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 60 static device_probe_t linux_pci_probe; 61 static device_attach_t linux_pci_attach; 62 static device_detach_t linux_pci_detach; 63 static device_suspend_t linux_pci_suspend; 64 static device_resume_t linux_pci_resume; 65 static device_shutdown_t linux_pci_shutdown; 66 67 static device_method_t pci_methods[] = { 68 DEVMETHOD(device_probe, linux_pci_probe), 69 DEVMETHOD(device_attach, linux_pci_attach), 70 DEVMETHOD(device_detach, linux_pci_detach), 71 DEVMETHOD(device_suspend, linux_pci_suspend), 72 DEVMETHOD(device_resume, linux_pci_resume), 73 DEVMETHOD(device_shutdown, linux_pci_shutdown), 74 DEVMETHOD_END 75 }; 76 77 static struct pci_driver * 78 linux_pci_find(device_t dev, const struct pci_device_id **idp) 79 { 80 const struct pci_device_id *id; 81 struct pci_driver *pdrv; 82 uint16_t vendor; 83 uint16_t device; 84 85 vendor = pci_get_vendor(dev); 86 device = pci_get_device(dev); 87 88 spin_lock(&pci_lock); 89 list_for_each_entry(pdrv, &pci_drivers, links) { 90 for (id = pdrv->id_table; id->vendor != 0; id++) { 91 if (vendor == id->vendor && device == id->device) { 92 *idp = id; 93 spin_unlock(&pci_lock); 94 return (pdrv); 95 } 96 } 97 } 98 spin_unlock(&pci_lock); 99 return (NULL); 100 } 101 102 static int 103 linux_pci_probe(device_t dev) 104 { 105 const struct pci_device_id *id; 106 struct pci_driver *pdrv; 107 108 if ((pdrv = linux_pci_find(dev, &id)) == NULL) 109 return (ENXIO); 110 if (device_get_driver(dev) != &pdrv->driver) 111 return (ENXIO); 112 device_set_desc(dev, pdrv->name); 113 return (0); 114 } 115 116 static int 117 linux_pci_attach(device_t dev) 118 { 119 struct resource_list_entry *rle; 120 struct pci_dev *pdev; 121 struct pci_driver *pdrv; 122 const struct pci_device_id *id; 123 int error; 124 125 pdrv = linux_pci_find(dev, &id); 126 pdev = device_get_softc(dev); 127 pdev->dev.parent = &linux_root_device; 128 pdev->dev.bsddev = dev; 129 INIT_LIST_HEAD(&pdev->dev.irqents); 130 pdev->device = id->device; 131 pdev->vendor = id->vendor; 132 pdev->dev.dma_mask = &pdev->dma_mask; 133 pdev->pdrv = pdrv; 134 kobject_init(&pdev->dev.kobj, &linux_dev_ktype); 135 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev)); 136 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj, 137 kobject_name(&pdev->dev.kobj)); 138 rle = _pci_get_rle(pdev, SYS_RES_IRQ, 0); 139 if (rle) 140 pdev->dev.irq = rle->start; 141 else 142 pdev->dev.irq = 0; 143 pdev->irq = pdev->dev.irq; 144 mtx_unlock(&Giant); 145 spin_lock(&pci_lock); 146 list_add(&pdev->links, &pci_devices); 147 spin_unlock(&pci_lock); 148 error = pdrv->probe(pdev, id); 149 mtx_lock(&Giant); 150 if (error) { 151 spin_lock(&pci_lock); 152 list_del(&pdev->links); 153 spin_unlock(&pci_lock); 154 put_device(&pdev->dev); 155 return (-error); 156 } 157 return (0); 158 } 159 160 static int 161 linux_pci_detach(device_t dev) 162 { 163 struct pci_dev *pdev; 164 165 pdev = device_get_softc(dev); 166 mtx_unlock(&Giant); 167 pdev->pdrv->remove(pdev); 168 mtx_lock(&Giant); 169 spin_lock(&pci_lock); 170 list_del(&pdev->links); 171 spin_unlock(&pci_lock); 172 put_device(&pdev->dev); 173 174 return (0); 175 } 176 177 static int 178 linux_pci_suspend(device_t dev) 179 { 180 struct pm_message pm = { }; 181 struct pci_dev *pdev; 182 int err; 183 184 pdev = device_get_softc(dev); 185 if (pdev->pdrv->suspend != NULL) 186 err = -pdev->pdrv->suspend(pdev, pm); 187 else 188 err = 0; 189 return (err); 190 } 191 192 static int 193 linux_pci_resume(device_t dev) 194 { 195 struct pci_dev *pdev; 196 int err; 197 198 pdev = device_get_softc(dev); 199 if (pdev->pdrv->resume != NULL) 200 err = -pdev->pdrv->resume(pdev); 201 else 202 err = 0; 203 return (err); 204 } 205 206 static int 207 linux_pci_shutdown(device_t dev) 208 { 209 struct pci_dev *pdev; 210 211 pdev = device_get_softc(dev); 212 if (pdev->pdrv->shutdown != NULL) { 213 DROP_GIANT(); 214 pdev->pdrv->shutdown(pdev); 215 PICKUP_GIANT(); 216 } 217 return (0); 218 } 219 220 int 221 pci_register_driver(struct pci_driver *pdrv) 222 { 223 devclass_t bus; 224 int error = 0; 225 226 bus = devclass_find("pci"); 227 228 spin_lock(&pci_lock); 229 list_add(&pdrv->links, &pci_drivers); 230 spin_unlock(&pci_lock); 231 pdrv->driver.name = pdrv->name; 232 pdrv->driver.methods = pci_methods; 233 pdrv->driver.size = sizeof(struct pci_dev); 234 mtx_lock(&Giant); 235 if (bus != NULL) { 236 error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT, 237 &pdrv->bsdclass); 238 } 239 mtx_unlock(&Giant); 240 return (-error); 241 } 242 243 void 244 pci_unregister_driver(struct pci_driver *pdrv) 245 { 246 devclass_t bus; 247 248 bus = devclass_find("pci"); 249 250 list_del(&pdrv->links); 251 mtx_lock(&Giant); 252 if (bus != NULL) 253 devclass_delete_driver(bus, &pdrv->driver); 254 mtx_unlock(&Giant); 255 } 256 257