Add a function to query for the preferred ring buffer size of VMBus device.
Signed-off-by: Saurabh Sengar <[email protected]> --- drivers/hv/channel_mgmt.c | 7 +++++-- drivers/hv/hyperv_vmbus.h | 5 +++++ include/linux/hyperv.h | 1 + 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 2f4d09ce027a..7ea444d72f9f 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -120,7 +120,8 @@ const struct vmbus_device vmbus_devs[] = { }, /* File copy */ - { .dev_type = HV_FCOPY, + { .pref_ring_size = 0x4000, + .dev_type = HV_FCOPY, HV_FCOPY_GUID, .perf_device = false, .allowed_in_isolated = false, @@ -141,11 +142,13 @@ const struct vmbus_device vmbus_devs[] = { }, /* Unknown GUID */ - { .dev_type = HV_UNKNOWN, + { .pref_ring_size = 0x11000, + .dev_type = HV_UNKNOWN, .perf_device = false, .allowed_in_isolated = false, }, }; +EXPORT_SYMBOL_GPL(vmbus_devs); static const struct { guid_t guid; diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index f6b1e710f805..76ac5185a01a 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -417,6 +417,11 @@ static inline bool hv_is_perf_channel(struct vmbus_channel *channel) return vmbus_devs[channel->device_id].perf_device; } +static inline size_t hv_dev_ring_size(struct vmbus_channel *channel) +{ + return vmbus_devs[channel->device_id].pref_ring_size; +} + static inline bool hv_is_allocated_cpu(unsigned int cpu) { struct vmbus_channel *channel, *sc; diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 2b00faf98017..5951c7bb5712 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -800,6 +800,7 @@ struct vmbus_requestor { #define VMBUS_RQST_RESET (U64_MAX - 3) struct vmbus_device { + size_t pref_ring_size; u16 dev_type; guid_t guid; bool perf_device; -- 2.34.1
