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remoteproc: cleanup resource table parsing paths 

rproc_handle_resources() looks for the resource table and then
invokes a resource handler function which it took as a parameter.

This works, but it's a bit unintuitive to follow.

Instead of passing around function pointers, this patch changes
rproc_handle_resource() to just find and return the resource table,
and then the calling sites of rproc_handle_resource() invoke their
resource handlers directly.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Ohad Ben-Cohen 2012-02-13 21:47:49 +01:00
parent 63140e0ed2
commit 1e3e2c7c46
1 changed files with 38 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
drivers/remoteproc/remoteproc_core.c
View File

@ -822,32 +822,31 @@ rproc_handle_virtio_rsc(struct rproc *rproc, struct resource_table *table, int l
}
/**
* rproc_handle_resources() - find and handle the resource table
* rproc_find_rsc_table() - find the resource table
* @rproc: the rproc handle
* @elf_data: the content of the ELF firmware image
* @len: firmware size (in bytes)
* @handler: function that should be used to handle the resource table
* @tablesz: place holder for providing back the table size
*
* This function finds the resource table inside the remote processor's
* firmware, and invoke a user-supplied handler with it (we have two
* possible handlers: one is invoked upon registration of @rproc,
* in order to register the supported virito devices, and the other is
* invoked when @rproc is actually booted).
* 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.
*
* Currently this function fails if a resource table doesn't exist.
* This restriction will be removed when we'll start supporting remote
* processors that don't need a resource table.
* 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).
*/
static int rproc_handle_resources(struct rproc *rproc, const u8 *elf_data,
size_t len, rproc_handle_resources_t handler)
static struct resource_table *
rproc_find_rsc_table(struct rproc *rproc, const u8 *elf_data, size_t len,
int *tablesz)
{
struct elf32_hdr *ehdr;
struct elf32_shdr *shdr;
const char *name_table;
struct device *dev = rproc->dev;
int i, ret = -EINVAL;
struct resource_table *table;
struct resource_table *table = NULL;
int i;
ehdr = (struct elf32_hdr *)elf_data;
shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff);
@ -866,39 +865,39 @@ static int rproc_handle_resources(struct rproc *rproc, const u8 *elf_data,
/* make sure we have the entire table */
if (offset + size > len) {
dev_err(dev, "resource table truncated\n");
return -EINVAL;
return NULL;
}
/* make sure table has at least the header */
if (sizeof(struct resource_table) > size) {
dev_err(dev, "header-less resource table\n");
return -EINVAL;
return NULL;
}
/* we don't support any version beyond the first */
if (table->ver != 1) {
dev_err(dev, "unsupported fw ver: %d\n", table->ver);
return -EINVAL;
return NULL;
}
/* make sure reserved bytes are zeroes */
if (table->reserved[0] || table->reserved[1]) {
dev_err(dev, "non zero reserved bytes\n");
return -EINVAL;
return NULL;
}
/* make sure the offsets array isn't truncated */
if (table->num * sizeof(table->offset[0]) +
sizeof(struct resource_table) > size) {
dev_err(dev, "resource table incomplete\n");
return -EINVAL;
return NULL;
}
ret = handler(rproc, table, shdr->sh_size);
*tablesz = shdr->sh_size;
break;
}
return ret;
return table;
}
/**
@ -1012,7 +1011,8 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
struct device *dev = rproc->dev;
const char *name = rproc->firmware;
struct elf32_hdr *ehdr;
int ret;
struct resource_table *table;
int ret, tablesz;
ret = rproc_fw_sanity_check(rproc, fw);
if (ret)
@ -1039,9 +1039,13 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
*/
rproc->bootaddr = ehdr->e_entry;
/* look for the resource table */
table = rproc_find_rsc_table(rproc, fw->data, fw->size, &tablesz);
if (!table)
goto clean_up;
/* handle fw resources which are required to boot rproc */
ret = rproc_handle_resources(rproc, fw->data, fw->size,
rproc_handle_boot_rsc);
ret = rproc_handle_boot_rsc(rproc, table, tablesz);
if (ret) {
dev_err(dev, "Failed to process resources: %d\n", ret);
goto clean_up;
@ -1084,19 +1088,21 @@ clean_up:
static void rproc_fw_config_virtio(const struct firmware *fw, void *context)
{
struct rproc *rproc = context;
struct device *dev = rproc->dev;
int ret;
struct resource_table *table;
int ret, tablesz;
if (rproc_fw_sanity_check(rproc, fw) < 0)
goto out;
/* does the fw support any virtio devices ? */
ret = rproc_handle_resources(rproc, fw->data, fw->size,
rproc_handle_virtio_rsc);
if (ret) {
dev_info(dev, "No fw virtio device was found\n");
/* look for the resource table */
table = rproc_find_rsc_table(rproc, fw->data, fw->size, &tablesz);
if (!table)
goto out;
/* look for virtio devices and register them */
ret = rproc_handle_virtio_rsc(rproc, table, tablesz);
if (ret)
goto out;
}
out:
if (fw)