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author | Matan Barak <matanb@mellanox.com> | 2015-12-15 20:30:12 +0200 |
---|---|---|
committer | Doug Ledford <dledford@redhat.com> | 2015-12-23 23:25:59 -0500 |
commit | b368d7cb8ceb77f481b066bd8be5fada82da7301 (patch) | |
tree | dcbb13dfff86700faf16307623573f8989e43fe6 /drivers | |
parent | 7c60bcbb68122b39fe3e92143abce01be75f3fa6 (diff) | |
download | op-kernel-dev-b368d7cb8ceb77f481b066bd8be5fada82da7301.zip op-kernel-dev-b368d7cb8ceb77f481b066bd8be5fada82da7301.tar.gz |
IB/mlx5: Add hca_core_clock_offset to udata in init_ucontext
Pass hca_core_clock_offset to user-space is mandatory in order to
let the user-space read the free-running clock register from the
right offset in the memory mapped page.
Passing this value is done by changing the vendor's command
and response of init_ucontext to be in extensible form.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 37 | ||||
-rw-r--r-- | drivers/infiniband/hw/mlx5/mlx5_ib.h | 3 | ||||
-rw-r--r-- | drivers/infiniband/hw/mlx5/user.h | 12 |
3 files changed, 42 insertions, 10 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 2d7fac5..a3ae9cc 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -795,8 +795,8 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, struct ib_udata *udata) { struct mlx5_ib_dev *dev = to_mdev(ibdev); - struct mlx5_ib_alloc_ucontext_req_v2 req; - struct mlx5_ib_alloc_ucontext_resp resp; + struct mlx5_ib_alloc_ucontext_req_v2 req = {}; + struct mlx5_ib_alloc_ucontext_resp resp = {}; struct mlx5_ib_ucontext *context; struct mlx5_uuar_info *uuari; struct mlx5_uar *uars; @@ -811,20 +811,19 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, if (!dev->ib_active) return ERR_PTR(-EAGAIN); - memset(&req, 0, sizeof(req)); reqlen = udata->inlen - sizeof(struct ib_uverbs_cmd_hdr); if (reqlen == sizeof(struct mlx5_ib_alloc_ucontext_req)) ver = 0; - else if (reqlen == sizeof(struct mlx5_ib_alloc_ucontext_req_v2)) + else if (reqlen >= sizeof(struct mlx5_ib_alloc_ucontext_req_v2)) ver = 2; else return ERR_PTR(-EINVAL); - err = ib_copy_from_udata(&req, udata, reqlen); + err = ib_copy_from_udata(&req, udata, min(reqlen, sizeof(req))); if (err) return ERR_PTR(err); - if (req.flags || req.reserved) + if (req.flags) return ERR_PTR(-EINVAL); if (req.total_num_uuars > MLX5_MAX_UUARS) @@ -833,6 +832,14 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, if (req.total_num_uuars == 0) return ERR_PTR(-EINVAL); + if (req.comp_mask) + return ERR_PTR(-EOPNOTSUPP); + + if (reqlen > sizeof(req) && + !ib_is_udata_cleared(udata, sizeof(req), + udata->inlen - sizeof(req))) + return ERR_PTR(-EOPNOTSUPP); + req.total_num_uuars = ALIGN(req.total_num_uuars, MLX5_NON_FP_BF_REGS_PER_PAGE); if (req.num_low_latency_uuars > req.total_num_uuars - 1) @@ -848,6 +855,8 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, resp.max_send_wqebb = 1 << MLX5_CAP_GEN(dev->mdev, log_max_qp_sz); resp.max_recv_wr = 1 << MLX5_CAP_GEN(dev->mdev, log_max_qp_sz); resp.max_srq_recv_wr = 1 << MLX5_CAP_GEN(dev->mdev, log_max_srq_sz); + resp.response_length = min(offsetof(typeof(resp), response_length) + + sizeof(resp.response_length), udata->outlen); context = kzalloc(sizeof(*context), GFP_KERNEL); if (!context) @@ -898,8 +907,20 @@ static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev, resp.tot_uuars = req.total_num_uuars; resp.num_ports = MLX5_CAP_GEN(dev->mdev, num_ports); - err = ib_copy_to_udata(udata, &resp, - sizeof(resp) - sizeof(resp.reserved)); + + if (field_avail(typeof(resp), reserved2, udata->outlen)) + resp.response_length += sizeof(resp.reserved2); + + if (field_avail(typeof(resp), hca_core_clock_offset, udata->outlen)) { + resp.comp_mask |= + MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_CORE_CLOCK_OFFSET; + resp.hca_core_clock_offset = + offsetof(struct mlx5_init_seg, internal_timer_h) % + PAGE_SIZE; + resp.response_length += sizeof(resp.hca_core_clock_offset); + } + + err = ib_copy_to_udata(udata, &resp, resp.response_length); if (err) goto out_uars; diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index b0deeb3..b2a6643 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -55,6 +55,9 @@ pr_err("%s:%s:%d:(pid %d): " format, (dev)->ib_dev.name, __func__, \ pr_warn("%s:%s:%d:(pid %d): " format, (dev)->ib_dev.name, __func__, \ __LINE__, current->pid, ##arg) +#define field_avail(type, fld, sz) (offsetof(type, fld) + \ + sizeof(((type *)0)->fld) <= (sz)) + enum { MLX5_IB_MMAP_CMD_SHIFT = 8, MLX5_IB_MMAP_CMD_MASK = 0xff, diff --git a/drivers/infiniband/hw/mlx5/user.h b/drivers/infiniband/hw/mlx5/user.h index 76fb7b9..e22a35f 100644 --- a/drivers/infiniband/hw/mlx5/user.h +++ b/drivers/infiniband/hw/mlx5/user.h @@ -66,7 +66,11 @@ struct mlx5_ib_alloc_ucontext_req_v2 { __u32 total_num_uuars; __u32 num_low_latency_uuars; __u32 flags; - __u32 reserved; + __u32 comp_mask; +}; + +enum mlx5_ib_alloc_ucontext_resp_mask { + MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_CORE_CLOCK_OFFSET = 1UL << 0, }; struct mlx5_ib_alloc_ucontext_resp { @@ -80,7 +84,11 @@ struct mlx5_ib_alloc_ucontext_resp { __u32 max_recv_wr; __u32 max_srq_recv_wr; __u16 num_ports; - __u16 reserved; + __u16 reserved1; + __u32 comp_mask; + __u32 response_length; + __u32 reserved2; + __u64 hca_core_clock_offset; }; struct mlx5_ib_alloc_pd_resp { |