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 ID(ID_AHA_29320LPE), 66 /* aic7902 based controllers */ 67 ID(ID_AHA_29320), 68 ID(ID_AHA_29320B), 69 ID(ID_AHA_29320LP), 70 ID(ID_AHA_39320), 71 ID(ID_AHA_39320_B), 72 ID(ID_AHA_39320A), 73 ID(ID_AHA_39320D), 74 ID(ID_AHA_39320D_HP), 75 ID(ID_AHA_39320D_B), 76 ID(ID_AHA_39320D_B_HP), 77 /* Generic chip probes for devices we don't know exactly. */ 78 ID16(ID_AIC7901 & ID_9005_GENERIC_MASK), 79 ID(ID_AIC7901A & ID_DEV_VENDOR_MASK), 80 ID16(ID_AIC7902 & ID_9005_GENERIC_MASK), 81 { 0 } 82 }; 83 84 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table); 85 86 static struct pci_driver aic79xx_pci_driver = { 87 .name = "aic79xx", 88 .probe = ahd_linux_pci_dev_probe, 89 .remove = ahd_linux_pci_dev_remove, 90 .id_table = ahd_linux_pci_id_table 91 }; 92 93 static void 94 ahd_linux_pci_dev_remove(struct pci_dev *pdev) 95 { 96 struct ahd_softc *ahd = pci_get_drvdata(pdev); 97 u_long s; 98 99 if (ahd->platform_data && ahd->platform_data->host) 100 scsi_remove_host(ahd->platform_data->host); 101 102 ahd_lock(ahd, &s); 103 ahd_intr_enable(ahd, FALSE); 104 ahd_unlock(ahd, &s); 105 ahd_free(ahd); 106 } 107 108 static void 109 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd) 110 { 111 struct pci_dev *pdev = ahd->dev_softc, *master_pdev; 112 unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); 113 114 master_pdev = pci_get_slot(pdev->bus, master_devfn); 115 if (master_pdev) { 116 struct ahd_softc *master = pci_get_drvdata(master_pdev); 117 if (master) { 118 ahd->flags &= ~AHD_BIOS_ENABLED; 119 ahd->flags |= master->flags & AHD_BIOS_ENABLED; 120 } else 121 printk(KERN_ERR "aic79xx: no multichannel peer found!\n"); 122 pci_dev_put(master_pdev); 123 } 124 } 125 126 static int 127 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 128 { 129 char buf[80]; 130 struct ahd_softc *ahd; 131 ahd_dev_softc_t pci; 132 struct ahd_pci_identity *entry; 133 char *name; 134 int error; 135 struct device *dev = &pdev->dev; 136 137 pci = pdev; 138 entry = ahd_find_pci_device(pci); 139 if (entry == NULL) 140 return (-ENODEV); 141 142 /* 143 * Allocate a softc for this card and 144 * set it up for attachment by our 145 * common detect routine. 146 */ 147 sprintf(buf, "ahd_pci:%d:%d:%d", 148 ahd_get_pci_bus(pci), 149 ahd_get_pci_slot(pci), 150 ahd_get_pci_function(pci)); 151 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 152 if (name == NULL) 153 return (-ENOMEM); 154 strcpy(name, buf); 155 ahd = ahd_alloc(NULL, name); 156 if (ahd == NULL) 157 return (-ENOMEM); 158 if (pci_enable_device(pdev)) { 159 ahd_free(ahd); 160 return (-ENODEV); 161 } 162 pci_set_master(pdev); 163 164 if (sizeof(dma_addr_t) > 4) { 165 const u64 required_mask = dma_get_required_mask(dev); 166 167 if (required_mask > DMA_39BIT_MASK && 168 dma_set_mask(dev, DMA_64BIT_MASK) == 0) 169 ahd->flags |= AHD_64BIT_ADDRESSING; 170 else if (required_mask > DMA_32BIT_MASK && 171 dma_set_mask(dev, DMA_39BIT_MASK) == 0) 172 ahd->flags |= AHD_39BIT_ADDRESSING; 173 else 174 dma_set_mask(dev, DMA_32BIT_MASK); 175 } else { 176 dma_set_mask(dev, DMA_32BIT_MASK); 177 } 178 ahd->dev_softc = pci; 179 error = ahd_pci_config(ahd, entry); 180 if (error != 0) { 181 ahd_free(ahd); 182 return (-error); 183 } 184 185 /* 186 * Second Function PCI devices need to inherit some 187 * * settings from function 0. 