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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
15struct gr2d_soc {
16 unsigned int version;
17};
18
19struct gr2d {
20 struct tegra_drm_client client;
21 struct host1x_channel *channel;
22 struct clk *clk;
23
24 const struct gr2d_soc *soc;
25
26 DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
27};
28
29static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
30{
31 return container_of(client, struct gr2d, client);
32}
33
34static int gr2d_init(struct host1x_client *client)
35{
36 struct tegra_drm_client *drm = host1x_to_drm_client(client);
37 struct drm_device *dev = dev_get_drvdata(client->host);
38 unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
39 struct gr2d *gr2d = to_gr2d(drm);
40 int err;
41
42 gr2d->channel = host1x_channel_request(client);
43 if (!gr2d->channel)
44 return -ENOMEM;
45
46 client->syncpts[0] = host1x_syncpt_request(client, flags);
47 if (!client->syncpts[0]) {
48 err = -ENOMEM;
49 dev_err(client->dev, "failed to request syncpoint: %d\n", err);
50 goto put;
51 }
52
53 err = host1x_client_iommu_attach(client);
54 if (err < 0) {
55 dev_err(client->dev, "failed to attach to domain: %d\n", err);
56 goto free;
57 }
58
59 err = tegra_drm_register_client(dev->dev_private, drm);
60 if (err < 0) {
61 dev_err(client->dev, "failed to register client: %d\n", err);
62 goto detach;
63 }
64
65 return 0;
66
67detach:
68 host1x_client_iommu_detach(client);
69free:
70 host1x_syncpt_put(client->syncpts[0]);
71put:
72 host1x_channel_put(gr2d->channel);
73 return err;
74}
75
76static int gr2d_exit(struct host1x_client *client)
77{
78 struct tegra_drm_client *drm = host1x_to_drm_client(client);
79 struct drm_device *dev = dev_get_drvdata(client->host);
80 struct tegra_drm *tegra = dev->dev_private;
81 struct gr2d *gr2d = to_gr2d(drm);
82 int err;
83
84 err = tegra_drm_unregister_client(tegra, drm);
85 if (err < 0)
86 return err;
87
88 host1x_client_iommu_detach(client);
89 host1x_syncpt_put(client->syncpts[0]);
90 host1x_channel_put(gr2d->channel);
91
92 return 0;
93}
94
95static const struct host1x_client_ops gr2d_client_ops = {
96 .init = gr2d_init,
97 .exit = gr2d_exit,
98};
99
100static int gr2d_open_channel(struct tegra_drm_client *client,
101 struct tegra_drm_context *context)
102{
103 struct gr2d *gr2d = to_gr2d(client);
104
105 context->channel = host1x_channel_get(gr2d->channel);
106 if (!context->channel)
107 return -ENOMEM;
108
109 return 0;
110}
111
112static void gr2d_close_channel(struct tegra_drm_context *context)
113{
114 host1x_channel_put(context->channel);
115}
116
117static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
118{
119 struct gr2d *gr2d = dev_get_drvdata(dev);
120
121 switch (class) {
122 case HOST1X_CLASS_HOST1X:
123 if (offset == 0x2b)
124 return 1;
125
126 break;
127
128 case HOST1X_CLASS_GR2D:
129 case HOST1X_CLASS_GR2D_SB:
130 if (offset >= GR2D_NUM_REGS)
131 break;
132
133 if (test_bit(offset, gr2d->addr_regs))
134 return 1;
135
136 break;
137 }
138
139 return 0;
140}
141
142static int gr2d_is_valid_class(u32 class)
143{
144 return (class == HOST1X_CLASS_GR2D ||
145 class == HOST1X_CLASS_GR2D_SB);
146}
147
148static const struct tegra_drm_client_ops gr2d_ops = {
