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linux/drivers/infiniband/hw/mthca/mthca_qp.c
Bart Van Assche d34ac5cd3a RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const 
Since neither ib_post_send() nor ib_post_recv() modify the data structure
their second argument points at, declare that argument const. This change
makes it necessary to declare the 'bad_wr' argument const too and also to
modify all ULPs that call ib_post_send(), ib_post_recv() or
ib_post_srq_recv(). This patch does not change any functionality but makes
it possible for the compiler to verify whether the
ib_post_(send|recv|srq_recv) really do not modify the posted work request.

To make this possible, only one cast had to be introduce that casts away
constness, namely in rpcrdma_post_recvs(). The only way I can think of to
avoid that cast is to introduce an additional loop in that function or to
change the data type of bad_wr from struct ib_recv_wr ** into int
(an index that refers to an element in the work request list). However,
both approaches would require even more extensive changes than this
patch.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-30 20:09:34 -06:00

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/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Cisco Systems. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
* Copyright (c) 2004 Voltaire, Inc. 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/string.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <asm/io.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
#include "mthca_dev.h"
#include "mthca_cmd.h"
#include "mthca_memfree.h"
#include "mthca_wqe.h"
enum {
MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE,
MTHCA_ACK_REQ_FREQ = 10,
MTHCA_FLIGHT_LIMIT = 9,
MTHCA_UD_HEADER_SIZE = 72, /* largest UD header possible */
MTHCA_INLINE_HEADER_SIZE = 4, /* data segment overhead for inline */
MTHCA_INLINE_CHUNK_SIZE = 16 /* inline data segment chunk */
};
enum {
MTHCA_QP_STATE_RST = 0,
MTHCA_QP_STATE_INIT = 1,
MTHCA_QP_STATE_RTR = 2,
MTHCA_QP_STATE_RTS = 3,
MTHCA_QP_STATE_SQE = 4,
MTHCA_QP_STATE_SQD = 5,
MTHCA_QP_STATE_ERR = 6,
MTHCA_QP_STATE_DRAINING = 7
};
enum {
MTHCA_QP_ST_RC = 0x0,
MTHCA_QP_ST_UC = 0x1,
MTHCA_QP_ST_RD = 0x2,
MTHCA_QP_ST_UD = 0x3,
MTHCA_QP_ST_MLX = 0x7
};
enum {
MTHCA_QP_PM_MIGRATED = 0x3,
MTHCA_QP_PM_ARMED = 0x0,
MTHCA_QP_PM_REARM = 0x1
};
enum {
/* qp_context flags */
MTHCA_QP_BIT_DE = 1 << 8,
/* params1 */
MTHCA_QP_BIT_SRE = 1 << 15,
MTHCA_QP_BIT_SWE = 1 << 14,
MTHCA_QP_BIT_SAE = 1 << 13,
MTHCA_QP_BIT_SIC = 1 << 4,
MTHCA_QP_BIT_SSC = 1 << 3,
/* params2 */
MTHCA_QP_BIT_RRE = 1 << 15,
MTHCA_QP_BIT_RWE = 1 << 14,
MTHCA_QP_BIT_RAE = 1 << 13,
MTHCA_QP_BIT_RIC = 1 << 4,
MTHCA_QP_BIT_RSC = 1 << 3
};
enum {
MTHCA_SEND_DOORBELL_FENCE = 1 << 5
};
struct mthca_qp_path {
__be32 port_pkey;
u8 rnr_retry;
u8 g_mylmc;
__be16 rlid;
u8 ackto;
u8 mgid_index;
u8 static_rate;
u8 hop_limit;
__be32 sl_tclass_flowlabel;
u8 rgid[16];
} __attribute__((packed));
struct mthca_qp_context {
__be32 flags;
__be32 tavor_sched_queue; /* Reserved on Arbel */
u8 mtu_msgmax;
u8 rq_size_stride; /* Reserved on Tavor */
u8 sq_size_stride; /* Reserved on Tavor */
u8 rlkey_arbel_sched_queue; /* Reserved on Tavor */
__be32 usr_page;
__be32 local_qpn;
__be32 remote_qpn;
u32 reserved1[2];
struct mthca_qp_path pri_path;
struct mthca_qp_path alt_path;
__be32 rdd;
__be32 pd;
__be32 wqe_base;
__be32 wqe_lkey;
__be32 params1;
__be32 reserved2;
__be32 next_send_psn;
__be32 cqn_snd;
__be32 snd_wqe_base_l; /* Next send WQE on Tavor */
__be32 snd_db_index; /* (debugging only entries) */
__be32 last_acked_psn;
__be32 ssn;
__be32 params2;
__be32 rnr_nextrecvpsn;
__be32 ra_buff_indx;
__be32 cqn_rcv;
__be32 rcv_wqe_base_l; /* Next recv WQE on Tavor */
__be32 rcv_db_index; /* (debugging only entries) */
__be32 qkey;
__be32 srqn;
__be32 rmsn;
__be16 rq_wqe_counter; /* reserved on Tavor */
__be16 sq_wqe_counter; /* reserved on Tavor */
u32 reserved3[18];
} __attribute__((packed));
struct mthca_qp_param {
__be32 opt_param_mask;
u32 reserved1;
struct mthca_qp_context context;
u32 reserved2[62];
} __attribute__((packed));
enum {
MTHCA_QP_OPTPAR_ALT_ADDR_PATH = 1 << 0,
MTHCA_QP_OPTPAR_RRE = 1 << 1,
MTHCA_QP_OPTPAR_RAE = 1 << 2,
MTHCA_QP_OPTPAR_RWE = 1 << 3,
MTHCA_QP_OPTPAR_PKEY_INDEX = 1 << 4,
MTHCA_QP_OPTPAR_Q_KEY = 1 << 5,
MTHCA_QP_OPTPAR_RNR_TIMEOUT = 1 << 6,
MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH = 1 << 7,
MTHCA_QP_OPTPAR_SRA_MAX = 1 << 8,
MTHCA_QP_OPTPAR_RRA_MAX = 1 << 9,
MTHCA_QP_OPTPAR_PM_STATE = 1 << 10,
MTHCA_QP_OPTPAR_PORT_NUM = 1 << 11,
MTHCA_QP_OPTPAR_RETRY_COUNT = 1 << 12,
MTHCA_QP_OPTPAR_ALT_RNR_RETRY = 1 << 13,
MTHCA_QP_OPTPAR_ACK_TIMEOUT = 1 << 14,
MTHCA_QP_OPTPAR_RNR_RETRY = 1 << 15,
MTHCA_QP_OPTPAR_SCHED_QUEUE = 1 << 16
};
static const u8 mthca_opcode[] = {
[IB_WR_SEND] = MTHCA_OPCODE_SEND,
[IB_WR_SEND_WITH_IMM] = MTHCA_OPCODE_SEND_IMM,
[IB_WR_RDMA_WRITE] = MTHCA_OPCODE_RDMA_WRITE,
[IB_WR_RDMA_WRITE_WITH_IMM] = MTHCA_OPCODE_RDMA_WRITE_IMM,
[IB_WR_RDMA_READ] = MTHCA_OPCODE_RDMA_READ,
[IB_WR_ATOMIC_CMP_AND_SWP] = MTHCA_OPCODE_ATOMIC_CS,
[IB_WR_ATOMIC_FETCH_AND_ADD] = MTHCA_OPCODE_ATOMIC_FA,
};
static int is_sqp(struct mthca_dev *dev, struct mthca_qp *qp)
{
return qp->qpn >= dev->qp_table.sqp_start &&
qp->qpn <= dev->qp_table.sqp_start + 3;
}
static int is_qp0(struct mthca_dev *dev, struct mthca_qp *qp)
{
return qp->qpn >= dev->qp_table.sqp_start &&
qp->qpn <= dev->qp_table.sqp_start + 1;
}
static void *get_recv_wqe(struct mthca_qp *qp, int n)
{
if (qp->is_direct)
return qp->queue.direct.buf + (n << qp->rq.wqe_shift);
else
return qp->queue.page_list[(n << qp->rq.wqe_shift) >> PAGE_SHIFT].buf +
((n << qp->rq.wqe_shift) & (PAGE_SIZE - 1));
}
static void *get_send_wqe(struct mthca_qp *qp, int n)
{
if (qp->is_direct)
return qp->queue.direct.buf + qp->send_wqe_offset +
(n << qp->sq.wqe_shift);
else
return qp->queue.page_list[(qp->send_wqe_offset +
(n << qp->sq.wqe_shift)) >>
PAGE_SHIFT].buf +
((qp->send_wqe_offset + (n << qp->sq.wqe_shift)) &
(PAGE_SIZE - 1));
}
static void mthca_wq_reset(struct mthca_wq *wq)
{
wq->next_ind = 0;
wq->last_comp = wq->max - 1;
wq->head = 0;
wq->tail = 0;
}
void mthca_qp_event(struct mthca_dev *dev, u32 qpn,
enum ib_event_type event_type)
{
struct mthca_qp *qp;
struct ib_event event;
spin_lock(&dev->qp_table.lock);
qp = mthca_array_get(&dev->qp_table.qp, qpn & (dev->limits.num_qps - 1));
if (qp)
++qp->refcount;
spin_unlock(&dev->qp_table.lock);
