie: 1531 * called from rmixl_physaddr_init to get region addrs & sizes 1532 * from PCIE CFG, ECFG, IO, MEM BARs 1533 */ 1534 void 1535 rmixl_physaddr_init_pcie(struct extent *ext) 1536 { 1537 u_long base; 1538 u_long size; 1539 uint32_t r; 1540 1541 r = RMIXL_IOREG_READ(RMIXLS_SBC_PCIE_CFG_BAR); 1542 if ((r & RMIXL_PCIE_CFG_BAR_ENB) != 0) { 1543 base = (u_long)(RMIXL_PCIE_CFG_BAR_TO_BA((uint64_t)r) 1544 / (1024 * 1024)); 1545 size = (u_long)RMIXL_PCIE_CFG_SIZE / (1024 * 1024); 1546 DPRINTF(("%s: %d: %s: 0x%08x -- 0x%010lx:%ld MB\n", __func__, 1547 __LINE__, "CFG", r, base * 1024 * 1024, size)); 1548 if (extent_alloc_region(ext, base, size, EX_NOWAIT) != 0) 1549 panic("%s: extent_alloc_region(%p, %#lx, %#lx, %#x) " 1550 "failed", __func__, ext, base, size, EX_NOWAIT); 1551 } 1552 1553 r = RMIXL_IOREG_READ(RMIXLS_SBC_PCIE_ECFG_BAR); 1554 if ((r & RMIXL_PCIE_ECFG_BAR_ENB) != 0) { 1555 base = (u_long)(RMIXL_PCIE_ECFG_BAR_TO_BA((uint64_t)r) 1556 / (1024 * 1024)); 1557 size = (u_long)RMIXL_PCIE_ECFG_SIZE / (1024 * 1024); 1558 DPRINTF(("%s: %d: %s: 0x%08x -- 0x%010lx:%ld MB\n", __func__, 1559 __LINE__, "ECFG", r, base * 1024 * 1024, size)); 1560 if (extent_alloc_region(ext, base, size, EX_NOWAIT) != 0) 1561 panic("%s: extent_alloc_region(%p, %#lx, %#lx, %#x) " 1562 "failed", __func__, ext, base, size, EX_NOWAIT); 1563 } 1564 1565 r = RMIXL_IOREG_READ(RMIXLS_SBC_PCIE_MEM_BAR); 1566 if ((r & RMIXL_PCIE_MEM_BAR_ENB) != 0) { 1567 base = (u_long)(RMIXL_PCIE_MEM_BAR_TO_BA((uint64_t)r) 1568 / (1024 * 1024)); 1569 size = (u_long)(RMIXL_PCIE_MEM_BAR_TO_SIZE((uint64_t)r) 1570 / (1024 * 1024)); 1571 DPRINTF(("%s: %d: %s: 0x%08x -- 0x%010lx:%ld MB\n", __func__, 1572 __LINE__, "MEM", r, base * 1024 * 1024, size)); 1573 if (extent_alloc_region(ext, base, size, EX_NOWAIT) != 0) 1574 panic("%s: extent_alloc_region(%p, %#lx, %#lx, %#x) " 1575 "failed", __func__, ext, base, size, EX_NOWAIT); 1576 } 1577 1578 r = RMIXL_IOREG_READ(RMIXLS_SBC_PCIE_IO_BAR); 1579 if ((r & RMIXL_PCIE_IO_BAR_ENB) != 0) { 1580 base = (u_long)(RMIXL_PCIE_IO_BAR_TO_BA((uint64_t)r) 1581 / (1024 * 1024)); 1582 size = (u_long)(RMIXL_PCIE_IO_BAR_TO_SIZE((uint64_t)r) 1583 / (1024 * 1024)); 1584 DPRINTF(("%s: %d: %s: 0x%08x -- 0x%010lx:%ld MB\n", __func__, 1585 __LINE__, "IO", r, base * 1024 * 1024, size)); 1586 if (extent_alloc_region(ext, base, size, EX_NOWAIT) != 0) 1587 panic("%s: extent_alloc_region(%p, %#lx, %#lx, %#x) " 1588 "failed", __func__, ext, base, size, EX_NOWAIT); 1589 } 1590 } 1591
Indexes created Mon Sep 22 10:09:38 GMT 2025