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vmbus: expose debug info for drivers 

Allow driver to get debug information about state of the ring.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Hemminger 2017-03-04 18:27:18 -07:00 committed by Greg Kroah-Hartman
parent 2a9d7de203
commit 4827ee1dca
3 changed files with 18 additions and 11 deletions
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11
drivers/hv/hyperv_vmbus.h
View File

@ -248,14 +248,6 @@ struct hv_context {
extern struct hv_context hv_context;
struct hv_ring_buffer_debug_info {
u32 current_interrupt_mask;
u32 current_read_index;
u32 current_write_index;
u32 bytes_avail_toread;
u32 bytes_avail_towrite;
};
/* Hv Interface */
extern int hv_init(void);
@ -289,9 +281,6 @@ int hv_ringbuffer_read(struct vmbus_channel *channel,
void *buffer, u32 buflen, u32 *buffer_actual_len,
u64 *requestid, bool raw);
void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
/*
* Maximum channels is determined by the size of the interrupt page
* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt

1
drivers/hv/ring_buffer.c
View File

@ -206,6 +206,7 @@ void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info,
ring_info->ring_buffer->interrupt_mask;
}
}
EXPORT_SYMBOL_GPL(hv_ringbuffer_get_debuginfo);
/* Initialize the ring buffer. */
int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,

17
include/linux/hyperv.h
View File

@ -491,6 +491,12 @@ struct vmbus_channel_rescind_offer {
u32 child_relid;
} __packed;
static inline u32
hv_ringbuffer_pending_size(const struct hv_ring_buffer_info *rbi)
{
return rbi->ring_buffer->pending_send_sz;
}
/*
* Request Offer -- no parameters, SynIC message contains the partition ID
* Set Snoop -- no parameters, SynIC message contains the partition ID
@ -1148,6 +1154,17 @@ static inline void *hv_get_drvdata(struct hv_device *dev)
return dev_get_drvdata(&dev->device);
}
struct hv_ring_buffer_debug_info {
u32 current_interrupt_mask;
u32 current_read_index;
u32 current_write_index;
u32 bytes_avail_toread;
u32 bytes_avail_towrite;
};
void hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
/* Vmbus interface */
#define vmbus_driver_register(driver) \
__vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)