1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2017 Linaro Ltd. 4 */ 5 6 #include <linux/device.h> 7 #include <linux/firmware.h> 8 #include <linux/kernel.h> 9 #include <linux/iommu.h> 10 #include <linux/io.h> 11 #include <linux/of.h> 12 #include <linux/of_address.h> 13 #include <linux/platform_device.h> 14 #include <linux/of_device.h> 15 #include <linux/qcom_scm.h> 16 #include <linux/sizes.h> 17 #include <linux/soc/qcom/mdt_loader.h> 18 19 #include "core.h" 20 #include "firmware.h" 21 #include "hfi_venus_io.h" 22 23 #define VENUS_PAS_ID 9 24 #define VENUS_FW_MEM_SIZE (6 * SZ_1M) 25 #define VENUS_FW_START_ADDR 0x0 26 27 static void venus_reset_cpu(struct venus_core *core) 28 { 29 u32 fw_size = core->fw.mapped_mem_size; 30 void __iomem *base = core->base; 31 32 writel(0, base + WRAPPER_FW_START_ADDR); 33 writel(fw_size, base + WRAPPER_FW_END_ADDR); 34 writel(0, base + WRAPPER_CPA_START_ADDR); 35 writel(fw_size, base + WRAPPER_CPA_END_ADDR); 36 writel(fw_size, base + WRAPPER_NONPIX_START_ADDR); 37 writel(fw_size, base + WRAPPER_NONPIX_END_ADDR); 38 writel(0x0, base + WRAPPER_CPU_CGC_DIS); 39 writel(0x0, base + WRAPPER_CPU_CLOCK_CONFIG); 40 41 /* Bring ARM9 out of reset */ 42 writel(0, base + WRAPPER_A9SS_SW_RESET); 43 } 44 45 int venus_set_hw_state(struct venus_core *core, bool resume) 46 { 47 int ret; 48 49 if (core->use_tz) { 50 ret = qcom_scm_set_remote_state(resume, 0); 51 if (resume && ret == -EINVAL) 52 ret = 0; 53 return ret; 54 } 55 56 if (resume) 57 venus_reset_cpu(core); 58 else 59 writel(1, core->base + WRAPPER_A9SS_SW_RESET); 60 61 return 0; 62 } 63 64 static int venus_load_fw(struct venus_core *core, const char *fwname, 65 phys_addr_t *mem_phys, size_t *mem_size) 66 { 67 const struct firmware *mdt; 68 struct device_node *node; 69 struct device *dev; 70 struct resource r; 71 ssize_t fw_size; 72 void *mem_va; 73 int ret; 74 75 *mem_phys = 0; 76 *mem_size = 0; 77 78 dev = core->dev; 79 node = of_parse_phandle(dev->of_node, "memory-region", 0); 80 if (!node) { 81 dev_err(dev, "no memory-region specified\n"); 82 return -EINVAL; 83 } 84 85 ret = of_address_to_resource(node, 0, &r); 86 if (ret) 87 goto err_put_node; 88 89 ret = request_firmware(&mdt, fwname, dev); 90 if (ret < 0) 91 goto err_put_node; 92 93 fw_size = qcom_mdt_get_size(mdt); 94 if (fw_size < 0) { 95 ret = fw_size; 96 goto err_release_fw; 97 } 98 99 *mem_phys = r.start; 100 *mem_size = resource_size(&r); 101 102 if (*mem_size < fw_size || fw_size > VENUS_FW_MEM_SIZE) { 103 ret = -EINVAL; 104 goto err_release_fw; 105 } 106 107 mem_va = memremap(r.start, *mem_size, MEMREMAP_WC); 108 if (!mem_va) { 109 dev_err(dev, "unable to map memory region: %pR\n", &r); 110 ret = -ENOMEM; 111 goto err_release_fw; 112 } 113 114 if (core->use_tz) 115 ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, 116 mem_va, *mem_phys, *mem_size, NULL); 117 else 118 ret = qcom_mdt_load_no_init(dev, mdt, fwname, VENUS_PAS_ID, 119 mem_va, *mem_phys, *mem_size, NULL); 120 121 memunmap(mem_va); 122 err_release_fw: 123 release_firmware(mdt); 124 err_put_node: 125 of_node_put(node); 126 return ret; 127 } 128 129 static int venus_boot_no_tz(struct venus_core *core, phys_addr_t mem_phys, 130 size_t mem_size) 131 { 132 struct iommu_domain *iommu; 133 struct device *dev; 134 int ret; 135 136 dev = core->fw.dev; 137 if (!dev) 138 return -EPROBE_DEFER; 139 140 iommu = core->fw.iommu_domain; 141 core->fw.mapped_mem_size = mem_size; 142 143 ret = iommu_map(iommu, VENUS_FW_START_ADDR, mem_phys, mem_size, 144 IOMMU_READ | IOMMU_WRITE | IOMMU_PRIV); 