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nvme: Add PCI transport type

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Define the transport type NVMF_TRTYPE_PCI for PCI endpoint targets.
This transport type is defined using the value 0 which is reserved in
the NVMe base specifications v2.1 (Figure 294). Given that struct
nvmet_port are zeroed out on creation, to avoid having this transsport
type becoming the new default, nvmet_referral_make() and
nvmet_ports_make() are modified to initialize a port discovery address
transport type field (disc_addr.trtype) to NVMF_TRTYPE_MAX.

Any port using this transport type is also skipped and not reported in
the discovery log page (nvmet_execute_disc_get_log_page()).

The helper function nvmet_is_pci_ctrl() is also introduced to check if
a target controller uses the PCI transport.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Rick Wertenbroek <rick.wertenbroek@gmail.com>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Damien Le Moal
2025-01-04 13:59:39 +09:00
committed by Keith Busch
parent 35c593e530
commit 200adac758
4 changed files with 13 additions and 0 deletions
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5
drivers/nvme/target/nvmet.h
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@@ -693,6 +693,11 @@ static inline bool nvmet_is_disc_subsys(struct nvmet_subsys *subsys)
return subsys->type != NVME_NQN_NVME;
}
static inline bool nvmet_is_pci_ctrl(struct nvmet_ctrl *ctrl)
{
return ctrl->port->disc_addr.trtype == NVMF_TRTYPE_PCI;
}
#ifdef CONFIG_NVME_TARGET_PASSTHRU
void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys);
int nvmet_passthru_ctrl_enable(struct nvmet_subsys *subsys);