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drm_scatter.c (254025) drm_scatter.c (280183)
1/*-
2 * Copyright (c) 2009 Robert C. Noland III <rnoland@FreeBSD.org>
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

--- 9 unchanged lines hidden (view full) ---

18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 2009 Robert C. Noland III <rnoland@FreeBSD.org>
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

--- 9 unchanged lines hidden (view full) ---

18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD: head/sys/dev/drm2/drm_scatter.c 254025 2013-08-07 06:21:20Z jeff $");
26__FBSDID("$FreeBSD: head/sys/dev/drm2/drm_scatter.c 280183 2015-03-17 18:50:33Z dumbbell $");
27
28/** @file drm_scatter.c
29 * Allocation of memory for scatter-gather mappings by the graphics chip.
30 * The memory allocated here is then made into an aperture in the card
31 * by mapping the pages into the GART.
32 */
33
34#include <dev/drm2/drmP.h>
35
27
28/** @file drm_scatter.c
29 * Allocation of memory for scatter-gather mappings by the graphics chip.
30 * The memory allocated here is then made into an aperture in the card
31 * by mapping the pages into the GART.
32 */
33
34#include <dev/drm2/drmP.h>
35
36int
37drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather *request)
36#define DEBUG_SCATTER 0
37
38static inline vm_offset_t drm_vmalloc_dma(vm_size_t size)
38{
39{
40 return kmem_alloc_attr(kernel_arena, size, M_NOWAIT | M_ZERO,
41 0, BUS_SPACE_MAXADDR_32BIT, VM_MEMATTR_WRITE_COMBINING);
42}
43
44void drm_sg_cleanup(struct drm_sg_mem * entry)
45{
46 if (entry == NULL)
47 return;
48
49 if (entry->vaddr != 0)
50 kmem_free(kernel_arena, entry->vaddr, IDX_TO_OFF(entry->pages));
51
52 free(entry->busaddr, DRM_MEM_SGLISTS);
53 free(entry, DRM_MEM_DRIVER);
54}
55
56int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request)
57{
39 struct drm_sg_mem *entry;
40 vm_size_t size;
41 vm_pindex_t pindex;
42
58 struct drm_sg_mem *entry;
59 vm_size_t size;
60 vm_pindex_t pindex;
61
62 DRM_DEBUG("\n");
63
64 if (!drm_core_check_feature(dev, DRIVER_SG))
65 return -EINVAL;
66
43 if (dev->sg)
67 if (dev->sg)
44 return EINVAL;
68 return -EINVAL;
45
69
70 entry = malloc(sizeof(*entry), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
71 if (!entry)
72 return -ENOMEM;
73
46 DRM_DEBUG("request size=%ld\n", request->size);
47
74 DRM_DEBUG("request size=%ld\n", request->size);
75
48 entry = malloc(sizeof(*entry), DRM_MEM_DRIVER, M_WAITOK | M_ZERO);
49
50 size = round_page(request->size);
51 entry->pages = OFF_TO_IDX(size);
52 entry->busaddr = malloc(entry->pages * sizeof(*entry->busaddr),
76 size = round_page(request->size);
77 entry->pages = OFF_TO_IDX(size);
78 entry->busaddr = malloc(entry->pages * sizeof(*entry->busaddr),
53 DRM_MEM_SGLISTS, M_WAITOK | M_ZERO);
79 DRM_MEM_SGLISTS, M_NOWAIT | M_ZERO);
80 if (!entry->busaddr) {
81 free(entry, DRM_MEM_DRIVER);
82 return -ENOMEM;
83 }
54
84
55 entry->vaddr = kmem_alloc_attr(kernel_arena, size, M_WAITOK | M_ZERO,
56 0, BUS_SPACE_MAXADDR_32BIT, VM_MEMATTR_WRITE_COMBINING);
85 entry->vaddr = drm_vmalloc_dma(size);
57 if (entry->vaddr == 0) {
86 if (entry->vaddr == 0) {
58 drm_sg_cleanup(entry);
59 return (ENOMEM);
87 free(entry->busaddr, DRM_MEM_DRIVER);
88 free(entry, DRM_MEM_DRIVER);
89 return -ENOMEM;
60 }
61
90 }
91
62 for(pindex = 0; pindex < entry->pages; pindex++) {
92 for (pindex = 0; pindex < entry->pages; pindex++) {
63 entry->busaddr[pindex] =
64 vtophys(entry->vaddr + IDX_TO_OFF(pindex));
65 }
66
93 entry->busaddr[pindex] =
94 vtophys(entry->vaddr + IDX_TO_OFF(pindex));
95 }
96
67 DRM_LOCK(dev);
68 if (dev->sg) {
69 DRM_UNLOCK(dev);
70 drm_sg_cleanup(entry);
71 return (EINVAL);
72 }
73 dev->sg = entry;
74 DRM_UNLOCK(dev);
75
76 request->handle = entry->vaddr;
77
97 request->handle = entry->vaddr;
98
99 dev->sg = entry;
100
78 DRM_DEBUG("allocated %ju pages @ 0x%08zx, contents=%08lx\n",
79 entry->pages, entry->vaddr, *(unsigned long *)entry->vaddr);
80
101 DRM_DEBUG("allocated %ju pages @ 0x%08zx, contents=%08lx\n",
102 entry->pages, entry->vaddr, *(unsigned long *)entry->vaddr);
103
81 return (0);
104 return 0;
82}
83
105}
106
84int
85drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
86 struct drm_file *file_priv)
107int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
108 struct drm_file *file_priv)
87{
88 struct drm_scatter_gather *request = data;
89
109{
110 struct drm_scatter_gather *request = data;
111
90 DRM_DEBUG("\n");
112 return drm_sg_alloc(dev, request);
91
113
92 return (drm_sg_alloc(dev, request));
93}
94
114}
115
95void
96drm_sg_cleanup(struct drm_sg_mem *entry)
116int drm_sg_free(struct drm_device *dev, void *data,
117 struct drm_file *file_priv)
97{
118{
98 if (entry == NULL)
99 return;
100
101 if (entry->vaddr != 0)
102 kmem_free(kernel_arena, entry->vaddr, IDX_TO_OFF(entry->pages));
103
104 free(entry->busaddr, DRM_MEM_SGLISTS);
105 free(entry, DRM_MEM_DRIVER);
106
107 return;
108}
109
110int
111drm_sg_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
112{
113 struct drm_scatter_gather *request = data;
114 struct drm_sg_mem *entry;
115
119 struct drm_scatter_gather *request = data;
120 struct drm_sg_mem *entry;
121
116 DRM_LOCK(dev);
122 if (!drm_core_check_feature(dev, DRIVER_SG))
123 return -EINVAL;
124
117 entry = dev->sg;
118 dev->sg = NULL;
125 entry = dev->sg;
126 dev->sg = NULL;
119 DRM_UNLOCK(dev);
120
121 if (!entry || entry->vaddr != request->handle)
127
128 if (!entry || entry->vaddr != request->handle)
122 return (EINVAL);
129 return -EINVAL;
123
124 DRM_DEBUG("free 0x%zx\n", entry->vaddr);
125
126 drm_sg_cleanup(entry);
127
130
131 DRM_DEBUG("free 0x%zx\n", entry->vaddr);
132
133 drm_sg_cleanup(entry);
134
128 return (0);
135 return 0;
129}
136}