| 1 | /* | 
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| 2 | * Copyright (c) 2008 Intel Corporation | 
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| 3 | * | 
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a | 
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| 5 | * copy of this software and associated documentation files (the "Software"), | 
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| 6 | * to deal in the Software without restriction, including without limitation | 
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | 
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the | 
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| 9 | * Software is furnished to do so, subject to the following conditions: | 
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| 10 | * | 
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| 11 | * The above copyright notice and this permission notice (including the next | 
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| 12 | * paragraph) shall be included in all copies or substantial portions of the | 
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| 13 | * Software. | 
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| 14 | * | 
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | 
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | 
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL | 
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | 
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | 
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | 
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| 21 | * IN THE SOFTWARE. | 
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| 22 | * | 
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| 23 | * Authors: | 
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| 24 | *    Eric Anholt <eric@anholt.net> | 
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| 25 | *    Keith Packard <keithp@keithp.com> | 
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| 26 | *    Mika Kuoppala <mika.kuoppala@intel.com> | 
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| 27 | * | 
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| 28 | */ | 
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| 29 |  | 
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| 30 | #include <linux/ascii85.h> | 
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| 31 | #include <linux/debugfs.h> | 
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| 32 | #include <linux/highmem.h> | 
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| 33 | #include <linux/nmi.h> | 
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| 34 | #include <linux/pagevec.h> | 
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| 35 | #include <linux/scatterlist.h> | 
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| 36 | #include <linux/string_helpers.h> | 
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| 37 | #include <linux/utsname.h> | 
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| 38 | #include <linux/zlib.h> | 
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| 39 |  | 
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| 40 | #include <drm/drm_cache.h> | 
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| 41 | #include <drm/drm_print.h> | 
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| 42 |  | 
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| 43 | #include "display/intel_display_snapshot.h" | 
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| 44 |  | 
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| 45 | #include "gem/i915_gem_context.h" | 
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| 46 | #include "gem/i915_gem_lmem.h" | 
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| 47 | #include "gt/intel_engine_regs.h" | 
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| 48 | #include "gt/intel_gt.h" | 
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| 49 | #include "gt/intel_gt_mcr.h" | 
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| 50 | #include "gt/intel_gt_pm.h" | 
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| 51 | #include "gt/intel_gt_regs.h" | 
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| 52 | #include "gt/uc/intel_guc_capture.h" | 
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| 53 |  | 
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| 54 | #include "i915_driver.h" | 
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| 55 | #include "i915_drv.h" | 
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| 56 | #include "i915_gpu_error.h" | 
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| 57 | #include "i915_memcpy.h" | 
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| 58 | #include "i915_reg.h" | 
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| 59 | #include "i915_scatterlist.h" | 
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| 60 | #include "i915_sysfs.h" | 
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| 61 | #include "i915_utils.h" | 
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| 62 |  | 
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| 63 | #define ALLOW_FAIL (__GFP_KSWAPD_RECLAIM | __GFP_RETRY_MAYFAIL | __GFP_NOWARN) | 
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| 64 | #define ATOMIC_MAYFAIL (GFP_ATOMIC | __GFP_NOWARN) | 
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| 65 |  | 
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| 66 | static void __sg_set_buf(struct scatterlist *sg, | 
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| 67 | void *addr, unsigned int len, loff_t it) | 
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| 68 | { | 
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| 69 | sg->page_link = (unsigned long)virt_to_page(addr); | 
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| 70 | sg->offset = offset_in_page(addr); | 
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| 71 | sg->length = len; | 
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| 72 | sg->dma_address = it; | 
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| 73 | } | 
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| 74 |  | 
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| 75 | static bool __i915_error_grow(struct drm_i915_error_state_buf *e, size_t len) | 
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| 76 | { | 
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| 77 | if (!len) | 
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| 78 | return false; | 
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| 79 |  | 
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| 80 | if (e->bytes + len + 1 <= e->size) | 
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| 81 | return true; | 
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| 82 |  | 
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| 83 | if (e->bytes) { | 
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| 84 | __sg_set_buf(sg: e->cur++, addr: e->buf, len: e->bytes, it: e->iter); | 
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| 85 | e->iter += e->bytes; | 
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| 86 | e->buf = NULL; | 
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| 87 | e->bytes = 0; | 
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| 88 | } | 
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| 89 |  | 
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| 90 | if (e->cur == e->end) { | 
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| 91 | struct scatterlist *sgl; | 
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| 92 |  | 
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| 93 | sgl = (typeof(sgl))__get_free_page(ALLOW_FAIL); | 
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| 94 | if (!sgl) { | 
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| 95 | e->err = -ENOMEM; | 
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| 96 | return false; | 
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| 97 | } | 
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| 98 |  | 
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| 99 | if (e->cur) { | 
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| 100 | e->cur->offset = 0; | 
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| 101 | e->cur->length = 0; | 
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| 102 | e->cur->page_link = | 
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| 103 | (unsigned long)sgl | SG_CHAIN; | 
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| 104 | } else { | 
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| 105 | e->sgl = sgl; | 
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| 106 | } | 
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| 107 |  | 
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| 108 | e->cur = sgl; | 
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| 109 | e->end = sgl + SG_MAX_SINGLE_ALLOC - 1; | 
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| 110 | } | 
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| 111 |  | 
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| 112 | e->size = ALIGN(len + 1, SZ_64K); | 
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| 113 | e->buf = kmalloc(e->size, ALLOW_FAIL); | 
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| 114 | if (!e->buf) { | 
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| 115 | e->size = PAGE_ALIGN(len + 1); | 
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| 116 | e->buf = kmalloc(e->size, GFP_KERNEL); | 
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| 117 | } | 
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| 118 | if (!e->buf) { | 
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| 119 | e->err = -ENOMEM; | 
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| 120 | return false; | 
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| 121 | } | 
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| 122 |  | 
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| 123 | return true; | 
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| 124 | } | 
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| 125 |  | 
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| 126 | __printf(2, 0) | 
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| 127 | static void i915_error_vprintf(struct drm_i915_error_state_buf *e, | 
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| 128 | const char *fmt, va_list args) | 
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| 129 | { | 
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| 130 | va_list ap; | 
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| 131 | int len; | 
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| 132 |  | 
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| 133 | if (e->err) | 
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| 134 | return; | 
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| 135 |  | 
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| 136 | va_copy(ap, args); | 
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| 137 | len = vsnprintf(NULL, size: 0, fmt, args: ap); | 
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| 138 | va_end(ap); | 
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| 139 | if (len <= 0) { | 
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| 140 | e->err = len; | 
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| 141 | return; | 
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| 142 | } | 
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| 143 |  | 
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| 144 | if (!__i915_error_grow(e, len)) | 
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| 145 | return; | 
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| 146 |  | 
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| 147 | GEM_BUG_ON(e->bytes >= e->size); | 
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| 148 | len = vscnprintf(buf: e->buf + e->bytes, size: e->size - e->bytes, fmt, args); | 
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| 149 | if (len < 0) { | 
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| 150 | e->err = len; | 
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| 151 | return; | 
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| 152 | } | 
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| 153 | e->bytes += len; | 
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| 154 | } | 
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| 155 |  | 
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| 156 | static void i915_error_puts(struct drm_i915_error_state_buf *e, const char *str) | 
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| 157 | { | 
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| 158 | unsigned len; | 
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| 159 |  | 
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| 160 | if (e->err || !str) | 
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| 161 | return; | 
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| 162 |  | 
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| 163 | len = strlen(str); | 
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| 164 | if (!__i915_error_grow(e, len)) | 
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| 165 | return; | 
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| 166 |  | 
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| 167 | GEM_BUG_ON(e->bytes + len > e->size); | 
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| 168 | memcpy(to: e->buf + e->bytes, from: str, len); | 
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| 169 | e->bytes += len; | 
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| 170 | } | 
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| 171 |  | 
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| 172 | #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__) | 
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| 173 | #define err_puts(e, s) i915_error_puts(e, s) | 
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| 174 |  | 
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| 175 | static void __i915_printfn_error(struct drm_printer *p, struct va_format *vaf) | 
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| 176 | { | 
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| 177 | i915_error_vprintf(e: p->arg, fmt: vaf->fmt, args: *vaf->va); | 
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| 178 | } | 
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| 179 |  | 
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| 180 | static inline struct drm_printer | 
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| 181 | i915_error_printer(struct drm_i915_error_state_buf *e) | 
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| 182 | { | 
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| 183 | struct drm_printer p = { | 
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| 184 | .printfn = __i915_printfn_error, | 
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| 185 | .arg = e, | 
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| 186 | }; | 
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| 187 | return p; | 
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| 188 | } | 
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| 189 |  | 
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| 190 | /* single threaded page allocator with a reserved stash for emergencies */ | 
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| 191 | static void pool_fini(struct folio_batch *fbatch) | 
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| 192 | { | 
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| 193 | folio_batch_release(fbatch); | 
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| 194 | } | 
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| 195 |  | 
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| 196 | static int pool_refill(struct folio_batch *fbatch, gfp_t gfp) | 
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| 197 | { | 
