drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #define pr_fmt(fmt)     "[drm:%s:%d] " fmt, __func__, __LINE__
   7
   8 #include "msm_disp_snapshot.h"
   9
  10 static void msm_disp_state_dump_regs(u32 **reg, u32 aligned_len, void __iomem *base_addr)
  11 {
  12         u32 len_padded;
  13         u32 num_rows;
  14         u32 x0, x4, x8, xc;
  15         void __iomem *addr;
  16         u32 *dump_addr = NULL;
  17         void __iomem *end_addr;
  18         int i;
  19
  20         len_padded = aligned_len * REG_DUMP_ALIGN;
  21         num_rows = aligned_len / REG_DUMP_ALIGN;
  22
  23         addr = base_addr;
  24         end_addr = base_addr + aligned_len;
  25
  26         if (!(*reg))
  27                 *reg = kzalloc(len_padded, GFP_KERNEL);
  28
  29         if (*reg)
  30                 dump_addr = *reg;
  31
  32         for (i = 0; i < num_rows; i++) {
  33                 x0 = (addr < end_addr) ? readl_relaxed(addr + 0x0) : 0;
  34                 x4 = (addr + 0x4 < end_addr) ? readl_relaxed(addr + 0x4) : 0;
  35                 x8 = (addr + 0x8 < end_addr) ? readl_relaxed(addr + 0x8) : 0;
  36                 xc = (addr + 0xc < end_addr) ? readl_relaxed(addr + 0xc) : 0;
  37
  38                 if (dump_addr) {
  39                         dump_addr[i * 4] = x0;
  40                         dump_addr[i * 4 + 1] = x4;
  41                         dump_addr[i * 4 + 2] = x8;
  42                         dump_addr[i * 4 + 3] = xc;
  43                 }
  44
  45                 addr += REG_DUMP_ALIGN;
  46         }
  47 }
  48
  49 static void msm_disp_state_print_regs(u32 **reg, u32 len, void __iomem *base_addr,
  50                 struct drm_printer *p)
  51 {
  52         int i;
  53         u32 *dump_addr = NULL;
  54         void __iomem *addr;
  55         u32 num_rows;
  56
  57         addr = base_addr;
  58         num_rows = len / REG_DUMP_ALIGN;
  59
  60         if (*reg)
  61                 dump_addr = *reg;
  62
  63         for (i = 0; i < num_rows; i++) {
  64                 drm_printf(p, "0x%lx : %08x %08x %08x %08x\n",
  65                                 (unsigned long)(addr - base_addr),
  66                                 dump_addr[i * 4], dump_addr[i * 4 + 1],
  67                                 dump_addr[i * 4 + 2], dump_addr[i * 4 + 3]);
  68                 addr += REG_DUMP_ALIGN;
  69         }
  70 }
  71
  72 void msm_disp_state_print(struct msm_disp_state *state, struct drm_printer *p)
  73 {
  74         struct msm_disp_state_block *block, *tmp;
  75
  76         if (!p) {
  77                 DRM_ERROR("invalid drm printer\n");
  78                 return;
  79         }
  80
  81         drm_printf(p, "---\n");
  82
  83         drm_printf(p, "module: " KBUILD_MODNAME "\n");
  84         drm_printf(p, "dpu devcoredump\n");
  85         drm_printf(p, "timestamp %lld\n", ktime_to_ns(state->timestamp));
  86
  87         list_for_each_entry_safe(block, tmp, &state->blocks, node) {
  88                 drm_printf(p, "====================%s================\n", block->name);
  89                 msm_disp_state_print_regs(&block->state, block->size, block->base_addr, p);
  90         }
  91
  92         drm_printf(p, "===================dpu drm state================\n");
  93
  94         if (state->atomic_state)
  95                 drm_atomic_print_new_state(state->atomic_state, p);
  96 }
  97
  98 static void msm_disp_capture_atomic_state(struct msm_disp_state *disp_state)
  99 {
 100         struct drm_device *ddev;
 101         struct drm_modeset_acquire_ctx ctx;
 102
 103         disp_state->timestamp = ktime_get();
 104
 105         ddev = disp_state->drm_dev;
 106
 107         drm_modeset_acquire_init(&ctx, 0);
 108
 109         while (drm_modeset_lock_all_ctx(ddev, &ctx) != 0)
 110                 drm_modeset_backoff(&ctx);
 111
 112         disp_state->atomic_state = drm_atomic_helper_duplicate_state(ddev,
 113                         &ctx);
 114         drm_modeset_drop_locks(&ctx);
 115         drm_modeset_acquire_fini(&ctx);
 116 }
 117
 118 void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state)
 119 {
 120         struct msm_drm_private *priv;
 121         struct drm_device *drm_dev;
 122         struct msm_kms *kms;
 123         int i;
 124
 125         drm_dev = disp_state->drm_dev;
 126         priv = drm_dev->dev_private;
 127         kms = priv->kms;
 128
 129         if (priv->dp)
 130                 msm_dp_snapshot(disp_state, priv->dp);
 131
 132         for (i = 0; i < ARRAY_SIZE(priv->dsi); i++) {
 133                 if (!priv->dsi[i])
 134                         continue;
 135
 136                 msm_dsi_snapshot(disp_state, priv->dsi[i]);
 137         }
 138
 139         if (kms->funcs->snapshot)
 140                 kms->funcs->snapshot(disp_state, kms);
 141
 142         msm_disp_capture_atomic_state(disp_state);
 143 }
 144
 145 void msm_disp_state_free(void *data)
 146 {
 147         struct msm_disp_state *disp_state = data;
 148         struct msm_disp_state_block *block, *tmp;
 149
 150         if (disp_state->atomic_state) {
 151                 drm_atomic_state_put(disp_state->atomic_state);
 152                 disp_state->atomic_state = NULL;
 153         }
 154
 155         list_for_each_entry_safe(block, tmp, &disp_state->blocks, node) {
 156                 list_del(&block->node);
 157                 kfree(block->state);
 158                 kfree(block);
 159         }
 160
 161         kfree(disp_state);
 162 }
 163
 164 void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len,
 165                 void __iomem *base_addr, const char *fmt, ...)
 166 {
 167         struct msm_disp_state_block *new_blk;
 168         struct va_format vaf;
 169         va_list va;
 170
 171         new_blk = kzalloc(sizeof(struct msm_disp_state_block), GFP_KERNEL);
 172
 173         va_start(va, fmt);
 174
 175         vaf.fmt = fmt;
 176         vaf.va = &va;
 177         snprintf(new_blk->name, sizeof(new_blk->name), "%pV", &vaf);
 178
 179         va_end(va);
 180
 181         INIT_LIST_HEAD(&new_blk->node);
 182         new_blk->size = ALIGN(len, REG_DUMP_ALIGN);
 183         new_blk->base_addr = base_addr;
 184
 185         msm_disp_state_dump_regs(&new_blk->state, new_blk->size, base_addr);
 186         list_add(&new_blk->node, &disp_state->blocks);
 187 }