diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/verbs.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/verbs.c | 1764 |
1 files changed, 1764 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c new file mode 100644 index 000000000000..849c4b9399d4 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/verbs.c @@ -0,0 +1,1764 @@ +/* + * Copyright(c) 2015, 2016 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include <rdma/ib_mad.h> +#include <rdma/ib_user_verbs.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/utsname.h> +#include <linux/rculist.h> +#include <linux/mm.h> +#include <linux/vmalloc.h> + +#include "hfi.h" +#include "common.h" +#include "device.h" +#include "trace.h" +#include "qp.h" +#include "verbs_txreq.h" + +static unsigned int hfi1_lkey_table_size = 16; +module_param_named(lkey_table_size, hfi1_lkey_table_size, uint, + S_IRUGO); +MODULE_PARM_DESC(lkey_table_size, + "LKEY table size in bits (2^n, 1 <= n <= 23)"); + +static unsigned int hfi1_max_pds = 0xFFFF; +module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO); +MODULE_PARM_DESC(max_pds, + "Maximum number of protection domains to support"); + +static unsigned int hfi1_max_ahs = 0xFFFF; +module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO); +MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support"); + +unsigned int hfi1_max_cqes = 0x2FFFF; +module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO); +MODULE_PARM_DESC(max_cqes, + "Maximum number of completion queue entries to support"); + +unsigned int hfi1_max_cqs = 0x1FFFF; +module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO); +MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support"); + +unsigned int hfi1_max_qp_wrs = 0x3FFF; +module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO); +MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support"); + +unsigned int hfi1_max_qps = 16384; +module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO); +MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support"); + +unsigned int hfi1_max_sges = 0x60; +module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO); +MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support"); + +unsigned int hfi1_max_mcast_grps = 16384; +module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO); +MODULE_PARM_DESC(max_mcast_grps, + "Maximum number of multicast groups to support"); + +unsigned int hfi1_max_mcast_qp_attached = 16; +module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached, + uint, S_IRUGO); +MODULE_PARM_DESC(max_mcast_qp_attached, + "Maximum number of attached QPs to support"); + +unsigned int hfi1_max_srqs = 1024; +module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO); +MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support"); + +unsigned int hfi1_max_srq_sges = 128; +module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO); +MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support"); + +unsigned int hfi1_max_srq_wrs = 0x1FFFF; +module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO); +MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support"); + +unsigned short piothreshold = 256; +module_param(piothreshold, ushort, S_IRUGO); +MODULE_PARM_DESC(piothreshold, "size used to determine sdma vs. pio"); + +#define COPY_CACHELESS 1 +#define COPY_ADAPTIVE 2 +static unsigned int sge_copy_mode; +module_param(sge_copy_mode, uint, S_IRUGO); +MODULE_PARM_DESC(sge_copy_mode, + "Verbs copy mode: 0 use memcpy, 1 use cacheless copy, 2 adapt based on WSS"); + +static void verbs_sdma_complete( + struct sdma_txreq *cookie, + int status); + +static int pio_wait(struct rvt_qp *qp, + struct send_context *sc, + struct hfi1_pkt_state *ps, + u32 flag); + +/* Length of buffer to create verbs txreq cache name */ +#define TXREQ_NAME_LEN 24 + +static uint wss_threshold; +module_param(wss_threshold, uint, S_IRUGO); +MODULE_PARM_DESC(wss_threshold, "Percentage (1-100) of LLC to use as a threshold for a cacheless copy"); +static uint wss_clean_period = 256; +module_param(wss_clean_period, uint, S_IRUGO); +MODULE_PARM_DESC(wss_clean_period, "Count of verbs copies before an entry in the page copy table is cleaned"); + +/* memory working set size */ +struct hfi1_wss { + unsigned long *entries; + atomic_t total_count; + atomic_t clean_counter; + atomic_t clean_entry; + + int threshold; + int num_entries; + long pages_mask; +}; + +static struct hfi1_wss wss; + +int hfi1_wss_init(void) +{ + long llc_size; + long llc_bits; + long table_size; + long table_bits; + + /* check for a valid percent range - default to 80 if none or invalid */ + if (wss_threshold < 1 || wss_threshold > 100) + wss_threshold = 80; + /* reject a wildly large period */ + if (wss_clean_period > 1000000) + wss_clean_period = 256; + /* reject a zero period */ + if (wss_clean_period == 0) + wss_clean_period = 1; + + /* + * Calculate the table size - the next power of 2 larger than the + * LLC size. LLC size is in KiB. + */ + llc_size = wss_llc_size() * 1024; + table_size = roundup_pow_of_two(llc_size); + + /* one bit per page in rounded up table */ + llc_bits = llc_size / PAGE_SIZE; + table_bits = table_size / PAGE_SIZE; + wss.pages_mask = table_bits - 1; + wss.num_entries = table_bits / BITS_PER_LONG; + + wss.threshold = (llc_bits * wss_threshold) / 100; + if (wss.threshold == 0) + wss.threshold = 1; + + atomic_set(&wss.clean_counter, wss_clean_period); + + wss.entries = kcalloc(wss.num_entries, sizeof(*wss.entries), + GFP_KERNEL); + if (!wss.entries) { + hfi1_wss_exit(); + return -ENOMEM; + } + + return 0; +} + +void hfi1_wss_exit(void) +{ + /* coded to handle partially initialized and repeat callers */ + kfree(wss.entries); + wss.entries = NULL; +} + +/* + * Advance the clean counter. When the clean period has expired, + * clean an entry. + * + * This is implemented in atomics to avoid locking. Because multiple + * variables are involved, it can be racy which can lead to slightly + * inaccurate information. Since this is only a heuristic, this is + * OK. Any innaccuracies will clean themselves out as the counter + * advances. That said, it is unlikely the entry clean operation will + * race - the next possible racer will not start until the next clean + * period. + * + * The clean counter is implemented as a decrement to zero. When zero + * is reached an entry is cleaned. + */ +static void wss_advance_clean_counter(void) +{ + int entry; + int weight; + unsigned long bits; + + /* become the cleaner if we decrement the counter to zero */ + if (atomic_dec_and_test(&wss.clean_counter)) { + /* + * Set, not add, the clean period. This avoids an issue + * where the counter could decrement below the clean period. + * Doing a set can result in lost decrements, slowing the + * clean advance. Since this a heuristic, this possible + * slowdown is OK. + * + * An alternative is to loop, advancing the counter by a + * clean period until the result is > 0. However, this could + * lead to several threads keeping another in the clean loop. + * This could be mitigated by limiting the number of times + * we stay in the loop. + */ + atomic_set(&wss.clean_counter, wss_clean_period); + + /* + * Uniquely grab the entry to clean and move to next. + * The current entry is always the lower bits of + * wss.clean_entry. The table size, wss.num_entries, + * is always a power-of-2. + */ + entry = (atomic_inc_return(&wss.clean_entry) - 1) + & (wss.num_entries - 1); + + /* clear the entry and count the bits */ + bits = xchg(&wss.entries[entry], 0); + weight = hweight64((u64)bits); + /* only adjust the contended total count if needed */ + if (weight) + atomic_sub(weight, &wss.total_count); + } +} + +/* + * Insert the given address into the working set array. + */ +static void wss_insert(void *address) +{ + u32 page = ((unsigned long)address >> PAGE_SHIFT) & wss.pages_mask; + u32 entry = page / BITS_PER_LONG; /* assumes this ends up a shift */ + u32 nr = page & (BITS_PER_LONG - 1); + + if (!test_and_set_bit(nr, &wss.entries[entry])) + atomic_inc(&wss.total_count); + + wss_advance_clean_counter(); +} + +/* + * Is the working set larger than the threshold? + */ +static inline int wss_exceeds_threshold(void) +{ + return atomic_read(&wss.total_count) >= wss.threshold; +} + +/* + * Translate ib_wr_opcode into ib_wc_opcode. + */ +const enum ib_wc_opcode ib_hfi1_wc_opcode[] = { + [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE, + [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE, + [IB_WR_SEND] = IB_WC_SEND, + [IB_WR_SEND_WITH_IMM] = IB_WC_SEND, + [IB_WR_RDMA_READ] = IB_WC_RDMA_READ, + [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP, + [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD +}; + +/* + * Length of header by opcode, 0 --> not supported + */ +const u8 hdr_len_by_opcode[256] = { + /* RC */ + [IB_OPCODE_RC_SEND_FIRST] = 12 + 8, + [IB_OPCODE_RC_SEND_MIDDLE] = 12 + 8, + [IB_OPCODE_RC_SEND_LAST] = 12 + 8, + [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4, + [IB_OPCODE_RC_SEND_ONLY] = 12 + 8, + [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4, + [IB_OPCODE_RC_RDMA_WRITE_FIRST] = 12 + 8 + 16, + [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = 12 + 8, + [IB_OPCODE_RC_RDMA_WRITE_LAST] = 12 + 8, + [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4, + [IB_OPCODE_RC_RDMA_WRITE_ONLY] = 12 + 8 + 16, + [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20, + [IB_OPCODE_RC_RDMA_READ_REQUEST] = 12 + 8 + 16, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = 12 + 8 + 4, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = 12 + 8, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = 12 + 8 + 4, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = 12 + 8 + 4, + [IB_OPCODE_RC_ACKNOWLEDGE] = 12 + 8 + 4, + [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = 12 + 8 + 4, + [IB_OPCODE_RC_COMPARE_SWAP] = 12 + 8 + 28, + [IB_OPCODE_RC_FETCH_ADD] = 12 + 8 + 28, + [IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE] = 12 + 8 + 4, + [IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE] = 12 + 8 + 4, + /* UC */ + [IB_OPCODE_UC_SEND_FIRST] = 12 + 8, + [IB_OPCODE_UC_SEND_MIDDLE] = 12 + 8, + [IB_OPCODE_UC_SEND_LAST] = 12 + 8, + [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4, + [IB_OPCODE_UC_SEND_ONLY] = 12 + 8, + [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4, + [IB_OPCODE_UC_RDMA_WRITE_FIRST] = 12 + 8 + 16, + [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = 12 + 8, + [IB_OPCODE_UC_RDMA_WRITE_LAST] = 12 + 8, + [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4, + [IB_OPCODE_UC_RDMA_WRITE_ONLY] = 12 + 8 + 16, + [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20, + /* UD */ + [IB_OPCODE_UD_SEND_ONLY] = 12 + 8 + 8, + [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 12 +}; + +static const opcode_handler opcode_handler_tbl[256] = { + /* RC */ + [IB_OPCODE_RC_SEND_FIRST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_MIDDLE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_LAST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_ONLY] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_FIRST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_LAST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_ONLY] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_REQUEST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = &hfi1_rc_rcv, + [IB_OPCODE_RC_ACKNOWLEDGE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_COMPARE_SWAP] = &hfi1_rc_rcv, + [IB_OPCODE_RC_FETCH_ADD] = &hfi1_rc_rcv, + /* UC */ + [IB_OPCODE_UC_SEND_FIRST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_MIDDLE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_LAST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_ONLY] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_FIRST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_LAST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_ONLY] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv, + /* UD */ + [IB_OPCODE_UD_SEND_ONLY] = &hfi1_ud_rcv, + [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_ud_rcv, + /* CNP */ + [IB_OPCODE_CNP] = &hfi1_cnp_rcv +}; + +/* + * System image GUID. + */ +__be64 ib_hfi1_sys_image_guid; + +/** + * hfi1_copy_sge - copy data to SGE memory + * @ss: the SGE state + * @data: the data to copy + * @length: the length of the data + * @copy_last: do a separate copy of the last 8 bytes + */ +void hfi1_copy_sge( + struct rvt_sge_state *ss, + void *data, u32 length, + int release, + int copy_last) +{ + struct rvt_sge *sge = &ss->sge; + int in_last = 0; + int i; + int cacheless_copy = 0; + + if (sge_copy_mode == COPY_CACHELESS) { + cacheless_copy = length >= PAGE_SIZE; + } else if (sge_copy_mode == COPY_ADAPTIVE) { + if (length >= PAGE_SIZE) { + /* + * NOTE: this *assumes*: + * o The first vaddr is the dest. + * o If multiple pages, then vaddr is sequential. + */ + wss_insert(sge->vaddr); + if (length >= (2 * PAGE_SIZE)) + wss_insert(sge->vaddr + PAGE_SIZE); + + cacheless_copy = wss_exceeds_threshold(); + } else { + wss_advance_clean_counter(); + } + } + if (copy_last) { + if (length > 8) { + length -= 8; + } else { + copy_last = 0; + in_last = 1; + } + } + +again: + while (length) { + u32 len = sge->length; + + if (len > length) + len = length; + if (len > sge->sge_length) + len = sge->sge_length; + WARN_ON_ONCE(len == 0); + if (unlikely(in_last)) { + /* enforce byte transfer ordering */ + for (i = 0; i < len; i++) + ((u8 *)sge->vaddr)[i] = ((u8 *)data)[i]; + } else if (cacheless_copy) { + cacheless_memcpy(sge->vaddr, data, len); + } else { + memcpy(sge->vaddr, data, len); + } + sge->vaddr += len; + sge->length -= len; + sge->sge_length -= len; + if (sge->sge_length == 0) { + if (release) + rvt_put_mr(sge->mr); + if (--ss->num_sge) + *sge = *ss->sg_list++; + } else if (sge->length == 0 && sge->mr->lkey) { + if (++sge->n >= RVT_SEGSZ) { + if (++sge->m >= sge->mr->mapsz) + break; + sge->n = 0; + } + sge->vaddr = + sge->mr->map[sge->m]->segs[sge->n].vaddr; + sge->length = + sge->mr->map[sge->m]->segs[sge->n].length; + } + data += len; + length -= len; + } + + if (copy_last) { + copy_last = 0; + in_last = 1; + length = 8; + goto again; + } +} + +/** + * hfi1_skip_sge - skip over SGE memory + * @ss: the SGE state + * @length: the number of bytes to skip + */ +void hfi1_skip_sge(struct rvt_sge_state *ss, u32 length, int release) +{ + struct rvt_sge *sge = &ss->sge; + + while (length) { + u32 len = sge->length; + + if (len > length) + len = length; + if (len > sge->sge_length) + len = sge->sge_length; + WARN_ON_ONCE(len == 0); + sge->vaddr += len; + sge->length -= len; + sge->sge_length -= len; + if (sge->sge_length == 0) { + if (release) + rvt_put_mr(sge->mr); + if (--ss->num_sge) + *sge = *ss->sg_list++; + } else if (sge->length == 0 && sge->mr->lkey) { + if (++sge->n >= RVT_SEGSZ) { + if (++sge->m >= sge->mr->mapsz) + break; + sge->n = 0; + } + sge->vaddr = + sge->mr->map[sge->m]->segs[sge->n].vaddr; + sge->length = + sge->mr->map[sge->m]->segs[sge->n].length; + } + length -= len; + } +} + +/* + * Make sure the QP is ready and able to accept the given opcode. + */ +static inline int qp_ok(int opcode, struct hfi1_packet *packet) +{ + struct hfi1_ibport *ibp; + + if (!(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK)) + goto dropit; + if (((opcode & RVT_OPCODE_QP_MASK) == packet->qp->allowed_ops) || + (opcode == IB_OPCODE_CNP)) + return 1; +dropit: + ibp = &packet->rcd->ppd->ibport_data; + ibp->rvp.n_pkt_drops++; + return 0; +} + +/** + * hfi1_ib_rcv - process an incoming packet + * @packet: data packet information + * + * This is called to process an incoming packet at interrupt level. + * + * Tlen is the length of the header + data + CRC in bytes. + */ +void hfi1_ib_rcv(struct hfi1_packet *packet) +{ + struct hfi1_ctxtdata *rcd = packet->rcd; + struct hfi1_ib_header *hdr = packet->hdr; + u32 tlen = packet->tlen; + struct hfi1_pportdata *ppd = rcd->ppd; + struct hfi1_ibport *ibp = &ppd->ibport_data; + struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi; + unsigned long flags; + u32 qp_num; + int lnh; + u8 opcode; + u16 lid; + + /* Check for GRH */ + lnh = be16_to_cpu(hdr->lrh[0]) & 3; + if (lnh == HFI1_LRH_BTH) { + packet->ohdr = &hdr->u.oth; + } else if (lnh == HFI1_LRH_GRH) { + u32 vtf; + + packet->ohdr = &hdr->u.l.oth; + if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR) + goto drop; + vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow); + if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) + goto drop; + packet->rcv_flags |= HFI1_HAS_GRH; + } else { + goto drop; + } + + trace_input_ibhdr(rcd->dd, hdr); + + opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24); + inc_opstats(tlen, &rcd->opstats->stats[opcode]); + + /* Get the destination QP number. */ + qp_num = be32_to_cpu(packet->ohdr->bth[1]) & RVT_QPN_MASK; + lid = be16_to_cpu(hdr->lrh[1]); + if (unlikely((lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) && + (lid != be16_to_cpu(IB_LID_PERMISSIVE)))) { + struct rvt_mcast *mcast; + struct rvt_mcast_qp *p; + + if (lnh != HFI1_LRH_GRH) + goto drop; + mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid); + if (!mcast) + goto drop; + list_for_each_entry_rcu(p, &mcast->qp_list, list) { + packet->qp = p->qp; + spin_lock_irqsave(&packet->qp->r_lock, flags); + if (likely((qp_ok(opcode, packet)))) + opcode_handler_tbl[opcode](packet); + spin_unlock_irqrestore(&packet->qp->r_lock, flags); + } + /* + * Notify rvt_multicast_detach() if it is waiting for us + * to finish. + */ + if (atomic_dec_return(&mcast->refcount) <= 1) + wake_up(&mcast->wait); + } else { + rcu_read_lock(); + packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num); + if (!packet->qp) { + rcu_read_unlock(); + goto drop; + } + spin_lock_irqsave(&packet->qp->r_lock, flags); + if (likely((qp_ok(opcode, packet)))) + opcode_handler_tbl[opcode](packet); + spin_unlock_irqrestore(&packet->qp->r_lock, flags); + rcu_read_unlock(); + } + return; + +drop: + ibp->rvp.n_pkt_drops++; +} + +/* + * This is called from a timer to check for QPs + * which need kernel memory in order to send a packet. + */ +static void mem_timer(unsigned long data) +{ + struct hfi1_ibdev *dev = (struct hfi1_ibdev *)data; + struct list_head *list = &dev->memwait; + struct rvt_qp *qp = NULL; + struct iowait *wait; + unsigned long flags; + struct hfi1_qp_priv *priv; + + write_seqlock_irqsave(&dev->iowait_lock, flags); + if (!list_empty(list)) { + wait = list_first_entry(list, struct iowait, list); + qp = iowait_to_qp(wait); + priv = qp->priv; + list_del_init(&priv->s_iowait.list); + /* refcount held until actual wake up */ + if (!list_empty(list)) + mod_timer(&dev->mem_timer, jiffies + 1); + } + write_sequnlock_irqrestore(&dev->iowait_lock, flags); + + if (qp) + hfi1_qp_wakeup(qp, RVT_S_WAIT_KMEM); +} + +void update_sge(struct rvt_sge_state *ss, u32 length) +{ + struct rvt_sge *sge = &ss->sge; + + sge->vaddr += length; + sge->length -= length; + sge->sge_length -= length; + if (sge->sge_length == 0) { + if (--ss->num_sge) + *sge = *ss->sg_list++; + } else if (sge->length == 0 && sge->mr->lkey) { + if (++sge->n >= RVT_SEGSZ) { + if (++sge->m >= sge->mr->mapsz) + return; + sge->n = 0; + } + sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr; + sge->length = sge->mr->map[sge->m]->segs[sge->n].length; + } +} + +/* + * This is called with progress side lock held. + */ +/* New API */ +static void verbs_sdma_complete( + struct sdma_txreq *cookie, + int status) +{ + struct verbs_txreq *tx = + container_of(cookie, struct verbs_txreq, txreq); + struct rvt_qp *qp = tx->qp; + + spin_lock(&qp->s_lock); + if (tx->wqe) { + hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS); + } else if (qp->ibqp.qp_type == IB_QPT_RC) { + struct hfi1_ib_header *hdr; + + hdr = &tx->phdr.hdr; + hfi1_rc_send_complete(qp, hdr); + } + spin_unlock(&qp->s_lock); + + hfi1_put_txreq(tx); +} + +static int wait_kmem(struct hfi1_ibdev *dev, + struct rvt_qp *qp, + struct hfi1_pkt_state *ps) +{ + struct hfi1_qp_priv *priv = qp->priv; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&qp->s_lock, flags); + if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { + write_seqlock(&dev->iowait_lock); + list_add_tail(&ps->s_txreq->txreq.list, + &priv->s_iowait.tx_head); + if (list_empty(&priv->s_iowait.list)) { + if (list_empty(&dev->memwait)) + mod_timer(&dev->mem_timer, jiffies + 1); + qp->s_flags |= RVT_S_WAIT_KMEM; + list_add_tail(&priv->s_iowait.list, &dev->memwait); + trace_hfi1_qpsleep(qp, RVT_S_WAIT_KMEM); + atomic_inc(&qp->refcount); + } + write_sequnlock(&dev->iowait_lock); + qp->s_flags &= ~RVT_S_BUSY; + ret = -EBUSY; + } + spin_unlock_irqrestore(&qp->s_lock, flags); + + return ret; +} + +/* + * This routine calls txadds for each sg entry. + * + * Add failures will revert the sge cursor + */ +static noinline int build_verbs_ulp_payload( + struct sdma_engine *sde, + struct rvt_sge_state *ss, + u32 length, + struct verbs_txreq *tx) +{ + struct rvt_sge *sg_list = ss->sg_list; + struct rvt_sge sge = ss->sge; + u8 num_sge = ss->num_sge; + u32 len; + int ret = 0; + + while (length) { + len = ss->sge.length; + if (len > length) + len = length; + if (len > ss->sge.sge_length) + len = ss->sge.sge_length; + WARN_ON_ONCE(len == 0); + ret = sdma_txadd_kvaddr( + sde->dd, + &tx->txreq, + ss->sge.vaddr, + len); + if (ret) + goto bail_txadd; + update_sge(ss, len); + length -= len; + } + return ret; +bail_txadd: + /* unwind cursor */ + ss->sge = sge; + ss->num_sge = num_sge; + ss->sg_list = sg_list; + return ret; +} + +/* + * Build the number of DMA descriptors needed to send length bytes of data. + * + * NOTE: DMA mapping is held in the tx until completed in the ring or + * the tx desc is freed without having been submitted to the ring + * + * This routine ensures all the helper routine calls succeed. + */ +/* New API */ +static int build_verbs_tx_desc( + struct sdma_engine *sde, + struct rvt_sge_state *ss, + u32 length, + struct verbs_txreq *tx, + struct ahg_ib_header *ahdr, + u64 pbc) +{ + int ret = 0; + struct hfi1_pio_header *phdr = &tx->phdr; + u16 hdrbytes = tx->hdr_dwords << 2; + + if (!ahdr->ahgcount) { + ret = sdma_txinit_ahg( + &tx->txreq, + ahdr->tx_flags, + hdrbytes + length, + ahdr->ahgidx, + 0, + NULL, + 0, + verbs_sdma_complete); + if (ret) + goto bail_txadd; + phdr->pbc = cpu_to_le64(pbc); + ret = sdma_txadd_kvaddr( + sde->dd, + &tx->txreq, + phdr, + hdrbytes); + if (ret) + goto bail_txadd; + } else { + ret = sdma_txinit_ahg( + &tx->txreq, + ahdr->tx_flags, + length, + ahdr->ahgidx, + ahdr->ahgcount, + ahdr->ahgdesc, + hdrbytes, + verbs_sdma_complete); + if (ret) + goto bail_txadd; + } + + /* add the ulp payload - if any. ss can be NULL for acks */ + if (ss) + ret = build_verbs_ulp_payload(sde, ss, length, tx); +bail_txadd: + return ret; +} + +int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps, + u64 pbc) +{ + struct hfi1_qp_priv *priv = qp->priv; + struct ahg_ib_header *ahdr = priv->s_hdr; + u32 hdrwords = qp->s_hdrwords; + struct rvt_sge_state *ss = qp->s_cur_sge; + u32 len = qp->s_cur_size; + u32 plen = hdrwords + ((len + 3) >> 2) + 2; /* includes pbc */ + struct hfi1_ibdev *dev = ps->dev; + struct hfi1_pportdata *ppd = ps->ppd; + struct verbs_txreq *tx; + u64 pbc_flags = 0; + u8 sc5 = priv->s_sc; + + int ret; + + tx = ps->s_txreq; + if (!sdma_txreq_built(&tx->txreq)) { + if (likely(pbc == 0)) { + u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5); + /* No vl15 here */ + /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */ + pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT; + + pbc = create_pbc(ppd, + pbc_flags, + qp->srate_mbps, + vl, + plen); + } + tx->wqe = qp->s_wqe; + ret = build_verbs_tx_desc(tx->sde, ss, len, tx, ahdr, pbc); + if (unlikely(ret)) + goto bail_build; + } + ret = sdma_send_txreq(tx->sde, &priv->s_iowait, &tx->txreq); + if (unlikely(ret < 0)) { + if (ret == -ECOMM) + goto bail_ecomm; + return ret; + } + trace_sdma_output_ibhdr(dd_from_ibdev(qp->ibqp.device), + &ps->s_txreq->phdr.hdr); + return ret; + +bail_ecomm: + /* The current one got "sent" */ + return 0; +bail_build: + ret = wait_kmem(dev, qp, ps); + if (!ret) { + /* free txreq - bad state */ + hfi1_put_txreq(ps->s_txreq); + ps->s_txreq = NULL; + } + return ret; +} + +/* + * If we are now in the error state, return zero to flush the + * send work request. + */ +static int pio_wait(struct rvt_qp *qp, + struct send_context *sc, + struct hfi1_pkt_state *ps, + u32 flag) +{ + struct hfi1_qp_priv *priv = qp->priv; + struct hfi1_devdata *dd = sc->dd; + struct hfi1_ibdev *dev = &dd->verbs_dev; + unsigned long flags; + int ret = 0; + + /* + * Note that as soon as want_buffer() is called and + * possibly before it returns, sc_piobufavail() + * could be called. Therefore, put QP on the I/O wait list before + * enabling the PIO avail interrupt. + */ + spin_lock_irqsave(&qp->s_lock, flags); + if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { + write_seqlock(&dev->iowait_lock); + list_add_tail(&ps->s_txreq->txreq.list, + &priv->s_iowait.tx_head); + if (list_empty(&priv->s_iowait.list)) { + struct hfi1_ibdev *dev = &dd->verbs_dev; + int was_empty; + + dev->n_piowait += !!