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OpenCloudOS-Kernel/drivers/infiniband/hw/qib/qib_verbs.c

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/*
* Copyright (c) 2012, 2013 Intel Corporation. All rights reserved.
* Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
* Copyright (c) 2005, 2006 PathScale, 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 <rdma/ib_mad.h>
#include <rdma/ib_user_verbs.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/utsname.h>
#include <linux/rculist.h>
#include <linux/mm.h>
#include <linux/random.h>
#include <linux/vmalloc.h>
#include <rdma/rdma_vt.h>
#include "qib.h"
#include "qib_common.h"
static unsigned int ib_qib_qp_table_size = 256;
module_param_named(qp_table_size, ib_qib_qp_table_size, uint, S_IRUGO);
MODULE_PARM_DESC(qp_table_size, "QP table size");
static unsigned int qib_lkey_table_size = 16;
module_param_named(lkey_table_size, qib_lkey_table_size, uint,
S_IRUGO);
MODULE_PARM_DESC(lkey_table_size,
"LKEY table size in bits (2^n, 1 <= n <= 23)");
static unsigned int ib_qib_max_pds = 0xFFFF;
module_param_named(max_pds, ib_qib_max_pds, uint, S_IRUGO);
MODULE_PARM_DESC(max_pds,
"Maximum number of protection domains to support");
static unsigned int ib_qib_max_ahs = 0xFFFF;
module_param_named(max_ahs, ib_qib_max_ahs, uint, S_IRUGO);
MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
unsigned int ib_qib_max_cqes = 0x2FFFF;
module_param_named(max_cqes, ib_qib_max_cqes, uint, S_IRUGO);
MODULE_PARM_DESC(max_cqes,
"Maximum number of completion queue entries to support");
unsigned int ib_qib_max_cqs = 0x1FFFF;
module_param_named(max_cqs, ib_qib_max_cqs, uint, S_IRUGO);
MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
unsigned int ib_qib_max_qp_wrs = 0x3FFF;
module_param_named(max_qp_wrs, ib_qib_max_qp_wrs, uint, S_IRUGO);
MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
unsigned int ib_qib_max_qps = 16384;
module_param_named(max_qps, ib_qib_max_qps, uint, S_IRUGO);
MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
unsigned int ib_qib_max_sges = 0x60;
module_param_named(max_sges, ib_qib_max_sges, uint, S_IRUGO);
MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
unsigned int ib_qib_max_mcast_grps = 16384;
module_param_named(max_mcast_grps, ib_qib_max_mcast_grps, uint, S_IRUGO);
MODULE_PARM_DESC(max_mcast_grps,
"Maximum number of multicast groups to support");
unsigned int ib_qib_max_mcast_qp_attached = 16;
module_param_named(max_mcast_qp_attached, ib_qib_max_mcast_qp_attached,
uint, S_IRUGO);
MODULE_PARM_DESC(max_mcast_qp_attached,
"Maximum number of attached QPs to support");
unsigned int ib_qib_max_srqs = 1024;
module_param_named(max_srqs, ib_qib_max_srqs, uint, S_IRUGO);
MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
unsigned int ib_qib_max_srq_sges = 128;
module_param_named(max_srq_sges, ib_qib_max_srq_sges, uint, S_IRUGO);
MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
unsigned int ib_qib_max_srq_wrs = 0x1FFFF;
module_param_named(max_srq_wrs, ib_qib_max_srq_wrs, uint, S_IRUGO);
MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
static unsigned int ib_qib_disable_sma;
module_param_named(disable_sma, ib_qib_disable_sma, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(disable_sma, "Disable the SMA");
/*
* Translate ib_wr_opcode into ib_wc_opcode.
*/
const enum ib_wc_opcode ib_qib_wc_opcode[] = {
[IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
[IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
[IB_WR_SEND] = IB_WC_SEND,
[IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
[IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
[IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
[IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
};
/*
* System image GUID.
*/
__be64 ib_qib_sys_image_guid;
/**
* qib_copy_sge - copy data to SGE memory
* @ss: the SGE state
* @data: the data to copy
* @length: the length of the data
*/
void qib_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, int release)
{
struct rvt_sge *sge = &ss->sge;
while (length) {
u32 len = sge->length;
if (len > length)
len = length;
if (len > sge->sge_length)
len = sge->sge_length;
BUG_ON(len == 0);
memcpy(sge->vaddr, data, len);
sge->vaddr += len;
sge->length -= len;
sge->sge_length -= len;
if (sge->sge_length == 0) {
if (release)
rvt_put_mr(sge->mr);
if (--ss->num_sge)
*sge = *ss->sg_list++;
} else if (sge->length == 0 && sge->mr->lkey) {
if (++sge->n >= RVT_SEGSZ) {
if (++sge->m >= sge->mr->mapsz)
break;
sge->n = 0;
}
sge->vaddr =
sge->mr->map[sge->m]->segs[sge->n].vaddr;
sge->length =
sge->mr->map[sge->m]->segs[sge->n].length;
}
data += len;
length -= len;
}
}
/**
* qib_skip_sge - skip over SGE memory - XXX almost dup of prev func
* @ss: the SGE state
* @length: the number of bytes to skip
*/
void qib_skip_sge(struct rvt_sge_state *ss, u32 length, int release)
{
struct rvt_sge *sge = &ss->sge;
while (length) {
u32 len = sge->length;
if (len > length)
len = length;
if (len > sge->sge_length)
len = sge->sge_length;
BUG_ON(len == 0);
sge->vaddr += len;
sge->length -= len;
sge->sge_length -= len;
if (sge->sge_length == 0) {
if (release)
rvt_put_mr(sge->mr);
if (--ss->num_sge)
*sge = *ss->sg_list++;
} else if (sge->length == 0 && sge->mr->lkey) {
if (++sge->n >= RVT_SEGSZ) {
if (++sge->m >= sge->mr->mapsz)
break;
sge->n = 0;
}
sge->vaddr =
sge->mr->map[sge->m]->segs[sge->n].vaddr;
sge->length =
sge->mr->map[sge->m]->segs[sge->n].length;
}
length -= len;
}
}
/*
* Count the number of DMA descriptors needed to send length bytes of data.
* Don't modify the qib_sge_state to get the count.
* Return zero if any of the segments is not aligned.
*/
static u32 qib_count_sge(struct rvt_sge_state *ss, u32 length)
{
struct rvt_sge *sg_list = ss->sg_list;
struct rvt_sge sge = ss->sge;
u8 num_sge = ss->num_sge;
u32 ndesc = 1; /* count the header */
while (length) {
u32 len = sge.length;
if (len > length)
len = length;
if (len > sge.sge_length)
len = sge.sge_length;
BUG_ON(len == 0);
if (((long) sge.vaddr & (sizeof(u32) - 1)) ||
(len != length && (len & (sizeof(u32) - 1)))) {
ndesc = 0;
break;
}
ndesc++;
sge.vaddr += len;
sge.length -= len;
sge.sge_length -= len;
if (sge.sge_length == 0) {
if (--num_sge)
sge = *sg_list++;
} else if (sge.length == 0 && sge.mr->lkey) {
if (++sge.n >= RVT_SEGSZ) {
if (++sge.m >= sge.mr->mapsz)
break;
sge.n = 0;
}
sge.vaddr =
sge.mr->map[sge.m]->segs[sge.n].vaddr;
sge.length =
sge.mr->map[sge.m]->segs[sge.n].length;
}
length -= len;
}
return ndesc;
}
/*
* Copy from the SGEs to the data buffer.
