2013-04-19 18:18:13

by Tomas Winkler

[permalink] [raw]
Subject: [char-misc-next 1/3] mei: revamp mei_amthif_irq_read_message

Rename the function to mei_amthif_irq_read_msg
and change parameters order

Signed-off-by: Tomas Winkler <[email protected]>
---
drivers/misc/mei/amthif.c | 10 +++++-----
drivers/misc/mei/interrupt.c | 2 +-
drivers/misc/mei/mei_dev.h | 9 +++++++++
3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index 9a5e8c7..31a6212 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -505,14 +505,15 @@ int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
* mei_amthif_irq_read_message - read routine after ISR to
* handle the read amthif message
*
- * @complete_list: An instance of our list structure
* @dev: the device structure
* @mei_hdr: header of amthif message
+ * @complete_list: An instance of our list structure
*
* returns 0 on success, <0 on failure.
*/
-int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
- struct mei_device *dev, struct mei_msg_hdr *mei_hdr)
+int mei_amthif_irq_read_msg(struct mei_device *dev,
+ struct mei_msg_hdr *mei_hdr,
+ struct mei_cl_cb *complete_list)
{
struct mei_cl_cb *cb;
unsigned char *buffer;
@@ -530,8 +531,7 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
if (!mei_hdr->msg_complete)
return 0;

- dev_dbg(&dev->pdev->dev,
- "amthif_message_buffer_index =%d\n",
+ dev_dbg(&dev->pdev->dev, "amthif_message_buffer_index =%d\n",
mei_hdr->length);

dev_dbg(&dev->pdev->dev, "completed amthif read.\n ");
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 653fcfb..9bf64c0 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -427,7 +427,7 @@ int mei_irq_read_handler(struct mei_device *dev,
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));

- ret = mei_amthif_irq_read_message(cmpl_list, dev, mei_hdr);
+ ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list);
if (ret)
goto end;
} else {
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 56dee56..c91c492 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -502,6 +502,15 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,

void mei_amthif_run_next_cmd(struct mei_device *dev);

+int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
+ struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list);
+
+void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb);
+int mei_amthif_irq_read_msg(struct mei_device *dev,
+ struct mei_msg_hdr *mei_hdr,
+ struct mei_cl_cb *complete_list);
+int mei_amthif_irq_read(struct mei_device *dev, s32 *slots);
+
/*
* NFC functions
*/
--
1.8.1.2


2013-04-19 18:18:18

by Tomas Winkler

[permalink] [raw]
Subject: [char-misc-next 3/3 V2] mei: reseting -> resetting

From: Bill Nottingham <[email protected]>

This enum leaks out to userspace via error messages, so fix the spelling.

Signed-off-by: Bill Nottingham <[email protected]>
Signed-off-by: Tomas Winkler <[email protected]>
---
V2: rebased

drivers/misc/mei/hbm.c | 8 ++++----
drivers/misc/mei/hw-me.c | 2 +-
drivers/misc/mei/init.c | 4 ++--
drivers/misc/mei/mei_dev.h | 2 +-
4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 4de80d9..db605f5 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -52,7 +52,7 @@ static void mei_hbm_me_cl_allocate(struct mei_device *dev)
sizeof(struct mei_me_client), GFP_KERNEL);
if (!clients) {
dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
- dev->dev_state = MEI_DEV_RESETING;
+ dev->dev_state = MEI_DEV_RESETTING;
mei_reset(dev, 1);
return;
}
@@ -167,7 +167,7 @@ int mei_hbm_start_req(struct mei_device *dev)
dev->hbm_state = MEI_HBM_IDLE;
if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
dev_err(&dev->pdev->dev, "version message writet failed\n");
- dev->dev_state = MEI_DEV_RESETING;
+ dev->dev_state = MEI_DEV_RESETTING;
mei_reset(dev, 1);
return -ENODEV;
}
@@ -196,7 +196,7 @@ static void mei_hbm_enum_clients_req(struct mei_device *dev)
enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;

if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev->dev_state = MEI_DEV_RESETING;
+ dev->dev_state = MEI_DEV_RESETTING;
dev_err(&dev->pdev->dev, "enumeration request write failed.\n");
mei_reset(dev, 1);
}
@@ -249,7 +249,7 @@ static int mei_hbm_prop_req(struct mei_device *dev)
prop_req->address = next_client_index;

if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev->dev_state = MEI_DEV_RESETING;
+ dev->dev_state = MEI_DEV_RESETTING;
dev_err(&dev->pdev->dev, "properties request write failed\n");
mei_reset(dev, 1);

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 3d6dfa3..fc03227 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -481,7 +481,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)

