@@ -188,6 +188,74 @@ void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len,
}
EXPORT_SYMBOL_GPL(qcom_mdt_read_metadata);
+/**
+ * qcom_mdt_pas_init() - initialize PAS region for firmware loading
+ * @dev: device handle to associate resources with
+ * @fw: firmware object for the mdt file
+ * @firmware: name of the firmware, for construction of segment file names
+ * @pas_id: PAS identifier
+ * @mem_phys: physical address of allocated memory region
+ * @ctx: PAS metadata context, to be released by caller
+ *
+ * Returns 0 on success, negative errno otherwise.
+ */
+int qcom_mdt_pas_init(struct device *dev, const struct firmware *fw,
+ const char *fw_name, int pas_id, phys_addr_t mem_phys,
+ struct qcom_scm_pas_metadata *ctx)
+{
+ const struct elf32_phdr *phdrs;
+ const struct elf32_phdr *phdr;
+ const struct elf32_hdr *ehdr;
+ phys_addr_t min_addr = PHYS_ADDR_MAX;
+ phys_addr_t max_addr = 0;
+ size_t metadata_len;
+ void *metadata;
+ int ret;
+ int i;
+
+ ehdr = (struct elf32_hdr *)fw->data;
+ phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ phdr = &phdrs[i];
+
+ if (!mdt_phdr_valid(phdr))
+ continue;
+
+ if (phdr->p_paddr < min_addr)
+ min_addr = phdr->p_paddr;
+
+ if (phdr->p_paddr + phdr->p_memsz > max_addr)
+ max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
+ }
+
+ metadata = qcom_mdt_read_metadata(fw, &metadata_len, fw_name, dev);
+ if (IS_ERR(metadata)) {
+ ret = PTR_ERR(metadata);
+ dev_err(dev, "error %d reading firmware %s metadata\n", ret, fw_name);
+ goto out;
+ }
+
+ ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len, ctx);
+ kfree(metadata);
+ if (ret) {
+ /* Invalid firmware metadata */
+ dev_err(dev, "error %d initializing firmware %s\n", ret, fw_name);
+ goto out;
+ }
+
+ ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr);
+ if (ret) {
+ /* Unable to set up relocation */
+ dev_err(dev, "error %d setting up firmware %s\n", ret, fw_name);
+ goto out;
+ }
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_pas_init);
+
static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
const char *fw_name, int pas_id, void *mem_region,
phys_addr_t mem_phys, size_t mem_size,
@@ -198,10 +266,7 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
const struct elf32_hdr *ehdr;
phys_addr_t mem_reloc;
phys_addr_t min_addr = PHYS_ADDR_MAX;
- phys_addr_t max_addr = 0;
- size_t metadata_len;
ssize_t offset;
- void *metadata;
bool relocate = false;
void *ptr;
int ret = 0;
@@ -224,37 +289,6 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
if (phdr->p_paddr < min_addr)
min_addr = phdr->p_paddr;
-
- if (phdr->p_paddr + phdr->p_memsz > max_addr)
- max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
- }
-
- if (pas_init) {
- metadata = qcom_mdt_read_metadata(fw, &metadata_len, fw_name, dev);
- if (IS_ERR(metadata)) {
- ret = PTR_ERR(metadata);
- dev_err(dev, "error %d reading firmware %s metadata\n",
- ret, fw_name);
- goto out;
- }
-
- ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len, NULL);
-
- kfree(metadata);
- if (ret) {
- /* Invalid firmware metadata */
- dev_err(dev, "error %d initializing firmware %s\n",
- ret, fw_name);
- goto out;
- }
-
- ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr);
- if (ret) {
- /* Unable to set up relocation */
- dev_err(dev, "error %d setting up firmware %s\n",
- ret, fw_name);
- goto out;
- }
}
if (relocate) {
@@ -319,8 +353,6 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
if (reloc_base)
*reloc_base = mem_reloc;
-out:
-
return ret;
}
@@ -342,6 +374,12 @@ int qcom_mdt_load(struct device *dev, const struct firmware *fw,
phys_addr_t mem_phys, size_t mem_size,
phys_addr_t *reloc_base)
{
+ int ret;
+
+ ret = qcom_mdt_pas_init(dev, fw, firmware, pas_id, mem_phys, NULL);
+ if (ret)
+ return ret;
+
return __qcom_mdt_load(dev, fw, firmware, pas_id, mem_region, mem_phys,
mem_size, reloc_base, true);
}
@@ -10,10 +10,14 @@
struct device;
struct firmware;
+struct qcom_scm_pas_metadata;
#if IS_ENABLED(CONFIG_QCOM_MDT_LOADER)
ssize_t qcom_mdt_get_size(const struct firmware *fw);
+int qcom_mdt_pas_init(struct device *dev, const struct firmware *fw,
+ const char *fw_name, int pas_id, phys_addr_t mem_phys,
+ struct qcom_scm_pas_metadata *pas_metadata_ctx);
int qcom_mdt_load(struct device *dev, const struct firmware *fw,
const char *fw_name, int pas_id, void *mem_region,
phys_addr_t mem_phys, size_t mem_size,
@@ -33,6 +37,13 @@ static inline ssize_t qcom_mdt_get_size(const struct firmware *fw)
return -ENODEV;
}
+static int qcom_mdt_pas_init(struct device *dev, const struct firmware *fw,
+ const char *fw_name, int pas_id, phys_addr_t mem_phys,
+ struct qcom_scm_pas_metadata *pas_metadata_ctx)
+{
+ return -ENODEV;
+}
+
static inline int qcom_mdt_load(struct device *dev, const struct firmware *fw,
const char *fw_name, int pas_id,
void *mem_region, phys_addr_t mem_phys,
Rather than passing a boolean to indicate if the PAS operations should be performed from within __mdt_load(), extract them to their own helper function. This will allow clients to invoke this directly, with some qcom_scm_pas_metadata context that they later needs to release, without further having to complicate the prototype of qcom_mdt_load(). Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- drivers/soc/qcom/mdt_loader.c | 110 +++++++++++++++++++--------- include/linux/soc/qcom/mdt_loader.h | 11 +++ 2 files changed, 85 insertions(+), 36 deletions(-)