linux_pci.c revision 310250
1179189Sjb/*- 2179189Sjb * Copyright (c) 2015-2016 Mellanox Technologies, Ltd. 3204597Suqs * All rights reserved. 4204597Suqs * 5179189Sjb * Redistribution and use in source and binary forms, with or without 6179189Sjb * modification, are permitted provided that the following conditions 7179189Sjb * are met: 8179189Sjb * 1. Redistributions of source code must retain the above copyright 9179189Sjb * notice unmodified, this list of conditions, and the following 10179189Sjb * disclaimer. 11179189Sjb * 2. Redistributions in binary form must reproduce the above copyright 12179189Sjb * notice, this list of conditions and the following disclaimer in the 13179189Sjb * documentation and/or other materials provided with the distribution. 14179189Sjb * 15179189Sjb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16179189Sjb * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17179189Sjb * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18179189Sjb * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19179189Sjb * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20179189Sjb * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21211554Srpaulo * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22179189Sjb * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23179189Sjb * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24179189Sjb * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25179189Sjb */ 26179189Sjb 27179189Sjb#include <sys/cdefs.h> 28179189Sjb__FBSDID("$FreeBSD: stable/11/sys/compat/linuxkpi/common/src/linux_pci.c 310250 2016-12-19 09:47:34Z hselasky $"); 29179189Sjb 30179189Sjb#include <sys/param.h> 31179189Sjb#include <sys/systm.h> 32179189Sjb#include <sys/malloc.h> 33179189Sjb#include <sys/kernel.h> 34179189Sjb#include <sys/sysctl.h> 35179189Sjb#include <sys/lock.h> 36179189Sjb#include <sys/mutex.h> 37179189Sjb#include <sys/bus.h> 38179189Sjb#include <sys/fcntl.h> 39179189Sjb#include <sys/file.h> 40179189Sjb#include <sys/filio.h> 41179189Sjb#include <sys/rwlock.h> 42179189Sjb 43179189Sjb#include <vm/vm.h> 44179189Sjb#include <vm/pmap.h> 45211554Srpaulo 46211554Srpaulo#include <machine/stdarg.h> 47179189Sjb 48179189Sjb#include <linux/kobject.h> 49179189Sjb#include <linux/device.h> 50179189Sjb#include <linux/slab.h> 51179189Sjb#include <linux/module.h> 52179189Sjb#include <linux/cdev.h> 53204597Suqs#include <linux/file.h> 54179189Sjb#include <linux/sysfs.h> 55211554Srpaulo#include <linux/mm.h> 56211554Srpaulo#include <linux/io.h> 57179189Sjb#include <linux/vmalloc.h> 58179189Sjb#include <linux/pci.h> 59179189Sjb#include <linux/compat.h> 60179189Sjb 61179189Sjbstatic device_probe_t linux_pci_probe; 62179189Sjbstatic device_attach_t linux_pci_attach; 63179189Sjbstatic device_detach_t linux_pci_detach; 64179189Sjbstatic device_suspend_t linux_pci_suspend; 65179189Sjbstatic device_resume_t linux_pci_resume; 66179189Sjbstatic device_shutdown_t linux_pci_shutdown; 67211554Srpaulo 68211554Srpaulostatic device_method_t pci_methods[] = { 69211554Srpaulo DEVMETHOD(device_probe, linux_pci_probe), 70179189Sjb DEVMETHOD(device_attach, linux_pci_attach), 71179189Sjb DEVMETHOD(device_detach, linux_pci_detach), 72211554Srpaulo DEVMETHOD(device_suspend, linux_pci_suspend), 73179189Sjb DEVMETHOD(device_resume, linux_pci_resume), 74179189Sjb DEVMETHOD(device_shutdown, linux_pci_shutdown), 75179189Sjb DEVMETHOD_END 76179189Sjb}; 77179189Sjb 78211554Srpaulostatic struct pci_driver * 79211554Srpaulolinux_pci_find(device_t dev, const struct pci_device_id **idp) 80211554Srpaulo{ 81211554Srpaulo const struct pci_device_id *id; 82179189Sjb struct pci_driver *pdrv; 83179189Sjb uint16_t vendor; 84179189Sjb uint16_t device; 85179189Sjb 86179189Sjb vendor = pci_get_vendor(dev); 87179189Sjb device = pci_get_device(dev); 88179189Sjb 89179189Sjb spin_lock(&pci_lock); 90179189Sjb list_for_each_entry(pdrv, &pci_drivers, links) { 91179189Sjb for (id = pdrv->id_table; id->vendor != 0; id++) { 92179189Sjb if (vendor == id->vendor && device == id->device) { 93179189Sjb *idp = id; 94179189Sjb spin_unlock(&pci_lock); 95179189Sjb return (pdrv); 96179189Sjb } 97179189Sjb } 98179189Sjb } 99179189Sjb spin_unlock(&pci_lock); 100179189Sjb return (NULL); 101179189Sjb} 102179189Sjb 103179189Sjbstatic int 104linux_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 117static int 118linux_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 struct task_struct t; 125 struct thread *td; 126 int error; 127 128 td = curthread; 129 linux_set_current(td, &t); 130 pdrv = linux_pci_find(dev, &id); 131 pdev = device_get_softc(dev); 132 pdev->dev.parent = &linux_root_device; 133 pdev->dev.bsddev = dev; 134 INIT_LIST_HEAD(&pdev->dev.irqents); 135 pdev->device = id->device; 136 pdev->vendor = id->vendor; 137 pdev->dev.dma_mask = &pdev->dma_mask; 138 pdev->pdrv = pdrv; 139 kobject_init(&pdev->dev.kobj, &linux_dev_ktype); 140 kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev)); 141 kobject_add(&pdev->dev.kobj, &linux_root_device.kobj, 142 kobject_name(&pdev->dev.kobj)); 143 rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 0); 144 if (rle != NULL) 145 pdev->dev.irq = rle->start; 146 else 147 pdev->dev.irq = LINUX_IRQ_INVALID; 148 pdev->irq = pdev->dev.irq; 149 DROP_GIANT(); 150 spin_lock(&pci_lock); 151 list_add(&pdev->links, &pci_devices); 152 spin_unlock(&pci_lock); 153 error = pdrv->probe(pdev, id); 154 PICKUP_GIANT(); 155 if (error) { 156 spin_lock(&pci_lock); 157 list_del(&pdev->links); 158 spin_unlock(&pci_lock); 159 put_device(&pdev->dev); 160 error = -error; 161 } 162 linux_clear_current(td); 163 return (error); 164} 165 166static int 167linux_pci_detach(device_t dev) 168{ 169 struct pci_dev *pdev; 170 struct task_struct t; 171 struct thread *td; 172 173 td = curthread; 174 linux_set_current(td, &t); 175 pdev = device_get_softc(dev); 176 DROP_GIANT(); 177 pdev->pdrv->remove(pdev); 178 PICKUP_GIANT(); 179 spin_lock(&pci_lock); 180 list_del(&pdev->links); 181 spin_unlock(&pci_lock); 182 put_device(&pdev->dev); 183 linux_clear_current(td); 184 185 return (0); 186} 187 188static int 189linux_pci_suspend(device_t dev) 190{ 191 struct pm_message pm = { }; 192 struct pci_dev *pdev; 193 struct task_struct t; 194 struct thread *td; 195 int err; 196 197 td = curthread; 198 linux_set_current(td, &t); 199 pdev = device_get_softc(dev); 200 if (pdev->pdrv->suspend != NULL) 201 err = -pdev->pdrv->suspend(pdev, pm); 202 else 203 err = 0; 204 linux_clear_current(td); 205 return (err); 206} 207 208static int 209linux_pci_resume(device_t dev) 210{ 211 struct pci_dev *pdev; 212 struct task_struct t; 213 struct thread *td; 214 int err; 215 216 td = curthread; 217 linux_set_current(td, &t); 218 pdev = device_get_softc(dev); 219 if (pdev->pdrv->resume != NULL) 220 err = -pdev->pdrv->resume(pdev); 221 else 222 err = 0; 223 linux_clear_current(td); 224 return (err); 225} 226 227static int 228linux_pci_shutdown(device_t dev) 229{ 230 struct pci_dev *pdev; 231 struct task_struct t; 232 struct thread *td; 233 234 td = curthread; 235 linux_set_current(td, &t); 236 pdev = device_get_softc(dev); 237 if (pdev->pdrv->shutdown != NULL) { 238 DROP_GIANT(); 239 pdev->pdrv->shutdown(pdev); 240 PICKUP_GIANT(); 241 } 242 linux_clear_current(td); 243 return (0); 244} 245 246int 247pci_register_driver(struct pci_driver *pdrv) 248{ 249 devclass_t bus; 250 int error = 0; 251 252 bus = devclass_find("pci"); 253 254 spin_lock(&pci_lock); 255 list_add(&pdrv->links, &pci_drivers); 256 spin_unlock(&pci_lock); 257 pdrv->driver.name = pdrv->name; 258 pdrv->driver.methods = pci_methods; 259 pdrv->driver.size = sizeof(struct pci_dev); 260 mtx_lock(&Giant); 261 if (bus != NULL) { 262 error = devclass_add_driver(bus, &pdrv->driver, BUS_PASS_DEFAULT, 263 &pdrv->bsdclass); 264 } 265 mtx_unlock(&Giant); 266 return (-error); 267} 268 269void 270pci_unregister_driver(struct pci_driver *pdrv) 271{ 272 devclass_t bus; 273 274 bus = devclass_find("pci"); 275 276 list_del(&pdrv->links); 277 mtx_lock(&Giant); 278 if (bus != NULL) 279 devclass_delete_driver(bus, &pdrv->driver); 280 mtx_unlock(&Giant); 281} 282 283