Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mps/mps_pci.c
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1 /*- 2 * Copyright (c) 2009 Yahoo! Inc. 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: releng/9.0/sys/dev/mps/mps_pci.c 216088 2010-11-30 22:39:46Z ken $"); 29 30 /* PCI/PCI-X/PCIe bus interface for the LSI MPT2 controllers */ 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/conf.h> 39 #include <sys/malloc.h> 40 #include <sys/sysctl.h> 41 #include <sys/uio.h> 42 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <sys/rman.h> 46 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcivar.h> 49 50 #include <dev/mps/mpi/mpi2_type.h> 51 #include <dev/mps/mpi/mpi2.h> 52 #include <dev/mps/mpi/mpi2_ioc.h> 53 #include <dev/mps/mpi/mpi2_cnfg.h> 54 55 #include <dev/mps/mpsvar.h> 56 57 static int mps_pci_probe(device_t); 58 static int mps_pci_attach(device_t); 59 static int mps_pci_detach(device_t); 60 static int mps_pci_suspend(device_t); 61 static int mps_pci_resume(device_t); 62 static void mps_pci_free(struct mps_softc *); 63 static int mps_alloc_msix(struct mps_softc *sc, int msgs); 64 static int mps_alloc_msi(struct mps_softc *sc, int msgs); 65 66 int mps_disable_msix = 0; 67 TUNABLE_INT("hw.mps.disable_msix", &mps_disable_msix); 68 SYSCTL_INT(_hw_mps, OID_AUTO, disable_msix, CTLFLAG_RD, &mps_disable_msix, 0, 69 "Disable MSIX interrupts\n"); 70 int mps_disable_msi = 0; 71 TUNABLE_INT("hw.mps.disable_msi", &mps_disable_msi); 72 SYSCTL_INT(_hw_mps, OID_AUTO, disable_msi, CTLFLAG_RD, &mps_disable_msi, 0, 73 "Disable MSI interrupts\n"); 74 75 static device_method_t mps_methods[] = { 76 DEVMETHOD(device_probe, mps_pci_probe), 77 DEVMETHOD(device_attach, mps_pci_attach), 78 DEVMETHOD(device_detach, mps_pci_detach), 79 DEVMETHOD(device_suspend, mps_pci_suspend), 80 DEVMETHOD(device_resume, mps_pci_resume), 81 DEVMETHOD(bus_print_child, bus_generic_print_child), 82 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 83 { 0, 0 } 84 }; 85 86 static driver_t mps_pci_driver = { 87 "mps", 88 mps_methods, 89 sizeof(struct mps_softc) 90 }; 91 92 static devclass_t mps_devclass; 93 DRIVER_MODULE(mps, pci, mps_pci_driver, mps_devclass, 0, 0); 94 95 struct mps_ident { 96 uint16_t vendor; 97 uint16_t device; 98 uint16_t subvendor; 99 uint16_t subdevice; 100 u_int flags; 101 const char *desc; 102 } mps_identifiers[] = { 103 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2004, 104 0xffff, 0xffff, 0, "LSI SAS2004" }, 105 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2008, 106 0xffff, 0xffff, 0, "LSI SAS2008" }, 107 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_1, 108 0xffff, 0xffff, 0, "LSI SAS2108" }, 109 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_2, 110 0xffff, 0xffff, 0, "LSI SAS2108" }, 111 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_3, 112 0xffff, 0xffff, 0, "LSI SAS2108" }, 113 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_1, 114 0xffff, 0xffff, 0, "LSI SAS2116" }, 115 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_2, 116 0xffff, 0xffff, 0, "LSI SAS2116" }, 117 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_1, 118 0xffff, 0xffff, 0, "LSI SAS2208" }, 119 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_2, 120 0xffff, 0xffff, 0, "LSI SAS2208" }, 121 