/*
* Copyright (c) 2006, 2007 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/utsname.h>
#include "ipath_kernel.h"
#include "ipath_verbs.h"
#include "ipath_common.h"
static unsigned int ib_ipath_qp_table_size = 251;
module_param_named(qp_table_size, ib_ipath_qp_table_size, uint, S_IRUGO);
MODULE_PARM_DESC(qp_table_size, "QP table size");
unsigned int ib_ipath_lkey_table_size = 12;
module_param_named(lkey_table_size, ib_ipath_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_ipath_max_pds = 0xFFFF;
module_param_named(max_pds, ib_ipath_max_pds, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_pds,
"Maximum number of protection domains to support");
static unsigned int ib_ipath_max_ahs = 0xFFFF;
module_param_named(max_ahs, ib_ipath_max_ahs, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
unsigned int ib_ipath_max_cqes = 0x2FFFF;
module_param_named(max_cqes, ib_ipath_max_cqes, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_cqes,
"Maximum number of completion queue entries to support");
unsigned int ib_ipath_max_cqs = 0x1FFFF;
module_param_named(max_cqs, ib_ipath_max_cqs, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
unsigned int ib_ipath_max_qp_wrs = 0x3FFF;
module_param_named(max_qp_wrs, ib_ipath_max_qp_wrs, uint,
S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
unsigned int ib_ipath_max_qps = 16384;
module_param_named(max_qps, ib_ipath_max_qps, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
unsigned int ib_ipath_max_sges = 0x60;
module_param_named(max_sges, ib_ipath_max_sges, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
unsigned int ib_ipath_max_mcast_grps = 16384;
module_param_named(max_mcast_grps, ib_ipath_max_mcast_grps, uint,
S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_mcast_grps,
"Maximum number of multicast groups to support");
unsigned int ib_ipath_max_mcast_qp_attached = 16;
module_param_named(max_mcast_qp_attached, ib_ipath_max_mcast_qp_attached,
uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_mcast_qp_attached,
"Maximum number of attached QPs to support");
unsigned int ib_ipath_max_srqs = 1024;
module_param_named(max_srqs, ib_ipath_max_srqs, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
unsigned int ib_ipath_max_srq_sges = 128;
module_param_named(max_srq_sges, ib_ipath_max_srq_sges,
uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
unsigned int ib_ipath_max_srq_wrs = 0x1FFFF;
module_param_named(max_srq_wrs, ib_ipath_max_srq_wrs,
uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
static unsigned int ib_ipath_disable_sma;
module_param_named(disable_sma, ib_ipath_disable_sma, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(ib_ipath_disable_sma, "Disable the SMA");
const int ib_ipath_state_ops[IB_QPS_ERR + 1] = {
[IB_QPS_RESET] = 0,
[IB_QPS_INIT] = IPATH_POST_RECV_OK,
[IB_QPS_RTR] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
[IB_QPS_RTS] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
IPATH_POST_SEND_OK | IPATH_PROCESS_SEND_OK,
[IB_QPS_SQD] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
IPATH_POST_SEND_OK,
[IB_QPS_SQE] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
[IB_QPS_ERR] = 0,
};
struct ipath_ucontext {
struct ib_ucontext ibucontext;
};
static inline struct ipath_ucontext *to_iucontext(struct ib_ucontext
*ibucontext)
{
return container_of(ibucontext, struct ipath_ucontext, ibucontext);
}
/*
* Translate ib_wr_opcode into ib_wc_opcode.
*/
const enum ib_wc_opcode ib_ipath_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.
