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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
27static 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
42 writel(0, base + WRAPPER_A9SS_SW_RESET);
43}
44
45int 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
64static 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);
122err_release_fw:
123 release_firmware(mdt);
124err_put_node:
125 of_node_put(node);
126 return ret;
127}
128
129static 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
155static 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
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
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
181int venus_boot(struct venus_core *core)
182{
183 struct device *dev = core->dev;
184 const struct venus_resources *res = core->res;
185 phys_addr_t mem_phys;
186 size_t mem_size;
187 int ret;
188
189 if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) ||
190 (core->use_tz && !qcom_scm_is_available()))
191 return -EPROBE_DEFER;
192
193 ret = venus_load_fw(core, core->res->fwname, &mem_phys, &mem_size);
194 if (ret) {
195 dev_err(dev, "fail to load video firmware\n");
196 return -EINVAL;
197 }
198
199 if (core->use_tz)
200 ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
201 else
202 ret = venus_boot_no_tz(core, mem_phys, mem_size);
203
204 if (ret)
205 return ret;
206
207 if (core->use_tz && res->cp_size) {
208 ret = qcom_scm_mem_protect_video_var(res->cp_start,
209 res->cp_size,
210 res->cp_nonpixel_start,
211 res->cp_nonpixel_size);
212 if (ret) {
213 qcom_scm_pas_shutdown(VENUS_PAS_ID);
214 dev_err(dev, "set virtual address ranges fail (%d)\n",
215 ret);
216 return ret;
217 }
218 }
219
220 return 0;
221}
222
223int venus_shutdown(struct venus_core *core)
224{
225 int ret;
226
227 if (core->use_tz)
228 ret = qcom_scm_pas_shutdown(VENUS_PAS_ID);
229 else
230 ret = venus_shutdown_no_tz(core);
231
232 return ret;
233}
234
235int venus_firmware_init(struct venus_core *core)
236{
237 struct platform_device_info info;
238 struct iommu_domain *iommu_dom;
239 struct platform_device *pdev;
240 struct device_node *np;
241 int ret;
242
243 np = of_get_child_by_name(core->dev->of_node, "video-firmware");
244 if (!np) {
245 core->use_tz = true;
246 return 0;
247 }
248
249 memset(&info, 0, sizeof(info));
250 info.fwnode = &np->fwnode;
251 info.parent = core->dev;
252 info.name = np->name;
253 info.dma_mask = DMA_BIT_MASK(32);
254
255 pdev = platform_device_register_full(&info);
256 if (IS_ERR(pdev)) {
257 of_node_put(np);
258 return PTR_ERR(pdev);
259 }
260
261 pdev->dev.of_node = np;
262
263 ret = of_dma_configure(&pdev->dev, np, true);
264 if (ret) {
265 dev_err(core->dev, "dma configure fail\n");
266 goto err_unregister;
267 }
268
269 core->fw.dev = &pdev->dev;
270
271 iommu_dom = iommu_domain_alloc(&platform_bus_type);
272 if (!iommu_dom) {
273 dev_err(core->fw.dev, "Failed to allocate iommu domain\n");
274 ret = -ENOMEM;
275 goto err_unregister;
276 }
277
278 ret = iommu_attach_device(iommu_dom, core->fw.dev);
279 if (ret) {
280 dev_err(core->fw.dev, "could not attach device\n");
281 goto err_iommu_free;
282 }
283
284 core->fw.iommu_domain = iommu_dom;
285
286 of_node_put(np);
287
288 return 0;
289
290err_iommu_free:
291 iommu_domain_free(iommu_dom);
292err_unregister:
293 platform_device_unregister(pdev);
294 of_node_put(np);
295 return ret;
296}
297
298void venus_firmware_deinit(struct venus_core *core)
299{
300 struct iommu_domain *iommu;
301
302 if (!core->fw.dev)
303 return;
304
305 iommu = core->fw.iommu_domain;
306
307 iommu_detach_device(iommu, core->fw.dev);
308 iommu_domain_free(iommu);
309
310 platform_device_unregister(to_platform_device(core->fw.dev));
311}
312
