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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Qualcomm Peripheral Image Loader
4 *
5 * Copyright (C) 2016 Linaro Ltd
6 * Copyright (C) 2015 Sony Mobile Communications Inc
7 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
8 */
9
10#include <linux/device.h>
11#include <linux/elf.h>
12#include <linux/firmware.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/qcom_scm.h>
16#include <linux/sizes.h>
17#include <linux/slab.h>
18#include <linux/soc/qcom/mdt_loader.h>
19
20static bool mdt_phdr_valid(const struct elf32_phdr *phdr)
21{
22 if (phdr->p_type != PT_LOAD)
23 return false;
24
25 if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
26 return false;
27
28 if (!phdr->p_memsz)
29 return false;
30
31 return true;
32}
33
34/**
35 * qcom_mdt_get_size() - acquire size of the memory region needed to load mdt
36 * @fw: firmware object for the mdt file
37 *
38 * Returns size of the loaded firmware blob, or -EINVAL on failure.
39 */
40ssize_t qcom_mdt_get_size(const struct firmware *fw)
41{
42 const struct elf32_phdr *phdrs;
43 const struct elf32_phdr *phdr;
44 const struct elf32_hdr *ehdr;
45 phys_addr_t min_addr = PHYS_ADDR_MAX;
46 phys_addr_t max_addr = 0;
47 int i;
48
49 ehdr = (struct elf32_hdr *)fw->data;
50 phdrs = (struct elf32_phdr *)(ehdr + 1);
51
52 for (i = 0; i < ehdr->e_phnum; i++) {
53 phdr = &phdrs[i];
54
55 if (!mdt_phdr_valid(phdr))
56 continue;
57
58 if (phdr->p_paddr < min_addr)
59 min_addr = phdr->p_paddr;
60
61 if (phdr->p_paddr + phdr->p_memsz > max_addr)
62 max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
63 }
64
65 return min_addr < max_addr ? max_addr - min_addr : -EINVAL;
66}
67EXPORT_SYMBOL_GPL(qcom_mdt_get_size);
68
69/**
70 * qcom_mdt_read_metadata() - read header and metadata from mdt or mbn
71 * @fw: firmware of mdt header or mbn
72 * @data_len: length of the read metadata blob
73 *
74 * The mechanism that performs the authentication of the loading firmware
75 * expects an ELF header directly followed by the segment of hashes, with no
76 * padding inbetween. This function allocates a chunk of memory for this pair
77 * and copy the two pieces into the buffer.
78 *
79 * In the case of split firmware the hash is found directly following the ELF
80 * header, rather than at p_offset described by the second program header.
81 *
82 * The caller is responsible to free (kfree()) the returned pointer.
83 *
84 * Return: pointer to data, or ERR_PTR()
85 */
86void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len)
87{
88 const struct elf32_phdr *phdrs;
89 const struct elf32_hdr *ehdr;
90 size_t hash_offset;
91 size_t hash_size;
92 size_t ehdr_size;
93 void *data;
94
95 ehdr = (struct elf32_hdr *)fw->data;
96 phdrs = (struct elf32_phdr *)(ehdr + 1);
97
98 if (ehdr->e_phnum < 2)
99 return ERR_PTR(-EINVAL);
100
101 if (phdrs[0].p_type == PT_LOAD || phdrs[1].p_type == PT_LOAD)
102 return ERR_PTR(-EINVAL);
103
104 if ((phdrs[1].p_flags & QCOM_MDT_TYPE_MASK) != QCOM_MDT_TYPE_HASH)
105 return ERR_PTR(-EINVAL);
106
107 ehdr_size = phdrs[0].p_filesz;
108 hash_size = phdrs[1].p_filesz;
109
110 data = kmalloc(ehdr_size + hash_size, GFP_KERNEL);
111 if (!data)
112 return ERR_PTR(-ENOMEM);
113
114 /* Is the header and hash already packed */
115 if (ehdr_size + hash_size == fw->size)
116 hash_offset = phdrs[0].p_filesz;
117 else
118 hash_offset = phdrs[1].p_offset;
119
120 memcpy(data, fw->data, ehdr_size);
121 memcpy(data + ehdr_size, fw->data + hash_offset, hash_size);
122
123 *data_len = ehdr_size + hash_size;
124
125 return data;
126}
127EXPORT_SYMBOL_GPL(qcom_mdt_read_metadata);
128
129static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
130 const char *firmware, int pas_id, void *mem_region,
131 phys_addr_t mem_phys, size_t mem_size,
132 phys_addr_t *reloc_base, bool pas_init)
133{
134 const struct elf32_phdr *phdrs;