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_3, 122 0xffff, 0xffff, 0, "LSI SAS2208" }, 123 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_4, 124 0xffff, 0xffff, 0, "LSI SAS2208" }, 125 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_5, 126 0xffff, 0xffff, 0, "LSI SAS2208" }, 127 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_6, 128 0xffff, 0xffff, 0, "LSI SAS2208" }, 129 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_7, 130 0xffff, 0xffff, 0, "LSI SAS2208" }, 131 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_8, 132 0xffff, 0xffff, 0, "LSI SAS2208" }, 133 { 0, 0, 0, 0, 0, NULL } 134 }; 135 136 static struct mps_ident * 137 mps_find_ident(device_t dev) 138 { 139 struct mps_ident *m; 140 141 for (m = mps_identifiers; m->vendor != 0; m++) { 142 if (m->vendor != pci_get_vendor(dev)) 143 continue; 144 if (m->device != pci_get_device(dev)) 145 continue; 146 if ((m->subvendor != 0xffff) && 147 (m->subvendor != pci_get_subvendor(dev))) 148 continue; 149 if ((m->subdevice != 0xffff) && 150 (m->subdevice != pci_get_subdevice(dev))) 151 continue; 152 return (m); 153 } 154 155 return (NULL); 156 } 157 158 static int 159 mps_pci_probe(device_t dev) 160 { 161 struct mps_ident *id; 162 163 if ((id = mps_find_ident(dev)) != NULL) { 164 device_set_desc(dev, id->desc); 165 return (BUS_PROBE_DEFAULT); 166 } 167 return (ENXIO); 168 } 169 170 static int 171 mps_pci_attach(device_t dev) 172 { 173 struct mps_softc *sc; 174 struct mps_ident *m; 175 uint16_t command; 176 int error; 177 178 sc = device_get_softc(dev); 179 bzero(sc, sizeof(*sc)); 180 sc->mps_dev = dev; 181 m = mps_find_ident(dev); 182 sc->mps_flags = m->flags; 183 184 /* Twiddle basic PCI config bits for a sanity check */ 185 command = pci_read_config(dev, PCIR_COMMAND, 2); 186 command |= PCIM_CMD_BUSMASTEREN; 187 pci_write_config(dev, PCIR_COMMAND, command, 2); 188 command = pci_read_config(dev, PCIR_COMMAND, 2); 189 if ((command & PCIM_CMD_BUSMASTEREN) == 0) { 190 device_printf(dev, "Cannot enable PCI busmaster\n"); 191 return (ENXIO); 192 } 193 if ((command & PCIM_CMD_MEMEN) == 0) { 194 device_printf(dev, "PCI memory window not available\n"); 195 return (ENXIO); 196 } 197 198 /* Allocate the System Interface Register Set */ 199 sc->mps_regs_rid = PCIR_BAR(1); 200 if ((sc->mps_regs_resource = bus_alloc_resource_any(dev, 201 SYS_RES_MEMORY, &sc->mps_regs_rid, RF_ACTIVE)) == NULL) { 202 device_printf(dev, "Cannot allocate PCI registers\n"); 203 return (ENXIO); 204 } 205 sc->mps_btag = rman_get_bustag(sc->mps_regs_resource); 206 sc->mps_bhandle = rman_get_bushandle(sc->mps_regs_resource); 207 208 /* Allocate the parent DMA tag */ 209 if (bus_dma_tag_create( NULL, /* parent */ 210 1, 0, /* algnmnt, boundary */ 211 BUS_SPACE_MAXADDR, /* lowaddr */ 212 BUS_SPACE_MAXADDR, /* highaddr */ 213 NULL, NULL, /* filter, filterarg */ 214 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */ 215 BUS_SPACE_UNRESTRICTED, /* nsegments */ 216 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */ 217 0, /* flags */ 218 NULL, NULL, /* lockfunc, lockarg */ 219 &sc->mps_parent_dmat)) { 220 device_printf(dev, "Cannot allocate parent DMA tag\n"); 221 mps_pci_free(sc); 222 return (ENOMEM); 223 } 224 225 if ((error = mps_attach(sc)) != 0) 226 mps_pci_free(sc); 227 228 return (error); 229 } 