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| 198 | while (folio_batch_space(fbatch)) { | 
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| 199 | struct folio *folio; | 
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| 200 |  | 
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| 201 | folio = folio_alloc(gfp, 0); | 
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| 202 | if (!folio) | 
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| 203 | return -ENOMEM; | 
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| 204 |  | 
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| 205 | folio_batch_add(fbatch, folio); | 
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| 206 | } | 
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| 207 |  | 
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| 208 | return 0; | 
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| 209 | } | 
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| 210 |  | 
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| 211 | static int pool_init(struct folio_batch *fbatch, gfp_t gfp) | 
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| 212 | { | 
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| 213 | int err; | 
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| 214 |  | 
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| 215 | folio_batch_init(fbatch); | 
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| 216 |  | 
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| 217 | err = pool_refill(fbatch, gfp); | 
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| 218 | if (err) | 
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| 219 | pool_fini(fbatch); | 
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| 220 |  | 
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| 221 | return err; | 
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| 222 | } | 
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| 223 |  | 
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| 224 | static void *pool_alloc(struct folio_batch *fbatch, gfp_t gfp) | 
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| 225 | { | 
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| 226 | struct folio *folio; | 
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| 227 |  | 
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| 228 | folio = folio_alloc(gfp, 0); | 
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| 229 | if (!folio && folio_batch_count(fbatch)) | 
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| 230 | folio = fbatch->folios[--fbatch->nr]; | 
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| 231 |  | 
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| 232 | return folio ? folio_address(folio) : NULL; | 
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| 233 | } | 
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| 234 |  | 
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| 235 | static void pool_free(struct folio_batch *fbatch, void *addr) | 
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| 236 | { | 
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| 237 | struct folio *folio = virt_to_folio(x: addr); | 
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| 238 |  | 
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| 239 | if (folio_batch_space(fbatch)) | 
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| 240 | folio_batch_add(fbatch, folio); | 
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| 241 | else | 
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| 242 | folio_put(folio); | 
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| 243 | } | 
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| 244 |  | 
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| 245 | #ifdef CONFIG_DRM_I915_COMPRESS_ERROR | 
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| 246 |  | 
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| 247 | struct i915_vma_compress { | 
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| 248 | struct folio_batch pool; | 
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| 249 | struct z_stream_s zstream; | 
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| 250 | void *tmp; | 
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| 251 | }; | 
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| 252 |  | 
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| 253 | static bool compress_init(struct i915_vma_compress *c) | 
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| 254 | { | 
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| 255 | struct z_stream_s *zstream = &c->zstream; | 
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| 256 |  | 
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| 257 | if (pool_init(fbatch: &c->pool, ALLOW_FAIL)) | 
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| 258 | return false; | 
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| 259 |  | 
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| 260 | zstream->workspace = | 
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| 261 | kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL), | 
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| 262 | ALLOW_FAIL); | 
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| 263 | if (!zstream->workspace) { | 
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| 264 | pool_fini(fbatch: &c->pool); | 
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| 265 | return false; | 
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| 266 | } | 
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| 267 |  | 
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| 268 | c->tmp = NULL; | 
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| 269 | if (i915_has_memcpy_from_wc()) | 
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| 270 | c->tmp = pool_alloc(fbatch: &c->pool, ALLOW_FAIL); | 
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| 271 |  | 
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| 272 | return true; | 
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| 273 | } | 
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| 274 |  | 
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| 275 | static bool compress_start(struct i915_vma_compress *c) | 
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| 276 | { | 
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| 277 | struct z_stream_s *zstream = &c->zstream; | 
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| 278 | void *workspace = zstream->workspace; | 
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| 279 |  | 
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| 280 | memset(s: zstream, c: 0, n: sizeof(*zstream)); | 
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| 281 | zstream->workspace = workspace; | 
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| 282 |  | 
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| 283 | return zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) == Z_OK; | 
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| 284 | } | 
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| 285 |  | 
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| 286 | static void *compress_next_page(struct i915_vma_compress *c, | 
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| 287 | struct i915_vma_coredump *dst) | 
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| 288 | { | 
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| 289 | void *page_addr; | 
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| 290 | struct page *page; | 
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| 291 |  | 
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| 292 | page_addr = pool_alloc(fbatch: &c->pool, ALLOW_FAIL); | 
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| 293 | if (!page_addr) | 
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| 294 | return ERR_PTR(error: -ENOMEM); | 
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| 295 |  | 
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| 296 | page = virt_to_page(page_addr); | 
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| 297 | list_add_tail(new: &page->lru, head: &dst->page_list); | 
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| 298 | return page_addr; | 
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| 299 | } | 
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| 300 |  | 
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| 301 | static int compress_page(struct i915_vma_compress *c, | 
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| 302 | void *src, | 
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| 303 | struct i915_vma_coredump *dst, | 
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| 304 | bool wc) | 
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| 305 | { | 
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| 306 | struct z_stream_s *zstream = &c->zstream; | 
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| 307 |  | 
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| 308 | zstream->next_in = src; | 
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| 309 | if (wc && c->tmp && i915_memcpy_from_wc(dst: c->tmp, src, PAGE_SIZE)) | 
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| 310 | zstream->next_in = c->tmp; | 
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| 311 | zstream->avail_in = PAGE_SIZE; | 
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| 312 |  | 
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| 313 | do { | 
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| 314 | if (zstream->avail_out == 0) { | 
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| 315 | zstream->next_out = compress_next_page(c, dst); | 
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| 316 | if (IS_ERR(ptr: zstream->next_out)) | 
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| 317 | return PTR_ERR(ptr: zstream->next_out); | 
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| 318 |  | 
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| 319 | zstream->avail_out = PAGE_SIZE; | 
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| 320 | } | 
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| 321 |  | 
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| 322 | if (zlib_deflate(strm: zstream, Z_NO_FLUSH) != Z_OK) | 
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| 323 | return -EIO; | 
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| 324 |  | 
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| 325 | cond_resched(); | 
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| 326 | } while (zstream->avail_in); | 
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| 327 |  | 
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| 328 | /* Fallback to uncompressed if we increase size? */ | 
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| 329 | if (0 && zstream->total_out > zstream->total_in) | 
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| 330 | return -E2BIG; | 
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| 331 |  | 
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| 332 | return 0; | 
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| 333 | } | 
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| 334 |  | 
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| 335 | static int compress_flush(struct i915_vma_compress *c, | 
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| 336 | struct i915_vma_coredump *dst) | 
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| 337 | { | 
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| 338 | struct z_stream_s *zstream = &c->zstream; | 
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| 339 |  | 
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| 340 | do { | 
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| 341 | switch (zlib_deflate(strm: zstream, Z_FINISH)) { | 
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| 342 | case Z_OK: /* more space requested */ | 
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| 343 | zstream->next_out = compress_next_page(c, dst); | 
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| 344 | if (IS_ERR(ptr: zstream->next_out)) | 
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| 345 | return PTR_ERR(ptr: zstream->next_out); | 
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| 346 |  | 
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| 347 | zstream->avail_out = PAGE_SIZE; | 
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| 348 | break; | 
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| 349 |  | 
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| 350 | case Z_STREAM_END: | 
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| 351 | goto end; | 
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| 352 |  | 
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| 353 | default: /* any error */ | 
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| 354 | return -EIO; | 
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| 355 | } | 
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| 356 | } while (1); | 
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| 357 |  | 
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| 358 | end: | 
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| 359 | memset(s: zstream->next_out, c: 0, n: zstream->avail_out); | 
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| 360 | dst->unused = zstream->avail_out; | 
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| 361 | return 0; | 
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| 362 | } | 
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| 363 |  | 
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| 364 | static void compress_finish(struct i915_vma_compress *c) | 
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| 365 | { | 
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| 366 | zlib_deflateEnd(strm: &c->zstream); | 
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| 367 | } | 
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| 368 |  | 
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| 369 | static void compress_fini(struct i915_vma_compress *c) | 
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| 370 | { | 
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| 371 | kfree(objp: c->zstream.workspace); | 
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| 372 | if (c->tmp) | 
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| 373 | pool_free(fbatch: &c->pool, addr: c->tmp); | 
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| 374 | pool_fini(fbatch: &c->pool); | 
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| 375 | } | 
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| 376 |  | 
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| 377 | static void err_compression_marker(struct drm_i915_error_state_buf *m) | 
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| 378 | { | 
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| 379 | err_puts(m, ":"); | 
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| 380 | } | 
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| 381 |  | 
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| 382 | #else | 
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| 383 |  | 
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| 384 | struct i915_vma_compress { | 
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| 385 | struct folio_batch pool; | 
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| 386 | }; | 
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| 387 |  | 
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| 388 | static bool compress_init(struct i915_vma_compress *c) | 
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| 389 | { | 
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| 390 | return pool_init(&c->pool, ALLOW_FAIL) == 0; | 
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| 391 | } | 
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| 392 |  | 
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| 393 | static bool compress_start(struct i915_vma_compress *c) | 
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| 394 | { | 
