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Fri, 24 Feb 2023 17:45:22 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64%7]) with mapi id 15.20.6156.007; Fri, 24 Feb 2023 17:45:22 +0000 From: Mike Christie To: bvanassche@acm.org, hch@lst.de, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, james.bottomley@hansenpartnership.com, linux-block@vger.kernel.org, dm-devel@redhat.com, snitzer@kernel.org, axboe@kernel.dk, linux-nvme@lists.infradead.org, chaitanyak@nvidia.com, kbusch@kernel.org, target-devel@vger.kernel.org Cc: Mike Christie Subject: [PATCH v4 12/18] nvme: Add a nvme_pr_type enum Date: Fri, 24 Feb 2023 11:44:56 -0600 Message-Id: <20230224174502.321490-13-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR03CA0305.namprd03.prod.outlook.com (2603:10b6:8:2b::25) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 6540f1ab-ce3e-4f21-e941-08db168ee75b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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To prepare for that, this patch adds a nvme_pr_type enum and renames the nvme_pr_type function. Signed-off-by: Mike Christie Reviewed-by: Chaitanya Kulkarni --- Note for Chaitanya, Keith and Bart. For these patches where we convert between block and nvme pr values, it seemed like Chaitanya and Keith didn't have a strong preference. Bart had the suggestion to keep the switch and drop the default so the compiler can warn us if new types are added. This seemed like a nice benefit so I went that way. drivers/nvme/host/pr.c | 24 ++++++++++++------------ include/linux/nvme.h | 9 +++++++++ 2 files changed, 21 insertions(+), 12 deletions(-) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index ac6b9008e7e1..66086369dbce 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -6,24 +6,24 @@ #include "nvme.h" -static char nvme_pr_type(enum pr_type type) +static enum nvme_pr_type nvme_pr_type_from_blk(enum pr_type type) { switch (type) { case PR_WRITE_EXCLUSIVE: - return 1; + return NVME_PR_WRITE_EXCLUSIVE; case PR_EXCLUSIVE_ACCESS: - return 2; + return NVME_PR_EXCLUSIVE_ACCESS; case PR_WRITE_EXCLUSIVE_REG_ONLY: - return 3; + return NVME_PR_WRITE_EXCLUSIVE_REG_ONLY; case PR_EXCLUSIVE_ACCESS_REG_ONLY: - return 4; + return NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY; case PR_WRITE_EXCLUSIVE_ALL_REGS: - return 5; + return NVME_PR_WRITE_EXCLUSIVE_ALL_REGS; case PR_EXCLUSIVE_ACCESS_ALL_REGS: - return 6; - default: - return 0; + return NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS; } + + return 0; } static int nvme_send_ns_head_pr_command(struct block_device *bdev, @@ -124,7 +124,7 @@ static int nvme_pr_reserve(struct block_device *bdev, u64 key, if (flags & ~PR_FL_IGNORE_KEY) return -EOPNOTSUPP; - cdw10 = nvme_pr_type(type) << 8; + cdw10 = nvme_pr_type_from_blk(type) << 8; cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); } @@ -132,7 +132,7 @@ static int nvme_pr_reserve(struct block_device *bdev, u64 key, static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, enum pr_type type, bool abort) { - u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); + u32 cdw10 = nvme_pr_type_from_blk(type) << 8 | (abort ? 2 : 1); return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); } @@ -146,7 +146,7 @@ static int nvme_pr_clear(struct block_device *bdev, u64 key) static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) { - u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 0 : 1 << 3); + u32 cdw10 = nvme_pr_type_from_blk(type) << 8 | (key ? 0 : 1 << 3); return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); } diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 50fc596ec888..bae08167735a 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -759,6 +759,15 @@ enum { NVME_LBART_ATTRIB_HIDE = 1 << 1, }; +enum nvme_pr_type { + NVME_PR_WRITE_EXCLUSIVE = 1, + NVME_PR_EXCLUSIVE_ACCESS = 2, + NVME_PR_WRITE_EXCLUSIVE_REG_ONLY = 3, + NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY = 4, + NVME_PR_WRITE_EXCLUSIVE_ALL_REGS = 5, + NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS = 6, +}; + enum nvme_eds { NVME_EXTENDED_DATA_STRUCT = 0x1, };