*/
static void qib_copy_from_sge(void *data, struct rvt_sge_state *ss, u32 length)
{
struct rvt_sge *sge = &ss->sge;
while (length) {
u32 len = sge->length;
if (len > length)
len = length;
if (len > sge->sge_length)
len = sge->sge_length;
BUG_ON(len == 0);
memcpy(data, sge->vaddr, len);
sge->vaddr += len;
sge->length -= len;
sge->sge_length -= len;
if (sge->sge_length == 0) {
if (--ss->num_sge)
*sge = *ss->sg_list++;
} else if (sge->length == 0 && sge->mr->lkey) {
if (++sge->n >= RVT_SEGSZ) {
if (++sge->m >= sge->mr->mapsz)
break;
sge->n = 0;
}
sge->vaddr =
sge->mr->map[sge->m]->segs[sge->n].vaddr;
sge->length =
sge->mr->map[sge->m]->segs[sge->n].length;
}
data += len;
length -= len;
}
}
/**
* qib_qp_rcv - processing an incoming packet on a QP
* @rcd: the context pointer
* @hdr: the packet header
* @has_grh: true if the packet has a GRH
* @data: the packet data
* @tlen: the packet length
* @qp: the QP the packet came on
*
* This is called from qib_ib_rcv() to process an incoming packet
* for the given QP.
* Called at interrupt level.
*/
static void qib_qp_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
int has_grh, void *data, u32 tlen, struct rvt_qp *qp)
{
struct qib_ibport *ibp = &rcd->ppd->ibport_data;
spin_lock(&qp->r_lock);
/* Check for valid receive state. */
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) {
ibp->rvp.n_pkt_drops++;
goto unlock;
}
switch (qp->ibqp.qp_type) {
case IB_QPT_SMI:
case IB_QPT_GSI:
if (ib_qib_disable_sma)
break;
/* FALLTHROUGH */
case IB_QPT_UD:
qib_ud_rcv(ibp, hdr, has_grh, data, tlen, qp);
break;
case IB_QPT_RC:
qib_rc_rcv(rcd, hdr, has_grh, data, tlen, qp);
break;
case IB_QPT_UC:
qib_uc_rcv(ibp, hdr, has_grh, data, tlen, qp);
break;
default:
break;
}
unlock:
spin_unlock(&qp->r_lock);
}
/**
* qib_ib_rcv - process an incoming packet
* @rcd: the context pointer
* @rhdr: the header of the packet
* @data: the packet payload
* @tlen: the packet length
*
* This is called from qib_kreceive() to process an incoming packet at
* interrupt level. Tlen is the length of the header + data + CRC in bytes.
*/
void qib_ib_rcv(struct qib_ctxtdata *rcd, void *rhdr, void *data, u32 tlen)
{
struct qib_pportdata *ppd = rcd->ppd;
struct qib_ibport *ibp = &ppd->ibport_data;
struct qib_ib_header *hdr = rhdr;
struct qib_devdata *dd = ppd->dd;
struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
struct qib_other_headers *ohdr;
struct rvt_qp *qp;
u32 qp_num;
int lnh;
u8 opcode;
u16 lid;
/* 24 == LRH+BTH+CRC */
if (unlikely(tlen < 24))
goto drop;
/* Check for a valid destination LID (see ch. 7.11.1). */
lid = be16_to_cpu(hdr->lrh[1]);
if (lid < be16_to_cpu(IB_MULTICAST_LID_BASE)) {
lid &= ~((1 << ppd->lmc) - 1);
if (unlikely(lid != ppd->lid))
goto drop;
}
/* Check for GRH */
lnh = be16_to_cpu(hdr->lrh[0]) & 3;
if (lnh == QIB_LRH_BTH)
ohdr = &hdr->u.oth;
else if (lnh == QIB_LRH_GRH) {
u32 vtf;
ohdr = &hdr->u.l.oth;
if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
goto drop;
vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
goto drop;
} else
goto drop;
opcode = (be32_to_cpu(ohdr->bth[0]) >> 24) & 0x7f;
#ifdef CONFIG_DEBUG_FS
rcd->opstats->stats[opcode].n_bytes += tlen;
rcd->opstats->stats[opcode].n_packets++;
#endif
/* Get the destination QP number. */
qp_num = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK;
if (qp_num == QIB_MULTICAST_QPN) {
struct rvt_mcast *mcast;
struct rvt_mcast_qp *p;
if (lnh != QIB_LRH_GRH)
goto drop;
mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid);
if (mcast == NULL)
goto drop;
this_cpu_inc(ibp->pmastats->n_multicast_rcv);
list_for_each_entry_rcu(p, &mcast->qp_list, list)
qib_qp_rcv(rcd, hdr, 1, data, tlen, p->qp);
/*
* Notify rvt_multicast_detach() if it is waiting for us
* to finish.
*/
if (atomic_dec_return(&mcast->refcount) <= 1)
wake_up(&mcast->wait);
} else {
rcu_read_lock();
qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
if (!qp) {
rcu_read_unlock();
goto drop;
}
this_cpu_inc(ibp->pmastats->n_unicast_rcv);
qib_qp_rcv(rcd, hdr, lnh == QIB_LRH_GRH, data, tlen, qp);
rcu_read_unlock();
}
return;
drop:
ibp->rvp.n_pkt_drops++;
}
/*
* This is called from a timer to check for QPs
* which need kernel memory in order to send a packet.
