IB/core: Add user MR re-registration support
Memory re-registration is a feature that enables changing the attributes of a memory region registered by user-space, including PD, translation (address and length) and access flags. Add the required support in uverbs and the kernel verbs API. Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Родитель
64aa90f26c
Коммит
7e6edb9b2e
|
@ -221,6 +221,7 @@ IB_UVERBS_DECLARE_CMD(query_port);
|
|||
IB_UVERBS_DECLARE_CMD(alloc_pd);
|
||||
IB_UVERBS_DECLARE_CMD(dealloc_pd);
|
||||
IB_UVERBS_DECLARE_CMD(reg_mr);
|
||||
IB_UVERBS_DECLARE_CMD(rereg_mr);
|
||||
IB_UVERBS_DECLARE_CMD(dereg_mr);
|
||||
IB_UVERBS_DECLARE_CMD(alloc_mw);
|
||||
IB_UVERBS_DECLARE_CMD(dealloc_mw);
|
||||
|
|
|
@ -1002,6 +1002,99 @@ err_free:
|
|||
return ret;
|
||||
}
|
||||
|
||||
ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
|
||||
const char __user *buf, int in_len,
|
||||
int out_len)
|
||||
{
|
||||
struct ib_uverbs_rereg_mr cmd;
|
||||
struct ib_uverbs_rereg_mr_resp resp;
|
||||
struct ib_udata udata;
|
||||
struct ib_pd *pd = NULL;
|
||||
struct ib_mr *mr;
|
||||
struct ib_pd *old_pd;
|
||||
int ret;
|
||||
struct ib_uobject *uobj;
|
||||
|
||||
if (out_len < sizeof(resp))
|
||||
return -ENOSPC;
|
||||
|
||||
if (copy_from_user(&cmd, buf, sizeof(cmd)))
|
||||
return -EFAULT;
|
||||
|
||||
INIT_UDATA(&udata, buf + sizeof(cmd),
|
||||
(unsigned long) cmd.response + sizeof(resp),
|
||||
in_len - sizeof(cmd), out_len - sizeof(resp));
|
||||
|
||||
if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
|
||||
return -EINVAL;
|
||||
|
||||
if ((cmd.flags & IB_MR_REREG_TRANS) &&
|
||||
(!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
|
||||
(cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
|
||||
return -EINVAL;
|
||||
|
||||
uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
|
||||
file->ucontext);
|
||||
|
||||
if (!uobj)
|
||||
return -EINVAL;
|
||||
|
||||
mr = uobj->object;
|
||||
|
||||
if (cmd.flags & IB_MR_REREG_ACCESS) {
|
||||
ret = ib_check_mr_access(cmd.access_flags);
|
||||
if (ret)
|
||||
goto put_uobjs;
|
||||
}
|
||||
|
||||
if (cmd.flags & IB_MR_REREG_PD) {
|
||||
pd = idr_read_pd(cmd.pd_handle, file->ucontext);
|
||||
if (!pd) {
|
||||
ret = -EINVAL;
|
||||
goto put_uobjs;
|
||||
}
|
||||
}
|
||||
|
||||
if (atomic_read(&mr->usecnt)) {
|
||||
ret = -EBUSY;
|
||||
goto put_uobj_pd;
|
||||
}
|
||||
|
||||
old_pd = mr->pd;
|
||||
ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
|
||||
cmd.length, cmd.hca_va,
|
||||
cmd.access_flags, pd, &udata);
|
||||
if (!ret) {
|
||||
if (cmd.flags & IB_MR_REREG_PD) {
|
||||
atomic_inc(&pd->usecnt);
|
||||
mr->pd = pd;
|
||||
atomic_dec(&old_pd->usecnt);
|
||||
}
|
||||
} else {
|
||||
goto put_uobj_pd;
|
||||
}
|
||||
|
||||
memset(&resp, 0, sizeof(resp));
|
||||
resp.lkey = mr->lkey;
|
||||
resp.rkey = mr->rkey;
|
||||
|
||||
if (copy_to_user((void __user *)(unsigned long)cmd.response,
|
||||
&resp, sizeof(resp)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = in_len;
|
||||
|
||||
put_uobj_pd:
|
||||
if (cmd.flags & IB_MR_REREG_PD)
|
||||
put_pd_read(pd);
|
||||
|
||||
put_uobjs:
|
||||
|
||||
put_uobj_write(mr->uobject);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
|
||||
const char __user *buf, int in_len,
|
||||
int out_len)
|
||||
|
|
|
@ -87,6 +87,7 @@ static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
|
|||
[IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
|
||||
[IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
|
||||
[IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
|
||||
[IB_USER_VERBS_CMD_REREG_MR] = ib_uverbs_rereg_mr,
|
||||
[IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
|
||||
[IB_USER_VERBS_CMD_ALLOC_MW] = ib_uverbs_alloc_mw,
|
||||
[IB_USER_VERBS_CMD_DEALLOC_MW] = ib_uverbs_dealloc_mw,
|
||||
|
|
|
@ -1097,7 +1097,8 @@ struct ib_mr_attr {
|
|||
enum ib_mr_rereg_flags {
|
||||
IB_MR_REREG_TRANS = 1,
|
||||
IB_MR_REREG_PD = (1<<1),
|
||||
IB_MR_REREG_ACCESS = (1<<2)
|
||||
IB_MR_REREG_ACCESS = (1<<2),
|
||||
IB_MR_REREG_SUPPORTED = ((IB_MR_REREG_ACCESS << 1) - 1)
|
||||
};
|
||||
|
||||
/**
|
||||
|
@ -1547,6 +1548,13 @@ struct ib_device {
|
|||
u64 virt_addr,
|
||||
int mr_access_flags,
|
||||
struct ib_udata *udata);
|
||||
int (*rereg_user_mr)(struct ib_mr *mr,
|
||||
int flags,
|
||||
u64 start, u64 length,
|
||||
u64 virt_addr,
|
||||
int mr_access_flags,
|
||||
struct ib_pd *pd,
|
||||
struct ib_udata *udata);
|
||||
int (*query_mr)(struct ib_mr *mr,
|
||||
struct ib_mr_attr *mr_attr);
|
||||
int (*dereg_mr)(struct ib_mr *mr);
|
||||
|
|
|
@ -276,6 +276,22 @@ struct ib_uverbs_reg_mr_resp {
|
|||
__u32 rkey;
|
||||
};
|
||||
|
||||
struct ib_uverbs_rereg_mr {
|
||||
__u64 response;
|
||||
__u32 mr_handle;
|
||||
__u32 flags;
|
||||
__u64 start;
|
||||
__u64 length;
|
||||
__u64 hca_va;
|
||||
__u32 pd_handle;
|
||||
__u32 access_flags;
|
||||
};
|
||||
|
||||
struct ib_uverbs_rereg_mr_resp {
|
||||
__u32 lkey;
|
||||
__u32 rkey;
|
||||
};
|
||||
|
||||
struct ib_uverbs_dereg_mr {
|
||||
__u32 mr_handle;
|
||||
};
|
||||
|
|
Загрузка…
Ссылка в новой задаче