From: Jason Gunthorpe <jgg@ziepe.ca>
To: Ajay Sharma <sharmaajay@microsoft.com>
Cc: Long Li <longli@microsoft.com>, KY Srinivasan <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Leon Romanovsky <leon@kernel.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: Re: [EXTERNAL] Re: [PATCH 05/12] net: mana: Set the DMA device max page size
Date: Wed, 18 May 2022 13:05:25 -0300 [thread overview]
Message-ID: <20220518160525.GP63055@ziepe.ca> (raw)
In-Reply-To: <BL1PR21MB3283790E8270ED6C639AAB0DD6D19@BL1PR21MB3283.namprd21.prod.outlook.com>
On Wed, May 18, 2022 at 05:59:00AM +0000, Ajay Sharma wrote:
> Thanks Long.
> Hello Jason,
> I am the author of the patch.
> To your comment below :
> " As I've already said, you are supposed to set the value that limits to ib_sge and *NOT* the value that is related to ib_umem_find_best_pgsz. It is usually 2G because the ib_sge's typically work on a 32 bit length."
>
> The ib_sge is limited by the __sg_alloc_table_from_pages() which
> uses ib_dma_max_seg_size() which is what is set by the eth driver
> using dma_set_max_seg_size() . Currently our hw does not support
> PTEs larger than 2M.
*sigh* again it has nothing to do with *PTEs* in the HW.
Jason
next prev parent reply other threads:[~2022-05-18 16:05 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-17 9:04 [PATCH 00/12] Introduce Microsoft Azure Network Adapter (MANA) RDMA driver longli
2022-05-17 9:04 ` [PATCH 01/12] net: mana: Add support for auxiliary device longli
2022-05-19 18:58 ` kernel test robot
2022-05-17 9:04 ` [PATCH 02/12] net: mana: Record the physical address for doorbell page region longli
2022-05-17 9:04 ` [PATCH 03/12] net: mana: Handle vport sharing between devices longli
2022-05-17 15:19 ` Stephen Hemminger
2022-05-17 23:39 ` Long Li
2022-05-17 9:04 ` [PATCH 04/12] net: mana: Add functions for allocating doorbell page from GDMA longli
2022-05-17 9:04 ` [PATCH 05/12] net: mana: Set the DMA device max page size longli
2022-05-17 14:59 ` Jason Gunthorpe
2022-05-17 19:32 ` Long Li
2022-05-17 19:35 ` Jason Gunthorpe
2022-05-17 20:04 ` Long Li
2022-05-18 0:03 ` Jason Gunthorpe
2022-05-18 5:59 ` [EXTERNAL] " Ajay Sharma
2022-05-18 16:05 ` Jason Gunthorpe [this message]
2022-05-18 21:05 ` Ajay Sharma
2022-05-18 23:11 ` Jason Gunthorpe
2022-05-19 0:37 ` Long Li
2022-05-17 9:04 ` [PATCH 06/12] net: mana: Define data structures for protection domain and memory registration longli
2022-05-17 9:04 ` [PATCH 07/12] net: mana: Export Work Queue functions for use by RDMA driver longli
2022-05-17 9:04 ` [PATCH 08/12] net: mana: Record port number in netdev longli
2022-05-17 9:04 ` [PATCH 09/12] net: mana: Move header files to a common location longli
2022-05-17 15:03 ` Jason Gunthorpe
2022-05-17 19:34 ` Long Li
2022-05-17 9:04 ` [PATCH 10/12] net: mana: Define max values for SGL entries longli
2022-05-17 9:04 ` [PATCH 11/12] net: mana: Define and process GDMA response code GDMA_STATUS_MORE_ENTRIES longli
2022-05-17 9:04 ` [PATCH 12/12] RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter longli
2022-05-17 15:24 ` Jason Gunthorpe
2022-05-19 5:57 ` Long Li
2022-05-19 12:49 ` Jason Gunthorpe
2022-05-19 17:50 ` Long Li
2022-05-17 23:40 ` kernel test robot
2022-05-18 1:14 ` kernel test robot
2022-05-19 21:42 ` kernel test robot
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