remoteproc: k3: Refactor .get_loaded_rsc_table ops into common driver

The .get_loaded_rsc_table rproc ops implementations in TI K3 R5, DSP and
M4 remoteproc drivers return a pointer to the resource table that was
pre-loaded at the base address of the DDR region reserved for firmware
usage.

Refactor the implementations into ti_k3_common.c driver as
k3_get_loaded_rsc_table() and register this common function as
.get_loaded_rsc_table ops in R5, DSP and M4 drivers.

Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Tested-by: Judith Mendez <jm@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20250513054510.3439842-32-b-padhi@ti.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Author: 3V3RYONE

drivers/remoteproc/ti_k3_common.c

@@ -318,5 +318,38 @@ EXPORT_SYMBOL_GPL(k3_rproc_attach);
 int k3_rproc_detach(struct rproc *rproc) { return 0; }
 EXPORT_SYMBOL_GPL(k3_rproc_detach);
 
+/*
+ * This function implements the .get_loaded_rsc_table() callback and is used
+ * to provide the resource table for a booted remote processor in IPC-only
+ * mode. The remote processor firmwares follow a design-by-contract approach
+ * and are expected to have the resource table at the base of the DDR region
+ * reserved for firmware usage. This provides flexibility for the remote
+ * processor to be booted by different bootloaders that may or may not have the
+ * ability to publish the resource table address and size through a DT
+ * property.
+ */
+struct resource_table *k3_get_loaded_rsc_table(struct rproc *rproc,
+					       size_t *rsc_table_sz)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = kproc->dev;
+
+	if (!kproc->rmem[0].cpu_addr) {
+		dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	/*
+	 * NOTE: The resource table size is currently hard-coded to a maximum
+	 * of 256 bytes. The most common resource table usage for K3 firmwares
+	 * is to only have the vdev resource entry and an optional trace entry.
+	 * The exact size could be computed based on resource table address, but
+	 * the hard-coded value suffices to support the IPC-only mode.
+	 */
+	*rsc_table_sz = 256;
+	return (__force struct resource_table *)kproc->rmem[0].cpu_addr;
+}
+EXPORT_SYMBOL_GPL(k3_get_loaded_rsc_table);
+
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("TI K3 common Remoteproc code");

drivers/remoteproc/ti_k3_common.h

@@ -104,4 +104,6 @@ int k3_rproc_start(struct rproc *rproc);
 int k3_rproc_stop(struct rproc *rproc);
 int k3_rproc_attach(struct rproc *rproc);
 int k3_rproc_detach(struct rproc *rproc);
+struct resource_table *k3_get_loaded_rsc_table(struct rproc *rproc,
+					       size_t *rsc_table_sz);
 #endif /* REMOTEPROC_TI_K3_COMMON_H */

drivers/remoteproc/ti_k3_dsp_remoteproc.c

@@ -58,38 +58,6 @@ static int k3_dsp_rproc_start(struct rproc *rproc)
 	return 0;
 }
 
-/*
- * This function implements the .get_loaded_rsc_table() callback and is used
- * to provide the resource table for a booted DSP in IPC-only mode. The K3 DSP
- * firmwares follow a design-by-contract approach and are expected to have the
- * resource table at the base of the DDR region reserved for firmware usage.
- * This provides flexibility for the remote processor to be booted by different
- * bootloaders that may or may not have the ability to publish the resource table
- * address and size through a DT property. This callback is invoked only in
- * IPC-only mode.
- */
-static struct resource_table *k3_dsp_get_loaded_rsc_table(struct rproc *rproc,
-							  size_t *rsc_table_sz)
-{
-	struct k3_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-
-	if (!kproc->rmem[0].cpu_addr) {
-		dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
-		return ERR_PTR(-ENOMEM);
-	}
-
-	/*
-	 * NOTE: The resource table size is currently hard-coded to a maximum
-	 * of 256 bytes. The most common resource table usage for K3 firmwares
-	 * is to only have the vdev resource entry and an optional trace entry.
-	 * The exact size could be computed based on resource table address, but
-	 * the hard-coded value suffices to support the IPC-only mode.
-	 */
-	*rsc_table_sz = 256;
-	return (__force struct resource_table *)kproc->rmem[0].cpu_addr;
-}
-
 /*
  * Custom function to translate a DSP device address (internal RAMs only) to a
  * kernel virtual address.  The DSPs can access their RAMs at either an internal
@@ -156,7 +124,7 @@ static const struct rproc_ops k3_dsp_rproc_ops = {
 	.detach			= k3_rproc_detach,
 	.kick			= k3_rproc_kick,
 	.da_to_va		= k3_dsp_rproc_da_to_va,
-	.get_loaded_rsc_table	= k3_dsp_get_loaded_rsc_table,
+	.get_loaded_rsc_table	= k3_get_loaded_rsc_table,
 };
 
 static int k3_dsp_rproc_of_get_memories(struct platform_device *pdev,

drivers/remoteproc/ti_k3_m4_remoteproc.c

@@ -21,38 +21,6 @@
 #include "ti_sci_proc.h"
 #include "ti_k3_common.h"
 
