summaryrefslogtreecommitdiff
path: root/drivers/media/platform/qcom/venus/firmware.c
blob: d03e2dd5808cde8a2b4ffbe2db8e5da512f6ddba (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2017 Linaro Ltd.
 */

#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/kernel.h>
#include <linux/iommu.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/qcom_scm.h>
#include <linux/sizes.h>
#include <linux/soc/qcom/mdt_loader.h>

#include "core.h"
#include "firmware.h"
#include "hfi_venus_io.h"

#define VENUS_PAS_ID			9
#define VENUS_FW_MEM_SIZE		(6 * SZ_1M)
#define VENUS_FW_START_ADDR		0x0

static void venus_reset_cpu(struct venus_core *core)
{
	u32 fw_size = core->fw.mapped_mem_size;
	void __iomem *base = core->base;

	writel(0, base + WRAPPER_FW_START_ADDR);
	writel(fw_size, base + WRAPPER_FW_END_ADDR);
	writel(0, base + WRAPPER_CPA_START_ADDR);
	writel(fw_size, base + WRAPPER_CPA_END_ADDR);
	writel(fw_size, base + WRAPPER_NONPIX_START_ADDR);
	writel(fw_size, base + WRAPPER_NONPIX_END_ADDR);
	writel(0x0, base + WRAPPER_CPU_CGC_DIS);
	writel(0x0, base + WRAPPER_CPU_CLOCK_CONFIG);

	/* Bring ARM9 out of reset */
	writel(0, base + WRAPPER_A9SS_SW_RESET);
}

int venus_set_hw_state(struct venus_core *core, bool resume)
{
	int ret;

	if (core->use_tz) {
		ret = qcom_scm_set_remote_state(resume, 0);
		if (resume && ret == -EINVAL)
			ret = 0;
		return ret;
	}

	if (resume)
		venus_reset_cpu(core);
	else
		writel(1, core->base + WRAPPER_A9SS_SW_RESET);

	return 0;
}

static int venus_load_fw(struct venus_core *core, const char *fwname,
			 phys_addr_t *mem_phys, size_t *mem_size)
{
	const struct firmware *mdt;
	struct device_node *node;
	struct device *dev;
	struct resource r;
	ssize_t fw_size;
	void *mem_va;
	int ret;

	*mem_phys = 0;
	*mem_size = 0;

	dev = core->dev;
	node = of_parse_phandle(dev->of_node, "memory-region", 0);
	if (!node) {
		dev_err(dev, "no memory-region specified\n");
		return -EINVAL;
	}

	ret = of_address_to_resource(node, 0, &r);
	if (ret)
		goto err_put_node;

	ret = request_firmware(&mdt, fwname, dev);
	if (ret < 0)
		goto err_put_node;

	fw_size = qcom_mdt_get_size(mdt);
	if (fw_size < 0) {
		ret = fw_size;
		goto err_release_fw;
	}

	*mem_phys = r.start;
	*mem_size = resource_size(&r);

	if (*mem_size < fw_size || fw_size > VENUS_FW_MEM_SIZE) {
		ret = -EINVAL;
		goto err_release_fw;
	}

	mem_va = memremap(r.start, *mem_size, MEMREMAP_WC);
	if (!mem_va) {
		dev_err(dev, "unable to map memory region: %pR\n", &r);
		ret = -ENOMEM;
		goto err_release_fw;
	}

	if (core->use_tz)
		ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID,
				    mem_va, *mem_phys, *mem_size, NULL);
	else
		ret = qcom_mdt_load_no_init(dev, mdt, fwname, VENUS_PAS_ID,
					    mem_va, *mem_phys, *mem_size, NULL);

	memunmap(mem_va);
err_release_fw:
	release_firmware(mdt);
err_put_node:
	of_node_put(node);
	return ret;
}

static int venus_boot_no_tz(struct venus_core *core, phys_addr_t mem_phys,
			    size_t mem_size)
{
	struct iommu_domain *iommu;
	struct device *dev;
	int ret;

	dev = core->fw.dev;
	if (!dev)
		return -EPROBE_DEFER;

	iommu = core->fw.iommu_domain;
	core->fw.mapped_mem_size = mem_size;

	ret = iommu_map(iommu, VENUS_FW_START_ADDR, mem_phys, mem_size,
			IOMMU_READ | IOMMU_WRITE | IOMMU_PRIV);
	if (ret) {
		dev_err(dev, "could not map video firmware region\n");
		return ret;
	}

	venus_reset_cpu(core);

	return 0;
}

static int venus_shutdown_no_tz(struct venus_core *core)
{
	const size_t mapped = core->fw.mapped_mem_size;
	struct iommu_domain *iommu;
	size_t unmapped;
	u32 reg;
	struct device *dev = core->fw.dev;
	void __iomem *base = core->base;

