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Commit 0957c29f authored by Bart Van Assche's avatar Bart Van Assche Committed by Doug Ledford
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IB/core: Restore I/O MMU, s390 and powerpc support 



Avoid that the following error message is reported on the console
while loading an RDMA driver with I/O MMU support enabled:

DMAR: Allocating domain for mlx5_0 failed

Ensure that DMA mapping operations that use to_pci_dev() to
access to struct pci_dev see the correct PCI device. E.g. the s390
and powerpc DMA mapping operations use to_pci_dev() even with I/O
MMU support disabled.

This patch preserves the following changes of the DMA mapping updates
patch series:
- Introduction of dma_virt_ops.
- Removal of ib_device.dma_ops.
- Removal of struct ib_dma_mapping_ops.
- Removal of an if-statement from each ib_dma_*() operation.
- IB HW drivers no longer set dma_device directly.

Reported-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Reported-by: default avatarParav Pandit <parav@mellanox.com>
Fixes: commit 99db9494 ("IB/core: Remove ib_device.dma_device")
Signed-off-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: default avatar <parav@mellanox.com>
Tested-by: default avatar <parav@mellanox.com>
Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent a1c5dd13

drivers/infiniband/core/device.c

+20 −6
Original line number Diff line number Diff line
@@ -336,12 +336,26 @@ int ib_register_device(struct ib_device *device, 
	struct device *parent = device->dev.parent;



	WARN_ON_ONCE(!parent);

	if (!device->dev.dma_ops)

		device->dev.dma_ops = parent->dma_ops;

	WARN_ON_ONCE(device->dma_device);

	if (device->dev.dma_ops) {

		/*

		 * The caller provided custom DMA operations. Copy the

		 * DMA-related fields that are used by e.g. dma_alloc_coherent()

		 * into device->dev.

		 */

		device->dma_device = &device->dev;

		if (!device->dev.dma_mask)

			device->dev.dma_mask = parent->dma_mask;

		if (!device->dev.coherent_dma_mask)

		device->dev.coherent_dma_mask = parent->coherent_dma_mask;

			device->dev.coherent_dma_mask =

				parent->coherent_dma_mask;

	} else {

		/*

		 * The caller did not provide custom DMA operations. Use the

		 * DMA mapping operations of the parent device.

		 */

		device->dma_device = parent;

	}



	mutex_lock(&device_mutex);

include/rdma/ib_verbs.h

+17 −13
Original line number Diff line number Diff line
@@ -1863,6 +1863,9 @@ struct ib_port_immutable { 
};



struct ib_device {

	/* Do not access @dma_device directly from ULP nor from HW drivers. */

	struct device                *dma_device;



	char                          name[IB_DEVICE_NAME_MAX];



	struct list_head              event_handler_list;
@@ -3007,7 +3010,7 @@ static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt) 
 */

static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)

{

	return dma_mapping_error(&dev->dev, dma_addr);

	return dma_mapping_error(dev->dma_device, dma_addr);

}



/**
@@ -3021,7 +3024,7 @@ static inline u64 ib_dma_map_single(struct ib_device *dev, 
				    void *cpu_addr, size_t size,

				    enum dma_data_direction direction)

{

	return dma_map_single(&dev->dev, cpu_addr, size, direction);

	return dma_map_single(dev->dma_device, cpu_addr, size, direction);

}



/**
@@ -3035,7 +3038,7 @@ static inline void ib_dma_unmap_single(struct ib_device *dev, 
				       u64 addr, size_t size,

				       enum dma_data_direction direction)

{

	dma_unmap_single(&dev->dev, addr, size, direction);

	dma_unmap_single(dev->dma_device, addr, size, direction);

}



/**
@@ -3052,7 +3055,7 @@ static inline u64 ib_dma_map_page(struct ib_device *dev, 
				  size_t size,

					 enum dma_data_direction direction)

{

	return dma_map_page(&dev->dev, page, offset, size, direction);

	return dma_map_page(dev->dma_device, page, offset, size, direction);

}



/**
@@ -3066,7 +3069,7 @@ static inline void ib_dma_unmap_page(struct ib_device *dev, 
				     u64 addr, size_t size,

				     enum dma_data_direction direction)

{

	dma_unmap_page(&dev->dev, addr, size, direction);

	dma_unmap_page(dev->dma_device, addr, size, direction);

}



/**
@@ -3080,7 +3083,7 @@ static inline int ib_dma_map_sg(struct ib_device *dev, 
				struct scatterlist *sg, int nents,

				enum dma_data_direction direction)

{

	return dma_map_sg(&dev->dev, sg, nents, direction);

	return dma_map_sg(dev->dma_device, sg, nents, direction);

}



/**
@@ -3094,7 +3097,7 @@ static inline void ib_dma_unmap_sg(struct ib_device *dev, 
				   struct scatterlist *sg, int nents,

				   enum dma_data_direction direction)

{

	dma_unmap_sg(&dev->dev, sg, nents, direction);

	dma_unmap_sg(dev->dma_device, sg, nents, direction);

}



static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
@@ -3102,7 +3105,8 @@ static inline int ib_dma_map_sg_attrs(struct ib_device *dev, 
				      enum dma_data_direction direction,

				      unsigned long dma_attrs)

{

	return dma_map_sg_attrs(&dev->dev, sg, nents, direction, dma_attrs);

	return dma_map_sg_attrs(dev->dma_device, sg, nents, direction,

				dma_attrs);

}



static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
@@ -3110,7 +3114,7 @@ static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev, 
					 enum dma_data_direction direction,

					 unsigned long dma_attrs)

{

	dma_unmap_sg_attrs(&dev->dev, sg, nents, direction, dma_attrs);

	dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, dma_attrs);

}

/**

 * ib_sg_dma_address - Return the DMA address from a scatter/gather entry
@@ -3152,7 +3156,7 @@ static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev, 
					      size_t size,

					      enum dma_data_direction dir)

{

	dma_sync_single_for_cpu(&dev->dev, addr, size, dir);

	dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);

}



/**
@@ -3167,7 +3171,7 @@ static inline void ib_dma_sync_single_for_device(struct ib_device *dev, 
						 size_t size,

						 enum dma_data_direction dir)

{

	dma_sync_single_for_device(&dev->dev, addr, size, dir);

	dma_sync_single_for_device(dev->dma_device, addr, size, dir);

}



/**
@@ -3182,7 +3186,7 @@ static inline void *ib_dma_alloc_coherent(struct ib_device *dev, 
					   dma_addr_t *dma_handle,

					   gfp_t flag)

{

	return dma_alloc_coherent(&dev->dev, size, dma_handle, flag);

	return dma_alloc_coherent(dev->dma_device, size, dma_handle, flag);

}



/**
@@ -3196,7 +3200,7 @@ static inline void ib_dma_free_coherent(struct ib_device *dev, 
					size_t size, void *cpu_addr,

					dma_addr_t dma_handle)

{

	dma_free_coherent(&dev->dev, size, cpu_addr, dma_handle);

	dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle);

}



/**