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freebsd-skq/sys/dev/mlx4/mlx4_ib/mlx4_ib_qp.c
hselasky 5e41da7ccd Move the ConnectX-3 and ConnectX-2 driver from sys/ofed into sys/dev/mlx4 
like other PCI network drivers. The sys/ofed directory is now mainly
reserved for generic infiniband code, with exception of the mthca driver.

- Add new manual page, mlx4en(4), describing how to configure and load
mlx4en.

- All relevant driver C-files are now prefixed mlx4, mlx4_en and
mlx4_ib respectivly to avoid object filename collisions when compiling
the kernel. This also fixes an issue with proper dependency file
generation for the C-files in question.

- Device mlxen is now device mlx4en and depends on device mlx4, see
mlx4en(4). Only the network device name remains unchanged.

- The mlx4 and mlx4en modules are now built by default on i386 and
amd64 targets. Only building the mlx4ib module depends on
WITH_OFED=YES .

Sponsored by:	Mellanox Technologies
2016-09-30 08:23:06 +00:00

3688 lines
105 KiB
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/*
* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/bitops.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_mad.h>
#include <dev/mlx4/qp.h>
#include <dev/mlx4/driver.h>
#include <linux/io.h>
#include "mlx4_ib.h"
#include "user.h"
#define asm __asm
enum {
MLX4_IB_ACK_REQ_FREQ = 8,
};
enum {
MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
MLX4_IB_LINK_TYPE_IB = 0,
MLX4_IB_LINK_TYPE_ETH = 1
};
enum {
/*
* Largest possible UD header: send with GRH and immediate
* data plus 18 bytes for an Ethernet header with VLAN/802.1Q
* tag. (LRH would only use 8 bytes, so Ethernet is the
* biggest case)
*/
MLX4_IB_UD_HEADER_SIZE = 82,
MLX4_IB_LSO_HEADER_SPARE = 128,
};
enum {
MLX4_IB_IBOE_ETHERTYPE = 0x8915
};
struct mlx4_ib_sqp {
struct mlx4_ib_qp qp;
int pkey_index;
u32 qkey;
u32 send_psn;
struct ib_ud_header ud_header;
u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
};
enum {
MLX4_IB_MIN_SQ_STRIDE = 6,
MLX4_IB_CACHE_LINE_SIZE = 64,
};
enum {
MLX4_RAW_QP_MTU = 7,
MLX4_RAW_QP_MSGMAX = 31,
};
static const __be32 mlx4_ib_opcode[] = {
[IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
[IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
[IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
[IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
[IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
[IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
[IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
[IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
[IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
[IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
[IB_WR_FAST_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
[IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
[IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
[IB_WR_BIND_MW] = cpu_to_be32(
MLX4_OPCODE_BIND_MW),
};
#ifndef wc_wmb
#if defined(__i386__)
#define wc_wmb() asm volatile("lock; addl $0,0(%%esp) " ::: "memory")
#elif defined(__x86_64__)
#define wc_wmb() asm volatile("sfence" ::: "memory")
#elif defined(__ia64__)
#define wc_wmb() asm volatile("fwb" ::: "memory")
#else
#define wc_wmb() wmb()
#endif
#endif
static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
{
return container_of(mqp, struct mlx4_ib_sqp, qp);
}
static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
{
if (!mlx4_is_master(dev->dev))
return 0;
return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
8 * MLX4_MFUNC_MAX;
}
static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
{
int proxy_sqp = 0;
int real_sqp = 0;
int i;
/* PPF or Native -- real SQP */
real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
if (real_sqp)
return 1;
/* VF or PF -- proxy SQP */
if (mlx4_is_mfunc(dev->dev)) {
for (i = 0; i < dev->dev->caps.num_ports; i++) {
if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i] ||
qp->mqp.qpn == dev->dev->caps.qp1_proxy[i]) {
proxy_sqp = 1;
break;
}
}
}
return proxy_sqp;
}
/* used for INIT/CLOSE port logic */
static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
{
int proxy_qp0 = 0;
int real_qp0 = 0;
int i;
/* PPF or Native -- real QP0 */
real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
if (real_qp0)
return 1;
/* VF or PF -- proxy QP0 */
if (mlx4_is_mfunc(dev->dev)) {
for (i = 0; i < dev->dev->caps.num_ports; i++) {
if (qp->mqp.qpn == dev->dev->caps.qp0_proxy[i]) {
proxy_qp0 = 1;
break;
}
}
}
return proxy_qp0;
}
static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
{
return mlx4_buf_offset(&qp->buf, offset);
}
static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
{
return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
}
static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
{
return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
}
/*
* Stamp a SQ WQE so that it is invalid if prefetched by marking the
* first four bytes of every 64 byte chunk with
* 0x7FFFFFF | (invalid_ownership_value << 31).
*
* When the max work request size is less than or equal to the WQE
* basic block size, as an optimization, we can stamp all WQEs with
* 0xffffffff, and skip the very first chunk of each WQE.
*/
static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n, int size)
{
__be32 *wqe;
int i;
int s;
int ind;
void *buf;
__be32 stamp;
struct mlx4_wqe_ctrl_seg *ctrl;
if (qp->sq_max_wqes_per_wr > 1) {
s = roundup(size, 1U << qp->sq.wqe_shift);
for (i = 0; i < s; i += 64) {
ind = (i >> qp->sq.wqe_shift) + n;
stamp = ind & qp->sq.wqe_cnt ? cpu_to_be32(0x7fffffff) :
cpu_to_be32(0xffffffff);
buf = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
wqe = buf + (i & ((1 << qp->sq.wqe_shift) - 1));
*wqe = stamp;
}
} else {
ctrl = buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
s = (ctrl->fence_size & 0x3f) << 4;
for (i = 64; i < s; i += 64) {
wqe = buf + i;
*wqe = cpu_to_be32(0xffffffff);
}
}
}
static void post_nop_wqe(struct mlx4_ib_qp *qp, int n, int size)
{
struct mlx4_wqe_ctrl_seg *ctrl;
struct mlx4_wqe_inline_seg *inl;
void *wqe;
int s;
ctrl = wqe = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
s = sizeof(struct mlx4_wqe_ctrl_seg);
if (qp->ibqp.qp_type == IB_QPT_UD) {
struct mlx4_wqe_datagram_seg *dgram = wqe + sizeof *ctrl;
struct mlx4_av *av = (struct mlx4_av *)dgram->av;
memset(dgram, 0, sizeof *dgram);
av->port_pd = cpu_to_be32((qp->port << 24) | to_mpd(qp->ibqp.pd)->pdn);
s += sizeof(struct mlx4_wqe_datagram_seg);
}
/* Pad the remainder of the WQE with an inline data segment. */
if (size > s) {
inl = wqe + s;
inl->byte_count = cpu_to_be32(1 << 31 | (size - s - sizeof *inl));
}
ctrl->srcrb_flags = 0;
ctrl->fence_size = size / 16;
/*
* Make sure descriptor is fully written before setting ownership bit
* (because HW can start executing as soon as we do).
*/
wmb();
ctrl->owner_opcode = cpu_to_be32(MLX4_OPCODE_NOP | MLX4_WQE_CTRL_NEC) |
(n & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0);
stamp_send_wqe(qp, n + qp->sq_spare_wqes, size);
}
/* Post NOP WQE to prevent wrap-around in the middle of WR */
static inline unsigned pad_wraparound(struct mlx4_ib_qp *qp, int ind)
{
unsigned s = qp->sq.wqe_cnt - (ind & (qp->sq.wqe_cnt - 1));
if (unlikely(s < qp->sq_max_wqes_per_wr)) {
post_nop_wqe(qp, ind, s << qp->sq.wqe_shift);
ind += s;
}
return ind;
}
static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
{
struct ib_event event;
struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
if (type == MLX4_EVENT_TYPE_PATH_MIG)
to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
if (ibqp->event_handler) {
event.device = ibqp->device;
event.element.qp = ibqp;
switch (type) {
case MLX4_EVENT_TYPE_PATH_MIG:
event.event = IB_EVENT_PATH_MIG;
break;
case MLX4_EVENT_TYPE_COMM_EST:
event.event = IB_EVENT_COMM_EST;
break;
case MLX4_EVENT_TYPE_SQ_DRAINED:
event.event = IB_EVENT_SQ_DRAINED;
break;
case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
event.event = IB_EVENT_QP_LAST_WQE_REACHED;
break;
case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
event.event = IB_EVENT_QP_FATAL;
break;
case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
event.event = IB_EVENT_PATH_MIG_ERR;
break;
case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
event.event = IB_EVENT_QP_REQ_ERR;
break;
case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
event.event = IB_EVENT_QP_ACCESS_ERR;
break;
default:
pr_warn("Unexpected event type %d "
"on QP %06x\n", type, qp->qpn);
return;
}
ibqp->event_handler(&event, ibqp->qp_context);
}
}
static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
{
/*
* UD WQEs must have a datagram segment.
* RC and UC WQEs might have a remote address segment.
* MLX WQEs need two extra inline data segments (for the UD
* header and space for the ICRC).
*/
switch (type) {
case MLX4_IB_QPT_UD:
return sizeof (struct mlx4_wqe_ctrl_seg) +
sizeof (struct mlx4_wqe_datagram_seg) +
((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
case MLX4_IB_QPT_PROXY_SMI_OWNER:
case MLX4_IB_QPT_PROXY_SMI:
case MLX4_IB_QPT_PROXY_GSI:
return sizeof (struct mlx4_wqe_ctrl_seg) +
sizeof (struct mlx4_wqe_datagram_seg) + 64;
case MLX4_IB_QPT_TUN_SMI_OWNER:
case MLX4_IB_QPT_TUN_GSI:
return sizeof (struct mlx4_wqe_ctrl_seg) +
sizeof (struct mlx4_wqe_datagram_seg);
case MLX4_IB_QPT_UC:
return sizeof (struct mlx4_wqe_ctrl_seg) +
sizeof (struct mlx4_wqe_raddr_seg);
case MLX4_IB_QPT_RC:
return sizeof (struct mlx4_wqe_ctrl_seg) +
sizeof (struct mlx4_wqe_masked_atomic_seg) +
sizeof (struct mlx4_wqe_raddr_seg);
case MLX4_IB_QPT_SMI:
case MLX4_IB_QPT_GSI:
return sizeof (struct mlx4_wqe_ctrl_seg) +
ALIGN(MLX4_IB_UD_HEADER_SIZE +
DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
MLX4_INLINE_ALIGN) *
sizeof (struct mlx4_wqe_inline_seg),
sizeof (struct mlx4_wqe_data_seg)) +
ALIGN(4 +
sizeof (struct mlx4_wqe_inline_seg),
sizeof (struct mlx4_wqe_data_seg));
default:
return sizeof (struct mlx4_wqe_ctrl_seg);
}
}
static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
int is_user, int has_rq, struct mlx4_ib_qp *qp)
{
/* Sanity check RQ size before proceeding */
if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
return -EINVAL;
if (!has_rq) {
if (cap->max_recv_wr)
return -EINVAL;
qp->rq.wqe_cnt = qp->rq.max_gs = 0;
} else {
/* HW requires >= 1 RQ entry with >= 1 gather entry */
if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge))
return -EINVAL;
qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
qp->rq.wqe_shift = ilog2(qp->rq.max_gs * sizeof (struct mlx4_wqe_data_seg));
}
/* leave userspace return values as they were, so as not to break ABI */
if (is_user) {
cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
cap->max_recv_sge = qp->rq.max_gs;
} else {
cap->max_recv_wr = qp->rq.max_post =
min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
cap->max_recv_sge = min(qp->rq.max_gs,
min(dev->dev->caps.max_sq_sg,
dev->dev->caps.max_rq_sg));
}
return 0;
}
static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
{
int s;
/* Sanity check SQ size before proceeding */
if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
return -EINVAL;
/*
* For MLX transport we need 2 extra S/G entries:
* one for the header and one for the checksum at the end
*/
if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
return -EINVAL;
s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
send_wqe_overhead(type, qp->flags);
if (s > dev->dev->caps.max_sq_desc_sz)
return -EINVAL;
/*
* Hermon supports shrinking WQEs, such that a single work
* request can include multiple units of 1 << wqe_shift. This
* way, work requests can differ in size, and do not have to
* be a power of 2 in size, saving memory and speeding up send
* WR posting. Unfortunately, if we do this then the
* wqe_index field in CQEs can't be used to look up the WR ID
* anymore, so we do this only if selective signaling is off.
*
* Further, on 32-bit platforms, we can't use vmap() to make
* the QP buffer virtually contiguous. Thus we have to use
* constant-sized WRs to make sure a WR is always fully within
* a single page-sized chunk.
*
* Finally, we use NOP work requests to pad the end of the
* work queue, to avoid wrap-around in the middle of WR. We
* set NEC bit to avoid getting completions with error for
* these NOP WRs, but since NEC is only supported starting
* with firmware 2.2.232, we use constant-sized WRs for older
* firmware.