*/
static void mem_timer(unsigned long data)
{
struct qib_ibdev *dev = (struct qib_ibdev *) data;
struct list_head *list = &dev->memwait;
struct rvt_qp *qp = NULL;
struct qib_qp_priv *priv = NULL;
unsigned long flags;
spin_lock_irqsave(&dev->rdi.pending_lock, flags);
if (!list_empty(list)) {
priv = list_entry(list->next, struct qib_qp_priv, iowait);
qp = priv->owner;
list_del_init(&priv->iowait);
atomic_inc(&qp->refcount);
if (!list_empty(list))
mod_timer(&dev->mem_timer, jiffies + 1);
}
spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
if (qp) {
spin_lock_irqsave(&qp->s_lock, flags);
if (qp->s_flags & RVT_S_WAIT_KMEM) {
qp->s_flags &= ~RVT_S_WAIT_KMEM;
qib_schedule_send(qp);
}
spin_unlock_irqrestore(&qp->s_lock, flags);
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
}
}
static void update_sge(struct rvt_sge_state *ss, u32 length)
{
struct rvt_sge *sge = &ss->sge;
sge->vaddr += length;
sge->length -= length;
sge->sge_length -= length;
if (sge->sge_length == 0) {
if (--ss->num_sge)
*sge = *ss->sg_list++;
} else if (sge->length == 0 && sge->mr->lkey) {
if (++sge->n >= RVT_SEGSZ) {
if (++sge->m >= sge->mr->mapsz)
return;
sge->n = 0;
}
sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr;
sge->length = sge->mr->map[sge->m]->segs[sge->n].length;
}
}
#ifdef __LITTLE_ENDIAN
static inline u32 get_upper_bits(u32 data, u32 shift)
{
return data >> shift;
}
static inline u32 set_upper_bits(u32 data, u32 shift)
{
return data << shift;
}
static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off)
{
data <<= ((sizeof(u32) - n) * BITS_PER_BYTE);
data >>= ((sizeof(u32) - n - off) * BITS_PER_BYTE);
return data;
}
#else
static inline u32 get_upper_bits(u32 data, u32 shift)
{
return data << shift;
}
static inline u32 set_upper_bits(u32 data, u32 shift)
{
return data >> shift;
}
static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off)
{
data >>= ((sizeof(u32) - n) * BITS_PER_BYTE);
data <<= ((sizeof(u32) - n - off) * BITS_PER_BYTE);
return data;
}
#endif
static void copy_io(u32 __iomem *piobuf, struct rvt_sge_state *ss,
u32 length, unsigned flush_wc)
{
u32 extra = 0;
u32 data = 0;
u32 last;
while (1) {
u32 len = ss->sge.length;
u32 off;
if (len > length)
len = length;
if (len > ss->sge.sge_length)
len = ss->sge.sge_length;
BUG_ON(len == 0);
/* If the source address is not aligned, try to align it. */
off = (unsigned long)ss->sge.vaddr & (sizeof(u32) - 1);
if (off) {
u32 *addr = (u32 *)((unsigned long)ss->sge.vaddr &
~(sizeof(u32) - 1));
u32 v = get_upper_bits(*addr, off * BITS_PER_BYTE);
u32 y;
y = sizeof(u32) - off;
if (len > y)
len = y;
if (len + extra >= sizeof(u32)) {
data |= set_upper_bits(v, extra *
BITS_PER_BYTE);
len = sizeof(u32) - extra;
if (len == length) {
last = data;
break;
}
__raw_writel(data, piobuf);
piobuf++;
extra = 0;
data = 0;
} else {
/* Clear unused upper bytes */
data |= clear_upper_bytes(v, len, extra);
if (len == length) {
last = data;
break;
}
extra += len;
}
} else if (extra) {
/* Source address is aligned. */
u32 *addr = (u32 *) ss->sge.vaddr;
int shift = extra * BITS_PER_BYTE;
int ushift = 32 - shift;
u32 l = len;
while (l >= sizeof(u32)) {
u32 v = *addr;
data |= set_upper_bits(v, shift);
__raw_writel(data, piobuf);
data = get_upper_bits(v, ushift);
piobuf++;
addr++;
l -= sizeof(u32);
}
/*
* We still have 'extra' number of bytes leftover.
*/
if (l) {
u32 v = *addr;
if (l + extra >= sizeof(u32)) {
data |= set_upper_bits(v, shift);
len -= l + extra - sizeof(u32);
if (len == length) {
last = data;
break;
}
__raw_writel(data, piobuf);
piobuf++;
extra = 0;
data = 0;
} else {
/* Clear unused upper bytes */
data |= clear_upper_bytes(v, l, extra);
if (len == length) {
last = data;
break;
}
extra += l;
}
} else if (len == length) {
last = data;
break;
}
} else if (len == length) {
u32 w;
/*
* Need to round up for the last dword in the
* packet.
*/
w = (len + 3) >> 2;
qib_pio_copy(piobuf, ss->sge.vaddr, w - 1);
piobuf += w - 1;
last = ((u32 *) ss->sge.vaddr)[w - 1];
break;
} else {
u32 w = len >> 2;
qib_pio_copy(piobuf, ss->sge.vaddr, w);
piobuf += w;
extra = len & (sizeof(u32) - 1);
if (extra) {
u32 v = ((u32 *) ss->sge.vaddr)[w];
/* Clear unused upper bytes */
data = clear_upper_bytes(v, extra, 0);
}
}
update_sge(ss, len);
length -= len;
}
/* Update address before sending packet. */
update_sge(ss, length);
if (flush_wc) {
/* must flush early everything before trigger word */
qib_flush_wc();
__raw_writel(last, piobuf);
/* be sure trigger word is written */
qib_flush_wc();
} else
__raw_writel(last, piobuf);
}
static noinline struct qib_verbs_txreq *__get_txreq(struct qib_ibdev *dev,
struct rvt_qp *qp)
{
struct qib_qp_priv *priv = qp->priv;
struct qib_verbs_txreq *tx;
unsigned long flags;
spin_lock_irqsave(&qp->s_lock, flags);
spin_lock(&dev->rdi.pending_lock);
if (!list_empty(&dev->txreq_free)) {
struct list_head *l = dev->txreq_free.next;
list_del(l);
spin_unlock(&dev->rdi.pending_lock);
spin_unlock_irqrestore(&qp->s_lock, flags);
tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
} else {
if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK &&
list_empty(&priv->iowait)) {
dev->n_txwait++;
qp->s_flags |= RVT_S_WAIT_TX;
list_add_tail(&priv->iowait, &dev->txwait);
}
qp->s_flags &= ~RVT_S_BUSY;
spin_unlock(&dev->rdi.pending_lock);
spin_unlock_irqrestore(&qp->s_lock, flags);
tx = ERR_PTR(-EBUSY);
}
return tx;
}
static inline struct qib_verbs_txreq *get_txreq(struct qib_ibdev *dev,
struct rvt_qp *qp)
{
struct qib_verbs_txreq *tx;
unsigned long flags;
spin_lock_irqsave(&dev->rdi.pending_lock, flags);
/* assume the list non empty */
if (likely(!list_empty(&dev->txreq_free))) {
struct list_head *l = dev->txreq_free.next;
list_del(l);
spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
} else {
/* call slow path to get the extra lock */
spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
tx = __get_txreq(dev, qp);
}
return tx;
}
void qib_put_txreq(struct qib_verbs_txreq *tx)
{
struct qib_ibdev *dev;
struct rvt_qp *qp;
struct qib_qp_priv *priv;
unsigned long flags;
qp = tx->qp;
dev = to_idev(qp->ibqp.device);
if (tx->mr) {
rvt_put_mr(tx->mr);
tx->mr = NULL;
}
if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF) {
tx->txreq.flags &= ~QIB_SDMA_TXREQ_F_FREEBUF;
dma_unmap_single(&dd_from_dev(dev)->pcidev->dev,
tx->txreq.addr, tx->hdr_dwords << 2,
DMA_TO_DEVICE);
kfree(tx->align_buf);
}
spin_lock_irqsave(&dev->rdi.pending_lock, flags);
/* Put struct back on free list */
list_add(&tx->txreq.list, &dev->txreq_free);
if (!list_empty(&dev->txwait)) {
/* Wake up first QP wanting a free struct */
priv = list_entry(dev->txwait.next, struct qib_qp_priv,
iowait);
qp = priv->owner;
list_del_init(&priv->iowait);
atomic_inc(&qp->refcount);
spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
spin_lock_irqsave(&qp->s_lock, flags);
if (qp->s_flags & RVT_S_WAIT_TX) {
qp->s_flags &= ~RVT_S_WAIT_TX;
qib_schedule_send(qp);
}
spin_unlock_irqrestore(&qp->s_lock, flags);
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
} else
spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
}
/*
* This is called when there are send DMA descriptors that might be
* available.
*
* This is called with ppd->sdma_lock held.