*/
static __be64 sys_image_guid;
/**
* ipath_copy_sge - copy data to SGE memory
* @ss: the SGE state
* @data: the data to copy
* @length: the length of the data
*/
void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length)
{
struct ipath_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 (--ss->num_sge)
*sge = *ss->sg_list++;
} else if (sge->length == 0 && sge->mr != NULL) {
if (++sge->n >= IPATH_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;
}
}
/**
* ipath_skip_sge - skip over SGE memory - XXX almost dup of prev func
* @ss: the SGE state
* @length: the number of bytes to skip
*/
void ipath_skip_sge(struct ipath_sge_state *ss, u32 length)
{
struct ipath_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 (--ss->num_sge)
*sge = *ss->sg_list++;
} else if (sge->length == 0 && sge->mr != NULL) {
if (++sge->n >= IPATH_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;
}
}
/**
* ipath_post_one_send - post one RC, UC, or UD send work request
* @qp: the QP to post on
* @wr: the work request to send
*/
static int ipath_post_one_send(struct ipath_qp *qp, struct ib_send_wr *wr)
{
struct ipath_swqe *wqe;
u32 next;
int i;
int j;
int acc;
int ret;
unsigned long flags;
spin_lock_irqsave(&qp->s_lock, flags);
/* Check that state is OK to post send. */
if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK))
goto bail_inval;
/* IB spec says that num_sge == 0 is OK. */
if (wr->num_sge > qp->s_max_sge)
goto bail_inval;
/*
* Don't allow RDMA reads or atomic operations on UC or
* undefined operations.
* Make sure buffer is large enough to hold the result for atomics.
*/
if (qp->ibqp.qp_type == IB_QPT_UC) {
if ((unsigned) wr->opcode >= IB_WR_RDMA_READ)
goto bail_inval;
} else if (qp->ibqp.qp_type == IB_QPT_UD) {
/* Check UD opcode */
if (wr->opcode != IB_WR_SEND &&
wr->opcode != IB_WR_SEND_WITH_IMM)
goto bail_inval;
/* Check UD destination address PD */
if (qp->ibqp.pd != wr->wr.ud.ah->pd)
goto bail_inval;
} else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD)
goto bail_inval;
else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP &&
(wr->num_sge == 0 ||
wr->sg_list[0].length < sizeof(u64) ||
wr->sg_list[0].addr & (sizeof(u64) - 1)))
goto bail_inval;
else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic)
goto bail_inval;
next = qp->s_head + 1;
if (next >= qp->s_size)
next = 0;
if (next == qp->s_last)
goto bail_inval;
wqe = get_swqe_ptr(qp, qp->s_head);
wqe->wr = *wr;
wqe->ssn = qp->s_ssn++;
wqe->length = 0;
if (wr->num_sge) {
acc = wr->opcode >= IB_WR_RDMA_READ ?
IB_ACCESS_LOCAL_WRITE : 0;
for (i = 0, j = 0; i < wr->num_sge; i++) {
u32 length = wr->sg_list[i].length;
int ok;
if (length == 0)
continue;
ok = ipath_lkey_ok(qp, &wqe->sg_list[j],
&wr->sg_list[i], acc);
if (!ok)
goto bail_inval;
wqe->length += length;
j++;
}
wqe->wr.num_sge = j;
}
if (qp->ibqp.qp_type == IB_QPT_UC ||
qp->ibqp.qp_type == IB_QPT_RC) {
if (wqe->length > 0x80000000U)
goto bail_inval;
} else if (wqe->length > to_idev(qp->ibqp.device)->dd->ipath_ibmtu)
goto bail_inval;
qp->s_head = next;
ret = 0;
goto bail;
bail_inval:
ret = -EINVAL;
bail:
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}
/**
* ipath_post_send - post a send on a QP
* @ibqp: the QP to post the send on
* @wr: the list of work requests to post
* @bad_wr: the first bad WR is put here
*
* This may be called from interrupt context.
*/
static int ipath_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
{
struct ipath_qp *qp = to_iqp(ibqp);
int err = 0;
for (; wr; wr = wr->next) {
err = ipath_post_one_send(qp, wr);
if (err) {
*bad_wr = wr;
goto bail;
}
}
/* Try to do the send work in the caller's context. */
ipath_do_send((unsigned long) qp);
bail:
return err;
}
/**
* ipath_post_receive - post a receive on a QP
* @ibqp: the QP to post the receive on
* @wr: the WR to post
* @bad_wr: the first bad WR is put here
*
* This may be called from interrupt context.