if (!qp) {
mthca_warn(dev, "Async event %d for bogus QP %08x\n",
event_type, qpn);
return;
}
if (event_type == IB_EVENT_PATH_MIG)
qp->port = qp->alt_port;
event.device = &dev->ib_dev;
event.event = event_type;
event.element.qp = &qp->ibqp;
if (qp->ibqp.event_handler)
qp->ibqp.event_handler(&event, qp->ibqp.qp_context);
spin_lock(&dev->qp_table.lock);
if (!--qp->refcount)
wake_up(&qp->wait);
spin_unlock(&dev->qp_table.lock);
}
static int to_mthca_state(enum ib_qp_state ib_state)
{
switch (ib_state) {
case IB_QPS_RESET: return MTHCA_QP_STATE_RST;
case IB_QPS_INIT: return MTHCA_QP_STATE_INIT;
case IB_QPS_RTR: return MTHCA_QP_STATE_RTR;
case IB_QPS_RTS: return MTHCA_QP_STATE_RTS;
case IB_QPS_SQD: return MTHCA_QP_STATE_SQD;
case IB_QPS_SQE: return MTHCA_QP_STATE_SQE;
case IB_QPS_ERR: return MTHCA_QP_STATE_ERR;
default: return -1;
}
}
enum { RC, UC, UD, RD, RDEE, MLX, NUM_TRANS };
static int to_mthca_st(int transport)
{
switch (transport) {
case RC: return MTHCA_QP_ST_RC;
case UC: return MTHCA_QP_ST_UC;
case UD: return MTHCA_QP_ST_UD;
case RD: return MTHCA_QP_ST_RD;
case MLX: return MTHCA_QP_ST_MLX;
default: return -1;
}
}
static void store_attrs(struct mthca_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 init_port(struct mthca_dev *dev, int port)
{
int err;
struct mthca_init_ib_param param;
memset(&param, 0, sizeof param);
param.port_width = dev->limits.port_width_cap;
param.vl_cap = dev->limits.vl_cap;
param.mtu_cap = dev->limits.mtu_cap;
param.gid_cap = dev->limits.gid_table_len;
param.pkey_cap = dev->limits.pkey_table_len;
err = mthca_INIT_IB(dev, &param, port);
if (err)
mthca_warn(dev, "INIT_IB failed, return code %d.\n", err);
}
static __be32 get_hw_access_flags(struct mthca_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 |= MTHCA_QP_BIT_RRE;
if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
hw_access_flags |= MTHCA_QP_BIT_RAE;
if (access_flags & IB_ACCESS_REMOTE_WRITE)
hw_access_flags |= MTHCA_QP_BIT_RWE;
return cpu_to_be32(hw_access_flags);
}
static inline enum ib_qp_state to_ib_qp_state(int mthca_state)
{
switch (mthca_state) {
case MTHCA_QP_STATE_RST: return IB_QPS_RESET;
case MTHCA_QP_STATE_INIT: return IB_QPS_INIT;
case MTHCA_QP_STATE_RTR: return IB_QPS_RTR;
case MTHCA_QP_STATE_RTS: return IB_QPS_RTS;
case MTHCA_QP_STATE_DRAINING:
case MTHCA_QP_STATE_SQD: return IB_QPS_SQD;
case MTHCA_QP_STATE_SQE: return IB_QPS_SQE;
case MTHCA_QP_STATE_ERR: return IB_QPS_ERR;
default: return -1;
}
}
static inline enum ib_mig_state to_ib_mig_state(int mthca_mig_state)
{
switch (mthca_mig_state) {
case 0: return IB_MIG_ARMED;
case 1: return IB_MIG_REARM;
case 3: return IB_MIG_MIGRATED;
default: return -1;
}
}
static int to_ib_qp_access_flags(int mthca_flags)
{
int ib_flags = 0;
if (mthca_flags & MTHCA_QP_BIT_RRE)
ib_flags |= IB_ACCESS_REMOTE_READ;
if (mthca_flags & MTHCA_QP_BIT_RWE)
ib_flags |= IB_ACCESS_REMOTE_WRITE;
if (mthca_flags & MTHCA_QP_BIT_RAE)
ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
return ib_flags;
}
static void to_rdma_ah_attr(struct mthca_dev *dev,
struct rdma_ah_attr *ah_attr,
struct mthca_qp_path *path)
{
u8 port_num = (be32_to_cpu(path->port_pkey) >> 24) & 0x3;
memset(ah_attr, 0, sizeof(*ah_attr));
if (port_num == 0 || port_num > dev->limits.num_ports)
return;
ah_attr->type = rdma_ah_find_type(&dev->ib_dev, port_num);
rdma_ah_set_port_num(ah_attr, port_num);
rdma_ah_set_dlid(ah_attr, be16_to_cpu(path->rlid));
rdma_ah_set_sl(ah_attr, be32_to_cpu(path->sl_tclass_flowlabel) >> 28);
rdma_ah_set_path_bits(ah_attr, path->g_mylmc & 0x7f);
rdma_ah_set_static_rate(ah_attr,
mthca_rate_to_ib(dev,
path->static_rate & 0xf,
port_num));
if (path->g_mylmc & (1 << 7)) {
u32 tc_fl = be32_to_cpu(path->sl_tclass_flowlabel);
rdma_ah_set_grh(ah_attr, NULL,
tc_fl & 0xfffff,
path->mgid_index &
(dev->limits.gid_table_len - 1),
path->hop_limit,
(tc_fl >> 20) & 0xff);
rdma_ah_set_dgid_raw(ah_attr, path->rgid);
}
}
int mthca_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 mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
int err = 0;
struct mthca_mailbox *mailbox = NULL;
struct mthca_qp_param *qp_param;
struct mthca_qp_context *context;
int mthca_state;
mutex_lock(&qp->mutex);
if (qp->state == IB_QPS_RESET) {
qp_attr->qp_state = IB_QPS_RESET;
goto done;
}
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox)) {
err = PTR_ERR(mailbox);
goto out;
}
err = mthca_QUERY_QP(dev, qp->qpn, 0, mailbox);
if (err) {
mthca_warn(dev, "QUERY_QP failed (%d)\n", err);
goto out_mailbox;
}
qp_param = mailbox->buf;
context = &qp_param->context;
mthca_state = be32_to_cpu(context->flags) >> 28;
qp->state = to_ib_qp_state(mthca_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->transport == RC || qp->transport == UC) {
to_rdma_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path);
to_rdma_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path);
qp_attr->alt_pkey_index =
be32_to_cpu(context->alt_path.port_pkey) & 0x7f;
qp_attr->alt_port_num =
rdma_ah_get_port_num(&qp_attr->alt_ah_attr);
}
qp_attr->pkey_index = be32_to_cpu(context->pri_path.port_pkey) & 0x7f;
qp_attr->port_num =
(be32_to_cpu(context->pri_path.port_pkey) >> 24) & 0x3;
/* qp_attr->en_sqd_async_notify is only applicable in modify qp */
qp_attr->sq_draining = mthca_state == MTHCA_QP_STATE_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 = context->pri_path.rnr_retry >> 5;
qp_attr->alt_timeout = context->alt_path.ackto >> 3;
done:
qp_attr->cur_qp_state = qp_attr->qp_state;
qp_attr->cap.max_send_wr = qp->sq.max;
qp_attr->cap.max_recv_wr = qp->rq.max;
qp_attr->cap.max_send_sge = qp->sq.max_gs;
qp_attr->cap.max_recv_sge = qp->rq.max_gs;
qp_attr->cap.max_inline_data = qp->max_inline_data;
qp_init_attr->cap = qp_attr->cap;
qp_init_attr->sq_sig_type = qp->sq_policy;
out_mailbox:
mthca_free_mailbox(dev, mailbox);
out:
mutex_unlock(&qp->mutex);
return err;
}
static int mthca_path_set(struct mthca_dev *dev, const struct rdma_ah_attr *ah,
struct mthca_qp_path *path, u8 port)
{
path->g_mylmc = rdma_ah_get_path_bits(ah) & 0x7f;
path->rlid = cpu_to_be16(rdma_ah_get_dlid(ah));
path->static_rate = mthca_get_rate(dev, rdma_ah_get_static_rate(ah),
port);
if (rdma_ah_get_ah_flags(ah) & IB_AH_GRH) {
const struct ib_global_route *grh = rdma_ah_read_grh(ah);
if (grh->sgid_index >= dev->limits.gid_table_len) {
mthca_dbg(dev, "sgid_index (%u) too large. max is %d\n",
grh->sgid_index,
dev->limits.gid_table_len - 1);
return -1;
}
path->g_mylmc |= 1 << 7;
path->mgid_index = grh->sgid_index;