*/
void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail)
{
struct rvt_qp *qp, *nqp;
struct qib_qp_priv *qpp, *nqpp;
struct rvt_qp *qps[20];
struct qib_ibdev *dev;
unsigned i, n;
n = 0;
dev = &ppd->dd->verbs_dev;
spin_lock(&dev->rdi.pending_lock);
/* Search wait list for first QP wanting DMA descriptors. */
list_for_each_entry_safe(qpp, nqpp, &dev->dmawait, iowait) {
qp = qpp->owner;
nqp = nqpp->owner;
if (qp->port_num != ppd->port)
continue;
if (n == ARRAY_SIZE(qps))
break;
if (qpp->s_tx->txreq.sg_count > avail)
break;
avail -= qpp->s_tx->txreq.sg_count;
list_del_init(&qpp->iowait);
atomic_inc(&qp->refcount);
qps[n++] = qp;
}
spin_unlock(&dev->rdi.pending_lock);
for (i = 0; i < n; i++) {
qp = qps[i];
spin_lock(&qp->s_lock);
if (qp->s_flags & RVT_S_WAIT_DMA_DESC) {
qp->s_flags &= ~RVT_S_WAIT_DMA_DESC;
qib_schedule_send(qp);
}
spin_unlock(&qp->s_lock);
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
}
}
/*
* This is called with ppd->sdma_lock held.
*/
static void sdma_complete(struct qib_sdma_txreq *cookie, int status)
{
struct qib_verbs_txreq *tx =
container_of(cookie, struct qib_verbs_txreq, txreq);
struct rvt_qp *qp = tx->qp;
struct qib_qp_priv *priv = qp->priv;
spin_lock(&qp->s_lock);
if (tx->wqe)
qib_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
else if (qp->ibqp.qp_type == IB_QPT_RC) {
struct qib_ib_header *hdr;
if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF)
hdr = &tx->align_buf->hdr;
else {
struct qib_ibdev *dev = to_idev(qp->ibqp.device);
hdr = &dev->pio_hdrs[tx->hdr_inx].hdr;
}
qib_rc_send_complete(qp, hdr);
}
if (atomic_dec_and_test(&priv->s_dma_busy)) {
if (qp->state == IB_QPS_RESET)
wake_up(&priv->wait_dma);
else if (qp->s_flags & RVT_S_WAIT_DMA) {
qp->s_flags &= ~RVT_S_WAIT_DMA;
qib_schedule_send(qp);
}
}
spin_unlock(&qp->s_lock);
qib_put_txreq(tx);
}
static int wait_kmem(struct qib_ibdev *dev, struct rvt_qp *qp)
{
struct qib_qp_priv *priv = qp->priv;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&qp->s_lock, flags);
if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
spin_lock(&dev->rdi.pending_lock);
if (list_empty(&priv->iowait)) {
if (list_empty(&dev->memwait))
mod_timer(&dev->mem_timer, jiffies + 1);
qp->s_flags |= RVT_S_WAIT_KMEM;
list_add_tail(&priv->iowait, &dev->memwait);
}
spin_unlock(&dev->rdi.pending_lock);
qp->s_flags &= ~RVT_S_BUSY;
ret = -EBUSY;
}
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}
static int qib_verbs_send_dma(struct rvt_qp *qp, struct qib_ib_header *hdr,
u32 hdrwords, struct rvt_sge_state *ss, u32 len,
u32 plen, u32 dwords)
{
struct qib_qp_priv *priv = qp->priv;
struct qib_ibdev *dev = to_idev(qp->ibqp.device);
struct qib_devdata *dd = dd_from_dev(dev);
struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
struct qib_pportdata *ppd = ppd_from_ibp(ibp);
struct qib_verbs_txreq *tx;
struct qib_pio_header *phdr;
u32 control;
u32 ndesc;
int ret;
tx = priv->s_tx;
if (tx) {
priv->s_tx = NULL;
/* resend previously constructed packet */
ret = qib_sdma_verbs_send(ppd, tx->ss, tx->dwords, tx);
goto bail;
}
tx = get_txreq(dev, qp);
if (IS_ERR(tx))
goto bail_tx;
control = dd->f_setpbc_control(ppd, plen, qp->s_srate,
be16_to_cpu(hdr->lrh[0]) >> 12);
tx->qp = qp;
tx->wqe = qp->s_wqe;
tx->mr = qp->s_rdma_mr;
if (qp->s_rdma_mr)
qp->s_rdma_mr = NULL;
tx->txreq.callback = sdma_complete;
if (dd->flags & QIB_HAS_SDMA_TIMEOUT)
tx->txreq.flags = QIB_SDMA_TXREQ_F_HEADTOHOST;
else
tx->txreq.flags = QIB_SDMA_TXREQ_F_INTREQ;
if (plen + 1 > dd->piosize2kmax_dwords)
tx->txreq.flags |= QIB_SDMA_TXREQ_F_USELARGEBUF;
if (len) {
/*
* Don't try to DMA if it takes more descriptors than
* the queue holds.
*/
ndesc = qib_count_sge(ss, len);
if (ndesc >= ppd->sdma_descq_cnt)
ndesc = 0;
} else
ndesc = 1;
if (ndesc) {
phdr = &dev->pio_hdrs[tx->hdr_inx];
phdr->pbc[0] = cpu_to_le32(plen);
phdr->pbc[1] = cpu_to_le32(control);
memcpy(&phdr->hdr, hdr, hdrwords << 2);
tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEDESC;
tx->txreq.sg_count = ndesc;
tx->txreq.addr = dev->pio_hdrs_phys +
tx->hdr_inx * sizeof(struct qib_pio_header);
tx->hdr_dwords = hdrwords + 2; /* add PBC length */
ret = qib_sdma_verbs_send(ppd, ss, dwords, tx);
goto bail;
}
/* Allocate a buffer and copy the header and payload to it. */
tx->hdr_dwords = plen + 1;
phdr = kmalloc(tx->hdr_dwords << 2, GFP_ATOMIC);
if (!phdr)
goto err_tx;
phdr->pbc[0] = cpu_to_le32(plen);
phdr->pbc[1] = cpu_to_le32(control);
memcpy(&phdr->hdr, hdr, hdrwords << 2);
qib_copy_from_sge((u32 *) &phdr->hdr + hdrwords, ss, len);
tx->txreq.addr = dma_map_single(&dd->pcidev->dev, phdr,
tx->hdr_dwords << 2, DMA_TO_DEVICE);
if (dma_mapping_error(&dd->pcidev->dev, tx->txreq.addr))
goto map_err;
tx->align_buf = phdr;
tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEBUF;
tx->txreq.sg_count = 1;
ret = qib_sdma_verbs_send(ppd, NULL, 0, tx);
goto unaligned;
map_err:
kfree(phdr);
err_tx:
qib_put_txreq(tx);
ret = wait_kmem(dev, qp);
unaligned:
ibp->rvp.n_unaligned++;
bail:
return ret;
bail_tx:
ret = PTR_ERR(tx);
goto bail;
}
/*
* If we are now in the error state, return zero to flush the
* send work request.
*/
static int no_bufs_available(struct rvt_qp *qp)
{
struct qib_qp_priv *priv = qp->priv;
struct qib_ibdev *dev = to_idev(qp->ibqp.device);
struct qib_devdata *dd;
unsigned long flags;
int ret = 0;
/*
* Note that as soon as want_buffer() is called and
* possibly before it returns, qib_ib_piobufavail()
* could be called. Therefore, put QP on the I/O wait list before
* enabling the PIO avail interrupt.
