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From: Parav Pandit <parav@mellanox.com>
To: alex.williamson@redhat.com, davem@davemloft.net,
	kvm@vger.kernel.org, netdev@vger.kernel.org
Cc: saeedm@mellanox.com, kwankhede@nvidia.com, leon@kernel.org,
	cohuck@redhat.com, jiri@mellanox.com, linux-rdma@vger.kernel.org,
	Parav Pandit <parav@mellanox.com>
Subject: [PATCH net-next 16/19] net/mlx5: Implement dma ops and params for mediated device
Date: Thu,  7 Nov 2019 10:08:31 -0600
Message-ID: <20191107160834.21087-16-parav@mellanox.com> (raw)
In-Reply-To: <20191107160834.21087-1-parav@mellanox.com>

Implement dma ops wrapper to divert dma ops to its parent PCI device
because Intel IOMMU (and may be other IOMMU) is limited to PCI devices.

Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
---
 .../ethernet/mellanox/mlx5/core/meddev/sf.c   | 151 ++++++++++++++++++
 1 file changed, 151 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/meddev/sf.c b/drivers/net/ethernet/mellanox/mlx5/core/meddev/sf.c
index cfbbb2d32aca..4b0718418bc5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/meddev/sf.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/meddev/sf.c
@@ -207,6 +207,156 @@ u16 mlx5_core_max_sfs(const struct mlx5_core_dev *dev,
 	return mlx5_core_is_sf_supported(dev) ? sf_table->max_sfs : 0;
 }
 
