drivers/gpu/drm/etnaviv/etnaviv_dump.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2015-2018 Etnaviv Project
   4  */
   5
   6 #include <linux/devcoredump.h>
   7 #include <linux/moduleparam.h>
   8
   9 #include "etnaviv_cmdbuf.h"
  10 #include "etnaviv_dump.h"
  11 #include "etnaviv_gem.h"
  12 #include "etnaviv_gpu.h"
  13 #include "etnaviv_mmu.h"
  14 #include "etnaviv_sched.h"
  15 #include "state.xml.h"
  16 #include "state_hi.xml.h"
  17
  18 static bool etnaviv_dump_core = true;
  19 module_param_named(dump_core, etnaviv_dump_core, bool, 0600);
  20
  21 struct core_dump_iterator {
  22         void *start;
  23         struct etnaviv_dump_object_header *hdr;
  24         void *data;
  25 };
  26
  27 static const unsigned short etnaviv_dump_registers[] = {
  28         VIVS_HI_AXI_STATUS,
  29         VIVS_HI_CLOCK_CONTROL,
  30         VIVS_HI_IDLE_STATE,
  31         VIVS_HI_AXI_CONFIG,
  32         VIVS_HI_INTR_ENBL,
  33         VIVS_HI_CHIP_IDENTITY,
  34         VIVS_HI_CHIP_FEATURE,
  35         VIVS_HI_CHIP_MODEL,
  36         VIVS_HI_CHIP_REV,
  37         VIVS_HI_CHIP_DATE,
  38         VIVS_HI_CHIP_TIME,
  39         VIVS_HI_CHIP_MINOR_FEATURE_0,
  40         VIVS_HI_CACHE_CONTROL,
  41         VIVS_HI_AXI_CONTROL,
  42         VIVS_PM_POWER_CONTROLS,
  43         VIVS_PM_MODULE_CONTROLS,
  44         VIVS_PM_MODULE_STATUS,
  45         VIVS_PM_PULSE_EATER,
  46         VIVS_MC_MMU_FE_PAGE_TABLE,
  47         VIVS_MC_MMU_TX_PAGE_TABLE,
  48         VIVS_MC_MMU_PE_PAGE_TABLE,
  49         VIVS_MC_MMU_PEZ_PAGE_TABLE,
  50         VIVS_MC_MMU_RA_PAGE_TABLE,
  51         VIVS_MC_DEBUG_MEMORY,
  52         VIVS_MC_MEMORY_BASE_ADDR_RA,
  53         VIVS_MC_MEMORY_BASE_ADDR_FE,
  54         VIVS_MC_MEMORY_BASE_ADDR_TX,
  55         VIVS_MC_MEMORY_BASE_ADDR_PEZ,
  56         VIVS_MC_MEMORY_BASE_ADDR_PE,
  57         VIVS_MC_MEMORY_TIMING_CONTROL,
  58         VIVS_MC_BUS_CONFIG,
  59         VIVS_FE_DMA_STATUS,
  60         VIVS_FE_DMA_DEBUG_STATE,
  61         VIVS_FE_DMA_ADDRESS,
  62         VIVS_FE_DMA_LOW,
  63         VIVS_FE_DMA_HIGH,
  64         VIVS_FE_AUTO_FLUSH,
  65 };
  66
  67 static void etnaviv_core_dump_header(struct core_dump_iterator *iter,
  68         u32 type, void *data_end)
  69 {
  70         struct etnaviv_dump_object_header *hdr = iter->hdr;
  71
  72         hdr->magic = cpu_to_le32(ETDUMP_MAGIC);
  73         hdr->type = cpu_to_le32(type);
  74         hdr->file_offset = cpu_to_le32(iter->data - iter->start);
  75         hdr->file_size = cpu_to_le32(data_end - iter->data);
  76
  77         iter->hdr++;
  78         iter->data += hdr->file_size;
  79 }
  80
  81 static void etnaviv_core_dump_registers(struct core_dump_iterator *iter,
  82         struct etnaviv_gpu *gpu)
  83 {
  84         struct etnaviv_dump_registers *reg = iter->data;
  85         unsigned int i;
  86
  87         for (i = 0; i < ARRAY_SIZE(etnaviv_dump_registers); i++, reg++) {
  88                 reg->reg = etnaviv_dump_registers[i];
  89                 reg->value = gpu_read(gpu, etnaviv_dump_registers[i]);
  90         }
  91
  92         etnaviv_core_dump_header(iter, ETDUMP_BUF_REG, reg);
  93 }
  94
  95 static void etnaviv_core_dump_mmu(struct core_dump_iterator *iter,
  96         struct etnaviv_iommu_context *mmu, size_t mmu_size)
  97 {
  98         etnaviv_iommu_dump(mmu, iter->data);
  99
 100         etnaviv_core_dump_header(iter, ETDUMP_BUF_MMU, iter->data + mmu_size);
 101 }
 102
 103 static void etnaviv_core_dump_mem(struct core_dump_iterator *iter, u32 type,
 104         void *ptr, size_t size, u64 iova)
 105 {
 106         memcpy(iter->data, ptr, size);
 107
 108         iter->hdr->iova = cpu_to_le64(iova);
 109
 110         etnaviv_core_dump_header(iter, type, iter->data + size);
 111 }
 112
 113 void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
 114 {
 115         struct etnaviv_gpu *gpu = submit->gpu;
 116         struct core_dump_iterator iter;
 117         struct etnaviv_gem_object *obj;
 118         unsigned int n_obj, n_bomap_pages;
 119         size_t file_size, mmu_size;
 120         __le64 *bomap, *bomap_start;
 121         int i;
 122
 123         /* Only catch the first event, or when manually re-armed */
 124         if (!etnaviv_dump_core)
 125                 return;
 126         etnaviv_dump_core = false;
 127
 128         mutex_lock(&gpu->mmu_context->lock);
 129
 130         mmu_size = etnaviv_iommu_dump_size(gpu->mmu_context);
 131
 132         /* We always dump registers, mmu, ring, hanging cmdbuf and end marker */
 133         n_obj = 5;
 134         n_bomap_pages = 0;
 135         file_size = ARRAY_SIZE(etnaviv_dump_registers) *
 136                         sizeof(struct etnaviv_dump_registers) +
 137                     mmu_size + gpu->buffer.size + submit->cmdbuf.size;
 138
 139         /* Add in the active buffer objects */
 140         for (i = 0; i < submit->nr_bos; i++) {
 141                 obj = submit->bos[i].obj;
 142                 file_size += obj->base.size;
 143                 n_bomap_pages += obj->base.size >> PAGE_SHIFT;
 144                 n_obj++;
 145         }
 146
 147         /* If we have any buffer objects, add a bomap object */
 148         if (n_bomap_pages) {
 149                 file_size += n_bomap_pages * sizeof(__le64);
 150                 n_obj++;
 151         }
 152
 153         /* Add the size of the headers */
 154         file_size += sizeof(*iter.hdr) * n_obj;
 155
 156         /* Allocate the file in vmalloc memory, it's likely to be big */
 157         iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN |
 158                         __GFP_NORETRY);
 159         if (!iter.start) {
 160                 mutex_unlock(&gpu->mmu_context->lock);
 161                 dev_warn(gpu->dev, "failed to allocate devcoredump file\n");
 162                 return;
 163         }
 164
 165         /* Point the data member after the headers */
 166         iter.hdr = iter.start;
 167         iter.data = &iter.hdr[n_obj];
 168
 169         memset(iter.hdr, 0, iter.data - iter.start);
 170
 171         etnaviv_core_dump_registers(&iter, gpu);
 172         etnaviv_core_dump_mmu(&iter, gpu->mmu_context, mmu_size);
 173         etnaviv_core_dump_mem(&iter, ETDUMP_BUF_RING, gpu->buffer.vaddr,
 174                               gpu->buffer.size,
 175                               etnaviv_cmdbuf_get_va(&gpu->buffer,
 176                                         &gpu->mmu_context->cmdbuf_mapping));
 177
 178         etnaviv_core_dump_mem(&iter, ETDUMP_BUF_CMD,
 179                               submit->cmdbuf.vaddr, submit->cmdbuf.size,
 180                               etnaviv_cmdbuf_get_va(&submit->cmdbuf,
 181                                         &gpu->mmu_context->cmdbuf_mapping));
 182
 183         mutex_unlock(&gpu->mmu_context->lock);
 184
 185         /* Reserve space for the bomap */
 186         if (n_bomap_pages) {
 187                 bomap_start = bomap = iter.data;
 188                 memset(bomap, 0, sizeof(*bomap) * n_bomap_pages);
 189                 etnaviv_core_dump_header(&iter, ETDUMP_BUF_BOMAP,
 190                                          bomap + n_bomap_pages);
 191         } else {
 192                 /* Silence warning */
 193                 bomap_start = bomap = NULL;
 194         }
 195
 196         for (i = 0; i < submit->nr_bos; i++) {
 197                 struct etnaviv_vram_mapping *vram;
 198                 struct page **pages;
 199                 void *vaddr;
 200
 201                 obj = submit->bos[i].obj;
 202                 vram = submit->bos[i].mapping;
 203
 204                 mutex_lock(&obj->lock);
 205                 pages = etnaviv_gem_get_pages(obj);
 206                 mutex_unlock(&obj->lock);
 207                 if (!IS_ERR(pages)) {
 208                         int j;
 209
 210                         iter.hdr->data[0] = bomap - bomap_start;
 211
 212                         for (j = 0; j < obj->base.size >> PAGE_SHIFT; j++)
 213                                 *bomap++ = cpu_to_le64(page_to_phys(*pages++));
 214                 }
 215
 216                 iter.hdr->iova = cpu_to_le64(vram->iova);
 217
 218                 vaddr = etnaviv_gem_vmap(&obj->base);
 219                 if (vaddr)
 220                         memcpy(iter.data, vaddr, obj->base.size);
 221
 222                 etnaviv_core_dump_header(&iter, ETDUMP_BUF_BO, iter.data +
 223                                          obj->base.size);
 224         }
 225
 226         etnaviv_core_dump_header(&iter, ETDUMP_BUF_END, iter.data);
 227
 228         dev_coredumpv(gpu->dev, iter.start, iter.data - iter.start, GFP_KERNEL);
 229 }