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 = pci_get_drvdata(pdev); 96 u_long s; 97 98 ahd_lock(ahd, &s); 99 ahd_intr_enable(ahd, FALSE); 100 ahd_unlock(ahd, &s); 101 ahd_free(ahd); 102 } 103 104 static void 105 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd) 106 { 107 struct pci_dev *pdev = ahd->dev_softc, *master_pdev; 108 unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); 109 110 master_pdev = pci_get_slot(pdev->bus, master_devfn); 111 if (master_pdev) { 112 struct ahd_softc *master = pci_get_drvdata(master_pdev); 113 if (master) { 114 ahd->flags &= ~AHD_BIOS_ENABLED; 115 ahd->flags |= master->flags & AHD_BIOS_ENABLED; 116 } else 117 printk(KERN_ERR "aic79xx: no multichannel peer found!\n"); 118 pci_dev_put(master_pdev); 119 } 120 } 121 122 static int 123 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 124 { 125 char buf[80]; 126 struct ahd_softc *ahd; 127 ahd_dev_softc_t pci; 128 struct ahd_pci_identity *entry; 129 char *name; 130 int error; 131 132 pci = pdev; 133 entry = ahd_find_pci_device(pci); 134 if (entry == NULL) 135 return (-ENODEV); 136 137 /* 138 * Allocate a softc for this card and 139 * set it up for attachment by our 140 * common detect routine. 141 */ 142 sprintf(buf, "ahd_pci:%d:%d:%d", 143 ahd_get_pci_bus(pci), 144 ahd_get_pci_slot(pci), 145 ahd_get_pci_function(pci)); 146 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 147 if (name == NULL) 148 return (-ENOMEM); 149 strcpy(name, buf); 150 ahd = ahd_alloc(NULL, name); 151 if (ahd == NULL) 152 return (-ENOMEM); 153 if (pci_enable_device(pdev)) { 154 ahd_free(ahd); 155 return (-ENODEV); 156 } 157 pci_set_master(pdev); 158 159 if (sizeof(dma_addr_t) > 4) { 160 uint64_t memsize; 161 const uint64_t mask_39bit = 0x7FFFFFFFFFULL; 162 163 memsize = ahd_linux_get_memsize(); 164 165 if (memsize >= 0x8000000000ULL 166 && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) { 167 ahd->flags |= AHD_64BIT_ADDRESSING; 168 } else if (memsize > 0x80000000 169 && pci_set_dma_mask(pdev, mask_39bit) == 0) { 170 ahd->flags |= AHD_39BIT_ADDRESSING; 171 } 172 } else { 173 pci_set_dma_mask(pdev, DMA_32BIT_MASK); 174 } 175 ahd->dev_softc = pci; 176 error = ahd_pci_config(ahd, entry); 177 if (error != 0) { 178 ahd_free(ahd); 179 return (-error); 180 } 181 182 /* 183 * Second Function PCI devices need to inherit some 184 * * settings from function 0. 185 */ 186 if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0) 187 ahd_linux_pci_inherit_flags(ahd); 188 189 pci_set_drvdata(pdev, ahd); 190 191 ahd_linux_register_host(ahd, &aic79xx_driver_template); 192 return (0); 193 } 194 195 int 196 ahd_linux_pci_init(void) 197 { 198 return (pci_module_init(&aic79xx_pci_driver)); 199 } 200 201 void 202 ahd_linux_pci_exit(void) 203 { 204 pci_unregister_driver(&aic79xx_pci_driver); 205 } 206 207 static int 208 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base, 209 u_long *base2) 210 { 211 *base = pci_resource_start(ahd->dev_softc, 0); 212 /* 213 * This is really the 3rd bar and should be at index 2, 214 * but the Linux PCI code doesn't know how to "count" 64bit 215 * bars. 216 */ 217 *base2 = pci_resource_start(ahd->dev_softc, 3); 218 if (*base == 0 || *base2 == 0) 219 return (ENOMEM); 220 if (request_region(*base, 256, "aic79xx") == 0) 221 return (ENOMEM); 222 if (request_region(*base2, 256, "aic79xx") == 0) { 223 release_region(*base2, 256); 224 return (ENOMEM); 225 } 226 return (0); 227 } 228 229 static int 230 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd, 231 u_long *bus_addr, 232 uint8_t __iomem **maddr) 233 { 234 u_long start; 235 u_long base_page; 236 u_long base_offset; 237 int error; 238 239 if (aic79xx_allow_memio == 0) 240 return (ENOMEM); 241 242 if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0) 243 return (ENOMEM); 244 245 error = 0; 246 start = pci_resource_start(ahd->dev_softc, 1); 247 base_page = start & PAGE_MASK; 248 base_offset = start - base_page; 249 if (start != 0) { 250 *bus_addr = start; 251 if (request_mem_region(start, 0x1000, "aic79xx") == 0) 252 error = ENOMEM; 253 if (error == 0) { 254 *maddr = ioremap_nocache(base_page, base_offset + 256); 255 if (*maddr == NULL) { 256 error = ENOMEM; 257 release_mem_region(start, 0x1000); 258 } else 259 *maddr += base_offset; 260 } 261 } else 262 error = ENOMEM; 263 return (error); 264 } 265 266 int 267 ahd_pci_map_registers(struct ahd_softc *ahd) 268 { 269 uint32_t command; 270 u_long base; 271 uint8_t __iomem *maddr; 272 int error; 273 274 /* 275 * If its allowed, we prefer memory mapped access. 276 */ 277 command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4); 278 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 279 base = 0; 280 maddr = NULL; 281 error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr); 282 if (error == 0) { 283 ahd->platform_data->mem_busaddr = base; 284 ahd->tags[0] = BUS_SPACE_MEMIO; 285 ahd->bshs[0].maddr = maddr; 286 ahd->tags[1] = BUS_SPACE_MEMIO; 287 ahd->bshs[1].maddr = maddr + 0x100; 288 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, 289 command | PCIM_CMD_MEMEN, 4); 290 291 if (ahd_pci_test_register_access(ahd) != 0) { 292 293 printf("aic79xx: PCI Device %d:%d:%d " 294 "failed memory mapped test. Using PIO.\n", 295 ahd_get_pci_bus(ahd->dev_softc), 296 ahd_get_pci_slot(ahd->dev_softc), 297 ahd_get_pci_function(ahd->dev_softc)); 298 iounmap(maddr); 299 release_mem_region(ahd->platform_data->mem_busaddr, 300 0x1000); 301 ahd->bshs[0].maddr = NULL; 302 maddr = NULL; 303 } else 304 command |= PCIM_CMD_MEMEN; 305 } else if (bootverbose) { 306 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx " 307 "unavailable. Cannot memory map device.\n", 308 ahd_get_pci_bus(ahd->dev_softc), 309 ahd_get_pci_slot(ahd->dev_softc), 310 ahd_get_pci_function(ahd->dev_softc), 311 base); 312 } 313 314 if (maddr == NULL) { 315 u_long base2; 316 317 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2); 318 if (error == 0) { 319 ahd->tags[0] = BUS_SPACE_PIO; 320 ahd->tags[1] = BUS_SPACE_PIO; 321 ahd->bshs[0].ioport = base; 322 ahd->bshs[1].ioport = base2; 323 command |= PCIM_CMD_PORTEN; 324 } else { 325 printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx" 326 "unavailable. Cannot map device.\n", 327 ahd_get_pci_bus(ahd->dev_softc), 328 ahd_get_pci_slot(ahd->dev_softc), 329 ahd_get_pci_function(ahd->dev_softc), 330 base, base2); 331 } 332 } 333 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4); 334 return (error); 335 } 336 337 int 338 ahd_pci_map_int(struct ahd_softc *ahd) 339 { 340 int error; 341 342 error = request_irq(ahd->dev_softc->irq, ahd_linux_isr, 343 SA_SHIRQ, "aic79xx", ahd); 344 if (error == 0) 345 ahd->platform_data->irq = ahd->dev_softc->irq; 346 347 return (-error); 348 } 349 350 void 351 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state) 352 { 353 pci_set_power_state(ahd->dev_softc, new_state); 354 } 355