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Tue, 10 Aug 2021 03:56:31 +0000 To: Shai Malin Cc: , , , Manish Rangankar Subject: Re: [PATCH v2] scsi: qedi: Add support for fastpath doorvell recovery From: "Martin K. Petersen" Organization: Oracle Corporation Message-ID: References: <20210804221412.5048-1-smalin@marvell.com> Date: Mon, 09 Aug 2021 23:56:28 -0400 In-Reply-To: <20210804221412.5048-1-smalin@marvell.com> (Shai Malin's message of "Thu, 5 Aug 2021 01:14:12 +0300") Content-Type: text/plain X-ClientProxiedBy: SN7PR18CA0001.namprd18.prod.outlook.com (2603:10b6:806:f3::15) To PH0PR10MB4759.namprd10.prod.outlook.com (2603:10b6:510:3d::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from ca-mkp.ca.oracle.com (138.3.200.58) by SN7PR18CA0001.namprd18.prod.outlook.com (2603:10b6:806:f3::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4394.16 via Frontend Transport; Tue, 10 Aug 2021 03:56:30 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4a3faead-0361-4ce7-6e6a-08d95bb2d6aa X-MS-TrafficTypeDiagnostic: PH0PR10MB4808: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4125; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?0AMJpjCrJUnKayAzRL0lj6NlB8NHXU1JeN/N7K0/VBgLSu+GIGyZisYhUUTW?= =?us-ascii?Q?tcA9Ek6oXqZw8H28f5X51DAHvdjVrPr4a0j8wOkdcbcauf1j0UCDbmkzYWNf?= =?us-ascii?Q?N1Rv5tvu8Y7ky0RUwrlX80AAhe8UIFWo+1l8+MslgSv3WBeZaM5j9lEAVb8q?= =?us-ascii?Q?6xBbvoXxfYP4qvemPu1zzDtar+5r1V4gKP5d5Pk0FO6GS882VYKfXT36wEZw?= =?us-ascii?Q?sEUXLlG9a9Eogq1QGEnu/Lmq/KGhK+jLMZ4zG6WadZew086WGiePVeD8AXrM?= =?us-ascii?Q?rMfS3vmu4h1vzwvLUR9Bq/u1CWEH2Tjmb+6RU1Nv4r2DaLMJCthYTw25c0Uf?= =?us-ascii?Q?v82UENZ61/neQ2ovT6KCuF7ef4kdscx45QnETmVnk/lKhDVxNduMNtkBME+u?= =?us-ascii?Q?zXzGwUrbxg7BycLx6WSxhLLYBErwv1maedjZ7uYNahNtLR4UNkea8yuptmm7?= =?us-ascii?Q?7uiy3XkVVIvo8/d3JplDdyFOVHPuhXoTrPvZNPH1U3rT9f9HaIs2xS8TC/4A?= =?us-ascii?Q?Xix7H/lGW7AwW8BNWgGoLc8dWKrUoxOZEHswBxC2xNbCuk6q2OqYdXQm2gAG?= =?us-ascii?Q?eE3RwcpxX1KES+vl3c/FxLP4QHOPzuNY+Eh5GF7Z9UKzAW401QKIBzkqMcEO?= =?us-ascii?Q?rzp4BZPXJBUUeTZtkWGeCEMVeNlaoVDIoQNndrW9wa23a/OI+sIEbVzfwOqE?= =?us-ascii?Q?WNyEIKwJ9CozvJOmblp9OUqp2Qw6UMKG0Sdx4MjcxfS35apR86wqlMpJsWsu?= =?us-ascii?Q?P2GMybUhI4ar+8vJ9fPkOqH//9lrUXmt4z+Z+6TgvOd+D0NxKw3K32KEPHWs?= =?us-ascii?Q?6vfrYx4ZLQFYh8l//NFQNxT+UWUWR62Bn1vakdtaWOQnN5g5c7IcDnZFZM6K?= =?us-ascii?Q?lUO3gBytia9xU2sgMxKMEf8gt3mPPOgm7j0igtuWA/sYp4E1mpkn1HVE5Wg0?= =?us-ascii?Q?7kFvzID3lrRGY4kiYEKpB/pkePFhF/WceoSu7Pkxws6vjjfHVvgRxrSIheP4?= =?us-ascii?Q?bRPqb5kJb0WBUqC1nNY5osmhreNNME9867U7HjF12YES81TnoiqL25JrfHLV?= =?us-ascii?Q?0M7a+KMj2XSGYdzDo/2z9nBCUw5Vu8MKQwaodD3TIzHDVJsTxdHbp3706QPR?= =?us-ascii?Q?vjk97cpv5pLJrQSwbKpmheA6q3JgQtJ/2KNZqtSXB/Bg6CtkgyaqUxWNtZQ3?= =?us-ascii?Q?R0ywbeDPqG/N1+78g1H0NIcjNKCzbycsCWwNZ3vxnqgoiy/jidQEOn8bsPwM?= =?us-ascii?Q?V3QdOArGRlsiSttx4NrOzONmW8/Idsk2xg8UjjRxfSX0+fRl2OqJfkP7BwVZ?= =?us-ascii?Q?s3oXw4rmVMa0u2ONdf2pHNlV?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4a3faead-0361-4ce7-6e6a-08d95bb2d6aa X-MS-Exchange-CrossTenant-AuthSource: PH0PR10MB4759.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Aug 2021 03:56:31.4242 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: cL8cGmrEhYRtyOrypEFokZhCCSLkoChDLXLWn6Ct73H5M578E5Qpm4JY8mfT3Hfp5EHny/dJgJR64SFHEMuRWx2rfz6WC1khdeVQ7YsPplw= X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR10MB4808 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=10071 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=925 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108100024 X-Proofpoint-ORIG-GUID: s95ibUJmGjK7GLsRb7k5xpikCe8zzGKk X-Proofpoint-GUID: s95ibUJmGjK7GLsRb7k5xpikCe8zzGKk Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Shai, > Driver fastpath employs doorbells to indicate to the device that work > is available. Each doorbell translates to a message sent to the device > over the pci. These messages are queued by the doorbell queue HW > block, and handled by the HW. Applied to 5.15/scsi-staging, thanks! -- Martin K. Petersen Oracle Linux Engineering