openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

hv_netvsc: make inline functions static 

Several new functions were introduced into hyperv.h but only used in one file.
Move them and let compiler decide on inline.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2016-08-23 12:17:48 -07:00 committed by David S. Miller
parent 796cc88c32
commit 30d1de08c8
2 changed files with 84 additions and 85 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/net/hyperv/netvsc.c
View File

@ -33,6 +33,89 @@
#include "hyperv_net.h"
/*
* An API to support in-place processing of incoming VMBUS packets.
*/
#define VMBUS_PKT_TRAILER 8
static struct vmpacket_descriptor *
get_next_pkt_raw(struct vmbus_channel *channel)
{
struct hv_ring_buffer_info *ring_info = &channel->inbound;
u32 read_loc = ring_info->priv_read_index;
void *ring_buffer = hv_get_ring_buffer(ring_info);
struct vmpacket_descriptor *cur_desc;
u32 packetlen;
u32 dsize = ring_info->ring_datasize;
u32 delta = read_loc - ring_info->ring_buffer->read_index;
u32 bytes_avail_toread = (hv_get_bytes_to_read(ring_info) - delta);
if (bytes_avail_toread < sizeof(struct vmpacket_descriptor))
return NULL;
if ((read_loc + sizeof(*cur_desc)) > dsize)
return NULL;
cur_desc = ring_buffer + read_loc;
packetlen = cur_desc->len8 << 3;
/*
* If the packet under consideration is wrapping around,
* return failure.
*/
if ((read_loc + packetlen + VMBUS_PKT_TRAILER) > (dsize - 1))
return NULL;
return cur_desc;
}
/*
* A helper function to step through packets "in-place"
* This API is to be called after each successful call
* get_next_pkt_raw().
*/
static void put_pkt_raw(struct vmbus_channel *channel,
struct vmpacket_descriptor *desc)
{
struct hv_ring_buffer_info *ring_info = &channel->inbound;
u32 read_loc = ring_info->priv_read_index;
u32 packetlen = desc->len8 << 3;
u32 dsize = ring_info->ring_datasize;
BUG_ON((read_loc + packetlen + VMBUS_PKT_TRAILER) > dsize);
/*
* Include the packet trailer.
*/
ring_info->priv_read_index += packetlen + VMBUS_PKT_TRAILER;
}
/*
* This call commits the read index and potentially signals the host.
* Here is the pattern for using the "in-place" consumption APIs:
*
* while (get_next_pkt_raw() {
* process the packet "in-place";
* put_pkt_raw();
* }
* if (packets processed in place)
* commit_rd_index();
*/
static void commit_rd_index(struct vmbus_channel *channel)
{
struct hv_ring_buffer_info *ring_info = &channel->inbound;
/*
* Make sure all reads are done before we update the read index since
* the writer may start writing to the read area once the read index
* is updated.
*/
virt_rmb();
ring_info->ring_buffer->read_index = ring_info->priv_read_index;
if (hv_need_to_signal_on_read(ring_info))
vmbus_set_event(channel);
}
/*
* Switch the data path from the synthetic interface to the VF
* interface.
@ -749,7 +832,7 @@ static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device,
return msg_size;
}
static inline int netvsc_send_pkt(
static int netvsc_send_pkt(
struct hv_device *device,
struct hv_netvsc_packet *packet,
struct netvsc_device *net_device,

84
include/linux/hyperv.h
View File

@ -1422,88 +1422,4 @@ static inline bool hv_need_to_signal_on_read(struct hv_ring_buffer_info *rbi)
return false;
}
/*
* An API to support in-place processing of incoming VMBUS packets.
*/
#define VMBUS_PKT_TRAILER 8
static inline struct vmpacket_descriptor *
get_next_pkt_raw(struct vmbus_channel *channel)
{
struct hv_ring_buffer_info *ring_info = &channel->inbound;
u32 read_loc = ring_info->priv_read_index;
void *ring_buffer = hv_get_ring_buffer(ring_info);
struct vmpacket_descriptor *cur_desc;
u32 packetlen;
u32 dsize = ring_info->ring_datasize;
u32 delta = read_loc - ring_info->ring_buffer->read_index;
u32 bytes_avail_toread = (hv_get_bytes_to_read(ring_info) - delta);
if (bytes_avail_toread < sizeof(struct vmpacket_descriptor))
return NULL;
if ((read_loc + sizeof(*cur_desc)) > dsize)
return NULL;
cur_desc = ring_buffer + read_loc;
packetlen = cur_desc->len8 << 3;
/*
* If the packet under consideration is wrapping around,
* return failure.
*/
if ((read_loc + packetlen + VMBUS_PKT_TRAILER) > (dsize - 1))
return NULL;
return cur_desc;
}
/*
* A helper function to step through packets "in-place"
* This API is to be called after each successful call
* get_next_pkt_raw().
*/
static inline void put_pkt_raw(struct vmbus_channel *channel,
struct vmpacket_descriptor *desc)
{
struct hv_ring_buffer_info *ring_info = &channel->inbound;
u32 read_loc = ring_info->priv_read_index;
u32 packetlen = desc->len8 << 3;
u32 dsize = ring_info->ring_datasize;
if ((read_loc + packetlen + VMBUS_PKT_TRAILER) > dsize)
BUG();
/*
* Include the packet trailer.
*/
ring_info->priv_read_index += packetlen + VMBUS_PKT_TRAILER;
}
/*
* This call commits the read index and potentially signals the host.
* Here is the pattern for using the "in-place" consumption APIs:
*
* while (get_next_pkt_raw() {
* process the packet "in-place";
* put_pkt_raw();
* }
* if (packets processed in place)
* commit_rd_index();
*/
static inline void commit_rd_index(struct vmbus_channel *channel)
{
struct hv_ring_buffer_info *ring_info = &channel->inbound;
/*
* Make sure all reads are done before we update the read index since
* the writer may start writing to the read area once the read index
* is updated.
*/
virt_rmb();
ring_info->ring_buffer->read_index = ring_info->priv_read_index;
if (hv_need_to_signal_on_read(ring_info))
vmbus_set_event(channel);
}
#endif /* _HYPERV_H */