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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
Dave Airlieb5e89ed2005-09-25 14:28:13 +10002 * \file ati_pcigart.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * ATI PCI GART support
4 *
5 * \author Gareth Hughes <gareth@valinux.com>
6 */
7
8/*
9 * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
10 *
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
23 * Software.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
31 * DEALINGS IN THE SOFTWARE.
32 */
33
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040034#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "drmP.h"
36
Linus Torvalds1da177e2005-04-16 15:20:36 -070037# define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
38
Dave Airlieb05c2382008-03-17 10:24:24 +100039static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
40 struct drm_ati_pcigart_info *gart_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041{
Dave Airlieb05c2382008-03-17 10:24:24 +100042 gart_info->table_handle = drm_pci_alloc(dev, gart_info->table_size,
Zhenyu Wange6be8d92010-01-05 11:25:05 +080043 PAGE_SIZE);
Dave Airlieb05c2382008-03-17 10:24:24 +100044 if (gart_info->table_handle == NULL)
45 return -ENOMEM;
Dave Airlief2b04cd2007-05-08 15:19:23 +100046
Dave Airlieb05c2382008-03-17 10:24:24 +100047 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048}
49
Dave Airlieb05c2382008-03-17 10:24:24 +100050static void drm_ati_free_pcigart_table(struct drm_device *dev,
51 struct drm_ati_pcigart_info *gart_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
Dave Airlieb05c2382008-03-17 10:24:24 +100053 drm_pci_free(dev, gart_info->table_handle);
54 gart_info->table_handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055}
56
Dave Airlie55910512007-07-11 16:53:40 +100057int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
Dave Airlie55910512007-07-11 16:53:40 +100059 struct drm_sg_mem *entry = dev->sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 unsigned long pages;
61 int i;
Dave Airlieb05c2382008-03-17 10:24:24 +100062 int max_pages;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64 /* we need to support large memory configurations */
Dave Airlieb5e89ed2005-09-25 14:28:13 +100065 if (!entry) {
66 DRM_ERROR("no scatter/gather memory!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 return 0;
68 }
69
Dave Airlieea98a922005-09-11 20:28:11 +100070 if (gart_info->bus_addr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Dave Airlief2b04cd2007-05-08 15:19:23 +100072 max_pages = (gart_info->table_size / sizeof(u32));
73 pages = (entry->pages <= max_pages)
74 ? entry->pages : max_pages;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Dave Airlieb5e89ed2005-09-25 14:28:13 +100076 for (i = 0; i < pages; i++) {
77 if (!entry->busaddr[i])
78 break;
Dave Airlie7ec700f2008-06-19 11:27:23 +100079 pci_unmap_page(dev->pdev, entry->busaddr[i],
David Miller296c6ae2009-02-12 02:15:34 -080080 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +100082
83 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
84 gart_info->bus_addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 }
86
Dave Airlieb05c2382008-03-17 10:24:24 +100087 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN &&
88 gart_info->table_handle) {
89 drm_ati_free_pcigart_table(dev, gart_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 }
91
92 return 1;
93}
94EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
95
Dave Airlie55910512007-07-11 16:53:40 +100096int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097{
David Miller5a7aad92009-02-12 02:15:27 -080098 struct drm_local_map *map = &gart_info->mapping;
Dave Airlie55910512007-07-11 16:53:40 +100099 struct drm_sg_mem *entry = dev->sg;
Dave Airlief26c4732006-01-02 17:18:39 +1100100 void *address = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 unsigned long pages;
Dave Airlie6abf6602009-02-26 10:13:47 +1000102 u32 *pci_gart = NULL, page_base, gart_idx;
Dave Airlieb05c2382008-03-17 10:24:24 +1000103 dma_addr_t bus_address = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 int i, j, ret = 0;
David Millerd30333b2009-02-15 01:08:07 -0800105 int max_ati_pages, max_real_pages;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000107 if (!entry) {
108 DRM_ERROR("no scatter/gather memory!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 goto done;
110 }
111
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000112 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
Dave Airlieea98a922005-09-11 20:28:11 +1000113 DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000114
