*/
+#include <linux/export.h>
#include <linux/pci.h>
#include <linux/kthread.h>
#include <linux/interrupt.h>
/**
- * mei_irq_complete_handler - processes completed operation.
+ * mei_cl_complete_handler - processes completed operation for a client
*
* @cl: private data of the file object.
- * @cb_pos: callback block.
+ * @cb: callback block.
*/
-void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos)
+static void mei_cl_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb)
{
- if (cb_pos->fop_type == MEI_FOP_WRITE) {
- mei_io_cb_free(cb_pos);
- cb_pos = NULL;
+ if (cb->fop_type == MEI_FOP_WRITE) {
+ mei_io_cb_free(cb);
+ cb = NULL;
cl->writing_state = MEI_WRITE_COMPLETE;
if (waitqueue_active(&cl->tx_wait))
wake_up_interruptible(&cl->tx_wait);
- } else if (cb_pos->fop_type == MEI_FOP_READ &&
+ } else if (cb->fop_type == MEI_FOP_READ &&
MEI_READING == cl->reading_state) {
cl->reading_state = MEI_READ_COMPLETE;
if (waitqueue_active(&cl->rx_wait))
wake_up_interruptible(&cl->rx_wait);
+ else
+ mei_cl_bus_rx_event(cl);
+
+ }
+}
+
+/**
+ * mei_irq_compl_handler - dispatch complete handelers
+ * for the completed callbacks
+ *
+ * @dev - mei device
+ * @compl_list - list of completed cbs
+ */
+void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list)
+{
+ struct mei_cl_cb *cb, *next;
+ struct mei_cl *cl;
+
+ list_for_each_entry_safe(cb, next, &compl_list->list, list) {
+ cl = cb->cl;
+ list_del(&cb->list);
+ if (!cl)
+ continue;
+ dev_dbg(&dev->pdev->dev, "completing call back.\n");
+ if (cl == &dev->iamthif_cl)
+ mei_amthif_complete(dev, cb);
+ else
+ mei_cl_complete_handler(cl, cb);
}
}
+EXPORT_SYMBOL_GPL(mei_irq_compl_handler);
/**
- * _mei_irq_thread_state_ok - checks if mei header matches file private data
+ * mei_cl_hbm_equal - check if hbm is addressed to the client
*
- * @cl: private data of the file object
+ * @cl: host client
* @mei_hdr: header of mei client message
*
- * returns !=0 if matches, 0 if no match.
+ * returns true if matches, false otherwise
+ */
+static inline int mei_cl_hbm_equal(struct mei_cl *cl,
+ struct mei_msg_hdr *mei_hdr)
+{
+ return cl->host_client_id == mei_hdr->host_addr &&
+ cl->me_client_id == mei_hdr->me_addr;
+}
+/**
+ * mei_cl_is_reading - checks if the client
+ is the one to read this message
+ *
+ * @cl: mei client
+ * @mei_hdr: header of mei message
+ *
+ * returns true on match and false otherwise
*/
-static int _mei_irq_thread_state_ok(struct mei_cl *cl,
- struct mei_msg_hdr *mei_hdr)
+static bool mei_cl_is_reading(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr)
{
- return (cl->host_client_id == mei_hdr->host_addr &&
- cl->me_client_id == mei_hdr->me_addr &&
+ return mei_cl_hbm_equal(cl, mei_hdr) &&
cl->state == MEI_FILE_CONNECTED &&
- MEI_READ_COMPLETE != cl->reading_state);
+ cl->reading_state != MEI_READ_COMPLETE;
}
/**
- * mei_irq_thread_read_client_message - bottom half read routine after ISR to
- * handle the read mei client message data processing.
+ * mei_irq_read_client_message - process client message
*
- * @complete_list: An instance of our list structure
* @dev: the device structure
* @mei_hdr: header of mei client message
+ * @complete_list: An instance of our list structure
*
* returns 0 on success, <0 on failure.