+static void *mlx5_sf_dma_alloc(struct device *dev, size_t size,
+			       dma_addr_t *dma_handle, gfp_t gfp,
+			       unsigned long attrs)
+{
+	return dma_alloc_attrs(dev->parent, size, dma_handle, gfp, attrs);
+}
+
+static void
+mlx5_sf_dma_free(struct device *dev, size_t size,
+		 void *vaddr, dma_addr_t dma_handle,
+		 unsigned long attrs)
+{
+	dma_free_attrs(dev->parent, size, vaddr, dma_handle, attrs);
+}
+
+static int
+mlx5_sf_dma_mmap(struct device *dev, struct vm_area_struct *vma,
+		 void *cpu_addr, dma_addr_t dma_addr, size_t size,
+		 unsigned long attrs)
+{
+	return dma_mmap_attrs(dev->parent, vma, cpu_addr,
+			      dma_addr, size, attrs);
+}
+
+static int
+mlx5_sf_dma_get_sgtable(struct device *dev, struct sg_table *sgt,
+			void *cpu_addr, dma_addr_t dma_addr, size_t size,
+			unsigned long attrs)
+{
+	return dma_get_sgtable_attrs(dev->parent, sgt, cpu_addr,
+				     dma_addr, size, attrs);
+}
+
+static dma_addr_t
+mlx5_sf_dma_map_page(struct device *dev, struct page *page,
+		     unsigned long offset, size_t size,
+		     enum dma_data_direction dir,
+		     unsigned long attrs)
+{
+	return dma_map_page_attrs(dev->parent, page, offset, size, dir, attrs);
+}
+
+static void
+mlx5_sf_dma_unmap_page(struct device *dev, dma_addr_t dma_handle,
+		       size_t size, enum dma_data_direction dir,
+		       unsigned long attrs)
+{
+	dma_unmap_page_attrs(dev->parent, dma_handle, size, dir, attrs);
+}
+
+static int
+mlx5_sf_dma_map_sg(struct device *dev, struct scatterlist *sg,
+		   int nents, enum dma_data_direction dir,
+		   unsigned long attrs)
+{
+	return dma_map_sg_attrs(dev->parent, sg, nents, dir, attrs);
+}
+
+static void
+mlx5_sf_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
+		     enum dma_data_direction dir, unsigned long attrs)
+{
+	dma_unmap_sg_attrs(dev->parent, sg, nents, dir, attrs);
+}
+
+static dma_addr_t
+mlx5_sf_dma_map_resource(struct device *dev, phys_addr_t phys_addr,
+			 size_t size, enum dma_data_direction dir,
+			 unsigned long attrs)
+{
+	return dma_map_resource(dev->parent, phys_addr, size, dir, attrs);
+}
+
+static void
+mlx5_sf_dma_unmap_resource(struct device *dev, dma_addr_t dma_handle,
+			   size_t size, enum dma_data_direction dir,
+			   unsigned long attrs)
+{
+	dma_unmap_resource(dev->parent, dma_handle, size, dir, attrs);
+}
+
+static void
+mlx5_sf_dma_sync_single_for_cpu(struct device *dev,
+				dma_addr_t dma_handle, size_t size,
+				enum dma_data_direction dir)
+{
+	dma_sync_single_for_cpu(dev->parent, dma_handle, size, dir);
+}
+
+static void
+mlx5_sf_dma_sync_single_for_device(struct device *dev,
+				   dma_addr_t dma_handle, size_t size,
+				   enum dma_data_direction dir)
+{
+	dma_sync_single_for_device(dev->parent, dma_handle, size, dir);
+}
+
+static void
+mlx5_sf_dma_sync_sg_for_cpu(struct device *dev,
+			    struct scatterlist *sg, int nents,
+			    enum dma_data_direction dir)
+{
+	dma_sync_sg_for_cpu(dev->parent, sg, nents, dir);
+}
+
+static void
+mlx5_sf_dma_sync_sg_for_device(struct device *dev,
+			       struct scatterlist *sg, int nents,
+			       enum dma_data_direction dir)
+{
+	dma_sync_sg_for_device(dev->parent, sg, nents, dir);
+}
+
+static void
+mlx5_sf_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+		       enum dma_data_direction dir)
+{
+	dma_cache_sync(dev->parent, vaddr, size, dir);
+}
+
+static const struct dma_map_ops mlx5_sf_dma_ops = {
+	.alloc = mlx5_sf_dma_alloc,
+	.free = mlx5_sf_dma_free,
+	.mmap = mlx5_sf_dma_mmap,
+	.get_sgtable = mlx5_sf_dma_get_sgtable,
+	.map_page = mlx5_sf_dma_map_page,
+	.unmap_page = mlx5_sf_dma_unmap_page,
+	.map_sg = mlx5_sf_dma_map_sg,
+	.unmap_sg = mlx5_sf_dma_unmap_sg,
+	.map_resource = mlx5_sf_dma_map_resource,
+	.unmap_resource = mlx5_sf_dma_unmap_resource,
+	.sync_single_for_cpu = mlx5_sf_dma_sync_single_for_cpu,
+	.sync_sg_for_cpu = mlx5_sf_dma_sync_sg_for_cpu,
+	.sync_sg_for_device = mlx5_sf_dma_sync_sg_for_device,
+	.sync_single_for_device = mlx5_sf_dma_sync_single_for_device,
+	.cache_sync = mlx5_sf_dma_cache_sync,
+};
+
+static void
+set_dma_params(struct device *dev, const struct mlx5_core_dev *coredev)
+{
+	struct pci_dev *pdev = coredev->pdev;
+
+	dev->dma_ops = &mlx5_sf_dma_ops;
+	dev->dma_mask = pdev->dev.dma_mask;
+	dev->dma_parms = pdev->dev.dma_parms;
+	dma_set_coherent_mask(dev, pdev->dev.coherent_dma_mask);
+	dma_set_max_seg_size(dev, dma_get_max_seg_size(&pdev->dev));
+}
+
 int mlx5_sf_load(struct mlx5_sf *sf, struct device *device,
 		 const struct mlx5_core_dev *parent_dev)
 {
@@ -231,6 +381,7 @@ int mlx5_sf_load(struct mlx5_sf *sf, struct device *device,
 		err = -ENOMEM;
 		goto remap_err;
 	}
+	set_dma_params(dev->device, parent_dev);
 