path->hop_limit = grh->hop_limit;
path->sl_tclass_flowlabel =
cpu_to_be32((rdma_ah_get_sl(ah) << 28) |
(grh->traffic_class << 20) |
(grh->flow_label));
memcpy(path->rgid, grh->dgid.raw, 16);
} else {
path->sl_tclass_flowlabel = cpu_to_be32(rdma_ah_get_sl(ah) <<
28);
}
return 0;
}
static int __mthca_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 mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
struct mthca_mailbox *mailbox;
struct mthca_qp_param *qp_param;
struct mthca_qp_context *qp_context;
u32 sqd_event = 0;
int err = -EINVAL;
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox)) {
err = PTR_ERR(mailbox);
goto out;
}
qp_param = mailbox->buf;
qp_context = &qp_param->context;
memset(qp_param, 0, sizeof *qp_param);
qp_context->flags = cpu_to_be32((to_mthca_state(new_state) << 28) |
(to_mthca_st(qp->transport) << 16));
qp_context->flags |= cpu_to_be32(MTHCA_QP_BIT_DE);
if (!(attr_mask & IB_QP_PATH_MIG_STATE))
qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11);
else {
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PM_STATE);
switch (attr->path_mig_state) {
case IB_MIG_MIGRATED:
qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11);
break;
case IB_MIG_REARM:
qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_REARM << 11);
break;
case IB_MIG_ARMED:
qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_ARMED << 11);
break;
}
}
/* leave tavor_sched_queue as 0 */
if (qp->transport == MLX || qp->transport == UD)
qp_context->mtu_msgmax = (IB_MTU_2048 << 5) | 11;
else if (attr_mask & IB_QP_PATH_MTU) {
if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_2048) {
mthca_dbg(dev, "path MTU (%u) is invalid\n",
attr->path_mtu);
goto out_mailbox;
}
qp_context->mtu_msgmax = (attr->path_mtu << 5) | 31;
}
if (mthca_is_memfree(dev)) {
if (qp->rq.max)
qp_context->rq_size_stride = ilog2(qp->rq.max) << 3;
qp_context->rq_size_stride |= qp->rq.wqe_shift - 4;
if (qp->sq.max)
qp_context->sq_size_stride = ilog2(qp->sq.max) << 3;
qp_context->sq_size_stride |= qp->sq.wqe_shift - 4;
}
/* leave arbel_sched_queue as 0 */
if (qp->ibqp.uobject)
qp_context->usr_page =
cpu_to_be32(to_mucontext(qp->ibqp.uobject->context)->uar.index);
else
qp_context->usr_page = cpu_to_be32(dev->driver_uar.index);
qp_context->local_qpn = cpu_to_be32(qp->qpn);
if (attr_mask & IB_QP_DEST_QPN) {
qp_context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
}
if (qp->transport == MLX)
qp_context->pri_path.port_pkey |=
cpu_to_be32(qp->port << 24);
else {
if (attr_mask & IB_QP_PORT) {
qp_context->pri_path.port_pkey |=
cpu_to_be32(attr->port_num << 24);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PORT_NUM);
}
}
if (attr_mask & IB_QP_PKEY_INDEX) {
qp_context->pri_path.port_pkey |=
cpu_to_be32(attr->pkey_index);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PKEY_INDEX);
}
if (attr_mask & IB_QP_RNR_RETRY) {
qp_context->alt_path.rnr_retry = qp_context->pri_path.rnr_retry =
attr->rnr_retry << 5;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY |
MTHCA_QP_OPTPAR_ALT_RNR_RETRY);
}
if (attr_mask & IB_QP_AV) {
if (mthca_path_set(dev, &attr->ah_attr, &qp_context->pri_path,
attr_mask & IB_QP_PORT ? attr->port_num : qp->port))
goto out_mailbox;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH);
}
if (ibqp->qp_type == IB_QPT_RC &&
cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
u8 sched_queue = ibqp->uobject ? 0x2 : 0x1;
if (mthca_is_memfree(dev))
qp_context->rlkey_arbel_sched_queue |= sched_queue;
else
qp_context->tavor_sched_queue |= cpu_to_be32(sched_queue);
qp_param->opt_param_mask |=
cpu_to_be32(MTHCA_QP_OPTPAR_SCHED_QUEUE);
}
if (attr_mask & IB_QP_TIMEOUT) {
qp_context->pri_path.ackto = attr->timeout << 3;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ACK_TIMEOUT);
}
if (attr_mask & IB_QP_ALT_PATH) {
if (attr->alt_pkey_index >= dev->limits.pkey_table_len) {
mthca_dbg(dev, "Alternate P_Key index (%u) too large. max is %d\n",
attr->alt_pkey_index, dev->limits.pkey_table_len-1);
goto out_mailbox;
}
if (attr->alt_port_num == 0 || attr->alt_port_num > dev->limits.num_ports) {
mthca_dbg(dev, "Alternate port number (%u) is invalid\n",
attr->alt_port_num);
goto out_mailbox;
}
if (mthca_path_set(dev, &attr->alt_ah_attr, &qp_context->alt_path,
rdma_ah_get_port_num(&attr->alt_ah_attr)))
goto out_mailbox;
qp_context->alt_path.port_pkey |= cpu_to_be32(attr->alt_pkey_index |
attr->alt_port_num << 24);
qp_context->alt_path.ackto = attr->alt_timeout << 3;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ALT_ADDR_PATH);
}
/* leave rdd as 0 */
qp_context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pd_num);
/* leave wqe_base as 0 (we always create an MR based at 0 for WQs) */
qp_context->wqe_lkey = cpu_to_be32(qp->mr.ibmr.lkey);
qp_context->params1 = cpu_to_be32((MTHCA_ACK_REQ_FREQ << 28) |
(MTHCA_FLIGHT_LIMIT << 24) |
MTHCA_QP_BIT_SWE);
if (qp->sq_policy == IB_SIGNAL_ALL_WR)
qp_context->params1 |= cpu_to_be32(MTHCA_QP_BIT_SSC);
if (attr_mask & IB_QP_RETRY_CNT) {
qp_context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RETRY_COUNT);
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
if (attr->max_rd_atomic) {
qp_context->params1 |=
cpu_to_be32(MTHCA_QP_BIT_SRE |
MTHCA_QP_BIT_SAE);
qp_context->params1 |=
cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
}
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_SRA_MAX);
}
if (attr_mask & IB_QP_SQ_PSN)
qp_context->next_send_psn = cpu_to_be32(attr->sq_psn);
qp_context->cqn_snd = cpu_to_be32(to_mcq(ibqp->send_cq)->cqn);
if (mthca_is_memfree(dev)) {
qp_context->snd_wqe_base_l = cpu_to_be32(qp->send_wqe_offset);
qp_context->snd_db_index = cpu_to_be32(qp->sq.db_index);
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
if (attr->max_dest_rd_atomic)
qp_context->params2 |=
cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRA_MAX);
}
if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
qp_context->params2 |= get_hw_access_flags(qp, attr, attr_mask);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE |
MTHCA_QP_OPTPAR_RRE |
MTHCA_QP_OPTPAR_RAE);
}
qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC);
if (ibqp->srq)
qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RIC);
if (attr_mask & IB_QP_MIN_RNR_TIMER) {
qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_TIMEOUT);
}
if (attr_mask & IB_QP_RQ_PSN)
qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
qp_context->ra_buff_indx =
cpu_to_be32(dev->qp_table.rdb_base +
