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From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Sreekanth Reddy <sreekanth.reddy@avagotech.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
	jejb@kernel.org,
	"James E.J. Bottomley" <JBottomley@parallels.com>,
	linux-scsi@vger.kernel.org,
	Sathya Prakash <Sathya.Prakash@avagotech.com>,
	Nagalakshmi Nandigama <Nagalakshmi.Nandigama@avagotech.com>,
	linux-kernel@vger.kernel.org,
	Christoph Hellwig <hch@infradead.org>
Subject: Re: [RESEND][PATCH 07/10][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support
Date: Wed, 23 Jul 2014 15:46:26 -0400	[thread overview]
Message-ID: <yq1r41bkgdp.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <CAK=zhgpDWJLBMBB1mV-7u+o_UC86PiOCAp4vi4-UAn_hXHtF2A@mail.gmail.com> (Sreekanth Reddy's message of "Wed, 23 Jul 2014 23:07:37 +0530")

>>>>> "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

  reply	other threads:[~2014-07-23 19:46 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-25 10:34 [RESEND][PATCH 07/10][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support Reddy, Sreekanth
2014-06-25 10:34 ` Reddy, Sreekanth
2014-07-22  3:10 ` Martin K. Petersen
2014-07-22  3:10   ` Martin K. Petersen
     [not found]   ` <CAK=zhgoQt5J=jh4jShAy5rBXNz34sN-tqf=uZDkY4zQJ9XhM5g@mail.gmail.com>
2014-07-23  1:25     ` Martin K. Petersen
2014-07-23 17:37       ` Sreekanth Reddy
2014-07-23 19:46         ` Martin K. Petersen [this message]
2014-07-25 12:57           ` Sreekanth Reddy
2014-07-25 19:43             ` Martin K. Petersen
2014-07-30 14:55               ` Sreekanth Reddy
2014-08-05 18:46                 ` Martin K. Petersen
     [not found]                   ` <CAK=zhgpqW-t11JKiBRRM7Z4TEMyaEUBX943qT8faaKPk6Pk4XA@mail.gmail.com>
     [not found]                     ` <CAK=zhgpiyt9xukGCNDOpEDmWRwFSMCcEiUQ190BW0UgiLGVP6g@mail.gmail.com>
2014-08-11 13:17                       ` Sreekanth Reddy
2014-08-12  2:32                       ` Martin K. Petersen
2017-04-25 11:51           ` Sreekanth Reddy
2017-04-26 22:25             ` Martin K. Petersen
2017-04-26 22:25               ` Martin K. Petersen
2017-04-27  9:15               ` Kashyap Desai
  -- strict thread matches above, loose matches on Subject: below --
2014-08-12  9:24 Sreekanth Reddy
2014-08-12  9:37 ` Joe Perches
2014-08-12  9:51   ` Sreekanth Reddy
2014-08-21 20:35 ` Martin K. Petersen
2014-08-23 15:04 [RESEND][PATCH 07/10] [SCSI] mpt2sas: " Sreekanth Reddy
2014-08-24 15:37 ` Christoph Hellwig

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