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>

diff --git a/drivers/remoteproc/ste_modem_rproc.c b/drivers/remoteproc/ste_modem_rproc.c
index a7743c0..8cc588f 100644 (file)
--- 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 */