((qp->qpn & (dev->limits.num_qps - 1)) * MTHCA_RDB_ENTRY_SIZE <<
dev->qp_table.rdb_shift));
qp_context->cqn_rcv = cpu_to_be32(to_mcq(ibqp->recv_cq)->cqn);
if (mthca_is_memfree(dev))
qp_context->rcv_db_index = cpu_to_be32(qp->rq.db_index);
if (attr_mask & IB_QP_QKEY) {
qp_context->qkey = cpu_to_be32(attr->qkey);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_Q_KEY);
}
if (ibqp->srq)
qp_context->srqn = cpu_to_be32(1 << 24 |
to_msrq(ibqp->srq)->srqn);
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 << 31;
err = mthca_MODIFY_QP(dev, cur_state, new_state, qp->qpn, 0,
mailbox, sqd_event);
if (err) {
mthca_warn(dev, "modify QP %d->%d returned %d.\n",
cur_state, new_state, err);
goto out_mailbox;
}
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;
if (attr_mask & IB_QP_ALT_PATH)
qp->alt_port = attr->alt_port_num;
if (is_sqp(dev, qp))
store_attrs(to_msqp(qp), attr, attr_mask);
/*
* 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)
init_port(dev, qp->port);
if (cur_state != IB_QPS_RESET &&
cur_state != IB_QPS_ERR &&
(new_state == IB_QPS_RESET ||
new_state == IB_QPS_ERR))
mthca_CLOSE_IB(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 && !qp->ibqp.uobject) {
mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq), qp->qpn,
qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq), qp->qpn, NULL);
mthca_wq_reset(&qp->sq);
qp->sq.last = get_send_wqe(qp, qp->sq.max - 1);
mthca_wq_reset(&qp->rq);
qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1);
if (mthca_is_memfree(dev)) {
*qp->sq.db = 0;
*qp->rq.db = 0;
}
}
out_mailbox:
mthca_free_mailbox(dev, mailbox);
out:
return err;
}
int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
struct ib_udata *udata)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
enum ib_qp_state cur_state, new_state;
int err = -EINVAL;
mutex_lock(&qp->mutex);
if (attr_mask & IB_QP_CUR_STATE) {
cur_state = attr->cur_qp_state;
} else {
spin_lock_irq(&qp->sq.lock);
spin_lock(&qp->rq.lock);
cur_state = qp->state;
spin_unlock(&qp->rq.lock);
spin_unlock_irq(&qp->sq.lock);
}
new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask,
IB_LINK_LAYER_UNSPECIFIED)) {
mthca_dbg(dev, "Bad QP transition (transport %d) "
"%d->%d with attr 0x%08x\n",
qp->transport, cur_state, new_state,
attr_mask);
goto out;
}
if ((attr_mask & IB_QP_PKEY_INDEX) &&
attr->pkey_index >= dev->limits.pkey_table_len) {
mthca_dbg(dev, "P_Key index (%u) too large. max is %d\n",
attr->pkey_index, dev->limits.pkey_table_len-1);
goto out;
}
if ((attr_mask & IB_QP_PORT) &&
(attr->port_num == 0 || attr->port_num > dev->limits.num_ports)) {
mthca_dbg(dev, "Port number (%u) is invalid\n", attr->port_num);
goto out;
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
attr->max_rd_atomic > dev->limits.max_qp_init_rdma) {
mthca_dbg(dev, "Max rdma_atomic as initiator %u too large (max is %d)\n",
attr->max_rd_atomic, dev->limits.max_qp_init_rdma);
goto out;
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
attr->max_dest_rd_atomic > 1 << dev->qp_table.rdb_shift) {
mthca_dbg(dev, "Max rdma_atomic as responder %u too large (max %d)\n",
attr->max_dest_rd_atomic, 1 << dev->qp_table.rdb_shift);
goto out;
}
if (cur_state == new_state && cur_state == IB_QPS_RESET) {
err = 0;
goto out;
}
err = __mthca_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
out:
mutex_unlock(&qp->mutex);
return err;
}
static int mthca_max_data_size(struct mthca_dev *dev, struct mthca_qp *qp, int desc_sz)
{
/*
* Calculate the maximum size of WQE s/g segments, excluding
* the next segment and other non-data segments.
*/
int max_data_size = desc_sz - sizeof (struct mthca_next_seg);
switch (qp->transport) {
case MLX:
max_data_size -= 2 * sizeof (struct mthca_data_seg);
break;
case UD:
if (mthca_is_memfree(dev))
max_data_size -= sizeof (struct mthca_arbel_ud_seg);
else
max_data_size -= sizeof (struct mthca_tavor_ud_seg);
break;
default:
max_data_size -= sizeof (struct mthca_raddr_seg);
break;
}
return max_data_size;
}
static inline int mthca_max_inline_data(struct mthca_pd *pd, int max_data_size)
{
/* We don't support inline data for kernel QPs (yet). */
return pd->ibpd.uobject ? max_data_size - MTHCA_INLINE_HEADER_SIZE : 0;
}
static void mthca_adjust_qp_caps(struct mthca_dev *dev,
struct mthca_pd *pd,
struct mthca_qp *qp)
{
int max_data_size = mthca_max_data_size(dev, qp,
min(dev->limits.max_desc_sz,
1 << qp->sq.wqe_shift));
qp->max_inline_data = mthca_max_inline_data(pd, max_data_size);
qp->sq.max_gs = min_t(int, dev->limits.max_sg,
max_data_size / sizeof (struct mthca_data_seg));
qp->rq.max_gs = min_t(int, dev->limits.max_sg,
(min(dev->limits.max_desc_sz, 1 << qp->rq.wqe_shift) -
sizeof (struct mthca_next_seg)) /
sizeof (struct mthca_data_seg));
}
/*
* Allocate and register buffer for WQEs. qp->rq.max, sq.max,
* rq.max_gs and sq.max_gs must all be assigned.
* mthca_alloc_wqe_buf will calculate rq.wqe_shift and
* sq.wqe_shift (as well as send_wqe_offset, is_direct, and
* queue)
*/
static int mthca_alloc_wqe_buf(struct mthca_dev *dev,
struct mthca_pd *pd,
struct mthca_qp *qp)
{
int size;
int err = -ENOMEM;
size = sizeof (struct mthca_next_seg) +
qp->rq.max_gs * sizeof (struct mthca_data_seg);
if (size > dev->limits.max_desc_sz)
return -EINVAL;
for (qp->rq.wqe_shift = 6; 1 << qp->rq.wqe_shift < size;
qp->rq.wqe_shift++)
; /* nothing */
size = qp->sq.max_gs * sizeof (struct mthca_data_seg);
switch (qp->transport) {
case MLX:
size += 2 * sizeof (struct mthca_data_seg);
break;
case UD:
size += mthca_is_memfree(dev) ?
sizeof (struct mthca_arbel_ud_seg) :
sizeof (struct mthca_tavor_ud_seg);
break;
case UC:
size += sizeof (struct mthca_raddr_seg);
break;
case RC:
size += sizeof (struct mthca_raddr_seg);
/*
* An atomic op will require an atomic segment, a
* remote address segment and one scatter entry.
*/
size = max_t(int, size,
sizeof (struct mthca_atomic_seg) +
sizeof (struct mthca_raddr_seg) +
sizeof (struct mthca_data_seg));
break;
default:
break;
}
/* Make sure that we have enough space for a bind request */
size = max_t(int, size, sizeof (struct mthca_bind_seg));
size += sizeof (struct mthca_next_seg);
if (size > dev->limits.max_desc_sz)
return -EINVAL;
for (qp->sq.wqe_shift = 6; 1 << qp->sq.wqe_shift < size;
qp->sq.wqe_shift++)
; /* nothing */
qp->send_wqe_offset = ALIGN(qp->rq.max << qp->rq.wqe_shift,
1 << qp->sq.wqe_shift);
/*
* If this is a userspace QP, we don't actually have to
* allocate anything. All we need is to calculate the WQE
* sizes and the send_wqe_offset, so we're done now.
