Re: [PATCH v3 2/3] drivers: remoteproc: xilinx: fix carveout names
From: Tanmay Shah
Date: Wed Feb 22 2023 - 15:47:14 EST
Hi Mathieu,
Thanks for the reviews. I agree to all the comments and will address in
the next revision accordingly.
Thanks,
Tanmay
On 2/22/23 10:41 AM, Mathieu Poirier wrote:
On Mon, Feb 13, 2023 at 01:18:25PM -0800, Tanmay Shah wrote:
If the unit address is appended to node name of memory-region,
then adding rproc carveouts fails as node name and unit-address
both are passed as carveout name (i.e. vdev0vring0@xxxxxxxx). However,
only node name is expected by remoteproc framework. This patch moves
memory-region node parsing from driver probe to prepare and
only passes node-name and not unit-address
Fixes: 6b291e8020a8 ("drivers: remoteproc: Add Xilinx r5 remoteproc driver")
Signed-off-by: Tanmay Shah <tanmay.shah@xxxxxxx>
---
Changelog:
- This is first version of this change, however posting as part of the series
that has version v3. The v2 of the series could be found at following link.
v2: https://lore.kernel.org/all/20230126213154.1707300-1-tanmay.shah@xxxxxxx/
drivers/remoteproc/xlnx_r5_remoteproc.c | 87 ++++++-------------------
1 file changed, 20 insertions(+), 67 deletions(-)
diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
index 2db57d394155..81af2dea56c2 100644
--- a/drivers/remoteproc/xlnx_r5_remoteproc.c
+++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
@@ -61,8 +61,6 @@ static const struct mem_bank_data zynqmp_tcm_banks[] = {
* @np: device node of RPU instance
* @tcm_bank_count: number TCM banks accessible to this RPU
* @tcm_banks: array of each TCM bank data
- * @rmem_count: Number of reserved mem regions
- * @rmem: reserved memory region nodes from device tree
* @rproc: rproc handle
* @pm_domain_id: RPU CPU power domain id
*/
@@ -71,8 +69,6 @@ struct zynqmp_r5_core {
struct device_node *np;
int tcm_bank_count;
struct mem_bank_data **tcm_banks;
- int rmem_count;
- struct reserved_mem **rmem;
struct rproc *rproc;
u32 pm_domain_id;
};
@@ -239,21 +235,31 @@ static int add_mem_regions_carveout(struct rproc *rproc)
{
struct rproc_mem_entry *rproc_mem;
struct zynqmp_r5_core *r5_core;
+ struct device_node *rmem_np;
struct reserved_mem *rmem;
int i, num_mem_regions;
r5_core = (struct zynqmp_r5_core *)rproc->priv;
- num_mem_regions = r5_core->rmem_count;
+
+ num_mem_regions = of_property_count_elems_of_size(r5_core->np, "memory-region",
+ sizeof(phandle));
for (i = 0; i < num_mem_regions; i++) {
- rmem = r5_core->rmem[i];
Extra line
Everyone else in the remoteproc subsystem is using of_phandle_iterator_next(),
please do the same. It is easier to maintain and you don't have to call
of_node_put() after each iteration.
- if (!strncmp(rmem->name, "vdev0buffer", strlen("vdev0buffer"))) {
+ rmem_np = of_parse_phandle(r5_core->np, "memory-region", i);
+
+ rmem = of_reserved_mem_lookup(rmem_np);
+ if (!rmem) {
+ of_node_put(rmem_np);
+ return -EINVAL;
+ }
+
+ if (!strcmp(rmem_np->name, "vdev0buffer")) {
/* Init reserved memory for vdev buffer */
rproc_mem = rproc_of_resm_mem_entry_init(&rproc->dev, i,
rmem->size,
rmem->base,
- rmem->name);
+ rmem_np->name);
} else {
/* Register associated reserved memory regions */
rproc_mem = rproc_mem_entry_init(&rproc->dev, NULL,
@@ -261,16 +267,20 @@ static int add_mem_regions_carveout(struct rproc *rproc)
rmem->size, rmem->base,
zynqmp_r5_mem_region_map,
zynqmp_r5_mem_region_unmap,
- rmem->name);
+ rmem_np->name);
}
- if (!rproc_mem)
+ if (!rproc_mem) {
+ of_node_put(rmem_np);
When moving to of_phandle_iterator_next(), of_node_put(it.node) has to be
called on error conditions. Other drivers don't do it, something I will fix in
the next cycle.
return -ENOMEM;
+ }
rproc_add_carveout(rproc, rproc_mem);
dev_dbg(&rproc->dev, "reserved mem carveout %s addr=%llx, size=0x%llx",
rmem->name, rmem->base, rmem->size);
+
+ of_node_put(rmem_np);
}
return 0;
@@ -726,59 +736,6 @@ static int zynqmp_r5_get_tcm_node(struct zynqmp_r5_cluster *cluster)
return 0;
}
-/**
- * zynqmp_r5_get_mem_region_node()
- * parse memory-region property and get reserved mem regions
- *
- * @r5_core: pointer to zynqmp_r5_core type object
- *
- * Return: 0 for success and error code for failure.
- */
-static int zynqmp_r5_get_mem_region_node(struct zynqmp_r5_core *r5_core)
-{
- struct device_node *np, *rmem_np;
- struct reserved_mem **rmem;
- int res_mem_count, i;
- struct device *dev;
-
- dev = r5_core->dev;
- np = r5_core->np;
-
- res_mem_count = of_property_count_elems_of_size(np, "memory-region",
- sizeof(phandle));
- if (res_mem_count <= 0) {
- dev_warn(dev, "failed to get memory-region property %d\n",
- res_mem_count);
- return 0;
- }
-
- rmem = devm_kcalloc(dev, res_mem_count,
- sizeof(struct reserved_mem *), GFP_KERNEL);
- if (!rmem)
- return -ENOMEM;
-
- for (i = 0; i < res_mem_count; i++) {
- rmem_np = of_parse_phandle(np, "memory-region", i);
- if (!rmem_np)
- goto release_rmem;
-
- rmem[i] = of_reserved_mem_lookup(rmem_np);
- if (!rmem[i]) {
- of_node_put(rmem_np);
- goto release_rmem;
- }
-
- of_node_put(rmem_np);
- }
-
- r5_core->rmem_count = res_mem_count;
- r5_core->rmem = rmem;
- return 0;
-
-release_rmem:
- return -EINVAL;
-}
-
/*
* zynqmp_r5_core_init()
* Create and initialize zynqmp_r5_core type object
@@ -806,10 +763,6 @@ static int zynqmp_r5_core_init(struct zynqmp_r5_cluster *cluster,
for (i = 0; i < cluster->core_count; i++) {
r5_core = cluster->r5_cores[i];
- ret = zynqmp_r5_get_mem_region_node(r5_core);
- if (ret)
- dev_warn(dev, "memory-region prop failed %d\n", ret);
-
/* Initialize r5 cores with power-domains parsed from dts */
ret = of_property_read_u32_index(r5_core->np, "power-domains",
1, &r5_core->pm_domain_id);
--
2.25.1