145 if (ret) { 146 dev_err(dev, "could not map video firmware region\n"); 147 return ret; 148 } 149 150 venus_reset_cpu(core); 151 152 return 0; 153 } 154 155 static int venus_shutdown_no_tz(struct venus_core *core) 156 { 157 const size_t mapped = core->fw.mapped_mem_size; 158 struct iommu_domain *iommu; 159 size_t unmapped; 160 u32 reg; 161 struct device *dev = core->fw.dev; 162 void __iomem *base = core->base; 163 164 /* Assert the reset to ARM9 */ 165 reg = readl_relaxed(base + WRAPPER_A9SS_SW_RESET); 166 reg |= WRAPPER_A9SS_SW_RESET_BIT; 167 writel_relaxed(reg, base + WRAPPER_A9SS_SW_RESET); 168 169 /* Make sure reset is asserted before the mapping is removed */ 170 mb(); 171 172 iommu = core->fw.iommu_domain; 173 174 unmapped = iommu_unmap(iommu, VENUS_FW_START_ADDR, mapped); 175 if (unmapped != mapped) 176 dev_err(dev, "failed to unmap firmware\n"); 177 178 return 0; 179 } 180 181 int venus_boot(struct venus_core *core) 182 { 183 struct device *dev = core->dev; 184 phys_addr_t mem_phys; 185 size_t mem_size; 186 int ret; 187 188 if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) || 189 (core->use_tz && !qcom_scm_is_available())) 190 return -EPROBE_DEFER; 191 192 ret = venus_load_fw(core, core->res->fwname, &mem_phys, &mem_size); 193 if (ret) { 194 dev_err(dev, "fail to load video firmware\n"); 195 return -EINVAL; 196 } 197 198 if (core->use_tz) 199 ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID); 200 else 201 ret = venus_boot_no_tz(core, mem_phys, mem_size); 202 203 return ret; 204 } 205 206 int venus_shutdown(struct venus_core *core) 207 { 208 int ret; 209 210 if (core->use_tz) 211 ret = qcom_scm_pas_shutdown(VENUS_PAS_ID); 212 else 213 ret = venus_shutdown_no_tz(core); 214 215 return ret; 216 } 217 218 int venus_firmware_init(struct venus_core *core) 219 { 220 struct platform_device_info info; 221 struct iommu_domain *iommu_dom; 222 struct platform_device *pdev; 223 struct device_node *np; 224 int ret; 225 226 np = of_get_child_by_name(core->dev->of_node, "video-firmware"); 227 if (!np) { 228 core->use_tz = true; 229 return 0; 230 } 231 232 memset(&info, 0, sizeof(info)); 233 info.fwnode = &np->fwnode; 234 info.parent = core->dev; 235 info.name = np->name; 236 info.dma_mask = DMA_BIT_MASK(32); 237 238 pdev = platform_device_register_full(&info); 239 if (IS_ERR(pdev)) { 240 of_node_put(np); 241 return PTR_ERR(pdev); 242 } 243 244 pdev->dev.of_node = np; 245 246 ret = of_dma_configure(&pdev->dev, np, true); 247 if (ret) { 248 dev_err(core->dev, "dma configure fail\n"); 249 goto err_unregister; 250 } 251 252 core->fw.dev = &pdev->dev; 253 254 iommu_dom = iommu_domain_alloc(&platform_bus_type); 255 if (!iommu_dom) { 256 dev_err(core->fw.dev, "Failed to allocate iommu domain\n"); 257 ret = -ENOMEM; 258 goto err_unregister; 259 } 260 261 ret = iommu_attach_device(iommu_dom, core->fw.dev); 262 if (ret) { 263 dev_err(core->fw.dev, "could not attach device\n"); 264 goto err_iommu_free; 265 } 266 267 core->fw.iommu_domain = iommu_dom; 268 269 of_node_put(np); 270 271 return 0; 272 273 err_iommu_free: 274 iommu_domain_free(iommu_dom); 275 err_unregister: 276 platform_device_unregister(pdev); 277 of_node_put(np); 278 return ret; 279 } 280 281 void venus_firmware_deinit(struct venus_core *core) 282 { 283 struct iommu_domain *iommu; 284 285 if (!core->fw.dev) 286 return; 287 288 iommu = core->fw.iommu_domain; 289 290 iommu_detach_device(iommu, core->fw.dev); 291 iommu_domain_free(iommu); 292 293 platform_device_unregister(to_platform_device(core->fw.dev)); 294 } 295