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 /* Define the macro locally since it's different for different class of chips. 47 */ 48 #define ID(x) \ 49 ID2C(x), \ 50 ID2C(IDIROC(x)) 51 52 static const struct pci_device_id ahd_linux_pci_id_table[] = { 53 /* aic7901 based controllers */ 54 ID(ID_AHA_29320A), 55 ID(ID_AHA_29320ALP), 56 ID(ID_AHA_29320LPE), 57 /* aic7902 based controllers */ 58 ID(ID_AHA_29320), 59 ID(ID_AHA_29320B), 60 ID(ID_AHA_29320LP), 61 ID(ID_AHA_39320), 62 ID(ID_AHA_39320_B), 63 ID(ID_AHA_39320A), 64 ID(ID_AHA_39320D), 65 ID(ID_AHA_39320D_HP), 66 ID(ID_AHA_39320D_B), 67 ID(ID_AHA_39320D_B_HP), 68 /* Generic chip probes for devices we don't know exactly. */ 69 ID16(ID_AIC7901 & ID_9005_GENERIC_MASK), 70 ID(ID_AIC7901A & ID_DEV_VENDOR_MASK), 71 ID16(ID_AIC7902 & ID_9005_GENERIC_MASK), 72 { 0 } 73 }; 74 75 MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table); 76 77 static int __maybe_unused 78 ahd_linux_pci_dev_suspend(struct device *dev) 79 { 80 struct ahd_softc *ahd = dev_get_drvdata(dev); 81 int rc; 82 83 if ((rc = ahd_suspend(ahd))) 84 return rc; 85 86 ahd_pci_suspend(ahd); 87 88 return rc; 89 } 90 91 static int __maybe_unused 92 ahd_linux_pci_dev_resume(struct device *dev) 93 { 94 struct ahd_softc *ahd = dev_get_drvdata(dev); 95 96 ahd_pci_resume(ahd); 97 98 ahd_resume(ahd); 99 100 return 0; 101 } 102 103 static void 104 ahd_linux_pci_dev_remove(struct pci_dev *pdev) 105 { 106 struct ahd_softc *ahd = pci_get_drvdata(pdev); 107 u_long s; 108 109 if (ahd->platform_data && ahd->platform_data->host) 110 scsi_remove_host(ahd->platform_data->host); 111 112 ahd_lock(ahd, &s); 113 ahd_intr_enable(ahd, FALSE); 114 ahd_unlock(ahd, &s); 115 ahd_free(ahd); 116 } 117 118 static void 119 ahd_linux_pci_inherit_flags(struct ahd_softc *ahd) 120 { 121 struct pci_dev *pdev = ahd->dev_softc, *master_pdev; 122 unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); 123 124 master_pdev = pci_get_slot(pdev->bus, master_devfn); 125 if (master_pdev) { 126 struct ahd_softc *master = pci_get_drvdata(master_pdev); 127 if (master) { 128 ahd->flags &= ~AHD_BIOS_ENABLED; 129 ahd->flags |= master->flags & AHD_BIOS_ENABLED; 130 } else 131 printk(KERN_ERR "aic79xx: no multichannel peer found!\n"); 132 pci_dev_put(master_pdev); 133 } 134 } 135 136 static int 137 ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 138 { 139 char buf[80]; 140 struct ahd_softc *ahd; 141 ahd_dev_softc_t pci; 142 const struct ahd_pci_identity *entry; 143 char *name; 144 int error; 145 struct device *dev = &pdev->dev; 146 147 pci = pdev; 148 entry = ahd_find_pci_device(pci); 149 if (entry == NULL) 150 return (-ENODEV); 151 152 /* 153 * Allocate a softc for this card and 154 * set it up for attachment by our 155 * common detect routine. 156 */ 157 sprintf(buf, "ahd_pci:%d:%d:%d", 158 ahd_get_pci_bus(pci), 159 ahd_get_pci_slot(pci), 160 ahd_get_pci_function(pci)); 161 name = kstrdup(buf, GFP_ATOMIC); 162 if (name == NULL) 163 return (-ENOMEM); 164 ahd = ahd_alloc(NULL, name); 165 if (ahd == NULL) 166 return (-ENOMEM); 167 if (pci_enable_device(pdev)) { 168 ahd_free(ahd); 169 return (-ENODEV); 170 } 171 pci_set_master(pdev); 172 173 if (sizeof(dma_addr_t) > 4) { 174 const u64 required_mask = dma_get_required_mask(dev); 175 176 if (required_mask > DMA_BIT_MASK(39) && 177 dma_set_mask(dev, DMA_BIT_MASK(64)) == 0) 178 ahd->flags |= AHD_64BIT_ADDRESSING; 179 else if (required_mask > DMA_BIT_MASK(32) && 180 dma_set_mask(dev, DMA_BIT_MASK(39)) == 0) 181 ahd->flags |= AHD_39BIT_ADDRESSING; 182 else 183 dma_set_mask(dev, DMA_BIT_MASK(32)); 184 } else { 185 dma_set_mask(dev, DMA_BIT_MASK(32)); 186 } 187 ahd->dev_softc = pci; 188 error = ahd_pci_config(ahd, entry); 189 if (error != 0) { 190 ahd_free(ahd); 191 return (-error); 192 } 193 194 /* 195 * Second Function PCI devices need to inherit some 196 * * settings from function 0. 