remoteproc: parse STE-firmware and find resource table address

Parse the STE firmware and scan the TOC-table to find the address
of the loaded resource table.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
[rebase patch; update terminology]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>

1 files changed, 29 insertions, 14 deletions

diff --git a/drivers/remoteproc/ste_modem_rproc.c b/drivers/remoteproc/ste_modem_rproc.c
index a7743c069339..8cc588f38cd2 100644
--- a/drivers/remoteproc/ste_modem_rproc.c
+++ b/drivers/remoteproc/ste_modem_rproc.c
@@ -64,26 +64,18 @@ static int sproc_load_segments(struct rproc *rproc, const struct firmware *fw)
 }
 
 /* Find the entry for resource table in the Table of Content */
-static struct ste_toc_entry *sproc_find_rsc_entry(const struct firmware *fw)
+static const struct ste_toc_entry *sproc_find_rsc_entry(const void *data)
 {
         int i;
-        struct ste_toc *toc;
-
-        if (!fw)
-                return NULL;
-
-        toc = (void *)fw->data;
+        const struct ste_toc *toc;
+        toc = data;
 
         /* Search the table for the resource table */
         for (i = 0; i < SPROC_MAX_TOC_ENTRIES &&
                     toc->table[i].start != 0xffffffff; i++) {
-
                 if (!strncmp(toc->table[i].name, SPROC_RESOURCE_NAME,
-                             sizeof(toc->table[i].name))) {
-                        if (toc->table[i].start > fw->size)
-                                return NULL;
+                             sizeof(toc->table[i].name)))
                         return &toc->table[i];
-                }
         }
 
         return NULL;
@@ -96,9 +88,12 @@ sproc_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
 {
         struct sproc *sproc = rproc->priv;
         struct resource_table *table;
-        struct ste_toc_entry *entry;
+        const struct ste_toc_entry *entry;
 
-        entry = sproc_find_rsc_entry(fw);
+        if (!fw)
+                return NULL;
+
+        entry = sproc_find_rsc_entry(fw->data);
         if (!entry) {
                 sproc_err(sproc, "resource table not found in fw\n");
                 return NULL;
@@ -149,10 +144,30 @@ sproc_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
         return table;
 }
 
+/* Find the resource table inside the remote processor's firmware. */
+static struct resource_table *
+sproc_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
+{
+        struct sproc *sproc = rproc->priv;
+        const struct ste_toc_entry *entry;
+
+        if (!fw || !sproc->fw_addr)
+                return NULL;
+
+        entry = sproc_find_rsc_entry(sproc->fw_addr);
+        if (!entry) {
+                sproc_err(sproc, "resource table not found in fw\n");
+                return NULL;
+        }
+
+        return sproc->fw_addr + entry->start;
+}
+
 /* STE modem firmware handler operations */
 const struct rproc_fw_ops sproc_fw_ops = {
         .load = sproc_load_segments,
         .find_rsc_table = sproc_find_rsc_table,
+        .find_loaded_rsc_table = sproc_find_loaded_rsc_table,
 };
 
 /* Kick the modem with specified notification id */