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| 395 | return true; | 
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| 396 | } | 
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| 397 |  | 
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| 398 | static int compress_page(struct i915_vma_compress *c, | 
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| 399 | void *src, | 
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| 400 | struct i915_vma_coredump *dst, | 
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| 401 | bool wc) | 
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| 402 | { | 
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| 403 | void *ptr; | 
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| 404 |  | 
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| 405 | ptr = pool_alloc(&c->pool, ALLOW_FAIL); | 
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| 406 | if (!ptr) | 
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| 407 | return -ENOMEM; | 
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| 408 |  | 
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| 409 | if (!(wc && i915_memcpy_from_wc(ptr, src, PAGE_SIZE))) | 
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| 410 | memcpy(ptr, src, PAGE_SIZE); | 
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| 411 | list_add_tail(&virt_to_page(ptr)->lru, &dst->page_list); | 
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| 412 | cond_resched(); | 
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| 413 |  | 
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| 414 | return 0; | 
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| 415 | } | 
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| 416 |  | 
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| 417 | static int compress_flush(struct i915_vma_compress *c, | 
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| 418 | struct i915_vma_coredump *dst) | 
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| 419 | { | 
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| 420 | return 0; | 
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| 421 | } | 
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| 422 |  | 
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| 423 | static void compress_finish(struct i915_vma_compress *c) | 
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| 424 | { | 
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| 425 | } | 
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| 426 |  | 
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| 427 | static void compress_fini(struct i915_vma_compress *c) | 
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| 428 | { | 
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| 429 | pool_fini(&c->pool); | 
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| 430 | } | 
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| 431 |  | 
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| 432 | static void err_compression_marker(struct drm_i915_error_state_buf *m) | 
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| 433 | { | 
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| 434 | err_puts(m, "~"); | 
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| 435 | } | 
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| 436 |  | 
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| 437 | #endif | 
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| 438 |  | 
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| 439 | static void error_print_instdone(struct drm_i915_error_state_buf *m, | 
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| 440 | const struct intel_engine_coredump *ee) | 
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| 441 | { | 
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| 442 | int slice; | 
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| 443 | int subslice; | 
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| 444 | int iter; | 
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| 445 |  | 
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| 446 | err_printf(m, "  INSTDONE: 0x%08x\n", | 
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| 447 | ee->instdone.instdone); | 
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| 448 |  | 
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| 449 | if (ee->engine->class != RENDER_CLASS || GRAPHICS_VER(m->i915) <= 3) | 
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| 450 | return; | 
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| 451 |  | 
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| 452 | err_printf(m, "  SC_INSTDONE: 0x%08x\n", | 
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| 453 | ee->instdone.slice_common); | 
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| 454 |  | 
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| 455 | if (GRAPHICS_VER(m->i915) <= 6) | 
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| 456 | return; | 
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| 457 |  | 
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| 458 | for_each_ss_steering(iter, ee->engine->gt, slice, subslice) | 
|---|
| 459 | err_printf(m, "  SAMPLER_INSTDONE[%d][%d]: 0x%08x\n", | 
|---|
| 460 | slice, subslice, | 
|---|
| 461 | ee->instdone.sampler[slice][subslice]); | 
|---|
| 462 |  | 
|---|
| 463 | for_each_ss_steering(iter, ee->engine->gt, slice, subslice) | 
|---|
| 464 | err_printf(m, "  ROW_INSTDONE[%d][%d]: 0x%08x\n", | 
|---|
| 465 | slice, subslice, | 
|---|
| 466 | ee->instdone.row[slice][subslice]); | 
|---|
| 467 |  | 
|---|
| 468 | if (GRAPHICS_VER(m->i915) < 12) | 
|---|
| 469 | return; | 
|---|
| 470 |  | 
|---|
| 471 | if (GRAPHICS_VER_FULL(m->i915) >= IP_VER(12, 55)) { | 
|---|
| 472 | for_each_ss_steering(iter, ee->engine->gt, slice, subslice) | 
|---|
| 473 | err_printf(m, "  GEOM_SVGUNIT_INSTDONE[%d][%d]: 0x%08x\n", | 
|---|
| 474 | slice, subslice, | 
|---|
| 475 | ee->instdone.geom_svg[slice][subslice]); | 
|---|
| 476 | } | 
|---|
| 477 |  | 
|---|
| 478 | err_printf(m, "  SC_INSTDONE_EXTRA: 0x%08x\n", | 
|---|
| 479 | ee->instdone.slice_common_extra[0]); | 
|---|
| 480 | err_printf(m, "  SC_INSTDONE_EXTRA2: 0x%08x\n", | 
|---|
| 481 | ee->instdone.slice_common_extra[1]); | 
|---|
| 482 | } | 
|---|
| 483 |  | 
|---|
| 484 | static void error_print_request(struct drm_i915_error_state_buf *m, | 
|---|
| 485 | const char *prefix, | 
|---|
| 486 | const struct i915_request_coredump *erq) | 
|---|
| 487 | { | 
|---|
| 488 | if (!erq->seqno) | 
|---|
| 489 | return; | 
|---|
| 490 |  | 
|---|
| 491 | err_printf(m, "%s pid %d, seqno %8x:%08x%s%s, prio %d, head %08x, tail %08x\n", | 
|---|
| 492 | prefix, erq->pid, erq->context, erq->seqno, | 
|---|
| 493 | test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, | 
|---|
| 494 | &erq->flags) ? "!": "", | 
|---|
| 495 | test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, | 
|---|
| 496 | &erq->flags) ? "+": "", | 
|---|
| 497 | erq->sched_attr.priority, | 
|---|
| 498 | erq->head, erq->tail); | 
|---|
| 499 | } | 
|---|
| 500 |  | 
|---|
| 501 | static void error_print_context(struct drm_i915_error_state_buf *m, | 
|---|
| 502 | const char *, | 
|---|
| 503 | const struct i915_gem_context_coredump *ctx) | 
|---|
| 504 | { | 
|---|
| 505 | err_printf(m, "%s%s[%d] prio %d, guilty %d active %d, runtime total %lluns, avg %lluns\n", | 
|---|
| 506 | header, ctx->comm, ctx->pid, ctx->sched_attr.priority, | 
|---|
| 507 | ctx->guilty, ctx->active, | 
|---|
| 508 | ctx->total_runtime, ctx->avg_runtime); | 
|---|
| 509 | err_printf(m, "  context timeline seqno %u\n", ctx->hwsp_seqno); | 
|---|
| 510 | } | 
|---|
| 511 |  | 
|---|
| 512 | static struct i915_vma_coredump * | 
|---|
| 513 | __find_vma(struct i915_vma_coredump *vma, const char *name) | 
|---|
| 514 | { | 
|---|
| 515 | while (vma) { | 
|---|
| 516 | if (strcmp(vma->name, name) == 0) | 
|---|
| 517 | return vma; | 
|---|
| 518 | vma = vma->next; | 
|---|
| 519 | } | 
|---|
| 520 |  | 
|---|
| 521 | return NULL; | 
|---|
| 522 | } | 
|---|
| 523 |  | 
|---|
| 524 | static struct i915_vma_coredump * | 
|---|
| 525 | intel_gpu_error_find_batch(const struct intel_engine_coredump *ee) | 
|---|
| 526 | { | 
|---|
| 527 | return __find_vma(vma: ee->vma, name: "batch"); | 
|---|
| 528 | } | 
|---|
| 529 |  | 
|---|
| 530 | static void error_print_engine(struct drm_i915_error_state_buf *m, | 
|---|
| 531 | const struct intel_engine_coredump *ee) | 
|---|
| 532 | { | 
|---|
| 533 | struct i915_vma_coredump *batch; | 
|---|
| 534 | int n; | 
|---|
| 535 |  | 
|---|
| 536 | err_printf(m, "%s command stream:\n", ee->engine->name); | 
|---|
| 537 | err_printf(m, "  CCID:  0x%08x\n", ee->ccid); | 
|---|
| 538 | err_printf(m, "  START: 0x%08x\n", ee->start); | 
|---|
| 539 | err_printf(m, "  HEAD:  0x%08x [0x%08x]\n", ee->head, ee->rq_head); | 
|---|
| 540 | err_printf(m, "  TAIL:  0x%08x [0x%08x, 0x%08x]\n", | 
|---|
| 541 | ee->tail, ee->rq_post, ee->rq_tail); | 
|---|
| 542 | err_printf(m, "  CTL:   0x%08x\n", ee->ctl); | 
|---|
| 543 | err_printf(m, "  MODE:  0x%08x\n", ee->mode); | 
|---|
| 544 | err_printf(m, "  HWS:   0x%08x\n", ee->hws); | 
|---|
| 545 | err_printf(m, "  ACTHD: 0x%08x %08x\n", | 
|---|
| 546 | (u32)(ee->acthd>>32), (u32)ee->acthd); | 
|---|
| 547 | err_printf(m, "  IPEIR: 0x%08x\n", ee->ipeir); | 
|---|
| 548 | err_printf(m, "  IPEHR: 0x%08x\n", ee->ipehr); | 
|---|
| 549 | err_printf(m, "  ESR:   0x%08x\n", ee->esr); | 
|---|
| 550 |  | 
|---|
| 551 | error_print_instdone(m, ee); | 
|---|
| 552 |  | 
|---|
| 553 | batch = intel_gpu_error_find_batch(ee); | 
|---|
| 554 | if (batch) { | 
|---|
| 555 | u64 start = batch->gtt_offset; | 
|---|
| 556 | u64 end = start + batch->gtt_size; | 
|---|
| 557 |  | 
|---|
| 558 | err_printf(m, "  batch: [0x%08x_%08x, 0x%08x_%08x]\n", | 
|---|
| 559 | upper_32_bits(start), lower_32_bits(start), | 
|---|
| 560 | upper_32_bits(end), lower_32_bits(end)); | 
|---|
| 561 | } | 
|---|
| 562 | if (GRAPHICS_VER(m->i915) >= 4) { | 
|---|
| 563 | err_printf(m, "  BBADDR: 0x%08x_%08x\n", | 
|---|
| 564 | (u32)(ee->bbaddr>>32), (u32)ee->bbaddr); | 
|---|
| 565 | err_printf(m, "  BB_STATE: 0x%08x\n", ee->bbstate); | 
|---|
| 566 | err_printf(m, "  INSTPS: 0x%08x\n", ee->instps); | 
|---|
| 567 | } | 
|---|
| 568 | err_printf(m, "  INSTPM: 0x%08x\n", ee->instpm); | 
|---|
| 569 | err_printf(m, "  FADDR: 0x%08x %08x\n", upper_32_bits(ee->faddr), | 
|---|
| 570 | lower_32_bits(ee->faddr)); | 
|---|
| 571 | if (GRAPHICS_VER(m->i915) >= 6) { | 
|---|
| 572 | err_printf(m, "  RC PSMI: 0x%08x\n", ee->rc_psmi); | 
|---|
| 573 | err_printf(m, "  FAULT_REG: 0x%08x\n", ee->fault_reg); | 
|---|
| 574 | } | 
|---|
| 575 | if (GRAPHICS_VER(m->i915) >= 11) { | 
|---|
| 576 | err_printf(m, "  NOPID: 0x%08x\n", ee->nopid); | 
|---|
| 577 | err_printf(m, "  EXCC: 0x%08x\n", ee->excc); | 
|---|
| 578 | err_printf(m, "  CMD_CCTL: 0x%08x\n", ee->cmd_cctl); | 
|---|
| 579 | err_printf(m, "  CSCMDOP: 0x%08x\n", ee->cscmdop); | 
|---|
| 580 | err_printf(m, "  CTX_SR_CTL: 0x%08x\n", ee->ctx_sr_ctl); | 
|---|
| 581 | err_printf(m, "  DMA_FADDR_HI: 0x%08x\n", ee->dma_faddr_hi); | 
|---|
| 582 | err_printf(m, "  DMA_FADDR_LO: 0x%08x\n", ee->dma_faddr_lo); | 
|---|
| 583 | } | 
|---|
| 584 | if (HAS_PPGTT(m->i915)) { | 
|---|
| 585 | err_printf(m, "  GFX_MODE: 0x%08x\n", ee->vm_info.gfx_mode); | 
|---|
| 586 |  | 
|---|
| 587 | if (GRAPHICS_VER(m->i915) >= 8) { | 
|---|
| 588 | int i; | 
|---|
| 589 | for (i = 0; i < 4; i++) | 
|---|
| 590 | err_printf(m, "  PDP%d: 0x%016llx\n", | 
|---|
| 591 | i, ee->vm_info.pdp[i]); | 
|---|
| 592 | } else { | 
|---|
| 593 | err_printf(m, "  PP_DIR_BASE: 0x%08x\n", | 
|---|
| 594 | ee->vm_info.pp_dir_base); | 
|---|
| 595 | } | 
|---|
| 596 | } | 
|---|
| 597 |  | 
|---|
| 598 | for (n = 0; n < ee->num_ports; n++) { | 
|---|
| 599 | err_printf(m, "  ELSP[%d]:", n); | 
|---|
| 600 | error_print_request(m, prefix: " ", erq: &ee->execlist[n]); | 
|---|
| 601 | } | 
|---|
| 602 | } | 
|---|
| 603 |  | 
|---|
| 604 | void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...) | 
|---|
| 605 | { | 
|---|
| 606 | va_list args; | 
|---|
| 607 |  | 
|---|
| 608 | va_start(args, f); | 
|---|
| 609 | i915_error_vprintf(e, fmt: f, args); | 
|---|
| 610 | va_end(args); | 
|---|
| 611 | } | 
|---|
| 612 |  | 
|---|
| 613 | static void intel_gpu_error_print_vma(struct drm_i915_error_state_buf *m, | 
|---|
| 614 | const struct intel_engine_cs *engine, | 
|---|
| 615 | const struct i915_vma_coredump *vma) | 
|---|
| 616 | { | 
|---|
| 617 | char out[ASCII85_BUFSZ]; | 
|---|
| 618 | struct page *page; | 
|---|
| 619 |  | 
|---|
| 620 | if (!vma) | 
|---|
| 621 | return; | 
|---|
| 622 |  | 
|---|
| 623 | err_printf(m, "%s --- %s = 0x%08x %08x\n", | 
|---|
| 624 | engine ? engine->name : "global", vma->name, | 
|---|
| 625 | upper_32_bits(vma->gtt_offset), | 
|---|
| 626 | lower_32_bits(vma->gtt_offset)); | 
|---|
| 627 |  | 
|---|
| 628 | if (vma->gtt_page_sizes > I915_GTT_PAGE_SIZE_4K) | 
|---|
| 629 | err_printf(m, "gtt_page_sizes = 0x%08x\n", vma->gtt_page_sizes); | 
|---|
| 630 |  | 
|---|
| 631 | err_compression_marker(m); | 
|---|
| 632 | list_for_each_entry(page, &vma->page_list, lru) { | 
|---|
| 633 | int i, len; | 
|---|
| 634 | const u32 *addr = page_address(page); | 
|---|
| 635 |  | 
|---|
| 636 | len = PAGE_SIZE; | 
|---|
| 637 | if (page == list_last_entry(&vma->page_list, typeof(*page), lru)) | 
|---|
| 638 | len -= vma->unused; | 
|---|
| 639 | len = ascii85_encode_len(len); | 
|---|
| 640 |  | 
|---|
| 641 | for (i = 0; i < len; i++) | 
|---|
| 642 | err_puts(m, ascii85_encode(addr[i], out)); | 
|---|
| 643 | } | 
|---|
| 644 | err_puts(m, "\n"); | 
|---|
| 645 | } | 
|---|
| 646 |  | 
|---|
| 647 | static void err_print_capabilities(struct drm_i915_error_state_buf *m, | 
|---|
| 648 | struct i915_gpu_coredump *error) | 
|---|
| 649 | { | 
|---|
| 650 | struct drm_printer p = i915_error_printer(e: m); | 
|---|
| 651 |  | 
|---|
| 652 | intel_device_info_print(info: &error->device_info, runtime: &error->runtime_info, p: &p); | 
|---|
| 653 | intel_driver_caps_print(caps: &error->driver_caps, p: &p); | 
|---|
| 654 | } | 
|---|
| 655 |  | 
|---|
| 656 | static void err_print_params(struct drm_i915_error_state_buf *m, | 
|---|
| 657 | const struct i915_params *params) | 
|---|
| 658 | { | 
|---|
| 659 | struct drm_printer p = i915_error_printer(e: m); | 
|---|
| 660 |  | 
|---|
| 661 | i915_params_dump(params, p: &p); | 
|---|
| 662 | } | 
|---|
| 663 |  | 
|---|
| 664 | static void err_print_pciid(struct drm_i915_error_state_buf *m, | 
|---|
| 665 | struct drm_i915_private *i915) | 
|---|
| 666 | { | 
|---|
| 667 | struct pci_dev *pdev = to_pci_dev(i915->drm.dev); | 
|---|
| 668 |  | 
|---|
| 669 | err_printf(m, "PCI ID: 0x%04x\n", pdev->device); | 
|---|
| 670 | err_printf(m, "PCI Revision: 0x%02x\n", pdev->revision); | 
|---|
| 671 | err_printf(m, "PCI Subsystem: %04x:%04x\n", | 
|---|
| 672 | pdev->subsystem_vendor, | 
|---|
| 673 | pdev->subsystem_device); | 
|---|
| 674 | } | 
|---|
| 675 |  | 
|---|
| 676 | static void err_print_guc_ctb(struct drm_i915_error_state_buf *m, | 
|---|
| 677 | const char *name, | 
|---|
| 678 | const struct intel_ctb_coredump *ctb) | 
|---|
| 679 | { | 
|---|
| 680 | if (!ctb->size) | 
|---|
| 681 | return; | 
|---|
| 682 |  | 
|---|
| 683 | err_printf(m, "GuC %s CTB: raw: 0x%08X, 0x%08X/%08X, cached: 0x%08X/%08X, desc = 0x%08X, buf = 0x%08X x 0x%08X\n", | 
|---|
| 684 | name, ctb->raw_status, ctb->raw_head, ctb->raw_tail, | 
|---|
| 685 | ctb->head, ctb->tail, ctb->desc_offset, ctb->cmds_offset, ctb->size); | 
|---|
| 686 | } | 
|---|
| 687 |  | 
|---|
| 688 | /* This list includes registers that are useful in debugging GuC hangs. */ | 
|---|
| 689 | const struct { | 
|---|
| 690 | u32 start; | 
|---|
| 691 | u32 count; | 
|---|
| 692 | } guc_hw_reg_state[] = { | 
|---|
| 693 | { 0xc0b0, 2 }, | 
|---|
| 694 | { 0xc000, 65 }, | 
|---|
| 695 | { 0xc140, 1 }, | 
|---|
| 696 | { 0xc180, 16 }, | 
|---|
| 697 | { 0xc1dc, 10 }, | 
|---|
| 698 | { 0xc300, 79 }, | 
|---|
| 699 | { 0xc4b4, 47 }, | 
|---|
| 700 | { 0xc574, 1 }, | 
|---|
| 701 | { 0xc57c, 1 }, | 
|---|
| 702 | { 0xc584, 11 }, | 
|---|
| 703 | { 0xc5c0, 8 }, | 
|---|
| 704 | { 0xc5e4, 1 }, | 
|---|
