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/* Copyright (c) 2016-2017 The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/types.h>
#include <linux/debugfs.h>
#include <drm/drm_print.h>
#include "a5xx_gpu.h"
static int pfp_print(struct msm_gpu *gpu, struct drm_printer *p)
{
int i;
drm_printf(p, "PFP state:\n");
for (i = 0; i < 36; i++) {
gpu_write(gpu, REG_A5XX_CP_PFP_STAT_ADDR, i);
drm_printf(p, " %02x: %08x\n", i,
gpu_read(gpu, REG_A5XX_CP_PFP_STAT_DATA));
}
return 0;
}
static int me_print(struct msm_gpu *gpu, struct drm_printer *p)
{
int i;
drm_printf(p, "ME state:\n");
for (i = 0; i < 29; i++) {
gpu_write(gpu, REG_A5XX_CP_ME_STAT_ADDR, i);
drm_printf(p, " %02x: %08x\n", i,
gpu_read(gpu, REG_A5XX_CP_ME_STAT_DATA));
}
return 0;
}
static int meq_print(struct msm_gpu *gpu, struct drm_printer *p)
{
int i;
drm_printf(p, "MEQ state:\n");
gpu_write(gpu, REG_A5XX_CP_MEQ_DBG_ADDR, 0);
for (i = 0; i < 64; i++) {
drm_printf(p, " %02x: %08x\n", i,
gpu_read(gpu, REG_A5XX_CP_MEQ_DBG_DATA));
}
return 0;
}
static int roq_print(struct msm_gpu *gpu, struct drm_printer *p)
{
int i;
drm_printf(p, "ROQ state:\n");
gpu_write(gpu, REG_A5XX_CP_ROQ_DBG_ADDR, 0);
for (i = 0; i < 512 / 4; i++) {
uint32_t val[4];
int j;
for (j = 0; j < 4; j++)
val[j] = gpu_read(gpu, REG_A5XX_CP_ROQ_DBG_DATA);
drm_printf(p, " %02x: %08x %08x %08x %08x\n", i,
val[0], val[1], val[2], val[3]);
}
return 0;
}
static int show(struct seq_file *m, void *arg)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
struct msm_drm_private *priv = dev->dev_private;
struct drm_printer p = drm_seq_file_printer(m);
int (*show)(struct msm_gpu *gpu, struct drm_printer *p) =
node->info_ent->data;
return show(priv->gpu, &p);
}
#define ENT(n) { .name = #n, .show = show, .data = n ##_print }
static struct drm_info_list a5xx_debugfs_list[] = {
ENT(pfp),
ENT(me),
ENT(meq),
ENT(roq),
};
/* for debugfs files that can be written to, we can't use drm helper: */
static int
reset_set(void *data, u64 val)
{
struct drm_device *dev = data;
struct msm_drm_private *priv = dev->dev_private;
struct msm_gpu *gpu = priv->gpu;
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
if (!capable(CAP_SYS_ADMIN))
return -EINVAL;
/* TODO do we care about trying to make sure the GPU is idle?
* Since this is just a debug feature limited to CAP_SYS_ADMIN,
* maybe it is fine to let the user keep both pieces if they
* try to reset an active GPU.
*/
mutex_lock(&dev->struct_mutex);
release_firmware(adreno_gpu->fw[ADRENO_FW_PM4]);
adreno_gpu->fw[ADRENO_FW_PM4] = NULL;
release_firmware(adreno_gpu->fw[ADRENO_FW_PFP]);
adreno_gpu->fw[ADRENO_FW_PFP] = NULL;
if (a5xx_gpu->pm4_bo) {
if (a5xx_gpu->pm4_iova)
msm_gem_put_iova(a5xx_gpu->pm4_bo, gpu->aspace);
drm_gem_object_unreference(a5xx_gpu->pm4_bo);
a5xx_gpu->pm4_bo = NULL;
}
if (a5xx_gpu->pfp_bo) {
if (a5xx_gpu->pfp_iova)
msm_gem_put_iova(a5xx_gpu->pfp_bo, gpu->aspace);
drm_gem_object_unreference(a5xx_gpu->pfp_bo);
a5xx_gpu->pfp_bo = NULL;
}
gpu->needs_hw_init = true;
pm_runtime_get_sync(&gpu->pdev->dev);
gpu->funcs->recover(gpu);
pm_runtime_put_sync(&gpu->pdev->dev);
mutex_unlock(&dev->struct_mutex);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(reset_fops, NULL, reset_set, "%llx\n");
int a5xx_debugfs_init(struct msm_gpu *gpu, struct drm_minor *minor)
{
struct drm_device *dev;
struct dentry *ent;
int ret;
if (!minor)
return 0;
dev = minor->dev;
ret = drm_debugfs_create_files(a5xx_debugfs_list,
ARRAY_SIZE(a5xx_debugfs_list),
minor->debugfs_root, minor);
if (ret) {
dev_err(dev->dev, "could not install a5xx_debugfs_list\n");
return ret;
}
ent = debugfs_create_file("reset", S_IWUGO,
minor->debugfs_root,
dev, &reset_fops);
if (!ent)
return -ENOMEM;
return 0;
}
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