1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2015-2018 Etnaviv Project
4  */
5 
6 #include <linux/devcoredump.h>
7 #include <linux/moduleparam.h>
8 
9 #include "etnaviv_cmdbuf.h"
10 #include "etnaviv_dump.h"
11 #include "etnaviv_gem.h"
12 #include "etnaviv_gpu.h"
13 #include "etnaviv_mmu.h"
14 #include "etnaviv_sched.h"
15 #include "state.xml.h"
16 #include "state_hi.xml.h"
17 
18 static bool etnaviv_dump_core = true;
19 module_param_named(dump_core, etnaviv_dump_core, bool, 0600);
20 
21 struct core_dump_iterator {
22 	void *start;
23 	struct etnaviv_dump_object_header *hdr;
24 	void *data;
25 };
26 
27 static const unsigned short etnaviv_dump_registers[] = {
28 	VIVS_HI_AXI_STATUS,
29 	VIVS_HI_CLOCK_CONTROL,
30 	VIVS_HI_IDLE_STATE,
31 	VIVS_HI_AXI_CONFIG,
32 	VIVS_HI_INTR_ENBL,
33 	VIVS_HI_CHIP_IDENTITY,
34 	VIVS_HI_CHIP_FEATURE,
35 	VIVS_HI_CHIP_MODEL,
36 	VIVS_HI_CHIP_REV,
37 	VIVS_HI_CHIP_DATE,
38 	VIVS_HI_CHIP_TIME,
39 	VIVS_HI_CHIP_MINOR_FEATURE_0,
40 	VIVS_HI_CACHE_CONTROL,
41 	VIVS_HI_AXI_CONTROL,
42 	VIVS_PM_POWER_CONTROLS,
43 	VIVS_PM_MODULE_CONTROLS,
44 	VIVS_PM_MODULE_STATUS,
45 	VIVS_PM_PULSE_EATER,
46 	VIVS_MC_MMU_FE_PAGE_TABLE,
47 	VIVS_MC_MMU_TX_PAGE_TABLE,
48 	VIVS_MC_MMU_PE_PAGE_TABLE,
49 	VIVS_MC_MMU_PEZ_PAGE_TABLE,
50 	VIVS_MC_MMU_RA_PAGE_TABLE,
51 	VIVS_MC_DEBUG_MEMORY,
52 	VIVS_MC_MEMORY_BASE_ADDR_RA,
53 	VIVS_MC_MEMORY_BASE_ADDR_FE,
54 	VIVS_MC_MEMORY_BASE_ADDR_TX,
55 	VIVS_MC_MEMORY_BASE_ADDR_PEZ,
56 	VIVS_MC_MEMORY_BASE_ADDR_PE,
57 	VIVS_MC_MEMORY_TIMING_CONTROL,
58 	VIVS_MC_BUS_CONFIG,
59 	VIVS_FE_DMA_STATUS,
60 	VIVS_FE_DMA_DEBUG_STATE,
61 	VIVS_FE_DMA_ADDRESS,
62 	VIVS_FE_DMA_LOW,
63 	VIVS_FE_DMA_HIGH,
64 	VIVS_FE_AUTO_FLUSH,
65 };
66 
67 static void etnaviv_core_dump_header(struct core_dump_iterator *iter,
68 	u32 type, void *data_end)
69 {
70 	struct etnaviv_dump_object_header *hdr = iter->hdr;
71 
72 	hdr->magic = cpu_to_le32(ETDUMP_MAGIC);
73 	hdr->type = cpu_to_le32(type);
74 	hdr->file_offset = cpu_to_le32(iter->data - iter->start);
75 	hdr->file_size = cpu_to_le32(data_end - iter->data);
76 
77 	iter->hdr++;
78 	iter->data += hdr->file_size;
79 }
80 
81 static void etnaviv_core_dump_registers(struct core_dump_iterator *iter,
82 	struct etnaviv_gpu *gpu)
83 {
84 	struct etnaviv_dump_registers *reg = iter->data;
85 	unsigned int i;
86 
87 	for (i = 0; i < ARRAY_SIZE(etnaviv_dump_registers); i++, reg++) {
88 		reg->reg = etnaviv_dump_registers[i];
89 		reg->value = gpu_read(gpu, etnaviv_dump_registers[i]);
90 	}
91 
92 	etnaviv_core_dump_header(iter, ETDUMP_BUF_REG, reg);
93 }
94 
95 static void etnaviv_core_dump_mmu(struct core_dump_iterator *iter,
96 	struct etnaviv_iommu_context *mmu, size_t mmu_size)
97 {
98 	etnaviv_iommu_dump(mmu, iter->data);
99 
100 	etnaviv_core_dump_header(iter, ETDUMP_BUF_MMU, iter->data + mmu_size);
101 }
102 
103 static void etnaviv_core_dump_mem(struct core_dump_iterator *iter, u32 type,
104 	void *ptr, size_t size, u64 iova)
105 {
106 	memcpy(iter->data, ptr, size);
107 
108 	iter->hdr->iova = cpu_to_le64(iova);
109 
110 	etnaviv_core_dump_header(iter, type, iter->data + size);
111 }
112 
113 void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
114 {
115 	struct etnaviv_gpu *gpu = submit->gpu;
116 	struct core_dump_iterator iter;
117 	struct etnaviv_gem_object *obj;
118 	unsigned int n_obj, n_bomap_pages;
119 	size_t file_size, mmu_size;
120 	__le64 *bomap, *bomap_start;