197 */ 198 if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0) 199 ahd_linux_pci_inherit_flags(ahd); 200 201 pci_set_drvdata(pdev, ahd); 202 203 ahd_linux_register_host(ahd, &aic79xx_driver_template); 204 return (0); 205 } 206 207 static SIMPLE_DEV_PM_OPS(ahd_linux_pci_dev_pm_ops, 208 ahd_linux_pci_dev_suspend, 209 ahd_linux_pci_dev_resume); 210 211 static struct pci_driver aic79xx_pci_driver = { 212 .name = "aic79xx", 213 .probe = ahd_linux_pci_dev_probe, 214 .driver.pm = &ahd_linux_pci_dev_pm_ops, 215 .remove = ahd_linux_pci_dev_remove, 216 .id_table = ahd_linux_pci_id_table 217 }; 218 219 int 220 ahd_linux_pci_init(void) 221 { 222 return pci_register_driver(&aic79xx_pci_driver); 223 } 224 225 void 226 ahd_linux_pci_exit(void) 227 { 228 pci_unregister_driver(&aic79xx_pci_driver); 229 } 230 231 static int 232 ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base, 233 resource_size_t *base2) 234 { 235 *base = pci_resource_start(ahd->dev_softc, 0); 236 /* 237 * This is really the 3rd bar and should be at index 2, 238 * but the Linux PCI code doesn't know how to "count" 64bit 239 * bars. 240 */ 241 *base2 = pci_resource_start(ahd->dev_softc, 3); 242 if (*base == 0 || *base2 == 0) 243 return (ENOMEM); 244 if (!request_region(*base, 256, "aic79xx")) 245 return (ENOMEM); 246 if (!request_region(*base2, 256, "aic79xx")) { 247 release_region(*base, 256); 248 return (ENOMEM); 249 } 250 return (0); 251 } 252 253 static int 254 ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd, 255 resource_size_t *bus_addr, 256 uint8_t __iomem **maddr) 257 { 258 resource_size_t start; 259 resource_size_t base_page; 260 u_long base_offset; 261 int error = 0; 262 263 if (aic79xx_allow_memio == 0) 264 return (ENOMEM); 265 266 if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0) 267 return (ENOMEM); 268 269 start = pci_resource_start(ahd->dev_softc, 1); 270 base_page = start & PAGE_MASK; 271 base_offset = start - base_page; 272 if (start != 0) { 273 *bus_addr = start; 274 if (!request_mem_region(start, 0x1000, "aic79xx")) 275 error = ENOMEM; 276 if (!error) { 277 *maddr = ioremap(base_page, base_offset + 512); 278 if (*maddr == NULL) { 279 error = ENOMEM; 280 release_mem_region(start, 0x1000); 281 } else 282 *maddr += base_offset; 283 } 284 } else 285 error = ENOMEM; 286 return (error); 287 } 288 289 int 290 ahd_pci_map_registers(struct ahd_softc *ahd) 291 { 292 uint32_t command; 293 resource_size_t base; 294 uint8_t __iomem *maddr; 295 int error; 296 297 /* 298 * If its allowed, we prefer memory mapped access. 299 */ 300 command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4); 301 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN); 302 base = 0; 303 maddr = NULL; 304 error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr); 305 if (error == 0) { 306 ahd->platform_data->mem_busaddr = base; 307 ahd->tags[0] = BUS_SPACE_MEMIO; 308 ahd->bshs[0].maddr = maddr; 309 ahd->tags[1] = BUS_SPACE_MEMIO; 310 ahd->bshs[1].maddr = maddr + 0x100; 311 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, 312 command | PCIM_CMD_MEMEN, 4); 313 314 if (ahd_pci_test_register_access(ahd) != 0) { 315 316 printk("aic79xx: PCI Device %d:%d:%d " 317 "failed memory mapped test. Using PIO.\n", 318 ahd_get_pci_bus(ahd->dev_softc), 319 ahd_get_pci_slot(ahd->dev_softc), 320 ahd_get_pci_function(ahd->dev_softc)); 321 iounmap(maddr); 322 release_mem_region(ahd->platform_data->mem_busaddr, 323 0x1000); 324 ahd->bshs[0].maddr = NULL; 325 maddr = NULL; 326 } else 327 command |= PCIM_CMD_MEMEN; 328 } else if (bootverbose) { 329 printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx " 330 "unavailable. Cannot memory map device.\n", 331 ahd_get_pci_bus(ahd->dev_softc), 332 ahd_get_pci_slot(ahd->dev_softc), 333 ahd_get_pci_function(ahd->dev_softc), 334 (unsigned long long)base); 335 } 336 337 if (maddr == NULL) { 338 resource_size_t base2; 339 340 error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2); 341 if (error == 0) { 342 ahd->tags[0] = BUS_SPACE_PIO; 343 ahd->tags[1] = BUS_SPACE_PIO; 344 ahd->bshs[0].ioport = (u_long)base; 345 ahd->bshs[1].ioport = (u_long)base2; 346 command |= PCIM_CMD_PORTEN; 347 } else { 348 printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and " 349 "0x%llx unavailable. Cannot map device.\n", 350 ahd_get_pci_bus(ahd->dev_softc), 351 ahd_get_pci_slot(ahd->dev_softc), 352 ahd_get_pci_function(ahd->dev_softc), 353 (unsigned long long)base, 354 (unsigned long long)base2); 355 } 356 } 357 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4); 358 return (error); 359 } 360 361 int 362 ahd_pci_map_int(struct ahd_softc *ahd) 363 { 364 int error; 365 366 error = request_irq(ahd->dev_softc->irq, ahd_linux_isr, 367 IRQF_SHARED, "aic79xx", ahd); 368 if (!error) 369 ahd->platform_data->irq = ahd->dev_softc->irq; 370 371 return (-error); 372 } 373 374 void 375 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state) 376 { 377 pci_set_power_state(ahd->dev_softc, new_state); 378 } 379