drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c

   1 /*
   2  * Copyright 2015 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs <bskeggs@redhat.com>
  23  */
  24 #include <core/pci.h>
  25 #include "priv.h"
  26
  27 static struct nvkm_device_pci *
  28 nvkm_device_pci(struct nvkm_device *device)
  29 {
  30         return container_of(device, struct nvkm_device_pci, device);
  31 }
  32
  33 static resource_size_t
  34 nvkm_device_pci_resource_addr(struct nvkm_device *device, unsigned bar)
  35 {
  36         struct nvkm_device_pci *pdev = nvkm_device_pci(device);
  37         return pci_resource_start(pdev->pdev, bar);
  38 }
  39
  40 static resource_size_t
  41 nvkm_device_pci_resource_size(struct nvkm_device *device, unsigned bar)
  42 {
  43         struct nvkm_device_pci *pdev = nvkm_device_pci(device);
  44         return pci_resource_len(pdev->pdev, bar);
  45 }
  46
  47 static void
  48 nvkm_device_pci_fini(struct nvkm_device *device, bool suspend)
  49 {
  50         struct nvkm_device_pci *pdev = nvkm_device_pci(device);
  51         if (suspend) {
  52                 pci_disable_device(pdev->pdev);
  53                 pdev->suspend = true;
  54         }
  55 }
  56
  57 static int
  58 nvkm_device_pci_preinit(struct nvkm_device *device)
  59 {
  60         struct nvkm_device_pci *pdev = nvkm_device_pci(device);
  61         if (pdev->suspend) {
  62                 int ret = pci_enable_device(pdev->pdev);
  63                 if (ret)
  64                         return ret;
  65                 pci_set_master(pdev->pdev);
  66                 pdev->suspend = false;
  67         }
  68         return 0;
  69 }
  70
  71 static void *
  72 nvkm_device_pci_dtor(struct nvkm_device *device)
  73 {
  74         struct nvkm_device_pci *pdev = nvkm_device_pci(device);
  75         pci_disable_device(pdev->pdev);
  76         return pdev;
  77 }
  78
  79 static const struct nvkm_device_func
  80 nvkm_device_pci_func = {
  81         .pci = nvkm_device_pci,
  82         .dtor = nvkm_device_pci_dtor,
  83         .preinit = nvkm_device_pci_preinit,
  84         .fini = nvkm_device_pci_fini,
  85         .resource_addr = nvkm_device_pci_resource_addr,
  86         .resource_size = nvkm_device_pci_resource_size,
  87 };
  88
  89 int
  90 nvkm_device_pci_new(struct pci_dev *pci_dev, const char *cfg, const char *dbg,
  91                     bool detect, bool mmio, u64 subdev_mask,
  92                     struct nvkm_device **pdevice)
  93 {
  94         struct nvkm_device_pci *pdev;
  95         int ret;
  96
  97         ret = pci_enable_device(pci_dev);
  98         if (ret)
  99                 return ret;
 100
 101         if (!(pdev = kzalloc(sizeof(*pdev), GFP_KERNEL))) {
 102                 pci_disable_device(pci_dev);
 103                 return -ENOMEM;
 104         }
 105         *pdevice = &pdev->device;
 106         pdev->pdev = pci_dev;
 107
 108         return nvkm_device_ctor(&nvkm_device_pci_func, NULL,
 109                                 pci_dev, NVKM_BUS_PCI,
 110                                 (u64)pci_domain_nr(pci_dev->bus) << 32 |
 111                                      pci_dev->bus->number << 16 |
 112                                      PCI_SLOT(pci_dev->devfn) << 8 |
 113                                      PCI_FUNC(pci_dev->devfn), NULL,
 114                                 cfg, dbg, detect, mmio, subdev_mask,
 115                                 &pdev->device);
 116 }