121 	int i;
122 
123 	/* Only catch the first event, or when manually re-armed */
124 	if (!etnaviv_dump_core)
125 		return;
126 	etnaviv_dump_core = false;
127 
128 	mutex_lock(&gpu->mmu_context->lock);
129 
130 	mmu_size = etnaviv_iommu_dump_size(gpu->mmu_context);
131 
132 	/* We always dump registers, mmu, ring, hanging cmdbuf and end marker */
133 	n_obj = 5;
134 	n_bomap_pages = 0;
135 	file_size = ARRAY_SIZE(etnaviv_dump_registers) *
136 			sizeof(struct etnaviv_dump_registers) +
137 		    mmu_size + gpu->buffer.size + submit->cmdbuf.size;
138 
139 	/* Add in the active buffer objects */
140 	for (i = 0; i < submit->nr_bos; i++) {
141 		obj = submit->bos[i].obj;
142 		file_size += obj->base.size;
143 		n_bomap_pages += obj->base.size >> PAGE_SHIFT;
144 		n_obj++;
145 	}
146 
147 	/* If we have any buffer objects, add a bomap object */
148 	if (n_bomap_pages) {
149 		file_size += n_bomap_pages * sizeof(__le64);
150 		n_obj++;
151 	}
152 
153 	/* Add the size of the headers */
154 	file_size += sizeof(*iter.hdr) * n_obj;
155 
156 	/* Allocate the file in vmalloc memory, it's likely to be big */
157 	iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY,
158 			       PAGE_KERNEL);
159 	if (!iter.start) {
160 		mutex_unlock(&gpu->mmu_context->lock);
161 		dev_warn(gpu->dev, "failed to allocate devcoredump file\n");
162 		return;
163 	}
164 
165 	/* Point the data member after the headers */
166 	iter.hdr = iter.start;
167 	iter.data = &iter.hdr[n_obj];
168 
169 	memset(iter.hdr, 0, iter.data - iter.start);
170 
171 	etnaviv_core_dump_registers(&iter, gpu);
172 	etnaviv_core_dump_mmu(&iter, gpu->mmu_context, mmu_size);
173 	etnaviv_core_dump_mem(&iter, ETDUMP_BUF_RING, gpu->buffer.vaddr,
174 			      gpu->buffer.size,
175 			      etnaviv_cmdbuf_get_va(&gpu->buffer,
176 					&gpu->mmu_context->cmdbuf_mapping));
177 
178 	etnaviv_core_dump_mem(&iter, ETDUMP_BUF_CMD,
179 			      submit->cmdbuf.vaddr, submit->cmdbuf.size,
180 			      etnaviv_cmdbuf_get_va(&submit->cmdbuf,
181 					&gpu->mmu_context->cmdbuf_mapping));
182 
183 	mutex_unlock(&gpu->mmu_context->lock);
184 
185 	/* Reserve space for the bomap */
186 	if (n_bomap_pages) {
187 		bomap_start = bomap = iter.data;
188 		memset(bomap, 0, sizeof(*bomap) * n_bomap_pages);
189 		etnaviv_core_dump_header(&iter, ETDUMP_BUF_BOMAP,
190 					 bomap + n_bomap_pages);
191 	} else {
192 		/* Silence warning */
193 		bomap_start = bomap = NULL;
194 	}
195 
196 	for (i = 0; i < submit->nr_bos; i++) {
197 		struct etnaviv_vram_mapping *vram;
198 		struct page **pages;
199 		void *vaddr;
200 
201 		obj = submit->bos[i].obj;
202 		vram = submit->bos[i].mapping;
203 
204 		mutex_lock(&obj->lock);
205 		pages = etnaviv_gem_get_pages(obj);
206 		mutex_unlock(&obj->lock);
207 		if (!IS_ERR(pages)) {
208 			int j;
209 
210 			iter.hdr->data[0] = bomap - bomap_start;
211 
212 			for (j = 0; j < obj->base.size >> PAGE_SHIFT; j++)
213 				*bomap++ = cpu_to_le64(page_to_phys(*pages++));
214 		}
215 
216 		iter.hdr->iova = cpu_to_le64(vram->iova);
217 
218 		vaddr = etnaviv_gem_vmap(&obj->base);
219 		if (vaddr)
220 			memcpy(iter.data, vaddr, obj->base.size);
221 
222 		etnaviv_core_dump_header(&iter, ETDUMP_BUF_BO, iter.data +
223 					 obj->base.size);
224 	}
225 
226 	etnaviv_core_dump_header(&iter, ETDUMP_BUF_END, iter.data);
227 
228 	dev_coredumpv(gpu->dev, iter.start, iter.data - iter.start, GFP_KERNEL);
229 }
230