1 /*- 2 * Copyright (c) 2015 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 #include <machine/pmap.h> 48 49 #include <linux/kobject.h> 50 #include <linux/device.h> 51 #include <linux/slab.h> 52 #include <linux/module.h> 53 #include <linux/cdev.h> 54 #include <linux/file.h> 55 #include <linux/sysfs.h> 56 #include <linux/mm.h> 57 #include <linux/io.h> 58 #include <linux/vmalloc.h> 59 #include <linux/pci.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 pdrv = linux_pci_find(dev, &id); 127 pdev = device_get_softc(dev); 128 pdev->dev.parent = &linux_root_device; 129 pdev->dev.bsddev = dev; 130 INIT_LIST_HEAD(&pdev->dev.irqents); 131 pdev->device = id->device; 132 pdev->vendor = id->vendor; 133 pdev->dev.dma_mask = &pdev->dma_mask; 134 pdev->pdrv = pdrv; 135 kobject_init(&pdev->dev.kobj, &linux_dev_ktype); 136 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev)); 137 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj, 138 kobject_name(&pdev->dev.kobj)); 139 rle = _pci_get_rle(pdev, SYS_RES_IRQ, 0); 140 if (rle) 141 pdev->dev.irq = rle->start; 142 else 143 pdev->dev.irq = 0; 144 pdev->irq = pdev->dev.irq; 145 mtx_unlock(&Giant); 146 spin_lock(&pci_lock); 147 list_add(&pdev->links, &pci_devices); 148 spin_unlock(&pci_lock); 149 error = pdrv->probe(pdev, id); 150 mtx_lock(&Giant); 151 if (error) { 152 spin_lock(&pci_lock); 153 list_del(&pdev->links); 154 spin_unlock(&pci_lock); 155 put_device(&pdev->dev); 156 return (-error); 157 } 158 return (0); 159 } 160 161 static int 162 linux_pci_detach(device_t dev) 163 { 164 struct pci_dev *pdev; 165 166 pdev = device_get_softc(dev); 167 mtx_unlock(&Giant); 168 pdev->pdrv->remove(pdev); 169 mtx_lock(&Giant); 170 spin_lock(&pci_lock); 171 list_del(&pdev->links); 172 spin_unlock(&pci_lock); 173 put_device(&pdev->dev); 174 175 return (0); 176 } 177 178 static int 179 linux_pci_suspend(device_t dev) 180 { 181 struct pm_message pm = { }; 182 struct pci_dev *pdev; 183 int err; 184 185 pdev = device_get_softc(dev); 186 if (pdev->pdrv->suspend != NULL) 187 err = -pdev->pdrv->suspend(pdev, pm); 188 else 189 err = 0; 190 return (err); 191 } 192 193 static int 194 linux_pci_resume(device_t dev) 195 { 196 struct pci_dev *pdev; 197 int err; 198 199 pdev = device_get_softc(dev); 200 if (pdev->pdrv->resume != NULL) 201 err = -pdev->pdrv->resume(pdev); 202 else 203 err = 0; 204 return (err); 205 } 206 207 static int 208 linux_pci_shutdown(device_t dev) 209 { 210 struct pci_dev *pdev; 211 212 pdev = device_get_softc(dev); 213 if (pdev->pdrv->shutdown != NULL) 214 pdev->pdrv->shutdown(pdev); 215 return (0); 216 } 217 218 int 219 pci_register_driver(struct pci_driver *pdrv) 220 { 221 devclass_t bus; 222 int error = 0; 223 224 bus = devclass_find("pci"); 225 226 spin_lock(&pci_lock); 227 list_add(&pdrv->links, &pci_drivers); 228 spin_unlock(&pci_lock); 229 pdrv->driver.name = pdrv->name; 230 pdrv->driver.methods = pci_methods; 231 pdrv->driver.size = sizeof(struct pci_dev); 232 mtx_lock(&Giant); 233 if (bus != NULL) { 234 error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT, 235 &pdrv->bsdclass); 236 } 237 mtx_unlock(&Giant); 238 return (-error); 239 } 240 241 void 242 pci_unregister_driver(struct pci_driver *pdrv) 243 { 244 devclass_t bus; 245 246 bus = devclass_find("pci"); 247 248 list_del(&pdrv->links); 249 mtx_lock(&Giant); 250 if (bus != NULL) 251 devclass_delete_driver(bus, &pdrv->driver); 252 mtx_unlock(&Giant); 253 } 254 255