1 /* 2 * Linux driver attachment glue for PCI based U320 controllers. 3 * 4 * Copyright (c) 2000-2001 Adaptec Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * substantially similar to the "NO WARRANTY" disclaimer below 15 * ("Disclaimer") and any redistribution must be conditioned upon 16 * including a substantially similar Disclaimer requirement for further 17 * binary redistribution. 18 * 3. Neither the names of the above-listed copyright holders nor the names 19 * of any contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * Alternatively, this software may be distributed under the terms of the 23 * GNU General Public License ("GPL") version 2 as published by the Free 24 * Software Foundation. 25 * 26 * NO WARRANTY 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGES. 38 * 39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm_pci.c#25 $ 40 */ 41 42 #include "aic79xx_osm.h" 43 #include "aic79xx_inline.h" 44 #include "aic79xx_pci.h" 45 46 static int ahd_linux_pci_dev_probe(struct pci_dev *pdev, 47 const struct pci_device_id *ent); 48 static int ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, 49 u_long *base, u_long *base2); 50 static int ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd, 51 u_long *bus_addr, 52 uint8_t __iomem **maddr); 53 static void ahd_linux_pci_dev_remove(struct pci_dev *pdev); 54 55 /* Define the macro locally since it's different for different class of chips. 56 */ 57 #define ID(x) \ 58 ID2C(x), \ 59 ID2C(IDIROC(x)) 60 61 static struct pci_device_id ahd_linux_pci_id_table[] = { 62 /* aic7901 based controllers */ 63 ID(ID_AHA_29320A), 64 ID(ID_AHA_29320ALP), 65 /* aic7902 based controllers */ 66 ID(ID_AHA_29320), 67 ID(ID_AHA_29320B), 68 ID(ID_AHA_29320LP), 69 ID(ID_AHA_39320), 70 ID(ID_AHA_39320_B), 71 ID(ID_AHA_39320A), 72 ID(ID_AHA_39320D), 73 ID(ID_AHA_39320D_HP), 74 ID(ID_AHA_39320D_B), 75 ID(ID_AHA_39320D_B_HP), 76 /* Generic chip probes for devices we don't know exactly. */ 77 ID16(ID_AIC7901 & ID_9005_GENERIC_MASK), 78 ID(ID_AIC7901A & ID_DEV_VENDOR_MASK), 79 ID16(ID_AIC7902 & ID_9005_GENERIC_MASK), 80 { 0 } 81 }; 82 83 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table); 84 85 struct pci_driver aic79xx_pci_driver = { 86 .name = "aic79xx", 87 .probe = ahd_linux_pci_dev_probe, 88 .remove = ahd_linux_pci_dev_remove, 89 .id_table = ahd_linux_pci_id_table 90 }; 91 92 static void 93 ahd_linux_pci_dev_remove(struct pci_dev *pdev) 94 { 95 struct ahd_softc *ahd; 96 u_long l; 97 98 /* 99 * We should be able to just perform 100 * the free directly, but check our 101 * list for extra sanity. 102 */ 103 ahd_list_lock(&l); 104 ahd = ahd_find_softc((struct ahd_softc *)pci_get_drvdata(pdev)); 105 if (ahd != NULL) { 106 u_long s; 107 108 TAILQ_REMOVE(&ahd_tailq, ahd, links); 109 ahd_list_unlock(&l); 110 ahd_lock(ahd, &s); 111 ahd_intr_enable(ahd, FALSE); 112 ahd_unlock(ahd, &s); 113 ahd_free(ahd); 114 } else 115 ahd_list_unlock(&l); 116 } 117 118 static int 119 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 120 { 121 char buf[80]; 122 struct ahd_softc *ahd; 123 ahd_dev_softc_t pci; 124 struct ahd_pci_identity *entry; 125 char *name; 126 int error; 127 128 /* 129 * Some BIOSen report the same device multiple times. 