*/
static int ipath_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr)
{
struct ipath_qp *qp = to_iqp(ibqp);
struct ipath_rwq *wq = qp->r_rq.wq;
unsigned long flags;
int ret;
/* Check that state is OK to post receive. */
if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_RECV_OK) || !wq) {
*bad_wr = wr;
ret = -EINVAL;
goto bail;
}
for (; wr; wr = wr->next) {
struct ipath_rwqe *wqe;
u32 next;
int i;
if ((unsigned) wr->num_sge > qp->r_rq.max_sge) {
*bad_wr = wr;
ret = -ENOMEM;
goto bail;
}
spin_lock_irqsave(&qp->r_rq.lock, flags);
next = wq->head + 1;
if (next >= qp->r_rq.size)
next = 0;
if (next == wq->tail) {
spin_unlock_irqrestore(&qp->r_rq.lock, flags);
*bad_wr = wr;
ret = -ENOMEM;
goto bail;
}
wqe = get_rwqe_ptr(&qp->r_rq, wq->head);
wqe->wr_id = wr->wr_id;
wqe->num_sge = wr->num_sge;
for (i = 0; i < wr->num_sge; i++)
wqe->sg_list[i] = wr->sg_list[i];
/* Make sure queue entry is written before the head index. */
smp_wmb();
wq->head = next;
spin_unlock_irqrestore(&qp->r_rq.lock, flags);
}
ret = 0;
bail:
return ret;
}
/**
* ipath_qp_rcv - processing an incoming packet on a QP
* @dev: the device the packet came on
* @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 ipath_ib_rcv() to process an incoming packet
* for the given QP.
* Called at interrupt level.
*/
static void ipath_qp_rcv(struct ipath_ibdev *dev,
struct ipath_ib_header *hdr, int has_grh,
void *data, u32 tlen, struct ipath_qp *qp)
{
/* Check for valid receive state. */
if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) {
dev->n_pkt_drops++;
return;
}
switch (qp->ibqp.qp_type) {
case IB_QPT_SMI:
case IB_QPT_GSI:
if (ib_ipath_disable_sma)
break;
/* FALLTHROUGH */
case IB_QPT_UD:
ipath_ud_rcv(dev, hdr, has_grh, data, tlen, qp);
break;
case IB_QPT_RC:
ipath_rc_rcv(dev, hdr, has_grh, data, tlen, qp);
break;
case IB_QPT_UC:
ipath_uc_rcv(dev, hdr, has_grh, data, tlen, qp);
break;
default:
break;
}
}
/**
* ipath_ib_rcv - process an incoming packet
* @arg: the device pointer
* @rhdr: the header of the packet
* @data: the packet data
* @tlen: the packet length
*
* This is called from ipath_kreceive() to process an incoming packet at
* interrupt level. Tlen is the length of the header + data + CRC in bytes.