135 const struct elf32_phdr *phdr;
136 const struct elf32_hdr *ehdr;
137 const struct firmware *seg_fw;
138 phys_addr_t mem_reloc;
139 phys_addr_t min_addr = PHYS_ADDR_MAX;
140 phys_addr_t max_addr = 0;
141 size_t metadata_len;
142 size_t fw_name_len;
143 ssize_t offset;
144 void *metadata;
145 char *fw_name;
146 bool relocate = false;
147 void *ptr;
148 int ret = 0;
149 int i;
150
151 if (!fw || !mem_region || !mem_phys || !mem_size)
152 return -EINVAL;
153
154 ehdr = (struct elf32_hdr *)fw->data;
155 phdrs = (struct elf32_phdr *)(ehdr + 1);
156
157 fw_name_len = strlen(firmware);
158 if (fw_name_len <= 4)
159 return -EINVAL;
160
161 fw_name = kstrdup(firmware, GFP_KERNEL);
162 if (!fw_name)
163 return -ENOMEM;
164
165 if (pas_init) {
166 metadata = qcom_mdt_read_metadata(fw, &metadata_len);
167 if (IS_ERR(metadata)) {
168 ret = PTR_ERR(metadata);
169 goto out;
170 }
171
172 ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len);
173
174 kfree(metadata);
175 if (ret) {
176 dev_err(dev, "invalid firmware metadata\n");
177 goto out;
178 }
179 }
180
181 for (i = 0; i < ehdr->e_phnum; i++) {
182 phdr = &phdrs[i];
183
184 if (!mdt_phdr_valid(phdr))
185 continue;
186
187 if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
188 relocate = true;
189
190 if (phdr->p_paddr < min_addr)
191 min_addr = phdr->p_paddr;
192
193 if (phdr->p_paddr + phdr->p_memsz > max_addr)
194 max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
195 }
196
197 if (relocate) {
198 if (pas_init) {
199 ret = qcom_scm_pas_mem_setup(pas_id, mem_phys,
200 max_addr - min_addr);
201 if (ret) {
202 dev_err(dev, "unable to setup relocation\n");
203 goto out;
204 }
205 }
206
207 /*
208 * The image is relocatable, so offset each segment based on
209 * the lowest segment address.
210 */
211 mem_reloc = min_addr;
212 } else {
213 /*
214 * Image is not relocatable, so offset each segment based on
215 * the allocated physical chunk of memory.
216 */
217 mem_reloc = mem_phys;
218 }
219
220 for (i = 0; i < ehdr->e_phnum; i++) {
221 phdr = &phdrs[i];
222
223 if (!mdt_phdr_valid(phdr))
224 continue;
225
226 offset = phdr->p_paddr - mem_reloc;
227 if (offset < 0 || offset + phdr->p_memsz > mem_size) {
228 dev_err(dev, "segment outside memory range\n");
229 ret = -EINVAL;
230 break;
231 }
232
233 ptr = mem_region + offset;
234
235 if (phdr->p_filesz && phdr->p_offset < fw->size) {
236 /* Firmware is large enough to be non-split */
237 if (phdr->p_offset + phdr->p_filesz > fw->size) {
238 dev_err(dev,
239 "failed to load segment %d from truncated file %s\n",
240 i, firmware);
241 ret = -EINVAL;
242 break;
243 }
244
245 memcpy(ptr, fw->data + phdr->p_offset, phdr->p_filesz);
246 } else if (phdr->p_filesz) {
247 /* Firmware not large enough, load split-out segments */
248 sprintf(fw_name + fw_name_len - 3, "b%02d", i);
249 ret = request_firmware_into_buf(&seg_fw, fw_name, dev,
250 ptr, phdr->p_filesz);
251 if (ret) {
252 dev_err(dev, "failed to load %s\n", fw_name);
253 break;
254 }
255
256 release_firmware(seg_fw);
257 }
258
259 if (phdr->p_memsz > phdr->p_filesz)
260 memset(ptr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
261 }
262
263 if (reloc_base)
264 *reloc_base = mem_reloc;
265
266out:
267 kfree(fw_name);
268
269 return ret;
270}
271
272/**
273 * qcom_mdt_load() - load the firmware which header is loaded as fw
274 * @dev: device handle to associate resources with
275 * @fw: firmware object for the mdt file
276 * @firmware: name of the firmware, for construction of segment file names
277 * @pas_id: PAS identifier
278 * @mem_region: allocated memory region to load firmware into
279 * @mem_phys: physical address of allocated memory region
280 * @mem_size: size of the allocated memory region
281 * @reloc_base: adjusted physical address after relocation
282 *
283 * Returns 0 on success, negative errno otherwise.
