Christoph Hellwig 4033f35d17 nvme-pci: use dma memory for the host memory buffer descriptors ... The NVMe 1.3 specification says in section 5.21.1.13: "After a successful completion of a Set Features enabling the host memory buffer, the host shall not write to the associated host memory region, buffer size, or descriptor list until the host memory buffer has been disabled." While this doesn't state that the descriptor list must remain accessible to the device it certainly implies it must remaing readable by the device. So switch to a dma coherent allocation for the descriptor list just to be safe - it's not like the cost for it matters compared to the actual memory buffers. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Fixes: 87ad72a59a ("nvme-pci: implement host memory buffer support")		2017-08-30 14:46:16 +02:00
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host	nvme-pci: use dma memory for the host memory buffer descriptors	2017-08-30 14:46:16 +02:00
target	nvmet-fc: eliminate incorrect static markers on local variables	2017-08-17 09:35:08 +02:00
Kconfig	nvmet: add a generic NVMe target	2016-07-05 11:30:33 -06:00
Makefile	nvmet: add a generic NVMe target	2016-07-05 11:30:33 -06:00