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Mon, 30 Mar 2026 10:37:25 +0000 Message-ID: Date: Mon, 30 Mar 2026 12:37:24 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 01/15] nvmet: Rapid Path Failure Recovery set controller identify fields To: Mohamed Khalfella , Justin Tee , Naresh Gottumukkala , Paul Ely , Chaitanya Kulkarni , Jens Axboe , Keith Busch , Sagi Grimberg , James Smart Cc: Aaron Dailey , Randy Jennings , Dhaval Giani , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260328004518.1729186-1-mkhalfella@purestorage.com> <20260328004518.1729186-2-mkhalfella@purestorage.com> Content-Language: en-US From: Hannes Reinecke In-Reply-To: <20260328004518.1729186-2-mkhalfella@purestorage.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Action: no action X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_TO(0.00)[purestorage.com,broadcom.com,gmail.com,nvidia.com,kernel.dk,kernel.org,grimberg.me]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FUZZY_RATELIMITED(0.00)[rspamd.com]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; ARC_NA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[14]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:104:10:150:64:97:from,2a07:de40:b281:106:10:150:64:167:received]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns] X-Rspamd-Queue-Id: 674FB4D1F1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260330_033729_047368_2168835F X-CRM114-Status: GOOD ( 12.45 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 3/28/26 01:43, Mohamed Khalfella wrote: > TP8028 Rapid Path Failure Recovery defined new fields in controller > identify response. The newly defined fields are: > > - CIU (Controller Instance UNIQUIFIER): is an 8bit non-zero value that > is assigned a random value when controller is first created. The value > is expected to be incremented when RDY bit in CSTS register is asserted > - CIRN (Controller Instance Random Number): is 64bit random value that > gets generated when controller is created. CIRN is regenerated everytime > RDY bit is CSTS register is asserted. > - CCRL (Cross-Controller Reset Limit) is an 8bit value that defines the > maximum number of in-progress controller reset operations. CCRL is > hardcoded to 4 as recommended by TP8028. > > Signed-off-by: Mohamed Khalfella > --- > drivers/nvme/target/admin-cmd.c | 5 +++++ > drivers/nvme/target/core.c | 9 +++++++++ > drivers/nvme/target/nvmet.h | 2 ++ > include/linux/nvme.h | 10 ++++++++-- > 4 files changed, 24 insertions(+), 2 deletions(-) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich