From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/infiniband/sw/rxe/rxe_mr.c | 677 +++++++++++++++++++++++++++++++++++++ 1 file changed, 677 insertions(+) create mode 100644 drivers/infiniband/sw/rxe/rxe_mr.c (limited to 'drivers/infiniband/sw/rxe/rxe_mr.c') diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c new file mode 100644 index 000000000..072eac4b6 --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_mr.c @@ -0,0 +1,677 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + */ + +#include + +#include "rxe.h" +#include "rxe_loc.h" + +/* Return a random 8 bit key value that is + * different than the last_key. Set last_key to -1 + * if this is the first key for an MR or MW + */ +u8 rxe_get_next_key(u32 last_key) +{ + u8 key; + + do { + get_random_bytes(&key, 1); + } while (key == last_key); + + return key; +} + +int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length) +{ + + + switch (mr->ibmr.type) { + case IB_MR_TYPE_DMA: + return 0; + + case IB_MR_TYPE_USER: + case IB_MR_TYPE_MEM_REG: + if (iova < mr->ibmr.iova || length > mr->ibmr.length || + iova > mr->ibmr.iova + mr->ibmr.length - length) + return -EFAULT; + return 0; + + default: + rxe_dbg_mr(mr, "type (%d) not supported\n", mr->ibmr.type); + return -EFAULT; + } +} + +#define IB_ACCESS_REMOTE (IB_ACCESS_REMOTE_READ \ + | IB_ACCESS_REMOTE_WRITE \ + | IB_ACCESS_REMOTE_ATOMIC) + +static void rxe_mr_init(int access, struct rxe_mr *mr) +{ + u32 lkey = mr->elem.index << 8 | rxe_get_next_key(-1); + u32 rkey = (access & IB_ACCESS_REMOTE) ? lkey : 0; + + /* set ibmr->l/rkey and also copy into private l/rkey + * for user MRs these will always be the same + * for cases where caller 'owns' the key portion + * they may be different until REG_MR WQE is executed. + */ + mr->lkey = mr->ibmr.lkey = lkey; + mr->rkey = mr->ibmr.rkey = rkey; + + mr->state = RXE_MR_STATE_INVALID; +} + +static int rxe_mr_alloc(struct rxe_mr *mr, int num_buf) +{ + int i; + int num_map; + struct rxe_map **map = mr->map; + + num_map = (num_buf + RXE_BUF_PER_MAP - 1) / RXE_BUF_PER_MAP; + + mr->map = kmalloc_array(num_map, sizeof(*map), GFP_KERNEL); + if (!mr->map) + goto err1; + + for (i = 0; i < num_map; i++) { + mr->map[i] = kmalloc(sizeof(**map), GFP_KERNEL); + if (!mr->map[i]) + goto err2; + } + + BUILD_BUG_ON(!is_power_of_2(RXE_BUF_PER_MAP)); + + mr->map_shift = ilog2(RXE_BUF_PER_MAP); + mr->map_mask = RXE_BUF_PER_MAP - 1; + + mr->num_buf = num_buf; + mr->num_map = num_map; + mr->max_buf = num_map * RXE_BUF_PER_MAP; + + return 0; + +err2: + for (i--; i >= 0; i--) + kfree(mr->map[i]); + + kfree(mr->map); + mr->map = NULL; +err1: + return -ENOMEM; +} + +void rxe_mr_init_dma(int access, struct rxe_mr *mr) +{ + rxe_mr_init(access, mr); + + mr->access = access; + mr->state = RXE_MR_STATE_VALID; + mr->ibmr.type = IB_MR_TYPE_DMA; +} + +static bool is_pmem_page(struct page *pg) +{ + unsigned long paddr = page_to_phys(pg); + + return REGION_INTERSECTS == + region_intersects(paddr, PAGE_SIZE, IORESOURCE_MEM, + IORES_DESC_PERSISTENT_MEMORY); +} + +int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova, + int access, struct rxe_mr *mr) +{ + struct rxe_map **map; + struct rxe_phys_buf *buf = NULL; + struct ib_umem *umem; + struct sg_page_iter sg_iter; + int num_buf; + void *vaddr; + int err; + + umem = ib_umem_get(&rxe->ib_dev, start, length, access); + if (IS_ERR(umem)) { + rxe_dbg_mr(mr, "Unable to pin memory region err = %d\n", + (int)PTR_ERR(umem)); + err = PTR_ERR(umem); + goto