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