 	err = mlx5_mdev_init(dev, MLX5_DEFAULT_PROF);
 	if (err) {
-- 
2.19.2


  parent reply index

Thread overview: 132+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-07 16:04 [PATCH net-next 00/19] Mellanox, mlx5 sub function support Parav Pandit
2019-11-07 16:08 ` [PATCH net-next 01/19] net/mlx5: E-switch, Move devlink port close to eswitch port Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 02/19] net/mlx5: E-Switch, Add SF vport, vport-rep support Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 03/19] net/mlx5: Introduce SF table framework Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 04/19] net/mlx5: Introduce SF life cycle APIs to allocate/free Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 05/19] net/mlx5: E-Switch, Enable/disable SF's vport during SF life cycle Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 06/19] net/mlx5: Add support for mediated devices in switchdev mode Parav Pandit
2019-11-08 10:32     ` Jiri Pirko
2019-11-08 16:03       ` Parav Pandit
2019-11-08 16:22         ` Jiri Pirko
2019-11-08 16:29           ` Parav Pandit
2019-11-08 18:01             ` Jiri Pirko
2019-11-08 18:04             ` Jiri Pirko
2019-11-08 18:21               ` Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 07/19] vfio/mdev: Introduce sha1 based mdev alias Parav Pandit
2019-11-08 11:04     ` Jiri Pirko
2019-11-08 15:59       ` Parav Pandit
2019-11-08 16:28         ` Jiri Pirko
2019-11-08 11:10     ` Cornelia Huck
2019-11-08 16:03       ` Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 08/19] vfio/mdev: Make mdev alias unique among all mdevs Parav Pandit
2019-11-08 10:49     ` Jiri Pirko
2019-11-08 15:13       ` Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 09/19] vfio/mdev: Expose mdev alias in sysfs tree Parav Pandit
2019-11-08 13:22     ` Jiri Pirko
2019-11-08 18:03       ` Alex Williamson
2019-11-08 18:16         ` Jiri Pirko
2019-11-07 16:08   ` [PATCH net-next 10/19] vfio/mdev: Introduce an API mdev_alias Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 11/19] vfio/mdev: Improvise mdev life cycle and parent removal scheme Parav Pandit
2019-11-08 13:01     ` Cornelia Huck
2019-11-08 16:12       ` Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 12/19] devlink: Introduce mdev port flavour Parav Pandit
2019-11-07 20:38     ` Jakub Kicinski
2019-11-07 21:03       ` Parav Pandit
2019-11-08  1:17         ` Jakub Kicinski
2019-11-08  1:44           ` Parav Pandit
2019-11-08  2:20             ` Jakub Kicinski
2019-11-08  2:31               ` Parav Pandit
2019-11-08  9:46                 ` Jiri Pirko
2019-11-08 15:45                   ` Parav Pandit
2019-11-08 16:31                     ` Jiri Pirko
2019-11-08 16:43                       ` Parav Pandit
2019-11-08 18:11                         ` Jiri Pirko
2019-11-08 18:23                           ` Parav Pandit
2019-11-08 18:34                             ` Jiri Pirko
2019-11-08 18:56                               ` Parav Pandit
2019-11-08  9:30               ` Jiri Pirko
2019-11-08 15:41                 ` Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 13/19] net/mlx5: Register SF devlink port Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 14/19] net/mlx5: Share irqs between SFs and parent PCI device Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 15/19] net/mlx5: Add load/unload routines for SF driver binding Parav Pandit
2019-11-08  9:48     ` Jiri Pirko
2019-11-08 11:13       ` Jiri Pirko
2019-11-07 16:08   ` Parav Pandit [this message]
2019-11-07 20:42     ` [PATCH net-next 16/19] net/mlx5: Implement dma ops and params for mediated device Jakub Kicinski
2019-11-07 21:30       ` Parav Pandit
2019-11-08  1:16         ` Jakub Kicinski
