// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*
* Copyright (c) 2014 The Linux Foundation. All rights reserved.
*/
#include <linux/ascii85.h>
#include <linux/interconnect.h>
#include <linux/qcom_scm.h>
#include <linux/kernel.h>
#include <linux/of_address.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#include <linux/soc/qcom/mdt_loader.h>
#include "adreno_gpu.h"
#include "msm_gem.h"
#include "msm_mmu.h"
static bool zap_available = true;
static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname,
u32 pasid)
{
struct device *dev = &gpu->pdev->dev;
const struct firmware *fw;
struct device_node *np, *mem_np;
struct resource r;
phys_addr_t mem_phys;
ssize_t mem_size;
void *mem_region = NULL;
int ret;
if (!IS_ENABLED(CONFIG_ARCH_QCOM)) {
zap_available = false;
return -EINVAL;
}
np = of_get_child_by_name(dev->of_node, "zap-shader");
if (!np) {
zap_available = false;
return -ENODEV;
}
mem_np = of_parse_phandle(np, "memory-region", 0);
of_node_put(np);
if (!mem_np) {
zap_available = false;
return -EINVAL;
}
ret = of_address_to_resource(mem_np, 0, &r);
of_node_put(mem_np);
if (ret)
return ret;
mem_phys = r.start;
/* Request the MDT file for the firmware */
fw = adreno_request_fw(to_adreno_gpu(gpu), fwname);
if (IS_ERR(fw)) {
DRM_DEV_ERROR(dev, "Unable to load %s\n", fwname);
return PTR_ERR(fw);
}
/* Figure out how much memory we need */
mem_size = qcom_mdt_get_size(fw);
if (mem_size < 0) {
ret = mem_size;
goto out;
}
if (mem_size > resource_size(&r)) {
DRM_DEV_ERROR(dev,
"memory region is too small to load the MDT\n");
ret = -E2BIG;
goto out;
}
/* Allocate memory for the firmware image */
mem_region = memremap(mem_phys, mem_size, MEMREMAP_WC);
if (!mem_region) {
ret = -ENOMEM;
goto out;
}
/*
* Load the rest of the MDT
*
* Note that we could be dealing with two different paths, since
* with upstream linux-firmware it would be in a qcom/ subdir..
* adreno_request_fw() handles this, but qcom_mdt_load() does
* not. But since we've already gotten through adreno_request_fw()
* we know which of the two cases it is:
*/
if (to_adreno_gpu(gpu)->fwloc == FW_LOCATION_LEGACY) {
ret = qcom_mdt_load(dev, fw, fwname, pasid,
mem_region, mem_phys, mem_size, NULL);
} else {
char *newname;
newname = kasprintf(GFP_KERNEL, "qcom/%s", fwname);
ret = qcom_mdt_load(dev, fw, newname, pasid,
mem_region, mem_phys, mem_size, NULL);
kfree(newname);
}
if (ret)
goto out;
/* Send the image to the secure world */
ret = qcom_scm_pas_auth_and_reset(pasid);
/*
* If the scm call returns -EOPNOTSUPP we assume that this target
* doesn't need/support the zap shader so quietly fail
*/
if (ret == -EOPNOTSUPP)
zap_available = false;
else if (ret)
DRM_DEV_ERROR(dev, "Unable to authorize the image\n");
out:
if (mem_region)
memunmap(mem_region);
release_firmware(fw);
return ret;
}
int adreno_zap_shader_load(struct msm_gpu *gpu, u32 pasid)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
struct platform_device *pdev = gpu->pdev;
/* Short cut if we determine the zap shader isn't available/needed */
if (!zap_available)
return -ENODEV;
/* We need SCM to be able to load the firmware */
if (!qcom_scm_is_available()) {
DRM_DEV_ERROR(&pdev->dev, "SCM is not available\n");
return -EPROBE_DEFER;
}
/* Each GPU has a target specific zap shader firmware name to use */
if (!adreno_gpu->info->zapfw) {
zap_available = false;
DRM_DEV_ERROR(&pdev->dev,
"Zap shader firmware file not specified for this target\n");
return -ENODEV;
}
return zap_shader_load_mdt(gpu, adreno_gpu->info->zapfw, pasid);
}
int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
switch (param) {
case MSM_PARAM_GPU_ID:
*value = adreno_gpu->