284 */
285int qcom_mdt_load(struct device *dev, const struct firmware *fw,
286 const char *firmware, int pas_id, void *mem_region,
287 phys_addr_t mem_phys, size_t mem_size,
288 phys_addr_t *reloc_base)
289{
290 return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
291 mem_size, reloc_base, true);
292}
293EXPORT_SYMBOL_GPL(qcom_mdt_load);
294
295/**
296 * qcom_mdt_load_no_init() - load the firmware which header is loaded as fw
297 * @dev: device handle to associate resources with
298 * @fw: firmware object for the mdt file
299 * @firmware: name of the firmware, for construction of segment file names
300 * @pas_id: PAS identifier
301 * @mem_region: allocated memory region to load firmware into
302 * @mem_phys: physical address of allocated memory region
303 * @mem_size: size of the allocated memory region
304 * @reloc_base: adjusted physical address after relocation
305 *
306 * Returns 0 on success, negative errno otherwise.
307 */
308int qcom_mdt_load_no_init(struct device *dev, const struct firmware *fw,
309 const char *firmware, int pas_id,
310 void *mem_region, phys_addr_t mem_phys,
311 size_t mem_size, phys_addr_t *reloc_base)
312{
313 return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
314 mem_size, reloc_base, false);
315}
316EXPORT_SYMBOL_GPL(qcom_mdt_load_no_init);
317
318MODULE_DESCRIPTION("Firmware parser for Qualcomm MDT format");
319MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Qualcomm Peripheral Image Loader
4 *
5 * Copyright (C) 2016 Linaro Ltd
6 * Copyright (C) 2015 Sony Mobile Communications Inc
7 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
8 */
9
10#include <linux/cleanup.h>
11#include <linux/device.h>
12#include <linux/elf.h>
13#include <linux/firmware.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/firmware/qcom/qcom_scm.h>
17#include <linux/sizes.h>
18#include <linux/slab.h>
19#include <linux/soc/qcom/mdt_loader.h>
20
21static bool mdt_phdr_valid(const struct elf32_phdr *phdr)
22{
23 if (phdr->p_type != PT_LOAD)
24 return false;
25
26 if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
27 return false;
28
29 if (!phdr->p_memsz)
30 return false;
31
32 return true;
33}
34
35static ssize_t mdt_load_split_segment(void *ptr, const struct elf32_phdr *phdrs,
36 unsigned int segment, const char *fw_name,
37 struct device *dev)
38{
39 const struct elf32_phdr *phdr = &phdrs[segment];
40 const struct firmware *seg_fw;
41 ssize_t ret;
42
43 if (strlen(fw_name) < 4)
44 return -EINVAL;
45
46 char *seg_name __free(kfree) = kstrdup(fw_name, GFP_KERNEL);
47 if (!seg_name)
48 return -ENOMEM;
49
50 sprintf(seg_name + strlen(fw_name) - 3, "b%02d", segment);
51 ret = request_firmware_into_buf(&seg_fw, seg_name, dev,
52 ptr, phdr->p_filesz);
53 if (ret) {
54 dev_err(dev, "error %zd loading %s\n", ret, seg_name);
55 return ret;
56 }
57
58 if (seg_fw->size != phdr->p_filesz) {
59 dev_err(dev,
60 "failed to load segment %d from truncated file %s\n",
61 segment, seg_name);
62 ret = -EINVAL;
63 }
64
65 release_firmware(seg_fw);
66
67 return ret;
68}
69
70/**
71 * qcom_mdt_get_size() - acquire size of the memory region needed to load mdt
72 * @fw: firmware object for the mdt file
73 *
74 * Returns size of the loaded firmware blob, or -EINVAL on failure.