*/
void ipath_ib_rcv(struct ipath_ibdev *dev, void *rhdr, void *data,
u32 tlen)
{
struct ipath_ib_header *hdr = rhdr;
struct ipath_other_headers *ohdr;
struct ipath_qp *qp;
u32 qp_num;
int lnh;
u8 opcode;
u16 lid;
if (unlikely(dev == NULL))
goto bail;
if (unlikely(tlen < 24)) { /* LRH+BTH+CRC */
dev->rcv_errors++;
goto bail;
}
/* Check for a valid destination LID (see ch. 7.11.1). */
lid = be16_to_cpu(hdr->lrh[1]);
if (lid < IPATH_MULTICAST_LID_BASE) {
lid &= ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
if (unlikely(lid != dev->dd->ipath_lid)) {
dev->rcv_errors++;
goto bail;
}
}
/* Check for GRH */
lnh = be16_to_cpu(hdr->lrh[0]) & 3;
if (lnh == IPATH_LRH_BTH)
ohdr = &hdr->u.oth;
else if (lnh == IPATH_LRH_GRH)
ohdr = &hdr->u.l.oth;
else {
dev->rcv_errors++;
goto bail;
}
opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
dev->opstats[opcode].n_bytes += tlen;
dev->opstats[opcode].n_packets++;
/* Get the destination QP number. */
qp_num = be32_to_cpu(ohdr->bth[1]) & IPATH_QPN_MASK;
if (qp_num == IPATH_MULTICAST_QPN) {
struct ipath_mcast *mcast;
struct ipath_mcast_qp *p;
if (lnh != IPATH_LRH_GRH) {
dev->n_pkt_drops++;
goto bail;
}
mcast = ipath_mcast_find(&hdr->u.l.grh.dgid);
if (mcast == NULL) {
dev->n_pkt_drops++;
goto bail;
}
dev->n_multicast_rcv++;
list_for_each_entry_rcu(p, &mcast->qp_list, list)
ipath_qp_rcv(dev, hdr, 1, data, tlen, p->qp);
/*
* Notify ipath_multicast_detach() if it is waiting for us
* to finish.
*/
if (atomic_dec_return(&mcast->refcount) <= 1)
wake_up(&mcast->wait);
} else {
qp = ipath_lookup_qpn(&dev->qp_table, qp_num);
if (qp) {
dev->n_unicast_rcv++;
ipath_qp_rcv(dev, hdr, lnh == IPATH_LRH_GRH, data,
tlen, qp);
/*
* Notify ipath_destroy_qp() if it is waiting
* for us to finish.
*/
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
} else
dev->n_pkt_drops++;
}
bail:;
}
/**
* ipath_ib_timer - verbs timer
* @arg: the device pointer
*
* This is called from ipath_do_rcv_timer() at interrupt level to check for
* QPs which need retransmits and to collect performance numbers.
*/
static void ipath_ib_timer(struct ipath_ibdev *dev)
{
struct ipath_qp *resend = NULL;
struct list_head *last;
struct ipath_qp *qp;
unsigned long flags;
if (dev == NULL)
return;
spin_lock_irqsave(&dev->pending_lock, flags);
/* Start filling the next pending queue. */
if (++dev->pending_index >= ARRAY_SIZE(dev->pending))
dev->pending_index = 0;
/* Save any requests still in the new queue, they have timed out. */
last = &dev->pending[dev->pending_index];
while (!list_empty(last)) {
qp = list_entry(last->next, struct ipath_qp, timerwait);
list_del_init(&qp->timerwait);
qp->timer_next = resend;
resend = qp;
atomic_inc(&qp->refcount);
}
last = &dev->rnrwait;
if (!list_empty(last)) {
qp = list_entry(last->next, struct ipath_qp, timerwait);
if (--qp->s_rnr_timeout == 0) {
do {
list_del_init(&qp->timerwait);
tasklet_hi_schedule(&qp->s_task);
if (list_empty(last))
break;
qp = list_entry(last->next, struct ipath_qp,
timerwait);
} while (qp->s_rnr_timeout == 0);
}
}
/*
* We should only be in the started state if pma_sample_start != 0
*/
if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED &&
--dev->pma_sample_start == 0) {
dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
ipath_snapshot_counters(dev->dd, &dev->ipath_sword,
&dev->ipath_rword,
&dev->ipath_spkts,
&dev->ipath_rpkts,
&dev->ipath_xmit_wait);
}
if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) {
if (dev->pma_sample_interval == 0) {
u64 ta, tb, tc, td, te;
dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
ipath_snapshot_counters(dev->dd, &ta, &tb,
&tc, &td, &te);
dev->ipath_sword = ta - dev->ipath_sword;
dev->ipath_rword = tb - dev->ipath_rword;
dev->ipath_spkts = tc - dev->ipath_spkts;
dev->ipath_rpkts = td - dev->ipath_rpkts;
dev->ipath_xmit_wait = te - dev->ipath_xmit_wait;
}