err_out; + } + + num_buf = ib_umem_num_pages(umem); + + rxe_mr_init(access, mr); + + err = rxe_mr_alloc(mr, num_buf); + if (err) { + rxe_dbg_mr(mr, "Unable to allocate memory for map\n"); + goto err_release_umem; + } + + mr->page_shift = PAGE_SHIFT; + mr->page_mask = PAGE_SIZE - 1; + + num_buf = 0; + map = mr->map; + if (length > 0) { + bool persistent_access = access & IB_ACCESS_FLUSH_PERSISTENT; + + buf = map[0]->buf; + for_each_sgtable_page (&umem->sgt_append.sgt, &sg_iter, 0) { + struct page *pg = sg_page_iter_page(&sg_iter); + + if (persistent_access && !is_pmem_page(pg)) { + rxe_dbg_mr(mr, "Unable to register persistent access to non-pmem device\n"); + err = -EINVAL; + goto err_release_umem; + } + + if (num_buf >= RXE_BUF_PER_MAP) { + map++; + buf = map[0]->buf; + num_buf = 0; + } + + vaddr = page_address(pg); + if (!vaddr) { + rxe_dbg_mr(mr, "Unable to get virtual address\n"); + err = -ENOMEM; + goto err_release_umem; + } + buf->addr = (uintptr_t)vaddr; + buf->size = PAGE_SIZE; + num_buf++; + buf++; + + } + } + + mr->umem = umem; + mr->access = access; + mr->offset = ib_umem_offset(umem); + mr->state = RXE_MR_STATE_VALID; + mr->ibmr.type = IB_MR_TYPE_USER; + mr->ibmr.page_size = PAGE_SIZE; + + return 0; + +err_release_umem: + ib_umem_release(umem); +err_out: + return err; +} + +int rxe_mr_init_fast(int max_pages, struct rxe_mr *mr) +{ + int err; + + /* always allow remote access for FMRs */ + rxe_mr_init(IB_ACCESS_REMOTE, mr); + + err = rxe_mr_alloc(mr, max_pages); + if (err) + goto err1; + + mr->max_buf = max_pages; + mr->state = RXE_MR_STATE_FREE; + mr->ibmr.type = IB_MR_TYPE_MEM_REG; + + return 0; + +err1: + return err; +} + +static void lookup_iova(struct rxe_mr *mr, u64 iova, int *m_out, int *n_out, + size_t *offset_out) +{ + size_t offset = iova - mr->ibmr.iova + mr->offset; + int map_index; + int buf_index; + u64 length; + + if (likely(mr->page_shift)) { + *offset_out = offset & mr->page_mask; + offset >>= mr->page_shift; + *n_out = offset & mr->map_mask; + *m_out = offset >> mr->map_shift; + } else { + map_index = 0; + buf_index = 0; + + length = mr->map[map_index]->buf[buf_index].size; + + while (offset >= length) { + offset -= length; + buf_index++; + + if (buf_index == RXE_BUF_PER_MAP) { + map_index++; + buf_index = 0; + } + length = mr->map[map_index]->buf[buf_index].size; + } + + *m_out = map_index; + *n_out = buf_index; + *offset_out = offset; + } +} + +void *iova_to_vaddr(struct rxe_mr *mr, u64 iova, int length) +{ + size_t offset; + int m, n; + void *addr; + + if (mr->state != RXE_MR_STATE_VALID) { + rxe_dbg_mr(mr, "Not in valid state\n"); + addr = NULL; + goto out; + } + + if (!mr->map) { + addr = (void *)(uintptr_t)iova; + goto out; + } + + if (mr_check_range(mr, iova, length)) { + rxe_dbg_mr(mr, "Range violation\n"); + addr = NULL; + goto out; + } + + lookup_iova(mr, iova, &m, &n, &offset); + + if (offset + length > mr->map[m]->buf[n].size) { + rxe_dbg_mr(mr, "Crosses page boundary\n"); + addr = NULL; + goto out; + } + + addr = (void *)(uintptr_t)mr->map[m]->buf[n].addr + offset; + +out: + return addr; +} + +int rxe_flush_pmem_iova(struct rxe_mr *mr, u64 iova, int length) +{ + size_t offset; + + if (length == 0) + return 0; + + if (mr->ibmr.type == IB_MR_TYPE_DMA) + return -EFAULT; + + offset = (iova - mr->ibmr.iova + mr->offset) & mr->page_mask; + while (length > 0) { + u8 *va; + int bytes; + + bytes = mr->ibmr.page_size - offset; + if (bytes > length) + bytes = length; + + va = iova_to_vaddr(mr, iova, length); + if (!va) + return -EFAULT; + + arch_wb_cache_pmem(va, bytes); + + length -= bytes; + iova += bytes; + offset = 0; + } + + return 0; +} + +/* copy data from a range (vaddr, vaddr+length-1) to or from + * a mr object starting at iova. + */ +int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr, int length, + enum rxe_mr_copy_dir dir) +{ + int err; + int bytes; + u8 *va; + struct rxe_map **map; + struct rxe_phys_buf *buf; + int m; + int i; + size_t offset; + + if (length == 0) + return 0; + + if (mr->ibmr.type == IB_MR_TYPE_DMA) { + u8 *src, *dest; + + src = (dir == RXE_TO_MR_OBJ) ? addr : ((void *)(uintptr_t)iova); + + dest = (dir == RXE_TO_MR_OBJ) ? ((void *)(uintptr_t)iova) : addr; + + memcpy(dest, src, length); + + return 0; + } + + WARN_ON_ONCE(!mr->map); + + err = mr_check_range(mr, iova, length); + if (err) { + err = -EFAULT; + goto err1; + } + + lookup_iova(mr, iova, &m, &i, &offset); + + map = mr->map + m; + buf = map[0]->buf + i; + + while (length > 0) { + u8 *src, *dest; + + va = (u8 *)(uintptr_t)buf->addr + offset; + src = (dir == RXE_TO_MR_OBJ) ? addr : va; + dest = (dir == RXE_TO_MR_OBJ) ? va : addr; + + bytes = buf->size - offset; + + if (bytes > length) + bytes = length; + + memcpy(dest, src, bytes); + + length -= bytes; + addr += bytes; + + offset = 0; + buf++; + i++; + + if (i == RXE_BUF_PER_MAP) { + i = 0; + map++; + buf = map[0]->buf; + } + } + + return 0; + +err1: + return err; +} + +/* copy data in or out of a wqe, i.e. sg list + * under the control of a dma descriptor + */ +int copy_data( + struct rxe_pd *pd, + int access, + struct rxe_dma_info *dma, + void *addr, + int length, + enum rxe_mr_copy_dir dir) +{ + int bytes; + struct rxe_sge *sge = &dma->sge[dma->cur_sge]; + int offset = dma->sge_offset; + int resid = dma->resid; + struct rxe_mr *mr = NULL; + u64 iova; + int err; + + if (length == 0) + return 0; + + if (length > resid) { + err = -EINVAL; + goto err2; + } + + if (sge->length && (offset < sge->length)) { + mr = lookup_mr(pd, access, sge->lkey, RXE_LOOKUP_LOCAL); + if (!mr) { + err = -EINVAL; + goto err1; + } + } + + while (length > 0) { + bytes = length; + + if (offset >= sge->length) { + if (mr) { + rxe_put(mr); + mr = NULL; + } + sge++; + dma->cur_sge++; + offset = 0; + + if (dma->cur_sge >= dma->num_sge) { + err = -ENOSPC; + goto err2; + } + + if (sge->length) { + mr = lookup_mr(pd, access, sge->lkey, + RXE_LOOKUP_LOCAL); + if (!mr) { + err = -EINVAL; + goto err1; + } + } else { + continue; + } + } + + if (bytes > sge->length - offset) + bytes = sge->length - offset; + + if (bytes > 0) { + iova = sge->addr + offset; + + err = rxe_mr_copy(mr, iova, addr, bytes, dir); + if (err) + goto err2; + + offset += bytes; + resid -= bytes; + length -= bytes; + addr += bytes; + } + } + + dma->sge_offset = offset; + dma->resid = resid; + + if (mr) + rxe_put(mr); + + return 0; + +err2: + if (mr) + rxe_put(mr); +err1: + return err; +} + +int advance_dma_data(struct rxe_dma_info *dma, unsigned int length) +{ + struct rxe_sge *sge = &dma->sge[dma->cur_sge]; + int offset = dma->sge_offset; + int resid = dma->resid; + + while (length) { + unsigned int bytes; + + if (offset >= sge->length) { + sge++; + dma->cur_sge++; + offset = 0; + if (dma->cur_sge >= dma->num_sge) + return -ENOSPC; + } + + bytes = length; + + if (bytes > sge->length - offset) + bytes = sge->length - offset; + + offset += bytes; + resid -= bytes; + length -= bytes; + } + + dma->sge_offset = offset; + dma->resid = resid; + + return 