diff options
| -rw-r--r-- | drivers/infiniband/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/infiniband/core/umem.c | 8 | ||||
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 25 | ||||
| -rw-r--r-- | include/rdma/ib_verbs.h | 28 | ||||
| -rw-r--r-- | include/uapi/rdma/ib_user_verbs.h | 15 |
5 files changed, 81 insertions, 5 deletions
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig index 77089399359b..089a2c2af329 100644 --- a/drivers/infiniband/Kconfig +++ b/drivers/infiniband/Kconfig @@ -38,6 +38,16 @@ config INFINIBAND_USER_MEM depends on INFINIBAND_USER_ACCESS != n default y +config INFINIBAND_ON_DEMAND_PAGING + bool "InfiniBand on-demand paging support" + depends on INFINIBAND_USER_MEM + default y + ---help--- + On demand paging support for the InfiniBand subsystem. + Together with driver support this allows registration of + memory regions without pinning their pages, fetching the + pages on demand instead. + config INFINIBAND_ADDR_TRANS bool depends on INFINIBAND diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 6f152628e0d2..c328e4693d14 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -107,13 +107,15 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, umem->page_size = PAGE_SIZE; umem->pid = get_task_pid(current, PIDTYPE_PID); /* - * We ask for writable memory if any access flags other than - * "remote read" are set. "Local write" and "remote write" + * We ask for writable memory if any of the following + * access flags are set. "Local write" and "remote write" * obviously require write access. "Remote atomic" can do * things like fetch and add, which will modify memory, and * "MW bind" can change permissions by binding a window. */ - umem->writable = !!(access & ~IB_ACCESS_REMOTE_READ); + umem->writable = !!(access & + (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND)); /* We assume the memory is from hugetlb until proved otherwise */ umem->hugetlb = 1; diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index c7a43624c96b..f9326ccda4b5 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -953,6 +953,18 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file, goto err_free; } + if (cmd.access_flags & IB_ACCESS_ON_DEMAND) { + struct ib_device_attr attr; + + ret = ib_query_device(pd->device, &attr); + if (ret || !(attr.device_cap_flags & + IB_DEVICE_ON_DEMAND_PAGING)) { + pr_debug("ODP support not available\n"); + ret = -EINVAL; + goto err_put; + } + } + mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va, cmd.access_flags, &udata); if (IS_ERR(mr)) { @@ -3289,6 +3301,19 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file, copy_query_dev_fields(file, &resp.base, &attr); resp.comp_mask = 0; +#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING + if (cmd.comp_mask & IB_USER_VERBS_EX_QUERY_DEVICE_ODP) { + resp.odp_caps.general_caps = attr.odp_caps.general_caps; + resp.odp_caps.per_transport_caps.rc_odp_caps = + attr.odp_caps.per_transport_caps.rc_odp_caps; + resp.odp_caps.per_transport_caps.uc_odp_caps = + attr.odp_caps.per_transport_caps.uc_odp_caps; + resp.odp_caps.per_transport_caps.ud_odp_caps = + attr.odp_caps.per_transport_caps.ud_odp_caps; + resp.comp_mask |= IB_USER_VERBS_EX_QUERY_DEVICE_ODP; + } +#endif + err = ib_copy_to_udata(ucore, &resp, sizeof(resp)); if (err) return err; diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 97a999f9e4d8..a41bc5a39ebf 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -123,7 +123,8 @@ enum ib_device_cap_flags { IB_DEVICE_MEM_WINDOW_TYPE_2A = (1<<23), IB_DEVICE_MEM_WINDOW_TYPE_2B = (1<<24), IB_DEVICE_MANAGED_FLOW_STEERING = (1<<29), - IB_DEVICE_SIGNATURE_HANDOVER = (1<<30) + IB_DEVICE_SIGNATURE_HANDOVER = (1<<30), + IB_DEVICE_ON_DEMAND_PAGING = (1<<31), }; enum ib_signature_prot_cap { @@ -143,6 +144,27 @@ enum ib_atomic_cap { IB_ATOMIC_GLOB }; +enum ib_odp_general_cap_bits { + IB_ODP_SUPPORT = 1 << 0, +}; + +enum ib_odp_transport_cap_bits { + IB_ODP_SUPPORT_SEND = 1 << 0, + IB_ODP_SUPPORT_RECV = 1 << 1, + IB_ODP_SUPPORT_WRITE = 1 << 2, + IB_ODP_SUPPORT_READ = 1 << 3, + IB_ODP_SUPPORT_ATOMIC = 1 << 4, +}; + +struct ib_odp_caps { + uint64_t general_caps; + struct { + uint32_t rc_odp_caps; + uint32_t uc_odp_caps; + uint32_t ud_odp_caps; + } per_transport_caps; +}; + struct ib_device_attr { u64 fw_ver; __be64 sys_image_guid; @@ -186,6 +208,7 @@ struct ib_device_attr { u8 local_ca_ack_delay; int sig_prot_cap; int sig_guard_cap; + struct ib_odp_caps odp_caps; }; enum ib_mtu { @@ -1073,7 +1096,8 @@ enum ib_access_flags { IB_ACCESS_REMOTE_READ = (1<<2), IB_ACCESS_REMOTE_ATOMIC = (1<<3), IB_ACCESS_MW_BIND = (1<<4), - IB_ZERO_BASED = (1<<5) + IB_ZERO_BASED = (1<<5), + IB_ACCESS_ON_DEMAND = (1<<6), }; struct ib_phys_buf { diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h index e8a96071e352..4275b961bf60 100644 --- a/include/uapi/rdma/ib_user_verbs.h +++ b/include/uapi/rdma/ib_user_verbs.h @@ -202,15 +202,30 @@ struct ib_uverbs_query_device_resp { __u8 reserved[4]; }; +enum { + IB_USER_VERBS_EX_QUERY_DEVICE_ODP = 1ULL << 0, +}; + struct ib_uverbs_ex_query_device { __u32 comp_mask; __u32 reserved; }; +struct ib_uverbs_odp_caps { + __u64 general_caps; + struct { + __u32 rc_odp_caps; + __u32 uc_odp_caps; + __u32 ud_odp_caps; + } per_transport_caps; + __u32 reserved; +}; + struct ib_uverbs_ex_query_device_resp { struct ib_uverbs_query_device_resp base; __u32 comp_mask; __u32 reserved; + struct ib_uverbs_odp_caps odp_caps; }; struct ib_uverbs_query_port { |