*/
if (pd->ibpd.uobject)
return 0;
size = PAGE_ALIGN(qp->send_wqe_offset +
(qp->sq.max << qp->sq.wqe_shift));
qp->wrid = kmalloc_array(qp->rq.max + qp->sq.max, sizeof(u64),
GFP_KERNEL);
if (!qp->wrid)
goto err_out;
err = mthca_buf_alloc(dev, size, MTHCA_MAX_DIRECT_QP_SIZE,
&qp->queue, &qp->is_direct, pd, 0, &qp->mr);
if (err)
goto err_out;
return 0;
err_out:
kfree(qp->wrid);
return err;
}
static void mthca_free_wqe_buf(struct mthca_dev *dev,
struct mthca_qp *qp)
{
mthca_buf_free(dev, PAGE_ALIGN(qp->send_wqe_offset +
(qp->sq.max << qp->sq.wqe_shift)),
&qp->queue, qp->is_direct, &qp->mr);
kfree(qp->wrid);
}
static int mthca_map_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
int ret;
if (mthca_is_memfree(dev)) {
ret = mthca_table_get(dev, dev->qp_table.qp_table, qp->qpn);
if (ret)
return ret;
ret = mthca_table_get(dev, dev->qp_table.eqp_table, qp->qpn);
if (ret)
goto err_qpc;
ret = mthca_table_get(dev, dev->qp_table.rdb_table,
qp->qpn << dev->qp_table.rdb_shift);
if (ret)
goto err_eqpc;
}
return 0;
err_eqpc:
mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
err_qpc:
mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
return ret;
}
static void mthca_unmap_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
mthca_table_put(dev, dev->qp_table.rdb_table,
qp->qpn << dev->qp_table.rdb_shift);
mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn);
mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn);
}
static int mthca_alloc_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
if (mthca_is_memfree(dev)) {
qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ,
qp->qpn, &qp->rq.db);
if (qp->rq.db_index < 0)
return -ENOMEM;
qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ,
qp->qpn, &qp->sq.db);
if (qp->sq.db_index < 0) {
mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
return -ENOMEM;
}
}
return 0;
}
static void mthca_free_memfree(struct mthca_dev *dev,
struct mthca_qp *qp)
{
if (mthca_is_memfree(dev)) {
mthca_free_db(dev, MTHCA_DB_TYPE_SQ, qp->sq.db_index);
mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index);
}
}
static int mthca_alloc_qp_common(struct mthca_dev *dev,
struct mthca_pd *pd,
struct mthca_cq *send_cq,
struct mthca_cq *recv_cq,
enum ib_sig_type send_policy,
struct mthca_qp *qp)
{
int ret;
int i;
struct mthca_next_seg *next;
qp->refcount = 1;
init_waitqueue_head(&qp->wait);
mutex_init(&qp->mutex);
qp->state = IB_QPS_RESET;
qp->atomic_rd_en = 0;
qp->resp_depth = 0;
qp->sq_policy = send_policy;
mthca_wq_reset(&qp->sq);
mthca_wq_reset(&qp->rq);
spin_lock_init(&qp->sq.lock);
spin_lock_init(&qp->rq.lock);
ret = mthca_map_memfree(dev, qp);
if (ret)
return ret;
ret = mthca_alloc_wqe_buf(dev, pd, qp);
if (ret) {
mthca_unmap_memfree(dev, qp);
return ret;
}
mthca_adjust_qp_caps(dev, pd, qp);
/*
* If this is a userspace QP, we're done now. The doorbells
* will be allocated and buffers will be initialized in
* userspace.
*/
if (pd->ibpd.uobject)
return 0;
ret = mthca_alloc_memfree(dev, qp);
if (ret) {
mthca_free_wqe_buf(dev, qp);
mthca_unmap_memfree(dev, qp);
return ret;
}
if (mthca_is_memfree(dev)) {
struct mthca_data_seg *scatter;
int size = (sizeof (struct mthca_next_seg) +
qp->rq.max_gs * sizeof (struct mthca_data_seg)) / 16;
for (i = 0; i < qp->rq.max; ++i) {
next = get_recv_wqe(qp, i);
next->nda_op = cpu_to_be32(((i + 1) & (qp->rq.max - 1)) <<
qp->rq.wqe_shift);
next->ee_nds = cpu_to_be32(size);
for (scatter = (void *) (next + 1);
(void *) scatter < (void *) next + (1 << qp->rq.wqe_shift);
++scatter)
scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
}
for (i = 0; i < qp->sq.max; ++i) {
next = get_send_wqe(qp, i);
next->nda_op = cpu_to_be32((((i + 1) & (qp->sq.max - 1)) <<
qp->sq.wqe_shift) +
qp->send_wqe_offset);
}
} else {
for (i = 0; i < qp->rq.max; ++i) {
next = get_recv_wqe(qp, i);
next->nda_op = htonl((((i + 1) % qp->rq.max) <<
qp->rq.wqe_shift) | 1);
}
}
qp->sq.last = get_send_wqe(qp, qp->sq.max - 1);
qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1);
return 0;
}
static int mthca_set_qp_size(struct mthca_dev *dev, struct ib_qp_cap *cap,
struct mthca_pd *pd, struct mthca_qp *qp)
{
int max_data_size = mthca_max_data_size(dev, qp, dev->limits.max_desc_sz);
/* Sanity check QP size before proceeding */
if (cap->max_send_wr > dev->limits.max_wqes ||
cap->max_recv_wr > dev->limits.max_wqes ||
cap->max_send_sge > dev->limits.max_sg ||
cap->max_recv_sge > dev->limits.max_sg ||
cap->max_inline_data > mthca_max_inline_data(pd, max_data_size))
return -EINVAL;
/*
* For MLX transport we need 2 extra send gather entries:
* one for the header and one for the checksum at the end
*/
if (qp->transport == MLX && cap->max_send_sge + 2 > dev->limits.max_sg)
return -EINVAL;
if (mthca_is_memfree(dev)) {
qp->rq.max = cap->max_recv_wr ?
roundup_pow_of_two(cap->max_recv_wr) : 0;
qp->sq.max = cap->max_send_wr ?
roundup_pow_of_two(cap->max_send_wr) : 0;
} else {
qp->rq.max = cap->max_recv_wr;
qp->sq.max = cap->max_send_wr;
}
qp->rq.max_gs = cap->max_recv_sge;
qp->sq.max_gs = max_t(int, cap->max_send_sge,
ALIGN(cap->max_inline_data + MTHCA_INLINE_HEADER_SIZE,
MTHCA_INLINE_CHUNK_SIZE) /
sizeof (struct mthca_data_seg));
return 0;
}
int mthca_alloc_qp(struct mthca_dev *dev,
struct mthca_pd *pd,
struct mthca_cq *send_cq,
struct mthca_cq *recv_cq,
enum ib_qp_type type,
enum ib_sig_type send_policy,
struct ib_qp_cap *cap,
struct mthca_qp *qp)
{
int err;
switch (type) {
case IB_QPT_RC: qp->transport = RC; break;
case IB_QPT_UC: qp->transport = UC; break;
case IB_QPT_UD: qp->transport = UD; break;
default: return -EINVAL;
}
err = mthca_set_qp_size(dev, cap, pd, qp);
if (err)
return err;
qp->qpn = mthca_alloc(&dev->qp_table.alloc);
if (qp->qpn == -1)
return -ENOMEM;
/* initialize port to zero for error-catching. */
qp->port = 0;
err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
send_policy, qp);
if (err) {
mthca_free(&dev->qp_table.alloc, qp->qpn);
return err;
}
spin_lock_irq(&dev->qp_table.lock);
mthca_array_set(&dev->qp_table.qp,
qp->qpn & (dev->limits.num_qps - 1), qp);
spin_unlock_irq(&dev->qp_table.lock);
return 0;
}
static void mthca_lock_cqs(struct mthca_cq *send_cq, struct mthca_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->cqn < recv_cq->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 mthca_unlock_cqs(struct mthca_cq *send_cq, struct mthca_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->cqn < recv_cq->cqn) {
spin_unlock(&recv_cq->lock);
spin_unlock_irq(&send_cq->lock);
} else {
spin_unlock(&send_cq->lock);
spin_unlock_irq(&recv_cq->lock);
}
}
int mthca_alloc_sqp(struct mthca_dev *dev,
struct mthca_pd *pd,
struct mthca_cq *send_cq,
struct mthca_cq *recv_cq,
enum ib_sig_type send_policy,
struct ib_qp_cap *cap,
int qpn,
int port,
struct mthca_sqp *sqp)
{
u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1;
int err;
sqp->qp.transport = MLX;
err = mthca_set_qp_size(dev, cap, pd, &sqp->qp);
if (err)
return err;
sqp->header_buf_size = sqp->qp.sq.max * MTHCA_UD_HEADER_SIZE;
sqp->header_buf = dma_alloc_coherent(&dev->pdev->dev, sqp->header_buf_size,
&sqp->header_dma, GFP_KERNEL);
if (!sqp->header_buf)
return -ENOMEM;
spin_lock_irq(&dev->qp_table.lock);
if (mthca_array_get(&dev->qp_table.qp, mqpn))
err = -EBUSY;
else
mthca_array_set(&dev->qp_table.qp, mqpn, sqp);
spin_unlock_irq(&dev->qp_table.lock);
if (err)
goto err_out;
sqp->qp.port = port;
sqp->qp.qpn = mqpn;
sqp->qp.transport = MLX;
err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
send_policy, &sqp->qp);
if (err)
goto err_out_free;
atomic_inc(&pd->sqp_count);
return 0;
err_out_free:
/*
* Lock CQs here, so that CQ polling code can do QP lookup
* without taking a lock.