/* check if ME wants a reset */
if (!mei_hw_is_ready(dev) &&
- dev->dev_state != MEI_DEV_RESETING &&
+ dev->dev_state != MEI_DEV_RESETTING &&
dev->dev_state != MEI_DEV_INITIALIZING) {
dev_dbg(&dev->pdev->dev, "FW not ready.\n");
mei_reset(dev, 1);
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 59159e0..713d89f 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -33,7 +33,7 @@ const char *mei_dev_state_str(int state)
MEI_DEV_STATE(INITIALIZING);
MEI_DEV_STATE(INIT_CLIENTS);
MEI_DEV_STATE(ENABLED);
- MEI_DEV_STATE(RESETING);
+ MEI_DEV_STATE(RESETTING);
MEI_DEV_STATE(DISABLED);
MEI_DEV_STATE(POWER_DOWN);
MEI_DEV_STATE(POWER_UP);
@@ -146,7 +146,7 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
if (dev->dev_state != MEI_DEV_INITIALIZING) {
if (dev->dev_state != MEI_DEV_DISABLED &&
dev->dev_state != MEI_DEV_POWER_DOWN)
- dev->dev_state = MEI_DEV_RESETING;
+ dev->dev_state = MEI_DEV_RESETTING;

mei_cl_all_disconnect(dev);

diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index c91c492..4de5140 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -97,7 +97,7 @@ enum mei_dev_state {
MEI_DEV_INITIALIZING = 0,
MEI_DEV_INIT_CLIENTS,
MEI_DEV_ENABLED,
- MEI_DEV_RESETING,
+ MEI_DEV_RESETTING,
MEI_DEV_DISABLED,
MEI_DEV_POWER_DOWN,
MEI_DEV_POWER_UP
--
1.8.1.2

2013-04-19 18:18:43

by Tomas Winkler

[permalink] [raw]
Subject: [char-misc-next 2/3] mei: fix reading large reposnes

While writting to device is limitted to max_msg_length advertized
in client properites the read can be much longer delivered consequiting chunks.

We use krealloc to enlarge the buffer when needed.

Signed-off-by: Tomas Winkler <[email protected]>
---
drivers/misc/mei/bus.c | 8 ++++----
drivers/misc/mei/client.c | 7 ++++---
drivers/misc/mei/client.h | 2 +-
drivers/misc/mei/interrupt.c | 18 +++++++++++++++---
drivers/misc/mei/main.c | 7 +++----
5 files changed, 27 insertions(+), 15 deletions(-)

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 834ceeb..1e935ea 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -286,7 +286,7 @@ int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
mutex_lock(&dev->device_lock);

if (!cl->read_cb) {
- err = mei_cl_read_start(cl);
+ err = mei_cl_read_start(cl, length);
if (err < 0) {
mutex_unlock(&dev->device_lock);
return err;
@@ -378,7 +378,7 @@ static void mei_bus_event_work(struct work_struct *work)
device->events = 0;

/* Prepare for the next read */
- mei_cl_read_start(device->cl);
+ mei_cl_read_start(device->cl, 0);
}

int mei_cl_register_event_cb(struct mei_cl_device *device,
@@ -392,7 +392,7 @@ int mei_cl_register_event_cb(struct mei_cl_device *device,
device->event_context = context;
INIT_WORK(&device->event_work, mei_bus_event_work);

- mei_cl_read_start(device->cl);
+ mei_cl_read_start(device->cl, 0);

return 0;
}
@@ -436,7 +436,7 @@ int mei_cl_enable_device(struct mei_cl_device *device)
mutex_unlock(&dev->device_lock);

if (device->event_cb && !cl->read_cb)
- mei_cl_read_start(device->cl);
+ mei_cl_read_start(device->cl, 0);

if (!device->ops || !device->ops->enable)
return 0;
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 9541aa9..7189274 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -624,7 +624,7 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
*
* returns 0 on success, <0 on failure.
*/
-int mei_cl_read_start(struct mei_cl *cl)
+int mei_cl_read_start(struct mei_cl *cl, size_t length)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
@@ -657,8 +657,9 @@ int mei_cl_read_start(struct mei_cl *cl)
if (!cb)
return -ENOMEM;