else
dev->pma_sample_interval--;
}
spin_unlock_irqrestore(&dev->pending_lock, flags);
/* XXX What if timer fires again while this is running? */
for (qp = resend; qp != NULL; qp = qp->timer_next) {
struct ib_wc wc;
spin_lock_irqsave(&qp->s_lock, flags);
if (qp->s_last != qp->s_tail && qp->state == IB_QPS_RTS) {
dev->n_timeouts++;
ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
}
spin_unlock_irqrestore(&qp->s_lock, flags);
/* Notify ipath_destroy_qp() if it is waiting. */
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
}
}
static void update_sge(struct ipath_sge_state *ss, u32 length)
{
struct ipath_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 != NULL) {
if (++sge->n >= IPATH_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 ipath_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;
__iowrite32_copy(piobuf, ss->sge.vaddr, w - 1);
piobuf += w - 1;
last = ((u32 *) ss->sge.vaddr)[w - 1];
break;
} else {
u32 w = len >> 2;
__iowrite32_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 */
ipath_flush_wc();
__raw_writel(last, piobuf);
/* be sure trigger word is written */
ipath_flush_wc();
} else
__raw_writel(last, piobuf);
}
static int ipath_verbs_send_pio(struct ipath_qp *qp, u32 *hdr, u32 hdrwords,
struct ipath_sge_state *ss, u32 len,
u32 plen, u32 dwords)
{
struct ipath_devdata *dd = to_idev(qp->ibqp.device)->dd;
u32 __iomem *piobuf;
unsigned flush_wc;
int ret;
piobuf = ipath_getpiobuf(dd, NULL);
if (unlikely(piobuf == NULL)) {
ret = -EBUSY;
goto bail;
}
/*
* Write len to control qword, no flags.
* We have to flush after the PBC for correctness on some cpus
* or WC buffer can be written out of order.
*/
writeq(plen, piobuf);
piobuf += 2;
flush_wc = dd->ipath_flags & IPATH_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) {
ipath_flush_wc();
__iowrite32_copy(piobuf, hdr, hdrwords - 1);
ipath_flush_wc();
__raw_writel(hdr[hdrwords - 1], piobuf + hdrwords - 1);
ipath_flush_wc();
} else
__iowrite32_copy(piobuf, hdr, hdrwords);
goto done;
}
if (flush_wc)
ipath_flush_wc();
__iowrite32_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) {
__iowrite32_copy(piobuf, addr, dwords - 1);
/* must flush early everything before trigger word */
ipath_flush_wc();
__raw_writel(addr[dwords - 1], piobuf + dwords - 1);
/* be sure trigger word is written */
ipath_flush_wc();
} else
__iowrite32_copy(piobuf, addr, dwords);
goto done;
}
copy_io(piobuf, ss, len, flush_wc);
done:
if (qp->s_wqe)
ipath_send_complete(qp, qp->s_wqe, IB_WC_SUCCESS);
ret = 0;
bail:
return ret;
}
/**
* ipath_verbs_send - send a packet
* @qp: the QP to send on
* @hdr: the packet header
* @hdrwords: the number of words in the header
* @ss: the SGE to send
* @len: the length of the packet in bytes
*/
int ipath_verbs_send(struct ipath_qp *qp, struct ipath_ib_header *hdr,
u32 hdrwords, struct ipath_sge_state *ss, u32 len)
{
u32 plen;
int ret;
u32 dwords = (len + 3) >> 2;
/* +1 is for the qword padding of pbc */
plen = hdrwords + dwords + 1;
ret = ipath_verbs_send_pio(qp, (u32 *) hdr, hdrwords,
ss, len, plen, dwords);
return ret;
}
int ipath_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
u64 *rwords, u64 *spkts, u64 *rpkts,
u64 *xmit_wait)
{
int ret;
if (!(dd->ipath_flags & IPATH_INITTED)) {
/* no hardware, freeze, etc. */
ret = -EINVAL;
goto bail;
}
*swords = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt);
*rwords = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
*spkts = ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
*rpkts = ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
*xmit_wait = ipath_snap_cntr(dd, dd->ipath_cregs->cr_sendstallcnt);
ret = 0;
bail:
return ret;
}
/**
* ipath_get_counters - get various chip counters
* @dd: the infinipath device
* @cntrs: counters are placed here
*
* Return the counters needed by recv_pma_get_portcounters().