188 */ 189 if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0) 190 ahd_linux_pci_inherit_flags(ahd); 191 192 pci_set_drvdata(pdev, ahd); 193 194 ahd_linux_register_host(ahd, &aic79xx_driver_template); 195 return (0); 196 } 197 198 int 199 ahd_linux_pci_init(void) 200 { 201 return pci_register_driver(&aic79xx_pci_driver); 202 } 203 204 void 205 ahd_linux_pci_exit(void) 206 { 207 pci_unregister_driver(&aic79xx_pci_driver); 208 } 209 210 static int 211 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base, 212 u_long *base2) 213 { 214 *base = pci_resource_start(ahd->dev_softc, 0); 215 /* 216 * This is really the 3rd bar and should be at index 2, 217 * but the Linux PCI code doesn't know how to "count" 64bit 218 * bars. 219 */ 220 *base2 = pci_resource_start(ahd->dev_softc, 3); 221 if (*base == 0 || *base2 == 0) 222 return (ENOMEM); 223 if (!request_region(*base, 256, "aic79xx")) 224 return (ENOMEM); 225 if (!request_region(*base2, 256, "aic79xx")) { 226 release_region(*base, 256); 227 return (ENOMEM); 228 } 229 return (0); 230 } 231 232 static int 233 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd, 234 u_long *bus_addr, 235 uint8_t __iomem **maddr) 236 { 237 u_long start; 238 u_long base_page; 239 u_long base_offset; 240 int error = 0; 241 242 if (aic79xx_allow_memio == 0) 243 return (ENOMEM); 244 245 if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0) 246 return (ENOMEM); 247 248 start = pci_resource_start(ahd->dev_softc, 1); 249 base_page = start & PAGE_MASK; 250 base_offset = start - base_page; 251 if (start != 0) { 252 *bus_addr = start; 253 if (!request_mem_region(start, 0x1000, "aic79xx")) 254 error = ENOMEM; 255 if (!error) { 256 *maddr = ioremap_nocache(base_page, base_offset + 512); 257 if (*maddr == NULL) { 258 error = ENOMEM; 259 release_mem_region(start, 0x1000); 260 } else 261 *maddr += base_offset; 262 } 263 } else 264 error = ENOMEM; 265 return (error); 266 } 267 268 int 269 ahd_pci_map_registers(struct ahd_softc *ahd) 270 { 271 uint32_t command; 272 u_long base; 273 uint8_t __iomem *maddr; 274 int error; 275 276 /* 277 * If its allowed, we prefer memory mapped access. 278 */ 279 command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4); 280 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 281 base = 0; 282 maddr = NULL; 283 error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr); 284 if (error == 0) { 285 ahd->platform_data->mem_busaddr = base; 286 ahd->tags[0] = BUS_SPACE_MEMIO; 287 ahd->bshs[0].maddr = maddr; 288 ahd->tags[1] = BUS_SPACE_MEMIO; 289 ahd->bshs[1].maddr = maddr + 0x100; 290 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, 291 command | PCIM_CMD_MEMEN, 4); 292 293 if (ahd_pci_test_register_access(ahd) != 0) { 294 295 printf("aic79xx: PCI Device %d:%d:%d " 296 "failed memory mapped test. Using PIO.\n", 297 ahd_get_pci_bus(ahd->dev_softc), 298 ahd_get_pci_slot(ahd->dev_softc), 299 ahd_get_pci_function(ahd->dev_softc)); 300 iounmap(maddr); 301 release_mem_region(ahd->platform_data->mem_busaddr, 302 0x1000); 303 ahd->bshs[0].maddr = NULL; 304 maddr = NULL; 305 } else 306 command |= PCIM_CMD_MEMEN; 307 } else if (bootverbose) { 308 printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx " 309 "unavailable. Cannot memory map device.\n", 310 ahd_get_pci_bus(ahd->dev_softc), 311 ahd_get_pci_slot(ahd->dev_softc), 312 ahd_get_pci_function(ahd->dev_softc), 313 base); 314 } 315 316 if (maddr == NULL) { 317 u_long base2; 318 319 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2); 320 if (error == 0) { 321 ahd->tags[0] = BUS_SPACE_PIO; 322 ahd->tags[1] = BUS_SPACE_PIO; 323 ahd->bshs[0].ioport = base; 324 ahd->bshs[1].ioport = base2; 325 command |= PCIM_CMD_PORTEN; 326 } else { 327 printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx" 328 "unavailable. Cannot map device.\n", 329 ahd_get_pci_bus(ahd->dev_softc), 330 ahd_get_pci_slot(ahd->dev_softc), 331 ahd_get_pci_function(ahd->dev_softc), 332 base, base2); 333 } 334 } 335 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4); 336 return (error); 337 } 338 339 int 340 ahd_pci_map_int(struct ahd_softc *ahd) 341 { 342 int error; 343 344 error = request_irq(ahd->dev_softc->irq, ahd_linux_isr, 345 IRQF_SHARED, "aic79xx", ahd); 346 if (!error) 347 ahd->platform_data->irq = ahd->dev_softc->irq; 348 349 return (-error); 350 } 351 352 void 353 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state) 354 { 355 pci_set_power_state(ahd->dev_softc, new_state); 356 } 357