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linux-stable/drivers/infiniband/hw/mthca/mthca_qp.c
Mark Bloch 1fb7f8973f RDMA: Support more than 255 rdma ports 
Current code uses many different types when dealing with a port of a RDMA
device: u8, unsigned int and u32. Switch to u32 to clean up the logic.

This allows us to make (at least) the core view consistent and use the
same type. Unfortunately not all places can be converted. Many uverbs
functions expect port to be u8 so keep those places in order not to break
UAPIs.  HW/Spec defined values must also not be changed.

With the switch to u32 we now can support devices with more than 255
ports. U32_MAX is reserved to make control logic a bit easier to deal
with. As a device with U32_MAX ports probably isn't going to happen any
time soon this seems like a non issue.

When a device with more than 255 ports is created uverbs will report the
RDMA device as having 255 ports as this is the max currently supported.

The verbs interface is not changed yet because the IBTA spec limits the
port size in too many places to be u8 and all applications that relies in
verbs won't be able to cope with this change. At this stage, we are
extending the interfaces that are using vendor channel solely

Once the limitation is lifted mlx5 in switchdev mode will be able to have
thousands of SFs created by the device. As the only instance of an RDMA
device that reports more than 255 ports will be a representor device and
it exposes itself as a RAW Ethernet only device CM/MAD/IPoIB and other
ULPs aren't effected by this change and their sysfs/interfaces that are
exposes to userspace can remain unchanged.

While here cleanup some alignment issues and remove unneeded sanity
checks (mainly in rdmavt),

Link: https://lore.kernel.org/r/20210301070420.439400-1-leon@kernel.org
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-03-26 09:31:21 -03:00

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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 <rdma/uverbs_ioctl.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];
} __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];
} __packed;
struct mthca_qp_param {
__be32 opt_param_mask;
u32 reserved1;
struct mthca_qp_context context;
u32 reserved2[62];
} __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 ib_udata *udata)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
struct mthca_qp *qp = to_mqp(ibqp);
struct mthca_ucontext *context = rdma_udata_to_drv_context(
udata, struct mthca_ucontext, ibucontext);
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(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(qp->sqp, 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;
if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
return -EOPNOTSUPP;
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)) {
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,
udata);
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,
struct ib_udata *udata)
{
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 (udata)
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,
struct ib_udata *udata)
{
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, udata);
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 (udata)
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,
struct ib_udata *udata)
{
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, udata);
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,
u32 port,
struct mthca_qp *qp,
struct ib_udata *udata)
{
u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1;
int err;
qp->transport = MLX;
err = mthca_set_qp_size(dev, cap, pd, qp);
if (err)
return err;
qp->sqp->header_buf_size = qp->sq.max * MTHCA_UD_HEADER_SIZE;
qp->sqp->header_buf =
dma_alloc_coherent(&dev->pdev->dev, qp->sqp->header_buf_size,
&qp->sqp->header_dma, GFP_KERNEL);
if (!qp->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, qp->sqp);
spin_unlock_irq(&dev->qp_table.lock);
if (err)
goto err_out;
qp->port = port;
qp->qpn = mqpn;
qp->transport = MLX;
err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
send_policy, qp, udata);
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, qp->sqp->header_buf_size,
qp->sqp->header_buf, qp->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, qp->sqp->header_buf_size,
qp->sqp->header_buf, qp->sqp->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_qp *qp, int ind,
const struct ib_ud_wr *wr,
struct mthca_mlx_seg *mlx,
struct mthca_data_seg *data)
{
struct mthca_sqp *sqp = qp->sqp;
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((!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 = !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 (!qp->ibqp.qp_num)
ib_get_cached_pkey(&dev->ib_dev, qp->port, sqp->pkey_index,
&pkey);
else
ib_get_cached_pkey(&dev->ib_dev, 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(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(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 size0;
u32 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, 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));
}
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 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;
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 size0;
u32 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, 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));
}
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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