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IB/mlx4_ib: Disassociate support

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Implements the IB core disassociate_ucontext API. The driver detaches the HW
resources for a given user context to prevent a dependency between application
termination and device disconnecting. This is done by managing the VMAs that
were mapped to the HW bars such as door bell and blueflame. When need to detach
remap them to an arbitrary kernel page returned by the zap API.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Yishai Hadas
2015-08-13 18:32:06 +03:00
committed by Doug Ledford
parent 036b106357
commit ae184ddeca
2 changed files with 150 additions and 2 deletions
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13
drivers/infiniband/hw/mlx4/mlx4_ib.h
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@ -70,11 +70,24 @@ extern int mlx4_ib_sm_guid_assign;
#define MLX4_IB_UC_STEER_QPN_ALIGN 1
#define MLX4_IB_UC_MAX_NUM_QPS 256
enum hw_bar_type {
HW_BAR_BF,
HW_BAR_DB,
HW_BAR_CLOCK,
HW_BAR_COUNT
};
struct mlx4_ib_vma_private_data {
struct vm_area_struct *vma;
};
struct mlx4_ib_ucontext {
struct ib_ucontext ibucontext;
struct mlx4_uar uar;
struct list_head db_page_list;
struct mutex db_page_mutex;
struct mlx4_ib_vma_private_data hw_bar_info[HW_BAR_COUNT];
};
struct mlx4_ib_pd {