(flag & RVT_S_WAIT_PIO); + dev->n_piodrain += !!(flag & RVT_S_WAIT_PIO_DRAIN); + qp->s_flags |= flag; + was_empty = list_empty(&sc->piowait); + list_add_tail(&priv->s_iowait.list, &sc->piowait); + trace_hfi1_qpsleep(qp, RVT_S_WAIT_PIO); + atomic_inc(&qp->refcount); + /* counting: only call wantpiobuf_intr if first user */ + if (was_empty) + hfi1_sc_wantpiobuf_intr(sc, 1); + } + write_sequnlock(&dev->iowait_lock); + qp->s_flags &= ~RVT_S_BUSY; + ret = -EBUSY; + } + spin_unlock_irqrestore(&qp->s_lock, flags); + return ret; +} + +static void verbs_pio_complete(void *arg, int code) +{ + struct rvt_qp *qp = (struct rvt_qp *)arg; + struct hfi1_qp_priv *priv = qp->priv; + + if (iowait_pio_dec(&priv->s_iowait)) + iowait_drain_wakeup(&priv->s_iowait); +} + +int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps, + u64 pbc) +{ + struct hfi1_qp_priv *priv = qp->priv; + u32 hdrwords = qp->s_hdrwords; + struct rvt_sge_state *ss = qp->s_cur_sge; + u32 len = qp->s_cur_size; + u32 dwords = (len + 3) >> 2; + u32 plen = hdrwords + dwords + 2; /* includes pbc */ + struct hfi1_pportdata *ppd = ps->ppd; + u32 *hdr = (u32 *)&ps->s_txreq->phdr.hdr; + u64 pbc_flags = 0; + u8 sc5; + unsigned long flags = 0; + struct send_context *sc; + struct pio_buf *pbuf; + int wc_status = IB_WC_SUCCESS; + int ret = 0; + pio_release_cb cb = NULL; + + /* only RC/UC use complete */ + switch (qp->ibqp.qp_type) { + case IB_QPT_RC: + case IB_QPT_UC: + cb = verbs_pio_complete; + break; + default: + break; + } + + /* vl15 special case taken care of in ud.c */ + sc5 = priv->s_sc; + sc = ps->s_txreq->psc; + + if (likely(pbc == 0)) { + u8 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5); + /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */ + pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT; + pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen); + } + if (cb) + iowait_pio_inc(&priv->s_iowait); + pbuf = sc_buffer_alloc(sc, plen, cb, qp); + if (unlikely(!pbuf)) { + if (cb) + verbs_pio_complete(qp, 0); + if (ppd->host_link_state != HLS_UP_ACTIVE) { + /* + * If we have filled the PIO buffers to capacity and are + * not in an active state this request is not going to + * go out to so just complete it with an error or else a + * ULP or the core may be stuck waiting. + */ + hfi1_cdbg( + PIO, + "alloc failed. state not active, completing"); + wc_status = IB_WC_GENERAL_ERR; + goto pio_bail; + } else { + /* + * This is a normal occurrence. The PIO buffs are full + * up but we are still happily sending, well we could be + * so lets continue to queue the request. + */ + hfi1_cdbg(PIO, "alloc failed. state active, queuing"); + ret = pio_wait(qp, sc, ps, RVT_S_WAIT_PIO); + if (!ret) + /* txreq not queued - free */ + goto bail; + /* tx consumed in wait */ + return ret; + } + } + + if (len == 0) { + pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords); + } else { + if (ss) { + seg_pio_copy_start(pbuf, pbc, hdr, hdrwords * 4); + while (len) { + void *addr = ss->sge.vaddr; + u32 slen = ss->sge.length; + + if (slen > len) + slen = len; + update_sge(ss, slen); + seg_pio_copy_mid(pbuf, addr, slen); + len -= slen; + } + seg_pio_copy_end(pbuf); + } + } + + trace_pio_output_ibhdr(dd_from_ibdev(qp->ibqp.device), + &ps->s_txreq->phdr.hdr); + +pio_bail: + if (qp->s_wqe) { + spin_lock_irqsave(&qp->s_lock, flags); + hfi1_send_complete(qp, qp->s_wqe, wc_status); + spin_unlock_irqrestore(&qp->s_lock, flags); + } else if (qp->ibqp.qp_type == IB_QPT_RC) { + spin_lock_irqsave(&qp->s_lock, flags); + hfi1_rc_send_complete(qp, &ps->s_txreq->phdr.hdr); + spin_unlock_irqrestore(&qp->s_lock, flags); + } + + ret = 0; + +bail: + hfi1_put_txreq(ps->s_txreq); + return ret; +} + +/* + * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent + * being an entry from the partition key table), return 0 + * otherwise. Use the matching criteria for egress partition keys + * specified in the OPAv1 spec., section 9.1l.7. + */ +static inline int egress_pkey_matches_entry(u16 pkey, u16 ent) +{ + u16 mkey = pkey & PKEY_LOW_15_MASK; + u16 mentry = ent & PKEY_LOW_15_MASK; + + if (mkey == mentry) { + /* + * If pkey[15] is set (full partition member), + * is bit 15 in the corresponding table element + * clear (limited member)? + */ + if (pkey & PKEY_MEMBER_MASK) + return !!(ent & PKEY_MEMBER_MASK); + return 1; + } + return 0; +} + +/** + * egress_pkey_check - check P_KEY of a packet + * @ppd: Physical IB port data + * @lrh: Local route header + * @bth: Base transport header + * @sc5: SC for packet + * @s_pkey_index: It will be used for look up optimization for kernel contexts + * only. If it is negative value, then it means user contexts is calling this + * function. + * + * It checks if hdr's pkey is valid. + * + * Return: 0 on success, otherwise, 1 + */ +int egress_pkey_check(struct hfi1_pportdata *ppd, __be16 *lrh, __be32 *bth, + u8 sc5, int8_t s_pkey_index) +{ + struct hfi1_devdata *dd; + int i; + u16 pkey; + int is_user_ctxt_mechanism = (s_pkey_index < 0); + + if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT)) + return 0; + + pkey = (u16)be32_to_cpu(bth[0]); + + /* If SC15, pkey[0:14] must be 0x7fff */ + if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK)) + goto bad; + + /* Is the pkey = 0x0, or 0x8000? */ + if ((pkey & PKEY_LOW_15_MASK) == 0) + goto bad; + + /* + * For the kernel contexts only, if a qp is passed into the function, + * the most likely matching pkey has index qp->s_pkey_index + */ + if (!is_user_ctxt_mechanism && + egress_pkey_matches_entry(pkey, ppd->pkeys[s_pkey_index])) { + return 0; + } + + for (i = 0; i < MAX_PKEY_VALUES; i++) { + if (egress_pkey_matches_entry(pkey, ppd->pkeys[i])) + return 0; + } +bad: + /* + * For the user-context mechanism, the P_KEY check would only happen + * once per SDMA request, not once per packet. Therefore, there's no + * need to increment the counter for the user-context mechanism. + */ + if (!is_user_ctxt_mechanism) { + incr_cntr64(&ppd->port_xmit_constraint_errors); + dd = ppd->dd; + if (!