*/
spin_lock_irqsave(&qp->s_lock, flags);
if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
spin_lock(&dev->rdi.pending_lock);
if (list_empty(&priv->iowait)) {
dev->n_piowait++;
qp->s_flags |= RVT_S_WAIT_PIO;
list_add_tail(&priv->iowait, &dev->piowait);
dd = dd_from_dev(dev);
dd->f_wantpiobuf_intr(dd, 1);
}
spin_unlock(&dev->rdi.pending_lock);
qp->s_flags &= ~RVT_S_BUSY;
ret = -EBUSY;
}
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}
static int qib_verbs_send_pio(struct rvt_qp *qp, struct qib_ib_header *ibhdr,
u32 hdrwords, struct rvt_sge_state *ss, u32 len,
u32 plen, u32 dwords)
{
struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device);
struct qib_pportdata *ppd = dd->pport + qp->port_num - 1;
u32 *hdr = (u32 *) ibhdr;
u32 __iomem *piobuf_orig;
u32 __iomem *piobuf;
u64 pbc;
unsigned long flags;
unsigned flush_wc;
u32 control;
u32 pbufn;
control = dd->f_setpbc_control(ppd, plen, qp->s_srate,
be16_to_cpu(ibhdr->lrh[0]) >> 12);
pbc = ((u64) control << 32) | plen;
piobuf = dd->f_getsendbuf(ppd, pbc, &pbufn);
if (unlikely(piobuf == NULL))
return no_bufs_available(qp);
/*
* Write the pbc.
* We have to flush after the PBC for correctness on some cpus
* or WC buffer can be written out of order.
*/
writeq(pbc, piobuf);
piobuf_orig = piobuf;
piobuf += 2;
flush_wc = dd->flags & QIB_PIO_FLUSH_WC;
if (len == 0) {
/*
* If there is just the header portion, must flush before
* writing last word of header for correctness, and after
* the last header word (trigger word).
*/
if (flush_wc) {
qib_flush_wc();
qib_pio_copy(piobuf, hdr, hdrwords - 1);
qib_flush_wc();
__raw_writel(hdr[hdrwords - 1], piobuf + hdrwords - 1);
qib_flush_wc();
} else
qib_pio_copy(piobuf, hdr, hdrwords);
goto done;
}
if (flush_wc)
qib_flush_wc();
qib_pio_copy(piobuf, hdr, hdrwords);
piobuf += hdrwords;
/* The common case is aligned and contained in one segment. */
if (likely(ss->num_sge == 1 && len <= ss->sge.length &&
!((unsigned long)ss->sge.vaddr & (sizeof(u32) - 1)))) {
u32 *addr = (u32 *) ss->sge.vaddr;
/* Update address before sending packet. */
update_sge(ss, len);
if (flush_wc) {
qib_pio_copy(piobuf, addr, dwords - 1);
/* must flush early everything before trigger word */
qib_flush_wc();
__raw_writel(addr[dwords - 1], piobuf + dwords - 1);
/* be sure trigger word is written */
qib_flush_wc();
} else
qib_pio_copy(piobuf, addr, dwords);
goto done;
}
copy_io(piobuf, ss, len, flush_wc);
done:
if (dd->flags & QIB_USE_SPCL_TRIG) {
u32 spcl_off = (pbufn >= dd->piobcnt2k) ? 2047 : 1023;
qib_flush_wc();
__raw_writel(0xaebecede, piobuf_orig + spcl_off);
}
qib_sendbuf_done(dd, pbufn);
if (qp->s_rdma_mr) {
rvt_put_mr(qp->s_rdma_mr);
qp->s_rdma_mr = NULL;
}
if (qp->s_wqe) {
spin_lock_irqsave(&qp->s_lock, flags);
qib_send_complete(qp, qp->s_wqe, IB_WC_SUCCESS);
spin_unlock_irqrestore(&qp->s_lock, flags);
} else if (qp->ibqp.qp_type == IB_QPT_RC) {
spin_lock_irqsave(&qp->s_lock, flags);
qib_rc_send_complete(qp, ibhdr);
spin_unlock_irqrestore(&qp->s_lock, flags);
}
return 0;
}
/**
* qib_verbs_send - send a packet
* @qp: the QP to send on
* @hdr: the packet header
* @hdrwords: the number of 32-bit words in the header
* @ss: the SGE to send
* @len: the length of the packet in bytes
*
* Return zero if packet is sent or queued OK.
* Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise.
*/
int qib_verbs_send(struct rvt_qp *qp, struct qib_ib_header *hdr,
u32 hdrwords, struct rvt_sge_state *ss, u32 len)
{
struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device);
u32 plen;
int ret;
u32 dwords = (len + 3) >> 2;
/*
* Calculate the send buffer trigger address.
* The +1 counts for the pbc control dword following the pbc length.
*/
plen = hdrwords + dwords + 1;
/*
* VL15 packets (IB_QPT_SMI) will always use PIO, so we
* can defer SDMA restart until link goes ACTIVE without
* worrying about just how we got there.
*/
if (qp->ibqp.qp_type == IB_QPT_SMI ||
!(dd->flags & QIB_HAS_SEND_DMA))
ret = qib_verbs_send_pio(qp, hdr, hdrwords, ss, len,
plen, dwords);
else
ret = qib_verbs_send_dma(qp, hdr, hdrwords, ss, len,
plen, dwords);
return ret;
}
int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
u64 *rwords, u64 *spkts, u64 *rpkts,
u64 *xmit_wait)
{
int ret;
struct qib_devdata *dd = ppd->dd;
if (!(dd->flags & QIB_PRESENT)) {
/* no hardware, freeze, etc. */
ret = -EINVAL;
goto bail;
}
*swords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDSEND);
*rwords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDRCV);
*spkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTSEND);
*rpkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTRCV);
*xmit_wait = dd->f_portcntr(ppd, QIBPORTCNTR_SENDSTALL);
ret = 0;
bail:
return ret;
}
/**
* qib_get_counters - get various chip counters
* @dd: the qlogic_ib device
* @cntrs: counters are placed here
*
* Return the counters needed by recv_pma_get_portcounters().
*/
int qib_get_counters(struct qib_pportdata *ppd,
struct qib_verbs_counters *cntrs)
{
int ret;
if (!(ppd->dd->flags & QIB_PRESENT)) {
/* no hardware, freeze, etc. */
ret = -EINVAL;
goto bail;
}
cntrs->symbol_error_counter =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBSYMBOLERR);
cntrs->link_error_recovery_counter =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKERRRECOV);
/*
* The link downed counter counts when the other side downs the
* connection. We add in the number of times we downed the link
* due to local link integrity errors to compensate.
