scsi: storvsc: Support PAGE_SIZE larger than 4K

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Hyper-V always use 4k page size (HV_HYP_PAGE_SIZE), so when
communicating with Hyper-V, a guest should always use HV_HYP_PAGE_SIZE
as the unit for page related data. For storvsc, the data is
vmbus_packet_mpb_array. And since in scsi_cmnd, sglist of pages (in unit
of PAGE_SIZE) is used, we need convert pages in the sglist of scsi_cmnd
into Hyper-V pages in vmbus_packet_mpb_array.

This patch does the conversion by dividing pages in sglist into Hyper-V
pages, offset and indexes in vmbus_packet_mpb_array are recalculated
accordingly.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200916034817.30282-12-boqun.feng@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

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Boqun Feng 2020-09-16 11:48:17 +08:00 • committed by Wei Liu

parent 061dc93ef6

commit 8f43710543

1 changed files with 49 additions and 7 deletions

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drivers/scsi/storvsc_drv.c

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