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| 3031 | serge | 1 | /* drm_pci.h -- PCI DMA memory management wrappers for DRM -*- linux-c -*- */ |
| 2 | /** |
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| 3 | * \file drm_pci.c |
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| 4 | * \brief Functions and ioctls to manage PCI memory |
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| 5 | * |
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| 6 | * \warning These interfaces aren't stable yet. |
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| 7 | * |
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| 8 | * \todo Implement the remaining ioctl's for the PCI pools. |
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| 9 | * \todo The wrappers here are so thin that they would be better off inlined.. |
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| 10 | * |
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| 11 | * \author José Fonseca |
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| 12 | * \author Leif Delgass |
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| 13 | */ |
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| 14 | |||
| 15 | /* |
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| 16 | * Copyright 2003 José Fonseca. |
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| 17 | * Copyright 2003 Leif Delgass. |
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| 18 | * All Rights Reserved. |
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| 19 | * |
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| 20 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 21 | * copy of this software and associated documentation files (the "Software"), |
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| 22 | * to deal in the Software without restriction, including without limitation |
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| 23 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 24 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 25 | * Software is furnished to do so, subject to the following conditions: |
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| 26 | * |
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| 27 | * The above copyright notice and this permission notice (including the next |
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| 28 | * paragraph) shall be included in all copies or substantial portions of the |
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| 29 | * Software. |
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| 30 | * |
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| 31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 32 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 33 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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| 34 | * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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| 35 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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| 36 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 37 | */ |
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| 38 | |||
| 39 | //#include |
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| 40 | //#include |
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| 41 | //#include |
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| 42 | #include |
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| 43 | #include |
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| 44 | |||
| 45 | #include |
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| 46 | |||
| 47 | /**********************************************************************/ |
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| 48 | /** \name PCI memory */ |
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| 49 | /*@{*/ |
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| 50 | |||
| 51 | /** |
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| 52 | * \brief Allocate a PCI consistent memory block, for DMA. |
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| 53 | */ |
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| 54 | drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align) |
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| 55 | { |
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| 56 | drm_dma_handle_t *dmah; |
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| 57 | #if 1 |
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| 58 | unsigned long addr; |
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| 59 | size_t sz; |
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| 60 | #endif |
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| 61 | |||
| 62 | /* pci_alloc_consistent only guarantees alignment to the smallest |
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| 63 | * PAGE_SIZE order which is greater than or equal to the requested size. |
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| 64 | * Return NULL here for now to make sure nobody tries for larger alignment |
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| 65 | */ |
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| 66 | if (align > size) |
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| 67 | return NULL; |
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| 68 | |||
| 69 | dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); |
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| 70 | if (!dmah) |
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| 71 | return NULL; |
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| 72 | |||
| 73 | dmah->size = size; |
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| 74 | dmah->vaddr = (void*)KernelAlloc(size); |
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| 75 | dmah->busaddr = GetPgAddr(dmah->vaddr); |
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| 76 | |||
| 77 | if (dmah->vaddr == NULL) { |
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| 78 | kfree(dmah); |
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| 79 | return NULL; |
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| 80 | } |
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| 81 | |||
| 82 | memset(dmah->vaddr, 0, size); |
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| 83 | |||
| 84 | return dmah; |
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| 85 | } |
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| 86 | |||
| 87 | |||
| 88 | int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *mask) |
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| 89 | { |
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| 90 | struct pci_dev *root; |
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| 91 | int pos; |
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| 92 | u32 lnkcap, lnkcap2; |
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| 93 | |||
| 94 | *mask = 0; |
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| 95 | if (!dev->pdev) |
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| 96 | return -EINVAL; |
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| 97 | |||
| 98 | if (!pci_is_pcie(dev->pdev)) |
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| 99 | return -EINVAL; |
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| 100 | |||
| 101 | return -EINVAL; |
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| 102 | |||
| 103 | #if 0 |
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| 104 | root = dev->pdev->bus->self; |
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| 105 | |||
| 106 | pos = pci_pcie_cap(root); |
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| 107 | if (!pos) |
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| 108 | return -EINVAL; |
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| 109 | |||
| 110 | /* we've been informed via and serverworks don't make the cut */ |
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| 111 | // if (root->vendor == PCI_VENDOR_ID_VIA || |
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| 112 | // root->vendor == PCI_VENDOR_ID_SERVERWORKS) |
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| 113 | // return -EINVAL; |
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| 114 | |||
| 115 | pci_read_config_dword(root, pos + PCI_EXP_LNKCAP, &lnkcap); |
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| 116 | pci_read_config_dword(root, pos + PCI_EXP_LNKCAP2, &lnkcap2); |
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| 117 | |||
| 118 | lnkcap &= PCI_EXP_LNKCAP_SLS; |
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| 119 | lnkcap2 &= 0xfe; |
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| 120 | |||
| 121 | if (lnkcap2) { /* PCIE GEN 3.0 */ |
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| 122 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_2_5GB) |
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| 123 | *mask |= DRM_PCIE_SPEED_25; |
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| 124 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_5_0GB) |
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| 125 | *mask |= DRM_PCIE_SPEED_50; |
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| 126 | if (lnkcap2 & PCI_EXP_LNKCAP2_SLS_8_0GB) |
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| 127 | *mask |= DRM_PCIE_SPEED_80; |
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| 128 | } else { |
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| 129 | if (lnkcap & 1) |
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| 130 | *mask |= DRM_PCIE_SPEED_25; |
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| 131 | if (lnkcap & 2) |
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| 132 | *mask |= DRM_PCIE_SPEED_50; |
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| 133 | } |
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| 134 | |||
| 135 | DRM_INFO("probing gen 2 caps for device %x:%x = %x/%x\n", root->vendor, root->device, lnkcap, lnkcap2); |
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| 136 | return 0; |
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| 137 | #endif |
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| 138 | |||
| 139 | } |
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| 140 | EXPORT_SYMBOL(drm_pcie_get_speed_cap_mask); |