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Suganath Prabu 8012209eb2 scsi: mpt3sas: Handle RDPQ DMA allocation in same 4G region
For INVADER_SERIES, each set of 8 reply queues (0 - 7, 8 - 15,..), and for
VENTURA_SERIES, each set of 16 reply queues (0 - 15, 16 - 31,..) need to be
within the same 4 GB boundary. Driver uses limitation of VENTURA_SERIES to
manage INVADER_SERIES as well. The driver is allocating the DMA able
memory for RDPQs accordingly.

1) At driver load, set DMA mask to 64 and allocate memory for RDPQs

2) Check if allocated resources for RDPQ are in the same 4GB range

3) If #2 is true, continue with 64 bit DMA and go to #6

4) If #2 is false, then free all the resources from #1

5) Set DMA mask to 32 and allocate RDPQs

6) Proceed with driver loading and other allocations

Link: https://lore.kernel.org/r/1587626596-1044-5-git-send-email-suganath-prabu.subramani@broadcom.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-04-24 13:08:18 -04:00
arch A set of three patches to fix the fallout of the newly added split lock 2020-04-12 10:17:16 -07:00
block block-5.7-2020-04-10 2020-04-10 10:06:54 -07:00
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Documentation Time(keeping) updates: 2020-04-12 10:13:14 -07:00
drivers scsi: mpt3sas: Handle RDPQ DMA allocation in same 4G region 2020-04-24 13:08:18 -04:00
fs 10 smb fixes most RDMA (smbdirect) related, also add experimental support for swap over SMB3 mounts, and also adds fix which improves performance of signed connections 2020-04-12 09:41:01 -07:00
include scsi: qed: Send BW update notifications to the protocol drivers 2020-04-17 17:55:26 -04:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.