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HID: intel-ish-hid: using list_head for ipc write queue 

Currently wr_msg_ctl_info is used in ishtp_device just for list head
purpose, using list_head directly can save ~150 bytes size for
each replacement.

Also this patch can save ~170 bytes of code size in intel-ish-ipc.ko.

Signed-off-by: Hong Liu <hong.liu@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Hong Liu 2018-09-11 16:44:21 -07:00 committed by Jiri Kosina
parent 946a7773dc
commit dc4e05d079
2 changed files with 15 additions and 19 deletions
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32
drivers/hid/intel-ish-hid/ipc/ipc.c
View File

@ -280,14 +280,14 @@ static int write_ipc_from_queue(struct ishtp_device *dev)
* if tx send list is empty - return 0;
* may happen, as RX_COMPLETE handler doesn't check list emptiness.
*/
if (list_empty(&dev->wr_processing_list_head.link)) {
if (list_empty(&dev->wr_processing_list)) {
spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags);
out_ipc_locked = 0;
return 0;
}
ipc_link = list_entry(dev->wr_processing_list_head.link.next,
struct wr_msg_ctl_info, link);
ipc_link = list_first_entry(&dev->wr_processing_list,
struct wr_msg_ctl_info, link);
/* first 4 bytes of the data is the doorbell value (IPC header) */
length = ipc_link->length - sizeof(uint32_t);
doorbell_val = *(uint32_t *)ipc_link->inline_data;
@ -338,7 +338,7 @@ static int write_ipc_from_queue(struct ishtp_device *dev)
ipc_send_compl = ipc_link->ipc_send_compl;
ipc_send_compl_prm = ipc_link->ipc_send_compl_prm;
list_del_init(&ipc_link->link);
list_add_tail(&ipc_link->link, &dev->wr_free_list_head.link);
list_add(&ipc_link->link, &dev->wr_free_list);
spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags);
/*
@ -372,18 +372,18 @@ static int write_ipc_to_queue(struct ishtp_device *dev,
unsigned char *msg, int length)
{
struct wr_msg_ctl_info *ipc_link;
unsigned long flags;
unsigned long flags;
if (length > IPC_FULL_MSG_SIZE)
return -EMSGSIZE;
spin_lock_irqsave(&dev->wr_processing_spinlock, flags);
if (list_empty(&dev->wr_free_list_head.link)) {
if (list_empty(&dev->wr_free_list)) {
spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags);
return -ENOMEM;
}
ipc_link = list_entry(dev->wr_free_list_head.link.next,
struct wr_msg_ctl_info, link);
ipc_link = list_first_entry(&dev->wr_free_list,
struct wr_msg_ctl_info, link);
list_del_init(&ipc_link->link);
ipc_link->ipc_send_compl = ipc_send_compl;
@ -391,7 +391,7 @@ static int write_ipc_to_queue(struct ishtp_device *dev,
ipc_link->length = length;
memcpy(ipc_link->inline_data, msg, length);
list_add_tail(&ipc_link->link, &dev->wr_processing_list_head.link);
list_add_tail(&ipc_link->link, &dev->wr_processing_list);
spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags);
write_ipc_from_queue(dev);
@ -487,17 +487,13 @@ static int ish_fw_reset_handler(struct ishtp_device *dev)
{
uint32_t reset_id;
unsigned long flags;
struct wr_msg_ctl_info *processing, *next;
/* Read reset ID */
reset_id = ish_reg_read(dev, IPC_REG_ISH2HOST_MSG) & 0xFFFF;
/* Clear IPC output queue */
spin_lock_irqsave(&dev->wr_processing_spinlock, flags);
list_for_each_entry_safe(processing, next,
&dev->wr_processing_list_head.link, link) {
list_move_tail(&processing->link, &dev->wr_free_list_head.link);
}
list_splice_init(&dev->wr_processing_list, &dev->wr_free_list);
spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags);
/* ISHTP notification in IPC_RESET */
@ -921,9 +917,9 @@ struct ishtp_device *ish_dev_init(struct pci_dev *pdev)
spin_lock_init(&dev->out_ipc_spinlock);
/* Init IPC processing and free lists */
INIT_LIST_HEAD(&dev->wr_processing_list_head.link);
INIT_LIST_HEAD(&dev->wr_free_list_head.link);
for (i = 0; i < IPC_TX_FIFO_SIZE; ++i) {
INIT_LIST_HEAD(&dev->wr_processing_list);
INIT_LIST_HEAD(&dev->wr_free_list);
for (i = 0; i < IPC_TX_FIFO_SIZE; i++) {
struct wr_msg_ctl_info *tx_buf;
tx_buf = devm_kzalloc(&pdev->dev,
@ -939,7 +935,7 @@ struct ishtp_device *ish_dev_init(struct pci_dev *pdev)
i);
break;
}
list_add_tail(&tx_buf->link, &dev->wr_free_list_head.link);
list_add_tail(&tx_buf->link, &dev->wr_free_list);
}
dev->ops = &ish_hw_ops;

2
drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h
View File

@ -207,7 +207,7 @@ struct ishtp_device {
struct work_struct bh_hbm_work;
/* IPC write queue */
struct wr_msg_ctl_info wr_processing_list_head, wr_free_list_head;
struct list_head wr_processing_list, wr_free_list;
/* For both processing list and free list */
spinlock_t wr_processing_spinlock;