*/
int ipath_get_counters(struct ipath_devdata *dd,
struct ipath_verbs_counters *cntrs)
{
struct ipath_cregs const *crp = dd->ipath_cregs;
int ret;
if (!(dd->ipath_flags & IPATH_INITTED)) {
/* no hardware, freeze, etc. */
ret = -EINVAL;
goto bail;
}
cntrs->symbol_error_counter =
ipath_snap_cntr(dd, crp->cr_ibsymbolerrcnt);
cntrs->link_error_recovery_counter =
ipath_snap_cntr(dd, crp->cr_iblinkerrrecovcnt);
/*
* 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 =
ipath_snap_cntr(dd, crp->cr_iblinkdowncnt);
cntrs->port_rcv_errors =
ipath_snap_cntr(dd, crp->cr_rxdroppktcnt) +
ipath_snap_cntr(dd, crp->cr_rcvovflcnt) +
ipath_snap_cntr(dd, crp->cr_portovflcnt) +
ipath_snap_cntr(dd, crp->cr_err_rlencnt) +
ipath_snap_cntr(dd, crp->cr_invalidrlencnt) +
ipath_snap_cntr(dd, crp->cr_errlinkcnt) +
ipath_snap_cntr(dd, crp->cr_erricrccnt) +
ipath_snap_cntr(dd, crp->cr_errvcrccnt) +
ipath_snap_cntr(dd, crp->cr_errlpcrccnt) +
ipath_snap_cntr(dd, crp->cr_badformatcnt) +
dd->ipath_rxfc_unsupvl_errs;
cntrs->port_rcv_remphys_errors =
ipath_snap_cntr(dd, crp->cr_rcvebpcnt);
cntrs->port_xmit_discards = ipath_snap_cntr(dd, crp->cr_unsupvlcnt);
cntrs->port_xmit_data = ipath_snap_cntr(dd, crp->cr_wordsendcnt);
cntrs->port_rcv_data = ipath_snap_cntr(dd, crp->cr_wordrcvcnt);
cntrs->port_xmit_packets = ipath_snap_cntr(dd, crp->cr_pktsendcnt);
cntrs->port_rcv_packets = ipath_snap_cntr(dd, crp->cr_pktrcvcnt);
cntrs->local_link_integrity_errors =
(dd->ipath_flags & IPATH_GPIO_ERRINTRS) ?
dd->ipath_lli_errs : dd->ipath_lli_errors;
cntrs->excessive_buffer_overrun_errors = dd->ipath_overrun_thresh_errs;
ret = 0;
bail:
return ret;
}
/**
* ipath_ib_piobufavail - callback when a PIO buffer is available
* @arg: the device pointer
*
* This is called from ipath_intr() at interrupt level when a PIO buffer is
* available after ipath_verbs_send() returned an error that no buffers were
* available. Return 1 if we consumed all the PIO buffers and we still have
* QPs waiting for buffers (for now, just do a tasklet_hi_schedule and
* return zero).