*/
cntrs->link_downed_counter =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKDOWN);
cntrs->port_rcv_errors =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXDROPPKT) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVOVFL) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERR_RLEN) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_INVALIDRLEN) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLINK) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRICRC) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRVCRC) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLPCRC) +
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_BADFORMAT);
cntrs->port_rcv_errors +=
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXLOCALPHYERR);
cntrs->port_rcv_errors +=
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXVLERR);
cntrs->port_rcv_remphys_errors =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVEBP);
cntrs->port_xmit_discards =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_UNSUPVL);
cntrs->port_xmit_data = ppd->dd->f_portcntr(ppd,
QIBPORTCNTR_WORDSEND);
cntrs->port_rcv_data = ppd->dd->f_portcntr(ppd,
QIBPORTCNTR_WORDRCV);
cntrs->port_xmit_packets = ppd->dd->f_portcntr(ppd,
QIBPORTCNTR_PKTSEND);
cntrs->port_rcv_packets = ppd->dd->f_portcntr(ppd,
QIBPORTCNTR_PKTRCV);
cntrs->local_link_integrity_errors =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_LLI);
cntrs->excessive_buffer_overrun_errors =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_EXCESSBUFOVFL);
cntrs->vl15_dropped =
ppd->dd->f_portcntr(ppd, QIBPORTCNTR_VL15PKTDROP);
ret = 0;
bail:
return ret;
}
/**
* qib_ib_piobufavail - callback when a PIO buffer is available
* @dd: the device pointer
*
* This is called from qib_intr() at interrupt level when a PIO buffer is
* available after qib_verbs_send() returned an error that no buffers were
* available. Disable the interrupt if there are no more QPs waiting.
*/
void qib_ib_piobufavail(struct qib_devdata *dd)
{
struct qib_ibdev *dev = &dd->verbs_dev;
struct list_head *list;
struct rvt_qp *qps[5];
struct rvt_qp *qp;
unsigned long flags;
unsigned i, n;
struct qib_qp_priv *priv;
list = &dev->piowait;
n = 0;
/*
* Note: checking that the piowait list is empty and clearing
* the buffer available interrupt needs to be atomic or we
* could end up with QPs on the wait list with the interrupt
* disabled.
*/
spin_lock_irqsave(&dev->rdi.pending_lock, flags);
while (!list_empty(list)) {
if (n == ARRAY_SIZE(qps))
goto full;
priv = list_entry(list->next, struct qib_qp_priv, iowait);
qp = priv->owner;
list_del_init(&priv->iowait);
atomic_inc(&qp->refcount);
qps[n++] = qp;
}
dd->f_wantpiobuf_intr(dd, 0);
full:
spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
for (i = 0; i < n; i++) {
qp = qps[i];
spin_lock_irqsave(&qp->s_lock, flags);
if (qp->s_flags & RVT_S_WAIT_PIO) {
qp->s_flags &= ~RVT_S_WAIT_PIO;
qib_schedule_send(qp);
}
spin_unlock_irqrestore(&qp->s_lock, flags);
/* Notify qib_destroy_qp() if it is waiting. */
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
}
}
static int qib_query_port(struct rvt_dev_info *rdi, u8 port_num,
struct ib_port_attr *props)
{
struct qib_ibdev *ibdev = container_of(rdi, struct qib_ibdev, rdi);
struct qib_devdata *dd = dd_from_dev(ibdev);
struct qib_pportdata *ppd = &dd->pport[port_num - 1];
enum ib_mtu mtu;
u16 lid = ppd->lid;
props->lid = lid ? lid : be16_to_cpu(IB_LID_PERMISSIVE);
props->lmc = ppd->lmc;
props->state = dd->f_iblink_state(ppd->lastibcstat);
props->phys_state = dd->f_ibphys_portstate(ppd->lastibcstat);
props->gid_tbl_len = QIB_GUIDS_PER_PORT;
props->active_width = ppd->link_width_active;
/* See rate_show() */
props->active_speed = ppd->link_speed_active;
props->max_vl_num = qib_num_vls(ppd->vls_supported);
props->max_mtu = qib_ibmtu ? qib_ibmtu : IB_MTU_4096;
switch (ppd->ibmtu) {
case 4096:
mtu = IB_MTU_4096;
break;
case 2048:
mtu = IB_MTU_2048;
break;
case 1024:
mtu = IB_MTU_1024;
break;
case 512:
mtu = IB_MTU_512;
break;
case 256:
mtu = IB_MTU_256;
break;
default:
mtu = IB_MTU_2048;
}
props->active_mtu = mtu;
return 0;
}
static int qib_modify_device(struct ib_device *device,
int device_modify_mask,
struct ib_device_modify *device_modify)
{
struct qib_devdata *dd = dd_from_ibdev(device);
unsigned i;
int ret;
if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
IB_DEVICE_MODIFY_NODE_DESC)) {
ret = -EOPNOTSUPP;
goto bail;
}
if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
memcpy(device->node_desc, device_modify->node_desc, 64);
for (i = 0; i < dd->num_pports; i++) {
struct qib_ibport *ibp = &dd->pport[i].ibport_data;
qib_node_desc_chg(ibp);
}
}
if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
ib_qib_sys_image_guid =
cpu_to_be64(device_modify->sys_image_guid);
for (i = 0; i < dd->num_pports; i++) {
struct qib_ibport *ibp = &dd->pport[i].ibport_data;
qib_sys_guid_chg(ibp);
}
}
ret = 0;
bail:
return ret;
}
static int qib_shut_down_port(struct rvt_dev_info *rdi, u8 port_num)
{
struct qib_ibdev *ibdev = container_of(rdi, struct qib_ibdev, rdi);
struct qib_devdata *dd = dd_from_dev(ibdev);
struct qib_pportdata *ppd = &dd->pport[port_num - 1];
qib_set_linkstate(ppd, QIB_IB_LINKDOWN);
return 0;
}
static int qib_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
int guid_index, __be64 *guid)
{
struct qib_ibport *ibp = container_of(rvp, struct qib_ibport, rvp);
struct qib_pportdata *ppd = ppd_from_ibp(ibp);
if (guid_index == 0)
*guid = ppd->guid;
else if (guid_index < QIB_GUIDS_PER_PORT)
*guid = ibp->guids[guid_index - 1];
else
return -EINVAL;
return 0;
}
int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr)
{
if (ah_attr->sl > 15)
return -EINVAL;
return 0;
}
static void qib_notify_new_ah(struct ib_device *ibdev,
struct ib_ah_attr *ah_attr,
struct rvt_ah *ah)
{
struct qib_ibport *ibp;
struct qib_pportdata *ppd;
/*
* Do not trust reading anything from rvt_ah at this point as it is not
* done being setup. We can however modify things which we need to set.
*/
ibp = to_iport(ibdev, ah_attr->port_num);
ppd = ppd_from_ibp(ibp);
ah->vl = ibp->sl_to_vl[ah->attr.sl];
ah->log_pmtu = ilog2(ppd->ibmtu);
}
struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid)
{
struct ib_ah_attr attr;
struct ib_ah *ah = ERR_PTR(-EINVAL);
struct rvt_qp *qp0;
memset(&attr, 0, sizeof(attr));
attr.dlid = dlid;
attr.port_num = ppd_from_ibp(ibp)->port;
rcu_read_lock();
qp0 = rcu_dereference(ibp->rvp.qp[0]);
if (qp0)
ah = ib_create_ah(qp0->ibqp.pd, &attr);
rcu_read_unlock();
return ah;
}
/**
* qib_get_npkeys - return the size of the PKEY table for context 0
* @dd: the qlogic_ib device
*/
unsigned qib_get_npkeys(struct qib_devdata *dd)
{
return ARRAY_SIZE(dd->rcd[0]->pkeys);
}
/*
* Return the indexed PKEY from the port PKEY table.
* No need to validate rcd[ctxt]; the port is setup if we are here.
