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authorBjorn Andersson <quic_bjorande@quicinc.com>2023-02-13 18:52:11 +0300
committerBjorn Andersson <andersson@kernel.org>2023-02-14 19:19:38 +0300
commitab9fdd41d970c38ddc0fd59e5f8f37e8d966d454 (patch)
treedad0197a5e65f5d2394b0dd170be1a4a0d746de3 /drivers/rpmsg
parent8278fd3144779d883779d1f5bcbf49da36587fd1 (diff)
downloadlinux-ab9fdd41d970c38ddc0fd59e5f8f37e8d966d454.tar.xz
rpmsg: glink: smem: Wrap driver context
The Glink SMEM driver allocates a struct device and hangs two devres-allocated pipe objects thereon. To facilitate the move of interrupt and mailbox handling to the driver, introduce a wrapper object capturing the device, glink reference and remote processor id. The type of the remoteproc reference is updated, as these are specifically targeting the SMEM implementation. Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com> Reviewed-by: Chris Lew <quic_clew@quicinc.com> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230213155215.1237059-3-quic_bjorande@quicinc.com
Diffstat (limited to 'drivers/rpmsg')
-rw-r--r--drivers/rpmsg/qcom_glink_smem.c43
1 files changed, 32 insertions, 11 deletions
diff --git a/drivers/rpmsg/qcom_glink_smem.c b/drivers/rpmsg/qcom_glink_smem.c
index 579bc4443f6d..a9c477df4d68 100644
--- a/drivers/rpmsg/qcom_glink_smem.c
+++ b/drivers/rpmsg/qcom_glink_smem.c
@@ -33,6 +33,14 @@
#define SMEM_GLINK_NATIVE_XPRT_FIFO_0 479
#define SMEM_GLINK_NATIVE_XPRT_FIFO_1 480
+struct qcom_glink_smem {
+ struct device dev;
+
+ struct qcom_glink *glink;
+
+ u32 remote_pid;
+};
+
struct glink_smem_pipe {
struct qcom_glink_pipe native;
@@ -41,7 +49,7 @@ struct glink_smem_pipe {
void *fifo;
- int remote_pid;
+ struct qcom_glink_smem *smem;
};
#define to_smem_pipe(p) container_of(p, struct glink_smem_pipe, native)
@@ -49,13 +57,14 @@ struct glink_smem_pipe {
static size_t glink_smem_rx_avail(struct qcom_glink_pipe *np)
{
struct glink_smem_pipe *pipe = to_smem_pipe(np);
+ struct qcom_glink_smem *smem = pipe->smem;
size_t len;
void *fifo;
u32 head;
u32 tail;
if (!pipe->fifo) {
- fifo = qcom_smem_get(pipe->remote_pid,
+ fifo = qcom_smem_get(smem->remote_pid,
SMEM_GLINK_NATIVE_XPRT_FIFO_1, &len);
if (IS_ERR(fifo)) {
pr_err("failed to acquire RX fifo handle: %ld\n",
@@ -179,14 +188,17 @@ static void glink_smem_tx_write(struct qcom_glink_pipe *glink_pipe,
static void qcom_glink_smem_release(struct device *dev)
{
- kfree(dev);
+ struct qcom_glink_smem *smem = container_of(dev, struct qcom_glink_smem, dev);
+
+ kfree(smem);
}
-struct qcom_glink *qcom_glink_smem_register(struct device *parent,
- struct device_node *node)
+struct qcom_glink_smem *qcom_glink_smem_register(struct device *parent,
+ struct device_node *node)
{
struct glink_smem_pipe *rx_pipe;
struct glink_smem_pipe *tx_pipe;
+ struct qcom_glink_smem *smem;
struct qcom_glink *glink;
struct device *dev;
u32 remote_pid;
@@ -194,10 +206,12 @@ struct qcom_glink *qcom_glink_smem_register(struct device *parent,
size_t size;
int ret;
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
+ smem = kzalloc(sizeof(*smem), GFP_KERNEL);
+ if (!smem)
return ERR_PTR(-ENOMEM);
+ dev = &smem->dev;
+
dev->parent = parent;
dev->of_node = node;
dev->release = qcom_glink_smem_release;
@@ -216,6 +230,8 @@ struct qcom_glink *qcom_glink_smem_register(struct device *parent,
goto err_put_dev;
}
+ smem->remote_pid = remote_pid;
+
rx_pipe = devm_kzalloc(dev, sizeof(*rx_pipe), GFP_KERNEL);
tx_pipe = devm_kzalloc(dev, sizeof(*tx_pipe), GFP_KERNEL);
if (!rx_pipe || !tx_pipe) {
@@ -264,14 +280,14 @@ struct qcom_glink *qcom_glink_smem_register(struct device *parent,
goto err_put_dev;
}
+ rx_pipe->smem = smem;
rx_pipe->native.avail = glink_smem_rx_avail;
rx_pipe->native.peak = glink_smem_rx_peak;
rx_pipe->native.advance = glink_smem_rx_advance;
- rx_pipe->remote_pid = remote_pid;
+ tx_pipe->smem = smem;
tx_pipe->native.avail = glink_smem_tx_avail;
tx_pipe->native.write = glink_smem_tx_write;
- tx_pipe->remote_pid = remote_pid;
*rx_pipe->tail = 0;
*tx_pipe->head = 0;
@@ -285,7 +301,10 @@ struct qcom_glink *qcom_glink_smem_register(struct device *parent,
goto err_put_dev;
}
- return glink;
+ smem->glink = glink;
+
+ return smem;
+
err_put_dev:
device_unregister(dev);
@@ -294,8 +313,10 @@ err_put_dev:
}
EXPORT_SYMBOL_GPL(qcom_glink_smem_register);
-void qcom_glink_smem_unregister(struct qcom_glink *glink)
+void qcom_glink_smem_unregister(struct qcom_glink_smem *smem)
{
+ struct qcom_glink *glink = smem->glink;
+
qcom_glink_native_remove(glink);
qcom_glink_native_unregister(glink);
}