*/
mthca_lock_cqs(send_cq, recv_cq);
spin_lock(&dev->qp_table.lock);
mthca_array_clear(&dev->qp_table.qp, mqpn);
spin_unlock(&dev->qp_table.lock);
mthca_unlock_cqs(send_cq, recv_cq);
err_out:
dma_free_coherent(&dev->pdev->dev, sqp->header_buf_size,
sqp->header_buf, sqp->header_dma);
return err;
}
static inline int get_qp_refcount(struct mthca_dev *dev, struct mthca_qp *qp)
{
int c;
spin_lock_irq(&dev->qp_table.lock);
c = qp->refcount;
spin_unlock_irq(&dev->qp_table.lock);
return c;
}
void mthca_free_qp(struct mthca_dev *dev,
struct mthca_qp *qp)
{
struct mthca_cq *send_cq;
struct mthca_cq *recv_cq;
send_cq = to_mcq(qp->ibqp.send_cq);
recv_cq = to_mcq(qp->ibqp.recv_cq);
/*
* Lock CQs here, so that CQ polling code can do QP lookup
* without taking a lock.
*/
mthca_lock_cqs(send_cq, recv_cq);
spin_lock(&dev->qp_table.lock);
mthca_array_clear(&dev->qp_table.qp,
qp->qpn & (dev->limits.num_qps - 1));
--qp->refcount;
spin_unlock(&dev->qp_table.lock);
mthca_unlock_cqs(send_cq, recv_cq);
wait_event(qp->wait, !get_qp_refcount(dev, qp));
if (qp->state != IB_QPS_RESET)
mthca_MODIFY_QP(dev, qp->state, IB_QPS_RESET, qp->qpn, 0,
NULL, 0);
/*
* If this is a userspace QP, the buffers, MR, CQs and so on
* will be cleaned up in userspace, so all we have to do is
* unref the mem-free tables and free the QPN in our table.
*/
if (!qp->ibqp.uobject) {
mthca_cq_clean(dev, recv_cq, qp->qpn,
qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
if (send_cq != recv_cq)
mthca_cq_clean(dev, send_cq, qp->qpn, NULL);
mthca_free_memfree(dev, qp);
mthca_free_wqe_buf(dev, qp);
}
mthca_unmap_memfree(dev, qp);
if (is_sqp(dev, qp)) {
atomic_dec(&(to_mpd(qp->ibqp.pd)->sqp_count));
dma_free_coherent(&dev->pdev->dev,
to_msqp(qp)->header_buf_size,
to_msqp(qp)->header_buf,
to_msqp(qp)->header_dma);
} else
mthca_free(&dev->qp_table.alloc, qp->qpn);
}
/* Create UD header for an MLX send and build a data segment for it */
static int build_mlx_header(struct mthca_dev *dev, struct mthca_sqp *sqp,
int ind, const struct ib_ud_wr *wr,
struct mthca_mlx_seg *mlx,
struct mthca_data_seg *data)
{
int header_size;
int err;
u16 pkey;
ib_ud_header_init(256, /* assume a MAD */ 1, 0, 0,
mthca_ah_grh_present(to_mah(wr->ah)), 0, 0, 0,
&sqp->ud_header);
err = mthca_read_ah(dev, to_mah(wr->ah), &sqp->ud_header);
if (err)
return err;
mlx->flags &= ~cpu_to_be32(MTHCA_NEXT_SOLICIT | 1);
mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MTHCA_MLX_VL15 : 0) |
(sqp->ud_header.lrh.destination_lid ==
IB_LID_PERMISSIVE ? MTHCA_MLX_SLR : 0) |
(sqp->ud_header.lrh.service_level << 8));
mlx->rlid = sqp->ud_header.lrh.destination_lid;
mlx->vcrc = 0;
switch (wr->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->wr.ex.imm_data;
break;
default:
return -EINVAL;
}
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->wr.send_flags & IB_SEND_SOLICITED);
if (!sqp->qp.ibqp.qp_num)
ib_get_cached_pkey(&dev->ib_dev, sqp->qp.port,
sqp->pkey_index, &pkey);
else
ib_get_cached_pkey(&dev->ib_dev, sqp->qp.port,
wr->pkey_index, &pkey);
sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->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->remote_qkey & 0x80000000 ?
sqp->qkey : wr->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 +
ind * MTHCA_UD_HEADER_SIZE);
data->byte_count = cpu_to_be32(header_size);
data->lkey = cpu_to_be32(to_mpd(sqp->qp.ibqp.pd)->ntmr.ibmr.lkey);
data->addr = cpu_to_be64(sqp->header_dma +
ind * MTHCA_UD_HEADER_SIZE);
return 0;
}
static inline int mthca_wq_overflow(struct mthca_wq *wq, int nreq,
struct ib_cq *ib_cq)
{
unsigned cur;
struct mthca_cq *cq;
cur = wq->head - wq->tail;
if (likely(cur + nreq < wq->max))
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;
}
static __always_inline void set_raddr_seg(struct mthca_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 __always_inline void set_atomic_seg(struct mthca_atomic_seg *aseg,
const struct ib_atomic_wr *wr)
{
if (wr->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
aseg->swap_add = cpu_to_be64(wr->swap);
aseg->compare = cpu_to_be64(wr->compare_add);
} else {
aseg->swap_add = cpu_to_be64(wr->compare_add);
aseg->compare = 0;
}
}
static void set_tavor_ud_seg(struct mthca_tavor_ud_seg *useg,
const struct ib_ud_wr *wr)
{
useg->lkey = cpu_to_be32(to_mah(wr->ah)->key);
useg->av_addr = cpu_to_be64(to_mah(wr->ah)->avdma);
useg->dqpn = cpu_to_be32(wr->remote_qpn);
useg->qkey = cpu_to_be32(wr->remote_qkey);
}
static void set_arbel_ud_seg(struct mthca_arbel_ud_seg *useg,
const struct ib_ud_wr *wr)
{
memcpy(useg->av, to_mah(wr->ah)->av, MTHCA_AV_SIZE);
useg->dqpn = cpu_to_be32(wr->remote_qpn);
useg->qkey = cpu_to_be32(wr->remote_qkey);
}
int mthca_tavor_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
const struct ib_send_wr **bad_wr)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
void *wqe;
void *prev_wqe;
unsigned long flags;
int err = 0;
int nreq;
int i;
int size;
/*
* f0 and size0 are only used if nreq != 0, and they will
* always be initialized the first time through the main loop
* before nreq is incremented. So nreq cannot become non-zero
* without initializing f0 and size0, and they are in fact
* never used uninitialized.
*/
int uninitialized_var(size0);
u32 uninitialized_var(f0);
int ind;
u8 op0 = 0;
spin_lock_irqsave(&qp->sq.lock, flags);
/* XXX check that state is OK to post send */
ind = qp->sq.next_ind;
for (nreq = 0; wr; ++nreq, wr = wr->next) {
if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
mthca_err(dev, "SQ %06x full (%u head, %u tail,"
" %d max, %d nreq)\n", qp->qpn,
qp->sq.head, qp->sq.tail,
qp->sq.max, nreq);
err = -ENOMEM;
*bad_wr = wr;
goto out;
}
wqe = get_send_wqe(qp, ind);
prev_wqe = qp->sq.last;
qp->sq.last = wqe;
((struct mthca_next_seg *) wqe)->nda_op = 0;
((struct mthca_next_seg *) wqe)->ee_nds = 0;
((struct mthca_next_seg *) wqe)->flags =
((wr->send_flags & IB_SEND_SIGNALED) ?
cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) |
((wr->send_flags & IB_SEND_SOLICITED) ?
cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) |
cpu_to_be32(1);
if (wr->opcode == IB_WR_SEND_WITH_IMM ||
wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
((struct mthca_next_seg *) wqe)->imm = wr->ex.imm_data;
wqe += sizeof (struct mthca_next_seg);
size = sizeof (struct mthca_next_seg) / 16;
switch (qp->transport) {
case RC:
switch (wr->opcode) {
case IB_WR_ATOMIC_CMP_AND_SWP:
case IB_WR_ATOMIC_FETCH_AND_ADD:
set_raddr_seg(wqe, atomic_wr(wr)->remote_addr,
atomic_wr(wr)->rkey);
wqe += sizeof (struct mthca_raddr_seg);
set_atomic_seg(wqe, atomic_wr(wr));
wqe += sizeof (struct mthca_atomic_seg);
size += (sizeof (struct mthca_raddr_seg) +
sizeof (struct mthca_atomic_seg)) / 16;
break;
case IB_WR_RDMA_WRITE:
case IB_WR_RDMA_WRITE_WITH_IMM:
case IB_WR_RDMA_READ:
set_raddr_seg(wqe, rdma_wr(wr)->remote_addr,
rdma_wr(wr)->rkey);
wqe += sizeof (struct mthca_raddr_seg);
size += sizeof (struct mthca_raddr_seg) / 16;
break;
default:
/* No extra segments required for sends */
break;
}
break;
case UC:
switch (wr->opcode) {
case IB_WR_RDMA_WRITE:
case IB_WR_RDMA_WRITE_WITH_IMM:
set_raddr_seg(wqe, rdma_wr(wr)->remote_addr,
rdma_wr(wr)->rkey);
wqe += sizeof (struct mthca_raddr_seg);
size += sizeof (struct mthca_raddr_seg) / 16;
break;
default:
/* No extra segments required for sends */
break;
}
break;
case UD:
set_tavor_ud_seg(wqe, ud_wr(wr));
wqe += sizeof (struct mthca_tavor_ud_seg);
size += sizeof (struct mthca_tavor_ud_seg) / 16;
break;
case MLX:
err = build_mlx_header(dev, to_msqp(qp), ind, ud_wr(wr),
wqe - sizeof (struct mthca_next_seg),
wqe);
if (err) {
*bad_wr = wr;
goto out;
}
wqe += sizeof (struct mthca_data_seg);
size += sizeof (struct mthca_data_seg) / 16;
break;
}
if (wr->num_sge > qp->sq.max_gs) {
mthca_err(dev, "too many gathers\n");
err = -EINVAL;
*bad_wr = wr;
goto out;
}
for (i = 0; i < wr->num_sge; ++i) {
mthca_set_data_seg(wqe, wr->sg_list + i);
wqe += sizeof (struct mthca_data_seg);
size += sizeof (struct mthca_data_seg) / 16;
}
/* Add one more inline data segment for ICRC */
if (qp->transport == MLX) {
((struct mthca_data_seg *) wqe)->byte_count =
cpu_to_be32((1 << 31) | 4);
((u32 *) wqe)[1] = 0;
wqe += sizeof (struct mthca_data_seg);
size += sizeof (struct mthca_data_seg) / 16;
}
qp->wrid[ind + qp->rq.max] = wr->wr_id;
if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) {
mthca_err(dev, "opcode invalid\n");
err = -EINVAL;
*bad_wr = wr;
goto out;
}
((struct mthca_next_seg *) prev_wqe)->nda_op =
cpu_to_be32(((ind << qp->sq.wqe_shift) +
qp->send_wqe_offset) |
mthca_opcode[wr->opcode]);
wmb();
((struct mthca_next_seg *) prev_wqe)->ee_nds =
cpu_to_be32((nreq ? 0 : MTHCA_NEXT_DBD) | size |
((wr->send_flags & IB_SEND_FENCE) ?
MTHCA_NEXT_FENCE : 0));
if (!nreq) {
size0 = size;
op0 = mthca_opcode[wr->opcode];
f0 = wr->send_flags & IB_SEND_FENCE ?
MTHCA_SEND_DOORBELL_FENCE : 0;
}
++ind;
if (unlikely(ind >= qp->sq.max))
ind -= qp->sq.max;
}
out:
if (likely(nreq)) {
wmb();
mthca_write64(((qp->sq.next_ind << qp->sq.wqe_shift) +
qp->send_wqe_offset) | f0 | op0,
(qp->qpn << 8) | size0,
dev->kar + MTHCA_SEND_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
/*
* Make sure doorbells don't leak out of SQ spinlock
* and reach the HCA out of order:
*/
mmiowb();
}
qp->sq.next_ind = ind;
qp->sq.head += nreq;
spin_unlock_irqrestore(&qp->sq.lock, flags);
return err;
}
int mthca_tavor_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
unsigned long flags;
int err = 0;
int nreq;
int i;
int size;
/*
* size0 is only used if nreq != 0, and it will always be
* initialized the first time through the main loop before
* nreq is incremented. So nreq cannot become non-zero
* without initializing size0, and it is in fact never used
* uninitialized.
*/
int uninitialized_var(size0);
int ind;
void *wqe;
void *prev_wqe;
spin_lock_irqsave(&qp->rq.lock, flags);
/* XXX check that state is OK to post receive */
ind = qp->rq.next_ind;
for (nreq = 0; wr; wr = wr->next) {
if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
mthca_err(dev, "RQ %06x full (%u head, %u tail,"
" %d max, %d nreq)\n", qp->qpn,
qp->rq.head, qp->rq.tail,
qp->rq.max, nreq);
err = -ENOMEM;
*bad_wr = wr;
goto out;
}
wqe = get_recv_wqe(qp, ind);
prev_wqe = qp->rq.last;
qp->rq.last = wqe;
((struct mthca_next_seg *) wqe)->ee_nds =
cpu_to_be32(MTHCA_NEXT_DBD);
((struct mthca_next_seg *) wqe)->flags = 0;
wqe += sizeof (struct mthca_next_seg);
size = sizeof (struct mthca_next_seg) / 16;
if (unlikely(wr->num_sge > qp->rq.max_gs)) {
err = -EINVAL;
*bad_wr = wr;
goto out;
}
for (i = 0; i < wr->num_sge; ++i) {
mthca_set_data_seg(wqe, wr->sg_list + i);
wqe += sizeof (struct mthca_data_seg);
size += sizeof (struct mthca_data_seg) / 16;
}
qp->wrid[ind] = wr->wr_id;
((struct mthca_next_seg *) prev_wqe)->ee_nds =
cpu_to_be32(MTHCA_NEXT_DBD | size);
if (!nreq)
size0 = size;
++ind;
if (unlikely(ind >= qp->rq.max))
ind -= qp->rq.max;
++nreq;
if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) {
nreq = 0;
wmb();
mthca_write64((qp->rq.next_ind << qp->rq.wqe_shift) | size0,
qp->qpn << 8, dev->kar + MTHCA_RECEIVE_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
qp->rq.next_ind = ind;
qp->rq.head += MTHCA_TAVOR_MAX_WQES_PER_RECV_DB;
}
}
out:
if (likely(nreq)) {
wmb();
mthca_write64((qp->rq.next_ind << qp->rq.wqe_shift) | size0,
qp->qpn << 8 | nreq, dev->kar + MTHCA_RECEIVE_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
}
qp->rq.next_ind = ind;
qp->rq.head += nreq;
/*
* Make sure doorbells don't leak out of RQ spinlock and reach
* the HCA out of order:
*/
mmiowb();
spin_unlock_irqrestore(&qp->rq.lock, flags);
return err;
}
int mthca_arbel_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
const struct ib_send_wr **bad_wr)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
u32 dbhi;
void *wqe;
void *prev_wqe;
unsigned long flags;
int err = 0;
int nreq;
int i;
int size;
/*
* f0 and size0 are only used if nreq != 0, and they will
* always be initialized the first time through the main loop
* before nreq is incremented. So nreq cannot become non-zero
* without initializing f0 and size0, and they are in fact
* never used uninitialized.
*/
int uninitialized_var(size0);
u32 uninitialized_var(f0);
int ind;
u8 op0 = 0;
spin_lock_irqsave(&qp->sq.lock, flags);
/* XXX check that state is OK to post send */
ind = qp->sq.head & (qp->sq.max - 1);
for (nreq = 0; wr; ++nreq, wr = wr->next) {
if (unlikely(nreq == MTHCA_ARBEL_MAX_WQES_PER_SEND_DB)) {
nreq = 0;
dbhi = (MTHCA_ARBEL_MAX_WQES_PER_SEND_DB << 24) |
((qp->sq.head & 0xffff) << 8) | f0 | op0;
qp->sq.head += MTHCA_ARBEL_MAX_WQES_PER_SEND_DB;
/*
* Make sure that descriptors are written before
* doorbell record.
*/
wmb();
*qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff);
/*
* Make sure doorbell record is written before we
* write MMIO send doorbell.
