1 /*- 2 * Copyright (c) 2015-2016 Mellanox Technologies, Ltd. 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 unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 #include <sys/kernel.h> 34 #include <sys/sysctl.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/bus.h> 38 #include <sys/fcntl.h> 39 #include <sys/file.h> 40 #include <sys/filio.h> 41 #include <sys/rwlock.h> 42 43 #include <vm/vm.h> 44 #include <vm/pmap.h> 45 46 #include <machine/stdarg.h> 47 48 #include <linux/kobject.h> 49 #include <linux/device.h> 50 #include <linux/slab.h> 51 #include <linux/module.h> 52 #include <linux/cdev.h> 53 #include <linux/file.h> 54 #include <linux/sysfs.h> 55 #include <linux/mm.h> 56 #include <linux/io.h> 57 #include <linux/vmalloc.h> 58 #include <linux/pci.h> 59 #include <linux/compat.h> 60 61 static device_probe_t linux_pci_probe; 62 static device_attach_t linux_pci_attach; 63 static device_detach_t linux_pci_detach; 64 static device_suspend_t linux_pci_suspend; 65 static device_resume_t linux_pci_resume; 66 static device_shutdown_t linux_pci_shutdown; 67 68 static device_method_t pci_methods[] = { 69 DEVMETHOD(device_probe, linux_pci_probe), 70 DEVMETHOD(device_attach, linux_pci_attach), 71 DEVMETHOD(device_detach, linux_pci_detach), 72 DEVMETHOD(device_suspend, linux_pci_suspend), 73 DEVMETHOD(device_resume, linux_pci_resume), 74 DEVMETHOD(device_shutdown, linux_pci_shutdown), 75 DEVMETHOD_END 76 }; 77 78 static struct pci_driver * 79 linux_pci_find(device_t dev, const struct pci_device_id **idp) 80 { 81 const struct pci_device_id *id; 82 struct pci_driver *pdrv; 83 uint16_t vendor; 84 uint16_t device; 85 86 vendor = pci_get_vendor(dev); 87 device = pci_get_device(dev); 88 89 spin_lock(&pci_lock); 90 list_for_each_entry(pdrv, &pci_drivers, links) { 91 for (id = pdrv->id_table; id->vendor != 0; id++) { 92 if (vendor == id->vendor && device == id->device) { 93 *idp = id; 94 spin_unlock(&pci_lock); 95 return (pdrv); 96 } 97 } 98 } 99 spin_unlock(&pci_lock); 100 return (NULL); 101 } 102 103 static int 104 linux_pci_probe(device_t dev) 105 { 106 const struct pci_device_id *id; 107 struct pci_driver *pdrv; 108 109 if ((pdrv = linux_pci_find(dev, &id)) == NULL) 110 return (ENXIO); 111 if (device_get_driver(dev) != &pdrv->driver) 112 return (ENXIO); 113 device_set_desc(dev, pdrv->name); 114 return (0); 115 } 116 117 static int 118 linux_pci_attach(device_t dev) 119 { 120 struct resource_list_entry *rle; 121 struct pci_dev *pdev; 122 struct pci_driver *pdrv; 123 const struct pci_device_id *id; 124 int error; 125 126 linux_set_current(curthread); 127 pdrv = linux_pci_find(dev, &id); 128 pdev = device_get_softc(dev); 129 pdev->dev.parent = &linux_root_device; 130 pdev->dev.bsddev = dev; 131 INIT_LIST_HEAD(&pdev->dev.irqents); 132 pdev->device = id->device; 133 pdev->vendor = id->vendor; 134 pdev->dev.dma_mask = &pdev->dma_mask; 135 pdev->pdrv = pdrv; 136 kobject_init(&pdev->dev.kobj, &linux_dev_ktype); 137 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev)); 138 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj, 139 kobject_name(&pdev->dev.kobj)); 140 rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 0); 141 if (rle != NULL) 142 pdev->dev.irq = rle->start; 143 else 144 pdev->dev.irq = LINUX_IRQ_INVALID; 145 pdev->irq = pdev->dev.irq; 146 DROP_GIANT(); 147 spin_lock(&pci_lock); 148 list_add(&pdev->links, &pci_devices); 149 spin_unlock(&pci_lock); 150 error = pdrv->probe(pdev, id); 151 PICKUP_GIANT(); 152 if (error) { 153 spin_lock(&pci_lock); 154 list_del(&pdev->links); 155 spin_unlock(&pci_lock); 156 put_device(&pdev->dev); 157 error = -error; 158 } 159 return (error); 160 } 161 162 static int 163 linux_pci_detach(device_t dev) 164 { 165 struct pci_dev *pdev; 166 167 linux_set_current(curthread); 168 pdev = device_get_softc(dev); 169 DROP_GIANT(); 170 pdev->pdrv->remove(pdev); 171 PICKUP_GIANT(); 172 spin_lock(&pci_lock); 173 list_del(&pdev->links); 174 spin_unlock(&pci_lock); 175 put_device(&pdev->dev); 176 177 return (0); 178 } 179 180 static int 181 linux_pci_suspend(device_t dev) 182 { 183 struct pm_message pm = { }; 184 struct pci_dev *pdev; 185 int err; 186 187 linux_set_current(curthread); 188 pdev = device_get_softc(dev); 189 if (pdev->pdrv->suspend != NULL) 190 err = -pdev->pdrv->suspend(pdev, pm); 191 else 192 err = 0; 193 return (err); 194 } 195 196 static int 197 linux_pci_resume(device_t dev) 198 { 199 struct pci_dev *pdev; 200 int err; 201 202 linux_set_current(curthread); 203 pdev = device_get_softc(dev); 204 if (pdev->pdrv->resume != NULL) 205 err = -pdev->pdrv->resume(pdev); 206 else 207 err = 0; 208 return (err); 209 } 210 211 static int 212 linux_pci_shutdown(device_t dev) 213 { 214 struct pci_dev *pdev; 215 216 linux_set_current(curthread); 217 pdev = device_get_softc(dev); 218 if (pdev->pdrv->shutdown != NULL) { 219 DROP_GIANT(); 220 pdev->pdrv->shutdown(pdev); 221 PICKUP_GIANT(); 222 } 223 return (0); 224 } 225 226 int 227 pci_register_driver(struct pci_driver *pdrv) 228 { 229 devclass_t bus; 230 int error = 0; 231 232 bus = devclass_find("pci"); 233 234 linux_set_current(curthread); 235 spin_lock(&pci_lock); 236 list_add(&pdrv->links, &pci_drivers); 237 spin_unlock(&pci_lock); 238 pdrv->driver.name = pdrv->name; 239 pdrv->driver.methods = pci_methods; 240 pdrv->driver.size = sizeof(struct pci_dev); 241 mtx_lock(&Giant); 242 if (bus != NULL) { 243 error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT, 244 &pdrv->bsdclass); 245 } 246 mtx_unlock(&Giant); 247 return (-error); 248 } 249 250 void 251 pci_unregister_driver(struct pci_driver *pdrv) 252 { 253 devclass_t bus; 254 255 bus = devclass_find("pci"); 256 257 list_del(&pdrv->links); 258 mtx_lock(&Giant); 259 if (bus != NULL) 260 devclass_delete_driver(bus, &pdrv->driver); 261 mtx_unlock(&Giant); 262 } 263 264