*
* And, since MLX QPs only support SEND, we use constant-sized
* WRs in this case.
*
* We look for the smallest value of wqe_shift such that the
* resulting number of wqes does not exceed device
* capabilities.
*
* We set WQE size to at least 64 bytes, this way stamping
* invalidates each WQE.
*/
if (dev->dev->caps.fw_ver >= MLX4_FW_VER_WQE_CTRL_NEC &&
qp->sq_signal_bits && BITS_PER_LONG == 64 &&
type != MLX4_IB_QPT_SMI && type != MLX4_IB_QPT_GSI &&
!(type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_PROXY_SMI |
MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER)))
qp->sq.wqe_shift = ilog2(64);
else
qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
for (;;) {
qp->sq_max_wqes_per_wr = DIV_ROUND_UP(s, 1U << qp->sq.wqe_shift);
/*
* We need to leave 2 KB + 1 WR of headroom in the SQ to
* allow HW to prefetch.
*/
qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + qp->sq_max_wqes_per_wr;
qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr *
qp->sq_max_wqes_per_wr +
qp->sq_spare_wqes);
if (qp->sq.wqe_cnt <= dev->dev->caps.max_wqes)
break;
if (qp->sq_max_wqes_per_wr <= 1)
return -EINVAL;
++qp->sq.wqe_shift;
}
qp->sq.max_gs = (min(dev->dev->caps.max_sq_desc_sz,
(qp->sq_max_wqes_per_wr << qp->sq.wqe_shift)) -
send_wqe_overhead(type, qp->flags)) /
sizeof (struct mlx4_wqe_data_seg);
qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
(qp->sq.wqe_cnt << qp->sq.wqe_shift);
if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
qp->rq.offset = 0;
qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
} else {
qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
qp->sq.offset = 0;
}
cap->max_send_wr = qp->sq.max_post =
(qp->sq.wqe_cnt - qp->sq_spare_wqes) / qp->sq_max_wqes_per_wr;
cap->max_send_sge = min(qp->sq.max_gs,
min(dev->dev->caps.max_sq_sg,
dev->dev->caps.max_rq_sg));
qp->max_inline_data = cap->max_inline_data;
return 0;
}
static int set_user_sq_size(struct mlx4_ib_dev *dev,
struct mlx4_ib_qp *qp,
struct mlx4_ib_create_qp *ucmd)
{
/* Sanity check SQ size before proceeding */
if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes ||
ucmd->log_sq_stride >
ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
return -EINVAL;
qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
qp->sq.wqe_shift = ucmd->log_sq_stride;
qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
(qp->sq.wqe_cnt << qp->sq.wqe_shift);
return 0;
}
static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
{
int i;
qp->sqp_proxy_rcv =
kmalloc(sizeof (struct mlx4_ib_buf) * qp->rq.wqe_cnt,
GFP_KERNEL);
if (!qp->sqp_proxy_rcv)
return -ENOMEM;
for (i = 0; i < qp->rq.wqe_cnt; i++) {
qp->sqp_proxy_rcv[i].addr =
kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
GFP_KERNEL);
if (!qp->sqp_proxy_rcv[i].addr)
goto err;
qp->sqp_proxy_rcv[i].map =
ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
sizeof (struct mlx4_ib_proxy_sqp_hdr),
DMA_FROM_DEVICE);
if (unlikely(ib_dma_mapping_error(dev,
qp->sqp_proxy_rcv[i].map))) {
pr_warn("ib_dma_map_single failed\n");
kfree(qp->sqp_proxy_rcv[i].addr);
goto err;
}
}
return 0;
err:
while (i > 0) {
--i;
ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
sizeof (struct mlx4_ib_proxy_sqp_hdr),
DMA_FROM_DEVICE);
kfree(qp->sqp_proxy_rcv[i].addr);
}
kfree(qp->sqp_proxy_rcv);
qp->sqp_proxy_rcv = NULL;
return -ENOMEM;
}
static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
{
int i;
for (i = 0; i < qp->rq.wqe_cnt; i++) {
ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
sizeof (struct mlx4_ib_proxy_sqp_hdr),
DMA_FROM_DEVICE);
kfree(qp->sqp_proxy_rcv[i].addr);
}
kfree(qp->sqp_proxy_rcv);
}
static int init_qpg_parent(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *pqp,
struct ib_qp_init_attr *attr, int *qpn)
{
struct mlx4_ib_qpg_data *qpg_data;
int tss_num, rss_num;
int tss_align_num, rss_align_num;
int tss_base, rss_base = 0;
int err;
/* Parent is part of the TSS range (in SW TSS ARP is sent via parent) */
tss_num = 1 + attr->parent_attrib.tss_child_count;
tss_align_num = roundup_pow_of_two(tss_num);
rss_num = attr->parent_attrib.rss_child_count;
rss_align_num = roundup_pow_of_two(rss_num);
if (rss_num > 1) {
/* RSS is requested */
if (!(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS))
return -ENOSYS;
if (rss_align_num > dev->dev->caps.max_rss_tbl_sz)
return -EINVAL;
/* We must work with power of two */
attr->parent_attrib.rss_child_count = rss_align_num;
}
qpg_data = kzalloc(sizeof *qpg_data, GFP_KERNEL);
if (!qpg_data)
return -ENOMEM;
if(pqp->flags & MLX4_IB_QP_NETIF)
err = mlx4_ib_steer_qp_alloc(dev, tss_align_num, &tss_base);
else
err = mlx4_qp_reserve_range(dev->dev, tss_align_num,
tss_align_num, &tss_base, MLX4_RESERVE_BF_QP);
if (err)
goto err1;
if (tss_num > 1) {
u32 alloc = BITS_TO_LONGS(tss_align_num) * sizeof(long);
qpg_data->tss_bitmap = kzalloc(alloc, GFP_KERNEL);
if (qpg_data->tss_bitmap == NULL) {
err = -ENOMEM;
goto err2;
}
bitmap_fill(qpg_data->tss_bitmap, tss_num);
/* Note parent takes first index */
clear_bit(0, qpg_data->tss_bitmap);
}
if (rss_num > 1) {
u32 alloc = BITS_TO_LONGS(rss_align_num) * sizeof(long);
err = mlx4_qp_reserve_range(dev->dev, rss_align_num,
1, &rss_base, 0);
if (err)
goto err3;
qpg_data->rss_bitmap = kzalloc(alloc, GFP_KERNEL);
if (qpg_data->rss_bitmap == NULL) {
err = -ENOMEM;
goto err4;
}
bitmap_fill(qpg_data->rss_bitmap, rss_align_num);
}
qpg_data->tss_child_count = attr->parent_attrib.tss_child_count;
qpg_data->rss_child_count = attr->parent_attrib.rss_child_count;
qpg_data->qpg_parent = pqp;
qpg_data->qpg_tss_mask_sz = ilog2(tss_align_num);
qpg_data->tss_qpn_base = tss_base;
qpg_data->rss_qpn_base = rss_base;
pqp->qpg_data = qpg_data;
*qpn = tss_base;
return 0;
err4:
mlx4_qp_release_range(dev->dev, rss_base, rss_align_num);
err3:
if (tss_num > 1)
kfree(qpg_data->tss_bitmap);
err2:
if(pqp->flags & MLX4_IB_QP_NETIF)
mlx4_ib_steer_qp_free(dev, tss_base, tss_align_num);
else
mlx4_qp_release_range(dev->dev, tss_base, tss_align_num);
err1:
kfree(qpg_data);
return err;
}
static void free_qpg_parent(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *pqp)
{
struct mlx4_ib_qpg_data *qpg_data = pqp->qpg_data;
int align_num;
if (qpg_data->tss_child_count > 1)
kfree(qpg_data->tss_bitmap);
align_num = roundup_pow_of_two(1 + qpg_data->tss_child_count);
if(pqp->flags & MLX4_IB_QP_NETIF)
mlx4_ib_steer_qp_free(dev, qpg_data->tss_qpn_base, align_num);
else
mlx4_qp_release_range(dev->dev, qpg_data->tss_qpn_base, align_num);
if (qpg_data->rss_child_count > 1) {
kfree(qpg_data->rss_bitmap);
align_num = roundup_pow_of_two(qpg_data->rss_child_count);
mlx4_qp_release_range(dev->dev, qpg_data->rss_qpn_base,
align_num);
}
kfree(qpg_data);
}
static int alloc_qpg_qpn(struct ib_qp_init_attr *init_attr,
struct mlx4_ib_qp *pqp, int *qpn)
{
struct mlx4_ib_qp *mqp = to_mqp(init_attr->qpg_parent);
struct mlx4_ib_qpg_data *qpg_data = mqp->qpg_data;
u32 idx, old;
switch (init_attr->qpg_type) {
case IB_QPG_CHILD_TX:
if (qpg_data->tss_child_count == 0)
return -EINVAL;
do {
/* Parent took index 0 */
idx = find_first_bit(qpg_data->tss_bitmap,
qpg_data->tss_child_count + 1);
if (idx >= qpg_data->tss_child_count + 1)
return -ENOMEM;
old = test_and_clear_bit(idx, qpg_data->tss_bitmap);
} while (old == 0);
idx += qpg_data->tss_qpn_base;
break;
case IB_QPG_CHILD_RX:
if (qpg_data->rss_child_count == 0)
return -EINVAL;
do {
idx = find_first_bit(qpg_data->rss_bitmap,
qpg_data->rss_child_count);
if (idx >= qpg_data->rss_child_count)
return -ENOMEM;
old = test_and_clear_bit(idx, qpg_data->rss_bitmap);
} while (old == 0);
idx += qpg_data->rss_qpn_base;
break;
default:
return -EINVAL;
}
pqp->qpg_data = qpg_data;
*qpn = idx;
return 0;
}
static void free_qpg_qpn(struct mlx4_ib_qp *mqp, int qpn)
{
struct mlx4_ib_qpg_data *qpg_data = mqp->qpg_data;
switch (mqp->qpg_type) {
case IB_QPG_CHILD_TX:
/* Do range check */
qpn -= qpg_data->tss_qpn_base;
set_bit(qpn, qpg_data->tss_bitmap);
break;
case IB_QPG_CHILD_RX:
qpn -= qpg_data->rss_qpn_base;
set_bit(qpn, qpg_data->rss_bitmap);
break;
default:
/* error */
pr_warn("wrong qpg type (%d)\n", mqp->qpg_type);
break;
}
}
static int alloc_qpn_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
struct ib_qp_init_attr *attr, int *qpn)
{
int err = 0;
switch (attr->qpg_type) {
case IB_QPG_NONE:
/* Raw packet QPNs may not have bits 6,7 set in their qp_num;
* otherwise, the WQE BlueFlame setup flow wrongly causes
* VLAN insertion. */
if (attr->qp_type == IB_QPT_RAW_PACKET) {
err = mlx4_qp_reserve_range(dev->dev, 1, 1, qpn,
MLX4_RESERVE_BF_QP);
} else {
if(qp->flags & MLX4_IB_QP_NETIF)
err = mlx4_ib_steer_qp_alloc(dev, 1, qpn);
else
err = mlx4_qp_reserve_range(dev->dev, 1, 1, qpn, 0);
}
break;
case IB_QPG_PARENT:
err = init_qpg_parent(dev, qp, attr, qpn);
break;
case IB_QPG_CHILD_TX:
case IB_QPG_CHILD_RX:
err = alloc_qpg_qpn(attr, qp, qpn);
break;
default:
qp->qpg_type = IB_QPG_NONE;
err = -EINVAL;
break;
}
if (err)
return err;
qp->qpg_type = attr->qpg_type;
return 0;
}
static void free_qpn_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
enum ib_qpg_type qpg_type, int qpn)
{
switch (qpg_type) {
case IB_QPG_NONE:
if (qp->flags & MLX4_IB_QP_NETIF)
mlx4_ib_steer_qp_free(dev, qpn, 1);
else
mlx4_qp_release_range(dev->dev, qpn, 1);
break;
case IB_QPG_PARENT:
free_qpg_parent(dev, qp);
break;
case IB_QPG_CHILD_TX:
case IB_QPG_CHILD_RX:
free_qpg_qpn(qp, qpn);
break;
default:
break;
}
}
/* Revert allocation on create_qp_common */
static void unalloc_qpn_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
struct ib_qp_init_attr *attr, int qpn)
{
free_qpn_common(dev, qp, attr->qpg_type, qpn);
}
static void release_qpn_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
{
free_qpn_common(dev, qp, qp->qpg_type, qp->mqp.qpn);
}
static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata, int sqpn, struct mlx4_ib_qp **caller_qp)
{
int qpn;
int err;
struct mlx4_ib_sqp *sqp;
struct mlx4_ib_qp *qp;
enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
/* When tunneling special qps, we use a plain UD qp */
if (sqpn) {
if (mlx4_is_mfunc(dev->dev) &&
(!mlx4_is_master(dev->dev) ||
!(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
if (init_attr->qp_type == IB_QPT_GSI)
qp_type = MLX4_IB_QPT_PROXY_GSI;
else if (mlx4_is_master(dev->dev))
qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
else
qp_type = MLX4_IB_QPT_PROXY_SMI;
}
qpn = sqpn;
/* add extra sg entry for tunneling */
init_attr->cap.max_recv_sge++;
} else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
container_of(init_attr,
struct mlx4_ib_qp_tunnel_init_attr, init_attr);
if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
tnl_init->proxy_qp_type != IB_QPT_GSI) ||
!mlx4_is_master(dev->dev))
return -EINVAL;
if (tnl_init->proxy_qp_type == IB_QPT_GSI)
qp_type = MLX4_IB_QPT_TUN_GSI;
else if (tnl_init->slave == mlx4_master_func_num(dev->dev))
qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
else
qp_type = MLX4_IB_QPT_TUN_SMI;
/* we are definitely in the PPF here, since we are creating
* tunnel QPs. base_tunnel_sqpn is therefore valid. */
qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
+ tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
sqpn = qpn;