*/
wmb();
mthca_write64(dbhi, (qp->qpn << 8) | size0,
dev->kar + MTHCA_SEND_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
}
if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
mthca_err(dev, "SQ %06x full (%u head, %u tail,"
" %d max, %d nreq)\n", qp->qpn,
qp->sq.head, qp->sq.tail,
qp->sq.max, nreq);
err = -ENOMEM;
*bad_wr = wr;
goto out;
}
wqe = get_send_wqe(qp, ind);
prev_wqe = qp->sq.last;
qp->sq.last = wqe;
((struct mthca_next_seg *) wqe)->flags =
((wr->send_flags & IB_SEND_SIGNALED) ?
cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) |
((wr->send_flags & IB_SEND_SOLICITED) ?
cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) |
((wr->send_flags & IB_SEND_IP_CSUM) ?
cpu_to_be32(MTHCA_NEXT_IP_CSUM | MTHCA_NEXT_TCP_UDP_CSUM) : 0) |
cpu_to_be32(1);
if (wr->opcode == IB_WR_SEND_WITH_IMM ||
wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
((struct mthca_next_seg *) wqe)->imm = wr->ex.imm_data;
wqe += sizeof (struct mthca_next_seg);
size = sizeof (struct mthca_next_seg) / 16;
switch (qp->transport) {
case RC:
switch (wr->opcode) {
case IB_WR_ATOMIC_CMP_AND_SWP:
case IB_WR_ATOMIC_FETCH_AND_ADD:
set_raddr_seg(wqe, atomic_wr(wr)->remote_addr,
atomic_wr(wr)->rkey);
wqe += sizeof (struct mthca_raddr_seg);
set_atomic_seg(wqe, atomic_wr(wr));
wqe += sizeof (struct mthca_atomic_seg);
size += (sizeof (struct mthca_raddr_seg) +
sizeof (struct mthca_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, rdma_wr(wr)->remote_addr,
rdma_wr(wr)->rkey);
wqe += sizeof (struct mthca_raddr_seg);
size += sizeof (struct mthca_raddr_seg) / 16;
break;
default:
/* No extra segments required for sends */
break;
}
break;
case UC:
switch (wr->opcode) {
case IB_WR_RDMA_WRITE:
case IB_WR_RDMA_WRITE_WITH_IMM:
set_raddr_seg(wqe, rdma_wr(wr)->remote_addr,
rdma_wr(wr)->rkey);
wqe += sizeof (struct mthca_raddr_seg);
size += sizeof (struct mthca_raddr_seg) / 16;
break;
default:
/* No extra segments required for sends */
break;
}
break;
case UD:
set_arbel_ud_seg(wqe, ud_wr(wr));
wqe += sizeof (struct mthca_arbel_ud_seg);
size += sizeof (struct mthca_arbel_ud_seg) / 16;
break;
case MLX:
err = build_mlx_header(dev, to_msqp(qp), ind, ud_wr(wr),
wqe - sizeof (struct mthca_next_seg),
wqe);
if (err) {
*bad_wr = wr;
goto out;
}
wqe += sizeof (struct mthca_data_seg);
size += sizeof (struct mthca_data_seg) / 16;
break;
}
if (wr->num_sge > qp->sq.max_gs) {
mthca_err(dev, "too many gathers\n");
err = -EINVAL;
*bad_wr = wr;
goto out;
}
for (i = 0; i < wr->num_sge; ++i) {
mthca_set_data_seg(wqe, wr->sg_list + i);
wqe += sizeof (struct mthca_data_seg);
size += sizeof (struct mthca_data_seg) / 16;
}
/* Add one more inline data segment for ICRC */
if (qp->transport == MLX) {
((struct mthca_data_seg *) wqe)->byte_count =
cpu_to_be32((1 << 31) | 4);
((u32 *) wqe)[1] = 0;
wqe += sizeof (struct mthca_data_seg);
size += sizeof (struct mthca_data_seg) / 16;
}
qp->wrid[ind + qp->rq.max] = wr->wr_id;
if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) {
mthca_err(dev, "opcode invalid\n");
err = -EINVAL;
*bad_wr = wr;
goto out;
}
((struct mthca_next_seg *) prev_wqe)->nda_op =
cpu_to_be32(((ind << qp->sq.wqe_shift) +
qp->send_wqe_offset) |
mthca_opcode[wr->opcode]);
wmb();
((struct mthca_next_seg *) prev_wqe)->ee_nds =
cpu_to_be32(MTHCA_NEXT_DBD | size |
((wr->send_flags & IB_SEND_FENCE) ?
MTHCA_NEXT_FENCE : 0));
if (!nreq) {
size0 = size;
op0 = mthca_opcode[wr->opcode];
f0 = wr->send_flags & IB_SEND_FENCE ?
MTHCA_SEND_DOORBELL_FENCE : 0;
}
++ind;
if (unlikely(ind >= qp->sq.max))
ind -= qp->sq.max;
}
out:
if (likely(nreq)) {
dbhi = (nreq << 24) | ((qp->sq.head & 0xffff) << 8) | f0 | op0;
qp->sq.head += nreq;
/*
* Make sure that descriptors are written before
* doorbell record.
*/
wmb();
*qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff);
/*
* Make sure doorbell record is written before we
* write MMIO send doorbell.
*/
wmb();
mthca_write64(dbhi, (qp->qpn << 8) | size0, dev->kar + MTHCA_SEND_DOORBELL,
MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
}
/*
* Make sure doorbells don't leak out of SQ spinlock and reach
* the HCA out of order:
*/
mmiowb();
spin_unlock_irqrestore(&qp->sq.lock, flags);
return err;
}
int mthca_arbel_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
unsigned long flags;
int err = 0;
int nreq;
int ind;
int i;
void *wqe;
spin_lock_irqsave(&qp->rq.lock, flags);
/* XXX check that state is OK to post receive */
ind = qp->rq.head & (qp->rq.max - 1);
for (nreq = 0; wr; ++nreq, wr = wr->next) {
if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
mthca_err(dev, "RQ %06x full (%u head, %u tail,"
" %d max, %d nreq)\n", qp->qpn,
qp->rq.head, qp->rq.tail,
qp->rq.max, nreq);
err = -ENOMEM;
*bad_wr = wr;
goto out;
}
wqe = get_recv_wqe(qp, ind);
((struct mthca_next_seg *) wqe)->flags = 0;
wqe += sizeof (struct mthca_next_seg);
if (unlikely(wr->num_sge > qp->rq.max_gs)) {
err = -EINVAL;
*bad_wr = wr;
goto out;
}
for (i = 0; i < wr->num_sge; ++i) {
mthca_set_data_seg(wqe, wr->sg_list + i);
wqe += sizeof (struct mthca_data_seg);
}
if (i < qp->rq.max_gs)
mthca_set_data_seg_inval(wqe);
qp->wrid[ind] = wr->wr_id;
++ind;
if (unlikely(ind >= qp->rq.max))
ind -= qp->rq.max;
}
out:
if (likely(nreq)) {
qp->rq.head += nreq;
/*
* Make sure that descriptors are written before
* doorbell record.
*/
wmb();
*qp->rq.db = cpu_to_be32(qp->rq.head & 0xffff);
}
spin_unlock_irqrestore(&qp->rq.lock, flags);
return err;
}
void mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send,
int index, int *dbd, __be32 *new_wqe)
{
struct mthca_next_seg *next;
/*
* For SRQs, all receive WQEs generate a CQE, so we're always
* at the end of the doorbell chain.
*/
if (qp->ibqp.srq && !is_send) {
*new_wqe = 0;
return;
}
if (is_send)
next = get_send_wqe(qp, index);
else
next = get_recv_wqe(qp, index);
*dbd = !!(next->ee_nds & cpu_to_be32(MTHCA_NEXT_DBD));
if (next->ee_nds & cpu_to_be32(0x3f))
*new_wqe = (next->nda_op & cpu_to_be32(~0x3f)) |
(next->ee_nds & cpu_to_be32(0x3f));
else
*new_wqe = 0;
}
int mthca_init_qp_table(struct mthca_dev *dev)
{
int err;
int i;
spin_lock_init(&dev->qp_table.lock);
/*
* We reserve 2 extra QPs per port for the special QPs. The
* special QP for port 1 has to be even, so round up.
*/
dev->qp_table.sqp_start = (dev->limits.reserved_qps + 1) & ~1UL;
err = mthca_alloc_init(&dev->qp_table.alloc,
dev->limits.num_qps,
(1 << 24) - 1,
dev->qp_table.sqp_start +
MTHCA_MAX_PORTS * 2);
if (err)
return err;
err = mthca_array_init(&dev->qp_table.qp,
dev->limits.num_qps);
if (err) {
mthca_alloc_cleanup(&dev->qp_table.alloc);
return err;
}
for (i = 0; i < 2; ++i) {
err = mthca_CONF_SPECIAL_QP(dev, i ? IB_QPT_GSI : IB_QPT_SMI,
dev->qp_table.sqp_start + i * 2);
if (err) {
mthca_warn(dev, "CONF_SPECIAL_QP returned "
"%d, aborting.\n", err);
goto err_out;
}
}
return 0;
err_out:
for (i = 0; i < 2; ++i)
mthca_CONF_SPECIAL_QP(dev, i, 0);
mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps);
mthca_alloc_cleanup(&dev->qp_table.alloc);
return err;
}
void mthca_cleanup_qp_table(struct mthca_dev *dev)
{
int i;
for (i = 0; i < 2; ++i)
mthca_CONF_SPECIAL_QP(dev, i, 0);
mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps);
mthca_alloc_cleanup(&dev->qp_table.alloc);
}
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