0; +} + +/* (1) find the mr corresponding to lkey/rkey + * depending on lookup_type + * (2) verify that the (qp) pd matches the mr pd + * (3) verify that the mr can support the requested access + * (4) verify that mr state is valid + */ +struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key, + enum rxe_mr_lookup_type type) +{ + struct rxe_mr *mr; + struct rxe_dev *rxe = to_rdev(pd->ibpd.device); + int index = key >> 8; + + mr = rxe_pool_get_index(&rxe->mr_pool, index); + if (!mr) + return NULL; + + if (unlikely((type == RXE_LOOKUP_LOCAL && mr->lkey != key) || + (type == RXE_LOOKUP_REMOTE && mr->rkey != key) || + mr_pd(mr) != pd || ((access & mr->access) != access) || + mr->state != RXE_MR_STATE_VALID)) { + rxe_put(mr); + mr = NULL; + } + + return mr; +} + +int rxe_invalidate_mr(struct rxe_qp *qp, u32 key) +{ + struct rxe_dev *rxe = to_rdev(qp->ibqp.device); + struct rxe_mr *mr; + int ret; + + mr = rxe_pool_get_index(&rxe->mr_pool, key >> 8); + if (!mr) { + rxe_dbg_qp(qp, "No MR for key %#x\n", key); + ret = -EINVAL; + goto err; + } + + if (mr->rkey ? (key != mr->rkey) : (key != mr->lkey)) { + rxe_dbg_mr(mr, "wr key (%#x) doesn't match mr key (%#x)\n", + key, (mr->rkey ? mr->rkey : mr->lkey)); + ret = -EINVAL; + goto err_drop_ref; + } + + if (atomic_read(&mr->num_mw) > 0) { + rxe_dbg_mr(mr, "Attempt to invalidate an MR while bound to MWs\n"); + ret = -EINVAL; + goto err_drop_ref; + } + + if (unlikely(mr->ibmr.type != IB_MR_TYPE_MEM_REG)) { + rxe_dbg_mr(mr, "Type (%d) is wrong\n", mr->ibmr.type); + ret = -EINVAL; + goto err_drop_ref; + } + + mr->state = RXE_MR_STATE_FREE; + ret = 0; + +err_drop_ref: + rxe_put(mr); +err: + return ret; +} + +/* user can (re)register fast MR by executing a REG_MR WQE. + * user is expected to hold a reference on the ib mr until the + * WQE completes. + * Once a fast MR is created this is the only way to change the + * private keys. It is the responsibility of the user to maintain + * the ib mr keys in sync with rxe mr keys. + */ +int rxe_reg_fast_mr(struct rxe_qp *qp, struct rxe_send_wqe *wqe) +{ + struct rxe_mr *mr = to_rmr(wqe->wr.wr.reg.mr); + u32 key = wqe->wr.wr.reg.key; + u32 access = wqe->wr.wr.reg.access; + + /* user can only register MR in free state */ + if (unlikely(mr->state != RXE_MR_STATE_FREE)) { + rxe_dbg_mr(mr, "mr->lkey = 0x%x not free\n", mr->lkey); + return -EINVAL; + } + + /* user can only register mr with qp in same protection domain */ + if (unlikely(qp->ibqp.pd != mr->ibmr.pd)) { + rxe_dbg_mr(mr, "qp->pd and mr->pd don't match\n"); + return -EINVAL; + } + + /* user is only allowed to change key portion of l/rkey */ + if (unlikely((mr->lkey & ~0xff) != (key & ~0xff))) { + rxe_dbg_mr(mr, "key = 0x%x has wrong index mr->lkey = 0x%x\n", + key, mr->lkey); + return -EINVAL; + } + + mr->access = access; + mr->lkey = key; + mr->rkey = (access & IB_ACCESS_REMOTE) ? key : 0; + mr->ibmr.iova = wqe->wr.wr.reg.mr->iova; + mr->state = RXE_MR_STATE_VALID; + + return 0; +} + +int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) +{ + struct rxe_mr *mr = to_rmr(ibmr); + + /* See IBA 10.6.7.2.6 */ + if (atomic_read(&mr->num_mw) > 0) + return -EINVAL; + + rxe_cleanup(mr); + + return 0; +} + +void rxe_mr_cleanup(struct rxe_pool_elem *elem) +{ + struct rxe_mr *mr = container_of(elem, typeof(*mr), elem); + int i; + + rxe_put(mr_pd(mr)); + ib_umem_release(mr->umem); + + if (mr->map) { + for (i = 0; i < mr->num_map; i++) + kfree(mr->map[i]); + + kfree(mr->map); + } +} -- cgit v1.2.3