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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__
#include "msm_disp_snapshot.h"
static void msm_disp_state_dump_regs(u32 **reg, u32 aligned_len, void __iomem *base_addr)
{
u32 len_padded;
u32 num_rows;
u32 x0, x4, x8, xc;
void __iomem *addr;
u32 *dump_addr = NULL;
void __iomem *end_addr;
int i;
len_padded = aligned_len * REG_DUMP_ALIGN;
num_rows = aligned_len / REG_DUMP_ALIGN;
addr = base_addr;
end_addr = base_addr + aligned_len;
if (!(*reg))
*reg = kzalloc(len_padded, GFP_KERNEL);
if (*reg)
dump_addr = *reg;
for (i = 0; i < num_rows; i++) {
x0 = (addr < end_addr) ? readl_relaxed(addr + 0x0) : 0;
x4 = (addr + 0x4 < end_addr) ? readl_relaxed(addr + 0x4) : 0;
x8 = (addr + 0x8 < end_addr) ? readl_relaxed(addr + 0x8) : 0;
xc = (addr + 0xc < end_addr) ? readl_relaxed(addr + 0xc) : 0;
if (dump_addr) {
dump_addr[i * 4] = x0;
dump_addr[i * 4 + 1] = x4;
dump_addr[i * 4 + 2] = x8;
dump_addr[i * 4 + 3] = xc;
}
addr += REG_DUMP_ALIGN;
}
}
static void msm_disp_state_print_regs(u32 **reg, u32 len, void __iomem *base_addr,
struct drm_printer *p)
{
int i;
u32 *dump_addr = NULL;
void __iomem *addr;
u32 num_rows;
addr = base_addr;
num_rows = len / REG_DUMP_ALIGN;
if (*reg)
dump_addr = *reg;
for (i = 0; i < num_rows; i++) {
drm_printf(p, "0x%lx : %08x %08x %08x %08x\n",
(unsigned long)(addr - base_addr),
dump_addr[i * 4], dump_addr[i * 4 + 1],
dump_addr[i * 4 + 2], dump_addr[i * 4 + 3]);
addr += REG_DUMP_ALIGN;
}
}
void msm_disp_state_print(struct msm_disp_state *state, struct drm_printer *p)
{
struct msm_disp_state_block *block, *tmp;
if (!p) {
DRM_ERROR("invalid drm printer\n");
return;
}
drm_printf(p, "---\n");
drm_printf(p, "module: " KBUILD_MODNAME "\n");
drm_printf(p, "dpu devcoredump\n");
drm_printf(p, "timestamp %lld\n", ktime_to_ns(state->timestamp));
list_for_each_entry_safe(block, tmp, &state->blocks, node) {
drm_printf(p, "====================%s================\n", block->name);
msm_disp_state_print_regs(&block->state, block->size, block->base_addr, p);
}
drm_printf(p, "===================dpu drm state================\n");
if (state->atomic_state)
drm_atomic_print_new_state(state->atomic_state, p);
}
static void msm_disp_capture_atomic_state(struct msm_disp_state *disp_state)
{
struct drm_device *ddev;
struct drm_modeset_acquire_ctx ctx;
disp_state->timestamp = ktime_get();
ddev = disp_state->drm_dev;
drm_modeset_acquire_init(&ctx, 0);
while (drm_modeset_lock_all_ctx(ddev, &ctx) != 0)
drm_modeset_backoff(&ctx);
disp_state->atomic_state = drm_atomic_helper_duplicate_state(ddev,
&ctx);
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
}
void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state)
{
struct msm_drm_private *priv;
struct drm_device *drm_dev;
struct msm_kms *kms;
int i;
drm_dev = disp_state->drm_dev;
priv = drm_dev->dev_private;
kms = priv->kms;
for (i = 0; i < ARRAY_SIZE(priv->dp); i++) {
if (!priv->dp[i])
continue;
msm_dp_snapshot(disp_state, priv->dp[i]);
}
for (i = 0; i < ARRAY_SIZE(priv->dsi); i++) {
if (!priv->dsi[i])
continue;
msm_dsi_snapshot(disp_state, priv->dsi[i]);
}
if (kms->funcs->snapshot)
kms->funcs->snapshot(disp_state, kms);
msm_disp_capture_atomic_state(disp_state);
}
void msm_disp_state_free(void *data)
{
struct msm_disp_state *disp_state = data;
struct msm_disp_state_block *block, *tmp;
if (disp_state->atomic_state) {
drm_atomic_state_put(disp_state->atomic_state);
disp_state->atomic_state = NULL;
}
list_for_each_entry_safe(block, tmp, &disp_state->blocks, node) {
list_del(&block->node);
kfree(block->state);
kfree(block);
}
kfree(disp_state);
}
void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len,
void __iomem *base_addr, const char *fmt, ...)
{
struct msm_disp_state_block *new_blk;
struct va_format vaf;
va_list va;
new_blk = kzalloc(sizeof(struct msm_disp_state_block), GFP_KERNEL);
va_start(va, fmt);
vaf.fmt = fmt;
vaf.va = &va;
snprintf(new_blk->name, sizeof(new_blk->name), "%pV", &vaf);
va_end(va);
INIT_LIST_HEAD(&new_blk->node);
new_blk->size = ALIGN(len, REG_DUMP_ALIGN);
new_blk->base_addr = base_addr;
msm_disp_state_dump_regs(&new_blk->state, new_blk->size, base_addr);
list_add(&new_blk->node, &disp_state->blocks);
}
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