This source file includes following definitions.
- to_gr2d
- gr2d_init
- gr2d_exit
- gr2d_open_channel
- gr2d_close_channel
- gr2d_is_addr_reg
- gr2d_is_valid_class
- gr2d_probe
- gr2d_remove
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5
6 #include <linux/clk.h>
7 #include <linux/iommu.h>
8 #include <linux/module.h>
9 #include <linux/of_device.h>
10
11 #include "drm.h"
12 #include "gem.h"
13 #include "gr2d.h"
14
15 struct gr2d_soc {
16 unsigned int version;
17 };
18
19 struct gr2d {
20 struct iommu_group *group;
21 struct tegra_drm_client client;
22 struct host1x_channel *channel;
23 struct clk *clk;
24
25 const struct gr2d_soc *soc;
26
27 DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
28 };
29
30 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
31 {
32 return container_of(client, struct gr2d, client);
33 }
34
35 static int gr2d_init(struct host1x_client *client)
36 {
37 struct tegra_drm_client *drm = host1x_to_drm_client(client);
38 struct drm_device *dev = dev_get_drvdata(client->parent);
39 unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
40 struct gr2d *gr2d = to_gr2d(drm);
41 int err;
42
43 gr2d->channel = host1x_channel_request(client->dev);
44 if (!gr2d->channel)
45 return -ENOMEM;
46
47 client->syncpts[0] = host1x_syncpt_request(client, flags);
48 if (!client->syncpts[0]) {
49 err = -ENOMEM;
50 dev_err(client->dev, "failed to request syncpoint: %d\n", err);
51 goto put;
52 }
53
54 gr2d->group = host1x_client_iommu_attach(client, false);
55 if (IS_ERR(gr2d->group)) {
56 err = PTR_ERR(gr2d->group);
57 dev_err(client->dev, "failed to attach to domain: %d\n", err);
58 goto free;
59 }
60
61 err = tegra_drm_register_client(dev->dev_private, drm);
62 if (err < 0) {
63 dev_err(client->dev, "failed to register client: %d\n", err);
64 goto detach;
65 }
66
67 return 0;
68
69 detach:
70 host1x_client_iommu_detach(client, gr2d->group);
71 free:
72 host1x_syncpt_free(client->syncpts[0]);
73 put:
74 host1x_channel_put(gr2d->channel);
75 return err;
76 }
77
78 static int gr2d_exit(struct host1x_client *client)
79 {
80 struct tegra_drm_client *drm = host1x_to_drm_client(client);
81 struct drm_device *dev = dev_get_drvdata(client->parent);
82 struct tegra_drm *tegra = dev->dev_private;
83 struct gr2d *gr2d = to_gr2d(drm);
84 int err;
85
86 err = tegra_drm_unregister_client(tegra, drm);
87 if (err < 0)
88 return err;
89
90 host1x_client_iommu_detach(client, gr2d->group);
91 host1x_syncpt_free(client->syncpts[0]);
92 host1x_channel_put(gr2d->channel);
93
94 return 0;
95 }
96
97 static const struct host1x_client_ops gr2d_client_ops = {
98 .init = gr2d_init,
99 .exit = gr2d_exit,
100 };
101
102 static int gr2d_open_channel(struct tegra_drm_client *client,
103 struct tegra_drm_context *context)
104 {
105 struct gr2d *gr2d = to_gr2d(client);
106
107 context->channel = host1x_channel_get(gr2d->channel);
108 if (!context->channel)
109 return -ENOMEM;
110
111 return 0;
112 }
113
114 static void gr2d_close_channel(struct tegra_drm_context *context)
115 {
116 host1x_channel_put(context->channel);
117 }
118
119 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
120 {
121 struct gr2d *gr2d = dev_get_drvdata(dev);
122
123 switch (class) {
124 case HOST1X_CLASS_HOST1X:
125 if (offset == 0x2b)
126 return 1;
127
128 break;
129
130 case HOST1X_CLASS_GR2D:
131 case HOST1X_CLASS_GR2D_SB:
132 if (offset >= GR2D_NUM_REGS)
133 break;
134
135 if (test_bit(offset, gr2d->addr_regs))
136 return 1;
137
138 break;
139 }
140
141 return 0;
142 }
143
144 static int gr2d_is_valid_class(u32 class)
145 {
146 return (class == HOST1X_CLASS_GR2D ||
147 class == HOST1X_CLASS_GR2D_SB);
148 }
149
150 static const struct tegra_drm_client_ops gr2d_ops = {
151 .open_channel = gr2d_open_channel,
152 .close_channel = gr2d_close_channel,
153 .is_addr_reg = gr2d_is_addr_reg,
154 .is_valid_class = gr2d_is_valid_class,
155 .submit = tegra_drm_submit,
156 };
157
158 static const struct gr2d_soc tegra20_gr2d_soc = {
159 .version = 0x20,
160 };
161
162 static const struct gr2d_soc tegra30_gr2d_soc = {
163 .version = 0x30,
164 };
165
166 static const struct of_device_id gr2d_match[] = {
167 { .compatible = "nvidia,tegra30-gr2d", .data = &tegra20_gr2d_soc },
168 { .compatible = "nvidia,tegra20-gr2d", .data = &tegra30_gr2d_soc },
169 { },
170 };
171 MODULE_DEVICE_TABLE(of, gr2d_match);
172
173 static const u32 gr2d_addr_regs[] = {
174 GR2D_UA_BASE_ADDR,
175 GR2D_VA_BASE_ADDR,
176 GR2D_PAT_BASE_ADDR,
177 GR2D_DSTA_BASE_ADDR,
178 GR2D_DSTB_BASE_ADDR,
179 GR2D_DSTC_BASE_ADDR,
180 GR2D_SRCA_BASE_ADDR,
181 GR2D_SRCB_BASE_ADDR,
182 GR2D_SRC_BASE_ADDR_SB,
183 GR2D_DSTA_BASE_ADDR_SB,
184 GR2D_DSTB_BASE_ADDR_SB,
185 GR2D_UA_BASE_ADDR_SB,
186 GR2D_VA_BASE_ADDR_SB,
187 };
188
189 static int gr2d_probe(struct platform_device *pdev)
190 {
191 struct device *dev = &pdev->dev;
192 struct host1x_syncpt **syncpts;
193 struct gr2d *gr2d;
194 unsigned int i;
195 int err;
196
197 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
198 if (!gr2d)
199 return -ENOMEM;
200
201 gr2d->soc = of_device_get_match_data(dev);
202
203 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
204 if (!syncpts)
205 return -ENOMEM;
206
207 gr2d->clk = devm_clk_get(dev, NULL);
208 if (IS_ERR(gr2d->clk)) {
209 dev_err(dev, "cannot get clock\n");
210 return PTR_ERR(gr2d->clk);
211 }
212
213 err = clk_prepare_enable(gr2d->clk);
214 if (err) {
215 dev_err(dev, "cannot turn on clock\n");
216 return err;
217 }
218
219 INIT_LIST_HEAD(&gr2d->client.base.list);
220 gr2d->client.base.ops = &gr2d_client_ops;
221 gr2d->client.base.dev = dev;
222 gr2d->client.base.class = HOST1X_CLASS_GR2D;
223 gr2d->client.base.syncpts = syncpts;
224 gr2d->client.base.num_syncpts = 1;
225
226 INIT_LIST_HEAD(&gr2d->client.list);
227 gr2d->client.version = gr2d->soc->version;
228 gr2d->client.ops = &gr2d_ops;
229
230 err = host1x_client_register(&gr2d->client.base);
231 if (err < 0) {
232 dev_err(dev, "failed to register host1x client: %d\n", err);
233 clk_disable_unprepare(gr2d->clk);
234 return err;
235 }
236
237
238 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
239 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
240
241 platform_set_drvdata(pdev, gr2d);
242
243 return 0;
244 }
245
246 static int gr2d_remove(struct platform_device *pdev)
247 {
248 struct gr2d *gr2d = platform_get_drvdata(pdev);
249 int err;
250
251 err = host1x_client_unregister(&gr2d->client.base);
252 if (err < 0) {
253 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
254 err);
255 return err;
256 }
257
258 clk_disable_unprepare(gr2d->clk);
259
260 return 0;
261 }
262
263 struct platform_driver tegra_gr2d_driver = {
264 .driver = {
265 .name = "tegra-gr2d",
266 .of_match_table = gr2d_match,
267 },
268 .probe = gr2d_probe,
269 .remove = gr2d_remove,
270 };