130 */ 131 TAILQ_FOREACH(ahd, &ahd_tailq, links) { 132 struct pci_dev *probed_pdev; 133 134 probed_pdev = ahd->dev_softc; 135 if (probed_pdev->bus->number == pdev->bus->number 136 && probed_pdev->devfn == pdev->devfn) 137 break; 138 } 139 if (ahd != NULL) { 140 /* Skip duplicate. */ 141 return (-ENODEV); 142 } 143 144 pci = pdev; 145 entry = ahd_find_pci_device(pci); 146 if (entry == NULL) 147 return (-ENODEV); 148 149 /* 150 * Allocate a softc for this card and 151 * set it up for attachment by our 152 * common detect routine. 153 */ 154 sprintf(buf, "ahd_pci:%d:%d:%d", 155 ahd_get_pci_bus(pci), 156 ahd_get_pci_slot(pci), 157 ahd_get_pci_function(pci)); 158 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 159 if (name == NULL) 160 return (-ENOMEM); 161 strcpy(name, buf); 162 ahd = ahd_alloc(NULL, name); 163 if (ahd == NULL) 164 return (-ENOMEM); 165 if (pci_enable_device(pdev)) { 166 ahd_free(ahd); 167 return (-ENODEV); 168 } 169 pci_set_master(pdev); 170 171 if (sizeof(dma_addr_t) > 4) { 172 uint64_t memsize; 173 const uint64_t mask_39bit = 0x7FFFFFFFFFULL; 174 175 memsize = ahd_linux_get_memsize(); 176 177 if (memsize >= 0x8000000000ULL 178 && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) { 179 ahd->flags |= AHD_64BIT_ADDRESSING; 180 ahd->platform_data->hw_dma_mask = DMA_64BIT_MASK; 181 } else if (memsize > 0x80000000 182 && pci_set_dma_mask(pdev, mask_39bit) == 0) { 183 ahd->flags |= AHD_39BIT_ADDRESSING; 184 ahd->platform_data->hw_dma_mask = mask_39bit; 185 } 186 } else { 187 pci_set_dma_mask(pdev, DMA_32BIT_MASK); 188 ahd->platform_data->hw_dma_mask = DMA_32BIT_MASK; 189 } 190 ahd->dev_softc = pci; 191 error = ahd_pci_config(ahd, entry); 192 if (error != 0) { 193 ahd_free(ahd); 194 return (-error); 195 } 196 pci_set_drvdata(pdev, ahd); 197 if (aic79xx_detect_complete) { 198 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) 199 ahd_linux_register_host(ahd, &aic79xx_driver_template); 200 #else 201 printf("aic79xx: ignoring PCI device found after " 202 "initialization\n"); 203 return (-ENODEV); 204 #endif 205 } 206 return (0); 207 } 208 209 int 210 ahd_linux_pci_init(void) 211 { 212 return (pci_module_init(&aic79xx_pci_driver)); 213 } 214 215 void 216 ahd_linux_pci_exit(void) 217 { 218 pci_unregister_driver(&aic79xx_pci_driver); 219 } 220 221 static int 222 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base, 223 u_long *base2) 224 { 225 *base = pci_resource_start(ahd->dev_softc, 0); 226 /* 227 * This is really the 3rd bar and should be at index 2, 228 * but the Linux PCI code doesn't know how to "count" 64bit 229 * bars. 230 */ 231 *base2 = pci_resource_start(ahd->dev_softc, 3); 232 if (*base == 0 || *base2 == 0) 233 return (ENOMEM); 234 if (request_region(*base, 256, "aic79xx") == 0) 235 return (ENOMEM); 236 if (request_region(*base2, 256, "aic79xx") == 0) { 237 release_region(*base2, 256); 238 return (ENOMEM); 239 } 240 return (0); 241 } 242 243 static int 244 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd, 245 u_long *bus_addr, 246 uint8_t __iomem **maddr) 247 { 248 u_long start; 249 u_long base_page; 250 u_long base_offset; 251 int error; 252 253 if (aic79xx_allow_memio == 0) 254 return (ENOMEM); 255 256 if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0) 257 return (ENOMEM); 258 259 error = 0; 260 start = pci_resource_start(ahd->dev_softc, 1); 261 base_page = start & PAGE_MASK; 262 base_offset = start - base_page; 263 if (start != 0) { 264 *bus_addr = start; 265 if (request_mem_region(start, 0x1000, "aic79xx") == 0) 266 error = ENOMEM; 267 if (error == 0) { 268 *maddr = ioremap_nocache(base_page, base_offset + 256); 269 if (*maddr == NULL) { 270 error = ENOMEM; 271 release_mem_region(start, 0x1000); 272 } else 273 *maddr += base_offset; 274 } 275 } else 276 error = ENOMEM; 277 return (error); 278 } 279 280 int 281 ahd_pci_map_registers(struct ahd_softc *ahd) 282 { 283 uint32_t command; 284 u_long base; 285 uint8_t __iomem *maddr; 286 int error; 287 288 /* 289 * If its allowed, we prefer memory mapped access. 290 */ 291 command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4); 292 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 293 base = 0; 294 maddr = NULL; 295 error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr); 296 if (error == 0) { 297 ahd->platform_data->mem_busaddr = base; 298 ahd->tags[0] = BUS_SPACE_MEMIO; 299 ahd->bshs[0].maddr = maddr; 300 ahd->tags[1] = BUS_SPACE_MEMIO; 301 ahd->bshs[1].maddr = maddr + 0x100; 302 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, 303 command | PCIM_CMD_MEMEN, 4); 304 305 if (ahd_pci_test_register_access(ahd) != 0) { 306 307 printf("aic79xx: PCI Device %d:%d:%d " 308 "failed memory mapped test. Using PIO.\n", 309 ahd_get_pci_bus(ahd->dev_softc), 310 ahd_get_pci_slot(ahd->dev_softc), 311 ahd_get_pci_function(ahd->dev_softc)); 312 iounmap(maddr); 313 release_mem_region(ahd->platform_data->mem_busaddr, 314 0x1000); 315 ahd->bshs[0].maddr = NULL; 316 maddr = NULL; 317 } else 318 command |= PCIM_CMD_MEMEN; 319 } else if (bootverbose) { 320 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx " 321 "unavailable. Cannot memory map device.\n", 322 ahd_get_pci_bus(ahd->dev_softc), 323 ahd_get_pci_slot(ahd->dev_softc), 324 ahd_get_pci_function(ahd->dev_softc), 325 base); 326 } 327 328 if (maddr == NULL) { 329 u_long base2; 330 331 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2); 332 if (error == 0) { 333 ahd->tags[0] = BUS_SPACE_PIO; 334 ahd->tags[1] = BUS_SPACE_PIO; 335 ahd->bshs[0].ioport = base; 336 ahd->bshs[1].ioport = base2; 337 command |= PCIM_CMD_PORTEN; 338 } else { 339 printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx" 340 "unavailable. Cannot map device.\n", 341 ahd_get_pci_bus(ahd->dev_softc), 342 ahd_get_pci_slot(ahd->dev_softc), 343 ahd_get_pci_function(ahd->dev_softc), 344 base, base2); 345 } 346 } 347 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4); 348 return (error); 349 } 350 351 int 352 ahd_pci_map_int(struct ahd_softc *ahd) 353 { 354 int error; 355 356 error = request_irq(ahd->dev_softc->irq, ahd_linux_isr, 357 SA_SHIRQ, "aic79xx", ahd); 358 if (error == 0) 359 ahd->platform_data->irq = ahd->dev_softc->irq; 360 361 return (-error); 362 } 363 364 void 365 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state) 366 { 367 pci_set_power_state(ahd->dev_softc, new_state); 368 } 369