}
if (!*caller_qp) {
if (qp_type == MLX4_IB_QPT_SMI || qp_type == MLX4_IB_QPT_GSI ||
(qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
sqp = kzalloc(sizeof (struct mlx4_ib_sqp), GFP_KERNEL);
if (!sqp)
return -ENOMEM;
qp = &sqp->qp;
qp->pri.vid = qp->alt.vid = 0xFFFF;
} else {
qp = kzalloc(sizeof (struct mlx4_ib_qp), GFP_KERNEL);
if (!qp)
return -ENOMEM;
qp->pri.vid = qp->alt.vid = 0xFFFF;
}
} else
qp = *caller_qp;
qp->mlx4_ib_qp_type = qp_type;
if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
qp->flags |= MLX4_IB_QP_LSO;
if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
if (dev->dev->caps.steering_mode ==
MLX4_STEERING_MODE_DEVICE_MANAGED &&
!mlx4_is_mfunc(dev->dev))
qp->flags |= MLX4_IB_QP_NETIF;
else {
err = -EINVAL;
goto err;
}
}
mutex_init(&qp->mutex);
spin_lock_init(&qp->sq.lock);
spin_lock_init(&qp->rq.lock);
INIT_LIST_HEAD(&qp->gid_list);
INIT_LIST_HEAD(&qp->steering_rules);
INIT_LIST_HEAD(&qp->rules_list);
qp->state = IB_QPS_RESET;
if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
err = set_rq_size(dev, &init_attr->cap, !!pd->uobject, mlx4_ib_qp_has_rq(init_attr), qp);
if (err)
goto err;
if (pd->uobject) {
struct mlx4_ib_create_qp ucmd;
int shift;
int n;
if (!udata || ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
err = -EFAULT;
goto err;
}
if (init_attr->create_flags & IB_QP_CREATE_CROSS_CHANNEL)
qp->flags |= MLX4_IB_QP_CAP_CROSS_CHANNEL;
if (init_attr->create_flags & IB_QP_CREATE_MANAGED_SEND)
qp->flags |= MLX4_IB_QP_CAP_MANAGED_SEND;
if (init_attr->create_flags & IB_QP_CREATE_MANAGED_RECV)
qp->flags |= MLX4_IB_QP_CAP_MANAGED_RECV;
qp->sq_no_prefetch = ucmd.sq_no_prefetch;
err = set_user_sq_size(dev, qp, &ucmd);
if (err)
goto err;
qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
qp->buf_size, 0, 0);
if (IS_ERR(qp->umem)) {
err = PTR_ERR(qp->umem);
goto err;
}
n = ib_umem_page_count(qp->umem);
shift = mlx4_ib_umem_calc_optimal_mtt_size(qp->umem, 0, &n);
err = mlx4_mtt_init(dev->dev, n, shift, &qp->mtt);
if (err)
goto err_buf;
err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
if (err)
goto err_mtt;
if (mlx4_ib_qp_has_rq(init_attr)) {
err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
ucmd.db_addr, &qp->db);
if (err)
goto err_mtt;
}
} else {
qp->sq_no_prefetch = 0;
err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
if (err)
goto err;
if (mlx4_ib_qp_has_rq(init_attr)) {
err = mlx4_db_alloc(dev->dev, &qp->db, 0);
if (err)
goto err;
*qp->db.db = 0;
}
if (qp->max_inline_data) {
err = mlx4_bf_alloc(dev->dev, &qp->bf, 0);
if (err) {
pr_debug("failed to allocate blue flame"
" register (%d)", err);
qp->bf.uar = &dev->priv_uar;
}
} else
qp->bf.uar = &dev->priv_uar;
if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) {
err = -ENOMEM;
goto err_db;
}
err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
&qp->mtt);
if (err)
goto err_buf;
err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf);
if (err)
goto err_mtt;
qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), GFP_KERNEL);
qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), GFP_KERNEL);
if (!qp->sq.wrid || !qp->rq.wrid) {
err = -ENOMEM;
goto err_wrid;
}
}
if (sqpn) {
if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
if (alloc_proxy_bufs(pd->device, qp)) {
err = -ENOMEM;
goto err_wrid;
}
}
} else {
err = alloc_qpn_common(dev, qp, init_attr, &qpn);
if (err)
goto err_proxy;
}
err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
if (err)
goto err_qpn;
if (init_attr->qp_type == IB_QPT_XRC_TGT)
qp->mqp.qpn |= (1 << 23);
/*
* Hardware wants QPN written in big-endian order (after
* shifting) for send doorbell. Precompute this value to save
* a little bit when posting sends.
*/
qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
qp->mqp.event = mlx4_ib_qp_event;
if (!*caller_qp)
*caller_qp = qp;
return 0;
err_qpn:
unalloc_qpn_common(dev, qp, init_attr, qpn);
err_proxy:
if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
free_proxy_bufs(pd->device, qp);
err_wrid:
if (pd->uobject) {
if (mlx4_ib_qp_has_rq(init_attr))
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
} else {
kfree(qp->sq.wrid);
kfree(qp->rq.wrid);
}
err_mtt:
mlx4_mtt_cleanup(dev->dev, &qp->mtt);
err_buf:
if (pd->uobject)
ib_umem_release(qp->umem);
else
mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
err_db:
if (!pd->uobject && mlx4_ib_qp_has_rq(init_attr))
mlx4_db_free(dev->dev, &qp->db);
if (qp->max_inline_data)
mlx4_bf_free(dev->dev, &qp->bf);
err:
if (!*caller_qp)
kfree(qp);
return err;
}
static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
{
switch (state) {
case IB_QPS_RESET: return MLX4_QP_STATE_RST;
case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
default: return -1;
}
}
static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
__acquires(&send_cq->lock) __acquires(&recv_cq->lock)
{
if (send_cq == recv_cq) {
spin_lock_irq(&send_cq->lock);
__acquire(&recv_cq->lock);
} else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
spin_lock_irq(&send_cq->lock);
spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
} else {
spin_lock_irq(&recv_cq->lock);
spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
}
}
static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
__releases(&send_cq->lock) __releases(&recv_cq->lock)
{
if (send_cq == recv_cq) {
__release(&recv_cq->lock);
spin_unlock_irq(&send_cq->lock);
} else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
spin_unlock(&recv_cq->lock);
spin_unlock_irq(&send_cq->lock);
} else {
spin_unlock(&send_cq->lock);
spin_unlock_irq(&recv_cq->lock);
}
}
static void del_gid_entries(struct mlx4_ib_qp *qp)
{
struct mlx4_ib_gid_entry *ge, *tmp;
list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
list_del(&ge->list);
kfree(ge);
}
}
static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
{
if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
else
return to_mpd(qp->ibqp.pd);
}
static void get_cqs(struct mlx4_ib_qp *qp,
struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
{
switch (qp->ibqp.qp_type) {
case IB_QPT_XRC_TGT:
*send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
*recv_cq = *send_cq;
break;
case IB_QPT_XRC_INI:
*send_cq = to_mcq(qp->ibqp.send_cq);
*recv_cq = *send_cq;
break;
default:
*send_cq = to_mcq(qp->ibqp.send_cq);
*recv_cq = to_mcq(qp->ibqp.recv_cq);
break;
}
}
static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
int is_user)
{
struct mlx4_ib_cq *send_cq, *recv_cq;
if (qp->state != IB_QPS_RESET) {
if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
pr_warn("modify QP %06x to RESET failed.\n",
qp->mqp.qpn);
if (qp->pri.smac) {
mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
qp->pri.smac = 0;
}
if (qp->alt.smac) {
mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
qp->alt.smac = 0;
}
if (qp->pri.vid < 0x1000) {
mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
qp->pri.vid = 0xFFFF;
qp->pri.candidate_vid = 0xFFFF;
qp->pri.update_vid = 0;
}
if (qp->alt.vid < 0x1000) {
mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
qp->alt.vid = 0xFFFF;
qp->alt.candidate_vid = 0xFFFF;
qp->alt.update_vid = 0;
}
}
get_cqs(qp, &send_cq, &recv_cq);
mlx4_ib_lock_cqs(send_cq, recv_cq);
if (!is_user) {
__mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
if (send_cq != recv_cq)
__mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
}
mlx4_qp_remove(dev->dev, &qp->mqp);
mlx4_ib_unlock_cqs(send_cq, recv_cq);
mlx4_qp_free(dev->dev, &qp->mqp);
if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp))
release_qpn_common(dev, qp);
mlx4_mtt_cleanup(dev->dev, &qp->mtt);
if (is_user) {
if (qp->rq.wqe_cnt)
mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
&qp->db);
ib_umem_release(qp->umem);
} else {
kfree(qp->sq.wrid);
kfree(qp->rq.wrid);
if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
free_proxy_bufs(&dev->ib_dev, qp);
mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
if (qp->max_inline_data)
mlx4_bf_free(dev->dev, &qp->bf);
if (qp->rq.wqe_cnt)
mlx4_db_free(dev->dev, &qp->db);
}
del_gid_entries(qp);
}
static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
{
/* Native or PPF */
if (!mlx4_is_mfunc(dev->dev) ||
(mlx4_is_master(dev->dev) &&
attr->create_flags & MLX4_IB_SRIOV_SQP)) {
return dev->dev->phys_caps.base_sqpn +
(attr->qp_type == IB_QPT_SMI ? 0 : 2) +
attr->port_num - 1;
}
/* PF or VF -- creating proxies */
if (attr->qp_type == IB_QPT_SMI)
return dev->dev->caps.qp0_proxy[attr->port_num - 1];
else
return dev->dev->caps.qp1_proxy[attr->port_num - 1];
}
static int check_qpg_attr(struct mlx4_ib_dev *dev,
struct ib_qp_init_attr *attr)
{
if (attr->qpg_type == IB_QPG_NONE)
return 0;
if (attr->qp_type != IB_QPT_UD &&
attr->qp_type != IB_QPT_RAW_PACKET)
return -EINVAL;
if (attr->qpg_type == IB_QPG_PARENT) {
if (attr->parent_attrib.tss_child_count == 1)
return -EINVAL; /* Doesn't make sense */
if (attr->parent_attrib.rss_child_count == 1)
return -EINVAL; /* Doesn't make sense */
if ((attr->parent_attrib.tss_child_count == 0) &&
(attr->parent_attrib.rss_child_count == 0))
/* Should be called with IP_QPG_NONE */
return -EINVAL;
if (attr->parent_attrib.rss_child_count > 1) {
int rss_align_num;
if (!(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS))
return -ENOSYS;
rss_align_num = roundup_pow_of_two(
attr->parent_attrib.rss_child_count);
if (rss_align_num > dev->dev->caps.max_rss_tbl_sz)
return -EINVAL;
}
} else {
struct mlx4_ib_qpg_data *qpg_data;
if (attr->qpg_parent == NULL)
return -EINVAL;
if (IS_ERR(attr->qpg_parent))
return -EINVAL;
qpg_data = to_mqp(attr->qpg_parent)->qpg_data;
if (qpg_data == NULL)
return -EINVAL;
if (attr->qpg_type == IB_QPG_CHILD_TX &&
!qpg_data->tss_child_count)
return -EINVAL;
if (attr->qpg_type == IB_QPG_CHILD_RX &&
!qpg_data->rss_child_count)
return -EINVAL;
}
return 0;
}
#define RESERVED_FLAGS_MASK ((((unsigned int)IB_QP_CREATE_RESERVED_END - 1) | IB_QP_CREATE_RESERVED_END) \
& ~(IB_QP_CREATE_RESERVED_START - 1))
static enum mlx4_ib_qp_flags to_mlx4_ib_qp_flags(enum ib_qp_create_flags ib_qp_flags)
{
enum mlx4_ib_qp_flags mlx4_ib_qp_flags = 0;
if (ib_qp_flags & IB_QP_CREATE_IPOIB_UD_LSO)
mlx4_ib_qp_flags |= MLX4_IB_QP_LSO;
if (ib_qp_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
mlx4_ib_qp_flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
if (ib_qp_flags & IB_QP_CREATE_NETIF_QP)
mlx4_ib_qp_flags |= MLX4_IB_QP_NETIF;
if (ib_qp_flags & IB_QP_CREATE_CROSS_CHANNEL)
mlx4_ib_qp_flags |= MLX4_IB_QP_CAP_CROSS_CHANNEL;
if (ib_qp_flags & IB_QP_CREATE_MANAGED_SEND)
mlx4_ib_qp_flags |= MLX4_IB_QP_CAP_MANAGED_SEND;
if (ib_qp_flags & IB_QP_CREATE_MANAGED_RECV)
mlx4_ib_qp_flags |= MLX4_IB_QP_CAP_MANAGED_RECV;
/* reserved flags */
mlx4_ib_qp_flags |= (ib_qp_flags & RESERVED_FLAGS_MASK);
return mlx4_ib_qp_flags;
}
struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata)
{
struct mlx4_ib_qp *qp = NULL;
int err;
u16 xrcdn = 0;
enum mlx4_ib_qp_flags mlx4_qp_flags = to_mlx4_ib_qp_flags(init_attr->create_flags);
struct ib_device *device;
/* see ib_core::ib_create_qp same handling */
device = pd ? pd->device : init_attr->xrcd->device;
/*
* We only support LSO, vendor flag1, and multicast loopback blocking,
* and only for kernel UD QPs.