230 231 int 232 mps_pci_setup_interrupts(struct mps_softc *sc) 233 { 234 device_t dev; 235 int i, error, msgs; 236 237 dev = sc->mps_dev; 238 error = ENXIO; 239 if ((mps_disable_msix == 0) && 240 ((msgs = pci_msix_count(dev)) >= MPS_MSI_COUNT)) 241 error = mps_alloc_msix(sc, MPS_MSI_COUNT); 242 if ((error != 0) && (mps_disable_msi == 0) && 243 ((msgs = pci_msi_count(dev)) >= MPS_MSI_COUNT)) 244 error = mps_alloc_msi(sc, MPS_MSI_COUNT); 245 246 if (error != 0) { 247 sc->mps_flags |= MPS_FLAGS_INTX; 248 sc->mps_irq_rid[0] = 0; 249 sc->mps_irq[0] = bus_alloc_resource_any(dev, SYS_RES_IRQ, 250 &sc->mps_irq_rid[0], RF_SHAREABLE | RF_ACTIVE); 251 if (sc->mps_irq[0] == NULL) { 252 device_printf(dev, "Cannot allocate INTx interrupt\n"); 253 return (ENXIO); 254 } 255 error = bus_setup_intr(dev, sc->mps_irq[0], 256 INTR_TYPE_BIO | INTR_MPSAFE, NULL, mps_intr, sc, 257 &sc->mps_intrhand[0]); 258 if (error) 259 device_printf(dev, "Cannot setup INTx interrupt\n"); 260 } else { 261 sc->mps_flags |= MPS_FLAGS_MSI; 262 for (i = 0; i < MPS_MSI_COUNT; i++) { 263 sc->mps_irq_rid[i] = i + 1; 264 sc->mps_irq[i] = bus_alloc_resource_any(dev, 265 SYS_RES_IRQ, &sc->mps_irq_rid[i], RF_ACTIVE); 266 if (sc->mps_irq[i] == NULL) { 267 device_printf(dev, 268 "Cannot allocate MSI interrupt\n"); 269 return (ENXIO); 270 } 271 error = bus_setup_intr(dev, sc->mps_irq[i], 272 INTR_TYPE_BIO | INTR_MPSAFE, NULL, mps_intr_msi, 273 sc, &sc->mps_intrhand[i]); 274 if (error) { 275 device_printf(dev, 276 "Cannot setup MSI interrupt %d\n", i); 277 break; 278 } 279 } 280 } 281 282 return (error); 283 } 284 285 static int 286 mps_pci_detach(device_t dev) 287 { 288 struct mps_softc *sc; 289 int error; 290 291 sc = device_get_softc(dev); 292 293 if ((error = mps_free(sc)) != 0) 294 return (error); 295 296 mps_pci_free(sc); 297 return (0); 298 } 299 300 static void 301 mps_pci_free(struct mps_softc *sc) 302 { 303 int i; 304 305 if (sc->mps_parent_dmat != NULL) { 306 bus_dma_tag_destroy(sc->mps_parent_dmat); 307 } 308 309 if (sc->mps_flags & MPS_FLAGS_MSI) { 310 for (i = 0; i < MPS_MSI_COUNT; i++) { 311 if (sc->mps_irq[i] != NULL) { 312 bus_teardown_intr(sc->mps_dev, sc->mps_irq[i], 313 sc->mps_intrhand[i]); 314 bus_release_resource(sc->mps_dev, SYS_RES_IRQ, 315 sc->mps_irq_rid[i], sc->mps_irq[i]); 316 } 317 } 318 pci_release_msi(sc->mps_dev); 319 } 320 321 if (sc->mps_flags & MPS_FLAGS_INTX) { 322 bus_teardown_intr(sc->mps_dev, sc->mps_irq[0], 323 sc->mps_intrhand[0]); 324 bus_release_resource(sc->mps_dev, SYS_RES_IRQ, 325 sc->mps_irq_rid[0], sc->mps_irq[0]); 326 } 327 328 if (sc->mps_regs_resource != NULL) { 329 bus_release_resource(sc->mps_dev, SYS_RES_MEMORY, 330 sc->mps_regs_rid, sc->mps_regs_resource); 331 } 332 333 return; 334 } 335 336 static int 337 mps_pci_suspend(device_t dev) 338 { 339 return (EINVAL); 340 } 341 342 static int 343 mps_pci_resume(device_t dev) 344 { 345 return (EINVAL); 346 } 347 348 static int 349 mps_alloc_msix(struct mps_softc *sc, int msgs) 350 { 351 int error; 352 353 error = pci_alloc_msix(sc->mps_dev, &msgs); 354 return (error); 355 } 356 357 static int 358 mps_alloc_msi(struct mps_softc *sc, int msgs) 359 { 360 int error; 361 362 error = pci_alloc_msi(sc->mps_dev, &msgs); 363 return (error); 364 } 365
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