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Message-Id: <1353244400-9619-7-git-send-email-tomas.winkler@intel.com>
Date: Sun, 18 Nov 2012 15:13:20 +0200
From: Tomas Winkler <tomas.winkler@...el.com>
To: gregkh@...uxfoundation.org
Cc: arnd@...db.de, alan@...ux.intel.com, linux-kernel@...r.kernel.org,
Samuel Ortiz <sameo@...ux.intel.com>,
Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc-next 7/7] mei: Simplify the ME client enumeration code
From: Samuel Ortiz <sameo@...ux.intel.com>
After enumerating all ME clients we call the client init functions for
all matching UUIDs from a separate context.
This remove the hackish cascading client initialisation process that was
interleaving properties and connection command replies.
Signed-off-by: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
drivers/misc/mei/init.c | 99 ++++++++++++++++++++++++++++--------------
drivers/misc/mei/interrupt.c | 75 ++++++++++----------------------
drivers/misc/mei/main.c | 2 +
drivers/misc/mei/mei_dev.h | 5 ++-
4 files changed, 95 insertions(+), 86 deletions(-)
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 49600d6..a54cd55 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -423,54 +423,87 @@ void mei_allocate_me_clients_storage(struct mei_device *dev)
dev->me_clients = clients;
return ;
}
-/**
- * host_client_properties - reads properties for client
- *
- * @dev: the device structure
- *
- * returns:
- * < 0 - Error.
- * = 0 - no more clients.
- * = 1 - still have clients to send properties request.
- */
-int mei_host_client_properties(struct mei_device *dev)
+
+void mei_host_client_init(struct work_struct *work)
+{
+ struct mei_device *dev = container_of(work,
+ struct mei_device, init_work);
+ struct mei_client_properties *client_props;
+ int i;
+
+ mutex_lock(&dev->device_lock);
+
+ bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
+ dev->open_handle_count = 0;
+
+ /*
+ * Reserving the first three client IDs
+ * 0: Reserved for MEI Bus Message communications
+ * 1: Reserved for Watchdog
+ * 2: Reserved for AMTHI
+ */
+ bitmap_set(dev->host_clients_map, 0, 3);
+
+ for (i = 0; i < dev->me_clients_num; i++) {
+ client_props = &dev->me_clients[i].props;
+
+ if (!uuid_le_cmp(client_props->protocol_name, mei_amthi_guid))
+ mei_amthif_host_init(dev);
+ else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid))
+ mei_wd_host_init(dev);
+ }
+
+ dev->dev_state = MEI_DEV_ENABLED;
+
+ mutex_unlock(&dev->device_lock);
+}
+
+int mei_host_client_enumerate(struct mei_device *dev)
{
struct mei_msg_hdr *mei_hdr;
struct hbm_props_request *prop_req;
const size_t len = sizeof(struct hbm_props_request);
+ unsigned long next_client_index;
+ u8 client_num;
- int b;
- u8 client_num = dev->me_client_presentation_num;
- prop_req = (struct hbm_props_request *)&dev->wr_msg_buf[1];
+ client_num = dev->me_client_presentation_num;
- b = dev->me_client_index;
- b = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, b);
- if (b < MEI_CLIENTS_MAX) {
- dev->me_clients[client_num].client_id = b;
- dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
- mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
+ next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
+ dev->me_client_index);
+ /* We got all client properties */
+ if (next_client_index == MEI_CLIENTS_MAX) {
+ schedule_work(&dev->init_work);
- memset(prop_req, 0, sizeof(struct hbm_props_request));
+ return 0;
+ }
- prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
- prop_req->address = b;
+ dev->me_clients[client_num].client_id = next_client_index;
+ dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
+
+ mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
+ prop_req = (struct hbm_props_request *)&dev->wr_msg_buf[1];
+
+ memset(prop_req, 0, sizeof(struct hbm_props_request));
- if (mei_write_message(dev, mei_hdr,
- (unsigned char *)prop_req, len)) {
- dev->dev_state = MEI_DEV_RESETING;
- dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
- mei_reset(dev, 1);
- return -EIO;
- }
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
- dev->me_client_index = b;
- return 1;
+ prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
+ prop_req->address = next_client_index;
+
+ if (mei_write_message(dev, mei_hdr, (unsigned char *) prop_req,
+ mei_hdr->length)) {
+ dev->dev_state = MEI_DEV_RESETING;
+ dev_err(&dev->pdev->dev, "Properties request command failed\n");
+ mei_reset(dev, 1);
+
+ return -EIO;
}
+ dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->me_client_index = next_client_index;
+
return 0;
}
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index e5aa0ed..04fa213 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -252,8 +252,6 @@ static void mei_client_connect_response(struct mei_device *dev,
dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
mei_watchdog_register(dev);
- /* next step in the state maching */
- mei_amthif_host_init(dev);
return;
}
@@ -470,6 +468,7 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
struct mei_msg_hdr *mei_hdr)
{
struct mei_bus_message *mei_msg;
+ struct mei_me_client *me_client;
struct hbm_host_version_response *version_res;
struct hbm_client_connect_response *connect_res;
struct hbm_client_connect_response *disconnect_res;
@@ -478,8 +477,6 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
struct hbm_props_response *props_res;
struct hbm_host_enum_response *enum_res;
struct hbm_host_stop_request *stop_req;
- int res;
-
/* read the message to our buffer */
BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf));
@@ -547,64 +544,37 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
case HOST_CLIENT_PROPERTIES_RES_CMD:
props_res = (struct hbm_props_response *)mei_msg;
+ me_client = &dev->me_clients[dev->me_client_presentation_num];
+
if (props_res->status || !dev->me_clients) {
dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
mei_reset(dev, 1);
return;
}
- if (dev->me_clients[dev->me_client_presentation_num]
- .client_id == props_res->address) {
- dev->me_clients[dev->me_client_presentation_num].props
- = props_res->client_properties;
+ if (me_client->client_id != props_res->address) {
+ dev_err(&dev->pdev->dev,
+ "Host client properties reply mismatch\n");
+ mei_reset(dev, 1);
- if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
- dev->init_clients_state ==
- MEI_CLIENT_PROPERTIES_MESSAGE) {
- dev->me_client_index++;
- dev->me_client_presentation_num++;
-
- /** Send Client Properties request **/
- res = mei_host_client_properties(dev);
- if (res < 0) {
- dev_dbg(&dev->pdev->dev, "mei_host_client_properties() failed");
- return;
- } else if (!res) {
- /*
- * No more clients to send to.
- * Clear Map for indicating now ME clients
- * with associated host client
- */
- bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
- dev->open_handle_count = 0;
-
- /*
- * Reserving the first three client IDs
- * Client Id 0 - Reserved for MEI Bus Message communications
- * Client Id 1 - Reserved for Watchdog
- * Client ID 2 - Reserved for AMTHI
- */
- bitmap_set(dev->host_clients_map, 0, 3);
- dev->dev_state = MEI_DEV_ENABLED;
-
- /* if wd initialization fails, initialization the AMTHI client,
- * otherwise the AMTHI client will be initialized after the WD client connect response
- * will be received
- */
- if (mei_wd_host_init(dev))
- mei_amthif_host_init(dev);
- }
+ return;
+ }
- } else {
- dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message");
- mei_reset(dev, 1);
- return;
- }
- } else {
- dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message for wrong client ID\n");
+ if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
+ dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) {
+ dev_err(&dev->pdev->dev,
+ "Unexpected client properties reply\n");
mei_reset(dev, 1);
+
return;
}
+
+ me_client->props = props_res->client_properties;
+ dev->me_client_index++;
+ dev->me_client_presentation_num++;
+
+ mei_host_client_enumerate(dev);
+
break;
case HOST_ENUM_RES_CMD:
@@ -618,7 +588,8 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
mei_allocate_me_clients_storage(dev);
dev->init_clients_state =
MEI_CLIENT_PROPERTIES_MESSAGE;
- mei_host_client_properties(dev);
+
+ mei_host_client_enumerate(dev);
} else {
dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
mei_reset(dev, 1);
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 251aaff..7c9c381 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -829,6 +829,8 @@ static int __devinit mei_probe(struct pci_dev *pdev,
goto disable_msi;
}
INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
+ INIT_WORK(&dev->init_work, mei_host_client_init);
+
if (mei_hw_init(dev)) {
dev_err(&pdev->dev, "init hw failure.\n");
err = -ENODEV;
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 17d00aa..25da045 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -287,6 +287,8 @@ struct mei_device {
bool iamthif_flow_control_pending;
bool iamthif_ioctl;
bool iamthif_canceled;
+
+ struct work_struct init_work;
};
static inline unsigned long mei_secs_to_jiffies(unsigned long sec)
@@ -363,7 +365,8 @@ static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
*/
void mei_host_start_message(struct mei_device *dev);
void mei_host_enum_clients_message(struct mei_device *dev);
-int mei_host_client_properties(struct mei_device *dev);
+int mei_host_client_enumerate(struct mei_device *dev);
+void mei_host_client_init(struct work_struct *work);
/*
* MEI interrupt functions prototype
--
1.7.4.4
--
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