| 705 | { 0xc5ec, 103 }, | 
|---|
| 706 | { 0xc7c0, 1 }, | 
|---|
| 707 | { 0xc0b0, 2 } | 
|---|
| 708 | }; | 
|---|
| 709 |  | 
|---|
| 710 | static u32 print_range_line(struct drm_i915_error_state_buf *m, u32 start, u32 *dump, u32 count) | 
|---|
| 711 | { | 
|---|
| 712 | if (count >= 8) { | 
|---|
| 713 | err_printf(m, "[0x%04x] 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n", | 
|---|
| 714 | start, dump[0], dump[1], dump[2], dump[3], | 
|---|
| 715 | dump[4], dump[5], dump[6], dump[7]); | 
|---|
| 716 | return 8; | 
|---|
| 717 | } else if (count >= 4) { | 
|---|
| 718 | err_printf(m, "[0x%04x] 0x%08x 0x%08x 0x%08x 0x%08x\n", | 
|---|
| 719 | start, dump[0], dump[1], dump[2], dump[3]); | 
|---|
| 720 | return 4; | 
|---|
| 721 | } else if (count >= 2) { | 
|---|
| 722 | err_printf(m, "[0x%04x] 0x%08x 0x%08x\n", start, dump[0], dump[1]); | 
|---|
| 723 | return 2; | 
|---|
| 724 | } | 
|---|
| 725 |  | 
|---|
| 726 | err_printf(m, "[0x%04x] 0x%08x\n", start, dump[0]); | 
|---|
| 727 | return 1; | 
|---|
| 728 | } | 
|---|
| 729 |  | 
|---|
| 730 | static void err_print_guc_hw_state(struct drm_i915_error_state_buf *m, u32 *hw_state) | 
|---|
| 731 | { | 
|---|
| 732 | u32 total = 0; | 
|---|
| 733 | int i; | 
|---|
| 734 |  | 
|---|
| 735 | if (!hw_state) | 
|---|
| 736 | return; | 
|---|
| 737 |  | 
|---|
| 738 | err_printf(m, "GuC Register State:\n"); | 
|---|
| 739 |  | 
|---|
| 740 | for (i = 0; i < ARRAY_SIZE(guc_hw_reg_state); i++) { | 
|---|
| 741 | u32 entry = 0; | 
|---|
| 742 |  | 
|---|
| 743 | while (entry < guc_hw_reg_state[i].count) { | 
|---|
| 744 | u32 start = guc_hw_reg_state[i].start + entry * sizeof(u32); | 
|---|
| 745 | u32 count = guc_hw_reg_state[i].count - entry; | 
|---|
| 746 | u32 *values = hw_state + total + entry; | 
|---|
| 747 |  | 
|---|
| 748 | entry += print_range_line(m, start, dump: values, count); | 
|---|
| 749 | } | 
|---|
| 750 |  | 
|---|
| 751 | GEM_BUG_ON(entry != guc_hw_reg_state[i].count); | 
|---|
| 752 | total += entry; | 
|---|
| 753 | } | 
|---|
| 754 | } | 
|---|
| 755 |  | 
|---|
| 756 | static void err_print_uc(struct drm_i915_error_state_buf *m, | 
|---|
| 757 | const struct intel_uc_coredump *error_uc) | 
|---|
| 758 | { | 
|---|
| 759 | struct drm_printer p = i915_error_printer(e: m); | 
|---|
| 760 |  | 
|---|
| 761 | intel_uc_fw_dump(uc_fw: &error_uc->guc_fw, p: &p); | 
|---|
| 762 | intel_uc_fw_dump(uc_fw: &error_uc->huc_fw, p: &p); | 
|---|
| 763 | err_printf(m, "GuC timestamp: 0x%08x\n", error_uc->guc.timestamp); | 
|---|
| 764 | err_print_guc_hw_state(m, hw_state: error_uc->guc.hw_state); | 
|---|
| 765 | intel_gpu_error_print_vma(m, NULL, vma: error_uc->guc.vma_log); | 
|---|
| 766 | err_printf(m, "GuC CTB fence: %d\n", error_uc->guc.last_fence); | 
|---|
| 767 | err_print_guc_ctb(m, name: "Send", ctb: error_uc->guc.ctb + 0); | 
|---|
| 768 | err_print_guc_ctb(m, name: "Recv", ctb: error_uc->guc.ctb + 1); | 
|---|
| 769 | intel_gpu_error_print_vma(m, NULL, vma: error_uc->guc.vma_ctb); | 
|---|
| 770 | } | 
|---|
| 771 |  | 
|---|
| 772 | static void err_free_sgl(struct scatterlist *sgl) | 
|---|
| 773 | { | 
|---|
| 774 | while (sgl) { | 
|---|
| 775 | struct scatterlist *sg; | 
|---|
| 776 |  | 
|---|
| 777 | for (sg = sgl; !sg_is_chain(sg); sg++) { | 
|---|
| 778 | kfree(objp: sg_virt(sg)); | 
|---|
| 779 | if (sg_is_last(sg)) | 
|---|
| 780 | break; | 
|---|
| 781 | } | 
|---|
| 782 |  | 
|---|
| 783 | sg = sg_is_last(sg) ? NULL : sg_chain_ptr(sg); | 
|---|
| 784 | free_page((unsigned long)sgl); | 
|---|
| 785 | sgl = sg; | 
|---|
| 786 | } | 
|---|
| 787 | } | 
|---|
| 788 |  | 
|---|
| 789 | static void err_print_gt_info(struct drm_i915_error_state_buf *m, | 
|---|
| 790 | struct intel_gt_coredump *gt) | 
|---|
| 791 | { | 
|---|
| 792 | struct drm_printer p = i915_error_printer(e: m); | 
|---|
| 793 |  | 
|---|
| 794 | intel_gt_info_print(info: >->info, p: &p); | 
|---|
| 795 | intel_sseu_print_topology(i915: gt->_gt->i915, sseu: >->info.sseu, p: &p); | 
|---|
| 796 | } | 
|---|
| 797 |  | 
|---|
| 798 | static void err_print_gt_global_nonguc(struct drm_i915_error_state_buf *m, | 
|---|
| 799 | struct intel_gt_coredump *gt) | 
|---|
| 800 | { | 
|---|
| 801 | int i; | 
|---|
| 802 |  | 
|---|
| 803 | err_printf(m, "GT awake: %s\n", str_yes_no(gt->awake)); | 
|---|
| 804 | err_printf(m, "CS timestamp frequency: %u Hz, %d ns\n", | 
|---|
| 805 | gt->clock_frequency, gt->clock_period_ns); | 
|---|
| 806 | err_printf(m, "EIR: 0x%08x\n", gt->eir); | 
|---|
| 807 | err_printf(m, "PGTBL_ER: 0x%08x\n", gt->pgtbl_er); | 
|---|
| 808 |  | 
|---|
| 809 | for (i = 0; i < gt->ngtier; i++) | 
|---|
| 810 | err_printf(m, "GTIER[%d]: 0x%08x\n", i, gt->gtier[i]); | 
|---|
| 811 | } | 
|---|
| 812 |  | 
|---|
| 813 | static void err_print_gt_global(struct drm_i915_error_state_buf *m, | 
|---|
| 814 | struct intel_gt_coredump *gt) | 
|---|
| 815 | { | 
|---|
| 816 | err_printf(m, "FORCEWAKE: 0x%08x\n", gt->forcewake); | 
|---|
| 817 |  | 
|---|
| 818 | if (IS_GRAPHICS_VER(m->i915, 6, 11)) { | 
|---|
| 819 | err_printf(m, "ERROR: 0x%08x\n", gt->error); | 
|---|
| 820 | err_printf(m, "DONE_REG: 0x%08x\n", gt->done_reg); | 
|---|
| 821 | } | 
|---|
| 822 |  | 
|---|
| 823 | if (GRAPHICS_VER(m->i915) >= 8) | 
|---|
| 824 | err_printf(m, "FAULT_TLB_DATA: 0x%08x 0x%08x\n", | 
|---|
| 825 | gt->fault_data1, gt->fault_data0); | 
|---|
| 826 |  | 
|---|
| 827 | if (GRAPHICS_VER(m->i915) == 7) | 
|---|
| 828 | err_printf(m, "ERR_INT: 0x%08x\n", gt->err_int); | 
|---|
| 829 |  | 
|---|
| 830 | if (IS_GRAPHICS_VER(m->i915, 8, 11)) | 
|---|
| 831 | err_printf(m, "GTT_CACHE_EN: 0x%08x\n", gt->gtt_cache); | 
|---|
| 832 |  | 
|---|
| 833 | if (GRAPHICS_VER(m->i915) == 12) | 
|---|
| 834 | err_printf(m, "AUX_ERR_DBG: 0x%08x\n", gt->aux_err); | 
|---|
| 835 |  | 
|---|
| 836 | if (GRAPHICS_VER(m->i915) >= 12) { | 
|---|
| 837 | int i; | 
|---|
| 838 |  | 
|---|
| 839 | for (i = 0; i < I915_MAX_SFC; i++) { | 
|---|
| 840 | /* | 
|---|
| 841 | * SFC_DONE resides in the VD forcewake domain, so it | 
|---|
| 842 | * only exists if the corresponding VCS engine is | 
|---|
| 843 | * present. | 
|---|
| 844 | */ | 
|---|
| 845 | if ((gt->_gt->info.sfc_mask & BIT(i)) == 0 || | 
|---|
| 846 | !HAS_ENGINE(gt->_gt, _VCS(i * 2))) | 
|---|
| 847 | continue; | 
|---|
| 848 |  | 
|---|
| 849 | err_printf(m, "  SFC_DONE[%d]: 0x%08x\n", i, | 
|---|
| 850 | gt->sfc_done[i]); | 
|---|
| 851 | } | 
|---|
| 852 |  | 
|---|
| 853 | err_printf(m, "  GAM_DONE: 0x%08x\n", gt->gam_done); | 
|---|
| 854 | } | 
|---|
| 855 | } | 
|---|
| 856 |  | 
|---|
| 857 | static void err_print_gt_fences(struct drm_i915_error_state_buf *m, | 
|---|
| 858 | struct intel_gt_coredump *gt) | 
|---|
| 859 | { | 
|---|
| 860 | int i; | 
|---|
| 861 |  | 
|---|
| 862 | for (i = 0; i < gt->nfence; i++) | 
|---|
| 863 | err_printf(m, "  fence[%d] = %08llx\n", i, gt->fence[i]); | 
|---|
| 864 | } | 
|---|
| 865 |  | 
|---|
| 866 | static void err_print_gt_engines(struct drm_i915_error_state_buf *m, | 
|---|
| 867 | struct intel_gt_coredump *gt) | 
|---|
| 868 | { | 
|---|
| 869 | const struct intel_engine_coredump *ee; | 
|---|
| 870 |  | 
|---|
| 871 | for (ee = gt->engine; ee; ee = ee->next) { | 
|---|
| 872 | const struct i915_vma_coredump *vma; | 
|---|
| 873 |  | 
|---|
| 874 | if (gt->uc && gt->uc->guc.is_guc_capture) { | 
|---|
| 875 | if (ee->guc_capture_node) | 
|---|
| 876 | intel_guc_capture_print_engine_node(m, ee); | 
|---|
| 877 | else | 
|---|
| 878 | err_printf(m, "  Missing GuC capture node for %s\n", | 
|---|
| 879 | ee->engine->name); | 
|---|
| 880 | } else { | 
|---|
| 881 | error_print_engine(m, ee); | 
|---|
| 882 | } | 
|---|
| 883 |  | 
|---|
| 884 | err_printf(m, "  hung: %u\n", ee->hung); | 
|---|
| 885 | err_printf(m, "  engine reset count: %u\n", ee->reset_count); | 
|---|
| 886 | error_print_context(m, header: "  Active context: ", ctx: &ee->context); | 
|---|
| 887 |  | 
|---|
| 888 | for (vma = ee->vma; vma; vma = vma->next) | 
|---|
| 889 | intel_gpu_error_print_vma(m, engine: ee->engine, vma); | 
|---|
| 890 | } | 
|---|
| 891 |  | 
|---|
| 892 | } | 
|---|
| 893 |  | 
|---|
| 894 | static void __err_print_to_sgl(struct drm_i915_error_state_buf *m, | 
|---|
| 895 | struct i915_gpu_coredump *error) | 
|---|
| 896 | { | 
|---|
| 897 | struct drm_printer p = i915_error_printer(e: m); | 
|---|
| 898 | const struct intel_engine_coredump *ee; | 
|---|
| 899 | struct timespec64 ts; | 
|---|
| 900 |  | 
|---|
| 901 | if (*error->error_msg) | 
|---|
| 902 | err_printf(m, "%s\n", error->error_msg); | 
|---|
| 903 | err_printf(m, "Kernel: %s %s\n", | 
|---|
| 904 | init_utsname()->release, | 
|---|
| 905 | init_utsname()->machine); | 
|---|
| 906 | ts = ktime_to_timespec64(error->time); | 
|---|
| 907 | err_printf(m, "Time: %lld s %ld us\n", | 
|---|
| 908 | (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC); | 
|---|
| 909 | ts = ktime_to_timespec64(error->boottime); | 
|---|
| 910 | err_printf(m, "Boottime: %lld s %ld us\n", | 
|---|
| 911 | (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC); | 
|---|
| 912 | ts = ktime_to_timespec64(error->uptime); | 
|---|
| 913 | err_printf(m, "Uptime: %lld s %ld us\n", | 
|---|
| 914 | (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC); | 
|---|
| 915 | err_printf(m, "Capture: %lu jiffies; %d ms ago\n", | 
|---|
| 916 | error->capture, jiffies_to_msecs(jiffies - error->capture)); | 
|---|
| 917 |  | 
|---|
| 918 | for (ee = error->gt ? error->gt->engine : NULL; ee; ee = ee->next) | 
|---|
| 919 | err_printf(m, "Active process (on ring %s): %s [%d]\n", | 
|---|
| 920 | ee->engine->name, | 
|---|
| 921 | ee->context.comm, | 
|---|
| 922 | ee->context.pid); | 
|---|
| 923 |  | 
|---|
| 924 | err_printf(m, "Reset count: %u\n", error->reset_count); | 
|---|
| 925 | err_printf(m, "Suspend count: %u\n", error->suspend_count); | 
|---|
| 926 | err_printf(m, "Platform: %s\n", intel_platform_name(error->device_info.platform)); | 
|---|
| 927 | err_printf(m, "Subplatform: 0x%x\n", | 
|---|
| 928 | intel_subplatform(&error->runtime_info, | 
|---|
| 929 | error->device_info.platform)); | 
|---|
| 930 | err_print_pciid(m, i915: m->i915); | 
|---|
| 931 |  | 
|---|
| 932 | err_printf(m, "IOMMU enabled?: %d\n", error->iommu); | 
|---|
| 933 |  | 
|---|
| 934 | err_printf(m, "RPM wakelock: %s\n", str_yes_no(error->wakelock)); | 
|---|
| 935 | err_printf(m, "PM suspended: %s\n", str_yes_no(error->suspended)); | 
|---|
| 936 |  | 
|---|
| 937 | if (error->gt) { | 
|---|
| 938 | bool print_guc_capture = false; | 
|---|
| 939 |  | 
|---|
| 940 | if (error->gt->uc && error->gt->uc->guc.is_guc_capture) | 
|---|
| 941 | print_guc_capture = true; | 
|---|
| 942 |  | 
|---|
| 943 | err_print_gt_global_nonguc(m, gt: error->gt); | 
|---|
| 944 | err_print_gt_fences(m, gt: error->gt); | 
|---|
| 945 |  | 
|---|
| 946 | /* | 
|---|
| 947 | * GuC dumped global, eng-class and eng-instance registers together | 
|---|
| 948 | * as part of engine state dump so we print in err_print_gt_engines | 
|---|
| 949 | */ | 
|---|
| 950 | if (!print_guc_capture) | 
|---|
| 951 | err_print_gt_global(m, gt: error->gt); | 
|---|
| 952 |  | 
|---|
| 953 | err_print_gt_engines(m, gt: error->gt); | 
|---|
| 954 |  | 
|---|
| 955 | if (error->gt->uc) | 
|---|
| 956 | err_print_uc(m, error_uc: error->gt->uc); | 
|---|
| 957 |  | 
|---|
| 958 | err_print_gt_info(m, gt: error->gt); | 
|---|
| 959 | } | 
|---|
| 960 |  | 
|---|
| 961 | err_print_capabilities(m, error); | 
|---|
| 962 | err_print_params(m, params: &error->params); | 
|---|
| 963 |  | 
|---|
| 964 | intel_display_snapshot_print(snapshot: error->display_snapshot, p: &p); | 
|---|
| 965 | } | 
|---|
| 966 |  | 
|---|
| 967 | static int err_print_to_sgl(struct i915_gpu_coredump *error) | 
|---|
| 968 | { | 
|---|
| 969 | struct drm_i915_error_state_buf m; | 
|---|
| 970 |  | 
|---|
| 971 | if (IS_ERR(ptr: error)) | 
|---|
| 972 | return PTR_ERR(ptr: error); | 
|---|
| 973 |  | 
|---|
| 974 | if (READ_ONCE(error->sgl)) | 
|---|
| 975 | return 0; | 
|---|
| 976 |  | 
|---|
| 977 | memset(s: &m, c: 0, n: sizeof(m)); | 
|---|
| 978 | m.i915 = error->i915; | 
|---|
| 979 |  | 
|---|
| 980 | __err_print_to_sgl(m: &m, error); | 
|---|
| 981 |  | 
|---|
| 982 | if (m.buf) { | 
|---|
| 983 | __sg_set_buf(sg: m.cur++, addr: m.buf, len: m.bytes, it: m.iter); | 
|---|
| 984 | m.bytes = 0; | 
|---|
| 985 | m.buf = NULL; | 
|---|
| 986 | } | 
|---|
| 987 | if (m.cur) { | 
|---|
| 988 | GEM_BUG_ON(m.end < m.cur); | 
|---|
| 989 | sg_mark_end(sg: m.cur - 1); | 
|---|
| 990 | } | 
|---|
| 991 | GEM_BUG_ON(m.sgl && !m.cur); | 
|---|
| 992 |  | 
|---|
| 993 | if (m.err) { | 
|---|
| 994 | err_free_sgl(sgl: m.sgl); | 
|---|
| 995 | return m.err; | 
|---|
| 996 | } | 
|---|
| 997 |  | 
|---|
| 998 | if (cmpxchg(&error->sgl, NULL, m.sgl)) | 
|---|
| 999 | err_free_sgl(sgl: m.sgl); | 
|---|
| 1000 |  | 
|---|
| 1001 | return 0; | 
|---|
| 1002 | } | 
|---|
| 1003 |  | 
|---|
| 1004 | ssize_t i915_gpu_coredump_copy_to_buffer(struct i915_gpu_coredump *error, | 
|---|
| 1005 | char *buf, loff_t off, size_t rem) | 
|---|
| 1006 | { | 
|---|
| 1007 | struct scatterlist *sg; | 
|---|
| 1008 | size_t count; | 
|---|
| 1009 | loff_t pos; | 
|---|
| 1010 | int err; | 
|---|
| 1011 |  | 
|---|
| 1012 | if (!error || !rem) | 
|---|
| 1013 | return 0; | 
|---|
| 1014 |  | 
|---|
| 1015 | err = err_print_to_sgl(error); | 
|---|
| 1016 | if (err) | 
|---|
| 1017 | return err; | 
|---|
| 1018 |  | 
|---|
| 1019 | sg = READ_ONCE(error->fit); | 
|---|
| 1020 | if (!sg || off < sg->dma_address) | 
|---|
| 1021 | sg = error->sgl; | 
|---|
| 1022 | if (!sg) | 
|---|
| 1023 | return 0; | 
|---|
| 1024 |  | 
|---|
| 1025 | pos = sg->dma_address; | 
|---|
| 1026 | count = 0; | 
|---|
| 1027 | do { | 
|---|
| 1028 | size_t len, start; | 
|---|
| 1029 |  | 
|---|
| 1030 | if (sg_is_chain(sg)) { | 
|---|
| 1031 | sg = sg_chain_ptr(sg); | 
|---|
| 1032 | GEM_BUG_ON(sg_is_chain(sg)); | 
|---|
| 1033 | } | 
|---|
| 1034 |  | 
|---|
| 1035 | len = sg->length; | 
|---|
| 1036 | if (pos + len <= off) { | 
|---|
| 1037 | pos += len; | 
|---|
| 1038 | continue; | 
|---|
| 1039 | } | 
|---|
| 1040 |  | 
|---|
| 1041 | start = sg->offset; | 
|---|
| 1042 | if (pos < off) { | 
|---|
| 1043 | GEM_BUG_ON(off - pos > len); | 
|---|
| 1044 | len -= off - pos; | 
|---|
| 1045 | start += off - pos; | 
|---|
| 1046 | pos = off; | 
|---|
| 1047 | } | 
|---|
| 1048 |  | 
|---|
| 1049 | len = min(len, rem); | 
|---|
| 1050 | GEM_BUG_ON(!len || len > sg->length); | 
|---|
| 1051 |  | 
|---|
| 1052 | memcpy(to: buf, page_address(sg_page(sg)) + start, len); | 
|---|
| 1053 |  | 
|---|
| 1054 | count += len; | 
|---|
| 1055 | pos += len; | 
|---|
| 1056 |  | 
|---|
| 1057 | buf += len; | 
|---|
| 1058 | rem -= len; | 
|---|
| 1059 | if (!rem) { | 
|---|
| 1060 | WRITE_ONCE(error->fit, sg); | 
|---|
| 1061 | break; | 
|---|
| 1062 | } | 
|---|
| 1063 | } while (!sg_is_last(sg: sg++)); | 
|---|
| 1064 |  | 
|---|
| 1065 | return count; | 
|---|
| 1066 | } | 
|---|
| 1067 |  | 
|---|
| 1068 | static void i915_vma_coredump_free(struct i915_vma_coredump *vma) | 
|---|
| 1069 | { | 
|---|
| 1070 | while (vma) { | 
|---|
| 1071 | struct i915_vma_coredump *next = vma->next; | 
|---|
| 1072 | struct page *page, *n; | 
|---|
| 1073 |  | 
|---|
| 1074 | list_for_each_entry_safe(page, n, &vma->page_list, lru) { | 
|---|
| 1075 | list_del_init(entry: &page->lru); | 
|---|
| 1076 | __free_page(page); | 
|---|
| 1077 | } | 
|---|
| 1078 |  | 
|---|
| 1079 | kfree(objp: vma); | 
|---|
| 1080 | vma = next; | 
|---|
| 1081 | } | 
|---|
| 1082 | } | 
|---|
| 1083 |  | 
|---|
| 1084 | static void cleanup_params(struct i915_gpu_coredump *error) | 
|---|
| 1085 | { | 
|---|
| 1086 | i915_params_free(params: &error->params); | 
|---|
| 1087 | } | 
|---|
| 1088 |  | 
|---|
| 1089 | static void cleanup_uc(struct intel_uc_coredump *uc) | 
|---|
| 1090 | { | 
|---|
| 1091 | kfree(objp: uc->guc_fw.file_selected.path); | 
|---|
| 1092 | kfree(objp: uc->huc_fw.file_selected.path); | 
|---|
| 1093 | kfree(objp: uc->guc_fw.file_wanted.path); | 
|---|
| 1094 | kfree(objp: uc->huc_fw.file_wanted.path); | 
|---|
| 1095 | i915_vma_coredump_free(vma: uc->guc.vma_log); | 
|---|
| 1096 | i915_vma_coredump_free(vma: uc->guc.vma_ctb); | 
|---|
| 1097 | kfree(objp: uc->guc.hw_state); | 
|---|
| 1098 |  | 
|---|
| 1099 | kfree(objp: uc); | 
|---|
| 1100 | } | 
|---|
| 1101 |  | 
|---|
