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Date: Mon, 28 Mar 2016 21:35:22 -0700
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Andy Gross <andy.gross@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] soc: qcom: smd: Make callback pass channel reference
By passing the smd channel reference to the callback, rather than the
smd device, we can open additional smd channels from sub-devices of smd
devices.
Also updates the two smd clients today found in mainline.
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
drivers/soc/qcom/smd-rpm.c | 9 ++++++---
drivers/soc/qcom/smd.c | 22 ++++++++++++++++++----
drivers/soc/qcom/wcnss_ctrl.c | 8 ++++----
include/linux/soc/qcom/smd.h | 7 +++++--
4 files changed, 33 insertions(+), 13 deletions(-)
diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c
index 731fa066f712..6609d7e0edb0 100644
--- a/drivers/soc/qcom/smd-rpm.c
+++ b/drivers/soc/qcom/smd-rpm.c
@@ -33,6 +33,7 @@
*/
struct qcom_smd_rpm {
struct qcom_smd_channel *rpm_channel;
+ struct device *dev;
struct completion ack;
struct mutex lock;
@@ -149,14 +150,14 @@ out:
}
EXPORT_SYMBOL(qcom_rpm_smd_write);
-static int qcom_smd_rpm_callback(struct qcom_smd_device *qsdev,
+static int qcom_smd_rpm_callback(struct qcom_smd_channel *channel,
const void *data,
size_t count)
{
const struct qcom_rpm_header *hdr = data;
size_t hdr_length = le32_to_cpu(hdr->length);
const struct qcom_rpm_message *msg;
- struct qcom_smd_rpm *rpm = dev_get_drvdata(&qsdev->dev);
+ struct qcom_smd_rpm *rpm = qcom_smd_get_drvdata(channel);
const u8 *buf = data + sizeof(struct qcom_rpm_header);
const u8 *end = buf + hdr_length;
char msgbuf[32];
@@ -165,7 +166,7 @@ static int qcom_smd_rpm_callback(struct qcom_smd_device *qsdev,
if (le32_to_cpu(hdr->service_type) != RPM_SERVICE_TYPE_REQUEST ||
hdr_length < sizeof(struct qcom_rpm_message)) {
- dev_err(&qsdev->dev, "invalid request\n");
+ dev_err(rpm->dev, "invalid request\n");
return 0;
}
@@ -206,7 +207,9 @@ static int qcom_smd_rpm_probe(struct qcom_smd_device *sdev)
mutex_init(&rpm->lock);
init_completion(&rpm->ack);
+ rpm->dev = &sdev->dev;
rpm->rpm_channel = sdev->channel;
+ qcom_smd_set_drvdata(sdev->channel, rpm);
dev_set_drvdata(&sdev->dev, rpm);
diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c
index b6434c4be86a..ac1957dfdf24 100644
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -194,6 +194,8 @@ struct qcom_smd_channel {
int pkt_size;
+ void *drvdata;
+
struct list_head list;
struct list_head dev_list;
};
@@ -513,7 +515,6 @@ static void qcom_smd_channel_advance(struct qcom_smd_channel *channel,
*/
static int qcom_smd_channel_recv_single(struct qcom_smd_channel *channel)
{
- struct qcom_smd_device *qsdev = channel->qsdev;
unsigned tail;
size_t len;
void *ptr;
@@ -533,7 +534,7 @@ static int qcom_smd_channel_recv_single(struct qcom_smd_channel *channel)
len = channel->pkt_size;
}
- ret = channel->cb(qsdev, ptr, len);
+ ret = channel->cb(channel, ptr, len);
if (ret < 0)
return ret;
@@ -1034,6 +1035,18 @@ int qcom_smd_driver_register(struct qcom_smd_driver *qsdrv)
}
EXPORT_SYMBOL(qcom_smd_driver_register);
+void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel)
+{
+ return channel->drvdata;
+}
+EXPORT_SYMBOL(qcom_smd_get_drvdata);
+
+void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data)
+{
+ channel->drvdata = data;
+}
+EXPORT_SYMBOL(qcom_smd_set_drvdata);
+
/**
* qcom_smd_driver_unregister - unregister a smd driver
* @qsdrv: qcom_smd_driver struct
@@ -1079,12 +1092,13 @@ qcom_smd_find_channel(struct qcom_smd_edge *edge, const char *name)
* Returns a channel handle on success, or -EPROBE_DEFER if the channel isn't
* ready.
*/
-struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_device *sdev,
+struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *parent,
const char *name,
qcom_smd_cb_t cb)
{
struct qcom_smd_channel *channel;
- struct qcom_smd_edge *edge = sdev->channel->edge;
+ struct qcom_smd_device *sdev = parent->qsdev;
+ struct qcom_smd_edge *edge = parent->edge;
int ret;
/* Wait up to HZ for the channel to appear */
diff --git a/drivers/soc/qcom/wcnss_ctrl.c b/drivers/soc/qcom/wcnss_ctrl.c
index 7a986f881d5c..c544f3d2c6ee 100644
--- a/drivers/soc/qcom/wcnss_ctrl.c
+++ b/drivers/soc/qcom/wcnss_ctrl.c
@@ -100,17 +100,17 @@ struct wcnss_download_nv_resp {
/**
* wcnss_ctrl_smd_callback() - handler from SMD responses
- * @qsdev: smd device handle
+ * @channel: smd channel handle
* @data: pointer to the incoming data packet
* @count: size of the incoming data packet
*
* Handles any incoming packets from the remote WCNSS_CTRL service.
*/
-static int wcnss_ctrl_smd_callback(struct qcom_smd_device *qsdev,
+static int wcnss_ctrl_smd_callback(struct qcom_smd_channel *channel,
const void *data,
size_t count)
{
- struct wcnss_ctrl *wcnss = dev_get_drvdata(&qsdev->dev);
+ struct wcnss_ctrl *wcnss = qcom_smd_get_drvdata(channel);
const struct wcnss_download_nv_resp *nvresp;
const struct wcnss_version_resp *version;
const struct wcnss_msg_hdr *hdr = data;
@@ -246,7 +246,7 @@ static int wcnss_ctrl_probe(struct qcom_smd_device *sdev)
init_completion(&wcnss->ack);
INIT_WORK(&wcnss->download_nv_work, wcnss_download_nv);
- dev_set_drvdata(&sdev->dev, wcnss);
+ qcom_smd_set_drvdata(sdev->channel, wcnss);
return wcnss_request_version(wcnss);
}
diff --git a/include/linux/soc/qcom/smd.h b/include/linux/soc/qcom/smd.h
index bd51c8a9d807..cb2f81559bc0 100644
--- a/include/linux/soc/qcom/smd.h
+++ b/include/linux/soc/qcom/smd.h
@@ -26,7 +26,7 @@ struct qcom_smd_device {
struct qcom_smd_channel *channel;
};
-typedef int (*qcom_smd_cb_t)(struct qcom_smd_device *, const void *, size_t);
+typedef int (*qcom_smd_cb_t)(struct qcom_smd_channel *, const void *, size_t);
/**
* struct qcom_smd_driver - smd driver struct
@@ -50,13 +50,16 @@ struct qcom_smd_driver {
int qcom_smd_driver_register(struct qcom_smd_driver *drv);
void qcom_smd_driver_unregister(struct qcom_smd_driver *drv);
+void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel);
+void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data);
+
#define module_qcom_smd_driver(__smd_driver) \
module_driver(__smd_driver, qcom_smd_driver_register, \
qcom_smd_driver_unregister)
int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
-struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_device *sdev,
+struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *channel,
const char *name,
qcom_smd_cb_t cb);
--
2.5.0
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