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authorBjorn Andersson <bjorn.andersson@linaro.org>2018-01-05 15:58:03 -0800
committerBjorn Andersson <bjorn.andersson@linaro.org>2018-01-15 09:29:53 -0800
commit58b640906702bcc083ac783bf10325e22c67d9fc (patch)
treea9464c01c1f24b6977f7fefa67066a2e10eb4fea /drivers/remoteproc
parentd4bb86f2c39cdd31338dd0274540596aa9ae82c3 (diff)
downloadlinux-58b640906702bcc083ac783bf10325e22c67d9fc.tar.bz2
remoteproc: Move resource table load logic to find
Extend the previous operation of finding the resource table in the ELF with the extra step of populating the rproc struct with a copy and the size. This allows drivers to override the mechanism used for acquiring the resource table, or omit it for firmware that is known not to have a resource table. This leaves the custom, dummy, find_rsc_table implementations found in some drivers dangling. Reviewed-By: Loic Pallardy <loic.pallardy@st.com> Tested-By: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/remoteproc_core.c32
-rw-r--r--drivers/remoteproc/remoteproc_elf_loader.c37
-rw-r--r--drivers/remoteproc/remoteproc_internal.h16
3 files changed, 35 insertions, 50 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 3160cfe897da..84e07d5b7c2c 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -907,8 +907,7 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
{
struct device *dev = &rproc->dev;
const char *name = rproc->firmware;
- struct resource_table *table;
- int ret, tablesz;
+ int ret;
ret = rproc_fw_sanity_check(rproc, fw);
if (ret)
@@ -927,27 +926,11 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
}
rproc->bootaddr = rproc_get_boot_addr(rproc, fw);
- ret = -EINVAL;
-
- /* look for the resource table */
- table = rproc_find_rsc_table(rproc, fw, &tablesz);
- if (!table) {
- dev_err(dev, "Failed to find resource table\n");
- goto clean_up;
- }
-
- /*
- * Create a copy of the resource table. When a virtio device starts
- * and calls vring_new_virtqueue() the address of the allocated vring
- * will be stored in the cached_table. Before the device is started,
- * cached_table will be copied into device memory.
- */
- rproc->cached_table = kmemdup(table, tablesz, GFP_KERNEL);
- if (!rproc->cached_table)
- goto clean_up;
- rproc->table_ptr = rproc->cached_table;
- rproc->table_sz = tablesz;
+ /* load resource table */
+ ret = rproc_load_rsc_table(rproc, fw);
+ if (ret)
+ goto disable_iommu;
/* reset max_notifyid */
rproc->max_notifyid = -1;
@@ -967,11 +950,10 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
clean_up_resources:
rproc_resource_cleanup(rproc);
-clean_up:
kfree(rproc->cached_table);
rproc->cached_table = NULL;
rproc->table_ptr = NULL;
-
+disable_iommu:
rproc_disable_iommu(rproc);
return ret;
}
@@ -1443,7 +1425,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
/* Default to ELF loader if no load function is specified */
if (!rproc->ops->load) {
rproc->ops->load = rproc_elf_load_segments;
- rproc->ops->find_rsc_table = rproc_elf_find_rsc_table;
+ rproc->ops->load_rsc_table = rproc_elf_load_rsc_table;
rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table;
rproc->ops->sanity_check = rproc_elf_sanity_check;
rproc->ops->get_boot_addr = rproc_elf_get_boot_addr;
diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
index 822fa1bf893f..b17d72ec8603 100644
--- a/drivers/remoteproc/remoteproc_elf_loader.c
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -268,42 +268,49 @@ find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size)
}
/**
- * rproc_elf_find_rsc_table() - find the resource table
+ * rproc_elf_load_rsc_table() - load the resource table
* @rproc: the rproc handle
* @fw: the ELF firmware image
- * @tablesz: place holder for providing back the table size
*
* This function finds the resource table inside the remote processor's
- * firmware. It is used both upon the registration of @rproc (in order
- * to look for and register the supported virito devices), and when the
- * @rproc is booted.
+ * firmware, load it into the @cached_table and update @table_ptr.
*
- * Returns the pointer to the resource table if it is found, and write its
- * size into @tablesz. If a valid table isn't found, NULL is returned
- * (and @tablesz isn't set).
+ * Return: 0 on success, negative errno on failure.
*/
-struct resource_table *rproc_elf_find_rsc_table(struct rproc *rproc,
- const struct firmware *fw,
- int *tablesz)
+int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw)
{
struct elf32_hdr *ehdr;
struct elf32_shdr *shdr;
struct device *dev = &rproc->dev;
struct resource_table *table = NULL;
const u8 *elf_data = fw->data;
+ size_t tablesz;
ehdr = (struct elf32_hdr *)elf_data;
shdr = find_table(dev, ehdr, fw->size);
if (!shdr)
- return NULL;
+ return -EINVAL;
table = (struct resource_table *)(elf_data + shdr->sh_offset);
- *tablesz = shdr->sh_size;
+ tablesz = shdr->sh_size;
+
+ /*
+ * Create a copy of the resource table. When a virtio device starts
+ * and calls vring_new_virtqueue() the address of the allocated vring
+ * will be stored in the cached_table. Before the device is started,
+ * cached_table will be copied into device memory.
+ */
+ rproc->cached_table = kmemdup(table, tablesz, GFP_KERNEL);
+ if (!rproc->cached_table)
+ return -ENOMEM;
- return table;
+ rproc->table_ptr = rproc->cached_table;
+ rproc->table_sz = tablesz;
+
+ return 0;
}
-EXPORT_SYMBOL(rproc_elf_find_rsc_table);
+EXPORT_SYMBOL(rproc_elf_load_rsc_table);
/**
* rproc_elf_find_loaded_rsc_table() - find the loaded resource table
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index a42690c514e2..55a2950c5cb7 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -57,9 +57,7 @@ int rproc_trigger_recovery(struct rproc *rproc);
int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw);
u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw);
int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw);
-struct resource_table *rproc_elf_find_rsc_table(struct rproc *rproc,
- const struct firmware *fw,
- int *tablesz);
+int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw);
struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,
const struct firmware *fw);
@@ -90,15 +88,13 @@ int rproc_load_segments(struct rproc *rproc, const struct firmware *fw)
return -EINVAL;
}
-static inline
-struct resource_table *rproc_find_rsc_table(struct rproc *rproc,
- const struct firmware *fw,
- int *tablesz)
+static inline int rproc_load_rsc_table(struct rproc *rproc,
+ const struct firmware *fw)
{
- if (rproc->ops->find_rsc_table)
- return rproc->ops->find_rsc_table(rproc, fw, tablesz);
+ if (rproc->ops->load_rsc_table)
+ return rproc->ops->load_rsc_table(rproc, fw);
- return NULL;
+ return 0;
}
static inline