| 1102 | static void cleanup_gt(struct intel_gt_coredump *gt) | 
|---|
| 1103 | { | 
|---|
| 1104 | while (gt->engine) { | 
|---|
| 1105 | struct intel_engine_coredump *ee = gt->engine; | 
|---|
| 1106 |  | 
|---|
| 1107 | gt->engine = ee->next; | 
|---|
| 1108 |  | 
|---|
| 1109 | i915_vma_coredump_free(vma: ee->vma); | 
|---|
| 1110 | intel_guc_capture_free_node(ee); | 
|---|
| 1111 | kfree(objp: ee); | 
|---|
| 1112 | } | 
|---|
| 1113 |  | 
|---|
| 1114 | if (gt->uc) | 
|---|
| 1115 | cleanup_uc(uc: gt->uc); | 
|---|
| 1116 |  | 
|---|
| 1117 | kfree(objp: gt); | 
|---|
| 1118 | } | 
|---|
| 1119 |  | 
|---|
| 1120 | void __i915_gpu_coredump_free(struct kref *error_ref) | 
|---|
| 1121 | { | 
|---|
| 1122 | struct i915_gpu_coredump *error = | 
|---|
| 1123 | container_of(error_ref, typeof(*error), ref); | 
|---|
| 1124 |  | 
|---|
| 1125 | while (error->gt) { | 
|---|
| 1126 | struct intel_gt_coredump *gt = error->gt; | 
|---|
| 1127 |  | 
|---|
| 1128 | error->gt = gt->next; | 
|---|
| 1129 | cleanup_gt(gt); | 
|---|
| 1130 | } | 
|---|
| 1131 |  | 
|---|
| 1132 | intel_display_snapshot_free(snapshot: error->display_snapshot); | 
|---|
| 1133 |  | 
|---|
| 1134 | cleanup_params(error); | 
|---|
| 1135 |  | 
|---|
| 1136 | err_free_sgl(sgl: error->sgl); | 
|---|
| 1137 | kfree(objp: error); | 
|---|
| 1138 | } | 
|---|
| 1139 |  | 
|---|
| 1140 | static struct i915_vma_coredump * | 
|---|
| 1141 | i915_vma_coredump_create(const struct intel_gt *gt, | 
|---|
| 1142 | const struct i915_vma_resource *vma_res, | 
|---|
| 1143 | struct i915_vma_compress *compress, | 
|---|
| 1144 | const char *name) | 
|---|
| 1145 |  | 
|---|
| 1146 | { | 
|---|
| 1147 | struct i915_ggtt *ggtt = gt->ggtt; | 
|---|
| 1148 | const u64 slot = ggtt->error_capture.start; | 
|---|
| 1149 | struct i915_vma_coredump *dst; | 
|---|
| 1150 | struct sgt_iter iter; | 
|---|
| 1151 | int ret; | 
|---|
| 1152 |  | 
|---|
| 1153 | might_sleep(); | 
|---|
| 1154 |  | 
|---|
| 1155 | if (!vma_res || !vma_res->bi.pages || !compress) | 
|---|
| 1156 | return NULL; | 
|---|
| 1157 |  | 
|---|
| 1158 | dst = kmalloc(sizeof(*dst), ALLOW_FAIL); | 
|---|
| 1159 | if (!dst) | 
|---|
| 1160 | return NULL; | 
|---|
| 1161 |  | 
|---|
| 1162 | if (!compress_start(c: compress)) { | 
|---|
| 1163 | kfree(objp: dst); | 
|---|
| 1164 | return NULL; | 
|---|
| 1165 | } | 
|---|
| 1166 |  | 
|---|
| 1167 | INIT_LIST_HEAD(list: &dst->page_list); | 
|---|
| 1168 | strscpy(dst->name, name); | 
|---|
| 1169 | dst->next = NULL; | 
|---|
| 1170 |  | 
|---|
| 1171 | dst->gtt_offset = vma_res->start; | 
|---|
| 1172 | dst->gtt_size = vma_res->node_size; | 
|---|
| 1173 | dst->gtt_page_sizes = vma_res->page_sizes_gtt; | 
|---|
| 1174 | dst->unused = 0; | 
|---|
| 1175 |  | 
|---|
| 1176 | ret = -EINVAL; | 
|---|
| 1177 | if (drm_mm_node_allocated(node: &ggtt->error_capture)) { | 
|---|
| 1178 | void __iomem *s; | 
|---|
| 1179 | dma_addr_t dma; | 
|---|
| 1180 |  | 
|---|
| 1181 | for_each_sgt_daddr(dma, iter, vma_res->bi.pages) { | 
|---|
| 1182 | mutex_lock(lock: &ggtt->error_mutex); | 
|---|
| 1183 | if (ggtt->vm.raw_insert_page) | 
|---|
| 1184 | ggtt->vm.raw_insert_page(&ggtt->vm, dma, slot, | 
|---|
| 1185 | i915_gem_get_pat_index(i915: gt->i915, | 
|---|
| 1186 | level: I915_CACHE_NONE), | 
|---|
| 1187 | 0); | 
|---|
| 1188 | else | 
|---|
| 1189 | ggtt->vm.insert_page(&ggtt->vm, dma, slot, | 
|---|
| 1190 | i915_gem_get_pat_index(i915: gt->i915, | 
|---|
| 1191 | level: I915_CACHE_NONE), | 
|---|
| 1192 | 0); | 
|---|
| 1193 | mb(); | 
|---|
| 1194 |  | 
|---|
| 1195 | s = io_mapping_map_wc(mapping: &ggtt->iomap, offset: slot, PAGE_SIZE); | 
|---|
| 1196 | ret = compress_page(c: compress, | 
|---|
| 1197 | src: (void  __force *)s, dst, | 
|---|
| 1198 | wc: true); | 
|---|
| 1199 | io_mapping_unmap(vaddr: s); | 
|---|
| 1200 |  | 
|---|
| 1201 | mb(); | 
|---|
| 1202 | ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE); | 
|---|
| 1203 | mutex_unlock(lock: &ggtt->error_mutex); | 
|---|
| 1204 | if (ret) | 
|---|
| 1205 | break; | 
|---|
| 1206 | } | 
|---|
| 1207 | } else if (vma_res->bi.lmem) { | 
|---|
| 1208 | struct intel_memory_region *mem = vma_res->mr; | 
|---|
| 1209 | dma_addr_t dma; | 
|---|
| 1210 |  | 
|---|
| 1211 | for_each_sgt_daddr(dma, iter, vma_res->bi.pages) { | 
|---|
| 1212 | dma_addr_t offset = dma - mem->region.start; | 
|---|
| 1213 | void __iomem *s; | 
|---|
| 1214 |  | 
|---|
| 1215 | if (offset + PAGE_SIZE > resource_size(res: &mem->io)) { | 
|---|
| 1216 | ret = -EINVAL; | 
|---|
| 1217 | break; | 
|---|
| 1218 | } | 
|---|
| 1219 |  | 
|---|
| 1220 | s = io_mapping_map_wc(mapping: &mem->iomap, offset, PAGE_SIZE); | 
|---|
| 1221 | ret = compress_page(c: compress, | 
|---|
| 1222 | src: (void __force *)s, dst, | 
|---|
| 1223 | wc: true); | 
|---|
| 1224 | io_mapping_unmap(vaddr: s); | 
|---|
| 1225 | if (ret) | 
|---|
| 1226 | break; | 
|---|
| 1227 | } | 
|---|
| 1228 | } else { | 
|---|
| 1229 | struct page *page; | 
|---|
| 1230 |  | 
|---|
| 1231 | for_each_sgt_page(page, iter, vma_res->bi.pages) { | 
|---|
| 1232 | void *s; | 
|---|
| 1233 |  | 
|---|
| 1234 | drm_clflush_pages(pages: &page, num_pages: 1); | 
|---|
| 1235 |  | 
|---|
| 1236 | s = kmap_local_page(page); | 
|---|
| 1237 | ret = compress_page(c: compress, src: s, dst, wc: false); | 
|---|
| 1238 | kunmap_local(s); | 
|---|
| 1239 |  | 
|---|
| 1240 | drm_clflush_pages(pages: &page, num_pages: 1); | 
|---|
| 1241 |  | 
|---|
| 1242 | if (ret) | 
|---|
| 1243 | break; | 
|---|
| 1244 | } | 
|---|
| 1245 | } | 
|---|
| 1246 |  | 
|---|
| 1247 | if (ret || compress_flush(c: compress, dst)) { | 
|---|
| 1248 | struct page *page, *n; | 
|---|
| 1249 |  | 
|---|
| 1250 | list_for_each_entry_safe_reverse(page, n, &dst->page_list, lru) { | 
|---|
| 1251 | list_del_init(entry: &page->lru); | 
|---|
| 1252 | pool_free(fbatch: &compress->pool, page_address(page)); | 
|---|
| 1253 | } | 
|---|
| 1254 |  | 
|---|
| 1255 | kfree(objp: dst); | 
|---|
| 1256 | dst = NULL; | 
|---|
| 1257 | } | 
|---|
| 1258 | compress_finish(c: compress); | 
|---|
| 1259 |  | 
|---|
| 1260 | return dst; | 
|---|
| 1261 | } | 
|---|
| 1262 |  | 
|---|
| 1263 | static void gt_record_fences(struct intel_gt_coredump *gt) | 
|---|
| 1264 | { | 
|---|
| 1265 | struct i915_ggtt *ggtt = gt->_gt->ggtt; | 
|---|
| 1266 | struct intel_uncore *uncore = gt->_gt->uncore; | 
|---|
| 1267 | int i; | 
|---|
| 1268 |  | 
|---|
| 1269 | if (GRAPHICS_VER(uncore->i915) >= 6) { | 
|---|
| 1270 | for (i = 0; i < ggtt->num_fences; i++) | 
|---|
| 1271 | gt->fence[i] = | 
|---|
| 1272 | intel_uncore_read64(uncore, | 
|---|
| 1273 | FENCE_REG_GEN6_LO(i)); | 
|---|
| 1274 | } else if (GRAPHICS_VER(uncore->i915) >= 4) { | 
|---|
| 1275 | for (i = 0; i < ggtt->num_fences; i++) | 
|---|
| 1276 | gt->fence[i] = | 
|---|
| 1277 | intel_uncore_read64(uncore, | 
|---|
| 1278 | FENCE_REG_965_LO(i)); | 
|---|
| 1279 | } else { | 
|---|
| 1280 | for (i = 0; i < ggtt->num_fences; i++) | 
|---|
| 1281 | gt->fence[i] = | 
|---|
| 1282 | intel_uncore_read(uncore, FENCE_REG(i)); | 
|---|
| 1283 | } | 
|---|
| 1284 | gt->nfence = i; | 
|---|
| 1285 | } | 
|---|
| 1286 |  | 
|---|
| 1287 | static void engine_record_registers(struct intel_engine_coredump *ee) | 
|---|
| 1288 | { | 
|---|
| 1289 | const struct intel_engine_cs *engine = ee->engine; | 
|---|
| 1290 | struct drm_i915_private *i915 = engine->i915; | 
|---|
| 1291 |  | 
|---|
| 1292 | if (GRAPHICS_VER(i915) >= 6) { | 
|---|
| 1293 | ee->rc_psmi = ENGINE_READ(engine, RING_PSMI_CTL); | 
|---|
| 1294 |  | 
|---|
| 1295 | /* | 
|---|
| 1296 | * For the media GT, this ring fault register is not replicated, | 
|---|
| 1297 | * so don't do multicast/replicated register read/write | 
|---|
| 1298 | * operation on it. | 
|---|
| 1299 | */ | 
|---|
| 1300 | if (MEDIA_VER(i915) >= 13 && engine->gt->type == GT_MEDIA) | 
|---|
| 1301 | ee->fault_reg = intel_uncore_read(uncore: engine->uncore, | 
|---|
| 1302 | XELPMP_RING_FAULT_REG); | 
|---|
| 1303 | else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 55)) | 
|---|
| 1304 | ee->fault_reg = intel_gt_mcr_read_any(gt: engine->gt, | 
|---|
| 1305 | XEHP_RING_FAULT_REG); | 
|---|
| 1306 | else if (GRAPHICS_VER(i915) >= 12) | 
|---|
| 1307 | ee->fault_reg = intel_uncore_read(uncore: engine->uncore, | 
|---|
| 1308 | GEN12_RING_FAULT_REG); | 
|---|
| 1309 | else if (GRAPHICS_VER(i915) >= 8) | 
|---|
| 1310 | ee->fault_reg = intel_uncore_read(uncore: engine->uncore, | 
|---|
| 1311 | GEN8_RING_FAULT_REG); | 
|---|
| 1312 | else | 
|---|
| 1313 | ee->fault_reg = GEN6_RING_FAULT_REG_READ(engine); | 
|---|
| 1314 | } | 
|---|
| 1315 |  | 
|---|
| 1316 | if (GRAPHICS_VER(i915) >= 4) { | 
|---|
| 1317 | ee->esr = ENGINE_READ(engine, RING_ESR); | 
|---|
| 1318 | ee->faddr = ENGINE_READ(engine, RING_DMA_FADD); | 
|---|
| 1319 | ee->ipeir = ENGINE_READ(engine, RING_IPEIR); | 
|---|
| 1320 | ee->ipehr = ENGINE_READ(engine, RING_IPEHR); | 
|---|
| 1321 | ee->instps = ENGINE_READ(engine, RING_INSTPS); | 
|---|
| 1322 | ee->bbaddr = ENGINE_READ(engine, RING_BBADDR); | 
|---|
| 1323 | ee->ccid = ENGINE_READ(engine, CCID); | 
|---|
| 1324 | if (GRAPHICS_VER(i915) >= 8) { | 
|---|
| 1325 | ee->faddr |= (u64)ENGINE_READ(engine, RING_DMA_FADD_UDW) << 32; | 
|---|
| 1326 | ee->bbaddr |= (u64)ENGINE_READ(engine, RING_BBADDR_UDW) << 32; | 
|---|
| 1327 | } | 
|---|
| 1328 | ee->bbstate = ENGINE_READ(engine, RING_BBSTATE); | 
|---|
| 1329 | } else { | 
|---|
| 1330 | ee->faddr = ENGINE_READ(engine, DMA_FADD_I8XX); | 
|---|
| 1331 | ee->ipeir = ENGINE_READ(engine, IPEIR); | 
|---|
| 1332 | ee->ipehr = ENGINE_READ(engine, IPEHR); | 
|---|
| 1333 | } | 
|---|
| 1334 |  | 
|---|
| 1335 | if (GRAPHICS_VER(i915) >= 11) { | 
|---|
| 1336 | ee->cmd_cctl = ENGINE_READ(engine, RING_CMD_CCTL); | 
|---|
| 1337 | ee->cscmdop = ENGINE_READ(engine, RING_CSCMDOP); | 
|---|
| 1338 | ee->ctx_sr_ctl = ENGINE_READ(engine, RING_CTX_SR_CTL); | 
|---|
| 1339 | ee->dma_faddr_hi = ENGINE_READ(engine, RING_DMA_FADD_UDW); | 
|---|
| 1340 | ee->dma_faddr_lo = ENGINE_READ(engine, RING_DMA_FADD); | 
|---|
| 1341 | ee->nopid = ENGINE_READ(engine, RING_NOPID); | 
|---|
| 1342 | ee->excc = ENGINE_READ(engine, RING_EXCC); | 
|---|
| 1343 | } | 
|---|
| 1344 |  | 
|---|
| 1345 | intel_engine_get_instdone(engine, instdone: &ee->instdone); | 
|---|
| 1346 |  | 
|---|
| 1347 | ee->instpm = ENGINE_READ(engine, RING_INSTPM); | 
|---|
| 1348 | ee->acthd = intel_engine_get_active_head(engine); | 
|---|
| 1349 | ee->start = ENGINE_READ(engine, RING_START); | 
|---|
| 1350 | ee->head = ENGINE_READ(engine, RING_HEAD); | 
|---|
| 1351 | ee->tail = ENGINE_READ(engine, RING_TAIL); | 
|---|
| 1352 | ee->ctl = ENGINE_READ(engine, RING_CTL); | 
|---|
| 1353 | if (GRAPHICS_VER(i915) > 2) | 
|---|
| 1354 | ee->mode = ENGINE_READ(engine, RING_MI_MODE); | 
|---|
| 1355 |  | 
|---|
| 1356 | if (!HWS_NEEDS_PHYSICAL(i915)) { | 
|---|
| 1357 | i915_reg_t mmio; | 
|---|
| 1358 |  | 
|---|
| 1359 | if (GRAPHICS_VER(i915) == 7) { | 
|---|
| 1360 | switch (engine->id) { | 
|---|
| 1361 | default: | 
|---|
| 1362 | MISSING_CASE(engine->id); | 
|---|
| 1363 | fallthrough; | 
|---|
| 1364 | case RCS0: | 
|---|
| 1365 | mmio = RENDER_HWS_PGA_GEN7; | 
|---|
| 1366 | break; | 
|---|
| 1367 | case BCS0: | 
|---|
| 1368 | mmio = BLT_HWS_PGA_GEN7; | 
|---|
| 1369 | break; | 
|---|
| 1370 | case VCS0: | 
|---|
| 1371 | mmio = BSD_HWS_PGA_GEN7; | 
|---|
| 1372 | break; | 
|---|
| 1373 | case VECS0: | 
|---|
| 1374 | mmio = VEBOX_HWS_PGA_GEN7; | 
|---|
| 1375 | break; | 
|---|
| 1376 | } | 
|---|
| 1377 | } else if (GRAPHICS_VER(engine->i915) == 6) { | 
|---|
| 1378 | mmio = RING_HWS_PGA_GEN6(engine->mmio_base); | 
|---|
| 1379 | } else { | 
|---|
| 1380 | /* XXX: gen8 returns to sanity */ | 
|---|
| 1381 | mmio = RING_HWS_PGA(engine->mmio_base); | 
|---|
| 1382 | } | 
|---|
| 1383 |  | 
|---|
| 1384 | ee->hws = intel_uncore_read(uncore: engine->uncore, reg: mmio); | 
|---|
| 1385 | } | 
|---|
| 1386 |  | 
|---|
| 1387 | ee->reset_count = i915_reset_engine_count(error: &i915->gpu_error, engine); | 
|---|
| 1388 |  | 
|---|
| 1389 | if (HAS_PPGTT(i915)) { | 
|---|
| 1390 | int i; | 
|---|
| 1391 |  | 
|---|
| 1392 | ee->vm_info.gfx_mode = ENGINE_READ(engine, RING_MODE_GEN7); | 
|---|
| 1393 |  | 
|---|
| 1394 | if (GRAPHICS_VER(i915) == 6) { | 
|---|
| 1395 | ee->vm_info.pp_dir_base = | 
|---|
| 1396 | ENGINE_READ(engine, RING_PP_DIR_BASE_READ); | 
|---|
| 1397 | } else if (GRAPHICS_VER(i915) == 7) { | 
|---|
| 1398 | ee->vm_info.pp_dir_base = | 
|---|
| 1399 | ENGINE_READ(engine, RING_PP_DIR_BASE); | 
|---|
| 1400 | } else if (GRAPHICS_VER(i915) >= 8) { | 
|---|
| 1401 | u32 base = engine->mmio_base; | 
|---|
| 1402 |  | 
|---|
| 1403 | for (i = 0; i < 4; i++) { | 
|---|
| 1404 | ee->vm_info.pdp[i] = | 
|---|
| 1405 | intel_uncore_read(uncore: engine->uncore, | 
|---|
| 1406 | GEN8_RING_PDP_UDW(base, i)); | 
|---|
| 1407 | ee->vm_info.pdp[i] <<= 32; | 
|---|
| 1408 | ee->vm_info.pdp[i] |= | 
|---|
| 1409 | intel_uncore_read(uncore: engine->uncore, | 
|---|
| 1410 | GEN8_RING_PDP_LDW(base, i)); | 
|---|
| 1411 | } | 
|---|
| 1412 | } | 
|---|
| 1413 | } | 
|---|
| 1414 | } | 
|---|
| 1415 |  | 
|---|
| 1416 | static void record_request(const struct i915_request *request, | 
|---|
| 1417 | struct i915_request_coredump *erq) | 
|---|
| 1418 | { | 
|---|
| 1419 | erq->flags = request->fence.flags; | 
|---|
| 1420 | erq->context = request->fence.context; | 
|---|
| 1421 | erq->seqno = request->fence.seqno; | 
|---|
| 1422 | erq->sched_attr = request->sched.attr; | 
|---|
| 1423 | erq->head = request->head; | 
|---|
| 1424 | erq->tail = request->tail; | 
|---|
| 1425 |  | 
|---|
| 1426 | erq->pid = 0; | 
|---|
| 1427 | rcu_read_lock(); | 
|---|
| 1428 | if (!intel_context_is_closed(ce: request->context)) { | 
|---|
| 1429 | const struct i915_gem_context *ctx; | 
|---|
| 1430 |  | 
|---|
| 1431 | ctx = rcu_dereference(request->context->gem_context); | 
|---|
| 1432 | if (ctx) | 
|---|
| 1433 | erq->pid = pid_nr(pid: ctx->pid); | 
|---|
| 1434 | } | 
|---|
| 1435 | rcu_read_unlock(); | 
|---|
| 1436 | } | 
|---|
| 1437 |  | 
|---|
| 1438 | static void engine_record_execlists(struct intel_engine_coredump *ee) | 
|---|
| 1439 | { | 
|---|
| 1440 | const struct intel_engine_execlists * const el = &ee->engine->execlists; | 
|---|
| 1441 | struct i915_request * const *port = el->active; | 
|---|
| 1442 | unsigned int n = 0; | 
|---|
| 1443 |  | 
|---|
| 1444 | while (*port) | 
|---|
| 1445 | record_request(request: *port++, erq: &ee->execlist[n++]); | 
|---|
| 1446 |  | 
|---|
| 1447 | ee->num_ports = n; | 
|---|
| 1448 | } | 
|---|
| 1449 |  | 
|---|
| 1450 | static bool record_context(struct i915_gem_context_coredump *e, | 
|---|
| 1451 | struct intel_context *ce) | 
|---|
| 1452 | { | 
|---|
| 1453 | struct i915_gem_context *ctx; | 
|---|
| 1454 | struct task_struct *task; | 
|---|
| 1455 | bool simulated; | 
|---|
| 1456 |  | 
|---|
| 1457 | rcu_read_lock(); | 
|---|
| 1458 | ctx = rcu_dereference(ce->gem_context); | 
|---|
| 1459 | if (ctx && !kref_get_unless_zero(kref: &ctx->ref)) | 
|---|
| 1460 | ctx = NULL; | 
|---|
| 1461 | rcu_read_unlock(); | 
|---|
| 1462 | if (!ctx) | 
|---|
| 1463 | return true; | 
|---|
| 1464 |  | 
|---|
| 1465 | rcu_read_lock(); | 
|---|
| 1466 | task = pid_task(pid: ctx->pid, PIDTYPE_PID); | 
|---|
| 1467 | if (task) { | 
|---|
| 1468 | strscpy(e->comm, task->comm); | 
|---|
| 1469 | e->pid = task->pid; | 
|---|
| 1470 | } | 
|---|
| 1471 | rcu_read_unlock(); | 
|---|
| 1472 |  | 
|---|
| 1473 | e->sched_attr = ctx->sched; | 
|---|
| 1474 | e->guilty = atomic_read(v: &ctx->guilty_count); | 
|---|
| 1475 | e->active = atomic_read(v: &ctx->active_count); | 
|---|
| 1476 | e->hwsp_seqno = (ce->timeline && ce->timeline->hwsp_seqno) ? | 
|---|
| 1477 | *ce->timeline->hwsp_seqno : ~0U; | 
|---|
| 1478 |  | 
|---|
| 1479 | e->total_runtime = intel_context_get_total_runtime_ns(ce); | 
|---|
| 1480 | e->avg_runtime = intel_context_get_avg_runtime_ns(ce); | 
|---|
| 1481 |  | 
|---|
| 1482 | simulated = i915_gem_context_no_error_capture(ctx); | 
|---|
| 1483 |  | 
|---|
| 1484 | i915_gem_context_put(ctx); | 
|---|
| 1485 | return simulated; | 
|---|
| 1486 | } | 
|---|
| 1487 |  | 
|---|
| 1488 | struct intel_engine_capture_vma { | 
|---|
| 1489 | struct intel_engine_capture_vma *next; | 
|---|
| 1490 | struct i915_vma_resource *vma_res; | 
|---|
