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 29 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client) 30 { 31 return container_of(client, struct gr2d, client); 32 } 33 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 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 }; 99 100 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 } 111 112 static void gr2d_close_channel(struct tegra_drm_context *context) 113 { 114 host1x_channel_put(context->channel); 115 } 116 117 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 } 141 142 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 }; 187 188 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 } 244 245 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