75 */
76ssize_t qcom_mdt_get_size(const struct firmware *fw)
77{
78 const struct elf32_phdr *phdrs;
79 const struct elf32_phdr *phdr;
80 const struct elf32_hdr *ehdr;
81 phys_addr_t min_addr = PHYS_ADDR_MAX;
82 phys_addr_t max_addr = 0;
83 int i;
84
85 ehdr = (struct elf32_hdr *)fw->data;
86 phdrs = (struct elf32_phdr *)(ehdr + 1);
87
88 for (i = 0; i < ehdr->e_phnum; i++) {
89 phdr = &phdrs[i];
90
91 if (!mdt_phdr_valid(phdr))
92 continue;
93
94 if (phdr->p_paddr < min_addr)
95 min_addr = phdr->p_paddr;
96
97 if (phdr->p_paddr + phdr->p_memsz > max_addr)
98 max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
99 }
100
101 return min_addr < max_addr ? max_addr - min_addr : -EINVAL;
102}
103EXPORT_SYMBOL_GPL(qcom_mdt_get_size);
104
105/**
106 * qcom_mdt_read_metadata() - read header and metadata from mdt or mbn
107 * @fw: firmware of mdt header or mbn
108 * @data_len: length of the read metadata blob
109 * @fw_name: name of the firmware, for construction of segment file names
110 * @dev: device handle to associate resources with
111 *
112 * The mechanism that performs the authentication of the loading firmware
113 * expects an ELF header directly followed by the segment of hashes, with no
114 * padding inbetween. This function allocates a chunk of memory for this pair
115 * and copy the two pieces into the buffer.
116 *
117 * In the case of split firmware the hash is found directly following the ELF
118 * header, rather than at p_offset described by the second program header.
119 *
120 * The caller is responsible to free (kfree()) the returned pointer.
121 *
122 * Return: pointer to data, or ERR_PTR()
123 */
124void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len,
125 const char *fw_name, struct device *dev)
126{
127 const struct elf32_phdr *phdrs;
128 const struct elf32_hdr *ehdr;
129 unsigned int hash_segment = 0;
130 size_t hash_offset;
131 size_t hash_size;
132 size_t ehdr_size;
133 unsigned int i;
134 ssize_t ret;
135 void *data;
136
137 ehdr = (struct elf32_hdr *)fw->data;
138 phdrs = (struct elf32_phdr *)(ehdr + 1);
139
140 if (ehdr->e_phnum < 2)
141 return ERR_PTR(-EINVAL);
142
143 if (phdrs[0].p_type == PT_LOAD)
144 return ERR_PTR(-EINVAL);
145
146 for (i = 1; i < ehdr->e_phnum; i++) {
147 if ((phdrs[i].p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH) {
148 hash_segment = i;
149 break;
150 }
151 }
152
153 if (!hash_segment) {
154 dev_err(dev, "no hash segment found in %s\n", fw_name);
155 return ERR_PTR(-EINVAL);
156 }
157
158 ehdr_size = phdrs[0].p_filesz;
159 hash_size = phdrs[hash_segment].p_filesz;
160
161 data = kmalloc(ehdr_size + hash_size, GFP_KERNEL);
162 if (!data)
163 return ERR_PTR(-ENOMEM);
164
165 /* Copy ELF header */
166 memcpy(data, fw->data, ehdr_size);
167
168 if (ehdr_size + hash_size == fw->size) {
169 /* Firmware is split and hash is packed following the ELF header */
170 hash_offset = phdrs[0].p_filesz;
171 memcpy(data + ehdr_size, fw->data + hash_offset, hash_size);
172 } else if (phdrs[hash_segment].p_offset + hash_size <= fw->size) {
173 /* Hash is in its own segment, but within the loaded file */
174 hash_offset = phdrs[hash_segment].p_offset;
175 memcpy(data + ehdr_size, fw->data + hash_offset, hash_size);
176 } else {
177 /* Hash is in its own segment, beyond the loaded file */
178 ret = mdt_load_split_segment(data + ehdr_size, phdrs, hash_segment, fw_name, dev);
179 if (ret) {
180 kfree(data);
181 return ERR_PTR(ret);
182 }
183 }
184
185 *data_len = ehdr_size + hash_size;
186
187 return data;
188}
189EXPORT_SYMBOL_GPL(qcom_mdt_read_metadata);
190
191/**
192 * qcom_mdt_pas_init() - initialize PAS region for firmware loading
193 * @dev: device handle to associate resources with
194 * @fw: firmware object for the mdt file
195 * @fw_name: name of the firmware, for construction of segment file names
196 * @pas_id: PAS identifier
197 * @mem_phys: physical address of allocated memory region
198 * @ctx: PAS metadata context, to be released by caller
199 *
200 * Returns 0 on success, negative errno otherwise.
