Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

[linux-2.6-microblaze.git] / drivers / remoteproc / remoteproc_elf_loader.c

diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
index c523983..b17d72e 100644 (file)
--- a/drivers/remoteproc/remoteproc_elf_loader.c
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -39,8 +39,7 @@
  *
  * Make sure this fw image is sane.
  */
-static int
-rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
+int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
 {
        const char *name = rproc->firmware;
        struct device *dev = &rproc->dev;
@@ -98,6 +97,7 @@ rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
 
        return 0;
 }
+EXPORT_SYMBOL(rproc_elf_sanity_check);
 
 /**
  * rproc_elf_get_boot_addr() - Get rproc's boot address.
@@ -110,13 +110,13 @@ rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
  * Note that the boot address is not a configurable property of all remote
  * processors. Some will always boot at a specific hard-coded address.
  */
-static
 u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
 {
        struct elf32_hdr *ehdr  = (struct elf32_hdr *)fw->data;
 
        return ehdr->e_entry;
 }
+EXPORT_SYMBOL(rproc_elf_get_boot_addr);
 
 /**
  * rproc_elf_load_segments() - load firmware segments to memory
@@ -142,8 +142,7 @@ u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
  * directly allocate memory for every segment/resource. This is not yet
  * supported, though.
  */
-static int
-rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
+int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 {
        struct device *dev = &rproc->dev;
        struct elf32_hdr *ehdr;
@@ -207,6 +206,7 @@ rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 
        return ret;
 }
+EXPORT_SYMBOL(rproc_elf_load_segments);
 
 static struct elf32_shdr *
 find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size)
@@ -268,41 +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.
  */
-static 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_load_rsc_table);
 
 /**
  * rproc_elf_find_loaded_rsc_table() - find the loaded resource table
@@ -315,8 +323,8 @@ rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
  * Returns the pointer to the resource table if it is found or NULL otherwise.
  * If the table wasn't loaded yet the result is unspecified.
  */
-static struct resource_table *
-rproc_elf_find_loaded_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)
 {
        struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data;
        struct elf32_shdr *shdr;
@@ -327,11 +335,4 @@ rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
 
        return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size);
 }
-
-const struct rproc_fw_ops rproc_elf_fw_ops = {
-       .load = rproc_elf_load_segments,
-       .find_rsc_table = rproc_elf_find_rsc_table,
-       .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
-       .sanity_check = rproc_elf_sanity_check,
-       .get_boot_addr = rproc_elf_get_boot_addr
-};
+EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table);