*/
unsigned qib_get_pkey(struct qib_ibport *ibp, unsigned index)
{
struct qib_pportdata *ppd = ppd_from_ibp(ibp);
struct qib_devdata *dd = ppd->dd;
unsigned ctxt = ppd->hw_pidx;
unsigned ret;
/* dd->rcd null if mini_init or some init failures */
if (!dd->rcd || index >= ARRAY_SIZE(dd->rcd[ctxt]->pkeys))
ret = 0;
else
ret = dd->rcd[ctxt]->pkeys[index];
return ret;
}
static void init_ibport(struct qib_pportdata *ppd)
{
struct qib_verbs_counters cntrs;
struct qib_ibport *ibp = &ppd->ibport_data;
spin_lock_init(&ibp->rvp.lock);
/* Set the prefix to the default value (see ch. 4.1.1) */
ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX;
ibp->rvp.sm_lid = be16_to_cpu(IB_LID_PERMISSIVE);
ibp->rvp.port_cap_flags = IB_PORT_SYS_IMAGE_GUID_SUP |
IB_PORT_CLIENT_REG_SUP | IB_PORT_SL_MAP_SUP |
IB_PORT_TRAP_SUP | IB_PORT_AUTO_MIGR_SUP |
IB_PORT_DR_NOTICE_SUP | IB_PORT_CAP_MASK_NOTICE_SUP |
IB_PORT_OTHER_LOCAL_CHANGES_SUP;
if (ppd->dd->flags & QIB_HAS_LINK_LATENCY)
ibp->rvp.port_cap_flags |= IB_PORT_LINK_LATENCY_SUP;
ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
/* Snapshot current HW counters to "clear" them. */
qib_get_counters(ppd, &cntrs);
ibp->z_symbol_error_counter = cntrs.symbol_error_counter;
ibp->z_link_error_recovery_counter =
cntrs.link_error_recovery_counter;
ibp->z_link_downed_counter = cntrs.link_downed_counter;
ibp->z_port_rcv_errors = cntrs.port_rcv_errors;
ibp->z_port_rcv_remphys_errors = cntrs.port_rcv_remphys_errors;
ibp->z_port_xmit_discards = cntrs.port_xmit_discards;
ibp->z_port_xmit_data = cntrs.port_xmit_data;
ibp->z_port_rcv_data = cntrs.port_rcv_data;
ibp->z_port_xmit_packets = cntrs.port_xmit_packets;
ibp->z_port_rcv_packets = cntrs.port_rcv_packets;
ibp->z_local_link_integrity_errors =
cntrs.local_link_integrity_errors;
ibp->z_excessive_buffer_overrun_errors =
cntrs.excessive_buffer_overrun_errors;
ibp->z_vl15_dropped = cntrs.vl15_dropped;
RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
}
/**
* qib_fill_device_attr - Fill in rvt dev info device attributes.
* @dd: the device data structure
*/
static void qib_fill_device_attr(struct qib_devdata *dd)
{
struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props));
rdi->dparms.props.max_pd = ib_qib_max_pds;
rdi->dparms.props.max_ah = ib_qib_max_ahs;
rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE;
rdi->dparms.props.page_size_cap = PAGE_SIZE;
rdi->dparms.props.vendor_id =
QIB_SRC_OUI_1 << 16 | QIB_SRC_OUI_2 << 8 | QIB_SRC_OUI_3;
rdi->dparms.props.vendor_part_id = dd->deviceid;
rdi->dparms.props.hw_ver = dd->minrev;
rdi->dparms.props.sys_image_guid = ib_qib_sys_image_guid;
rdi->dparms.props.max_mr_size = ~0ULL;
rdi->dparms.props.max_qp = ib_qib_max_qps;
rdi->dparms.props.max_qp_wr = ib_qib_max_qp_wrs;
rdi->dparms.props.max_sge = ib_qib_max_sges;
rdi->dparms.props.max_sge_rd = ib_qib_max_sges;
rdi->dparms.props.max_cq = ib_qib_max_cqs;
rdi->dparms.props.max_cqe = ib_qib_max_cqes;
rdi->dparms.props.max_ah = ib_qib_max_ahs;
rdi->dparms.props.max_mr = rdi->lkey_table.max;
rdi->dparms.props.max_fmr = rdi->lkey_table.max;
rdi->dparms.props.max_map_per_fmr = 32767;
rdi->dparms.props.max_qp_rd_atom = QIB_MAX_RDMA_ATOMIC;
rdi->dparms.props.max_qp_init_rd_atom = 255;
rdi->dparms.props.max_srq = ib_qib_max_srqs;
rdi->dparms.props.max_srq_wr = ib_qib_max_srq_wrs;
rdi->dparms.props.max_srq_sge = ib_qib_max_srq_sges;
rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB;
rdi->dparms.props.max_pkeys = qib_get_npkeys(dd);
rdi->dparms.props.max_mcast_grp = ib_qib_max_mcast_grps;
rdi->dparms.props.max_mcast_qp_attach = ib_qib_max_mcast_qp_attached;
rdi->dparms.props.max_total_mcast_qp_attach =
rdi->dparms.props.max_mcast_qp_attach *
rdi->dparms.props.max_mcast_grp;
/* post send table */
dd->verbs_dev.rdi.post_parms = qib_post_parms;
}
/**
* qib_register_ib_device - register our device with the infiniband core
* @dd: the device data structure
* Return the allocated qib_ibdev pointer or NULL on error.
*/
int qib_register_ib_device(struct qib_devdata *dd)
{
struct qib_ibdev *dev = &dd->verbs_dev;
struct ib_device *ibdev = &dev->rdi.ibdev;
struct qib_pportdata *ppd = dd->pport;
unsigned i, ctxt;
int ret;
get_random_bytes(&dev->qp_rnd, sizeof(dev->qp_rnd));
for (i = 0; i < dd->num_pports; i++)
init_ibport(ppd + i);
/* Only need to initialize non-zero fields. */
setup_timer(&dev->mem_timer, mem_timer, (unsigned long)dev);
qpt_mask = dd->qpn_mask;
INIT_LIST_HEAD(&dev->piowait);
INIT_LIST_HEAD(&dev->dmawait);
INIT_LIST_HEAD(&dev->txwait);
INIT_LIST_HEAD(&dev->memwait);
INIT_LIST_HEAD(&dev->txreq_free);
if (ppd->sdma_descq_cnt) {
dev->pio_hdrs = dma_alloc_coherent(&dd->pcidev->dev,
ppd->sdma_descq_cnt *
sizeof(struct qib_pio_header),
&dev->pio_hdrs_phys,
GFP_KERNEL);
if (!dev->pio_hdrs) {
ret = -ENOMEM;
goto err_hdrs;
}
}
for (i = 0; i < ppd->sdma_descq_cnt; i++) {
struct qib_verbs_txreq *tx;
tx = kzalloc(sizeof(*tx), GFP_KERNEL);
if (!tx) {
ret = -ENOMEM;
goto err_tx;
}
tx->hdr_inx = i;
list_add(&tx->txreq.list, &dev->txreq_free);
}
/*
* The system image GUID is supposed to be the same for all
* IB HCAs in a single system but since there can be other
* device types in the system, we can't be sure this is unique.
*/
if (!ib_qib_sys_image_guid)
ib_qib_sys_image_guid = ppd->guid;
strlcpy(ibdev->name, "qib%d", IB_DEVICE_NAME_MAX);
ibdev->owner = THIS_MODULE;
ibdev->node_guid = ppd->guid;
ibdev->phys_port_cnt = dd->num_pports;
ibdev->dma_device = &dd->pcidev->dev;
ibdev->modify_device = qib_modify_device;
ibdev->process_mad = qib_process_mad;
snprintf(ibdev->node_desc, sizeof(ibdev->node_desc),
"Intel Infiniband HCA %s", init_utsname()->nodename);
/*
* Fill in rvt info object.
