1 /* 2 * Copyright (c) 2012-2013, NVIDIA Corporation. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #include <linux/clk.h> 10 #include <linux/iommu.h> 11 #include <linux/of_device.h> 12 13 #include "drm.h" 14 #include "gem.h" 15 #include "gr2d.h" 16 17 struct gr2d_soc { 18 unsigned int version; 19 }; 20 21 struct gr2d { 22 struct iommu_group *group; 23 struct tegra_drm_client client; 24 struct host1x_channel *channel; 25 struct clk *clk; 26 27 const struct gr2d_soc *soc; 28 29 DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS); 30 }; 31 32 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client) 33 { 34 return container_of(client, struct gr2d, client); 35 } 36 37 static int gr2d_init(struct host1x_client *client) 38 { 39 struct tegra_drm_client *drm = host1x_to_drm_client(client); 40 struct drm_device *dev = dev_get_drvdata(client->parent); 41 unsigned long flags = HOST1X_SYNCPT_HAS_BASE; 42 struct gr2d *gr2d = to_gr2d(drm); 43 int err; 44 45 gr2d->channel = host1x_channel_request(client->dev); 46 if (!gr2d->channel) 47 return -ENOMEM; 48 49 client->syncpts[0] = host1x_syncpt_request(client, flags); 50 if (!client->syncpts[0]) { 51 err = -ENOMEM; 52 dev_err(client->dev, "failed to request syncpoint: %d\n", err); 53 goto put; 54 } 55 56 gr2d->group = host1x_client_iommu_attach(client, false); 57 if (IS_ERR(gr2d->group)) { 58 err = PTR_ERR(gr2d->group); 59 dev_err(client->dev, "failed to attach to domain: %d\n", err); 60 goto free; 61 } 62 63 err = tegra_drm_register_client(dev->dev_private, drm); 64 if (err < 0) { 65 dev_err(client->dev, "failed to register client: %d\n", err); 66 goto detach; 67 } 68 69 return 0; 70 71 detach: 72 host1x_client_iommu_detach(client, gr2d->group); 73 free: 74 host1x_syncpt_free(client->syncpts[0]); 75 put: 76 host1x_channel_put(gr2d->channel); 77 return err; 78 } 79 80 static int gr2d_exit(struct host1x_client *client) 81 { 82 struct tegra_drm_client *drm = host1x_to_drm_client(client); 83 struct drm_device *dev = dev_get_drvdata(client->parent); 84 struct tegra_drm *tegra = dev->dev_private; 85 struct gr2d *gr2d = to_gr2d(drm); 86 int err; 87 88 err = tegra_drm_unregister_client(tegra, drm); 89 if (err < 0) 90 return err; 91 92 host1x_client_iommu_detach(client, gr2d->group); 93 host1x_syncpt_free(client->syncpts[0]); 94 host1x_channel_put(gr2d->channel); 95 96 return 0; 97 } 98 99 static const struct host1x_client_ops gr2d_client_ops = { 100 .init = gr2d_init, 101 .exit = gr2d_exit, 102 }; 103 104 static int gr2d_open_channel(struct tegra_drm_client *client, 105 struct tegra_drm_context *context) 106 { 107 struct gr2d *gr2d = to_gr2d(client); 108 109 context->channel = host1x_channel_get(gr2d->channel); 110 if (!context->channel) 111 return -ENOMEM; 112 113 return 0; 114 } 115 116 static void gr2d_close_channel(struct tegra_drm_context *context) 117 { 118 host1x_channel_put(context->channel); 119 } 120 121 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset) 122 { 123 struct gr2d *gr2d = dev_get_drvdata(dev); 124 125 switch (class) { 126 case HOST1X_CLASS_HOST1X: 127 if (offset == 0x2b) 128 return 1; 129 130 break; 131 132 case HOST1X_CLASS_GR2D: 133 case HOST1X_CLASS_GR2D_SB: 134 if (offset >= GR2D_NUM_REGS) 135 break; 136 137 if (test_bit(offset, gr2d->addr_regs)) 138 return 1; 139 140 break; 141 } 142 143 return 