-/*
- * This function implements the .get_loaded_rsc_table() callback and is used
- * to provide the resource table for a booted remote processor in IPC-only
- * mode. The remote processor firmwares follow a design-by-contract approach
- * and are expected to have the resource table at the base of the DDR region
- * reserved for firmware usage. This provides flexibility for the remote
- * processor to be booted by different bootloaders that may or may not have the
- * ability to publish the resource table address and size through a DT
- * property.
- */
-static struct resource_table *k3_m4_get_loaded_rsc_table(struct rproc *rproc,
-							 size_t *rsc_table_sz)
-{
-	struct k3_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-
-	if (!kproc->rmem[0].cpu_addr) {
-		dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
-		return ERR_PTR(-ENOMEM);
-	}
-
-	/*
-	 * NOTE: The resource table size is currently hard-coded to a maximum
-	 * of 256 bytes. The most common resource table usage for K3 firmwares
-	 * is to only have the vdev resource entry and an optional trace entry.
-	 * The exact size could be computed based on resource table address, but
-	 * the hard-coded value suffices to support the IPC-only mode.
-	 */
-	*rsc_table_sz = 256;
-	return (__force struct resource_table *)kproc->rmem[0].cpu_addr;
-}
-
 /*
  * Custom function to translate a remote processor device address (internal
  * RAMs only) to a kernel virtual address.  The remote processors can access
@@ -253,7 +221,7 @@ static const struct rproc_ops k3_m4_rproc_ops = {
 	.detach = k3_rproc_detach,
 	.kick = k3_rproc_kick,
 	.da_to_va = k3_m4_rproc_da_to_va,
-	.get_loaded_rsc_table = k3_m4_get_loaded_rsc_table,
+	.get_loaded_rsc_table = k3_get_loaded_rsc_table,
 };
 
 static int k3_m4_rproc_probe(struct platform_device *pdev)

drivers/remoteproc/ti_k3_r5_remoteproc.c

@@ -559,38 +559,6 @@ static int k3_r5_rproc_stop(struct rproc *rproc)
 	return ret;
 }
 
-/*
- * This function implements the .get_loaded_rsc_table() callback and is used
- * to provide the resource table for the booted R5F in IPC-only mode. The K3 R5F
- * firmwares follow a design-by-contract approach and are expected to have the
- * resource table at the base of the DDR region reserved for firmware usage.
- * This provides flexibility for the remote processor to be booted by different
- * bootloaders that may or may not have the ability to publish the resource table
- * address and size through a DT property. This callback is invoked only in
- * IPC-only mode.
- */
-static struct resource_table *k3_r5_get_loaded_rsc_table(struct rproc *rproc,
-							 size_t *rsc_table_sz)
-{
-	struct k3_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-
-	if (!kproc->rmem[0].cpu_addr) {
-		dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
-		return ERR_PTR(-ENOMEM);
-	}
-
-	/*
-	 * NOTE: The resource table size is currently hard-coded to a maximum
-	 * of 256 bytes. The most common resource table usage for K3 firmwares
-	 * is to only have the vdev resource entry and an optional trace entry.
-	 * The exact size could be computed based on resource table address, but
-	 * the hard-coded value suffices to support the IPC-only mode.
-	 */
-	*rsc_table_sz = 256;
-	return (__force struct resource_table *)kproc->rmem[0].cpu_addr;
-}
-
 /*
  * Internal Memory translation helper
  *
@@ -1042,7 +1010,7 @@ static int k3_r5_rproc_configure_mode(struct k3_rproc *kproc)
 		kproc->rproc->ops->attach = k3_rproc_attach;
 		kproc->rproc->ops->detach = k3_rproc_detach;
 		kproc->rproc->ops->get_loaded_rsc_table =
-						k3_r5_get_loaded_rsc_table;
+						k3_get_loaded_rsc_table;
 	} else if (!c_state) {
 		dev_info(cdev, "configured R5F for remoteproc mode\n");
 		ret = 0;