This source file includes following definitions.
- vmw_gmr2_bind
- vmw_gmr2_unbind
- vmw_gmr_bind
- vmw_gmr_unbind
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28 #include <drm/ttm/ttm_bo_driver.h>
29
30 #include "vmwgfx_drv.h"
31
32 #define VMW_PPN_SIZE (sizeof(unsigned long))
33
34 #define VMW_PPN_PER_REMAP ((31 * 1024) / VMW_PPN_SIZE)
35 #define DMA_ADDR_INVALID ((dma_addr_t) 0)
36 #define DMA_PAGE_INVALID 0UL
37
38 static int vmw_gmr2_bind(struct vmw_private *dev_priv,
39 struct vmw_piter *iter,
40 unsigned long num_pages,
41 int gmr_id)
42 {
43 SVGAFifoCmdDefineGMR2 define_cmd;
44 SVGAFifoCmdRemapGMR2 remap_cmd;
45 uint32_t *cmd;
46 uint32_t *cmd_orig;
47 uint32_t define_size = sizeof(define_cmd) + sizeof(*cmd);
48 uint32_t remap_num = num_pages / VMW_PPN_PER_REMAP + ((num_pages % VMW_PPN_PER_REMAP) > 0);
49 uint32_t remap_size = VMW_PPN_SIZE * num_pages + (sizeof(remap_cmd) + sizeof(*cmd)) * remap_num;
50 uint32_t remap_pos = 0;
51 uint32_t cmd_size = define_size + remap_size;
52 uint32_t i;
53
54 cmd_orig = cmd = VMW_FIFO_RESERVE(dev_priv, cmd_size);
55 if (unlikely(cmd == NULL))
56 return -ENOMEM;
57
58 define_cmd.gmrId = gmr_id;
59 define_cmd.numPages = num_pages;
60
61 *cmd++ = SVGA_CMD_DEFINE_GMR2;
62 memcpy(cmd, &define_cmd, sizeof(define_cmd));
63 cmd += sizeof(define_cmd) / sizeof(*cmd);
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70 remap_cmd.gmrId = gmr_id;
71 remap_cmd.flags = (VMW_PPN_SIZE > sizeof(*cmd)) ?
72 SVGA_REMAP_GMR2_PPN64 : SVGA_REMAP_GMR2_PPN32;
73
74 while (num_pages > 0) {
75 unsigned long nr = min(num_pages, (unsigned long)VMW_PPN_PER_REMAP);
76
77 remap_cmd.offsetPages = remap_pos;
78 remap_cmd.numPages = nr;
79
80 *cmd++ = SVGA_CMD_REMAP_GMR2;
81 memcpy(cmd, &remap_cmd, sizeof(remap_cmd));
82 cmd += sizeof(remap_cmd) / sizeof(*cmd);
83
84 for (i = 0; i < nr; ++i) {
85 if (VMW_PPN_SIZE <= 4)
86 *cmd = vmw_piter_dma_addr(iter) >> PAGE_SHIFT;
87 else
88 *((uint64_t *)cmd) = vmw_piter_dma_addr(iter) >>
89 PAGE_SHIFT;
90
91 cmd += VMW_PPN_SIZE / sizeof(*cmd);
92 vmw_piter_next(iter);
93 }
94
95 num_pages -= nr;
96 remap_pos += nr;
97 }
98
99 BUG_ON(cmd != cmd_orig + cmd_size / sizeof(*cmd));
100
101 vmw_fifo_commit(dev_priv, cmd_size);
102
103 return 0;
104 }
105
106 static void vmw_gmr2_unbind(struct vmw_private *dev_priv,
107 int gmr_id)
108 {
109 SVGAFifoCmdDefineGMR2 define_cmd;
110 uint32_t define_size = sizeof(define_cmd) + 4;
111 uint32_t *cmd;
112
113 cmd = VMW_FIFO_RESERVE(dev_priv, define_size);
114 if (unlikely(cmd == NULL))
115 return;
116
117 define_cmd.gmrId = gmr_id;
118 define_cmd.numPages = 0;
119
120 *cmd++ = SVGA_CMD_DEFINE_GMR2;
121 memcpy(cmd, &define_cmd, sizeof(define_cmd));
122
123 vmw_fifo_commit(dev_priv, define_size);
124 }
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126
127 int vmw_gmr_bind(struct vmw_private *dev_priv,
128 const struct vmw_sg_table *vsgt,
129 unsigned long num_pages,
130 int gmr_id)
131 {
132 struct vmw_piter data_iter;
133
134 vmw_piter_start(&data_iter, vsgt, 0);
135
136 if (unlikely(!vmw_piter_next(&data_iter)))
137 return 0;
138
139 if (unlikely(!(dev_priv->capabilities & SVGA_CAP_GMR2)))
140 return -EINVAL;
141
142 return vmw_gmr2_bind(dev_priv, &data_iter, num_pages, gmr_id);
143 }
144
145
146 void vmw_gmr_unbind(struct vmw_private *dev_priv, int gmr_id)
147 {
148 if (likely(dev_priv->capabilities & SVGA_CAP_GMR2))
149 vmw_gmr2_unbind(dev_priv, gmr_id);
150 }