*/
if (mlx4_qp_flags & ~(MLX4_IB_QP_LSO |
MLX4_IB_QP_CAP_CROSS_CHANNEL |
MLX4_IB_QP_CAP_MANAGED_SEND |
MLX4_IB_QP_CAP_MANAGED_RECV |
MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
MLX4_IB_SRIOV_TUNNEL_QP | MLX4_IB_SRIOV_SQP |
MLX4_IB_QP_NETIF))
return ERR_PTR(-EINVAL);
if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
if (init_attr->qp_type != IB_QPT_UD)
return ERR_PTR(-EINVAL);
}
if ((mlx4_qp_flags &
(MLX4_IB_QP_CAP_CROSS_CHANNEL |
MLX4_IB_QP_CAP_MANAGED_SEND |
MLX4_IB_QP_CAP_MANAGED_RECV)) &&
!(to_mdev(device)->dev->caps.flags &
MLX4_DEV_CAP_FLAG_CROSS_CHANNEL)) {
pr_debug("%s Does not support cross-channel operations\n",
to_mdev(device)->ib_dev.name);
return ERR_PTR(-EINVAL);
}
if ((init_attr->create_flags &
~(IB_QP_CREATE_CROSS_CHANNEL |
IB_QP_CREATE_MANAGED_SEND |
IB_QP_CREATE_MANAGED_RECV)) &&
(((mlx4_qp_flags & ~MLX4_IB_SRIOV_SQP) &&
init_attr->qp_type != IB_QPT_UD) ||
((mlx4_qp_flags & MLX4_IB_SRIOV_SQP) &&
init_attr->qp_type > IB_QPT_GSI)))
return ERR_PTR(-EINVAL);
err = check_qpg_attr(to_mdev(device), init_attr);
if (err)
return ERR_PTR(err);
switch (init_attr->qp_type) {
case IB_QPT_XRC_TGT:
pd = to_mxrcd(init_attr->xrcd)->pd;
xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
/* fall through */
case IB_QPT_XRC_INI:
if (!(to_mdev(device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
return ERR_PTR(-ENOSYS);
init_attr->recv_cq = init_attr->send_cq;
/* fall through */
case IB_QPT_RC:
case IB_QPT_UC:
case IB_QPT_RAW_PACKET:
qp = kzalloc(sizeof *qp, GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
qp->pri.vid = qp->alt.vid = 0xFFFF;
/* fall through */
case IB_QPT_UD:
{
err = create_qp_common(to_mdev(device), pd, init_attr, udata, 0, &qp);
if (err) {
kfree(qp);
return ERR_PTR(err);
}
qp->ibqp.qp_num = qp->mqp.qpn;
qp->xrcdn = xrcdn;
break;
}
case IB_QPT_SMI:
case IB_QPT_GSI:
{
/* Userspace is not allowed to create special QPs: */
if (udata)
return ERR_PTR(-EINVAL);
err = create_qp_common(to_mdev(device), pd, init_attr, udata,
get_sqp_num(to_mdev(device), init_attr),
&qp);
if (err)
return ERR_PTR(err);
qp->port = init_attr->port_num;
qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
break;
}
default:
/* Don't support raw QPs */
return ERR_PTR(-EINVAL);
}
return &qp->ibqp;
}
int mlx4_ib_destroy_qp(struct ib_qp *qp)
{
struct mlx4_ib_dev *dev = to_mdev(qp->device);
struct mlx4_ib_qp *mqp = to_mqp(qp);
struct mlx4_ib_pd *pd;
if (is_qp0(dev, mqp))
mlx4_CLOSE_PORT(dev->dev, mqp->port);
pd = get_pd(mqp);
destroy_qp_common(dev, mqp, !!pd->ibpd.uobject);
if (is_sqp(dev, mqp))
kfree(to_msqp(mqp));
else
kfree(mqp);
return 0;
}
static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
{
switch (type) {
case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
case MLX4_IB_QPT_XRC_INI:
case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
case MLX4_IB_QPT_SMI:
case MLX4_IB_QPT_GSI:
case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
case MLX4_IB_QPT_PROXY_SMI_OWNER:
case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
MLX4_QP_ST_MLX : -1);
case MLX4_IB_QPT_PROXY_SMI:
case MLX4_IB_QPT_TUN_SMI:
case MLX4_IB_QPT_PROXY_GSI:
case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
MLX4_QP_ST_UD : -1);
default: return -1;
}
}
static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
int attr_mask)
{
u8 dest_rd_atomic;
u32 access_flags;
u32 hw_access_flags = 0;
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
dest_rd_atomic = attr->max_dest_rd_atomic;
else
dest_rd_atomic = qp->resp_depth;
if (attr_mask & IB_QP_ACCESS_FLAGS)
access_flags = attr->qp_access_flags;
else
access_flags = qp->atomic_rd_en;
if (!dest_rd_atomic)
access_flags &= IB_ACCESS_REMOTE_WRITE;
if (access_flags & IB_ACCESS_REMOTE_READ)
hw_access_flags |= MLX4_QP_BIT_RRE;
if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
hw_access_flags |= MLX4_QP_BIT_RAE;
if (access_flags & IB_ACCESS_REMOTE_WRITE)
hw_access_flags |= MLX4_QP_BIT_RWE;
return cpu_to_be32(hw_access_flags);
}
static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
int attr_mask)
{
if (attr_mask & IB_QP_PKEY_INDEX)
sqp->pkey_index = attr->pkey_index;
if (attr_mask & IB_QP_QKEY)
sqp->qkey = attr->qkey;
if (attr_mask & IB_QP_SQ_PSN)
sqp->send_psn = attr->sq_psn;
}
static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
{
path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
}
static int ib_rate_to_mlx4(struct mlx4_ib_dev *dev, u8 rate)
{
if (rate == IB_RATE_PORT_CURRENT) {
return 0;
} else if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) {
return -EINVAL;
} else {
while (rate != IB_RATE_2_5_GBPS &&
!(1 << (rate + MLX4_STAT_RATE_OFFSET) &
dev->dev->caps.stat_rate_support))
--rate;
}
return rate + MLX4_STAT_RATE_OFFSET;
}
static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
u8 *smac, u16 vlan_id, struct mlx4_ib_qp *qp,
struct mlx4_qp_path *path, u8 port, int is_primary)
{
int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port) ==
IB_LINK_LAYER_ETHERNET;
u16 vlan_tag;
int vidx;
int smac_index;
int err;
u64 u64_mac;
struct mlx4_roce_smac_vlan_info *smac_info;
path->grh_mylmc = ah->src_path_bits & 0x7f;
path->rlid = cpu_to_be16(ah->dlid);
err = ib_rate_to_mlx4(dev, ah->static_rate);
if (err < 0)
return err;
path->static_rate = err;
if (ah->ah_flags & IB_AH_GRH) {
if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len[port]) {
pr_err("sgid_index (%u) too large. max is %d\n",
ah->grh.sgid_index, dev->dev->caps.gid_table_len[port] - 1);
return -1;
}
path->grh_mylmc |= 1 << 7;
path->mgid_index = ah->grh.sgid_index;
path->hop_limit = ah->grh.hop_limit;
path->tclass_flowlabel =
cpu_to_be32((ah->grh.traffic_class << 20) |
(ah->grh.flow_label));
memcpy(path->rgid, ah->grh.dgid.raw, 16);
}
if (is_eth) {
if (!(ah->ah_flags & IB_AH_GRH))
return -1;
path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
((port - 1) << 6) | ((ah->sl & 7) << 3);
if (is_primary)
smac_info = &qp->pri;
else
smac_info = &qp->alt;
vlan_tag = vlan_id;
if (vlan_tag < 0x1000) {
if (smac_info->vid < 0x1000) {
/* both valid vlan ids */
if (smac_info->vid != vlan_tag) {
/* different VIDs. unreg old and reg new */
err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
if (err)
return err;
smac_info->candidate_vid = vlan_tag;
smac_info->candidate_vlan_index = vidx;
smac_info->candidate_vlan_port = port;
smac_info->update_vid = 1;
path->vlan_index = vidx;
path->fl = 1 << 6;
} else {
path->vlan_index = smac_info->vlan_index;
path->fl = 1 << 6;
}
} else {
/* no current vlan tag in qp */
err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
if (err)
return err;
smac_info->candidate_vid = vlan_tag;
smac_info->candidate_vlan_index = vidx;
smac_info->candidate_vlan_port = port;
smac_info->update_vid = 1;
path->vlan_index = vidx;
path->fl = 1 << 6;
}
} else {
/* have current vlan tag. unregister it at modify-qp success */
if (smac_info->vid < 0x1000) {
smac_info->candidate_vid = 0xFFFF;
smac_info->update_vid = 1;
}
}
/* get smac_index for RoCE use.
* If no smac was yet assigned, register one.
* If one was already assigned, but the new mac differs,
* unregister the old one and register the new one.
*/
u64_mac = mlx4_mac_to_u64(smac);
if (!smac_info->smac || smac_info->smac != u64_mac) {
/* register candidate now, unreg if needed, after success */
smac_index = mlx4_register_mac(dev->dev, port, u64_mac);
if (smac_index >= 0) {
smac_info->candidate_smac_index = smac_index;
smac_info->candidate_smac = u64_mac;
smac_info->candidate_smac_port = port;
} else
return -EINVAL;
} else
smac_index = smac_info->smac_index;
memcpy(path->dmac, ah->dmac, 6);
path->ackto = MLX4_IB_LINK_TYPE_ETH;
/* put MAC table smac index for IBoE */
path->grh_mylmc = (u8) (smac_index) | 0x80 ;
} else
path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
((port - 1) << 6) | ((ah->sl & 0xf) << 2);
return 0;
}
static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
{
struct mlx4_ib_gid_entry *ge, *tmp;
list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
ge->added = 1;
ge->port = qp->port;
}
}
}
static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, const u8 *smac,
struct mlx4_qp_context *context)
{
struct net_device *ndev;
u64 u64_mac;
int smac_index;
ndev = dev->iboe.netdevs[qp->port - 1];
if (ndev) {
smac = IF_LLADDR(ndev);
u64_mac = mlx4_mac_to_u64(smac);
} else {
u64_mac = dev->dev->caps.def_mac[qp->port];
}
context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6);
if (!qp->pri.smac) {
smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac);
if (smac_index >= 0) {
qp->pri.candidate_smac_index = smac_index;
qp->pri.candidate_smac = u64_mac;
qp->pri.candidate_smac_port = qp->port;
context->pri_path.grh_mylmc = 0x80 | (u8) smac_index;
} else
return -ENOENT;
}
return 0;
}
static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
const struct ib_qp_attr *attr, int attr_mask,
enum ib_qp_state cur_state, enum ib_qp_state new_state)
{
struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
struct mlx4_ib_qp *qp = to_mqp(ibqp);
struct mlx4_ib_pd *pd;
struct mlx4_ib_cq *send_cq, *recv_cq;
struct mlx4_qp_context *context;
enum mlx4_qp_optpar optpar = 0;
int sqd_event;
int steer_qp = 0;
int err = -EINVAL;
int is_eth = -1;
context = kzalloc(sizeof *context, GFP_KERNEL);
if (!context)
return -ENOMEM;
context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
(to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
if (!(attr_mask & IB_QP_PATH_MIG_STATE))
context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
else {
optpar |= MLX4_QP_OPTPAR_PM_STATE;
switch (attr->path_mig_state) {
case IB_MIG_MIGRATED:
context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
break;
case IB_MIG_REARM:
context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
break;
case IB_MIG_ARMED:
context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
break;
}
}
if (qp->max_inlr_data)
context->param3 |= cpu_to_be32(1 << 25);
if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI)
context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
else if (ibqp->qp_type == IB_QPT_RAW_PACKET)
context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
else if (ibqp->qp_type == IB_QPT_UD) {
if (qp->flags & MLX4_IB_QP_LSO)
context->mtu_msgmax = (IB_MTU_4096 << 5) |
ilog2(dev->dev->caps.max_gso_sz);
else
context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
} else if (attr_mask & IB_QP_PATH_MTU) {
if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
pr_err("path MTU (%u) is invalid\n",
attr->path_mtu);
goto out;
}
context->mtu_msgmax = (attr->path_mtu << 5) |
ilog2(dev->dev->caps.max_msg_sz);
}
if (qp->rq.wqe_cnt)
context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
context->rq_size_stride |= qp->rq.wqe_shift - 4;
if (qp->sq.wqe_cnt)
context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
context->sq_size_stride |= qp->sq.wqe_shift - 4;
if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
context->xrcd = cpu_to_be32((u32) qp->xrcdn);
context->param3 |= cpu_to_be32(1 << 30);
}
if (qp->ibqp.uobject)
context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
else
context->usr_page = cpu_to_be32(qp->bf.uar->index);
if (attr_mask & IB_QP_DEST_QPN)
context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
if (attr_mask & IB_QP_PORT) {
if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
!(attr_mask & IB_QP_AV)) {
mlx4_set_sched(&context->pri_path, attr->port_num);
optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
}
}
if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
if (dev->counters[qp->port - 1].counter_index != -1) {
context->pri_path.counter_index =
dev->counters[qp->port - 1].counter_index;
optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
} else {
context->pri_path.counter_index = 0xff;
}
if (qp->flags & MLX4_IB_QP_NETIF &&
(qp->qpg_type == IB_QPG_NONE || qp->qpg_type == IB_QPG_PARENT)) {
mlx4_ib_steer_qp_reg(dev, qp, 1);
steer_qp = 1;
}
}
if (attr_mask & IB_QP_PKEY_INDEX) {
if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
context->pri_path.disable_pkey_check = 0x40;
context->pri_path.pkey_index = attr->pkey_index;
optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
}
if ((attr_mask & IB_QP_AV) && (ibqp->qp_type != IB_QPT_RAW_PACKET)) {
if (mlx4_set_path(dev, &attr->ah_attr, (u8 *)attr->smac,
attr_mask & IB_QP_VID ?
