1 /*
2 * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
3 */
4
5 /*
6 * ati_pcigart.h -- ATI PCI GART support -*- linux-c -*-
7 * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
8 */
9 /*
10 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
11 * All Rights Reserved.
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining a
14 * copy of this software and associated documentation files (the "Software"),
15 * to deal in the Software without restriction, including without limitation
16 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
17 * and/or sell copies of the Software, and to permit persons to whom the
18 * Software is furnished to do so, subject to the following conditions:
19 *
20 * The above copyright notice and this permission notice (including the next
21 * paragraph) shall be included in all copies or substantial portions of the
22 * Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
28 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
29 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
30 * DEALINGS IN THE SOFTWARE.
31 *
32 * Authors:
33 * Gareth Hughes <gareth@valinux.com>
34 *
35 */
36
37 #include "drmP.h"
38
39 #define ATI_PCIGART_PAGE_SIZE 4096 /* PCI GART page size */
40 #define ATI_MAX_PCIGART_PAGES 8192 /* 32 MB aperture, 4K pages */
41 #define ATI_PCIGART_TABLE_SIZE 32768
42
43 int
44 /* LINTED */
drm_ati_pcigart_cleanup(drm_device_t * dev,drm_ati_pcigart_info * gart_info)45 drm_ati_pcigart_cleanup(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
46 {
47 drm_dma_handle_t *dmah;
48
49 if (dev->sg == NULL) {
50 DRM_ERROR("no scatter/gather memory!\n");
51 return (0);
52 }
53 dmah = dev->sg->dmah_gart;
54 dev->sg->dmah_gart = NULL;
55 if (dmah)
56 drm_pci_free(dmah);
57 return (1);
58 }
59
60 int
drm_ati_pcigart_init(drm_device_t * dev,drm_ati_pcigart_info * gart_info)61 drm_ati_pcigart_init(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
62 {
63 unsigned long pages;
64 drm_sg_mem_t *entry;
65 drm_dma_handle_t *dmah;
66 u32 *pci_gart = NULL, page_base;
67 int i, j, k;
68 int pagenum;
69 size_t bulksize;
70
71 entry = dev->sg;
72 if (entry == NULL) {
73 DRM_ERROR("no scatter/gather memory!\n");
74 return (0);
75 }
76
77 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
78 /* GART table in system memory */
79 entry->dmah_gart = drm_pci_alloc(dev, ATI_PCIGART_TABLE_SIZE, 0,
80 0xfffffffful, 1);
81 if (entry->dmah_gart == NULL) {
82 DRM_ERROR("cannot allocate PCI GART table!\n");
83 return (0);
84 }
85 gart_info->addr = (void *)entry->dmah_gart->vaddr;
86 gart_info->bus_addr = entry->dmah_gart->paddr;
87 pci_gart = (u32 *)entry->dmah_gart->vaddr;
88 } else {
89 /* GART table in framebuffer memory */
90 pci_gart = gart_info->addr;
91 }
92
93 pages = DRM_MIN(entry->pages, ATI_MAX_PCIGART_PAGES);
94 bzero(pci_gart, ATI_PCIGART_TABLE_SIZE);
95 /*CONSTCOND*/
96 ASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE);
97
98 dmah = entry->dmah_sg;
99 pagenum = 0;
100 for (i = 0; i < dmah->cookie_num; i++) {
101 bulksize = dmah->cookie.dmac_size;
102 for (k = 0; k < bulksize / PAGE_SIZE; k++) {
103 entry->busaddr[pagenum] =
104 dmah->cookie.dmac_address + k * PAGE_SIZE;
105 page_base = (u32) entry->busaddr[pagenum];
106 if (pagenum ++ == pages)
107 goto out;
108 for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
109 j++) {
110 if (gart_info->is_pcie)
111 *pci_gart = (page_base >> 8) | 0xc;
112 else
113 *pci_gart = page_base;
114 pci_gart++;
115 page_base += ATI_PCIGART_PAGE_SIZE;
116 }
117 }
118 ddi_dma_nextcookie(dmah->dma_hdl, &dmah->cookie);
119 }
120
121 out:
122 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
123 (void) ddi_dma_sync(entry->dmah_gart->dma_hdl, 0,
124 entry->dmah_gart->real_sz, DDI_DMA_SYNC_FORDEV);
125 }
126
127 return (1);
128 }
129