*/
dd->verbs_dev.rdi.driver_f.port_callback = qib_create_port_files;
dd->verbs_dev.rdi.driver_f.get_card_name = qib_get_card_name;
dd->verbs_dev.rdi.driver_f.get_pci_dev = qib_get_pci_dev;
dd->verbs_dev.rdi.driver_f.check_ah = qib_check_ah;
dd->verbs_dev.rdi.driver_f.check_send_wqe = qib_check_send_wqe;
dd->verbs_dev.rdi.driver_f.notify_new_ah = qib_notify_new_ah;
dd->verbs_dev.rdi.driver_f.alloc_qpn = qib_alloc_qpn;
dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qib_qp_priv_alloc;
dd->verbs_dev.rdi.driver_f.qp_priv_free = qib_qp_priv_free;
dd->verbs_dev.rdi.driver_f.free_all_qps = qib_free_all_qps;
dd->verbs_dev.rdi.driver_f.notify_qp_reset = qib_notify_qp_reset;
dd->verbs_dev.rdi.driver_f.do_send = qib_do_send;
dd->verbs_dev.rdi.driver_f.schedule_send = qib_schedule_send;
dd->verbs_dev.rdi.driver_f.quiesce_qp = qib_quiesce_qp;
dd->verbs_dev.rdi.driver_f.stop_send_queue = qib_stop_send_queue;
dd->verbs_dev.rdi.driver_f.flush_qp_waiters = qib_flush_qp_waiters;
dd->verbs_dev.rdi.driver_f.notify_error_qp = qib_notify_error_qp;
dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = qib_mtu_to_path_mtu;
dd->verbs_dev.rdi.driver_f.mtu_from_qp = qib_mtu_from_qp;
dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = qib_get_pmtu_from_attr;
dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _qib_schedule_send;
dd->verbs_dev.rdi.driver_f.query_port_state = qib_query_port;
dd->verbs_dev.rdi.driver_f.shut_down_port = qib_shut_down_port;
dd->verbs_dev.rdi.driver_f.cap_mask_chg = qib_cap_mask_chg;
dd->verbs_dev.rdi.driver_f.notify_create_mad_agent =
qib_notify_create_mad_agent;
dd->verbs_dev.rdi.driver_f.notify_free_mad_agent =
qib_notify_free_mad_agent;
dd->verbs_dev.rdi.dparms.max_rdma_atomic = QIB_MAX_RDMA_ATOMIC;
dd->verbs_dev.rdi.driver_f.get_guid_be = qib_get_guid_be;
dd->verbs_dev.rdi.dparms.lkey_table_size = qib_lkey_table_size;
dd->verbs_dev.rdi.dparms.qp_table_size = ib_qib_qp_table_size;
dd->verbs_dev.rdi.dparms.qpn_start = 1;
dd->verbs_dev.rdi.dparms.qpn_res_start = QIB_KD_QP;
dd->verbs_dev.rdi.dparms.qpn_res_end = QIB_KD_QP; /* Reserve one QP */
dd->verbs_dev.rdi.dparms.qpn_inc = 1;
dd->verbs_dev.rdi.dparms.qos_shift = 1;
dd->verbs_dev.rdi.dparms.psn_mask = QIB_PSN_MASK;
dd->verbs_dev.rdi.dparms.psn_shift = QIB_PSN_SHIFT;
dd->verbs_dev.rdi.dparms.psn_modify_mask = QIB_PSN_MASK;
dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
dd->verbs_dev.rdi.dparms.npkeys = qib_get_npkeys(dd);
dd->verbs_dev.rdi.dparms.node = dd->assigned_node_id;
dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_IBA_IB;
dd->verbs_dev.rdi.dparms.max_mad_size = IB_MGMT_MAD_SIZE;
snprintf(dd->verbs_dev.rdi.dparms.cq_name,
sizeof(dd->verbs_dev.rdi.dparms.cq_name),
"qib_cq%d", dd->unit);
qib_fill_device_attr(dd);
ppd = dd->pport;
for (i = 0; i < dd->num_pports; i++, ppd++) {
ctxt = ppd->hw_pidx;
rvt_init_port(&dd->verbs_dev.rdi,
&ppd->ibport_data.rvp,
i,
dd->rcd[ctxt]->pkeys);
}
ret = rvt_register_device(&dd->verbs_dev.rdi);
if (ret)
goto err_tx;
ret = qib_verbs_register_sysfs(dd);
if (ret)
goto err_class;
return ret;
err_class:
rvt_unregister_device(&dd->verbs_dev.rdi);
err_tx:
while (!list_empty(&dev->txreq_free)) {
struct list_head *l = dev->txreq_free.next;
struct qib_verbs_txreq *tx;
list_del(l);
tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
kfree(tx);
}
if (ppd->sdma_descq_cnt)
dma_free_coherent(&dd->pcidev->dev,
ppd->sdma_descq_cnt *
sizeof(struct qib_pio_header),
dev->pio_hdrs, dev->pio_hdrs_phys);
err_hdrs:
qib_dev_err(dd, "cannot register verbs: %d!\n", -ret);
return ret;
}
void qib_unregister_ib_device(struct qib_devdata *dd)
{
struct qib_ibdev *dev = &dd->verbs_dev;
qib_verbs_unregister_sysfs(dd);
rvt_unregister_device(&dd->verbs_dev.rdi);
if (!list_empty(&dev->piowait))
qib_dev_err(dd, "piowait list not empty!\n");
if (!list_empty(&dev->dmawait))
qib_dev_err(dd, "dmawait list not empty!\n");
if (!list_empty(&dev->txwait))
qib_dev_err(dd, "txwait list not empty!\n");
if (!list_empty(&dev->memwait))
qib_dev_err(dd, "memwait list not empty!\n");
del_timer_sync(&dev->mem_timer);
while (!list_empty(&dev->txreq_free)) {
struct list_head *l = dev->txreq_free.next;
struct qib_verbs_txreq *tx;
list_del(l);
tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
kfree(tx);
}
if (dd->pport->sdma_descq_cnt)
dma_free_coherent(&dd->pcidev->dev,
dd->pport->sdma_descq_cnt *
sizeof(struct qib_pio_header),
dev->pio_hdrs, dev->pio_hdrs_phys);
}
/**
* _qib_schedule_send - schedule progress
* @qp - the qp
*
* This schedules progress w/o regard to the s_flags.
*
* It is only used in post send, which doesn't hold
* the s_lock.
*/
void _qib_schedule_send(struct rvt_qp *qp)
{
struct qib_ibport *ibp =
to_iport(qp->ibqp.device, qp->port_num);
struct qib_pportdata *ppd = ppd_from_ibp(ibp);
struct qib_qp_priv *priv = qp->priv;
queue_work(ppd->qib_wq, &priv->s_work);
}
/**
* qib_schedule_send - schedule progress
* @qp - the qp
*
* This schedules qp progress. The s_lock
* should be held.
*/
void qib_schedule_send(struct rvt_qp *qp)
{
if (qib_send_ok(qp))
_qib_schedule_send(qp);
}
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