201 */
202int qcom_mdt_pas_init(struct device *dev, const struct firmware *fw,
203 const char *fw_name, int pas_id, phys_addr_t mem_phys,
204 struct qcom_scm_pas_metadata *ctx)
205{
206 const struct elf32_phdr *phdrs;
207 const struct elf32_phdr *phdr;
208 const struct elf32_hdr *ehdr;
209 phys_addr_t min_addr = PHYS_ADDR_MAX;
210 phys_addr_t max_addr = 0;
211 bool relocate = false;
212 size_t metadata_len;
213 void *metadata;
214 int ret;
215 int i;
216
217 ehdr = (struct elf32_hdr *)fw->data;
218 phdrs = (struct elf32_phdr *)(ehdr + 1);
219
220 for (i = 0; i < ehdr->e_phnum; i++) {
221 phdr = &phdrs[i];
222
223 if (!mdt_phdr_valid(phdr))
224 continue;
225
226 if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
227 relocate = true;
228
229 if (phdr->p_paddr < min_addr)
230 min_addr = phdr->p_paddr;
231
232 if (phdr->p_paddr + phdr->p_memsz > max_addr)
233 max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
234 }
235
236 metadata = qcom_mdt_read_metadata(fw, &metadata_len, fw_name, dev);
237 if (IS_ERR(metadata)) {
238 ret = PTR_ERR(metadata);
239 dev_err(dev, "error %d reading firmware %s metadata\n", ret, fw_name);
240 goto out;
241 }
242
243 ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len, ctx);
244 kfree(metadata);
245 if (ret) {
246 /* Invalid firmware metadata */
247 dev_err(dev, "error %d initializing firmware %s\n", ret, fw_name);
248 goto out;
249 }
250
251 if (relocate) {
252 ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr);
253 if (ret) {
254 /* Unable to set up relocation */
255 dev_err(dev, "error %d setting up firmware %s\n", ret, fw_name);
256 goto out;
257 }
258 }
259
260out:
261 return ret;
262}
263EXPORT_SYMBOL_GPL(qcom_mdt_pas_init);
264
265static bool qcom_mdt_bins_are_split(const struct firmware *fw, const char *fw_name)
266{
267 const struct elf32_phdr *phdrs;
268 const struct elf32_hdr *ehdr;
269 uint64_t seg_start, seg_end;
270 int i;
271
272 ehdr = (struct elf32_hdr *)fw->data;
273 phdrs = (struct elf32_phdr *)(ehdr + 1);
274
275 for (i = 0; i < ehdr->e_phnum; i++) {
276 /*
277 * The size of the MDT file is not padded to include any
278 * zero-sized segments at the end. Ignore these, as they should
279 * not affect the decision about image being split or not.
280 */
281 if (!phdrs[i].p_filesz)
282 continue;
283
284 seg_start = phdrs[i].p_offset;
285 seg_end = phdrs[i].p_offset + phdrs[i].p_filesz;
286 if (seg_start > fw->size || seg_end > fw->size)
287 return true;
288 }
289
290 return false;
291}
292
293static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
294 const char *fw_name, int pas_id, void *mem_region,
295 phys_addr_t mem_phys, size_t mem_size,
296 phys_addr_t *reloc_base, bool pas_init)
297{
298 const struct elf32_phdr *phdrs;
299 const struct elf32_phdr *phdr;
300 const struct elf32_hdr *ehdr;
301 phys_addr_t mem_reloc;
302 phys_addr_t min_addr = PHYS_ADDR_MAX;
303 ssize_t offset;
304 bool relocate = false;
305 bool is_split;
306 void *ptr;
307 int ret = 0;
308 int i;
309
310 if (!fw || !mem_region || !mem_phys || !mem_size)
311 return -EINVAL;
312
313 is_split = qcom_mdt_bins_are_split(fw, fw_name);
314 ehdr = (struct elf32_hdr *)fw->data;
315 phdrs = (struct elf32_phdr *)(ehdr + 1);
316
317 for (i = 0; i < ehdr->e_phnum; i++) {
318 phdr = &phdrs[i];
319
320 if (!mdt_phdr_valid(phdr))
321 continue;
322
323 if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
324 relocate = true;
325
326 if (phdr->p_paddr < min_addr)
327 min_addr = phdr->p_paddr;
328 }
329
330 if (relocate) {
331 /*
332 * The image is relocatable, so offset each segment based on
333 * the lowest segment address.