*/
-static int mei_irq_thread_read_client_message(struct mei_cl_cb *complete_list,
- struct mei_device *dev,
- struct mei_msg_hdr *mei_hdr)
+static int mei_cl_irq_read_msg(struct mei_device *dev,
+ struct mei_msg_hdr *mei_hdr,
+ struct mei_cl_cb *complete_list)
{
struct mei_cl *cl;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
+ struct mei_cl_cb *cb, *next;
unsigned char *buffer = NULL;
- dev_dbg(&dev->pdev->dev, "start client msg\n");
- if (list_empty(&dev->read_list.list))
- goto quit;
+ list_for_each_entry_safe(cb, next, &dev->read_list.list, list) {
+ cl = cb->cl;
+ if (!cl || !mei_cl_is_reading(cl, mei_hdr))
+ continue;
- list_for_each_entry_safe(cb_pos, cb_next, &dev->read_list.list, list) {
- cl = cb_pos->cl;
- if (cl && _mei_irq_thread_state_ok(cl, mei_hdr)) {
- cl->reading_state = MEI_READING;
- buffer = cb_pos->response_buffer.data + cb_pos->buf_idx;
+ cl->reading_state = MEI_READING;
- if (cb_pos->response_buffer.size <
- mei_hdr->length + cb_pos->buf_idx) {
- dev_dbg(&dev->pdev->dev, "message overflow.\n");
- list_del(&cb_pos->list);
+ if (cb->response_buffer.size == 0 ||
+ cb->response_buffer.data == NULL) {
+ dev_err(&dev->pdev->dev, "response buffer is not allocated.\n");
+ list_del(&cb->list);
+ return -ENOMEM;
+ }
+
+ if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) {
+ dev_dbg(&dev->pdev->dev, "message overflow. size %d len %d idx %ld\n",
+ cb->response_buffer.size,
+ mei_hdr->length, cb->buf_idx);
+ buffer = krealloc(cb->response_buffer.data,
+ mei_hdr->length + cb->buf_idx,
+ GFP_KERNEL);
+
+ if (!buffer) {
+ dev_err(&dev->pdev->dev, "allocation failed.\n");
+ list_del(&cb->list);
return -ENOMEM;
}
- if (buffer)
- mei_read_slots(dev, buffer, mei_hdr->length);
-
- cb_pos->buf_idx += mei_hdr->length;
- if (mei_hdr->msg_complete) {
- cl->status = 0;
- list_del(&cb_pos->list);
- dev_dbg(&dev->pdev->dev,
- "completed read H cl = %d, ME cl = %d, length = %lu\n",
- cl->host_client_id,
- cl->me_client_id,
- cb_pos->buf_idx);
-
- list_add_tail(&cb_pos->list,
- &complete_list->list);
- }
-
- break;
+ cb->response_buffer.data = buffer;
+ cb->response_buffer.size =
+ mei_hdr->length + cb->buf_idx;
}
+ buffer = cb->response_buffer.data + cb->buf_idx;
+ mei_read_slots(dev, buffer, mei_hdr->length);
+
+ cb->buf_idx += mei_hdr->length;
+ if (mei_hdr->msg_complete) {
+ cl->status = 0;
+ list_del(&cb->list);
+ dev_dbg(&dev->pdev->dev, "completed read H cl = %d, ME cl = %d, length = %lu\n",
+ cl->host_client_id,
+ cl->me_client_id,
+ cb->buf_idx);
+ list_add_tail(&cb->list, &complete_list->list);
+ }
+ break;
}
-quit:
dev_dbg(&dev->pdev->dev, "message read\n");
if (!buffer) {
mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length);
struct mei_cl *cl,
struct mei_cl_cb *cmpl_list)
{
- if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_connect_request)))
- return -EBADMSG;
+ u32 msg_slots =
+ mei_data2slots(sizeof(struct hbm_client_connect_request));
- *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
+ if (*slots < msg_slots)
+ return -EMSGSIZE;
+
+ *slots -= msg_slots;
if (mei_hbm_cl_disconnect_req(dev, cl)) {
cl->status = 0;
cb_pos->buf_idx = 0;
list_move_tail(&cb_pos->list, &cmpl_list->list);
- return -EMSGSIZE;
- } else {
- cl->state = MEI_FILE_DISCONNECTING;
- cl->status = 0;
- cb_pos->buf_idx = 0;
- list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list);
- cl->timer_count = MEI_CONNECT_TIMEOUT;
+ return -EIO;
}
+ cl->state = MEI_FILE_DISCONNECTING;
+ cl->status = 0;
+ cb_pos->buf_idx = 0;
+ list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list);
+ cl->timer_count = MEI_CONNECT_TIMEOUT;
+
return 0;
}
struct mei_cl *cl,
struct mei_cl_cb *cmpl_list)
{
- if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_flow_control))) {
+ u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control));
+
+ if (*slots < msg_slots) {
/* return the cancel routine */
