Messages in this thread | | | Subject | Re: [RESEND][PATCH 07/10][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support | From | "Martin K. Petersen" <> | Date | Wed, 23 Jul 2014 15:46:26 -0400 |
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>>>>> "Sreekanth" == Sreekanth Reddy <sreekanth.reddy@avagotech.com> writes:
Sreekanth,
Sreekanth> 2. As per MPI Spec, each set of 8 reply descriptor post Sreekanth> queues must have the same value for the upper 32-bits of Sreekanth> their memory address. So allocated set of eight queues in a Sreekanth> single pool and added a new function is_MSB_are_same() to Sreekanth> check whether higher 32 bits of this pool memory address are Sreekanth> same or not. If this functions returns zero then we are Sreekanth> saving these pools in the bad_reply_post_pool list. then Sreekanth> releasing these pools once we get the required memory pools.
Why don't you just set pci_set_consistent_dma_mask() to DMA_BIT_MASK(32) before you allocate the queue entries?
-- Martin K. Petersen Oracle Linux Engineering
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