attr->vlan_id : 0xffff ,
qp, &context->pri_path,
attr_mask & IB_QP_PORT ?
attr->port_num : qp->port, 1))
goto out;
optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
MLX4_QP_OPTPAR_SCHED_QUEUE);
}
if (attr_mask & IB_QP_TIMEOUT) {
context->pri_path.ackto |= attr->timeout << 3;
optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
}
if (attr_mask & IB_QP_ALT_PATH) {
if (attr->alt_port_num == 0 ||
attr->alt_port_num > dev->dev->caps.num_ports)
goto out;
if (attr->alt_pkey_index >=
dev->dev->caps.pkey_table_len[attr->alt_port_num])
goto out;
if (mlx4_set_path(dev, &attr->alt_ah_attr, (u8 *)attr->smac,
attr_mask & IB_QP_ALT_VID ?
attr->alt_vlan_id : 0xffff,
qp, &context->alt_path,
attr->alt_port_num, 0))
goto out;
context->alt_path.pkey_index = attr->alt_pkey_index;
context->alt_path.ackto = attr->alt_timeout << 3;
context->alt_path.counter_index = dev->counters[attr->alt_port_num - 1].counter_index;
optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
}
pd = get_pd(qp);
get_cqs(qp, &send_cq, &recv_cq);
context->pd = cpu_to_be32(pd->pdn);
context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
/* Set "fast registration enabled" for all kernel QPs */
if (!qp->ibqp.uobject)
context->params1 |= cpu_to_be32(1 << 11);
if (attr_mask & IB_QP_RNR_RETRY) {
context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
}
if (attr_mask & IB_QP_RETRY_CNT) {
context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
if (attr->max_rd_atomic)
context->params1 |=
cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
optpar |= MLX4_QP_OPTPAR_SRA_MAX;
}
if (attr_mask & IB_QP_SQ_PSN)
context->next_send_psn = cpu_to_be32(attr->sq_psn);
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
if (attr->max_dest_rd_atomic)
context->params2 |=
cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
optpar |= MLX4_QP_OPTPAR_RRA_MAX;
}
if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
}
if (attr_mask & IB_M_EXT_CLASS_1)
context->params2 |= cpu_to_be32(MLX4_QP_BIT_COLL_MASTER);
/* for now we enable also sqe on send */
if (attr_mask & IB_M_EXT_CLASS_2) {
context->params2 |= cpu_to_be32(MLX4_QP_BIT_COLL_SYNC_SQ);
context->params2 |= cpu_to_be32(MLX4_QP_BIT_COLL_MASTER);
}
if (attr_mask & IB_M_EXT_CLASS_3)
context->params2 |= cpu_to_be32(MLX4_QP_BIT_COLL_SYNC_RQ);
if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
context->params2 |= (qp->flags & MLX4_IB_QP_CAP_CROSS_CHANNEL ?
cpu_to_be32(MLX4_QP_BIT_COLL_MASTER) : 0);
context->params2 |= (qp->flags & MLX4_IB_QP_CAP_MANAGED_SEND ?
cpu_to_be32(MLX4_QP_BIT_COLL_MASTER | MLX4_QP_BIT_COLL_SYNC_SQ) : 0);
context->params2 |= (qp->flags & MLX4_IB_QP_CAP_MANAGED_RECV ?
cpu_to_be32(MLX4_QP_BIT_COLL_MASTER | MLX4_QP_BIT_COLL_SYNC_RQ) : 0);
}
if (ibqp->srq)
context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
if (attr_mask & IB_QP_MIN_RNR_TIMER) {
context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
}
if (attr_mask & IB_QP_RQ_PSN)
context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
/* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
if (attr_mask & IB_QP_QKEY) {
if (qp->mlx4_ib_qp_type &
(MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
else {
if (mlx4_is_mfunc(dev->dev) &&
!(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
(attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
MLX4_RESERVED_QKEY_BASE) {
pr_err("Cannot use reserved QKEY"
" 0x%x (range 0xffff0000..0xffffffff"
" is reserved)\n", attr->qkey);
err = -EINVAL;
goto out;
}
context->qkey = cpu_to_be32(attr->qkey);
}
optpar |= MLX4_QP_OPTPAR_Q_KEY;
}
if (ibqp->srq)
context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
context->db_rec_addr = cpu_to_be64(qp->db.dma);
if (cur_state == IB_QPS_INIT &&
new_state == IB_QPS_RTR &&
(ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
ibqp->qp_type == IB_QPT_UD ||
ibqp->qp_type == IB_QPT_RAW_PACKET)) {
context->pri_path.sched_queue = (qp->port - 1) << 6;
if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
qp->mlx4_ib_qp_type &
(MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
context->pri_path.fl = 0x80;
} else {
if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
context->pri_path.fl = 0x80;
context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
}
if (ibqp->qp_type == IB_QPT_RAW_PACKET &&
(attr_mask & IB_QP_AV)) {
context->pri_path.sched_queue |=
((attr->ah_attr.sl & 0xf) << 3);
context->pri_path.feup = 1 << 6;
}
is_eth = rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
IB_LINK_LAYER_ETHERNET;
if (is_eth) {
if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
context->pri_path.feup = 1 << 7; /* don't fsm */
/* handle smac_index */
if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
err = handle_eth_ud_smac_index(dev, qp, (const u8 *)attr->smac, context);
if (err)
return -EINVAL;
}
}
}
if (ibqp->qp_type == IB_QPT_UD)
if (is_eth && (new_state == IB_QPS_RTR)) {
context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
}
if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
sqd_event = 1;
else
sqd_event = 0;
if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
context->rlkey |= (1 << 4);
if ((attr_mask & IB_QP_GROUP_RSS) &&
(qp->qpg_data->rss_child_count > 1)) {
struct mlx4_ib_qpg_data *qpg_data = qp->qpg_data;
void *rss_context_base = &context->pri_path;
struct mlx4_rss_context *rss_context =
(struct mlx4_rss_context *) (rss_context_base
+ MLX4_RSS_OFFSET_IN_QPC_PRI_PATH);
context->flags |= cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET);
/* This should be tbl_sz_base_qpn */
rss_context->base_qpn = cpu_to_be32(qpg_data->rss_qpn_base |
(ilog2(qpg_data->rss_child_count) << 24));
rss_context->default_qpn = cpu_to_be32(qpg_data->rss_qpn_base);
/* This should be flags_hash_fn */
rss_context->flags = MLX4_RSS_TCP_IPV6 |
MLX4_RSS_TCP_IPV4;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UDP_RSS) {
rss_context->base_qpn_udp = rss_context->default_qpn;
rss_context->flags |= MLX4_RSS_IPV6 |
MLX4_RSS_IPV4 |
MLX4_RSS_UDP_IPV6 |
MLX4_RSS_UDP_IPV4;
}
if (dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS_TOP) {
static const u32 rsskey[10] = { 0xD181C62C, 0xF7F4DB5B,
0x1983A2FC, 0x943E1ADB, 0xD9389E6B, 0xD1039C2C,
0xA74499AD, 0x593D56D9, 0xF3253C06, 0x2ADC1FFC};
rss_context->hash_fn = MLX4_RSS_HASH_TOP;
memcpy(rss_context->rss_key, rsskey,
sizeof(rss_context->rss_key));
} else {
rss_context->hash_fn = MLX4_RSS_HASH_XOR;
memset(rss_context->rss_key, 0,
sizeof(rss_context->rss_key));
}
}
/*
* Before passing a kernel QP to the HW, make sure that the
* ownership bits of the send queue are set and the SQ
* headroom is stamped so that the hardware doesn't start
* processing stale work requests.
*/
if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
struct mlx4_wqe_ctrl_seg *ctrl;
int i;
for (i = 0; i < qp->sq.wqe_cnt; ++i) {
ctrl = get_send_wqe(qp, i);
ctrl->owner_opcode = cpu_to_be32(1 << 31);
if (qp->sq_max_wqes_per_wr == 1)
ctrl->fence_size = 1 << (qp->sq.wqe_shift - 4);
stamp_send_wqe(qp, i, 1 << qp->sq.wqe_shift);
}
}
if ((qp->port && rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
IB_LINK_LAYER_ETHERNET) && (qp->ibqp.qp_type == IB_QPT_RAW_PACKET))
context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
MLX4_IB_LINK_TYPE_ETH;
err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
to_mlx4_state(new_state), context, optpar,
sqd_event, &qp->mqp);
if (err)
goto out;
qp->state = new_state;
if (attr_mask & IB_QP_ACCESS_FLAGS)
qp->atomic_rd_en = attr->qp_access_flags;
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
qp->resp_depth = attr->max_dest_rd_atomic;
if (attr_mask & IB_QP_PORT) {
qp->port = attr->port_num;
update_mcg_macs(dev, qp);
}
if (attr_mask & IB_QP_ALT_PATH)
qp->alt_port = attr->alt_port_num;
if (is_sqp(dev, qp))
store_sqp_attrs(to_msqp(qp), attr, attr_mask);
/* Set 'ignore_cq_overrun' bits for collectives offload */
if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
if (attr_mask & (IB_M_EXT_CLASS_2 | IB_M_EXT_CLASS_3)) {
err = mlx4_ib_ignore_overrun_cq(ibqp->send_cq);
if (err) {
pr_err("Failed to set ignore CQ "
"overrun for QP 0x%x's send CQ\n",
ibqp->qp_num);
goto out;
}
if (ibqp->recv_cq != ibqp->send_cq) {
err = mlx4_ib_ignore_overrun_cq(ibqp->recv_cq);
if (err) {
pr_err("Failed to set ignore "
"CQ overrun for QP 0x%x's recv "
"CQ\n", ibqp->qp_num);
goto out;
}
}
}
}
/*
* If we moved QP0 to RTR, bring the IB link up; if we moved
* QP0 to RESET or ERROR, bring the link back down.
*/
if (is_qp0(dev, qp)) {
if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
if (mlx4_INIT_PORT(dev->dev, qp->port))
pr_warn("INIT_PORT failed for port %d\n",
qp->port);
if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
(new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
mlx4_CLOSE_PORT(dev->dev, qp->port);
}
/*
* If we moved a kernel QP to RESET, clean up all old CQ
* entries and reinitialize the QP.