list_del(&cb_pos->list);
- return -EBADMSG;
+ return -EMSGSIZE;
}
- *slots -= mei_data2slots(sizeof(struct hbm_flow_control));
+ *slots -= msg_slots;
if (mei_hbm_cl_flow_control_req(dev, cl)) {
cl->status = -ENODEV;
struct mei_cl *cl,
struct mei_cl_cb *cmpl_list)
{
- if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_connect_request))) {
+ u32 msg_slots =
+ mei_data2slots(sizeof(struct hbm_client_connect_request));
+
+ if (*slots < msg_slots) {
/* return the cancel routine */
list_del(&cb_pos->list);
- return -EBADMSG;
+ return -EMSGSIZE;
}
+ *slots -= msg_slots;
+
cl->state = MEI_FILE_CONNECTING;
- *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
+
if (mei_hbm_cl_connect_req(dev, cl)) {
cl->status = -ENODEV;
cb_pos->buf_idx = 0;
struct mei_msg_hdr mei_hdr;
struct mei_cl *cl = cb->cl;
size_t len = cb->request_buffer.size - cb->buf_idx;
- size_t msg_slots = mei_data2slots(len);
+ u32 msg_slots = mei_data2slots(len);
mei_hdr.host_addr = cl->host_client_id;
mei_hdr.me_addr = cl->me_client_id;
return -ENODEV;
}
- if (mei_cl_flow_ctrl_reduce(cl))
- return -ENODEV;
cl->status = 0;
cb->buf_idx += mei_hdr.length;
- if (mei_hdr.msg_complete)
+ if (mei_hdr.msg_complete) {
+ if (mei_cl_flow_ctrl_reduce(cl))
+ return -ENODEV;
list_move_tail(&cb->list, &dev->write_waiting_list.list);
+ }
return 0;
}
" client = %d, ME client = %d\n",
cl_pos->host_client_id,
cl_pos->me_client_id);
- if (cl_pos->host_client_id == mei_hdr->host_addr &&
- cl_pos->me_client_id == mei_hdr->me_addr)
+ if (mei_cl_hbm_equal(cl_pos, mei_hdr))
break;
}
}
}
if (((*slots) * sizeof(u32)) < mei_hdr->length) {
- dev_dbg(&dev->pdev->dev,
+ dev_err(&dev->pdev->dev,
"we can't read the message slots =%08x.\n",
*slots);
/* we can't read the message */
} else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
(MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
(dev->iamthif_state == MEI_IAMTHIF_READING)) {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
+ 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 {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n");
- ret = mei_irq_thread_read_client_message(cmpl_list,
- dev, mei_hdr);
+ dev_dbg(&dev->pdev->dev, "call mei_cl_irq_read_msg.\n");
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
+ ret = mei_cl_irq_read_msg(dev, mei_hdr, cmpl_list);
if (ret)
goto end;
-
}
/* reset the number of slots and header */
if (*slots == -EOVERFLOW) {
/* overflow - reset */
- dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n");
+ dev_err(&dev->pdev->dev, "resetting due to slots overflow.\n");
/* set the event since message has been read */
ret = -ERANGE;
goto end;
end:
return ret;
}
+EXPORT_SYMBOL_GPL(mei_irq_read_handler);
/**
*
* returns 0 on success, <0 on failure.
*/
-int mei_irq_write_handler(struct mei_device *dev,
- struct mei_cl_cb *cmpl_list)
+int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
{
struct mei_cl *cl;
}
return 0;
}
+EXPORT_SYMBOL_GPL(mei_irq_write_handler);
if (dev->dev_state == MEI_DEV_INIT_CLIENTS) {
if (dev->init_clients_timer) {
if (--dev->init_clients_timer == 0) {
- dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n",
- dev->init_clients_state);
+ dev_err(&dev->pdev->dev, "reset: init clients timeout hbm_state = %d.\n",
+ dev->hbm_state);
mei_reset(dev, 1);
}
}
list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
if (cl_pos->timer_count) {
if (--cl_pos->timer_count == 0) {
- dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n");
+ dev_err(&dev->pdev->dev, "reset: connect/disconnect timeout.\n");
mei_reset(dev, 1);
goto out;
}
if (dev->iamthif_stall_timer) {
if (--dev->iamthif_stall_timer == 0) {
- dev_dbg(&dev->pdev->dev, "resetting because of hang to amthi.\n");
+ dev_err(&dev->pdev->dev, "reset: amthif hanged.\n");
mei_reset(dev, 1);
dev->iamthif_msg_buf_size = 0;
dev->iamthif_msg_buf_index = 0;
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