From: Sagi Grimberg <sagi@grimberg.me>
To: Logan Gunthorpe <logang@deltatee.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-rdma@vger.kernel.org,
linux-nvdimm@lists.01.org, linux-block@vger.kernel.org
Cc: "Jens Axboe" <axboe@kernel.dk>,
"Christian König" <christian.koenig@amd.com>,
"Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
"Steve Wise" <swise@opengridcomputing.com>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Jason Gunthorpe" <jgg@mellanox.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Max Gurtovoy" <maxg@mellanox.com>,
"Christoph Hellwig" <hch@lst.de>
Subject: Re: [PATCH v9 13/13] nvmet: Optionally use PCI P2P memory
Date: Thu, 4 Oct 2018 15:20:55 -0700 [thread overview]
Message-ID: <a3af4bda-0b73-c964-c7d6-5d59f0710768@grimberg.me> (raw)
In-Reply-To: <20181004212747.6301-14-logang@deltatee.com>
> diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
> index e7b7406c4e22..4333e2c5b4f5 100644
> --- a/drivers/nvme/target/nvmet.h
> +++ b/drivers/nvme/target/nvmet.h
> @@ -26,6 +26,7 @@
> #include <linux/configfs.h>
> #include <linux/rcupdate.h>
> #include <linux/blkdev.h>
> +#include <linux/radix-tree.h>
>
> #define NVMET_ASYNC_EVENTS 4
> #define NVMET_ERROR_LOG_SLOTS 128
> @@ -77,6 +78,9 @@ struct nvmet_ns {
> struct completion disable_done;
> mempool_t *bvec_pool;
> struct kmem_cache *bvec_cache;
> +
> + int use_p2pmem;
> + struct pci_dev *p2p_dev;
> };
>
> static inline struct nvmet_ns *to_nvmet_ns(struct config_item *item)
> @@ -84,6 +88,11 @@ static inline struct nvmet_ns *to_nvmet_ns(struct config_item *item)
> return container_of(to_config_group(item), struct nvmet_ns, group);
> }
>
> +static inline struct device *nvmet_ns_dev(struct nvmet_ns *ns)
> +{
> + return disk_to_dev(ns->bdev->bd_disk);
> +}
This needs to handle non bdev namespaces.
> +
> struct nvmet_cq {
> u16 qid;
> u16 size;
> @@ -184,6 +193,9 @@ struct nvmet_ctrl {
>
> char subsysnqn[NVMF_NQN_FIELD_LEN];
> char hostnqn[NVMF_NQN_FIELD_LEN];
> +
> + struct device *p2p_client;
> + struct radix_tree_root p2p_ns_map;
> };
>
> struct nvmet_subsys {
> @@ -294,6 +306,9 @@ struct nvmet_req {
>
> void (*execute)(struct nvmet_req *req);
> const struct nvmet_fabrics_ops *ops;
> +
> + struct pci_dev *p2p_dev;
> + struct device *p2p_client;
> };
>
> extern struct workqueue_struct *buffered_io_wq;
> diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c
> index 9e091e78a2f0..3f7971d3706d 100644
> --- a/drivers/nvme/target/rdma.c
> +++ b/drivers/nvme/target/rdma.c
> @@ -749,6 +749,8 @@ static void nvmet_rdma_handle_command(struct nvmet_rdma_queue *queue,
> cmd->send_sge.addr, cmd->send_sge.length,
> DMA_TO_DEVICE);
>
> + cmd->req.p2p_client = &queue->dev->device->dev;
> +
> if (!nvmet_req_init(&cmd->req, &queue->nvme_cq,
> &queue->nvme_sq, &nvmet_rdma_ops))
> return;
And this?