*/
if (new_state == IB_QPS_RESET) {
if (!ibqp->uobject) {
mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
ibqp->srq ? to_msrq(ibqp->srq) : NULL);
if (send_cq != recv_cq)
mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
qp->rq.head = 0;
qp->rq.tail = 0;
qp->sq.head = 0;
qp->sq.tail = 0;
qp->sq_next_wqe = 0;
if (qp->rq.wqe_cnt)
*qp->db.db = 0;
if (qp->flags & MLX4_IB_QP_NETIF &&
(qp->qpg_type == IB_QPG_NONE ||
qp->qpg_type == IB_QPG_PARENT))
mlx4_ib_steer_qp_reg(dev, qp, 0);
}
if (qp->pri.smac) {
mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
qp->pri.smac = 0;
}
if (qp->alt.smac) {
mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
qp->alt.smac = 0;
}
if (qp->pri.vid < 0x1000) {
mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
qp->pri.vid = 0xFFFF;
qp->pri.candidate_vid = 0xFFFF;
qp->pri.update_vid = 0;
}
if (qp->alt.vid < 0x1000) {
mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
qp->alt.vid = 0xFFFF;
qp->alt.candidate_vid = 0xFFFF;
qp->alt.update_vid = 0;
}
}
out:
if (err && steer_qp)
mlx4_ib_steer_qp_reg(dev, qp, 0);
kfree(context);
if (qp->pri.candidate_smac) {
if (err)
mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
else {
if (qp->pri.smac) {
mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
}
qp->pri.smac = qp->pri.candidate_smac;
qp->pri.smac_index = qp->pri.candidate_smac_index;
qp->pri.smac_port = qp->pri.candidate_smac_port;
}
qp->pri.candidate_smac = 0;
qp->pri.candidate_smac_index = 0;
qp->pri.candidate_smac_port = 0;
}
if (qp->alt.candidate_smac) {
if (err)
mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->pri.candidate_smac);
else {
if (qp->pri.smac) {
mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
}
qp->alt.smac = qp->alt.candidate_smac;
qp->alt.smac_index = qp->alt.candidate_smac_index;
qp->alt.smac_port = qp->alt.candidate_smac_port;
}
qp->pri.candidate_smac = 0;
qp->pri.candidate_smac_index = 0;
qp->pri.candidate_smac_port = 0;
}
if (qp->pri.update_vid) {
if (err) {
if (qp->pri.candidate_vid < 0x1000)
mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
qp->pri.candidate_vid);
} else {
if (qp->pri.vid < 0x1000)
mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
qp->pri.vid);
qp->pri.vid = qp->pri.candidate_vid;
qp->pri.vlan_port = qp->pri.candidate_vlan_port;
qp->pri.vlan_index = qp->pri.candidate_vlan_index;
}
qp->pri.candidate_vid = 0xFFFF;
qp->pri.update_vid = 0;
}
if (qp->alt.update_vid) {
if (err) {
if (qp->alt.candidate_vid < 0x1000)
mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
qp->alt.candidate_vid);
} else {
if (qp->alt.vid < 0x1000)
mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
qp->alt.vid);
qp->alt.vid = qp->alt.candidate_vid;
qp->alt.vlan_port = qp->alt.candidate_vlan_port;
qp->alt.vlan_index = qp->alt.candidate_vlan_index;
}
qp->alt.candidate_vid = 0xFFFF;
qp->alt.update_vid = 0;
}
return err;
}
int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
struct mlx4_ib_qp *qp = to_mqp(ibqp);
enum ib_qp_state cur_state, new_state;
int err = -EINVAL;
int ll;
mutex_lock(&qp->mutex);
cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
if (cur_state == new_state && cur_state == IB_QPS_RESET) {
ll = IB_LINK_LAYER_UNSPECIFIED;
} else {
int port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
ll = rdma_port_get_link_layer(&dev->ib_dev, port);
}
if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
attr_mask & ~IB_M_QP_MOD_VEND_MASK, ll)) {
pr_debug("qpn 0x%x: invalid attribute mask specified "
"for transition %d to %d. qp_type %d,"
" attr_mask 0x%x\n",
ibqp->qp_num, cur_state, new_state,
ibqp->qp_type, attr_mask);
goto out;
}
if ((attr_mask & IB_M_QP_MOD_VEND_MASK) && !dev->dev->caps.sync_qp) {
pr_err("extended verbs are not supported by %s\n",
dev->ib_dev.name);
goto out;
}
if ((attr_mask & IB_QP_PORT) &&
(attr->port_num == 0 || attr->port_num > dev->num_ports)) {
pr_debug("qpn 0x%x: invalid port number (%d) specified "
"for transition %d to %d. qp_type %d\n",
ibqp->qp_num, attr->port_num, cur_state,
new_state, ibqp->qp_type);
goto out;
}
if (attr_mask & IB_QP_PKEY_INDEX) {
int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
"for transition %d to %d. qp_type %d\n",
ibqp->qp_num, attr->pkey_index, cur_state,
new_state, ibqp->qp_type);
goto out;
}
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
"Transition %d to %d. qp_type %d\n",
ibqp->qp_num, attr->max_rd_atomic, cur_state,
new_state, ibqp->qp_type);
goto out;
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
"Transition %d to %d. qp_type %d\n",
ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
new_state, ibqp->qp_type);
goto out;
}
if (cur_state == new_state && cur_state == IB_QPS_RESET) {
err = 0;
goto out;
}
err = __mlx4_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
out:
mutex_unlock(&qp->mutex);
return err;
}
static int build_sriov_qp0_header(struct mlx4_ib_sqp *sqp,
struct ib_send_wr *wr,
void *wqe, unsigned *mlx_seg_len)
{
struct mlx4_ib_dev *mdev = to_mdev(sqp->qp.ibqp.device);
struct ib_device *ib_dev = &mdev->ib_dev;
struct mlx4_wqe_mlx_seg *mlx = wqe;
struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
u16 pkey;
u32 qkey;
int send_size;
int header_size;
int spc;
int i;
if (wr->opcode != IB_WR_SEND)
return -EINVAL;
send_size = 0;
for (i = 0; i < wr->num_sge; ++i)
send_size += wr->sg_list[i].length;
/* for proxy-qp0 sends, need to add in size of tunnel header */
/* for tunnel-qp0 sends, tunnel header is already in s/g list */
if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
send_size += sizeof (struct mlx4_ib_tunnel_header);
ib_ud_header_init(send_size, 1, 0, 0, 0, 0, &sqp->ud_header);
if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
sqp->ud_header.lrh.service_level =
be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
sqp->ud_header.lrh.destination_lid =
cpu_to_be16(ah->av.ib.g_slid & 0x7f);
sqp->ud_header.lrh.source_lid =
cpu_to_be16(ah->av.ib.g_slid & 0x7f);
}
mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
/* force loopback */
mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
mlx->rlid = sqp->ud_header.lrh.destination_lid;
sqp->ud_header.lrh.virtual_lane = 0;
sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
ib_get_cached_pkey(ib_dev, sqp->qp.port, 0, &pkey);
sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
if (sqp->qp.mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
else
sqp->ud_header.bth.destination_qpn =
cpu_to_be32(mdev->dev->caps.qp0_tunnel[sqp->qp.port - 1]);
sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
if (mlx4_get_parav_qkey(mdev->dev, sqp->qp.mqp.qpn, &qkey))
return -EINVAL;
sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.mqp.qpn);
sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
sqp->ud_header.immediate_present = 0;
header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
/*
* Inline data segments may not cross a 64 byte boundary. If
* our UD header is bigger than the space available up to the
* next 64 byte boundary in the WQE, use two inline data
* segments to hold the UD header.
*/
spc = MLX4_INLINE_ALIGN -
((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
if (header_size <= spc) {
inl->byte_count = cpu_to_be32(1 << 31 | header_size);
memcpy(inl + 1, sqp->header_buf, header_size);
i = 1;
} else {
inl->byte_count = cpu_to_be32(1 << 31 | spc);
memcpy(inl + 1, sqp->header_buf, spc);
inl = (void *) (inl + 1) + spc;
memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
/*
* Need a barrier here to make sure all the data is
* visible before the byte_count field is set.
* Otherwise the HCA prefetcher could grab the 64-byte
* chunk with this inline segment and get a valid (!=
* 0xffffffff) byte count but stale data, and end up
* generating a packet with bad headers.
*
* The first inline segment's byte_count field doesn't
* need a barrier, because it comes after a
* control/MLX segment and therefore is at an offset
* of 16 mod 64.
*/
wmb();
inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
i = 2;
}
*mlx_seg_len =
ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
return 0;
}
static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
void *wqe, unsigned *mlx_seg_len)
{
struct ib_device *ib_dev = sqp->qp.ibqp.device;
struct mlx4_wqe_mlx_seg *mlx = wqe;
struct mlx4_wqe_ctrl_seg *ctrl = wqe;
struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
union ib_gid sgid;
u16 pkey;
int send_size;
int header_size;
int spc;
int i;
int is_eth;
int is_vlan = 0;
int is_grh;
u16 uninitialized_var(vlan);
int err = 0;
send_size = 0;
for (i = 0; i < wr->num_sge; ++i)
send_size += wr->sg_list[i].length;
is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
is_grh = mlx4_ib_ah_grh_present(ah);
if (is_eth) {
if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
/* When multi-function is enabled, the ib_core gid
* indexes don't necessarily match the hw ones, so
* we must use our own cache */
err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
be32_to_cpu(ah->av.ib.port_pd) >> 24,
ah->av.ib.gid_index, &sgid.raw[0]);
if (err)
return err;
} else {
err = ib_get_cached_gid(ib_dev,
be32_to_cpu(ah->av.ib.port_pd) >> 24,
ah->av.ib.gid_index, &sgid);
if (err)
return err;
}
if (is_eth && ah->av.eth.vlan != 0xffff) {
vlan = cpu_to_be16(ah->av.eth.vlan) & 0x0fff;
is_vlan = 1;
}
}
ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh, 0, &sqp->ud_header);
if (!is_eth) {
sqp->ud_header.lrh.service_level =
be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
}
if (is_grh) {
sqp->ud_header.grh.traffic_class =
(be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
sqp->ud_header.grh.flow_label =
ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
if (is_eth)
memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
else {
if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
/* When multi-function is enabled, the ib_core gid
* indexes don't necessarily match the hw ones, so
* we must use our own cache */
sqp->ud_header.grh.source_gid.global.subnet_prefix =
to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
subnet_prefix;
sqp->ud_header.grh.source_gid.global.interface_id =
to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
guid_cache[ah->av.ib.gid_index];
} else
ib_get_cached_gid(ib_dev,
be32_to_cpu(ah->av.ib.port_pd) >> 24,
ah->av.ib.gid_index,
&sqp->ud_header.grh.source_gid);
}
memcpy(sqp->ud_header.grh.destination_gid.raw,
ah->av.ib.dgid, 16);
}
mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
if (!is_eth) {
mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
(sqp->ud_header.lrh.destination_lid ==
IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
(sqp->ud_header.lrh.service_level << 8));
if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
mlx->flags |= cpu_to_be32(0x1); /* force loopback */
mlx->rlid = sqp->ud_header.lrh.destination_lid;
}
switch (wr->opcode) {
case IB_WR_SEND:
sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
sqp->ud_header.immediate_present = 0;
break;
case IB_WR_SEND_WITH_IMM:
sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
sqp->ud_header.immediate_present = 1;
sqp->ud_header.immediate_data = wr->ex.imm_data;
break;
default:
return -EINVAL;
}
if (is_eth) {
u8 *smac;
struct in6_addr in6;
u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
mlx->sched_prio = cpu_to_be16(pcp);
memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
/* FIXME: cache smac value? */
memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
memcpy(&in6, sgid.raw, sizeof(in6));
if (!mlx4_is_mfunc(to_mdev(ib_dev)->dev))
smac = IF_LLADDR(to_mdev(sqp->qp.ibqp.device)->iboe.netdevs[sqp->qp.port - 1]);
else
smac = ah->av.eth.s_mac; /* use the src mac of the tunnel */
memcpy(sqp->ud_header.eth.smac_h, smac, 6);
if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
if (!is_vlan) {
sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
} else {
sqp->ud_header.vlan.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
}
} else {
sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
}
sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
if (!sqp->qp.ibqp.qp_num)
ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
else
ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
sqp->qkey : wr->wr.ud.remote_qkey);
sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
if (0) {
pr_err("built UD header of size %d:\n", header_size);
for (i = 0; i < header_size / 4; ++i) {
if (i % 8 == 0)
pr_err(" [%02x] ", i * 4);
pr_cont(" %08x",
be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
if ((i + 1) % 8 == 0)
pr_cont("\n");
}
pr_err("\n");
}
/*
* Inline data segments may not cross a 64 byte boundary. If
* our UD header is bigger than the space available up to the
* next 64 byte boundary in the WQE, use two inline data
* segments to hold the UD header.
*/
spc = MLX4_INLINE_ALIGN -
((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
if (header_size <= spc) {
inl->byte_count = cpu_to_be32(1 << 31 | header_size);
memcpy(inl + 1, sqp->header_buf, header_size);
i = 1;
} else {
inl->byte_count = cpu_to_be32(1 << 31 | spc);
memcpy(inl + 1, sqp->header_buf, spc);
inl = (void *) (inl + 1) + spc;
memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
/*
* Need a barrier here to make sure all the data is
* visible before the byte_count field is set.
* Otherwise the HCA prefetcher could grab the 64-byte
* chunk with this inline segment and get a valid (!=
* 0xffffffff) byte count but stale data, and end up
* generating a packet with bad headers.
