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uio_hv_generic: Query the ringbuffer size for device

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Query the ring buffer size from pre defined table per device
and use that value for allocating the ring buffer for that
device. Keep the size as current default which is 2 MB if
the device doesn't have any preferred ring size.

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Link: https://lore.kernel.org/r/1711788723-8593-3-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Saurabh Sengar 2024-03-30 01:51:58 -07:00 committed by Greg Kroah-Hartman
parent e8c4bd6c6e
commit e566ed5b64
1 changed files with 5 additions and 2 deletions
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7
drivers/uio/uio_hv_generic.c
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@ -238,6 +238,7 @@ hv_uio_probe(struct hv_device *dev,
struct hv_uio_private_data *pdata;
void *ring_buffer;
int ret;
size_t ring_size = hv_dev_ring_size(channel);
/* Communicating with host has to be via shared memory not hypercall */
if (!channel->offermsg.monitor_allocated) {
@ -245,12 +246,14 @@ hv_uio_probe(struct hv_device *dev,
return -ENOTSUPP;
}
if (!ring_size)
ring_size = HV_RING_SIZE * PAGE_SIZE;
pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
ret = vmbus_alloc_ring(channel, HV_RING_SIZE * PAGE_SIZE,
HV_RING_SIZE * PAGE_SIZE);
ret = vmbus_alloc_ring(channel, ring_size, ring_size);
if (ret)
return ret;