| 1491 | char name[16]; | 
|---|
| 1492 | bool lockdep_cookie; | 
|---|
| 1493 | }; | 
|---|
| 1494 |  | 
|---|
| 1495 | static struct intel_engine_capture_vma * | 
|---|
| 1496 | capture_vma_snapshot(struct intel_engine_capture_vma *next, | 
|---|
| 1497 | struct i915_vma_resource *vma_res, | 
|---|
| 1498 | gfp_t gfp, const char *name) | 
|---|
| 1499 | { | 
|---|
| 1500 | struct intel_engine_capture_vma *c; | 
|---|
| 1501 |  | 
|---|
| 1502 | if (!vma_res) | 
|---|
| 1503 | return next; | 
|---|
| 1504 |  | 
|---|
| 1505 | c = kmalloc(sizeof(*c), gfp); | 
|---|
| 1506 | if (!c) | 
|---|
| 1507 | return next; | 
|---|
| 1508 |  | 
|---|
| 1509 | if (!i915_vma_resource_hold(vma_res, lockdep_cookie: &c->lockdep_cookie)) { | 
|---|
| 1510 | kfree(objp: c); | 
|---|
| 1511 | return next; | 
|---|
| 1512 | } | 
|---|
| 1513 |  | 
|---|
| 1514 | strscpy(c->name, name); | 
|---|
| 1515 | c->vma_res = i915_vma_resource_get(vma_res); | 
|---|
| 1516 |  | 
|---|
| 1517 | c->next = next; | 
|---|
| 1518 | return c; | 
|---|
| 1519 | } | 
|---|
| 1520 |  | 
|---|
| 1521 | static struct intel_engine_capture_vma * | 
|---|
| 1522 | capture_vma(struct intel_engine_capture_vma *next, | 
|---|
| 1523 | struct i915_vma *vma, | 
|---|
| 1524 | const char *name, | 
|---|
| 1525 | gfp_t gfp) | 
|---|
| 1526 | { | 
|---|
| 1527 | if (!vma) | 
|---|
| 1528 | return next; | 
|---|
| 1529 |  | 
|---|
| 1530 | /* | 
|---|
| 1531 | * If the vma isn't pinned, then the vma should be snapshotted | 
|---|
| 1532 | * to a struct i915_vma_snapshot at command submission time. | 
|---|
| 1533 | * Not here. | 
|---|
| 1534 | */ | 
|---|
| 1535 | if (GEM_WARN_ON(!i915_vma_is_pinned(vma))) | 
|---|
| 1536 | return next; | 
|---|
| 1537 |  | 
|---|
| 1538 | next = capture_vma_snapshot(next, vma_res: vma->resource, gfp, name); | 
|---|
| 1539 |  | 
|---|
| 1540 | return next; | 
|---|
| 1541 | } | 
|---|
| 1542 |  | 
|---|
| 1543 | static struct intel_engine_capture_vma * | 
|---|
| 1544 | capture_user(struct intel_engine_capture_vma *capture, | 
|---|
| 1545 | const struct i915_request *rq, | 
|---|
| 1546 | gfp_t gfp) | 
|---|
| 1547 | { | 
|---|
| 1548 | struct i915_capture_list *c; | 
|---|
| 1549 |  | 
|---|
| 1550 | for (c = rq->capture_list; c; c = c->next) | 
|---|
| 1551 | capture = capture_vma_snapshot(next: capture, vma_res: c->vma_res, gfp, | 
|---|
| 1552 | name: "user"); | 
|---|
| 1553 |  | 
|---|
| 1554 | return capture; | 
|---|
| 1555 | } | 
|---|
| 1556 |  | 
|---|
| 1557 | static void add_vma(struct intel_engine_coredump *ee, | 
|---|
| 1558 | struct i915_vma_coredump *vma) | 
|---|
| 1559 | { | 
|---|
| 1560 | if (vma) { | 
|---|
| 1561 | vma->next = ee->vma; | 
|---|
| 1562 | ee->vma = vma; | 
|---|
| 1563 | } | 
|---|
| 1564 | } | 
|---|
| 1565 |  | 
|---|
| 1566 | static struct i915_vma_coredump * | 
|---|
| 1567 | create_vma_coredump(const struct intel_gt *gt, struct i915_vma *vma, | 
|---|
| 1568 | const char *name, struct i915_vma_compress *compress) | 
|---|
| 1569 | { | 
|---|
| 1570 | struct i915_vma_coredump *ret = NULL; | 
|---|
| 1571 | struct i915_vma_resource *vma_res; | 
|---|
| 1572 | bool lockdep_cookie; | 
|---|
| 1573 |  | 
|---|
| 1574 | if (!vma) | 
|---|
| 1575 | return NULL; | 
|---|
| 1576 |  | 
|---|
| 1577 | vma_res = vma->resource; | 
|---|
| 1578 |  | 
|---|
| 1579 | if (i915_vma_resource_hold(vma_res, lockdep_cookie: &lockdep_cookie)) { | 
|---|
| 1580 | ret = i915_vma_coredump_create(gt, vma_res, compress, name); | 
|---|
| 1581 | i915_vma_resource_unhold(vma_res, lockdep_cookie); | 
|---|
| 1582 | } | 
|---|
| 1583 |  | 
|---|
| 1584 | return ret; | 
|---|
| 1585 | } | 
|---|
| 1586 |  | 
|---|
| 1587 | static void add_vma_coredump(struct intel_engine_coredump *ee, | 
|---|
| 1588 | const struct intel_gt *gt, | 
|---|
| 1589 | struct i915_vma *vma, | 
|---|
| 1590 | const char *name, | 
|---|
| 1591 | struct i915_vma_compress *compress) | 
|---|
| 1592 | { | 
|---|
| 1593 | add_vma(ee, vma: create_vma_coredump(gt, vma, name, compress)); | 
|---|
| 1594 | } | 
|---|
| 1595 |  | 
|---|
| 1596 | struct intel_engine_coredump * | 
|---|
| 1597 | intel_engine_coredump_alloc(struct intel_engine_cs *engine, gfp_t gfp, u32 dump_flags) | 
|---|
| 1598 | { | 
|---|
| 1599 | struct intel_engine_coredump *ee; | 
|---|
| 1600 |  | 
|---|
| 1601 | ee = kzalloc(sizeof(*ee), gfp); | 
|---|
| 1602 | if (!ee) | 
|---|
| 1603 | return NULL; | 
|---|
| 1604 |  | 
|---|
| 1605 | ee->engine = engine; | 
|---|
| 1606 |  | 
|---|
| 1607 | if (!(dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE)) { | 
|---|
| 1608 | engine_record_registers(ee); | 
|---|
| 1609 | engine_record_execlists(ee); | 
|---|
| 1610 | } | 
|---|
| 1611 |  | 
|---|
| 1612 | return ee; | 
|---|
| 1613 | } | 
|---|
| 1614 |  | 
|---|
| 1615 | static struct intel_engine_capture_vma * | 
|---|
| 1616 | engine_coredump_add_context(struct intel_engine_coredump *ee, | 
|---|
| 1617 | struct intel_context *ce, | 
|---|
| 1618 | gfp_t gfp) | 
|---|
| 1619 | { | 
|---|
| 1620 | struct intel_engine_capture_vma *vma = NULL; | 
|---|
| 1621 |  | 
|---|
| 1622 | ee->simulated |= record_context(e: &ee->context, ce); | 
|---|
| 1623 | if (ee->simulated) | 
|---|
| 1624 | return NULL; | 
|---|
| 1625 |  | 
|---|
| 1626 | /* | 
|---|
| 1627 | * We need to copy these to an anonymous buffer | 
|---|
| 1628 | * as the simplest method to avoid being overwritten | 
|---|
| 1629 | * by userspace. | 
|---|
| 1630 | */ | 
|---|
| 1631 | vma = capture_vma(next: vma, vma: ce->ring->vma, name: "ring", gfp); | 
|---|
| 1632 | vma = capture_vma(next: vma, vma: ce->state, name: "HW context", gfp); | 
|---|
| 1633 |  | 
|---|
| 1634 | return vma; | 
|---|
| 1635 | } | 
|---|
| 1636 |  | 
|---|
| 1637 | struct intel_engine_capture_vma * | 
|---|
| 1638 | intel_engine_coredump_add_request(struct intel_engine_coredump *ee, | 
|---|
| 1639 | struct i915_request *rq, | 
|---|
| 1640 | gfp_t gfp) | 
|---|
| 1641 | { | 
|---|
| 1642 | struct intel_engine_capture_vma *vma; | 
|---|
| 1643 |  | 
|---|
| 1644 | vma = engine_coredump_add_context(ee, ce: rq->context, gfp); | 
|---|
| 1645 | if (!vma) | 
|---|
| 1646 | return NULL; | 
|---|
| 1647 |  | 
|---|
| 1648 | /* | 
|---|
| 1649 | * We need to copy these to an anonymous buffer | 
|---|
| 1650 | * as the simplest method to avoid being overwritten | 
|---|
| 1651 | * by userspace. | 
|---|
| 1652 | */ | 
|---|
| 1653 | vma = capture_vma_snapshot(next: vma, vma_res: rq->batch_res, gfp, name: "batch"); | 
|---|
| 1654 | vma = capture_user(capture: vma, rq, gfp); | 
|---|
| 1655 |  | 
|---|
| 1656 | ee->rq_head = rq->head; | 
|---|
| 1657 | ee->rq_post = rq->postfix; | 
|---|
| 1658 | ee->rq_tail = rq->tail; | 
|---|
| 1659 |  | 
|---|
| 1660 | return vma; | 
|---|
| 1661 | } | 
|---|
| 1662 |  | 
|---|
| 1663 | void | 
|---|
| 1664 | intel_engine_coredump_add_vma(struct intel_engine_coredump *ee, | 
|---|
| 1665 | struct intel_engine_capture_vma *capture, | 
|---|
| 1666 | struct i915_vma_compress *compress) | 
|---|
| 1667 | { | 
|---|
| 1668 | const struct intel_engine_cs *engine = ee->engine; | 
|---|
| 1669 |  | 
|---|
| 1670 | while (capture) { | 
|---|
| 1671 | struct intel_engine_capture_vma *this = capture; | 
|---|
| 1672 | struct i915_vma_resource *vma_res = this->vma_res; | 
|---|
| 1673 |  | 
|---|
| 1674 | add_vma(ee, | 
|---|
| 1675 | vma: i915_vma_coredump_create(gt: engine->gt, vma_res, | 
|---|
| 1676 | compress, name: this->name)); | 
|---|
| 1677 |  | 
|---|
| 1678 | i915_vma_resource_unhold(vma_res, lockdep_cookie: this->lockdep_cookie); | 
|---|
| 1679 | i915_vma_resource_put(vma_res); | 
|---|
| 1680 |  | 
|---|
| 1681 | capture = this->next; | 
|---|
| 1682 | kfree(objp: this); | 
|---|
| 1683 | } | 
|---|
| 1684 |  | 
|---|
| 1685 | add_vma_coredump(ee, gt: engine->gt, vma: engine->status_page.vma, | 
|---|
| 1686 | name: "HW Status", compress); | 
|---|
| 1687 |  | 
|---|
| 1688 | add_vma_coredump(ee, gt: engine->gt, vma: engine->wa_ctx.vma, | 
|---|
| 1689 | name: "WA context", compress); | 
|---|
| 1690 | } | 
|---|
| 1691 |  | 
|---|
| 1692 | static struct intel_engine_coredump * | 
|---|
| 1693 | capture_engine(struct intel_engine_cs *engine, | 
|---|
| 1694 | struct i915_vma_compress *compress, | 
|---|
| 1695 | u32 dump_flags) | 
|---|
| 1696 | { | 
|---|
| 1697 | struct intel_engine_capture_vma *capture = NULL; | 
|---|
| 1698 | struct intel_engine_coredump *ee; | 
|---|
| 1699 | struct intel_context *ce = NULL; | 
|---|
| 1700 | struct i915_request *rq = NULL; | 
|---|
| 1701 |  | 
|---|
| 1702 | ee = intel_engine_coredump_alloc(engine, ALLOW_FAIL, dump_flags); | 
|---|
| 1703 | if (!ee) | 
|---|
| 1704 | return NULL; | 
|---|
| 1705 |  | 
|---|
| 1706 | intel_engine_get_hung_entity(engine, ce: &ce, rq: &rq); | 
|---|
| 1707 | if (rq && !i915_request_started(rq)) { | 
|---|
| 1708 | /* | 
|---|
| 1709 | * We want to know also what is the guc_id of the context, | 
|---|
| 1710 | * but if we don't have the context reference, then skip | 
|---|
| 1711 | * printing it. | 
|---|
| 1712 | */ | 
|---|
| 1713 | if (ce) | 
|---|
| 1714 | drm_info(&engine->gt->i915->drm, | 
|---|
| 1715 | "Got hung context on %s with active request %lld:%lld [0x%04X] not yet started\n", | 
|---|
| 1716 | engine->name, rq->fence.context, rq->fence.seqno, ce->guc_id.id); | 
|---|
| 1717 | else | 
|---|
| 1718 | drm_info(&engine->gt->i915->drm, | 
|---|
| 1719 | "Got hung context on %s with active request %lld:%lld not yet started\n", | 
|---|
| 1720 | engine->name, rq->fence.context, rq->fence.seqno); | 
|---|
| 1721 | } | 
|---|
| 1722 |  | 
|---|
| 1723 | if (rq) { | 
|---|
| 1724 | capture = intel_engine_coredump_add_request(ee, rq, ATOMIC_MAYFAIL); | 
|---|
| 1725 | i915_request_put(rq); | 
|---|
| 1726 | } else if (ce) { | 
|---|
| 1727 | capture = engine_coredump_add_context(ee, ce, ATOMIC_MAYFAIL); | 
|---|
| 1728 | } | 
|---|
| 1729 |  | 
|---|
| 1730 | if (capture) { | 
|---|
| 1731 | intel_engine_coredump_add_vma(ee, capture, compress); | 
|---|
| 1732 |  | 
|---|
| 1733 | if (dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE) | 
|---|
| 1734 | intel_guc_capture_get_matching_node(gt: engine->gt, ee, ce); | 
|---|
| 1735 | } else { | 
|---|
| 1736 | kfree(objp: ee); | 
|---|
| 1737 | ee = NULL; | 
|---|
| 1738 | } | 
|---|
| 1739 |  | 
|---|
| 1740 | return ee; | 
|---|
| 1741 | } | 
|---|
| 1742 |  | 
|---|
| 1743 | static void | 
|---|
| 1744 | gt_record_engines(struct intel_gt_coredump *gt, | 
|---|
| 1745 | intel_engine_mask_t engine_mask, | 
|---|
| 1746 | struct i915_vma_compress *compress, | 
|---|
| 1747 | u32 dump_flags) | 
|---|
| 1748 | { | 
|---|
| 1749 | struct intel_engine_cs *engine; | 
|---|
| 1750 | enum intel_engine_id id; | 
|---|
| 1751 |  | 
|---|
| 1752 | for_each_engine(engine, gt->_gt, id) { | 
|---|
| 1753 | struct intel_engine_coredump *ee; | 
|---|
| 1754 |  | 
|---|
| 1755 | /* Refill our page pool before entering atomic section */ | 
|---|
| 1756 | pool_refill(fbatch: &compress->pool, ALLOW_FAIL); | 
|---|
| 1757 |  | 
|---|
| 1758 | ee = capture_engine(engine, compress, dump_flags); | 
|---|
| 1759 | if (!ee) | 
|---|
| 1760 | continue; | 
|---|
| 1761 |  | 
|---|
| 1762 | ee->hung = engine->mask & engine_mask; | 
|---|
| 1763 |  | 
|---|
| 1764 | gt->simulated |= ee->simulated; | 
|---|
| 1765 | if (ee->simulated) { | 
|---|
| 1766 | if (dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE) | 
|---|
| 1767 | intel_guc_capture_free_node(ee); | 
|---|
| 1768 | kfree(objp: ee); | 
|---|
| 1769 | continue; | 
|---|
| 1770 | } | 
|---|
| 1771 |  | 
|---|
| 1772 | ee->next = gt->engine; | 
|---|
| 1773 | gt->engine = ee; | 
|---|
| 1774 | } | 
|---|
| 1775 | } | 
|---|
| 1776 |  | 
|---|
| 1777 | static void gt_record_guc_ctb(struct intel_ctb_coredump *saved, | 
|---|
| 1778 | const struct intel_guc_ct_buffer *ctb, | 
|---|
| 1779 | const void *blob_ptr, struct intel_guc *guc) | 
|---|
| 1780 | { | 
|---|
| 1781 | if (!ctb || !ctb->desc) | 
|---|
| 1782 | return; | 
|---|
| 1783 |  | 
|---|
| 1784 | saved->raw_status = ctb->desc->status; | 
|---|
| 1785 | saved->raw_head = ctb->desc->head; | 
|---|
| 1786 | saved->raw_tail = ctb->desc->tail; | 
|---|
| 1787 | saved->head = ctb->head; | 
|---|
| 1788 | saved->tail = ctb->tail; | 
|---|
| 1789 | saved->size = ctb->size; | 
|---|
| 1790 | saved->desc_offset = ((void *)ctb->desc) - blob_ptr; | 
|---|
| 1791 | saved->cmds_offset = ((void *)ctb->cmds) - blob_ptr; | 
|---|
| 1792 | } | 
|---|
| 1793 |  | 
|---|
| 1794 | static u32 read_guc_state_reg(struct intel_uncore *uncore, int range, int count) | 
|---|
| 1795 | { | 
|---|
| 1796 | GEM_BUG_ON(range >= ARRAY_SIZE(guc_hw_reg_state)); | 
|---|
| 1797 | GEM_BUG_ON(count >= guc_hw_reg_state[range].count); | 
|---|
| 1798 |  | 
|---|
| 1799 | return intel_uncore_read(uncore, | 
|---|
| 1800 | _MMIO(guc_hw_reg_state[range].start + count * sizeof(u32))); | 
|---|
| 1801 | } | 
|---|
| 1802 |  | 
|---|
| 1803 | static void gt_record_guc_hw_state(struct intel_uncore *uncore, | 
|---|
| 1804 | struct intel_uc_coredump *error_uc) | 
|---|
| 1805 | { | 
|---|
| 1806 | u32 *hw_state; | 
|---|
| 1807 | u32 count = 0; | 
|---|
| 1808 | int i, j; | 
|---|
| 1809 |  | 
|---|
| 1810 | for (i = 0; i < ARRAY_SIZE(guc_hw_reg_state); i++) | 
|---|
| 1811 | count += guc_hw_reg_state[i].count; | 
|---|
| 1812 |  | 
|---|
| 1813 | hw_state = kcalloc(count, sizeof(u32), ALLOW_FAIL); | 
|---|
| 1814 | if (!hw_state) | 
|---|
| 1815 | return; | 
|---|
| 1816 |  | 
|---|
| 1817 | count = 0; | 
|---|
| 1818 | for (i = 0; i < ARRAY_SIZE(guc_hw_reg_state); i++) | 
|---|
| 1819 | for (j = 0; j < guc_hw_reg_state[i].count; j++) | 
|---|
| 1820 | hw_state[count++] = read_guc_state_reg(uncore, range: i, count: j); | 
|---|
| 1821 |  | 
|---|
| 1822 | error_uc->guc.hw_state = hw_state; | 
|---|
| 1823 | } | 
|---|
| 1824 |  | 
|---|
| 1825 | static struct intel_uc_coredump * | 
|---|
| 1826 | gt_record_uc(struct intel_gt_coredump *gt, | 
|---|
| 1827 | struct i915_vma_compress *compress) | 
|---|
| 1828 | { | 
|---|
| 1829 | const struct intel_uc *uc = >->_gt->uc; | 
|---|
| 1830 | struct intel_uc_coredump *error_uc; | 
|---|
| 1831 |  | 
|---|
| 1832 | error_uc = kzalloc(sizeof(*error_uc), ALLOW_FAIL); | 
|---|
| 1833 | if (!error_uc) | 
|---|
| 1834 | return NULL; | 
|---|
| 1835 |  | 
|---|
| 1836 | memcpy(to: &error_uc->guc_fw, from: &uc->guc.fw, len: sizeof(uc->guc.fw)); | 
|---|
| 1837 | memcpy(to: &error_uc->huc_fw, from: &uc->huc.fw, len: sizeof(uc->huc.fw)); | 
|---|
| 1838 |  | 
|---|
| 1839 | error_uc->guc_fw.file_selected.path = kstrdup(s: uc->guc.fw.file_selected.path, ALLOW_FAIL); | 
|---|
| 1840 | error_uc->huc_fw.file_selected.path = kstrdup(s: uc->huc.fw.file_selected.path, ALLOW_FAIL); | 
|---|
| 1841 | error_uc->guc_fw.file_wanted.path = kstrdup(s: uc->guc.fw.file_wanted.path, ALLOW_FAIL); | 
|---|
| 1842 | error_uc->huc_fw.file_wanted.path = kstrdup(s: uc->huc.fw.file_wanted.path, ALLOW_FAIL); | 
|---|
| 1843 |  | 
|---|
| 1844 | /* | 
|---|
| 1845 | * Save the GuC log and include a timestamp reference for converting the | 
|---|
| 1846 | * log times to system times (in conjunction with the error->boottime and | 
|---|
| 1847 | * gt->clock_frequency fields saved elsewhere). | 
|---|
| 1848 | */ | 
|---|
| 1849 | error_uc->guc.timestamp = intel_uncore_read(uncore: gt->_gt->uncore, GUCPMTIMESTAMP); | 
|---|
| 1850 | error_uc->guc.vma_log = create_vma_coredump(gt: gt->_gt, vma: uc->guc.log.vma, | 
|---|
| 1851 | name: "GuC log buffer", compress); | 
|---|
| 1852 | error_uc->guc.vma_ctb = create_vma_coredump(gt: gt->_gt, vma: uc->guc.ct.vma, | 
|---|
| 1853 | name: "GuC CT buffer", compress); | 
|---|
| 1854 | error_uc->guc.last_fence = uc->guc.ct.requests.last_fence; | 
|---|
| 1855 | gt_record_guc_ctb(saved: error_uc->guc.ctb + 0, ctb: &uc->guc.ct.ctbs.send, | 
|---|
| 1856 | blob_ptr: uc->guc.ct.ctbs.send.desc, guc: (struct intel_guc *)&uc->guc); | 
|---|
| 1857 | gt_record_guc_ctb(saved: error_uc->guc.ctb + 1, ctb: &uc->guc.ct.ctbs.recv, | 
|---|
| 1858 | blob_ptr: uc->guc.ct.ctbs.send.desc, guc: (struct intel_guc *)&uc->guc); | 
|---|
| 1859 | gt_record_guc_hw_state(uncore: gt->_gt->uncore, error_uc); | 
|---|
| 1860 |  | 
|---|
| 1861 | return error_uc; | 
|---|
| 1862 | } | 
|---|
| 1863 |  | 
|---|
| 1864 | /* Capture all other registers that GuC doesn't capture. */ | 
|---|
| 1865 | static void gt_record_global_nonguc_regs(struct intel_gt_coredump *gt) | 
