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IB/mlx5: Extend caps stage to handle VAR capabilities

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Extend caps stage to handle VAR capabilities.

Link: https://lore.kernel.org/r/20191212110928.334995-4-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Yishai Hadas 2019-12-12 13:09:26 +02:00 committed by Jason Gunthorpe
parent aef5570e23
commit f164be8c03
2 changed files with 48 additions and 2 deletions
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40
drivers/infiniband/hw/mlx5/main.c
View File

@ -6335,6 +6335,35 @@ static const struct ib_device_ops mlx5_ib_dev_dm_ops = {
.reg_dm_mr = mlx5_ib_reg_dm_mr,
};
static int mlx5_ib_init_var_table(struct mlx5_ib_dev *dev)
{
struct mlx5_core_dev *mdev = dev->mdev;
struct mlx5_var_table *var_table = &dev->var_table;
u8 log_doorbell_bar_size;
u8 log_doorbell_stride;
u64 bar_size;
log_doorbell_bar_size = MLX5_CAP_DEV_VDPA_EMULATION(mdev,
log_doorbell_bar_size);
log_doorbell_stride = MLX5_CAP_DEV_VDPA_EMULATION(mdev,
log_doorbell_stride);
var_table->hw_start_addr = dev->mdev->bar_addr +
MLX5_CAP64_DEV_VDPA_EMULATION(mdev,
doorbell_bar_offset);
bar_size = (1ULL << log_doorbell_bar_size) * 4096;
var_table->stride_size = 1ULL << log_doorbell_stride;
var_table->num_var_hw_entries = bar_size / var_table->stride_size;
mutex_init(&var_table->bitmap_lock);
var_table->bitmap = bitmap_zalloc(var_table->num_var_hw_entries,
GFP_KERNEL);
return (var_table->bitmap) ? 0 : -ENOMEM;
}
static void mlx5_ib_stage_caps_cleanup(struct mlx5_ib_dev *dev)
{
bitmap_free(dev->var_table.bitmap);
}
static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
{
struct mlx5_core_dev *mdev = dev->mdev;
@ -6422,6 +6451,13 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
MLX5_CAP_GEN(dev->mdev, disable_local_lb_mc)))
mutex_init(&dev->lb.mutex);
if (MLX5_CAP_GEN_64(dev->mdev, general_obj_types) &
MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q) {
err = mlx5_ib_init_var_table(dev);
if (err)
return err;
}
dev->ib_dev.use_cq_dim = true;
return 0;
@ -6772,7 +6808,7 @@ static const struct mlx5_ib_profile pf_profile = {
mlx5_ib_stage_flow_db_cleanup),
STAGE_CREATE(MLX5_IB_STAGE_CAPS,
mlx5_ib_stage_caps_init,
NULL),
mlx5_ib_stage_caps_cleanup),
STAGE_CREATE(MLX5_IB_STAGE_NON_DEFAULT_CB,
mlx5_ib_stage_non_default_cb,
NULL),
@ -6829,7 +6865,7 @@ const struct mlx5_ib_profile raw_eth_profile = {
mlx5_ib_stage_flow_db_cleanup),
STAGE_CREATE(MLX5_IB_STAGE_CAPS,
mlx5_ib_stage_caps_init,
NULL),
mlx5_ib_stage_caps_cleanup),
STAGE_CREATE(MLX5_IB_STAGE_NON_DEFAULT_CB,
mlx5_ib_stage_raw_eth_non_default_cb,
NULL),

10
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -959,6 +959,15 @@ struct mlx5_devx_event_table {
struct xarray event_xa;
};
struct mlx5_var_table {
/* serialize updating the bitmap */
struct mutex bitmap_lock;
unsigned long *bitmap;
u64 hw_start_addr;
u32 stride_size;
u64 num_var_hw_entries;
};
struct mlx5_ib_dev {
struct ib_device ib_dev;
struct mlx5_core_dev *mdev;
@ -1013,6 +1022,7 @@ struct mlx5_ib_dev {
struct mlx5_srq_table srq_table;
struct mlx5_async_ctx async_ctx;
struct mlx5_devx_event_table devx_event_table;
struct mlx5_var_table var_table;
struct xarray sig_mrs;
};