xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

IB/mlx5: Move to fully dynamic UAR mode once user space supports it

Browse Source 
Move to fully dynamic UAR mode once user space supports it.  In this case
we prevent any legacy mode of UARs on the allocated context and prevent
redundant allocation of the static ones.

Link: https://lore.kernel.org/r/20200324060143.1569116-6-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Michael Guralnik <michaelgur@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
2020-03-24 08:01:43 +02:00
committed by Jason Gunthorpe
parent 2152862298
commit 0a2fd01c28
5 changed files with 26 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/infiniband/hw/mlx5/main.c
View File

@@ -1786,6 +1786,7 @@ static int mlx5_ib_alloc_ucontext(struct ib_ucontext *uctx,
max_cqe_version);
u32 dump_fill_mkey;
bool lib_uar_4k;
bool lib_uar_dyn;
if (!dev->ib_active)
return -EAGAIN;
@@ -1844,8 +1845,14 @@ static int mlx5_ib_alloc_ucontext(struct ib_ucontext *uctx,
}
lib_uar_4k = req.lib_caps & MLX5_LIB_CAP_4K_UAR;
lib_uar_dyn = req.lib_caps & MLX5_LIB_CAP_DYN_UAR;
bfregi = &context->bfregi;
if (lib_uar_dyn) {
bfregi->lib_uar_dyn = lib_uar_dyn;
goto uar_done;
}
/* updates req->total_num_bfregs */
err = calc_total_bfregs(dev, lib_uar_4k, &req, bfregi);
if (err)
@@ -1872,6 +1879,7 @@ static int mlx5_ib_alloc_ucontext(struct ib_ucontext *uctx,
if (err)
goto out_sys_pages;
uar_done:
if (req.flags & MLX5_IB_ALLOC_UCTX_DEVX) {
err = mlx5_ib_devx_create(dev, true);
if (err < 0)
@@ -1893,7 +1901,7 @@ static int mlx5_ib_alloc_ucontext(struct ib_ucontext *uctx,
INIT_LIST_HEAD(&context->db_page_list);
mutex_init(&context->db_page_mutex);
resp.tot_bfregs = req.total_num_bfregs;
resp.tot_bfregs = lib_uar_dyn ? 0 : req.total_num_bfregs;
resp.num_ports = dev->num_ports;
if (offsetofend(typeof(resp), cqe_version) <= udata->outlen)
@@ -2141,6 +2149,9 @@ static int uar_mmap(struct mlx5_ib_dev *dev, enum mlx5_ib_mmap_cmd cmd,
int max_valid_idx = dyn_uar ? bfregi->num_sys_pages :
bfregi->num_static_sys_pages;
if (bfregi->lib_uar_dyn)
return -EINVAL;
if (vma->vm_end - vma->vm_start != PAGE_SIZE)
return -EINVAL;