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Commit 274c0891 authored by Roland Dreier's avatar Roland Dreier
Browse files

[IB] uverbs: Add device-specific ABI version attribute 



Add abi_version attribute to uverbs class devices to allow for
ABI versioning of device-specific interfaces.

Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent eb9d3cd5

drivers/infiniband/core/uverbs_main.c

+11 −0
Original line number Diff line number Diff line
@@ -598,6 +598,15 @@ static ssize_t show_ibdev(struct class_device *class_dev, char *buf) 
}

static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);



static ssize_t show_dev_abi_version(struct class_device *class_dev, char *buf)

{

	struct ib_uverbs_device *dev =

		container_of(class_dev, struct ib_uverbs_device, class_dev);



	return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);

}

static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);



static void ib_uverbs_release_class_dev(struct class_device *class_dev)

{

	struct ib_uverbs_device *dev =
@@ -662,6 +671,8 @@ static void ib_uverbs_add_one(struct ib_device *device) 


	if (class_device_create_file(&uverbs_dev->class_dev, &class_device_attr_ibdev))

		goto err_class;

	if (class_device_create_file(&uverbs_dev->class_dev, &class_device_attr_abi_version))

		goto err_class;



	ib_set_client_data(device, &uverbs_client, uverbs_dev);

drivers/infiniband/hw/mthca/mthca_provider.c

+1 −0
Original line number Diff line number Diff line
@@ -1060,6 +1060,7 @@ int mthca_register_device(struct mthca_dev *dev) 
	strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);

	dev->ib_dev.owner                = THIS_MODULE;



	dev->ib_dev.uverbs_abi_ver	 = MTHCA_UVERBS_ABI_VERSION;

	dev->ib_dev.node_type            = IB_NODE_CA;

	dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;

	dev->ib_dev.dma_device           = &dev->pdev->dev;

drivers/infiniband/hw/mthca/mthca_user.h

+6 −0
Original line number Diff line number Diff line
@@ -37,6 +37,12 @@ 


#include <linux/types.h>



/*

 * Increment this value if any changes that break userspace ABI

 * compatibility are made.

 */

#define MTHCA_UVERBS_ABI_VERSION	1



/*

 * Make sure that all structs defined in this file remain laid out so

 * that they pack the same way on 32-bit and 64-bit architectures (to

include/rdma/ib_verbs.h

+2 −0
Original line number Diff line number Diff line
@@ -951,6 +951,8 @@ struct ib_device { 
		IB_DEV_UNREGISTERED

	}                            reg_state;



	int			     uverbs_abi_ver;



	u8                           node_type;

	u8                           phys_port_cnt;

};