--
diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index ef286b72d958..3d12f5f4568d 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -2280,6 +2280,7 @@ nvmet_fc_handle_fcp_rqst(struct nvmet_fc_tgtport
*tgtport,
fod->req.cmd = &fod->cmdiubuf.sqe;
fod->req.rsp = &fod->rspiubuf.cqe;
fod->req.port = tgtport->pe->port;
+ fod->req.p2p_client = tgtport->dev;
/* clear any response payload */
memset(&fod->rspiubuf, 0, sizeof(fod->rspiubuf));
--
Other than that this looks good!
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next prev parent reply other threads:[~2018-10-04 22:21 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-04 21:27 [PATCH v9 00/13] Copy Offload in NVMe Fabrics with P2P PCI Memory Logan Gunthorpe
2018-10-04 21:27 ` [PATCH v9 01/13] PCI/P2PDMA: Support peer-to-peer memory Logan Gunthorpe
2018-10-04 21:27 ` [PATCH v9 02/13] PCI/P2PDMA: Add sysfs group to display p2pmem stats Logan Gunthorpe
2018-10-05 7:08 ` Christoph Hellwig
2018-10-04 21:27 ` [PATCH v9 03/13] PCI/P2PDMA: Add PCI p2pmem DMA mappings to adjust the bus offset Logan Gunthorpe
2018-10-05 7:08 ` Christoph Hellwig
2018-10-04 21:27 ` [PATCH v9 04/13] PCI/P2PDMA: Introduce configfs/sysfs enable attribute helpers Logan Gunthorpe
2018-10-05 7:08 ` Christoph Hellwig
2018-10-04 21:27 ` [PATCH v9 05/13] docs-rst: Add a new directory for PCI documentation Logan Gunthorpe
2018-10-04 21:27 ` [PATCH v9 06/13] PCI/P2PDMA: Add P2P DMA driver writer's documentation Logan Gunthorpe
2018-10-04 21:27 ` [PATCH v9 07/13] block: Add PCI P2P flag for request queue and check support for requests Logan Gunthorpe
2018-10-05 7:09 ` Christoph Hellwig
2018-10-06 1:16 ` Jens Axboe
2018-10-10 19:59 ` Bjorn Helgaas
2018-10-10 20:00 ` Jens Axboe
2018-10-04 21:27 ` [PATCH v9 08/13] IB/core: Ensure we map P2P memory correctly in rdma_rw_ctx_[init|destroy]() Logan Gunthorpe
2018-10-05 7:09 ` Christoph Hellwig
2018-10-04 21:27 ` [PATCH v9 09/13] nvme-pci: Use PCI p2pmem subsystem to manage the CMB Logan Gunthorpe
2018-10-05 7:09 ` Christoph Hellwig
2018-10-04 21:27 ` [PATCH v9 10/13] nvme-pci: Add support for P2P memory in requests Logan Gunthorpe
2018-10-04 21:27 ` [PATCH v9 11/13] nvme-pci: Add a quirk for a pseudo CMB Logan Gunthorpe
2018-10-05 7:10 ` Christoph Hellwig
2018-10-05 15:39 ` Logan Gunthorpe
2018-10-04 21:27 ` [PATCH v9 12/13] nvmet: Introduce helper functions to allocate and free request SGLs Logan Gunthorpe
2018-10-05 7:11 ` Christoph Hellwig
2018-10-04 21:27 ` [PATCH v9 13/13] nvmet: Optionally use PCI P2P memory Logan Gunthorpe
2018-10-04 22:20 ` Sagi Grimberg [this message]
2018-10-04 22:29 ` Logan Gunthorpe
2018-10-05 7:07 ` Christoph Hellwig
2018-10-05 7:34 ` Sagi Grimberg
2018-10-05 15:42 ` Logan Gunthorpe
2018-10-10 20:19 ` [PATCH v9 00/13] Copy Offload in NVMe Fabrics with P2P PCI Memory Bjorn Helgaas
2018-10-10 23:03 ` Logan Gunthorpe
2018-10-11 3:18 ` Bjorn Helgaas
2018-10-11 15:38 ` Logan Gunthorpe
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