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From: Thomas Monjalon <thomas@monjalon.net>
To: Shahaf Shuler <shahafs@mellanox.com>
Cc: dev@dpdk.org, anatoly.burakov@intel.com, yskoh@mellanox.com,
	ferruh.yigit@intel.com, nhorman@tuxdriver.com,
	gaetan.rivet@6wind.com
Subject: Re: [dpdk-dev] [PATCH v4 0/6] introduce DMA memory mapping for external memory
Date: Sat, 30 Mar 2019 15:40:34 +0100	[thread overview]
Message-ID: <29901841.I4p9NahPEI@xps> (raw)
In-Reply-To: <cover.1552206210.git.shahafs@mellanox.com>

10/03/2019 09:27, Shahaf Shuler:
> The DPDK APIs expose 3 different modes to work with memory used for DMA:
> 
> 1. Use the DPDK owned memory (backed by the DPDK provided hugepages).
> This memory is allocated by the DPDK libraries, included in the DPDK
> memory system (memseg lists) and automatically DMA mapped by the DPDK
> layers.
> 
> 2. Use memory allocated by the user and register to the DPDK memory
> systems. Upon registration of memory, the DPDK layers will DMA map it
> to all needed devices. After registration, allocation of this memory
> will be done with rte_*malloc APIs.
> 
> 3. Use memory allocated by the user and not registered to the DPDK memory
> system. This is for users who wants to have tight control on this
> memory (e.g. avoid the rte_malloc header).
> The user should create a memory, register it through rte_extmem_register
> API, and call DMA map function in order to register such memory to
> the different devices.
> 
> The scope of the patch focus on #3 above.
> 
> Currently the only way to map external memory is through VFIO
> (rte_vfio_dma_map). While VFIO is common, there are other vendors
> which use different ways to map memory (e.g. Mellanox and NXP).
> 
> The work in this patch moves the DMA mapping to vendor agnostic APIs.
> Device level DMA map and unmap APIs were added. Implementation of those
> APIs was done currently only for PCI devices.
> 
> For PCI bus devices, the pci driver can expose its own map and unmap
> functions to be used for the mapping. In case the driver doesn't provide
> any, the memory will be mapped, if possible, to IOMMU through VFIO APIs.
> 
> Application usage with those APIs is quite simple:
> * allocate memory
> * call rte_extmem_register on the memory chunk.
> * take a device, and query its rte_device.
> * call the device specific mapping function for this device.
> 
> Future work will deprecate the rte_vfio_dma_map and rte_vfio_dma_unmap
> APIs, leaving the rte device APIs as the preferred option for the user.
> 
> Shahaf Shuler (6):
>   vfio: allow DMA map of memory for the default vfio fd
>   vfio: don't fail to DMA map if memory is already mapped
>   bus: introduce device level DMA memory mapping
>   net/mlx5: refactor external memory registration
>   net/mlx5: support PCI device DMA map and unmap
>   doc: deprecation notice for VFIO DMA map APIs

Applied, thanks

  parent reply	other threads:[~2019-03-30 14:40 UTC|newest]

