1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2012-2013, NVIDIA Corporation.
4 */
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 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
to_gr2d(struct tegra_drm_client * client)29 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
30 {
31 return container_of(client, struct gr2d, client);
32 }
33
gr2d_init(struct host1x_client * client)34 static 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
67 detach:
68 host1x_client_iommu_detach(client);
69 free:
70 host1x_syncpt_free(client->syncpts[0]);
71 put:
72 host1x_channel_put(gr2d->channel);
73 return err;
74 }
75
gr2d_exit(struct host1x_client * client)76 static 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_free(client->syncpts[0]);
90 host1x_channel_put(gr2d->channel);
91
92 return 0;
93 }
94
95 static const struct host1x_client_ops gr2d_client_ops = {
96 .init = gr2d_init,
97 .exit = gr2d_exit,
98 };
99
gr2d_open_channel(struct tegra_drm_client * client,struct tegra_drm_context * context)100 static 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
gr2d_close_channel(struct tegra_drm_context * context)112 static void gr2d_close_channel(struct tegra_drm_context *context)
113 {
114 host1x_channel_put(context->channel);
115 }
116
gr2d_is_addr_reg(struct device * dev,u32 class,u32 offset)117 static 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
gr2d_is_valid_class(u32 class)142 static int gr2d_is_valid_class(u32 class)
143 {
144 return (class == HOST1X_CLASS_GR2D ||
145 class == HOST1X_CLASS_GR2D_SB);
146 }
147
148 static 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
156 static const struct gr2d_soc tegra20_gr2d_soc = {
157 .version = 0x20,
158 };
159
160 static const struct gr2d_soc tegra30_gr2d_soc = {
161 .version = 0x30,
162 };
163
164 static const struct of_device_id gr2d_match[] = {
165 { .compatible = "nvidia,tegra30-gr2d", .data = &tegra20_gr2d_soc },
166 { .compatible = "nvidia,tegra20-gr2d", .data = &tegra30_gr2d_soc },
167 { },
168 };
169 MODULE_DEVICE_TABLE(of, gr2d_match);
170
171 static const u32 gr2d_addr_regs[] = {
172 GR2D_UA_BASE_ADDR,
173 GR2D_VA_BASE_ADDR,
174 GR2D_PAT_BASE_ADDR,
175 GR2D_DSTA_BASE_ADDR,
176 GR2D_DSTB_BASE_ADDR,
177 GR2D_DSTC_BASE_ADDR,
178 GR2D_SRCA_BASE_ADDR,
179 GR2D_SRCB_BASE_ADDR,
180 GR2D_PATBASE_ADDR,
181 GR2D_SRC_BASE_ADDR_SB,
182 GR2D_DSTA_BASE_ADDR_SB,
183 GR2D_DSTB_BASE_ADDR_SB,
184 GR2D_UA_BASE_ADDR_SB,
185 GR2D_VA_BASE_ADDR_SB,
186 };
187
gr2d_probe(struct platform_device * pdev)188 static int gr2d_probe(struct platform_device *pdev)
189 {
190 struct device *dev = &pdev->dev;
191 struct host1x_syncpt **syncpts;
192 struct gr2d *gr2d;
193 unsigned int i;
194 int err;
195
196 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
197 if (!gr2d)
198 return -ENOMEM;
199
200 gr2d->soc = of_device_get_match_data(dev);
201
202 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
203 if (!syncpts)
204 return -ENOMEM;
205
206 gr2d->clk = devm_clk_get(dev, NULL);
207 if (IS_ERR(gr2d->clk)) {
208 dev_err(dev, "cannot get clock\n");
209 return PTR_ERR(gr2d->clk);
210 }
211
212 err = clk_prepare_enable(gr2d->clk);
213 if (err) {
214 dev_err(dev, "cannot turn on clock\n");
215 return err;
216 }
217
218 INIT_LIST_HEAD(&gr2d->client.base.list);
219 gr2d->client.base.ops = &gr2d_client_ops;
220 gr2d->client.base.dev = dev;
221 gr2d->client.base.class = HOST1X_CLASS_GR2D;
222 gr2d->client.base.syncpts = syncpts;
223 gr2d->client.base.num_syncpts = 1;
224
225 INIT_LIST_HEAD(&gr2d->client.list);
226 gr2d->client.version = gr2d->soc->version;
227 gr2d->client.ops = &gr2d_ops;
228
229 err = host1x_client_register(&gr2d->client.base);
230 if (err < 0) {
231 dev_err(dev, "failed to register host1x client: %d\n", err);
232 clk_disable_unprepare(gr2d->clk);
233 return err;
234 }
235
236 /* initialize address register map */
237 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
238 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
239
240 platform_set_drvdata(pdev, gr2d);
241
242 return 0;
243 }
244
gr2d_remove(struct platform_device * pdev)245 static int gr2d_remove(struct platform_device *pdev)
246 {
247 struct gr2d *gr2d = platform_get_drvdata(pdev);
248 int err;
249
250 err = host1x_client_unregister(&gr2d->client.base);
251 if (err < 0) {
252 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
253 err);
254 return err;
255 }
256
257 clk_disable_unprepare(gr2d->clk);
258
259 return 0;
260 }
261
262 struct platform_driver tegra_gr2d_driver = {
263 .driver = {
264 .name = "tegra-gr2d",
265 .of_match_table = gr2d_match,
266 },
267 .probe = gr2d_probe,
268 .remove = gr2d_remove,
269 };
270