Zhenyu Wange6be8d92010-01-05 11:25:05 +0800115 if (pci_set_dma_mask(dev->pdev, gart_info->table_mask)) {
116 DRM_ERROR("fail to set dma mask to 0x%Lx\n",
Randy Dunlapd7748ba2010-02-02 14:40:33 -0800117 (unsigned long long)gart_info->table_mask);
Zhenyu Wange6be8d92010-01-05 11:25:05 +0800118 ret = 1;
119 goto done;
120 }
121
Dave Airlieb05c2382008-03-17 10:24:24 +1000122 ret = drm_ati_alloc_pcigart_table(dev, gart_info);
123 if (ret) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000124 DRM_ERROR("cannot allocate PCI GART page!\n");
Dave Airlieea98a922005-09-11 20:28:11 +1000125 goto done;
126 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000127
Dave Airlie6abf6602009-02-26 10:13:47 +1000128 pci_gart = gart_info->table_handle->vaddr;
Dave Airlieb05c2382008-03-17 10:24:24 +1000129 address = gart_info->table_handle->vaddr;
130 bus_address = gart_info->table_handle->busaddr;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000131 } else {
Dave Airlieea98a922005-09-11 20:28:11 +1000132 address = gart_info->addr;
133 bus_address = gart_info->bus_addr;
Andrew Mortonf67e74c2008-03-28 14:15:49 -0700134 DRM_DEBUG("PCI: Gart Table: VRAM %08LX mapped at %08lX\n",
135 (unsigned long long)bus_address,
136 (unsigned long)address);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 }
138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
David Millerd30333b2009-02-15 01:08:07 -0800140 max_ati_pages = (gart_info->table_size / sizeof(u32));
141 max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
142 pages = (entry->pages <= max_real_pages)
143 ? entry->pages : max_real_pages;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
David Miller5a7aad92009-02-12 02:15:27 -0800145 if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
David Millerd30333b2009-02-15 01:08:07 -0800146 memset(pci_gart, 0, max_ati_pages * sizeof(u32));
David Miller5a7aad92009-02-12 02:15:27 -0800147 } else {
Dave Airlie6abf6602009-02-26 10:13:47 +1000148 memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32));
David Miller5a7aad92009-02-12 02:15:27 -0800149 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
David Miller5a7aad92009-02-12 02:15:27 -0800151 gart_idx = 0;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000152 for (i = 0; i < pages; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 /* we need to support large memory configurations */
Dave Airlie7ec700f2008-06-19 11:27:23 +1000154 entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
David Miller296c6ae2009-02-12 02:15:34 -0800155 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
Benjamin Herrenschmidta30f6fb72010-08-10 14:48:58 +1000156 if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000157 DRM_ERROR("unable to map PCIGART pages!\n");
Dave Airlieea98a922005-09-11 20:28:11 +1000158 drm_ati_pcigart_cleanup(dev, gart_info);
Dave Airlief26c4732006-01-02 17:18:39 +1100159 address = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 bus_address = 0;
161 goto done;
162 }
163 page_base = (u32) entry->busaddr[i];
164
165 for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
David Miller5a7aad92009-02-12 02:15:27 -0800166 u32 val;
167
Dave Airlief2b04cd2007-05-08 15:19:23 +1000168 switch(gart_info->gart_reg_if) {
169 case DRM_ATI_GART_IGP:
David Miller5a7aad92009-02-12 02:15:27 -0800170 val = page_base | 0xc;
Dave Airlief2b04cd2007-05-08 15:19:23 +1000171 break;
172 case DRM_ATI_GART_PCIE:
David Miller5a7aad92009-02-12 02:15:27 -0800173 val = (page_base >> 8) | 0xc;
Dave Airlief2b04cd2007-05-08 15:19:23 +1000174 break;
175 default:
176 case DRM_ATI_GART_PCI:
David Miller5a7aad92009-02-12 02:15:27 -0800177 val = page_base;
Dave Airlief2b04cd2007-05-08 15:19:23 +1000178 break;
179 }
David Miller5a7aad92009-02-12 02:15:27 -0800180 if (gart_info->gart_table_location ==
181 DRM_ATI_GART_MAIN)
182 pci_gart[gart_idx] = cpu_to_le32(val);
183 else
184 DRM_WRITE32(map, gart_idx * sizeof(u32), val);
185 gart_idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 page_base += ATI_PCIGART_PAGE_SIZE;
187 }
188 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 ret = 1;
190
191#if defined(__i386__) || defined(__x86_64__)
192 wbinvd();
193#else
194 mb();
195#endif
196
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000197 done:
Dave Airlieea98a922005-09-11 20:28:11 +1000198 gart_info->addr = address;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000199 gart_info->bus_addr = bus_address;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 return ret;
201}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202EXPORT_SYMBOL(drm_ati_pcigart_init);