Thread overview: 79+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-13  9:10 [dpdk-dev] [PATCH " Shahaf Shuler
2019-02-13  9:10 ` [dpdk-dev] [PATCH 1/6] vfio: allow DMA map of memory for the default vfio fd Shahaf Shuler
2019-02-13  9:45   ` Gaëtan Rivet
2019-02-13 11:38     ` Gaëtan Rivet
2019-02-13 15:23     ` Shahaf Shuler
2019-02-13 14:41   ` Burakov, Anatoly
2019-02-13  9:10 ` [dpdk-dev] [PATCH 2/6] vfio: don't fail to DMA map if memory is already mapped Shahaf Shuler
2019-02-13  9:58   ` Gaëtan Rivet
2019-02-13 19:52     ` Shahaf Shuler
2019-02-13  9:10 ` [dpdk-dev] [PATCH 3/6] bus: introduce DMA memory mapping for external memory Shahaf Shuler
2019-02-13 11:17   ` Gaëtan Rivet
2019-02-13 19:07     ` Shahaf Shuler
2019-02-14 14:00       ` Gaëtan Rivet
2019-02-17  6:23         ` Shahaf Shuler
2019-02-13  9:10 ` [dpdk-dev] [PATCH 4/6] net/mlx5: refactor external memory registration Shahaf Shuler
2019-02-13  9:10 ` [dpdk-dev] [PATCH 5/6] net/mlx5: support PCI device DMA map and unmap Shahaf Shuler
2019-02-13 11:35   ` Gaëtan Rivet
2019-02-13 11:44     ` Gaëtan Rivet
2019-02-13 19:11       ` Shahaf Shuler
2019-02-14 10:21         ` Gaëtan Rivet
2019-02-21  9:21           ` Shahaf Shuler
2019-02-13  9:10 ` [dpdk-dev] [PATCH 6/6] doc: deprecate VFIO DMA map APIs Shahaf Shuler
2019-02-13 11:43 ` [dpdk-dev] [PATCH 0/6] introduce DMA memory mapping for external memory Alejandro Lucero
2019-02-13 19:24   ` Shahaf Shuler
2019-02-14 10:19     ` Burakov, Anatoly
2019-02-14 13:28       ` Shahaf Shuler
2019-02-14 16:19         ` Burakov, Anatoly
2019-02-17  6:18           ` Shahaf Shuler
2019-02-18 12:21             ` Burakov, Anatoly
2019-02-14 12:22     ` Alejandro Lucero
2019-02-14 12:27       ` Alejandro Lucero
2019-02-14 13:41       ` Shahaf Shuler
2019-02-14 16:43         ` Burakov, Anatoly
2019-02-21 14:50 ` [dpdk-dev] [PATCH v2 " Shahaf Shuler
2019-03-05 13:59   ` [dpdk-dev] [PATCH v3 " Shahaf Shuler
2019-03-10  8:27     ` [dpdk-dev] [PATCH v4 " Shahaf Shuler
2019-03-10  8:27       ` [dpdk-dev] [PATCH v4 1/6] vfio: allow DMA map of memory for the default vfio fd Shahaf Shuler
2019-03-30  0:23         ` Thomas Monjalon
2019-03-30  0:23           ` Thomas Monjalon
2019-03-30 14:29           ` Thomas Monjalon
2019-03-30 14:29             ` Thomas Monjalon
2019-03-10  8:27       ` [dpdk-dev] [PATCH v4 2/6] vfio: don't fail to DMA map if memory is already mapped Shahaf Shuler
2019-03-10  8:28       ` [dpdk-dev] [PATCH v4 3/6] bus: introduce device level DMA memory mapping Shahaf Shuler
2019-03-11 10:19         ` Burakov, Anatoly
2019-03-13  9:56         ` Thomas Monjalon
2019-03-13 11:12           ` Shahaf Shuler
2019-03-13 11:19             ` Thomas Monjalon
2019-03-13 11:47               ` Burakov, Anatoly
2019-03-30 14:36             ` Thomas Monjalon
2019-03-30 14:36               ` Thomas Monjalon
2019-03-10  8:28       ` [dpdk-dev] [PATCH v4 4/6] net/mlx5: refactor external memory registration Shahaf Shuler
2019-03-10  8:28       ` [dpdk-dev] [PATCH v4 5/6] net/mlx5: support PCI device DMA map and unmap Shahaf Shuler
2019-03-10  8:28       ` [dpdk-dev] [PATCH v4 6/6] doc: deprecation notice for VFIO DMA map APIs Shahaf Shuler
2019-03-11 10:20         ` Burakov, Anatoly
2019-03-11 17:35           ` Rami Rosen
2019-10-01 15:20         ` David Marchand
2019-10-02  4:53           ` Shahaf Shuler
2019-10-02  7:51             ` David Marchand
2019-03-11  9:27       ` [dpdk-dev] [PATCH v4 0/6] introduce DMA memory mapping for external memory Gaëtan Rivet
2019-03-30 14:40       ` Thomas Monjalon [this message]
2019-03-30 14:40         ` Thomas Monjalon
2019-03-05 13:59   ` [dpdk-dev] [PATCH v3 1/6] vfio: allow DMA map of memory for the default vfio fd Shahaf Shuler
2019-03-05 13:59   ` [dpdk-dev] [PATCH v3 2/6] vfio: don't fail to DMA map if memory is already mapped Shahaf Shuler
2019-03-05 13:59   ` [dpdk-dev] [PATCH v3 3/6] bus: introduce device level DMA memory mapping Shahaf Shuler
2019-03-05 16:35     ` Burakov, Anatoly
2019-03-05 13:59   ` [dpdk-dev] [PATCH v3 4/6] net/mlx5: refactor external memory registration Shahaf Shuler
2019-03-05 13:59   ` [dpdk-dev] [PATCH v3 5/6] net/mlx5: support PCI device DMA map and unmap Shahaf Shuler
2019-03-05 13:59   ` [dpdk-dev] [PATCH v3 6/6] doc: deprecation notice for VFIO DMA map APIs Shahaf Shuler
2019-02-21 14:50 ` [dpdk-dev] [PATCH v2 1/6] vfio: allow DMA map of memory for the default vfio fd Shahaf Shuler
2019-02-28 11:56   ` Burakov, Anatoly
2019-02-21 14:50 ` [dpdk-dev] [PATCH v2 2/6] vfio: don't fail to DMA map if memory is already mapped Shahaf Shuler
2019-02-28 11:58   ` Burakov, Anatoly
2019-02-21 14:50 ` [dpdk-dev] [PATCH v2 3/6] bus: introduce device level DMA memory mapping Shahaf Shuler
2019-02-28 12:14   ` Burakov, Anatoly
2019-02-28 14:41     ` Burakov, Anatoly
2019-02-21 14:50 ` [dpdk-dev] [PATCH v2 4/6] net/mlx5: refactor external memory registration Shahaf Shuler
2019-02-21 14:50 ` [dpdk-dev] [PATCH v2 5/6] net/mlx5: support PCI device DMA map and unmap Shahaf Shuler
2019-02-21 14:50 ` [dpdk-dev] [PATCH v2 6/6] doc: deprecate VFIO DMA map APIs Shahaf Shuler
2019-02-21 15:50   ` David Marchand

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