2019-11-08  6:37     ` Christoph Hellwig
2019-11-08 15:29       ` Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 17/19] net/mlx5: Add mdev driver to bind to mdev devices Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 18/19] Documentation: net: mlx5: Add mdev usage documentation Parav Pandit
2019-11-07 16:08   ` [PATCH net-next 19/19] mtty: Optionally support mtty alias Parav Pandit
2019-11-08  6:26     ` Leon Romanovsky
2019-11-08 10:45     ` Jiri Pirko
2019-11-08 15:08       ` Parav Pandit
2019-11-08 15:15         ` Jiri Pirko
2019-11-08 13:46     ` Cornelia Huck
2019-11-08 15:10       ` Parav Pandit
2019-11-08 15:28         ` Cornelia Huck
2019-11-08 15:30           ` Parav Pandit
2019-11-08 17:54             ` Alex Williamson
2019-11-08  9:51   ` [PATCH net-next 01/19] net/mlx5: E-switch, Move devlink port close to eswitch port Jiri Pirko
2019-11-08 15:50     ` Parav Pandit
2019-11-07 17:03 ` [PATCH net-next 00/19] Mellanox, mlx5 sub function support Leon Romanovsky
2019-11-07 20:10   ` Parav Pandit
2019-11-08  6:20     ` Leon Romanovsky
2019-11-08 15:01       ` Parav Pandit
2019-11-07 20:32 ` Jakub Kicinski
2019-11-07 20:52   ` Parav Pandit
2019-11-08  1:16     ` Jakub Kicinski
2019-11-08  1:49       ` Parav Pandit
2019-11-08  2:12         ` Jakub Kicinski
2019-11-08 12:12   ` Jiri Pirko
2019-11-08 14:40     ` Jason Gunthorpe
2019-11-08 15:40       ` Parav Pandit
2019-11-08 19:12         ` Jakub Kicinski
2019-11-08 20:12           ` Jason Gunthorpe
2019-11-08 20:20             ` Parav Pandit
2019-11-08 20:32               ` Jason Gunthorpe
2019-11-08 20:52                 ` gregkh
2019-11-08 20:34             ` Alex Williamson
2019-11-08 21:05               ` Jason Gunthorpe
2019-11-08 21:19                 ` gregkh
2019-11-08 21:52                 ` Alex Williamson
2019-11-08 22:48                   ` Parav Pandit
2019-11-09  0:57                     ` Jason Gunthorpe
2019-11-09 17:41                       ` Jakub Kicinski
2019-11-10 19:04                         ` Jason Gunthorpe
2019-11-10 19:48                       ` Parav Pandit
2019-11-11 14:17                         ` Jiri Pirko
2019-11-11 14:58                           ` Parav Pandit
2019-11-11 15:06                             ` Jiri Pirko
2019-11-19  4:51                               ` Parav Pandit
2019-11-09  0:12                   ` Jason Gunthorpe
2019-11-09  0:45                     ` Parav Pandit
2019-11-11  2:19                 ` Jason Wang
2019-11-08 21:45             ` Jakub Kicinski
2019-11-09  0:44               ` Jason Gunthorpe
2019-11-09  8:46                 ` gregkh
2019-11-09 11:18                   ` Jiri Pirko
2019-11-09 17:28                     ` Jakub Kicinski
2019-11-10  9:16                     ` gregkh
2019-11-09 17:27                 ` Jakub Kicinski
2019-11-10  9:18                   ` gregkh
2019-11-11  3:46                     ` Jakub Kicinski
2019-11-11  5:18                       ` Parav Pandit
2019-11-11 13:30                       ` Jiri Pirko
2019-11-11 14:14                         ` gregkh
2019-11-11 14:37                           ` Jiri Pirko
2019-11-10 19:37                   ` Jason Gunthorpe
2019-11-11  3:57                     ` Jakub Kicinski
2019-11-08 16:06     ` Parav Pandit
2019-11-08 19:06     ` Jakub Kicinski
2019-11-08 19:34       ` Parav Pandit
2019-11-08 19:48         ` Jakub Kicinski
2019-11-08 19:41       ` Jiri Pirko
2019-11-08 20:40         ` Parav Pandit
2019-11-08 21:21         ` Jakub Kicinski
2019-11-08 21:39           ` Jiri Pirko
2019-11-08 21:51             ` Jakub Kicinski
2019-11-08 22:21               ` Jiri Pirko
2019-11-07 23:57 ` David Miller

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