ST remote processor needs some specified memory regions for
firmware and IPC.
Memory regions are defined as reserved memory and should
be registered in remoteproc core thanks to rproc_add_carveout
function before rproc_start. For this, st rproc driver implements
prepare ops.
Signed-off-by: Loic Pallardy <loic.pallardy@xxxxxx>
---
drivers/remoteproc/st_remoteproc.c | 91 +++++++++++++++++++++++++++++++++-----
1 file changed, 80 insertions(+), 11 deletions(-)
diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
index aacef0ea3b90..51049d17b1e5 100644
--- a/drivers/remoteproc/st_remoteproc.c
+++ b/drivers/remoteproc/st_remoteproc.c
@@ -19,6 +19,7 @@
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
@@ -91,6 +92,77 @@ static void st_rproc_kick(struct rproc *rproc, int vqid)
dev_err(dev, "failed to send message via mbox: %d\n", ret);
}
+static int st_rproc_mem_alloc(struct rproc *rproc,
+ struct rproc_mem_entry *mem)
+{
+ struct device *dev = rproc->dev.parent;
+ void *va;
+
+ va = ioremap_wc(mem->dma, mem->len);
+ if (!va) {
+ dev_err(dev, "Unable to map memory region: %pa+%zx\n",
+ &mem->dma, mem->len);
+ return -ENOMEM;
+ }
+
+ /* Update memory entry va */
+ mem->va = va;
+
+ return 0;
+}
+
+static int st_rproc_mem_release(struct rproc *rproc,
+ struct rproc_mem_entry *mem)
+{
+ iounmap(mem->va);
+
+ return 0;
+}
+
+static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
+{
+ struct device *dev = rproc->dev.parent;
+ struct device_node *np = dev->of_node;
+ struct rproc_mem_entry *mem;
+ struct reserved_mem *rmem;
+ struct of_phandle_iterator it;
+ int index = 0;
+
+ of_phandle_iterator_init(&it, np, "memory-region", NULL, 0);
+ while (of_phandle_iterator_next(&it) == 0) {
+ rmem = of_reserved_mem_lookup(it.node);
+ if (!rmem) {
+ dev_err(dev, "unable to acquire memory-region\n");
+ return -EINVAL;
+ }
+
+ /* No need to map vdev buffer */
+ if (strcmp(it.node->name, "vdev0buffer")) {
+ /* Register memory region */
+ mem = rproc_mem_entry_init(dev, NULL,
+ (dma_addr_t)rmem->base,
+ rmem->size, rmem->base,
+ st_rproc_mem_alloc,
+ st_rproc_mem_release,
+ it.node->name);
+ } else {
+ /* Register reserved memory for vdev buffer allocation */
+ mem = rproc_of_resm_mem_entry_init(dev, index,
+ rmem->size,
+ rmem->base,
+ it.node->name);
+ }
+
+ if (!mem)
+ return -ENOMEM;
+
+ rproc_add_carveout(rproc, mem);
+ index++;
+ }
+
+ return rproc_elf_load_rsc_table(rproc, fw);
+}
+
static int st_rproc_start(struct rproc *rproc)
{
struct st_rproc *ddata = rproc->priv;
@@ -158,9 +230,14 @@ static int st_rproc_stop(struct rproc *rproc)
}
static const struct rproc_ops st_rproc_ops = {
- .kick = st_rproc_kick,
- .start = st_rproc_start,
- .stop = st_rproc_stop,
+ .kick = st_rproc_kick,
+ .start = st_rproc_start,
+ .stop = st_rproc_stop,
+ .parse_fw = st_rproc_parse_fw,
+ .load = rproc_elf_load_segments,
+ .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
+ .sanity_check = rproc_elf_sanity_check,
+ .get_boot_addr = rproc_elf_get_boot_addr,
};
/*
@@ -254,12 +331,6 @@ static int st_rproc_parse_dt(struct platform_device *pdev)
return -EINVAL;
}
- err = of_reserved_mem_device_init(dev);
- if (err) {
- dev_err(dev, "Failed to obtain shared memory\n");
- return err;
- }
-
err = clk_prepare(ddata->clk);
if (err)
dev_err(dev, "failed to get clock\n");
@@ -387,8 +458,6 @@ static int st_rproc_remove(struct platform_device *pdev)
clk_disable_unprepare(ddata->clk);
- of_reserved_mem_device_release(&pdev->dev);
-
for (i = 0; i < ST_RPROC_MAX_VRING * MBOX_MAX; i++)
mbox_free_channel(ddata->mbox_chan[i]);
--
2.7.4