*/
int ipath_ib_piobufavail(struct ipath_ibdev *dev)
{
struct ipath_qp *qp;
unsigned long flags;
if (dev == NULL)
goto bail;
spin_lock_irqsave(&dev->pending_lock, flags);
while (!list_empty(&dev->piowait)) {
qp = list_entry(dev->piowait.next, struct ipath_qp,
piowait);
list_del_init(&qp->piowait);
clear_bit(IPATH_S_BUSY, &qp->s_busy);
tasklet_hi_schedule(&qp->s_task);
}
spin_unlock_irqrestore(&dev->pending_lock, flags);
bail:
return 0;
}
static int ipath_query_device(struct ib_device *ibdev,
struct ib_device_attr *props)
{
struct ipath_ibdev *dev = to_idev(ibdev);
memset(props, 0, sizeof(*props));
props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
IB_DEVICE_SYS_IMAGE_GUID;
props->page_size_cap = PAGE_SIZE;
props->vendor_id = dev->dd->ipath_vendorid;
props->vendor_part_id = dev->dd->ipath_deviceid;
props->hw_ver = dev->dd->ipath_pcirev;
props->sys_image_guid = dev->sys_image_guid;
props->max_mr_size = ~0ull;
props->max_qp = ib_ipath_max_qps;
props->max_qp_wr = ib_ipath_max_qp_wrs;
props->max_sge = ib_ipath_max_sges;
props->max_cq = ib_ipath_max_cqs;
props->max_ah = ib_ipath_max_ahs;
props->max_cqe = ib_ipath_max_cqes;
props->max_mr = dev->lk_table.max;
props->max_fmr = dev->lk_table.max;
props->max_map_per_fmr = 32767;
props->max_pd = ib_ipath_max_pds;
props->max_qp_rd_atom = IPATH_MAX_RDMA_ATOMIC;
props->max_qp_init_rd_atom = 255;
/* props->max_res_rd_atom */
props->max_srq = ib_ipath_max_srqs;
props->max_srq_wr = ib_ipath_max_srq_wrs;
props->max_srq_sge = ib_ipath_max_srq_sges;
/* props->local_ca_ack_delay */
props->atomic_cap = IB_ATOMIC_GLOB;
props->max_pkeys = ipath_get_npkeys(dev->dd);
props->max_mcast_grp = ib_ipath_max_mcast_grps;
props->max_mcast_qp_attach = ib_ipath_max_mcast_qp_attached;
props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
props->max_mcast_grp;
return 0;
}
const u8 ipath_cvt_physportstate[16] = {
[INFINIPATH_IBCS_LT_STATE_DISABLED] = 3,
[INFINIPATH_IBCS_LT_STATE_LINKUP] = 5,
[INFINIPATH_IBCS_LT_STATE_POLLACTIVE] = 2,
[INFINIPATH_IBCS_LT_STATE_POLLQUIET] = 2,
[INFINIPATH_IBCS_LT_STATE_SLEEPDELAY] = 1,
[INFINIPATH_IBCS_LT_STATE_SLEEPQUIET] = 1,
[INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE] = 4,
[INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG] = 4,
[INFINIPATH_IBCS_LT_STATE_CFGWAITRMT] = 4,
[INFINIPATH_IBCS_LT_STATE_CFGIDLE] = 4,
[INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN] = 6,
[INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT] = 6,
[INFINIPATH_IBCS_LT_STATE_RECOVERIDLE] = 6,
};
u32 ipath_get_cr_errpkey(struct ipath_devdata *dd)
{
return ipath_read_creg32(dd, dd->ipath_cregs->cr_errpkey);
}
static int ipath_query_port(struct ib_device *ibdev,
u8 port, struct ib_port_attr *props)
{
struct ipath_ibdev *dev = to_idev(ibdev);
struct ipath_devdata *dd = dev->dd;
enum ib_mtu mtu;
u16 lid = dd->ipath_lid;
u64 ibcstat;
memset(props, 0, sizeof(*props));
props->lid = lid ? lid : __constant_be16_to_cpu(IB_LID_PERMISSIVE);
props->lmc = dev->mkeyprot_resv_lmc & 7;
props->sm_lid = dev->sm_lid;
props->sm_sl = dev->sm_sl;
ibcstat = dd->ipath_lastibcstat;
props->state = ((ibcstat >> 4) & 0x3) + 1;
/* See phys_state_show() */
props->phys_state = ipath_cvt_physportstate[
dd->ipath_lastibcstat & 0xf];
props->port_cap_flags = dev->port_cap_flags;
props->gid_tbl_len = 1;
props->max_msg_sz = 0x80000000;
props->pkey_tbl_len = ipath_get_npkeys(dd);
props->bad_pkey_cntr = ipath_get_cr_errpkey(dd) -
dev->z_pkey_violations;
props->qkey_viol_cntr = dev->qkey_violations;
props->active_width = IB_WIDTH_4X;
/* See rate_show() */
props->active_speed = 1; /* Regular 10Mbs speed. */
props->max_vl_num = 1; /* VLCap = VL0 */
props->init_type_reply = 0;
/*
* Note: the chip supports a maximum MTU of 4096, but the driver
* hasn't implemented this feature yet, so set the maximum value
* to 2048.