- rets = mei_io_cb_alloc_resp_buf(cb,
- dev->me_clients[i].props.max_msg_length);
+ /* always allocate at least client max message */
+ length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
+ rets = mei_io_cb_alloc_resp_buf(cb, length);
if (rets)
goto err;

diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
index e890c8b..cfdb144 100644
--- a/drivers/misc/mei/client.h
+++ b/drivers/misc/mei/client.h
@@ -87,7 +87,7 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
bool mei_cl_is_other_connecting(struct mei_cl *cl);
int mei_cl_disconnect(struct mei_cl *cl);
int mei_cl_connect(struct mei_cl *cl, struct file *file);
-int mei_cl_read_start(struct mei_cl *cl);
+int mei_cl_read_start(struct mei_cl *cl, size_t length);
int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking);

void mei_host_client_init(struct work_struct *work);
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 9bf64c0..7473071 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -145,9 +145,21 @@ static int mei_cl_irq_read_msg(struct mei_device *dev,
}

if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) {
- dev_warn(&dev->pdev->dev, "message overflow.\n");
- list_del(&cb->list);
- return -ENOMEM;
+ dev_dbg(&dev->pdev->dev, "message overflow. size %d len %d idx %ld\n",
+ cb->response_buffer.size,
+ mei_hdr->length, cb->buf_idx);
+ cb->response_buffer.data =
+ krealloc(cb->response_buffer.data,
+ mei_hdr->length + cb->buf_idx,
+ GFP_KERNEL);
+
+ if (!cb->response_buffer.data) {
+ dev_err(&dev->pdev->dev, "allocation failed.\n");
+ list_del(&cb->list);
+ return -ENOMEM;
+ }
+ cb->response_buffer.size =
+ mei_hdr->length + cb->buf_idx;
}

buffer = cb->response_buffer.data + cb->buf_idx;
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 78b4da5..7c44c8d 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -244,7 +244,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
goto out;
}

- err = mei_cl_read_start(cl);
+ err = mei_cl_read_start(cl, length);
if (err && err != -EBUSY) {
dev_dbg(&dev->pdev->dev,
"mei start read failure with status = %d\n", err);
@@ -292,9 +292,8 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
}
/* now copy the data to user space */
copy_buffer:
- dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n",
- cb->response_buffer.size);
- dev_dbg(&dev->pdev->dev, "cb->buf_idx - %lu\n", cb->buf_idx);
+ dev_dbg(&dev->pdev->dev, "buf.size = %d buf.idx= %ld\n",
+ cb->response_buffer.size, cb->buf_idx);
if (length == 0 || ubuf == NULL || *offset > cb->buf_idx) {
rets = -EMSGSIZE;
goto free;
--
1.8.1.2

2013-04-19 18:25:47

by Greg KH

[permalink] [raw]
Subject: Re: [char-misc-next 2/3] mei: fix reading large reposnes

On Fri, Apr 19, 2013 at 09:16:54PM +0300, Tomas Winkler wrote:
> While writting to device is limitted to max_msg_length advertized
> in client properites the read can be much longer delivered consequiting chunks.
>
> We use krealloc to enlarge the buffer when needed.
>
> Signed-off-by: Tomas Winkler <[email protected]>

Patch 1/3 had some fuzz in interrupt.c, so I fixed that up by hand, but
this one just fails to apply at all:
checking file drivers/misc/mei/bus.c
checking file drivers/misc/mei/client.c
checking file drivers/misc/mei/client.h
checking file drivers/misc/mei/interrupt.c
Hunk #1 FAILED at 145.
1 out of 1 hunk FAILED
checking file drivers/misc/mei/main.c

So something is out of sync between us.

Care to refresh this patch based on my latest tree, and 3/3, and resend
them?

thanks,

greg k-h

2013-04-19 18:59:55

by Tomas Winkler

[permalink] [raw]
Subject: RE: [char-misc-next 2/3] mei: fix reading large reposnes

>
> On Fri, Apr 19, 2013 at 09:16:54PM +0300, Tomas Winkler wrote:
> > While writting to device is limitted to max_msg_length advertized in
> > client properites the read can be much longer delivered consequiting
> chunks.
> >
> > We use krealloc to enlarge the buffer when needed.
> >
> > Signed-off-by: Tomas Winkler <[email protected]>
>
> Patch 1/3 had some fuzz in interrupt.c, so I fixed that up by hand, but this
> one just fails to apply at all:
> checking file drivers/misc/mei/bus.c
> checking file drivers/misc/mei/client.c
> checking file drivers/misc/mei/client.h
> checking file drivers/misc/mei/interrupt.c
> Hunk #1 FAILED at 145.
> 1 out of 1 hunk FAILED
> checking file drivers/misc/mei/main.c
>
> So something is out of sync between us.
>
> Care to refresh this patch based on my latest tree, and 3/3, and resend
> them?
Grrr, I sent you one patch less, I've rebased this new spelling fix and missed to count it in.
I'm resending the missing patches.

Tomas