149 .open_channel = gr2d_open_channel,
150 .close_channel = gr2d_close_channel,
151 .is_addr_reg = gr2d_is_addr_reg,
152 .is_valid_class = gr2d_is_valid_class,
153 .submit = tegra_drm_submit,
154};
155
156static const struct gr2d_soc tegra20_gr2d_soc = {
157 .version = 0x20,
158};
159
160static const struct gr2d_soc tegra30_gr2d_soc = {
161 .version = 0x30,
162};
163
164static const struct gr2d_soc tegra114_gr2d_soc = {
165 .version = 0x35,
166};
167
168static const struct of_device_id gr2d_match[] = {
169 { .compatible = "nvidia,tegra114-gr2d", .data = &tegra114_gr2d_soc },
170 { .compatible = "nvidia,tegra30-gr2d", .data = &tegra30_gr2d_soc },
171 { .compatible = "nvidia,tegra20-gr2d", .data = &tegra20_gr2d_soc },
172 { },
173};
174MODULE_DEVICE_TABLE(of, gr2d_match);
175
176static const u32 gr2d_addr_regs[] = {
177 GR2D_UA_BASE_ADDR,
178 GR2D_VA_BASE_ADDR,
179 GR2D_PAT_BASE_ADDR,
180 GR2D_DSTA_BASE_ADDR,
181 GR2D_DSTB_BASE_ADDR,
182 GR2D_DSTC_BASE_ADDR,
183 GR2D_SRCA_BASE_ADDR,
184 GR2D_SRCB_BASE_ADDR,
185 GR2D_PATBASE_ADDR,
186 GR2D_SRC_BASE_ADDR_SB,
187 GR2D_DSTA_BASE_ADDR_SB,
188 GR2D_DSTB_BASE_ADDR_SB,
189 GR2D_UA_BASE_ADDR_SB,
190 GR2D_VA_BASE_ADDR_SB,
191};
192
193static int gr2d_probe(struct platform_device *pdev)
194{
195 struct device *dev = &pdev->dev;
196 struct host1x_syncpt **syncpts;
197 struct gr2d *gr2d;
198 unsigned int i;
199 int err;
200
201 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
202 if (!gr2d)
203 return -ENOMEM;
204
205 gr2d->soc = of_device_get_match_data(dev);
206
207 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
208 if (!syncpts)
209 return -ENOMEM;
210
211 gr2d->clk = devm_clk_get(dev, NULL);
212 if (IS_ERR(gr2d->clk)) {
213 dev_err(dev, "cannot get clock\n");
214 return PTR_ERR(gr2d->clk);
215 }
216
217 err = clk_prepare_enable(gr2d->clk);
218 if (err) {
219 dev_err(dev, "cannot turn on clock\n");
220 return err;
221 }
222
223 INIT_LIST_HEAD(&gr2d->client.base.list);
224 gr2d->client.base.ops = &gr2d_client_ops;
225 gr2d->client.base.dev = dev;
226 gr2d->client.base.class = HOST1X_CLASS_GR2D;
227 gr2d->client.base.syncpts = syncpts;
228 gr2d->client.base.num_syncpts = 1;
229
230 INIT_LIST_HEAD(&gr2d->client.list);
231 gr2d->client.version = gr2d->soc->version;
232 gr2d->client.ops = &gr2d_ops;
233
234 err = host1x_client_register(&gr2d->client.base);
235 if (err < 0) {
236 dev_err(dev, "failed to register host1x client: %d\n", err);
237 clk_disable_unprepare(gr2d->clk);
238 return err;
239 }
240
241
242 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
243 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
244
245 platform_set_drvdata(pdev, gr2d);
246
247 return 0;
248}
249
250static int gr2d_remove(struct platform_device *pdev)
251{
252 struct gr2d *gr2d = platform_get_drvdata(pdev);
253 int err;
254
255 err = host1x_client_unregister(&gr2d->client.base);
256 if (err < 0) {
257 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
258 err);
259 return err;
260 }
261
262 clk_disable_unprepare(gr2d->clk);
263
264 return 0;
265}
266
267struct platform_driver tegra_gr2d_driver = {
268 .driver = {
269 .name = "tegra-gr2d",
270 .of_match_table = gr2d_match,
271 },
272 .probe = gr2d_probe,
273 .remove = gr2d_remove,
274};
275
