soc: qcom: smd: Use correct remote processor ID

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

Signed-off-by: Andy Gross <agross@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt
index f65c76d..97d9b3e 100644 (file)
--- 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..edd9d9a 100644 (file)
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -96,6 +96,7 @@ static const struct {
  * @smd:               handle to qcom_smd
  * @of_node:           of_node handle for information related to this edge
  * @edge_id:           identifier of this edge
+ * @remote_pid:                identifier of remote processor
  * @irq:               interrupt for signals on this edge
  * @ipc_regmap:                regmap handle holding the outgoing ipc register
  * @ipc_offset:                offset within @ipc_regmap of the register for ipc
@@ -111,6 +112,7 @@ struct qcom_smd_edge {
        struct qcom_smd *smd;
        struct device_node *of_node;
        unsigned edge_id;
+       unsigned remote_pid;
 
        int irq;
 
@@ -572,7 +574,7 @@ 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 +978,8 @@ 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 +1000,8 @@ 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 +1045,7 @@ 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 +1188,10 @@ 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");