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From: Max Gurtovoy <maxg@mellanox.com>
To: linux-nvme@lists.infradead.org, kbusch@kernel.org, hch@lst.de,
	sagi@grimberg.me, martin.petersen@oracle.com
Cc: axboe@kernel.dk, vladimirk@mellanox.com, shlomin@mellanox.com,
	israelr@mellanox.com, idanb@mellanox.com, oren@mellanox.com,
	maxg@mellanox.com
Subject: [PATCH 05/15] nvme: Introduce NVME_INLINE_PROT_SG_CNT
Date: Mon,  6 Jan 2020 15:37:26 +0200	[thread overview]
Message-ID: <20200106133736.123038-7-maxg@mellanox.com> (raw)
In-Reply-To: <20200106133736.123038-1-maxg@mellanox.com>

From: Israel Rukshin <israelr@mellanox.com>

SGL size of PI metadata is usually small. Thus, 1 inline sg should
cover most cases. The macro will be used for pre-allocate a single SGL
entry for protection information. The preallocation of small inline SGLs
depends on SG_CHAIN capability so if the ARCH doesn't support SG_CHAIN,
use the runtime allocation for the SGL. This patch is a preparation for
adding metadata (T10-PI) over fabric support.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
---
 drivers/nvme/host/nvme.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 0f8aacf..5c94fcf 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -30,8 +30,10 @@
 
 #ifdef CONFIG_ARCH_NO_SG_CHAIN
 #define  NVME_INLINE_SG_CNT  0
+#define  NVME_INLINE_PROT_SG_CNT  0
 #else
 #define  NVME_INLINE_SG_CNT  2
+#define  NVME_INLINE_PROT_SG_CNT  1
 #endif
 
 extern struct workqueue_struct *nvme_wq;
-- 
1.8.3.1


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  parent reply	other threads:[~2020-01-06 13:38 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-06 13:37 [PATCH 00/15 V3] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-01-06 13:37 ` [PATCH] nvme-cli/fabrics: Add pi_enable param to connect cmd Max Gurtovoy
2020-01-06 13:37 ` [PATCH 01/15] nvme: Introduce namespace features flag Max Gurtovoy
2020-01-07 18:07   ` Keith Busch
2020-01-08 12:00     ` Max Gurtovoy
2020-01-09  3:11   ` Martin K. Petersen
2020-01-09 10:38     ` Max Gurtovoy
2020-01-09 16:26       ` Keith Busch
2020-01-12  9:40         ` Max Gurtovoy
2020-01-13 20:31           ` Keith Busch
2020-01-14 16:04             ` Max Gurtovoy
2020-01-12  9:40         ` Max Gurtovoy
2020-01-06 13:37 ` [PATCH 02/15] nvme: Enforce extended LBA format for fabrics metadata Max Gurtovoy
2020-01-16 23:53   ` James Smart
2020-01-19 11:20     ` Max Gurtovoy
2020-01-21 17:40       ` James Smart
2020-01-06 13:37 ` [PATCH 03/15] nvme: Introduce max_integrity_segments ctrl attribute Max Gurtovoy
2020-01-09  3:12   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 04/15] nvme-fabrics: Allow user enabling metadata/T10-PI support Max Gurtovoy
2020-01-06 13:37 ` Max Gurtovoy [this message]
2020-01-09  3:13   ` [PATCH 05/15] nvme: Introduce NVME_INLINE_PROT_SG_CNT Martin K. Petersen
2020-01-06 13:37 ` [PATCH 06/15] nvme-rdma: Introduce nvme_rdma_sgl structure Max Gurtovoy
2020-01-06 13:37 ` [PATCH 07/15] nvme-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-01-06 13:37 ` [PATCH 08/15] nvmet: Prepare metadata request Max Gurtovoy
2020-01-06 13:37 ` [PATCH 09/15] nvmet: Add metadata characteristics for a namespace Max Gurtovoy
2020-01-09  3:16   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 10/15] nvmet: Rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2020-01-09  3:17   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 11/15] nvmet: Rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2020-01-09  3:19   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 12/15] nvme: Add Metadata Capabilities enumerations Max Gurtovoy
2020-01-06 13:37 ` [PATCH 13/15] nvmet: Add metadata/T10-PI support Max Gurtovoy
2020-01-09  3:24   ` Martin K. Petersen
2020-01-27 17:17     ` Max Gurtovoy
2020-01-29  2:32       ` Martin K. Petersen
2020-01-17 16:46   ` James Smart
2020-01-19 13:47     ` Max Gurtovoy
2020-01-06 13:37 ` [PATCH 14/15] nvmet: Add metadata support for block devices Max Gurtovoy
2020-01-06 13:37 ` [PATCH 15/15] nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-01-09  3:29   ` Martin K. Petersen

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