kernel/linux.git/include/linux/nvme.h, branch v5.10.258

nvme-pci: do not directly handle subsys reset fallout

2026-02-06T15:40:12+00:00

[ Upstream commit 210b1f6576e8b367907e7ff51ef425062e1468e4 ] Scheduling reset_work after a nvme subsystem reset is expected to fail on pcie, but this also prevents potential handling the platform's pcie services may provide that might successfully recovering the link without re-enumeration. Such examples include AER, DPC, and power's EEH. Provide a pci specific operation that safely initiates a subsystem reset, and instead of scheduling reset work, read back the status register to trigger a pcie read error. Since this only affects pci, the other fabrics drivers subscribe to a generic nvmf subsystem reset that is exactly the same as before. The loop fabric doesn't use it because nvmet doesn't support setting that property anyway. And since we're using the magic NSSR value in two places now, provide a symbolic define for it. Reported-by: Nilay Shroff Reviewed-by: Christoph Hellwig Signed-off-by: Keith Busch Stable-dep-of: 0edb475ac0a7 ("nvme: fix PCIe subsystem reset controller state transition") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

nvme: fixup comment for nvme RDMA Provider Type

2024-07-05T07:12:50+00:00

[ Upstream commit f80a55fa90fa76d01e3fffaa5d0413e522ab9a00 ] PRTYPE is the provider type, not the QP service type. Fixes: eb793e2c9286 ("nvme.h: add NVMe over Fabrics definitions") Signed-off-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Signed-off-by: Keith Busch Signed-off-by: Sasha Levin

nvme: handle the persistent internal error AER

2023-05-17T09:47:51+00:00

[ Upstream commit 2c61c97fb12b806e1c8eb15f04c277ad097ec95e ] In the NVM Express Revision 1.4 spec, Figure 145 describes possible values for an AER with event type "Error" (value 000b). For a Persistent Internal Error (value 03h), the host should perform a controller reset. Add support for this error using code that already exists for doing a controller reset. As part of this support, introduce two utility functions for parsing the AER type and subtype. This new support was tested in a lab environment where we can generate the persistent internal error on demand, and observe both the Linux side and NVMe controller side to see that the controller reset has been done. Signed-off-by: Michael Kelley Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe Stable-dep-of: 6622b76fe922 ("nvme: fix async event trace event") Signed-off-by: Sasha Levin

nvme: fix the NVME_CMD_EFFECTS_CSE_MASK definition

2023-01-14T09:16:25+00:00

[ Upstream commit 685e6311637e46f3212439ce2789f8a300e5050f ] 3 << 16 does not generate the correct mask for bits 16, 17 and 18. Use the GENMASK macro to generate the correct mask instead. Fixes: 84fef62d135b ("nvme: check admin passthru command effects") Signed-off-by: Christoph Hellwig Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Reviewed-by: Kanchan Joshi Signed-off-by: Sasha Levin

nvme-pci: allow use of cmb on v1.4 controllers

2021-02-07T14:37:16+00:00

[ Upstream commit 20d3bb92e84d417b0494a3b6867f0c86713db257 ] Since NVMe v1.4 the Controller Memory Buffer must be explicitly enabled by the host. Signed-off-by: Klaus Jensen [hch: avoid a local variable and add a comment] Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin

nvmet: add passthru code to process commands

2020-07-29T05:45:21+00:00

Add passthru command handling capability for the NVMeOF target and export passthru APIs which are used to integrate passthru code with nvmet-core. The new file passthru.c handles passthru cmd parsing and execution. In the passthru mode, we create a block layer request from the nvmet request and map the data on to the block layer request. Admin commands and features are on an allow list as there are a number of each that don't make too much sense with passthrough. We use an allow list such that new commands can be considered before being blindly passed through. In both cases, vendor specific commands are always allowed. We also reject reservation IO commands as the underlying device cannot differentiate between multiple hosts behind a fabric. Based-on-a-patch-by: Chaitanya Kulkarni Signed-off-by: Logan Gunthorpe Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig

nvme: support for zoned namespaces

2020-07-08T14:16:20+00:00

Add support for NVM Express Zoned Namespaces (ZNS) Command Set defined in NVM Express TP4053. Zoned namespaces are discovered based on their Command Set Identifier reported in the namespaces Namespace Identification Descriptor list. A successfully discovered Zoned Namespace will be registered with the block layer as a host managed zoned block device with Zone Append command support. A namespace that does not support append is not supported by the driver. Reviewed-by: Martin K. Petersen Reviewed-by: Johannes Thumshirn Reviewed-by: Hannes Reinecke Reviewed-by: Sagi Grimberg Reviewed-by: Javier González Reviewed-by: Himanshu Madhani Signed-off-by: Hans Holmberg Signed-off-by: Dmitry Fomichev Signed-off-by: Ajay Joshi Signed-off-by: Aravind Ramesh Signed-off-by: Niklas Cassel Signed-off-by: Matias Bjørling Signed-off-by: Damien Le Moal Signed-off-by: Keith Busch Signed-off-by: Christoph Hellwig

nvme: support for multiple Command Sets Supported and Effects log pages

2020-07-08T14:16:20+00:00

The Commands Supported and Effects log page was extended with a CSI field that enables the host to query the log page for each command set supported. Retrieve this log page for each command set that an attached namespace supports, and save a pointer to that log in the namespace head. Reviewed-by: Matias Bjørling Reviewed-by: Javier González Reviewed-by: Himanshu Madhani Reviewed-by: Martin K. Petersen Reviewed-by: Hannes Reinecke Reviewed-by: Johannes Thumshirn Reviewed-by: Daniel Wagner Signed-off-by: Keith Busch Signed-off-by: Christoph Hellwig

nvme: implement multiple I/O Command Set support

2020-07-08T14:16:19+00:00

Implements support for multiple I/O Command Sets. NVMe TP 4056 introduces a method to enumerate multiple command sets per namespace. If the command set is exposed, this method for enumeration will be used instead of the traditional method that uses the CC.CSS register command set register for command set identification. For namespaces where the Command Set Identifier is not supported or recognized, the specific namespace will not be created. Reviewed-by: Javier González Reviewed-by: Martin K. Petersen Reviewed-by: Johannes Thumshirn Reviewed-by: Matias Bjørling Reviewed-by: Daniel Wagner Reviewed-by: Himanshu Madhani Reviewed-by: Hannes Reinecke Signed-off-by: Niklas Cassel Signed-off-by: Christoph Hellwig

nvme: add Metadata Capabilities enumerations

2020-05-27T05:12:40+00:00

The enumerations will be used to expose the namespace metadata format by the target. Suggested-by: Christoph Hellwig Signed-off-by: Israel Rukshin Signed-off-by: Max Gurtovoy Reviewed-by: James Smart Reviewed-by: Martin K. Petersen Signed-off-by: Christoph Hellwig