|---|
| 1866 | { | 
|---|
| 1867 | struct intel_uncore *uncore = gt->_gt->uncore; | 
|---|
| 1868 | struct drm_i915_private *i915 = uncore->i915; | 
|---|
| 1869 | int i; | 
|---|
| 1870 |  | 
|---|
| 1871 | if (IS_VALLEYVIEW(i915)) { | 
|---|
| 1872 | gt->gtier[0] = intel_uncore_read(uncore, GTIER); | 
|---|
| 1873 | gt->ngtier = 1; | 
|---|
| 1874 | } else if (GRAPHICS_VER(i915) >= 11) { | 
|---|
| 1875 | gt->gtier[0] = | 
|---|
| 1876 | intel_uncore_read(uncore, | 
|---|
| 1877 | GEN11_RENDER_COPY_INTR_ENABLE); | 
|---|
| 1878 | gt->gtier[1] = | 
|---|
| 1879 | intel_uncore_read(uncore, GEN11_VCS_VECS_INTR_ENABLE); | 
|---|
| 1880 | gt->gtier[2] = | 
|---|
| 1881 | intel_uncore_read(uncore, GEN11_GUC_SG_INTR_ENABLE); | 
|---|
| 1882 | gt->gtier[3] = | 
|---|
| 1883 | intel_uncore_read(uncore, | 
|---|
| 1884 | GEN11_GPM_WGBOXPERF_INTR_ENABLE); | 
|---|
| 1885 | gt->gtier[4] = | 
|---|
| 1886 | intel_uncore_read(uncore, | 
|---|
| 1887 | GEN11_CRYPTO_RSVD_INTR_ENABLE); | 
|---|
| 1888 | gt->gtier[5] = | 
|---|
| 1889 | intel_uncore_read(uncore, | 
|---|
| 1890 | GEN11_GUNIT_CSME_INTR_ENABLE); | 
|---|
| 1891 | gt->ngtier = 6; | 
|---|
| 1892 | } else if (GRAPHICS_VER(i915) >= 8) { | 
|---|
| 1893 | for (i = 0; i < 4; i++) | 
|---|
| 1894 | gt->gtier[i] = | 
|---|
| 1895 | intel_uncore_read(uncore, GEN8_GT_IER(i)); | 
|---|
| 1896 | gt->ngtier = 4; | 
|---|
| 1897 | } else if (GRAPHICS_VER(i915) >= 5) { | 
|---|
| 1898 | gt->gtier[0] = intel_uncore_read(uncore, GTIER); | 
|---|
| 1899 | gt->ngtier = 1; | 
|---|
| 1900 | } else { | 
|---|
| 1901 | gt->gtier[0] = intel_uncore_read(uncore, GEN2_IER); | 
|---|
| 1902 | gt->ngtier = 1; | 
|---|
| 1903 | } | 
|---|
| 1904 |  | 
|---|
| 1905 | gt->eir = intel_uncore_read(uncore, EIR); | 
|---|
| 1906 | gt->pgtbl_er = intel_uncore_read(uncore, PGTBL_ER); | 
|---|
| 1907 | } | 
|---|
| 1908 |  | 
|---|
| 1909 | /* | 
|---|
| 1910 | * Capture all registers that relate to workload submission. | 
|---|
| 1911 | * NOTE: In GuC submission, when GuC resets an engine, it can dump these for us | 
|---|
| 1912 | */ | 
|---|
| 1913 | static void gt_record_global_regs(struct intel_gt_coredump *gt) | 
|---|
| 1914 | { | 
|---|
| 1915 | struct intel_uncore *uncore = gt->_gt->uncore; | 
|---|
| 1916 | struct drm_i915_private *i915 = uncore->i915; | 
|---|
| 1917 | int i; | 
|---|
| 1918 |  | 
|---|
| 1919 | /* | 
|---|
| 1920 | * General organization | 
|---|
| 1921 | * 1. Registers specific to a single generation | 
|---|
| 1922 | * 2. Registers which belong to multiple generations | 
|---|
| 1923 | * 3. Feature specific registers. | 
|---|
| 1924 | * 4. Everything else | 
|---|
| 1925 | * Please try to follow the order. | 
|---|
| 1926 | */ | 
|---|
| 1927 |  | 
|---|
| 1928 | /* 1: Registers specific to a single generation */ | 
|---|
| 1929 | if (IS_VALLEYVIEW(i915)) | 
|---|
| 1930 | gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_VLV); | 
|---|
| 1931 |  | 
|---|
| 1932 | if (GRAPHICS_VER(i915) == 7) | 
|---|
| 1933 | gt->err_int = intel_uncore_read(uncore, GEN7_ERR_INT); | 
|---|
| 1934 |  | 
|---|
| 1935 | if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 55)) { | 
|---|
| 1936 | gt->fault_data0 = intel_gt_mcr_read_any(gt: (struct intel_gt *)gt->_gt, | 
|---|
| 1937 | XEHP_FAULT_TLB_DATA0); | 
|---|
| 1938 | gt->fault_data1 = intel_gt_mcr_read_any(gt: (struct intel_gt *)gt->_gt, | 
|---|
| 1939 | XEHP_FAULT_TLB_DATA1); | 
|---|
| 1940 | } else if (GRAPHICS_VER(i915) >= 12) { | 
|---|
| 1941 | gt->fault_data0 = intel_uncore_read(uncore, | 
|---|
| 1942 | GEN12_FAULT_TLB_DATA0); | 
|---|
| 1943 | gt->fault_data1 = intel_uncore_read(uncore, | 
|---|
| 1944 | GEN12_FAULT_TLB_DATA1); | 
|---|
| 1945 | } else if (GRAPHICS_VER(i915) >= 8) { | 
|---|
| 1946 | gt->fault_data0 = intel_uncore_read(uncore, | 
|---|
| 1947 | GEN8_FAULT_TLB_DATA0); | 
|---|
| 1948 | gt->fault_data1 = intel_uncore_read(uncore, | 
|---|
| 1949 | GEN8_FAULT_TLB_DATA1); | 
|---|
| 1950 | } | 
|---|
| 1951 |  | 
|---|
| 1952 | if (GRAPHICS_VER(i915) == 6) { | 
|---|
| 1953 | gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE); | 
|---|
| 1954 | gt->gab_ctl = intel_uncore_read(uncore, GAB_CTL); | 
|---|
| 1955 | gt->gfx_mode = intel_uncore_read(uncore, GFX_MODE); | 
|---|
| 1956 | } | 
|---|
| 1957 |  | 
|---|
| 1958 | /* 2: Registers which belong to multiple generations */ | 
|---|
| 1959 | if (GRAPHICS_VER(i915) >= 7) | 
|---|
| 1960 | gt->forcewake = intel_uncore_read_fw(uncore, FORCEWAKE_MT); | 
|---|
| 1961 |  | 
|---|
| 1962 | if (GRAPHICS_VER(i915) >= 6) { | 
|---|
| 1963 | if (GRAPHICS_VER(i915) < 12) { | 
|---|
| 1964 | gt->error = intel_uncore_read(uncore, ERROR_GEN6); | 
|---|
| 1965 | gt->done_reg = intel_uncore_read(uncore, DONE_REG); | 
|---|
| 1966 | } | 
|---|
| 1967 | } | 
|---|
| 1968 |  | 
|---|
| 1969 | /* 3: Feature specific registers */ | 
|---|
| 1970 | if (IS_GRAPHICS_VER(i915, 6, 7)) { | 
|---|
| 1971 | gt->gam_ecochk = intel_uncore_read(uncore, GAM_ECOCHK); | 
|---|
| 1972 | gt->gac_eco = intel_uncore_read(uncore, GAC_ECO_BITS); | 
|---|
| 1973 | } | 
|---|
| 1974 |  | 
|---|
| 1975 | if (IS_GRAPHICS_VER(i915, 8, 11)) | 
|---|
| 1976 | gt->gtt_cache = intel_uncore_read(uncore, HSW_GTT_CACHE_EN); | 
|---|
| 1977 |  | 
|---|
| 1978 | if (GRAPHICS_VER(i915) == 12) | 
|---|
| 1979 | gt->aux_err = intel_uncore_read(uncore, GEN12_AUX_ERR_DBG); | 
|---|
| 1980 |  | 
|---|
| 1981 | if (GRAPHICS_VER(i915) >= 12) { | 
|---|
| 1982 | for (i = 0; i < I915_MAX_SFC; i++) { | 
|---|
| 1983 | /* | 
|---|
| 1984 | * SFC_DONE resides in the VD forcewake domain, so it | 
|---|
| 1985 | * only exists if the corresponding VCS engine is | 
|---|
| 1986 | * present. | 
|---|
| 1987 | */ | 
|---|
| 1988 | if ((gt->_gt->info.sfc_mask & BIT(i)) == 0 || | 
|---|
| 1989 | !HAS_ENGINE(gt->_gt, _VCS(i * 2))) | 
|---|
| 1990 | continue; | 
|---|
| 1991 |  | 
|---|
| 1992 | gt->sfc_done[i] = | 
|---|
| 1993 | intel_uncore_read(uncore, GEN12_SFC_DONE(i)); | 
|---|
| 1994 | } | 
|---|
| 1995 |  | 
|---|
| 1996 | gt->gam_done = intel_uncore_read(uncore, GEN12_GAM_DONE); | 
|---|
| 1997 | } | 
|---|
| 1998 | } | 
|---|
| 1999 |  | 
|---|
| 2000 | static void gt_record_info(struct intel_gt_coredump *gt) | 
|---|
| 2001 | { | 
|---|
| 2002 | memcpy(to: >->info, from: >->_gt->info, len: sizeof(struct intel_gt_info)); | 
|---|
| 2003 | gt->clock_frequency = gt->_gt->clock_frequency; | 
|---|
| 2004 | gt->clock_period_ns = gt->_gt->clock_period_ns; | 
|---|
| 2005 | } | 
|---|
| 2006 |  | 
|---|
| 2007 | /* | 
|---|
| 2008 | * Generate a semi-unique error code. The code is not meant to have meaning, The | 
|---|
| 2009 | * code's only purpose is to try to prevent false duplicated bug reports by | 
|---|
| 2010 | * grossly estimating a GPU error state. | 
|---|
| 2011 | * | 
|---|
| 2012 | * TODO Ideally, hashing the batchbuffer would be a very nice way to determine | 
|---|
| 2013 | * the hang if we could strip the GTT offset information from it. | 
|---|
| 2014 | * | 
|---|
| 2015 | * It's only a small step better than a random number in its current form. | 
|---|
| 2016 | */ | 
|---|
| 2017 | static u32 generate_ecode(const struct intel_engine_coredump *ee) | 
|---|
| 2018 | { | 
|---|
| 2019 | /* | 
|---|
| 2020 | * IPEHR would be an ideal way to detect errors, as it's the gross | 
|---|
| 2021 | * measure of "the command that hung." However, has some very common | 
|---|
| 2022 | * synchronization commands which almost always appear in the case | 
|---|
| 2023 | * strictly a client bug. Use instdone to differentiate those some. | 
|---|
| 2024 | */ | 
|---|
| 2025 | return ee ? ee->ipehr ^ ee->instdone.instdone : 0; | 
|---|
| 2026 | } | 
|---|
| 2027 |  | 
|---|
| 2028 | static const char *error_msg(struct i915_gpu_coredump *error) | 
|---|
| 2029 | { | 
|---|
| 2030 | struct intel_engine_coredump *first = NULL; | 
|---|
| 2031 | unsigned int hung_classes = 0; | 
|---|
| 2032 | struct intel_gt_coredump *gt; | 
|---|
| 2033 | int len; | 
|---|
| 2034 |  | 
|---|
| 2035 | for (gt = error->gt; gt; gt = gt->next) { | 
|---|
| 2036 | struct intel_engine_coredump *cs; | 
|---|
| 2037 |  | 
|---|
| 2038 | for (cs = gt->engine; cs; cs = cs->next) { | 
|---|
| 2039 | if (cs->hung) { | 
|---|
| 2040 | hung_classes |= BIT(cs->engine->uabi_class); | 
|---|
| 2041 | if (!first) | 
|---|
| 2042 | first = cs; | 
|---|
| 2043 | } | 
|---|
| 2044 | } | 
|---|
| 2045 | } | 
|---|
| 2046 |  | 
|---|
| 2047 | len = scnprintf(buf: error->error_msg, size: sizeof(error->error_msg), | 
|---|
| 2048 | fmt: "GPU HANG: ecode %d:%x:%08x", | 
|---|
| 2049 | GRAPHICS_VER(error->i915), hung_classes, | 
|---|
| 2050 | generate_ecode(ee: first)); | 
|---|
| 2051 | if (first && first->context.pid) { | 
|---|
| 2052 | /* Just show the first executing process, more is confusing */ | 
|---|
| 2053 | len += scnprintf(buf: error->error_msg + len, | 
|---|
| 2054 | size: sizeof(error->error_msg) - len, | 
|---|
| 2055 | fmt: ", in %s [%d]", | 
|---|
| 2056 | first->context.comm, first->context.pid); | 
|---|
| 2057 | } | 
|---|
| 2058 |  | 
|---|
| 2059 | return error->error_msg; | 
|---|
| 2060 | } | 
|---|
| 2061 |  | 
|---|
| 2062 | static void capture_gen(struct i915_gpu_coredump *error) | 
|---|
| 2063 | { | 
|---|
| 2064 | struct drm_i915_private *i915 = error->i915; | 
|---|
| 2065 |  | 
|---|
| 2066 | error->wakelock = atomic_read(v: &i915->runtime_pm.wakeref_count); | 
|---|
| 2067 | error->suspended = pm_runtime_suspended(dev: i915->drm.dev); | 
|---|
| 2068 |  | 
|---|
| 2069 | error->iommu = i915_vtd_active(i915); | 
|---|
| 2070 | error->reset_count = i915_reset_count(error: &i915->gpu_error); | 
|---|
| 2071 | error->suspend_count = i915->suspend_count; | 
|---|
| 2072 |  | 
|---|
| 2073 | i915_params_copy(dest: &error->params, src: &i915->params); | 
|---|
| 2074 | memcpy(to: &error->device_info, | 
|---|
| 2075 | INTEL_INFO(i915), | 
|---|
| 2076 | len: sizeof(error->device_info)); | 
|---|
| 2077 | memcpy(to: &error->runtime_info, | 
|---|
| 2078 | RUNTIME_INFO(i915), | 
|---|
| 2079 | len: sizeof(error->runtime_info)); | 
|---|
| 2080 | error->driver_caps = i915->caps; | 
|---|
| 2081 | } | 
|---|
| 2082 |  | 
|---|
| 2083 | struct i915_gpu_coredump * | 
|---|
| 2084 | i915_gpu_coredump_alloc(struct drm_i915_private *i915, gfp_t gfp) | 
|---|
| 2085 | { | 
|---|
| 2086 | struct i915_gpu_coredump *error; | 
|---|
| 2087 |  | 
|---|
| 2088 | if (!i915->params.error_capture) | 
|---|
| 2089 | return NULL; | 
|---|
| 2090 |  | 
|---|
| 2091 | error = kzalloc(sizeof(*error), gfp); | 
|---|
| 2092 | if (!error) | 
|---|
| 2093 | return NULL; | 
|---|
| 2094 |  | 
|---|
| 2095 | kref_init(kref: &error->ref); | 
|---|
| 2096 | error->i915 = i915; | 
|---|
| 2097 |  | 
|---|
| 2098 | error->time = ktime_get_real(); | 
|---|
| 2099 | error->boottime = ktime_get_boottime(); | 
|---|
| 2100 | error->uptime = ktime_sub(ktime_get(), to_gt(i915)->last_init_time); | 
|---|
| 2101 | error->capture = jiffies; | 
|---|
| 2102 |  | 
|---|
| 2103 | capture_gen(error); | 
|---|
| 2104 |  | 
|---|
| 2105 | return error; | 
|---|
| 2106 | } | 
|---|
| 2107 |  | 
|---|
| 2108 | #define DAY_AS_SECONDS(x) (24 * 60 * 60 * (x)) | 
|---|
| 2109 |  | 
|---|
| 2110 | struct intel_gt_coredump * | 
|---|
| 2111 | intel_gt_coredump_alloc(struct intel_gt *gt, gfp_t gfp, u32 dump_flags) | 
|---|
| 2112 | { | 
|---|
| 2113 | struct intel_gt_coredump *gc; | 
|---|
| 2114 |  | 
|---|
| 2115 | gc = kzalloc(sizeof(*gc), gfp); | 
|---|
| 2116 | if (!gc) | 
|---|
| 2117 | return NULL; | 
|---|
| 2118 |  | 
|---|
| 2119 | gc->_gt = gt; | 
|---|
| 2120 | gc->awake = intel_gt_pm_is_awake(gt); | 
|---|
| 2121 |  | 
|---|
| 2122 | gt_record_global_nonguc_regs(gt: gc); | 
|---|
| 2123 |  | 
|---|
| 2124 | /* | 
|---|
| 2125 | * GuC dumps global, eng-class and eng-instance registers | 
|---|
| 2126 | * (that can change as part of engine state during execution) | 
|---|
| 2127 | * before an engine is reset due to a hung context. | 
|---|
| 2128 | * GuC captures and reports all three groups of registers | 
|---|
| 2129 | * together as a single set before the engine is reset. | 
|---|
| 2130 | * Thus, if GuC triggered the context reset we retrieve | 
|---|
| 2131 | * the register values as part of gt_record_engines. | 
|---|
| 2132 | */ | 
|---|
| 2133 | if (!(dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE)) | 
|---|
| 2134 | gt_record_global_regs(gt: gc); | 
|---|
| 2135 |  | 
|---|
| 2136 | gt_record_fences(gt: gc); | 
|---|
| 2137 |  | 
|---|
| 2138 | return gc; | 
|---|
| 2139 | } | 
|---|
| 2140 |  | 
|---|
| 2141 | struct i915_vma_compress * | 
|---|
| 2142 | i915_vma_capture_prepare(struct intel_gt_coredump *gt) | 
|---|
| 2143 | { | 
|---|
| 2144 | struct i915_vma_compress *compress; | 
|---|
| 2145 |  | 
|---|
| 2146 | compress = kmalloc(sizeof(*compress), ALLOW_FAIL); | 
|---|
| 2147 | if (!compress) | 
|---|
| 2148 | return NULL; | 
|---|
| 2149 |  | 
|---|
| 2150 | if (!compress_init(c: compress)) { | 
|---|
| 2151 | kfree(objp: compress); | 
|---|
| 2152 | return NULL; | 
|---|
| 2153 | } | 
|---|
| 2154 |  | 
|---|
| 2155 | return compress; | 
|---|
| 2156 | } | 
|---|
| 2157 |  | 
|---|
| 2158 | void i915_vma_capture_finish(struct intel_gt_coredump *gt, | 
|---|
| 2159 | struct i915_vma_compress *compress) | 
|---|
| 2160 | { | 
|---|
| 2161 | if (!compress) | 
|---|
| 2162 | return; | 
|---|
| 2163 |  | 
|---|
| 2164 | compress_fini(c: compress); | 
|---|
| 2165 | kfree(objp: compress); | 
|---|
| 2166 | } | 
|---|
| 2167 |  | 
|---|
| 2168 | static struct i915_gpu_coredump * | 
|---|
| 2169 | __i915_gpu_coredump(struct intel_gt *gt, intel_engine_mask_t engine_mask, u32 dump_flags) | 
|---|
| 2170 | { | 
|---|
| 2171 | struct drm_i915_private *i915 = gt->i915; | 
|---|
| 2172 | struct intel_display *display = i915->display; | 
|---|
| 2173 | struct i915_gpu_coredump *error; | 
|---|
| 2174 |  | 
|---|
| 2175 | /* Check if GPU capture has been disabled */ | 
|---|
| 2176 | error = READ_ONCE(i915->gpu_error.first_error); | 
|---|
| 2177 | if (IS_ERR(ptr: error)) | 
|---|
| 2178 | return error; | 
|---|
| 2179 |  | 
|---|
| 2180 | error = i915_gpu_coredump_alloc(i915, ALLOW_FAIL); | 
|---|
| 2181 | if (!error) | 
|---|
| 2182 | return ERR_PTR(error: -ENOMEM); | 
|---|
| 2183 |  | 
|---|
| 2184 | error->gt = intel_gt_coredump_alloc(gt, ALLOW_FAIL, dump_flags); | 
|---|
| 2185 | if (error->gt) { | 
|---|
| 2186 | struct i915_vma_compress *compress; | 
|---|
| 2187 |  | 
|---|
| 2188 | compress = i915_vma_capture_prepare(gt: error->gt); | 
|---|
| 2189 | if (!compress) { | 
|---|
| 2190 | kfree(objp: error->gt); | 
|---|
| 2191 | kfree(objp: error); | 
|---|
| 2192 | return ERR_PTR(error: -ENOMEM); | 
|---|
| 2193 | } | 
|---|
| 2194 |  | 
|---|
| 2195 | if (INTEL_INFO(i915)->has_gt_uc) { | 
|---|
| 2196 | error->gt->uc = gt_record_uc(gt: error->gt, compress); | 
|---|
| 2197 | if (error->gt->uc) { | 
|---|
| 2198 | if (dump_flags & CORE_DUMP_FLAG_IS_GUC_CAPTURE) | 
|---|
| 2199 | error->gt->uc->guc.is_guc_capture = true; | 
|---|
| 2200 | else | 
|---|
| 2201 | GEM_BUG_ON(error->gt->uc->guc.is_guc_capture); | 
|---|
| 2202 | } | 
|---|
| 2203 | } | 
|---|
| 2204 |  | 
|---|
| 2205 | gt_record_info(gt: error->gt); | 
|---|
| 2206 | gt_record_engines(gt: error->gt, engine_mask, compress, dump_flags); | 
|---|
| 2207 |  | 
|---|
| 2208 |  | 
|---|
| 2209 | i915_vma_capture_finish(gt: error->gt, compress); | 
|---|
| 2210 |  | 
|---|
| 2211 | error->simulated |= error->gt->simulated; | 
|---|
| 2212 | } | 
|---|
| 2213 |  | 
|---|
| 2214 | error->display_snapshot = intel_display_snapshot_capture(display); | 
|---|
| 2215 |  | 
|---|
| 2216 | return error; | 
|---|
| 2217 | } | 
|---|
| 2218 |  | 
|---|
| 2219 | static struct i915_gpu_coredump * | 
|---|
| 2220 | i915_gpu_coredump(struct intel_gt *gt, intel_engine_mask_t engine_mask, u32 dump_flags) | 
|---|
| 2221 | { | 
|---|
| 2222 | static DEFINE_MUTEX(capture_mutex); | 
|---|
| 2223 | int ret = mutex_lock_interruptible(lock: &capture_mutex); | 
|---|
| 2224 | struct i915_gpu_coredump *dump; | 
|---|
| 2225 |  | 
|---|
| 2226 | if (ret) | 
|---|
| 2227 | return ERR_PTR(error: ret); | 
|---|
| 2228 |  | 
|---|
| 2229 | dump = __i915_gpu_coredump(gt, engine_mask, dump_flags); | 
|---|
| 2230 | mutex_unlock(lock: &capture_mutex); | 
|---|
| 2231 |  | 
|---|
| 2232 | return dump; | 
|---|
| 2233 | } | 
|---|
| 2234 |  | 
|---|