(dd->err_info_xmit_constraint.status & + OPA_EI_STATUS_SMASK)) { + u16 slid = be16_to_cpu(lrh[3]); + + dd->err_info_xmit_constraint.status |= + OPA_EI_STATUS_SMASK; + dd->err_info_xmit_constraint.slid = slid; + dd->err_info_xmit_constraint.pkey = pkey; + } + } + return 1; +} + +/** + * get_send_routine - choose an egress routine + * + * Choose an egress routine based on QP type + * and size + */ +static inline send_routine get_send_routine(struct rvt_qp *qp, + struct verbs_txreq *tx) +{ + struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); + struct hfi1_qp_priv *priv = qp->priv; + struct hfi1_ib_header *h = &tx->phdr.hdr; + + if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA))) + return dd->process_pio_send; + switch (qp->ibqp.qp_type) { + case IB_QPT_SMI: + return dd->process_pio_send; + case IB_QPT_GSI: + case IB_QPT_UD: + break; + case IB_QPT_RC: + if (piothreshold && + qp->s_cur_size <= min(piothreshold, qp->pmtu) && + (BIT(get_opcode(h) & 0x1f) & rc_only_opcode) && + iowait_sdma_pending(&priv->s_iowait) == 0 && + !sdma_txreq_built(&tx->txreq)) + return dd->process_pio_send; + break; + case IB_QPT_UC: + if (piothreshold && + qp->s_cur_size <= min(piothreshold, qp->pmtu) && + (BIT(get_opcode(h) & 0x1f) & uc_only_opcode) && + iowait_sdma_pending(&priv->s_iowait) == 0 && + !sdma_txreq_built(&tx->txreq)) + return dd->process_pio_send; + break; + default: + break; + } + return dd->process_dma_send; +} + +/** + * hfi1_verbs_send - send a packet + * @qp: the QP to send on + * @ps: the state of the packet to send + * + * Return zero if packet is sent or queued OK. + * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise. + */ +int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps) +{ + struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); + struct hfi1_qp_priv *priv = qp->priv; + struct hfi1_other_headers *ohdr; + struct hfi1_ib_header *hdr; + send_routine sr; + int ret; + u8 lnh; + + hdr = &ps->s_txreq->phdr.hdr; + /* locate the pkey within the headers */ + lnh = be16_to_cpu(hdr->lrh[0]) & 3; + if (lnh == HFI1_LRH_GRH) + ohdr = &hdr->u.l.oth; + else + ohdr = &hdr->u.oth; + + sr = get_send_routine(qp, ps->s_txreq); + ret = egress_pkey_check(dd->pport, + hdr->lrh, + ohdr->bth, + priv->s_sc, + qp->s_pkey_index); + if (unlikely(ret)) { + /* + * The value we are returning here does not get propagated to + * the verbs caller. Thus we need to complete the request with + * error otherwise the caller could be sitting waiting on the + * completion event. Only do this for PIO. SDMA has its own + * mechanism for handling the errors. So for SDMA we can just + * return. + */ + if (sr == dd->process_pio_send) { + unsigned long flags; + + hfi1_cdbg(PIO, "%s() Failed. Completing with err", + __func__); + spin_lock_irqsave(&qp->s_lock, flags); + hfi1_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR); + spin_unlock_irqrestore(&qp->s_lock, flags); + } + return -EINVAL; + } + if (sr == dd->process_dma_send && iowait_pio_pending(&priv->s_iowait)) + return pio_wait(qp, + ps->s_txreq->psc, + ps, + RVT_S_WAIT_PIO_DRAIN); + return sr(qp, ps, 0); +} + +/** + * hfi1_fill_device_attr - Fill in rvt dev info device attributes. + * @dd: the device data structure + */ +static void hfi1_fill_device_attr(struct hfi1_devdata *dd) +{ + struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; + + memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props)); + + rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR | + IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT | + IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN | + IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE; + rdi->dparms.props.page_size_cap = PAGE_SIZE; + rdi->dparms.props.vendor_id = dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3; + rdi->dparms.props.vendor_part_id = dd->pcidev->device; + rdi->dparms.props.hw_ver = dd->minrev; + rdi->dparms.props.sys_image_guid = ib_hfi1_sys_image_guid; + rdi->dparms.props.max_mr_size = ~0ULL; + rdi->dparms.props.max_qp = hfi1_max_qps; + rdi->dparms.props.max_qp_wr = hfi1_max_qp_wrs; + rdi->dparms.props.max_sge = hfi1_max_sges; + rdi->dparms.props.max_sge_rd = hfi1_max_sges; + rdi->dparms.props.max_cq = hfi1_max_cqs; + rdi->dparms.props.max_ah = hfi1_max_ahs; + rdi->dparms.props.max_cqe = hfi1_max_cqes; + rdi->dparms.props.max_mr = rdi->lkey_table.max; + rdi->dparms.props.max_fmr = rdi->lkey_table.max; + rdi->dparms.props.max_map_per_fmr = 32767; + rdi->dparms.props.max_pd = hfi1_max_pds; + rdi->dparms.props.max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC; + rdi->dparms.props.max_qp_init_rd_atom = 255; + rdi->dparms.props.max_srq = hfi1_max_srqs; + rdi->dparms.props.max_srq_wr = hfi1_max_srq_wrs; + rdi->dparms.props.max_srq_sge = hfi1_max_srq_sges; + rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB; + rdi->dparms.props.max_pkeys = hfi1_get_npkeys(dd); + rdi->dparms.props.max_mcast_grp = hfi1_max_mcast_grps; + rdi->dparms.props.max_mcast_qp_attach = hfi1_max_mcast_qp_attached; + rdi->dparms.props.max_total_mcast_qp_attach = + rdi->dparms.props.max_mcast_qp_attach * + rdi->dparms.props.max_mcast_grp; +} + +static inline u16 opa_speed_to_ib(u16 in) +{ + u16 out = 0; + + if (in & OPA_LINK_SPEED_25G) + out |= IB_SPEED_EDR; + if (in & OPA_LINK_SPEED_12_5G) + out |= IB_SPEED_FDR; + + return out; +} + +/* + * Convert a single OPA link width (no multiple flags) to an IB value. + * A zero OPA link width means link down, which means the IB width value + * is a don't care. + */ +static inline u16 opa_width_to_ib(u16 in) +{ + switch (in) { + case OPA_LINK_WIDTH_1X: + /* map 2x and 3x to 1x as they don't exist in IB */ + case OPA_LINK_WIDTH_2X: + case OPA_LINK_WIDTH_3X: + return IB_WIDTH_1X; + default: /* link down or unknown, return our largest width */ + case OPA_LINK_WIDTH_4X: + return IB_WIDTH_4X; + } +} + +static