mei: use list for me clients book keeping
To support dynamic addition/remove of clients
it is more convenient to use list instead of
static array
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 0b21675..45659de 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -77,51 +77,20 @@
*/
void mei_hbm_reset(struct mei_device *dev)
{
- dev->me_clients_num = 0;
+ struct mei_me_client *me_cl, *next;
+
dev->me_client_presentation_num = 0;
dev->me_client_index = 0;
- kfree(dev->me_clients);
- dev->me_clients = NULL;
+ list_for_each_entry_safe(me_cl, next, &dev->me_clients, list) {
+ list_del(&me_cl->list);
+ kfree(me_cl);
+ }
mei_hbm_idle(dev);
}
/**
- * mei_hbm_me_cl_allocate - allocates storage for me clients
- *
- * @dev: the device structure
- *
- * returns 0 on success -ENOMEM on allocation failure
- */
-static int mei_hbm_me_cl_allocate(struct mei_device *dev)
-{
- struct mei_me_client *clients;
- int b;
-
- mei_hbm_reset(dev);
-
- /* count how many ME clients we have */
- for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
- dev->me_clients_num++;
-
- if (dev->me_clients_num == 0)
- return 0;
-
- dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%ld.\n",
- dev->me_clients_num * sizeof(struct mei_me_client));
- /* allocate storage for ME clients representation */
- clients = kcalloc(dev->me_clients_num,
- sizeof(struct mei_me_client), GFP_KERNEL);
- if (!clients) {
- dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
- return -ENOMEM;
- }
- dev->me_clients = clients;
- return 0;
-}
-
-/**
* mei_hbm_cl_hdr - construct client hbm header
*
* @cl: client
@@ -213,6 +182,8 @@
const size_t len = sizeof(struct hbm_host_version_request);
int ret;
+ mei_hbm_reset(dev);
+
mei_hbm_hdr(mei_hdr, len);
/* host start message */
@@ -267,6 +238,32 @@
return 0;
}
+/*
+ * mei_hbm_me_cl_add - add new me client to the list
+ *
+ * @dev: the device structure
+ * @res: hbm property response
+ *
+ * returns 0 on success and -ENOMEM on allocation failure
+ */
+
+static int mei_hbm_me_cl_add(struct mei_device *dev,
+ struct hbm_props_response *res)
+{
+ struct mei_me_client *me_cl;
+
+ me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL);
+ if (!me_cl)
+ return -ENOMEM;
+
+ me_cl->props = res->client_properties;
+ me_cl->client_id = res->me_addr;
+ me_cl->mei_flow_ctrl_creds = 0;
+
+ list_add(&me_cl->list, &dev->me_clients);
+ return 0;
+}
+
/**
* mei_hbm_prop_req - request property for a single client
*
@@ -282,11 +279,8 @@
struct hbm_props_request *prop_req;
const size_t len = sizeof(struct hbm_props_request);
unsigned long next_client_index;
- unsigned long client_num;
int ret;
- client_num = dev->me_client_presentation_num;
-
next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
dev->me_client_index);
@@ -298,15 +292,11 @@
return 0;
}
- dev->me_clients[client_num].client_id = next_client_index;
- dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
-
mei_hbm_hdr(mei_hdr, len);
prop_req = (struct hbm_props_request *)dev->wr_msg.data;
memset(prop_req, 0, sizeof(struct hbm_props_request));
-
prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
prop_req->me_addr = next_client_index;
@@ -441,11 +431,10 @@
list_for_each_entry(cl, &dev->file_list, link) {
if (mei_hbm_cl_addr_equal(cl, flow_control)) {
cl->mei_flow_ctrl_creds++;
- dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
- flow_control->host_addr, flow_control->me_addr);
- dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
- cl->mei_flow_ctrl_creds);
- break;
+ dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d creds %d.\n",
+ flow_control->host_addr, flow_control->me_addr,
+ cl->mei_flow_ctrl_creds);
+ break;
}
}
}
@@ -641,7 +630,6 @@
int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *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;
@@ -763,26 +751,6 @@
dev->init_clients_timer = 0;
- if (dev->me_clients == NULL) {
- dev_err(&dev->pdev->dev, "hbm: properties response: mei_clients not allocated\n");
- return -EPROTO;
- }
-
- props_res = (struct hbm_props_response *)mei_msg;
- me_client = &dev->me_clients[dev->me_client_presentation_num];
-
- if (props_res->status) {
- dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n",
- props_res->status);
- return -EPROTO;
- }
-
- if (me_client->client_id != props_res->me_addr) {
- dev_err(&dev->pdev->dev, "hbm: properties response: address mismatch %d ?= %d\n",
- me_client->client_id, props_res->me_addr);
- return -EPROTO;
- }
-
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n",
@@ -790,7 +758,16 @@
return -EPROTO;
}
- me_client->props = props_res->client_properties;
+ props_res = (struct hbm_props_response *)mei_msg;
+
+ if (props_res->status) {
+ dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n",
+ props_res->status);
+ return -EPROTO;
+ }
+
+ mei_hbm_me_cl_add(dev, props_res);
+
dev->me_client_index++;
dev->me_client_presentation_num++;
@@ -809,7 +786,7 @@
BUILD_BUG_ON(sizeof(dev->me_clients_map)
< sizeof(enum_res->valid_addresses));
memcpy(dev->me_clients_map, enum_res->valid_addresses,
- sizeof(enum_res->valid_addresses));
+ sizeof(enum_res->valid_addresses));
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
dev->hbm_state != MEI_HBM_ENUM_CLIENTS) {
@@ -818,11 +795,6 @@
return -EPROTO;
}
- if (mei_hbm_me_cl_allocate(dev)) {
- dev_err(&dev->pdev->dev, "hbm: enumeration response: cannot allocate clients array\n");
- return -ENOMEM;
- }
-
dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
/* first property request */