1 /*
2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
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 drm_ati_pcigart_init(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
45 {
46 unsigned long pages;
47 drm_sg_mem_t *entry;
48 drm_dma_handle_t *dmah;
49 u32 *pci_gart = NULL, page_base;
50 int i, j, k;
51 int pagenum;
52 size_t bulksize;
53
54 entry = dev->sg;
55 if (entry == NULL) {
56 DRM_ERROR("no scatter/gather memory!\n");
57 return (0);
58 }
59
60 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
61 /* GART table in system memory */
62 entry->dmah_gart = drm_pci_alloc(dev, ATI_PCIGART_TABLE_SIZE, 0,
63 0xfffffffful, 1);
64 if (entry->dmah_gart == NULL) {
65 DRM_ERROR("cannot allocate PCI GART table!\n");
66 return (0);
67 }
68 gart_info->addr = (void *)entry->dmah_gart->vaddr;
69 gart_info->bus_addr = entry->dmah_gart->paddr;
70 pci_gart = (u32 *)entry->dmah_gart->vaddr;
71 } else {
72 /* GART table in framebuffer memory */
73 pci_gart = gart_info->addr;
74 }
75
76 pages = DRM_MIN(entry->pages, ATI_MAX_PCIGART_PAGES);
77 bzero(pci_gart, ATI_PCIGART_TABLE_SIZE);
78 /*CONSTCOND*/
79 ASSERT(PAGE_SIZE >= ATI_PCIGART_PAGE_SIZE);
80
81 dmah = entry->dmah_sg;
82 pagenum = 0;
83 for (i = 0; i < dmah->cookie_num; i++) {
84 bulksize = dmah->cookie.dmac_size;
85 for (k = 0; k < bulksize / PAGE_SIZE; k++) {
86 entry->busaddr[pagenum] =
87 dmah->cookie.dmac_address + k * PAGE_SIZE;
88 page_base = (u32) entry->busaddr[pagenum];
89 if (pagenum ++ == pages)
90 goto out;
91 for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
92 j++) {
93 if (gart_info->is_pcie)
94 *pci_gart = (page_base >> 8) | 0xc;
95 else
96 *pci_gart = page_base;
97 pci_gart++;
98 page_base += ATI_PCIGART_PAGE_SIZE;
99 }
100 }
101 ddi_dma_nextcookie(dmah->dma_hdl, &dmah->cookie);
102 }
103
104 out:
105 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
106 (void) ddi_dma_sync(entry->dmah_gart->dma_hdl, 0,
107 entry->dmah_gart->real_sz, DDI_DMA_SYNC_FORDEV);
108 }
109
110 return (1);
111 }
112
113 /*ARGSUSED*/
114 extern int
115 drm_ati_pcigart_cleanup(drm_device_t *dev, drm_ati_pcigart_info *gart_info)
116 {
117 drm_dma_handle_t *dmah;
118
119 if (dev->sg == NULL) {
120 DRM_ERROR("no scatter/gather memory!\n");
121 return (0);
122 }
123 dmah = dev->sg->dmah_gart;
124 dev->sg->dmah_gart = NULL;
125 if (dmah)
126 drm_pci_free(dev, dmah);
127 return (1);
128 }