[PATCH v11 10/35] remoteproc: k3-m4: Use k3_rproc_mem_data structure for memory info

Beleswar Padhi
2025-04-25T10:42:26Z

The ti_k3_m4_remoteproc.c driver previously hardcoded device memory
region addresses and names. Change this to use the k3_rproc_mem_data
structure to store memory information. This aligns with DSP and R5
drivers, and can be refactored out later.

Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Tested-by: Judith Mendez <jm@ti.com>
---
v11: Changelog:
1. Carried T/B tag.

Link to v10:
https://lore.kernel.org/all/20250417182001.3903905-11-b-padhi@ti.com/

v10: Changelog:
None

Link to v9:
https://lore.kernel.org/all/20250317120622.1746415-6-b-padhi@ti.com/

drivers/remoteproc/ti_k3_m4_remoteproc.c | 60 ++++++++++++++++++------
1 file changed, 45 insertions(+), 15 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
index d0ee7a8d460d4..e83bef7cfddfd 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -20,9 +20,6 @@
#include "remoteproc_internal.h"
#include "ti_sci_proc.h"

-#define K3_M4_IRAM_DEV_ADDR 0x00000
-#define K3_M4_DRAM_DEV_ADDR 0x30000
-
/**
* struct k3_m4_rproc_mem - internal memory structure
* @cpu_addr: MPU virtual address of the memory region
@@ -38,15 +35,29 @@ struct k3_m4_rproc_mem {
};

/**
- * struct k3_m4_rproc_mem_data - memory definitions for a remote processor
+ * struct k3_m4_mem_data - memory definitions for a remote processor
* @name: name for this memory entry
* @dev_addr: device address for the memory entry
*/
-struct k3_m4_rproc_mem_data {
+struct k3_m4_mem_data {
const char *name;
const u32 dev_addr;
};

+/**
+ * struct k3_m4_dev_data - device data structure for a M4 core
+ * @mems: pointer to memory definitions for a M4 core
+ * @num_mems: number of memory regions in @mems
+ * @boot_align_addr: boot vector address alignment granularity
+ * @uses_lreset: flag to denote the need for local reset management
+ */
+struct k3_m4_dev_data {
+ const struct k3_m4_mem_data *mems;
+ u32 num_mems;
+ u32 boot_align_addr;
+ bool uses_lreset;
+};
+
/**
* struct k3_m4_rproc - k3 remote processor driver structure
* @dev: cached device pointer
@@ -56,6 +67,7 @@ struct k3_m4_rproc_mem_data {
* @rmem: reserved memory regions data
* @num_rmems: number of reserved memory regions
* @reset: reset control handle
+ * @data: pointer to M4-specific device data
* @tsp: TI-SCI processor control handle
* @ti_sci: TI-SCI handle
* @ti_sci_id: TI-SCI device identifier
@@ -71,6 +83,7 @@ struct k3_m4_rproc {
struct k3_m4_rproc_mem *rmem;
int num_rmems;
struct reset_control *reset;
+ const struct k3_m4_dev_data *data;
struct ti_sci_proc *tsp;
const struct ti_sci_handle *ti_sci;
u32 ti_sci_id;
@@ -336,14 +349,13 @@ static void *k3_m4_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool
static int k3_m4_rproc_of_get_memories(struct platform_device *pdev,
struct k3_m4_rproc *kproc)
{
- static const char * const mem_names[] = { "iram", "dram" };
- static const u32 mem_addrs[] = { K3_M4_IRAM_DEV_ADDR, K3_M4_DRAM_DEV_ADDR };
+ const struct k3_m4_dev_data *data = kproc->data;
struct device *dev = &pdev->dev;
struct resource *res;
int num_mems;
int i;

- num_mems = ARRAY_SIZE(mem_names);
+ num_mems = kproc->data->num_mems;
kproc->mem = devm_kcalloc(kproc->dev, num_mems,
sizeof(*kproc->mem), GFP_KERNEL);
if (!kproc->mem)
@@ -351,17 +363,17 @@ static int k3_m4_rproc_of_get_memories(struct platform_device *pdev,

for (i = 0; i < num_mems; i++) {
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- mem_names[i]);
+ data->mems[i].name);
if (!res) {
dev_err(dev, "found no memory resource for %s\n",
- mem_names[i]);
+ data->mems[i].name);
return -EINVAL;
}
if (!devm_request_mem_region(dev, res->start,
resource_size(res),
dev_name(dev))) {
dev_err(dev, "could not request %s region for resource\n",
- mem_names[i]);
+ data->mems[i].name);
return -EBUSY;
}

@@ -369,15 +381,15 @@ static int k3_m4_rproc_of_get_memories(struct platform_device *pdev,
resource_size(res));
if (!kproc->mem[i].cpu_addr) {
dev_err(dev, "failed to map %s memory\n",
- mem_names[i]);
+ data->mems[i].name);
return -ENOMEM;
}
kproc->mem[i].bus_addr = res->start;
- kproc->mem[i].dev_addr = mem_addrs[i];
+ kproc->mem[i].dev_addr = data->mems[i].dev_addr;
kproc->mem[i].size = resource_size(res);

dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
- mem_names[i], &kproc->mem[i].bus_addr,
+ data->mems[i].name, &kproc->mem[i].bus_addr,
kproc->mem[i].size, kproc->mem[i].cpu_addr,
kproc->mem[i].dev_addr);
}
@@ -563,12 +575,17 @@ static int k3_m4_rproc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct k3_m4_rproc *kproc;
+ const struct k3_m4_dev_data *data;
struct rproc *rproc;
const char *fw_name;
bool r_state = false;
bool p_state = false;
int ret;

+ data = of_device_get_match_data(dev);
+ if (!data)
+ return -ENODEV;
+
ret = rproc_of_parse_firmware(dev, 0, &fw_name);
if (ret)
return dev_err_probe(dev, ret, "failed to parse firmware-name property\n");
@@ -583,6 +600,7 @@ static int k3_m4_rproc_probe(struct platform_device *pdev)
kproc = rproc->priv;
kproc->dev = dev;
kproc->rproc = rproc;
+ kproc->data = data;
platform_set_drvdata(pdev, rproc);

kproc->ti_sci = devm_ti_sci_get_by_phandle(dev, "ti,sci");
@@ -650,8 +668,20 @@ static int k3_m4_rproc_probe(struct platform_device *pdev)
return 0;
}

+static const struct k3_m4_mem_data am64_m4_mems[] = {
+ { .name = "iram", .dev_addr = 0x0 },
+ { .name = "dram", .dev_addr = 0x30000 },
+};
+
+static const struct k3_m4_dev_data am64_m4_data = {
+ .mems = am64_m4_mems,
+ .num_mems = ARRAY_SIZE(am64_m4_mems),
+ .boot_align_addr = SZ_1K,
+ .uses_lreset = true,
+};
+
static const struct of_device_id k3_m4_of_match[] = {
- { .compatible = "ti,am64-m4fss", },
+ { .compatible = "ti,am64-m4fss", .data = &am64_m4_data, },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, k3_m4_of_match);
--
2.34.1