0; 144 } 145 146 static int gr2d_is_valid_class(u32 class) 147 { 148 return (class == HOST1X_CLASS_GR2D || 149 class == HOST1X_CLASS_GR2D_SB); 150 } 151 152 static const struct tegra_drm_client_ops gr2d_ops = { 153 .open_channel = gr2d_open_channel, 154 .close_channel = gr2d_close_channel, 155 .is_addr_reg = gr2d_is_addr_reg, 156 .is_valid_class = gr2d_is_valid_class, 157 .submit = tegra_drm_submit, 158 }; 159 160 static const struct gr2d_soc tegra20_gr2d_soc = { 161 .version = 0x20, 162 }; 163 164 static const struct gr2d_soc tegra30_gr2d_soc = { 165 .version = 0x30, 166 }; 167 168 static const struct of_device_id gr2d_match[] = { 169 { .compatible = "nvidia,tegra30-gr2d", .data = &tegra20_gr2d_soc }, 170 { .compatible = "nvidia,tegra20-gr2d", .data = &tegra30_gr2d_soc }, 171 { }, 172 }; 173 MODULE_DEVICE_TABLE(of, gr2d_match); 174 175 static const u32 gr2d_addr_regs[] = { 176 GR2D_UA_BASE_ADDR, 177 GR2D_VA_BASE_ADDR, 178 GR2D_PAT_BASE_ADDR, 179 GR2D_DSTA_BASE_ADDR, 180 GR2D_DSTB_BASE_ADDR, 181 GR2D_DSTC_BASE_ADDR, 182 GR2D_SRCA_BASE_ADDR, 183 GR2D_SRCB_BASE_ADDR, 184 GR2D_SRC_BASE_ADDR_SB, 185 GR2D_DSTA_BASE_ADDR_SB, 186 GR2D_DSTB_BASE_ADDR_SB, 187 GR2D_UA_BASE_ADDR_SB, 188 GR2D_VA_BASE_ADDR_SB, 189 }; 190 191 static int gr2d_probe(struct platform_device *pdev) 192 { 193 struct device *dev = &pdev->dev; 194 struct host1x_syncpt **syncpts; 195 struct gr2d *gr2d; 196 unsigned int i; 197 int err; 198 199 gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL); 200 if (!gr2d) 201 return -ENOMEM; 202 203 gr2d->soc = of_device_get_match_data(dev); 204 205 syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL); 206 if (!syncpts) 207 return -ENOMEM; 208 209 gr2d->clk = devm_clk_get(dev, NULL); 210 if (IS_ERR(gr2d->clk)) { 211 dev_err(dev, "cannot get clock\n"); 212 return PTR_ERR(gr2d->clk); 213 } 214 215 err = clk_prepare_enable(gr2d->clk); 216 if (err) { 217 dev_err(dev, "cannot turn on clock\n"); 218 return err; 219 } 220 221 INIT_LIST_HEAD(&gr2d->client.base.list); 222 gr2d->client.base.ops = &gr2d_client_ops; 223 gr2d->client.base.dev = dev; 224 gr2d->client.base.class = HOST1X_CLASS_GR2D; 225 gr2d->client.base.syncpts = syncpts; 226 gr2d->client.base.num_syncpts = 1; 227 228 INIT_LIST_HEAD(&gr2d->client.list); 229 gr2d->client.version = gr2d->soc->version; 230 gr2d->client.ops = &gr2d_ops; 231 232 err = host1x_client_register(&gr2d->client.base); 233 if (err < 0) { 234 dev_err(dev, "failed to register host1x client: %d\n", err); 235 clk_disable_unprepare(gr2d->clk); 236 return err; 237 } 238 239 /* initialize address register map */ 240 for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++) 241 set_bit(gr2d_addr_regs[i], gr2d->addr_regs); 242 243 platform_set_drvdata(pdev, gr2d); 244 245 return 0; 246 } 247 248 static int gr2d_remove(struct platform_device *pdev) 249 { 250 struct gr2d *gr2d = platform_get_drvdata(pdev); 251 int err; 252 253 err = host1x_client_unregister(&gr2d->client.base); 254 if (err < 0) { 255 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", 256 err); 257 return err; 258 } 259 260 clk_disable_unprepare(gr2d->clk); 261 262 return 0; 263 } 264 265 struct platform_driver tegra_gr2d_driver = { 266 .driver = { 267 .name = "tegra-gr2d", 268 .of_match_table = gr2d_match, 269 }, 270 .probe = gr2d_probe, 271 .remove = gr2d_remove, 272 }; 273