*
* The first inline segment's byte_count field doesn't
* need a barrier, because it comes after a
* control/MLX segment and therefore is at an offset
* of 16 mod 64.
*/
wmb();
inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
i = 2;
}
*mlx_seg_len =
ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
return 0;
}
static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
{
unsigned cur;
struct mlx4_ib_cq *cq;
cur = wq->head - wq->tail;
if (likely(cur + nreq < wq->max_post))
return 0;
cq = to_mcq(ib_cq);
spin_lock(&cq->lock);
cur = wq->head - wq->tail;
spin_unlock(&cq->lock);
return cur + nreq >= wq->max_post;
}
static __be32 convert_access(int acc)
{
return (acc & IB_ACCESS_REMOTE_ATOMIC ?
cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
(acc & IB_ACCESS_REMOTE_WRITE ?
cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
(acc & IB_ACCESS_REMOTE_READ ?
cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
(acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
}
static void set_fmr_seg(struct mlx4_wqe_fmr_seg *fseg, struct ib_send_wr *wr)
{
struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
int i;
for (i = 0; i < wr->wr.fast_reg.page_list_len; ++i)
mfrpl->mapped_page_list[i] =
cpu_to_be64(wr->wr.fast_reg.page_list->page_list[i] |
MLX4_MTT_FLAG_PRESENT);
fseg->flags = convert_access(wr->wr.fast_reg.access_flags);
fseg->mem_key = cpu_to_be32(wr->wr.fast_reg.rkey);
fseg->buf_list = cpu_to_be64(mfrpl->map);
fseg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
fseg->reg_len = cpu_to_be64(wr->wr.fast_reg.length);
fseg->offset = 0; /* XXX -- is this just for ZBVA? */
fseg->page_size = cpu_to_be32(wr->wr.fast_reg.page_shift);
fseg->reserved[0] = 0;
fseg->reserved[1] = 0;
}
static void set_bind_seg(struct mlx4_wqe_bind_seg *bseg, struct ib_send_wr *wr)
{
bseg->flags1 =
convert_access(wr->wr.bind_mw.bind_info.mw_access_flags) &
cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ |
MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE |
MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC);
bseg->flags2 = 0;
if (wr->wr.bind_mw.mw->type == IB_MW_TYPE_2)
bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_TYPE_2);
if (wr->wr.bind_mw.bind_info.mw_access_flags & IB_ZERO_BASED)
bseg->flags2 |= cpu_to_be32(MLX4_WQE_BIND_ZERO_BASED);
bseg->new_rkey = cpu_to_be32(wr->wr.bind_mw.rkey);
bseg->lkey = cpu_to_be32(wr->wr.bind_mw.bind_info.mr->lkey);
bseg->addr = cpu_to_be64(wr->wr.bind_mw.bind_info.addr);
bseg->length = cpu_to_be64(wr->wr.bind_mw.bind_info.length);
}
static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
{
iseg->mem_key = cpu_to_be32(rkey);
iseg->reserved1 = 0;
iseg->reserved2 = 0;
iseg->reserved3[0] = 0;
iseg->reserved3[1] = 0;
}
static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
u64 remote_addr, u32 rkey)
{
rseg->raddr = cpu_to_be64(remote_addr);
rseg->rkey = cpu_to_be32(rkey);
rseg->reserved = 0;
}
static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
{
if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
} else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
} else {
aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
aseg->compare = 0;
}
}
static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
struct ib_send_wr *wr)
{
aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
}
static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
struct ib_send_wr *wr)
{
memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
memcpy(dseg->mac, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
}
static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
struct mlx4_wqe_datagram_seg *dseg,
struct ib_send_wr *wr, enum ib_qp_type qpt)
{
union mlx4_ext_av *av = &to_mah(wr->wr.ud.ah)->av;
struct mlx4_av sqp_av = {0};
int port = *((u8 *) &av->ib.port_pd) & 0x3;
/* force loopback */
sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
cpu_to_be32(0xf0000000);
memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
/* This function used only for sending on QP1 proxies */
dseg->dqpn = cpu_to_be32(dev->dev->caps.qp1_tunnel[port - 1]);
/* Use QKEY from the QP context, which is set by master */
dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
}
static void build_tunnel_header(struct ib_send_wr *wr, void *wqe, unsigned *mlx_seg_len)
{
struct mlx4_wqe_inline_seg *inl = wqe;
struct mlx4_ib_tunnel_header hdr;
struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
int spc;
int i;
memcpy(&hdr.av, &ah->av, sizeof hdr.av);
hdr.remote_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
hdr.pkey_index = cpu_to_be16(wr->wr.ud.pkey_index);
hdr.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
memcpy(hdr.mac, ah->av.eth.mac, 6);
hdr.vlan = cpu_to_be16(ah->av.eth.vlan);
spc = MLX4_INLINE_ALIGN -
((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
if (sizeof (hdr) <= spc) {
memcpy(inl + 1, &hdr, sizeof (hdr));
wmb();
inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
i = 1;
} else {
memcpy(inl + 1, &hdr, spc);
wmb();
inl->byte_count = cpu_to_be32(1 << 31 | spc);
inl = (void *) (inl + 1) + spc;
memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
wmb();
inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
i = 2;
}
*mlx_seg_len =
ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
}
static void set_mlx_icrc_seg(void *dseg)
{
u32 *t = dseg;
struct mlx4_wqe_inline_seg *iseg = dseg;
t[1] = 0;
/*
* Need a barrier here before writing the byte_count field to
* make sure that all the data is visible before the
* byte_count field is set. Otherwise, if the segment begins
* a new cacheline, the HCA prefetcher could grab the 64-byte
* chunk and get a valid (!= * 0xffffffff) byte count but
* stale data, and end up sending the wrong data.
*/
wmb();
iseg->byte_count = cpu_to_be32((1 << 31) | 4);
}
static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
{
dseg->lkey = cpu_to_be32(sg->lkey);
dseg->addr = cpu_to_be64(sg->addr);
/*
* Need a barrier here before writing the byte_count field to
* make sure that all the data is visible before the
* byte_count field is set. Otherwise, if the segment begins
* a new cacheline, the HCA prefetcher could grab the 64-byte
* chunk and get a valid (!= * 0xffffffff) byte count but
* stale data, and end up sending the wrong data.
*/
wmb();
dseg->byte_count = cpu_to_be32(sg->length);
}
static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
{
dseg->byte_count = cpu_to_be32(sg->length);
dseg->lkey = cpu_to_be32(sg->lkey);
dseg->addr = cpu_to_be64(sg->addr);
}
static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe, struct ib_send_wr *wr,
struct mlx4_ib_qp *qp, unsigned *lso_seg_len,
__be32 *lso_hdr_sz, __be32 *blh)
{
unsigned halign = ALIGN(sizeof *wqe + wr->wr.ud.hlen, 16);
if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
*blh = cpu_to_be32(1 << 6);
if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
wr->num_sge > qp->sq.max_gs - (halign >> 4)))
return -EINVAL;
memcpy(wqe->header, wr->wr.ud.header, wr->wr.ud.hlen);
*lso_hdr_sz = cpu_to_be32((wr->wr.ud.mss - wr->wr.ud.hlen) << 16 |
wr->wr.ud.hlen);
*lso_seg_len = halign;
return 0;
}
static __be32 send_ieth(struct ib_send_wr *wr)
{
switch (wr->opcode) {
case IB_WR_SEND_WITH_IMM:
case IB_WR_RDMA_WRITE_WITH_IMM:
return wr->ex.imm_data;
case IB_WR_SEND_WITH_INV:
return cpu_to_be32(wr->ex.invalidate_rkey);
default:
return 0;
}
}
static void add_zero_len_inline(void *wqe)
{
struct mlx4_wqe_inline_seg *inl = wqe;
memset(wqe, 0, 16);
inl->byte_count = cpu_to_be32(1 << 31);
}
static int lay_inline_data(struct mlx4_ib_qp *qp, struct ib_send_wr *wr,
void *wqe, int *sz)
{
struct mlx4_wqe_inline_seg *seg;
void *addr;
int len, seg_len;
int num_seg;
int off, to_copy;
int i;
int inl = 0;
seg = wqe;
wqe += sizeof *seg;
off = ((unsigned long)wqe) & (unsigned long)(MLX4_INLINE_ALIGN - 1);
num_seg = 0;
seg_len = 0;
for (i = 0; i < wr->num_sge; ++i) {
addr = (void *) (unsigned long)(wr->sg_list[i].addr);
len = wr->sg_list[i].length;
inl += len;
if (inl > qp->max_inline_data) {
inl = 0;
return -1;
}
while (len >= MLX4_INLINE_ALIGN - off) {
to_copy = MLX4_INLINE_ALIGN - off;
memcpy(wqe, addr, to_copy);
len -= to_copy;
wqe += to_copy;
addr += to_copy;
seg_len += to_copy;
wmb(); /* see comment below */
seg->byte_count = htonl(MLX4_INLINE_SEG | seg_len);
seg_len = 0;
seg = wqe;
wqe += sizeof *seg;
off = sizeof *seg;
++num_seg;
}
memcpy(wqe, addr, len);
wqe += len;
seg_len += len;
off += len;
}
if (seg_len) {
++num_seg;
/*
* Need a barrier here to make sure
* all the data is visible before the
* byte_count field is set. Otherwise
* the HCA prefetcher could grab the
* 64-byte chunk with this inline
* segment and get a valid (!=
* 0xffffffff) byte count but stale
* data, and end up sending the wrong
* data.
*/
wmb();
seg->byte_count = htonl(MLX4_INLINE_SEG | seg_len);
}
*sz = (inl + num_seg * sizeof *seg + 15) / 16;
return 0;
}
/*
* Avoid using memcpy() to copy to BlueFlame page, since memcpy()
* implementations may use move-string-buffer assembler instructions,
* which do not guarantee order of copying.
*/
static void mlx4_bf_copy(unsigned long *dst, unsigned long *src,
unsigned bytecnt)
{
__iowrite64_copy(dst, src, bytecnt / 8);
}
int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
{
struct mlx4_ib_qp *qp = to_mqp(ibqp);
void *wqe;
struct mlx4_wqe_ctrl_seg *uninitialized_var(ctrl);
struct mlx4_wqe_data_seg *dseg;
unsigned long flags;
int nreq;
int err = 0;
unsigned ind;
int uninitialized_var(stamp);
int uninitialized_var(size);
unsigned uninitialized_var(seglen);
__be32 dummy;
__be32 *lso_wqe;
__be32 uninitialized_var(lso_hdr_sz);
__be32 blh;
int i;
int inl = 0;
spin_lock_irqsave(&qp->sq.lock, flags);
ind = qp->sq_next_wqe;
for (nreq = 0; wr; ++nreq, wr = wr->next) {
lso_wqe = &dummy;
blh = 0;
if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
err = -ENOMEM;
*bad_wr = wr;
goto out;
}
if (unlikely(wr->num_sge > qp->sq.max_gs)) {
err = -EINVAL;
*bad_wr = wr;
goto out;
}
ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
*((u32 *) (&ctrl->vlan_tag)) = 0;
qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
ctrl->srcrb_flags =
(wr->send_flags & IB_SEND_SIGNALED ?
cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
(wr->send_flags & IB_SEND_SOLICITED ?
cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
((wr->send_flags & IB_SEND_IP_CSUM) ?
cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
qp->sq_signal_bits;
ctrl->imm = send_ieth(wr);
wqe += sizeof *ctrl;
size = sizeof *ctrl / 16;
switch (qp->mlx4_ib_qp_type) {
case MLX4_IB_QPT_RC:
case MLX4_IB_QPT_UC:
switch (wr->opcode) {
case IB_WR_ATOMIC_CMP_AND_SWP:
case IB_WR_ATOMIC_FETCH_AND_ADD:
case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
wr->wr.atomic.rkey);
wqe += sizeof (struct mlx4_wqe_raddr_seg);
set_atomic_seg(wqe, wr);
wqe += sizeof (struct mlx4_wqe_atomic_seg);
size += (sizeof (struct mlx4_wqe_raddr_seg) +
sizeof (struct mlx4_wqe_atomic_seg)) / 16;
break;
case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
set_raddr_seg(wqe, wr->wr.atomic.remote_addr,
wr->wr.atomic.rkey);
wqe += sizeof (struct mlx4_wqe_raddr_seg);
set_masked_atomic_seg(wqe, wr);
wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
size += (sizeof (struct mlx4_wqe_raddr_seg) +
sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
break;
case IB_WR_RDMA_READ:
case IB_WR_RDMA_WRITE:
case IB_WR_RDMA_WRITE_WITH_IMM:
set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
wr->wr.rdma.rkey);
wqe += sizeof (struct mlx4_wqe_raddr_seg);
size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
break;
case IB_WR_LOCAL_INV:
ctrl->srcrb_flags |=
cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
wqe += sizeof (struct mlx4_wqe_local_inval_seg);
size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
break;
case IB_WR_FAST_REG_MR:
ctrl->srcrb_flags |=
cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
set_fmr_seg(wqe, wr);
wqe += sizeof (struct mlx4_wqe_fmr_seg);
size += sizeof (struct mlx4_wqe_fmr_seg) / 16;
break;
case IB_WR_BIND_MW:
ctrl->srcrb_flags |=
cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
set_bind_seg(wqe, wr);
wqe += sizeof(struct mlx4_wqe_bind_seg);
size += sizeof(struct mlx4_wqe_bind_seg) / 16;
default:
/* No extra segments required for sends */
break;
}
break;
case MLX4_IB_QPT_TUN_SMI_OWNER:
err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
if (unlikely(err)) {
*bad_wr = wr;
goto out;
}
wqe += seglen;
size += seglen / 16;
break;
case MLX4_IB_QPT_TUN_SMI:
case MLX4_IB_QPT_TUN_GSI:
/* this is a UD qp used in MAD responses to slaves. */
set_datagram_seg(wqe, wr);
/* set the forced-loopback bit in the data seg av */
*(__be32 *) wqe |= cpu_to_be32(0x80000000);
wqe += sizeof (struct mlx4_wqe_datagram_seg);
size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
break;
case MLX4_IB_QPT_UD:
set_datagram_seg(wqe, wr);
wqe += sizeof (struct mlx4_wqe_datagram_seg);
size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
if (wr->opcode == IB_WR_LSO) {
err = build_lso_seg(wqe, wr, qp, &seglen, &lso_hdr_sz, &blh);
if (unlikely(err)) {
*bad_wr = wr;
goto out;
}
lso_wqe = (__be32 *) wqe;
wqe += seglen;
size += seglen / 16;
}
break;
case MLX4_IB_QPT_PROXY_SMI_OWNER:
if (unlikely(!mlx4_is_master(to_mdev(ibqp->device)->dev))) {
err = -ENOSYS;
*bad_wr = wr;
goto out;
}
err = build_sriov_qp0_header(to_msqp(qp), wr, ctrl, &seglen);
if (unlikely(err)) {
*bad_wr = wr;
goto out;
}
wqe += seglen;
size += seglen / 16;
/* to start tunnel header on a cache-line boundary */
add_zero_len_inline(wqe);
wqe += 16;
size++;
build_tunnel_header(wr, wqe, &seglen);
wqe += seglen;
size += seglen / 16;
break;
case MLX4_IB_QPT_PROXY_SMI:
/* don't allow QP0 sends on guests */
err = -ENOSYS;
*bad_wr = wr;
goto out;
case MLX4_IB_QPT_PROXY_GSI:
/* If we are tunneling special qps, this is a UD qp.
* In this case we first add a UD segment targeting
* the tunnel qp, and then add a header with address
* information */
set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe, wr, ibqp->qp_type);
wqe += sizeof (struct mlx4_wqe_datagram_seg);
size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
build_tunnel_header(wr, wqe, &seglen);
wqe += seglen;
size += seglen / 16;
break;
case MLX4_IB_QPT_SMI:
case MLX4_IB_QPT_GSI:
err = build_mlx_header(to_msqp(qp), wr, ctrl, &seglen);
if (unlikely(err)) {
*bad_wr = wr;
goto out;
}
wqe += seglen;
size += seglen / 16;
break;
default:
break;
}
/*
* Write data segments in reverse order, so as to
* overwrite cacheline stamp last within each
* cacheline. This avoids issues with WQE
* prefetching.
*/
dseg = wqe;
dseg += wr->num_sge - 1;
/* Add one more inline data segment for ICRC for MLX sends */
if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
qp->mlx4_ib_qp_type &
(MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
set_mlx_icrc_seg(dseg + 1);
size += sizeof (struct mlx4_wqe_data_seg) / 16;
}
if (wr->send_flags & IB_SEND_INLINE && wr->num_sge) {
int sz;
err = lay_inline_data(qp, wr, wqe, &sz);
if (!err) {
inl = 1;
size += sz;
}
} else {
size += wr->num_sge *
(sizeof(struct mlx4_wqe_data_seg) / 16);
for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
set_data_seg(dseg, wr->sg_list + i);
}
/*
* Possibly overwrite stamping in cacheline with LSO
* segment only after making sure all data segments
* are written.
*/
wmb();
*lso_wqe = lso_hdr_sz;
ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
MLX4_WQE_CTRL_FENCE : 0) | size;
/*
* Make sure descriptor is fully written before
* setting ownership bit (because HW can start
* executing as soon as we do).
*/
wmb();
if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
*bad_wr = wr;
err = -EINVAL;
goto out;
}
ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
(ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
stamp = ind + qp->sq_spare_wqes;
ind += DIV_ROUND_UP(size * 16, 1U << qp->sq.wqe_shift);
/*
* We can improve latency by not stamping the last
* send queue WQE until after ringing the doorbell, so
* only stamp here if there are still more WQEs to post.
*
* Same optimization applies to padding with NOP wqe
* in case of WQE shrinking (used to prevent wrap-around
* in the middle of WR).
*/
if (wr->next) {
stamp_send_wqe(qp, stamp, size * 16);
ind = pad_wraparound(qp, ind);
}
}
out:
if (nreq == 1 && inl && size > 1 && size < qp->bf.buf_size / 16) {
ctrl->owner_opcode |= htonl((qp->sq_next_wqe & 0xffff) << 8);
/* We set above doorbell_qpn bits to 0 as part of vlan
* tag initialization, so |= should be correct.
*/
*(u32 *) (&ctrl->vlan_tag) |= qp->doorbell_qpn;
/*
* Make sure that descriptor is written to memory
* before writing to BlueFlame page.
*/
wmb();
++qp->sq.head;
mlx4_bf_copy(qp->bf.reg + qp->bf.offset, (unsigned long *) ctrl,
ALIGN(size * 16, 64));
wc_wmb();
qp->bf.offset ^= qp->bf.buf_size;
} else if (nreq) {
qp->sq.head += nreq;
/*
* Make sure that descriptors are written before
* doorbell record.
*/
wmb();
writel(qp->doorbell_qpn, qp->bf.uar->map + MLX4_SEND_DOORBELL);
/*
* Make sure doorbells don't leak out of SQ spinlock
* and reach the HCA out of order.
*/
mmiowb();
}
if (likely(nreq)) {
stamp_send_wqe(qp, stamp, size * 16);
ind = pad_wraparound(qp, ind);
qp->sq_next_wqe = ind;
}
spin_unlock_irqrestore(&qp->sq.lock, flags);
return err;
}
int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr)
{
struct mlx4_ib_qp *qp = to_mqp(ibqp);
struct mlx4_wqe_data_seg *scat;
unsigned long flags;
int err = 0;
int nreq;
int ind;
int max_gs;
int i;
max_gs = qp->rq.max_gs;
spin_lock_irqsave(&qp->rq.lock, flags);
ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
for (nreq = 0; wr; ++nreq, wr = wr->next) {
if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
err = -ENOMEM;
*bad_wr = wr;
goto out;
}
if (unlikely(wr->num_sge > qp->rq.max_gs)) {
err = -EINVAL;
*bad_wr = wr;
goto out;
}
scat = get_recv_wqe(qp, ind);
if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
ib_dma_sync_single_for_device(ibqp->device,
qp->sqp_proxy_rcv[ind].map,
sizeof (struct mlx4_ib_proxy_sqp_hdr),
DMA_FROM_DEVICE);
scat->byte_count =
cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
/* use dma lkey from upper layer entry */
scat->lkey = cpu_to_be32(wr->sg_list->lkey);
scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
scat++;
max_gs--;
}
for (i = 0; i < wr->num_sge; ++i)
__set_data_seg(scat + i, wr->sg_list + i);
if (i < max_gs) {
scat[i].byte_count = 0;
scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
scat[i].addr = 0;
}
qp->rq.wrid[ind] = wr->wr_id;
ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
}
out:
if (likely(nreq)) {
qp->rq.head += nreq;
/*
* Make sure that descriptors are written before
* doorbell record.
*/
wmb();
*qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
}
spin_unlock_irqrestore(&qp->rq.lock, flags);
return err;
}
static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
{
switch (mlx4_state) {
case MLX4_QP_STATE_RST: return IB_QPS_RESET;
case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
case MLX4_QP_STATE_SQ_DRAINING:
case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
default: return -1;
}
}
static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
{
switch (mlx4_mig_state) {
case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
case MLX4_QP_PM_REARM: return IB_MIG_REARM;
case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
default: return -1;
}
}
static int to_ib_qp_access_flags(int mlx4_flags)
{
int ib_flags = 0;
if (mlx4_flags & MLX4_QP_BIT_RRE)
ib_flags |= IB_ACCESS_REMOTE_READ;
if (mlx4_flags & MLX4_QP_BIT_RWE)
ib_flags |= IB_ACCESS_REMOTE_WRITE;
if (mlx4_flags & MLX4_QP_BIT_RAE)
ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
return ib_flags;
}
static void to_ib_ah_attr(struct mlx4_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
struct mlx4_qp_path *path)
{
struct mlx4_dev *dev = ibdev->dev;
int is_eth;
memset(ib_ah_attr, 0, sizeof *ib_ah_attr);
ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1;
if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
return;
is_eth = rdma_port_get_link_layer(&ibdev->ib_dev, ib_ah_attr->port_num) ==
IB_LINK_LAYER_ETHERNET;
if (is_eth)
ib_ah_attr->sl = ((path->sched_queue >> 3) & 0x7) |
((path->sched_queue & 4) << 1);
else
ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf;
ib_ah_attr->dlid = be16_to_cpu(path->rlid);
ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f;
ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0;
if (ib_ah_attr->ah_flags) {
ib_ah_attr->grh.sgid_index = path->mgid_index;
ib_ah_attr->grh.hop_limit = path->hop_limit;
ib_ah_attr->grh.traffic_class =
(be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
ib_ah_attr->grh.flow_label =
be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
memcpy(ib_ah_attr->grh.dgid.raw,
path->rgid, sizeof ib_ah_attr->grh.dgid.raw);
}
}
int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
struct ib_qp_init_attr *qp_init_attr)
{
struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
struct mlx4_ib_qp *qp = to_mqp(ibqp);
struct mlx4_qp_context context;
int mlx4_state;
int err = 0;
mutex_lock(&qp->mutex);
if (qp->state == IB_QPS_RESET) {
qp_attr->qp_state = IB_QPS_RESET;
goto done;
}
err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
if (err) {
err = -EINVAL;
goto out;
}
mlx4_state = be32_to_cpu(context.flags) >> 28;
qp->state = to_ib_qp_state(mlx4_state);
qp_attr->qp_state = qp->state;
qp_attr->path_mtu = context.mtu_msgmax >> 5;
qp_attr->path_mig_state =
to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
qp_attr->qkey = be32_to_cpu(context.qkey);
qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
qp_attr->qp_access_flags =
to_ib_qp_access_flags(be32_to_cpu(context.params2));
if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
to_ib_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
}
qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
if (qp_attr->qp_state == IB_QPS_INIT)
qp_attr->port_num = qp->port;
else
qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
/* qp_attr->en_sqd_async_notify is only applicable in modify qp */
qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
qp_attr->max_dest_rd_atomic =
1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
qp_attr->min_rnr_timer =
(be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
qp_attr->timeout = context.pri_path.ackto >> 3;
qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
qp_attr->alt_timeout = context.alt_path.ackto >> 3;
done:
qp_attr->cur_qp_state = qp_attr->qp_state;
qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
qp_attr->cap.max_recv_sge = qp->rq.max_gs;
if (!ibqp->uobject) {
qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
qp_attr->cap.max_send_sge = qp->sq.max_gs;
} else {
qp_attr->cap.max_send_wr = 0;
qp_attr->cap.max_send_sge = 0;
}
/*
* We don't support inline sends for kernel QPs (yet), and we
* don't know what userspace's value should be.
*/
qp_attr->cap.max_inline_data = 0;
qp_init_attr->cap = qp_attr->cap;
qp_init_attr->create_flags = 0;
if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
if (qp->flags & MLX4_IB_QP_LSO)
qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
if (qp->flags & MLX4_IB_QP_NETIF)
qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
qp_init_attr->sq_sig_type =
qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
if (qp->flags & MLX4_IB_QP_CAP_CROSS_CHANNEL)
qp_init_attr->create_flags |= IB_QP_CREATE_CROSS_CHANNEL;
if (qp->flags & MLX4_IB_QP_CAP_MANAGED_SEND)
qp_init_attr->create_flags |= IB_QP_CREATE_MANAGED_SEND;
if (qp->flags & MLX4_IB_QP_CAP_MANAGED_RECV)
qp_init_attr->create_flags |= IB_QP_CREATE_MANAGED_RECV;
qp_init_attr->qpg_type = ibqp->qpg_type;
if (ibqp->qpg_type == IB_QPG_PARENT)
qp_init_attr->cap.qpg_tss_mask_sz = qp->qpg_data->qpg_tss_mask_sz;
else
qp_init_attr->cap.qpg_tss_mask_sz = 0;
out:
mutex_unlock(&qp->mutex);
return err;
}
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