[PATCH v2] soc: qcom: smd: Use correct remote processor ID

Andy Gross
2015-08-26T19:42:57Z

This patch fixes SMEM addressing issues when remote processors need to use
secure SMEM partitions.

Signed-off-by: Andy Gross <agross@codeaurora.org>
---
.../devicetree/bindings/soc/qcom/qcom,smd.txt | 6 ++++++
drivers/soc/qcom/smd.c | 15 +++++++++++----
2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt
index f65c76d..97d9b3e 100644
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt
@@ -37,6 +37,12 @@ The edge is described by the following properties:
Definition: the identifier of the remote processor in the smd channel
allocation table

+- qcom,remote-pid:
+ Usage: optional
+ Value type: <u32>
+ Definition: the identifier for the remote processor as known by the rest
+ of the system.
+
= SMD DEVICES

In turn, subnodes of the "edges" represent devices tied to SMD channels on that
diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c
index 327adcf..5706a81 100644
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -111,6 +111,7 @@ struct qcom_smd_edge {
struct qcom_smd *smd;
struct device_node *of_node;
unsigned edge_id;
+ unsigned remote_pid;

int irq;

@@ -572,7 +573,7 @@ static irqreturn_t qcom_smd_edge_intr(int irq, void *data)
* have to scan if the amount of available space in smem have changed
* since last scan.
*/
- available = qcom_smem_get_free_space(edge->edge_id);
+ available = qcom_smem_get_free_space(edge->remote_pid);
if (available != edge->smem_available) {
edge->smem_available = available;
edge->need_rescan = true;
@@ -976,7 +977,8 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed
spin_lock_init(&channel->recv_lock);
init_waitqueue_head(&channel->fblockread_event);

- ret = qcom_smem_get(edge->edge_id, smem_info_item, (void **)&info, &info_size);
+ ret = qcom_smem_get(edge->remote_pid, smem_info_item, (void **)&info,
+ &info_size);
if (ret)
goto free_name_and_channel;

@@ -997,7 +999,8 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed
goto free_name_and_channel;
}

- ret = qcom_smem_get(edge->edge_id, smem_fifo_item, &fifo_base, &fifo_size);
+ ret = qcom_smem_get(edge->remote_pid, smem_fifo_item, &fifo_base,
+ &fifo_size);
if (ret)
goto free_name_and_channel;

@@ -1041,7 +1044,7 @@ static void qcom_discover_channels(struct qcom_smd_edge *edge)
int i;

for (tbl = 0; tbl < SMD_ALLOC_TBL_COUNT; tbl++) {
- ret = qcom_smem_get(edge->edge_id,
+ ret = qcom_smem_get(edge->remote_pid,
smem_items[tbl].alloc_tbl_id,
(void **)&alloc_tbl,
NULL);
@@ -1184,6 +1187,10 @@ static int qcom_smd_parse_edge(struct device *dev,
return -EINVAL;
}

+ edge->remote_pid = QCOM_SMEM_HOST_ANY;
+ key = "qcom,remote-pid";
+ of_property_read_u32(node, key, &edge->remote_pid);
+
syscon_np = of_parse_phandle(node, "qcom,ipc", 0);
if (!syscon_np) {
dev_err(dev, "no qcom,ipc node\n");
--
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