int query_port(struct rvt_dev_info *rdi, u8 port_num, + struct ib_port_attr *props) +{ + struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi); + struct hfi1_devdata *dd = dd_from_dev(verbs_dev); + struct hfi1_pportdata *ppd = &dd->pport[port_num - 1]; + u16 lid = ppd->lid; + + props->lid = lid ? lid : 0; + props->lmc = ppd->lmc; + /* OPA logical states match IB logical states */ + props->state = driver_lstate(ppd); + props->phys_state = hfi1_ibphys_portstate(ppd); + props->gid_tbl_len = HFI1_GUIDS_PER_PORT; + props->active_width = (u8)opa_width_to_ib(ppd->link_width_active); + /* see rate_show() in ib core/sysfs.c */ + props->active_speed = (u8)opa_speed_to_ib(ppd->link_speed_active); + props->max_vl_num = ppd->vls_supported; + + /* Once we are a "first class" citizen and have added the OPA MTUs to + * the core we can advertise the larger MTU enum to the ULPs, for now + * advertise only 4K. + * + * Those applications which are either OPA aware or pass the MTU enum + * from the Path Records to us will get the new 8k MTU. Those that + * attempt to process the MTU enum may fail in various ways. + */ + props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ? + 4096 : hfi1_max_mtu), IB_MTU_4096); + props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu : + mtu_to_enum(ppd->ibmtu, IB_MTU_2048); + + return 0; +} + +static int modify_device(struct ib_device *device, + int device_modify_mask, + struct ib_device_modify *device_modify) +{ + struct hfi1_devdata *dd = dd_from_ibdev(device); + unsigned i; + int ret; + + if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | + IB_DEVICE_MODIFY_NODE_DESC)) { + ret = -EOPNOTSUPP; + goto bail; + } + + if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) { + memcpy(device->node_desc, device_modify->node_desc, 64); + for (i = 0; i < dd->num_pports; i++) { + struct hfi1_ibport *ibp = &dd->pport[i].ibport_data; + + hfi1_node_desc_chg(ibp); + } + } + + if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) { + ib_hfi1_sys_image_guid = + cpu_to_be64(device_modify->sys_image_guid); + for (i = 0; i < dd->num_pports; i++) { + struct hfi1_ibport *ibp = &dd->pport[i].ibport_data; + + hfi1_sys_guid_chg(ibp); + } + } + + ret = 0; + +bail: + return ret; +} + +static int shut_down_port(struct rvt_dev_info *rdi, u8 port_num) +{ + struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi); + struct hfi1_devdata *dd = dd_from_dev(verbs_dev); + struct hfi1_pportdata *ppd = &dd->pport[port_num - 1]; + int ret; + + set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0, + OPA_LINKDOWN_REASON_UNKNOWN); + ret = set_link_state(ppd, HLS_DN_DOWNDEF); + return ret; +} + +static int hfi1_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp, + int guid_index, __be64 *guid) +{ + struct hfi1_ibport *ibp = container_of(rvp, struct hfi1_ibport, rvp); + struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); + + if (guid_index == 0) + *guid = cpu_to_be64(ppd->guid); + else if (guid_index < HFI1_GUIDS_PER_PORT) + *guid = ibp->guids[guid_index - 1]; + else + return -EINVAL; + + return 0; +} + +/* + * convert ah port,sl to sc + */ +u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah) +{ + struct hfi1_ibport *ibp = to_iport(ibdev, ah->port_num); + + return ibp->sl_to_sc[ah->sl]; +} + +static int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr) +{ + struct hfi1_ibport *ibp; + struct hfi1_pportdata *ppd; + struct hfi1_devdata *dd; + u8 sc5; + + /* test the mapping for validity */ + ibp = to_iport(ibdev, ah_attr->port_num); + ppd = ppd_from_ibp(ibp); + sc5 = ibp->sl_to_sc[ah_attr->sl]; + dd = dd_from_ppd(ppd); + if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf) + return -EINVAL; + return 0; +} + +static void hfi1_notify_new_ah(struct ib_device *ibdev, + struct ib_ah_attr *ah_attr, + struct rvt_ah *ah) +{ + struct hfi1_ibport *ibp; + struct hfi1_pportdata *ppd; + struct hfi1_devdata *dd; + u8 sc5; + + /* + * Do not trust reading anything from rvt_ah at this point as it is not + * done being setup. We can however modify things which we need to set. + */ + + ibp = to_iport(ibdev, ah_attr->port_num); + ppd = ppd_from_ibp(ibp); + sc5 = ibp->sl_to_sc[ah->attr.sl]; + dd = dd_from_ppd(ppd); + ah->vl = sc_to_vlt(dd, sc5); + if (ah->vl < num_vls || ah->vl == 15) + ah->log_pmtu = ilog2(dd->vld[ah->vl].mtu); +} + +struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid) +{ + struct ib_ah_attr attr; + struct ib_ah *ah = ERR_PTR(-EINVAL); + struct rvt_qp *qp0; + + memset(&attr, 0, sizeof(attr)); + attr.dlid = dlid; + attr.port_num = ppd_from_ibp(ibp)->port; + rcu_read_lock(); + qp0 = rcu_dereference(ibp->rvp.qp[0]); + if (qp0) + ah = ib_create_ah(qp0->ibqp.pd, &attr); + rcu_read_unlock(); + return ah; +} + +/** + * hfi1_get_npkeys - return the size of the PKEY table for context 0 + * @dd: the hfi1_ib device + */ +unsigned hfi1_get_npkeys(struct hfi1_devdata *dd) +{ + return ARRAY_SIZE(dd->pport[0].pkeys); +} + +static void init_ibport(struct hfi1_pportdata *ppd) +{ + struct hfi1_ibport *ibp = &ppd->ibport_data; + size_t sz = ARRAY_SIZE(ibp->sl_to_sc); + int i; + + for (i = 0; i < sz; i++) { + ibp->sl_to_sc[i] = i; + ibp->sc_to_sl[i] = i; + } + + spin_lock_init(&ibp->rvp.lock); + /* Set the prefix to the default value (see ch. 4.1.1) */ + ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX; + ibp->rvp.sm_lid = 0; + /* Below should only set bits defined in OPA PortInfo.CapabilityMask */ + ibp->rvp.port_cap_flags = IB_PORT_AUTO_MIGR_SUP | + IB_PORT_CAP_MASK_NOTICE_SUP; + ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA; + ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA; + ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS; + ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS; + ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT; + + RCU_INIT_POINTER(ibp->rvp.qp[0], NULL); + RCU_INIT_POINTER(ibp->rvp.qp[1], NULL); +} + +/** + * hfi1_register_ib_device - register our device with the infiniband core + * @dd: the device data structure + * Return 0 if successful, errno if unsuccessful. + */ +int hfi1_register_ib_device(struct hfi1_devdata *dd) +{ + struct hfi1_ibdev *dev = &dd->verbs_dev; + struct