	/* Assert the reset to ARM9 */
	reg = readl_relaxed(base + WRAPPER_A9SS_SW_RESET);
	reg |= WRAPPER_A9SS_SW_RESET_BIT;
	writel_relaxed(reg, base + WRAPPER_A9SS_SW_RESET);

	/* Make sure reset is asserted before the mapping is removed */
	mb();

	iommu = core->fw.iommu_domain;

	if (core->fw.mapped_mem_size && iommu) {
		unmapped = iommu_unmap(iommu, VENUS_FW_START_ADDR, mapped);

		if (unmapped != mapped)
			dev_err(dev, "failed to unmap firmware\n");
		else
			core->fw.mapped_mem_size = 0;
	}

	return 0;
}

int venus_boot(struct venus_core *core)
{
	struct device *dev = core->dev;
	const struct venus_resources *res = core->res;
	phys_addr_t mem_phys;
	size_t mem_size;
	int ret;

	if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) ||
	    (core->use_tz && !qcom_scm_is_available()))
		return -EPROBE_DEFER;

	ret = venus_load_fw(core, core->res->fwname, &mem_phys, &mem_size);
	if (ret) {
		dev_err(dev, "fail to load video firmware\n");
		return -EINVAL;
	}

	if (core->use_tz)
		ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
	else
		ret = venus_boot_no_tz(core, mem_phys, mem_size);

	if (ret)
		return ret;

	if (core->use_tz && res->cp_size) {
		ret = qcom_scm_mem_protect_video_var(res->cp_start,
						     res->cp_size,
						     res->cp_nonpixel_start,
						     res->cp_nonpixel_size);
		if (ret) {
			qcom_scm_pas_shutdown(VENUS_PAS_ID);
			dev_err(dev, "set virtual address ranges fail (%d)\n",
				ret);
			return ret;
		}
	}

	return 0;
}

int venus_shutdown(struct venus_core *core)
{
	int ret;

	if (core->use_tz)
		ret = qcom_scm_pas_shutdown(VENUS_PAS_ID);
	else
		ret = venus_shutdown_no_tz(core);

	return ret;
}

int venus_firmware_init(struct venus_core *core)
{
	struct platform_device_info info;
	struct iommu_domain *iommu_dom;
	struct platform_device *pdev;
	struct device_node *np;
	int ret;

	np = of_get_child_by_name(core->dev->of_node, "video-firmware");
	if (!np) {
		core->use_tz = true;
		return 0;
	}

	memset(&info, 0, sizeof(info));
	info.fwnode = &np->fwnode;
	info.parent = core->dev;
	info.name = np->name;
	info.dma_mask = DMA_BIT_MASK(32);

	pdev = platform_device_register_full(&info);
	if (IS_ERR(pdev)) {
		of_node_put(np);
		return PTR_ERR(pdev);
	}

	pdev->dev.of_node = np;

	ret = of_dma_configure(&pdev->dev, np, true);
	if (ret) {
		dev_err(core->dev, "dma configure fail\n");
		goto err_unregister;
	}

	core->fw.dev = &pdev->dev;

	iommu_dom = iommu_domain_alloc(&platform_bus_type);
	if (!iommu_dom) {
		dev_err(core->fw.dev, "Failed to allocate iommu domain\n");
		ret = -ENOMEM;
		goto err_unregister;
	}

	ret = iommu_attach_device(iommu_dom, core->fw.dev);
	if (ret) {
		dev_err(core->fw.dev, "could not attach device\n");
		goto err_iommu_free;
	}

	core->fw.iommu_domain = iommu_dom;

	of_node_put(np);

	return 0;

err_iommu_free:
	iommu_domain_free(iommu_dom);
err_unregister:
	platform_device_unregister(pdev);
	of_node_put(np);
	return ret;
}

void venus_firmware_deinit(struct venus_core *core)
{
	struct iommu_domain *iommu;

	if (!core->fw.dev)
		return;

	iommu = core->fw.iommu_domain;

	iommu_detach_device(iommu, core->fw.dev);

	if (core->fw.iommu_domain) {
		iommu_domain_free(iommu);
		core->fw.iommu_domain = NULL;
	}

	platform_device_unregister(to_platform_device(core->fw.dev));
}