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4b223eef | 1 | /* |
310ff414 | 2 | * Copyright 2011 Red Hat Inc. |
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3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | * OTHER DEALINGS IN THE SOFTWARE. | |
21 | * | |
22 | * Authors: Ben Skeggs | |
23 | */ | |
24 | ||
760285e7 | 25 | #include <drm/drmP.h> |
4b223eef | 26 | #include "nouveau_drv.h" |
760285e7 | 27 | #include <drm/nouveau_drm.h> |
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28 | |
29 | struct nvc0_fb_priv { | |
30 | struct page *r100c10_page; | |
31 | dma_addr_t r100c10; | |
32 | }; | |
33 | ||
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34 | static inline void |
35 | nvc0_mfb_subp_isr(struct drm_device *dev, int unit, int subp) | |
36 | { | |
37 | u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400); | |
38 | u32 stat = nv_rd32(dev, subp_base + 0x020); | |
39 | ||
40 | if (stat) { | |
41 | NV_INFO(dev, "PMFB%d_SUBP%d: 0x%08x\n", unit, subp, stat); | |
42 | nv_wr32(dev, subp_base + 0x020, stat); | |
43 | } | |
44 | } | |
45 | ||
46 | static void | |
47 | nvc0_mfb_isr(struct drm_device *dev) | |
48 | { | |
49 | u32 units = nv_rd32(dev, 0x00017c); | |
50 | while (units) { | |
51 | u32 subp, unit = ffs(units) - 1; | |
52 | for (subp = 0; subp < 2; subp++) | |
53 | nvc0_mfb_subp_isr(dev, unit, subp); | |
54 | units &= ~(1 << unit); | |
55 | } | |
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56 | |
57 | /* we do something horribly wrong and upset PMFB a lot, so mask off | |
58 | * interrupts from it after the first one until it's fixed | |
59 | */ | |
60 | nv_mask(dev, 0x000640, 0x02000000, 0x00000000); | |
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61 | } |
62 | ||
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63 | static void |
64 | nvc0_fb_destroy(struct drm_device *dev) | |
65 | { | |
66 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
67 | struct nouveau_fb_engine *pfb = &dev_priv->engine.fb; | |
68 | struct nvc0_fb_priv *priv = pfb->priv; | |
69 | ||
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70 | nouveau_irq_unregister(dev, 25); |
71 | ||
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72 | if (priv->r100c10_page) { |
73 | pci_unmap_page(dev->pdev, priv->r100c10, PAGE_SIZE, | |
74 | PCI_DMA_BIDIRECTIONAL); | |
75 | __free_page(priv->r100c10_page); | |
76 | } | |
77 | ||
78 | kfree(priv); | |
79 | pfb->priv = NULL; | |
80 | } | |
81 | ||
82 | static int | |
83 | nvc0_fb_create(struct drm_device *dev) | |
84 | { | |
85 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
86 | struct nouveau_fb_engine *pfb = &dev_priv->engine.fb; | |
87 | struct nvc0_fb_priv *priv; | |
88 | ||
89 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
90 | if (!priv) | |
91 | return -ENOMEM; | |
92 | pfb->priv = priv; | |
93 | ||
94 | priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
95 | if (!priv->r100c10_page) { | |
96 | nvc0_fb_destroy(dev); | |
97 | return -ENOMEM; | |
98 | } | |
99 | ||
100 | priv->r100c10 = pci_map_page(dev->pdev, priv->r100c10_page, 0, | |
101 | PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); | |
102 | if (pci_dma_mapping_error(dev->pdev, priv->r100c10)) { | |
103 | nvc0_fb_destroy(dev); | |
104 | return -EFAULT; | |
105 | } | |
106 | ||
a1484512 | 107 | nouveau_irq_register(dev, 25, nvc0_mfb_isr); |
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108 | return 0; |
109 | } | |
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110 | |
111 | int | |
112 | nvc0_fb_init(struct drm_device *dev) | |
113 | { | |
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114 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
115 | struct nvc0_fb_priv *priv; | |
116 | int ret; | |
117 | ||
118 | if (!dev_priv->engine.fb.priv) { | |
119 | ret = nvc0_fb_create(dev); | |
120 | if (ret) | |
121 | return ret; | |
122 | } | |
123 | priv = dev_priv->engine.fb.priv; | |
124 | ||
125 | nv_wr32(dev, 0x100c10, priv->r100c10 >> 8); | |
79eee7aa | 126 | nv_mask(dev, 0x17e820, 0x00100000, 0x00000000); /* NV_PLTCG_INTR_EN */ |
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127 | return 0; |
128 | } | |
129 | ||
130 | void | |
131 | nvc0_fb_takedown(struct drm_device *dev) | |
132 | { | |
310ff414 | 133 | nvc0_fb_destroy(dev); |
4b223eef | 134 | } |