| 2235 | void i915_error_state_store(struct i915_gpu_coredump *error) | 
|---|
| 2236 | { | 
|---|
| 2237 | struct drm_i915_private *i915; | 
|---|
| 2238 |  | 
|---|
| 2239 | if (IS_ERR_OR_NULL(ptr: error)) | 
|---|
| 2240 | return; | 
|---|
| 2241 |  | 
|---|
| 2242 | i915 = error->i915; | 
|---|
| 2243 | drm_info(&i915->drm, "%s\n", error_msg(error)); | 
|---|
| 2244 |  | 
|---|
| 2245 | if (error->simulated || | 
|---|
| 2246 | cmpxchg(&i915->gpu_error.first_error, NULL, error)) | 
|---|
| 2247 | return; | 
|---|
| 2248 |  | 
|---|
| 2249 | i915_gpu_coredump_get(gpu: error); | 
|---|
| 2250 |  | 
|---|
| 2251 | drm_info(&i915->drm, "GPU error state saved to /sys/class/drm/card%d/error\n", | 
|---|
| 2252 | i915->drm.primary->index); | 
|---|
| 2253 | } | 
|---|
| 2254 |  | 
|---|
| 2255 | /** | 
|---|
| 2256 | * i915_capture_error_state - capture an error record for later analysis | 
|---|
| 2257 | * @gt: intel_gt which originated the hang | 
|---|
| 2258 | * @engine_mask: hung engines | 
|---|
| 2259 | * @dump_flags: dump flags | 
|---|
| 2260 | * | 
|---|
| 2261 | * Should be called when an error is detected (either a hang or an error | 
|---|
| 2262 | * interrupt) to capture error state from the time of the error.  Fills | 
|---|
| 2263 | * out a structure which becomes available in debugfs for user level tools | 
|---|
| 2264 | * to pick up. | 
|---|
| 2265 | */ | 
|---|
| 2266 | void i915_capture_error_state(struct intel_gt *gt, | 
|---|
| 2267 | intel_engine_mask_t engine_mask, u32 dump_flags) | 
|---|
| 2268 | { | 
|---|
| 2269 | struct i915_gpu_coredump *error; | 
|---|
| 2270 |  | 
|---|
| 2271 | error = i915_gpu_coredump(gt, engine_mask, dump_flags); | 
|---|
| 2272 | if (IS_ERR(ptr: error)) { | 
|---|
| 2273 | cmpxchg(>->i915->gpu_error.first_error, NULL, error); | 
|---|
| 2274 | return; | 
|---|
| 2275 | } | 
|---|
| 2276 |  | 
|---|
| 2277 | i915_error_state_store(error); | 
|---|
| 2278 | i915_gpu_coredump_put(gpu: error); | 
|---|
| 2279 | } | 
|---|
| 2280 |  | 
|---|
| 2281 | static struct i915_gpu_coredump * | 
|---|
| 2282 | i915_first_error_state(struct drm_i915_private *i915) | 
|---|
| 2283 | { | 
|---|
| 2284 | struct i915_gpu_coredump *error; | 
|---|
| 2285 |  | 
|---|
| 2286 | spin_lock_irq(lock: &i915->gpu_error.lock); | 
|---|
| 2287 | error = i915->gpu_error.first_error; | 
|---|
| 2288 | if (!IS_ERR_OR_NULL(ptr: error)) | 
|---|
| 2289 | i915_gpu_coredump_get(gpu: error); | 
|---|
| 2290 | spin_unlock_irq(lock: &i915->gpu_error.lock); | 
|---|
| 2291 |  | 
|---|
| 2292 | return error; | 
|---|
| 2293 | } | 
|---|
| 2294 |  | 
|---|
| 2295 | void i915_reset_error_state(struct drm_i915_private *i915) | 
|---|
| 2296 | { | 
|---|
| 2297 | struct i915_gpu_coredump *error; | 
|---|
| 2298 |  | 
|---|
| 2299 | spin_lock_irq(lock: &i915->gpu_error.lock); | 
|---|
| 2300 | error = i915->gpu_error.first_error; | 
|---|
| 2301 | if (error != ERR_PTR(error: -ENODEV)) /* if disabled, always disabled */ | 
|---|
| 2302 | i915->gpu_error.first_error = NULL; | 
|---|
| 2303 | spin_unlock_irq(lock: &i915->gpu_error.lock); | 
|---|
| 2304 |  | 
|---|
| 2305 | if (!IS_ERR_OR_NULL(ptr: error)) | 
|---|
| 2306 | i915_gpu_coredump_put(gpu: error); | 
|---|
| 2307 | } | 
|---|
| 2308 |  | 
|---|
| 2309 | void i915_disable_error_state(struct drm_i915_private *i915, int err) | 
|---|
| 2310 | { | 
|---|
| 2311 | spin_lock_irq(lock: &i915->gpu_error.lock); | 
|---|
| 2312 | if (!i915->gpu_error.first_error) | 
|---|
| 2313 | i915->gpu_error.first_error = ERR_PTR(error: err); | 
|---|
| 2314 | spin_unlock_irq(lock: &i915->gpu_error.lock); | 
|---|
| 2315 | } | 
|---|
| 2316 |  | 
|---|
| 2317 | #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) | 
|---|
| 2318 | void intel_klog_error_capture(struct intel_gt *gt, | 
|---|
| 2319 | intel_engine_mask_t engine_mask) | 
|---|
| 2320 | { | 
|---|
| 2321 | static int g_count; | 
|---|
| 2322 | struct drm_i915_private *i915 = gt->i915; | 
|---|
| 2323 | struct i915_gpu_coredump *error; | 
|---|
| 2324 | intel_wakeref_t wakeref; | 
|---|
| 2325 | size_t buf_size = PAGE_SIZE * 128; | 
|---|
| 2326 | size_t pos_err; | 
|---|
| 2327 | char *buf, *ptr, *next; | 
|---|
| 2328 | int l_count = g_count++; | 
|---|
| 2329 | int line = 0; | 
|---|
| 2330 |  | 
|---|
| 2331 | /* Can't allocate memory during a reset */ | 
|---|
| 2332 | if (test_bit(I915_RESET_BACKOFF, >->reset.flags)) { | 
|---|
| 2333 | drm_err(>->i915->drm, "[Capture/%d.%d] Inside GT reset, skipping error capture :(\n", | 
|---|
| 2334 | l_count, line++); | 
|---|
| 2335 | return; | 
|---|
| 2336 | } | 
|---|
| 2337 |  | 
|---|
| 2338 | error = READ_ONCE(i915->gpu_error.first_error); | 
|---|
| 2339 | if (error) { | 
|---|
| 2340 | drm_err(&i915->drm, "[Capture/%d.%d] Clearing existing error capture first...\n", | 
|---|
| 2341 | l_count, line++); | 
|---|
| 2342 | i915_reset_error_state(i915); | 
|---|
| 2343 | } | 
|---|
| 2344 |  | 
|---|
| 2345 | with_intel_runtime_pm(&i915->runtime_pm, wakeref) | 
|---|
| 2346 | error = i915_gpu_coredump(gt, engine_mask, CORE_DUMP_FLAG_NONE); | 
|---|
| 2347 |  | 
|---|
| 2348 | if (IS_ERR(error)) { | 
|---|
| 2349 | drm_err(&i915->drm, "[Capture/%d.%d] Failed to capture error capture: %ld!\n", | 
|---|
| 2350 | l_count, line++, PTR_ERR(error)); | 
|---|
| 2351 | return; | 
|---|
| 2352 | } | 
|---|
| 2353 |  | 
|---|
| 2354 | buf = kvmalloc(buf_size, GFP_KERNEL); | 
|---|
| 2355 | if (!buf) { | 
|---|
| 2356 | drm_err(&i915->drm, "[Capture/%d.%d] Failed to allocate buffer for error capture!\n", | 
|---|
| 2357 | l_count, line++); | 
|---|
| 2358 | i915_gpu_coredump_put(error); | 
|---|
| 2359 | return; | 
|---|
| 2360 | } | 
|---|
| 2361 |  | 
|---|
| 2362 | drm_info(&i915->drm, "[Capture/%d.%d] Dumping i915 error capture for %ps...\n", | 
|---|
| 2363 | l_count, line++, __builtin_return_address(0)); | 
|---|
| 2364 |  | 
|---|
| 2365 | /* Largest string length safe to print via dmesg */ | 
|---|
| 2366 | #	define MAX_CHUNK	800 | 
|---|
| 2367 |  | 
|---|
| 2368 | pos_err = 0; | 
|---|
| 2369 | while (1) { | 
|---|
| 2370 | ssize_t got = i915_gpu_coredump_copy_to_buffer(error, buf, pos_err, buf_size - 1); | 
|---|
| 2371 |  | 
|---|
| 2372 | if (got <= 0) | 
|---|
| 2373 | break; | 
|---|
| 2374 |  | 
|---|
| 2375 | buf[got] = 0; | 
|---|
| 2376 | pos_err += got; | 
|---|
| 2377 |  | 
|---|
| 2378 | ptr = buf; | 
|---|
| 2379 | while (got > 0) { | 
|---|
| 2380 | size_t count; | 
|---|
| 2381 | char tag[2]; | 
|---|
| 2382 |  | 
|---|
| 2383 | next = strnchr(ptr, got, '\n'); | 
|---|
| 2384 | if (next) { | 
|---|
| 2385 | count = next - ptr; | 
|---|
| 2386 | *next = 0; | 
|---|
| 2387 | tag[0] = '>'; | 
|---|
| 2388 | tag[1] = '<'; | 
|---|
| 2389 | } else { | 
|---|
| 2390 | count = got; | 
|---|
| 2391 | tag[0] = '}'; | 
|---|
| 2392 | tag[1] = '{'; | 
|---|
| 2393 | } | 
|---|
| 2394 |  | 
|---|
| 2395 | if (count > MAX_CHUNK) { | 
|---|
| 2396 | size_t pos; | 
|---|
| 2397 | char *ptr2 = ptr; | 
|---|
| 2398 |  | 
|---|
| 2399 | for (pos = MAX_CHUNK; pos < count; pos += MAX_CHUNK) { | 
|---|
| 2400 | char chr = ptr[pos]; | 
|---|
| 2401 |  | 
|---|
| 2402 | ptr[pos] = 0; | 
|---|
| 2403 | drm_info(&i915->drm, "[Capture/%d.%d] }%s{\n", | 
|---|
| 2404 | l_count, line++, ptr2); | 
|---|
| 2405 | ptr[pos] = chr; | 
|---|
| 2406 | ptr2 = ptr + pos; | 
|---|
| 2407 |  | 
|---|
| 2408 | /* | 
|---|
| 2409 | * If spewing large amounts of data via a serial console, | 
|---|
| 2410 | * this can be a very slow process. So be friendly and try | 
|---|
| 2411 | * not to cause 'softlockup on CPU' problems. | 
|---|
| 2412 | */ | 
|---|
| 2413 | cond_resched(); | 
|---|
| 2414 | } | 
|---|
| 2415 |  | 
|---|
| 2416 | if (ptr2 < (ptr + count)) | 
|---|
| 2417 | drm_info(&i915->drm, "[Capture/%d.%d] %c%s%c\n", | 
|---|
| 2418 | l_count, line++, tag[0], ptr2, tag[1]); | 
|---|
| 2419 | else if (tag[0] == '>') | 
|---|
| 2420 | drm_info(&i915->drm, "[Capture/%d.%d] ><\n", | 
|---|
| 2421 | l_count, line++); | 
|---|
| 2422 | } else { | 
|---|
| 2423 | drm_info(&i915->drm, "[Capture/%d.%d] %c%s%c\n", | 
|---|
| 2424 | l_count, line++, tag[0], ptr, tag[1]); | 
|---|
| 2425 | } | 
|---|
| 2426 |  | 
|---|
| 2427 | ptr = next; | 
|---|
| 2428 | got -= count; | 
|---|
| 2429 | if (next) { | 
|---|
| 2430 | ptr++; | 
|---|
| 2431 | got--; | 
|---|
| 2432 | } | 
|---|
| 2433 |  | 
|---|
| 2434 | /* As above. */ | 
|---|
| 2435 | cond_resched(); | 
|---|
| 2436 | } | 
|---|
| 2437 |  | 
|---|
| 2438 | if (got) | 
|---|
| 2439 | drm_info(&i915->drm, "[Capture/%d.%d] Got %zd bytes remaining!\n", | 
|---|
| 2440 | l_count, line++, got); | 
|---|
| 2441 | } | 
|---|
| 2442 |  | 
|---|
| 2443 | kvfree(buf); | 
|---|
| 2444 |  | 
|---|
| 2445 | drm_info(&i915->drm, "[Capture/%d.%d] Dumped %zd bytes\n", l_count, line++, pos_err); | 
|---|
| 2446 | } | 
|---|
| 2447 | #endif | 
|---|
| 2448 |  | 
|---|
| 2449 | static ssize_t gpu_state_read(struct file *file, char __user *ubuf, | 
|---|
| 2450 | size_t count, loff_t *pos) | 
|---|
| 2451 | { | 
|---|
| 2452 | struct i915_gpu_coredump *error; | 
|---|
| 2453 | ssize_t ret; | 
|---|
| 2454 | void *buf; | 
|---|
| 2455 |  | 
|---|
| 2456 | error = file->private_data; | 
|---|
| 2457 | if (!error) | 
|---|
| 2458 | return 0; | 
|---|
| 2459 |  | 
|---|
| 2460 | /* Bounce buffer required because of kernfs __user API convenience. */ | 
|---|
| 2461 | buf = kmalloc(count, GFP_KERNEL); | 
|---|
| 2462 | if (!buf) | 
|---|
| 2463 | return -ENOMEM; | 
|---|
| 2464 |  | 
|---|
| 2465 | ret = i915_gpu_coredump_copy_to_buffer(error, buf, off: *pos, rem: count); | 
|---|
| 2466 | if (ret <= 0) | 
|---|
| 2467 | goto out; | 
|---|
| 2468 |  | 
|---|
| 2469 | if (!copy_to_user(to: ubuf, from: buf, n: ret)) | 
|---|
| 2470 | *pos += ret; | 
|---|
| 2471 | else | 
|---|
| 2472 | ret = -EFAULT; | 
|---|
| 2473 |  | 
|---|
| 2474 | out: | 
|---|
| 2475 | kfree(objp: buf); | 
|---|
| 2476 | return ret; | 
|---|
| 2477 | } | 
|---|
| 2478 |  | 
|---|
| 2479 | static int gpu_state_release(struct inode *inode, struct file *file) | 
|---|
| 2480 | { | 
|---|
| 2481 | i915_gpu_coredump_put(gpu: file->private_data); | 
|---|
| 2482 | return 0; | 
|---|
| 2483 | } | 
|---|
| 2484 |  | 
|---|
| 2485 | static int i915_gpu_info_open(struct inode *inode, struct file *file) | 
|---|
| 2486 | { | 
|---|
| 2487 | struct drm_i915_private *i915 = inode->i_private; | 
|---|
| 2488 | struct i915_gpu_coredump *gpu; | 
|---|
| 2489 | intel_wakeref_t wakeref; | 
|---|
| 2490 |  | 
|---|
| 2491 | gpu = NULL; | 
|---|
| 2492 | with_intel_runtime_pm(&i915->runtime_pm, wakeref) | 
|---|
| 2493 | gpu = i915_gpu_coredump(gt: to_gt(i915), ALL_ENGINES, CORE_DUMP_FLAG_NONE); | 
|---|
| 2494 |  | 
|---|
| 2495 | if (IS_ERR(ptr: gpu)) | 
|---|
| 2496 | return PTR_ERR(ptr: gpu); | 
|---|
| 2497 |  | 
|---|
| 2498 | file->private_data = gpu; | 
|---|
| 2499 | return 0; | 
|---|
| 2500 | } | 
|---|
| 2501 |  | 
|---|
| 2502 | static const struct file_operations i915_gpu_info_fops = { | 
|---|
| 2503 | .owner = THIS_MODULE, | 
|---|
| 2504 | .open = i915_gpu_info_open, | 
|---|
| 2505 | .read = gpu_state_read, | 
|---|
| 2506 | .llseek = default_llseek, | 
|---|
| 2507 | .release = gpu_state_release, | 
|---|
| 2508 | }; | 
|---|
| 2509 |  | 
|---|
| 2510 | static ssize_t | 
|---|
| 2511 | i915_error_state_write(struct file *filp, | 
|---|
| 2512 | const char __user *ubuf, | 
|---|
| 2513 | size_t cnt, | 
|---|
| 2514 | loff_t *ppos) | 
|---|
| 2515 | { | 
|---|
| 2516 | struct i915_gpu_coredump *error = filp->private_data; | 
|---|
| 2517 |  | 
|---|
| 2518 | if (!error) | 
|---|
| 2519 | return 0; | 
|---|
| 2520 |  | 
|---|
| 2521 | drm_dbg(&error->i915->drm, "Resetting error state\n"); | 
|---|
| 2522 | i915_reset_error_state(i915: error->i915); | 
|---|
| 2523 |  | 
|---|
| 2524 | return cnt; | 
|---|
| 2525 | } | 
|---|
| 2526 |  | 
|---|
| 2527 | static int i915_error_state_open(struct inode *inode, struct file *file) | 
|---|
| 2528 | { | 
|---|
| 2529 | struct i915_gpu_coredump *error; | 
|---|
| 2530 |  | 
|---|
| 2531 | error = i915_first_error_state(i915: inode->i_private); | 
|---|
| 2532 | if (IS_ERR(ptr: error)) | 
|---|
| 2533 | return PTR_ERR(ptr: error); | 
|---|
| 2534 |  | 
|---|
| 2535 | file->private_data  = error; | 
|---|
| 2536 | return 0; | 
|---|
| 2537 | } | 
|---|
| 2538 |  | 
|---|
| 2539 | static const struct file_operations i915_error_state_fops = { | 
|---|
| 2540 | .owner = THIS_MODULE, | 
|---|
| 2541 | .open = i915_error_state_open, | 
|---|
| 2542 | .read = gpu_state_read, | 
|---|
| 2543 | .write = i915_error_state_write, | 
|---|
| 2544 | .llseek = default_llseek, | 
|---|
| 2545 | .release = gpu_state_release, | 
|---|
| 2546 | }; | 
|---|
| 2547 |  | 
|---|
| 2548 | void i915_gpu_error_debugfs_register(struct drm_i915_private *i915) | 
|---|
| 2549 | { | 
|---|
| 2550 | struct dentry *debugfs_root = i915->drm.debugfs_root; | 
|---|
| 2551 |  | 
|---|
| 2552 | debugfs_create_file( "i915_error_state", 0644, debugfs_root, i915, | 
|---|
| 2553 | &i915_error_state_fops); | 
|---|
| 2554 | debugfs_create_file( "i915_gpu_info", 0644, debugfs_root, i915, | 
|---|
| 2555 | &i915_gpu_info_fops); | 
|---|
| 2556 | } | 
|---|
| 2557 |  | 
|---|
| 2558 | static ssize_t error_state_read(struct file *filp, struct kobject *kobj, | 
|---|
| 2559 | const struct bin_attribute *attr, char *buf, | 
|---|
| 2560 | loff_t off, size_t count) | 
|---|
| 2561 | { | 
|---|
| 2562 |  | 
|---|
| 2563 | struct device *kdev = kobj_to_dev(kobj); | 
|---|
| 2564 | struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); | 
|---|
| 2565 | struct i915_gpu_coredump *gpu; | 
|---|
| 2566 | ssize_t ret = 0; | 
|---|
| 2567 |  | 
|---|
| 2568 | /* | 
|---|
| 2569 | * FIXME: Concurrent clients triggering resets and reading + clearing | 
|---|
| 2570 | * dumps can cause inconsistent sysfs reads when a user calls in with a | 
|---|
| 2571 | * non-zero offset to complete a prior partial read but the | 
|---|
| 2572 | * gpu_coredump has been cleared or replaced. | 
|---|
| 2573 | */ | 
|---|
| 2574 |  | 
|---|
| 2575 | gpu = i915_first_error_state(i915); | 
|---|
| 2576 | if (IS_ERR(ptr: gpu)) { | 
|---|
| 2577 | ret = PTR_ERR(ptr: gpu); | 
|---|
| 2578 | } else if (gpu) { | 
|---|
| 2579 | ret = i915_gpu_coredump_copy_to_buffer(error: gpu, buf, off, rem: count); | 
|---|
| 2580 | i915_gpu_coredump_put(gpu); | 
|---|
| 2581 | } else { | 
|---|
| 2582 | const char *str = "No error state collected\n"; | 
|---|
| 2583 | size_t len = strlen(str); | 
|---|
| 2584 |  | 
|---|
| 2585 | if (off < len) { | 
|---|
| 2586 | ret = min_t(size_t, count, len - off); | 
|---|
| 2587 | memcpy(to: buf, from: str + off, len: ret); | 
|---|
| 2588 | } | 
|---|
| 2589 | } | 
|---|
| 2590 |  | 
|---|
| 2591 | return ret; | 
|---|
| 2592 | } | 
|---|
| 2593 |  | 
|---|
| 2594 | static ssize_t error_state_write(struct file *file, struct kobject *kobj, | 
|---|
| 2595 | const struct bin_attribute *attr, char *buf, | 
|---|
| 2596 | loff_t off, size_t count) | 
|---|
| 2597 | { | 
|---|
| 2598 | struct device *kdev = kobj_to_dev(kobj); | 
|---|
| 2599 | struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); | 
|---|
| 2600 |  | 
|---|
| 2601 | drm_dbg(&dev_priv->drm, "Resetting error state\n"); | 
|---|
| 2602 | i915_reset_error_state(i915: dev_priv); | 
|---|
| 2603 |  | 
|---|
| 2604 | return count; | 
|---|
| 2605 | } | 
|---|
| 2606 |  | 
|---|
| 2607 | static const struct bin_attribute error_state_attr = { | 
|---|
| 2608 | .attr.name = "error", | 
|---|
| 2609 | .attr.mode = S_IRUSR | S_IWUSR, | 
|---|
| 2610 | .size = 0, | 
|---|
| 2611 | .read = error_state_read, | 
|---|
| 2612 | .write = error_state_write, | 
|---|
| 2613 | }; | 
|---|
| 2614 |  | 
|---|
| 2615 | void i915_gpu_error_sysfs_setup(struct drm_i915_private *i915) | 
|---|
| 2616 | { | 
|---|
| 2617 | struct device *kdev = i915->drm.primary->kdev; | 
|---|
| 2618 |  | 
|---|
| 2619 | if (sysfs_create_bin_file(kobj: &kdev->kobj, attr: &error_state_attr)) | 
|---|
| 2620 | drm_err(&i915->drm, "error_state sysfs setup failed\n"); | 
|---|
| 2621 | } | 
|---|
| 2622 |  | 
|---|
| 2623 | void i915_gpu_error_sysfs_teardown(struct drm_i915_private *i915) | 
|---|
| 2624 | { | 
|---|
| 2625 | struct device *kdev = i915->drm.primary->kdev; | 
|---|
| 2626 |  | 
|---|
| 2627 | sysfs_remove_bin_file(kobj: &kdev->kobj, attr: &error_state_attr); | 
|---|
| 2628 | } | 
|---|
| 2629 |  | 
|---|