ib_device *ibdev = &dev->rdi.ibdev; + struct hfi1_pportdata *ppd = dd->pport; + unsigned i; + int ret; + size_t lcpysz = IB_DEVICE_NAME_MAX; + + for (i = 0; i < dd->num_pports; i++) + init_ibport(ppd + i); + + /* Only need to initialize non-zero fields. */ + + setup_timer(&dev->mem_timer, mem_timer, (unsigned long)dev); + + seqlock_init(&dev->iowait_lock); + INIT_LIST_HEAD(&dev->txwait); + INIT_LIST_HEAD(&dev->memwait); + + ret = verbs_txreq_init(dev); + if (ret) + goto err_verbs_txreq; + + /* + * The system image GUID is supposed to be the same for all + * HFIs in a single system but since there can be other + * device types in the system, we can't be sure this is unique. + */ + if (!ib_hfi1_sys_image_guid) + ib_hfi1_sys_image_guid = cpu_to_be64(ppd->guid); + lcpysz = strlcpy(ibdev->name, class_name(), lcpysz); + strlcpy(ibdev->name + lcpysz, "_%d", IB_DEVICE_NAME_MAX - lcpysz); + ibdev->owner = THIS_MODULE; + ibdev->node_guid = cpu_to_be64(ppd->guid); + ibdev->phys_port_cnt = dd->num_pports; + ibdev->dma_device = &dd->pcidev->dev; + ibdev->modify_device = modify_device; + + /* keep process mad in the driver */ + ibdev->process_mad = hfi1_process_mad; + + strncpy(ibdev->node_desc, init_utsname()->nodename, + sizeof(ibdev->node_desc)); + + /* + * Fill in rvt info object. + */ + dd->verbs_dev.rdi.driver_f.port_callback = hfi1_create_port_files; + dd->verbs_dev.rdi.driver_f.get_card_name = get_card_name; + dd->verbs_dev.rdi.driver_f.get_pci_dev = get_pci_dev; + dd->verbs_dev.rdi.driver_f.check_ah = hfi1_check_ah; + dd->verbs_dev.rdi.driver_f.notify_new_ah = hfi1_notify_new_ah; + dd->verbs_dev.rdi.driver_f.get_guid_be = hfi1_get_guid_be; + dd->verbs_dev.rdi.driver_f.query_port_state = query_port; + dd->verbs_dev.rdi.driver_f.shut_down_port = shut_down_port; + dd->verbs_dev.rdi.driver_f.cap_mask_chg = hfi1_cap_mask_chg; + /* + * Fill in rvt info device attributes. + */ + hfi1_fill_device_attr(dd); + + /* queue pair */ + dd->verbs_dev.rdi.dparms.qp_table_size = hfi1_qp_table_size; + dd->verbs_dev.rdi.dparms.qpn_start = 0; + dd->verbs_dev.rdi.dparms.qpn_inc = 1; + dd->verbs_dev.rdi.dparms.qos_shift = dd->qos_shift; + dd->verbs_dev.rdi.dparms.qpn_res_start = kdeth_qp << 16; + dd->verbs_dev.rdi.dparms.qpn_res_end = + dd->verbs_dev.rdi.dparms.qpn_res_start + 65535; + dd->verbs_dev.rdi.dparms.max_rdma_atomic = HFI1_MAX_RDMA_ATOMIC; + dd->verbs_dev.rdi.dparms.psn_mask = PSN_MASK; + dd->verbs_dev.rdi.dparms.psn_shift = PSN_SHIFT; + dd->verbs_dev.rdi.dparms.psn_modify_mask = PSN_MODIFY_MASK; + dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_INTEL_OPA; + dd->verbs_dev.rdi.dparms.max_mad_size = OPA_MGMT_MAD_SIZE; + + dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qp_priv_alloc; + dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free; + dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps; + dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset; + dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send; + dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send; + dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send; + dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr; + dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp; + dd->verbs_dev.rdi.driver_f.flush_qp_waiters = flush_qp_waiters; + dd->verbs_dev.rdi.driver_f.stop_send_queue = stop_send_queue; + dd->verbs_dev.rdi.driver_f.quiesce_qp = quiesce_qp; + dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp; + dd->verbs_dev.rdi.driver_f.mtu_from_qp = mtu_from_qp; + dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = mtu_to_path_mtu; + dd->verbs_dev.rdi.driver_f.check_modify_qp = hfi1_check_modify_qp; + dd->verbs_dev.rdi.driver_f.modify_qp = hfi1_modify_qp; + dd->verbs_dev.rdi.driver_f.check_send_wqe = hfi1_check_send_wqe; + + /* completeion queue */ + snprintf(dd->verbs_dev.rdi.dparms.cq_name, + sizeof(dd->verbs_dev.rdi.dparms.cq_name), + "hfi1_cq%d", dd->unit); + dd->verbs_dev.rdi.dparms.node = dd->node; + + /* misc settings */ + dd->verbs_dev.rdi.flags = 0; /* Let rdmavt handle it all */ + dd->verbs_dev.rdi.dparms.lkey_table_size = hfi1_lkey_table_size; + dd->verbs_dev.rdi.dparms.nports = dd->num_pports; + dd->verbs_dev.rdi.dparms.npkeys = hfi1_get_npkeys(dd); + + ppd = dd->pport; + for (i = 0; i < dd->num_pports; i++, ppd++) + rvt_init_port(&dd->verbs_dev.rdi, + &ppd->ibport_data.rvp, + i, + ppd->pkeys); + + ret = rvt_register_device(&dd->verbs_dev.rdi); + if (ret) + goto err_verbs_txreq; + + ret = hfi1_verbs_register_sysfs(dd); + if (ret) + goto err_class; + + return ret; + +err_class: + rvt_unregister_device(&dd->verbs_dev.rdi); +err_verbs_txreq: + verbs_txreq_exit(dev); + dd_dev_err(dd, "cannot register verbs: %d!\n", -ret); + return ret; +} + +void hfi1_unregister_ib_device(struct hfi1_devdata *dd) +{ + struct hfi1_ibdev *dev = &dd->verbs_dev; + + hfi1_verbs_unregister_sysfs(dd); + + rvt_unregister_device(&dd->verbs_dev.rdi); + + if (!list_empty(&dev->txwait)) + dd_dev_err(dd, "txwait list not empty!\n"); + if (!list_empty(&dev->memwait)) + dd_dev_err(dd, "memwait list not empty!\n"); + + del_timer_sync(&dev->mem_timer); + verbs_txreq_exit(dev); +} + +void hfi1_cnp_rcv(struct hfi1_packet *packet) +{ + struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data; + struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); + struct hfi1_ib_header *hdr = packet->hdr; + struct rvt_qp *qp = packet->qp; + u32 lqpn, rqpn = 0; + u16 rlid = 0; + u8 sl, sc5, sc4_bit, svc_type; + bool sc4_set = has_sc4_bit(packet); + + switch (packet->qp->ibqp.qp_type) { + case IB_QPT_UC: + rlid = qp->remote_ah_attr.dlid; + rqpn = qp->remote_qpn; + svc_type = IB_CC_SVCTYPE_UC; + break; + case IB_QPT_RC: + rlid = qp->remote_ah_attr.dlid; + rqpn = qp->remote_qpn; + svc_type = IB_CC_SVCTYPE_RC; + break; + case IB_QPT_SMI: + case IB_QPT_GSI: + case IB_QPT_UD: + svc_type = IB_CC_SVCTYPE_UD; + break; + default: + ibp->rvp.n_pkt_drops++; + return; + } + + sc4_bit = sc4_set << 4; + sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf; + sc5 |= sc4_bit; + sl = ibp->sc_to_sl[sc5]; + lqpn = qp->ibqp.qp_num; + + process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type); +} |