334 */
335 mem_reloc = min_addr;
336 } else {
337 /*
338 * Image is not relocatable, so offset each segment based on
339 * the allocated physical chunk of memory.
340 */
341 mem_reloc = mem_phys;
342 }
343
344 for (i = 0; i < ehdr->e_phnum; i++) {
345 phdr = &phdrs[i];
346
347 if (!mdt_phdr_valid(phdr))
348 continue;
349
350 offset = phdr->p_paddr - mem_reloc;
351 if (offset < 0 || offset + phdr->p_memsz > mem_size) {
352 dev_err(dev, "segment outside memory range\n");
353 ret = -EINVAL;
354 break;
355 }
356
357 if (phdr->p_filesz > phdr->p_memsz) {
358 dev_err(dev,
359 "refusing to load segment %d with p_filesz > p_memsz\n",
360 i);
361 ret = -EINVAL;
362 break;
363 }
364
365 ptr = mem_region + offset;
366
367 if (phdr->p_filesz && !is_split) {
368 /* Firmware is large enough to be non-split */
369 if (phdr->p_offset + phdr->p_filesz > fw->size) {
370 dev_err(dev, "file %s segment %d would be truncated\n",
371 fw_name, i);
372 ret = -EINVAL;
373 break;
374 }
375
376 memcpy(ptr, fw->data + phdr->p_offset, phdr->p_filesz);
377 } else if (phdr->p_filesz) {
378 /* Firmware not large enough, load split-out segments */
379 ret = mdt_load_split_segment(ptr, phdrs, i, fw_name, dev);
380 if (ret)
381 break;
382 }
383
384 if (phdr->p_memsz > phdr->p_filesz)
385 memset(ptr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
386 }
387
388 if (reloc_base)
389 *reloc_base = mem_reloc;
390
391 return ret;
392}
393
394/**
395 * qcom_mdt_load() - load the firmware which header is loaded as fw
396 * @dev: device handle to associate resources with
397 * @fw: firmware object for the mdt file
398 * @firmware: name of the firmware, for construction of segment file names
399 * @pas_id: PAS identifier
400 * @mem_region: allocated memory region to load firmware into
401 * @mem_phys: physical address of allocated memory region
402 * @mem_size: size of the allocated memory region
403 * @reloc_base: adjusted physical address after relocation
404 *
405 * Returns 0 on success, negative errno otherwise.
406 */
407int qcom_mdt_load(struct device *dev, const struct firmware *fw,
408 const char *firmware, int pas_id, void *mem_region,
409 phys_addr_t mem_phys, size_t mem_size,
410 phys_addr_t *reloc_base)
411{
412 int ret;
413
414 ret = qcom_mdt_pas_init(dev, fw, firmware, pas_id, mem_phys, NULL);
415 if (ret)
416 return ret;
417
418 return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
419 mem_size, reloc_base, true);
420}
421EXPORT_SYMBOL_GPL(qcom_mdt_load);
422
423/**
424 * qcom_mdt_load_no_init() - load the firmware which header is loaded as fw
425 * @dev: device handle to associate resources with
426 * @fw: firmware object for the mdt file
427 * @firmware: name of the firmware, for construction of segment file names
428 * @pas_id: PAS identifier
429 * @mem_region: allocated memory region to load firmware into
430 * @mem_phys: physical address of allocated memory region
431 * @mem_size: size of the allocated memory region
432 * @reloc_base: adjusted physical address after relocation
433 *
434 * Returns 0 on success, negative errno otherwise.
435 */
436int qcom_mdt_load_no_init(struct device *dev, const struct firmware *fw,
437 const char *firmware, int pas_id,
438 void *mem_region, phys_addr_t mem_phys,
439 size_t mem_size, phys_addr_t *reloc_base)
440{
441 return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
442 mem_size, reloc_base, false);
443}
444EXPORT_SYMBOL_GPL(qcom_mdt_load_no_init);
445
446MODULE_DESCRIPTION("Firmware parser for Qualcomm MDT format");
447MODULE_LICENSE("GPL v2");