*/
props->max_mtu = IB_MTU_2048;
switch (dd->ipath_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;
props->subnet_timeout = dev->subnet_timeout;
return 0;
}
static int ipath_modify_device(struct ib_device *device,
int device_modify_mask,
struct ib_device_modify *device_modify)
{
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);
if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
to_idev(device)->sys_image_guid =
cpu_to_be64(device_modify->sys_image_guid);
ret = 0;
bail:
return ret;
}
static int ipath_modify_port(struct ib_device *ibdev,
u8 port, int port_modify_mask,
struct ib_port_modify *props)
{
struct ipath_ibdev *dev = to_idev(ibdev);
dev->port_cap_flags |= props->set_port_cap_mask;
dev->port_cap_flags &= ~props->clr_port_cap_mask;
if (port_modify_mask & IB_PORT_SHUTDOWN)
ipath_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
dev->qkey_violations = 0;
return 0;
}
static int ipath_query_gid(struct ib_device *ibdev, u8 port,
int index, union ib_gid *gid)
{
struct ipath_ibdev *dev = to_idev(ibdev);
int ret;
if (index >= 1) {
ret = -EINVAL;
goto bail;
}
gid->global.subnet_prefix = dev->gid_prefix;
gid->global.interface_id = dev->dd->ipath_guid;
ret = 0;
bail:
return ret;
}
static struct ib_pd *ipath_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct ipath_ibdev *dev = to_idev(ibdev);
struct ipath_pd *pd;
struct ib_pd *ret;
/*
* This is actually totally arbitrary. Some correctness tests
* assume there's a maximum number of PDs that can be allocated.
* We don't actually have this limit, but we fail the test if
* we allow allocations of more than we report for this value.
*/
pd = kmalloc(sizeof *pd, GFP_KERNEL);
if (!pd) {
ret = ERR_PTR(-ENOMEM);
goto bail;
}
spin_lock(&dev->n_pds_lock);
if (dev->n_pds_allocated == ib_ipath_max_pds) {
spin_unlock(&dev->n_pds_lock);
kfree(pd);
ret = ERR_PTR(-ENOMEM);
goto bail;
}
dev->n_pds_allocated++;
spin_unlock(&dev->n_pds_lock);
/* ib_alloc_pd() will initialize pd->ibpd. */
pd->user = udata != NULL;
ret = &pd->ibpd;
bail:
return ret;
}
static int ipath_dealloc_pd(struct ib_pd *ibpd)
{
struct ipath_pd *pd = to_ipd(ibpd);
struct ipath_ibdev *dev = to_idev(ibpd->device);
spin_lock(&dev->n_pds_lock);
dev->n_pds_allocated--;
spin_unlock(&dev->n_pds_lock);
kfree(pd);
return 0;
}
/**
* ipath_create_ah - create an address handle
* @pd: the protection domain
* @ah_attr: the attributes of the AH
*
* This may be called from interrupt context.
*/
static struct ib_ah *ipath_create_ah(struct ib_pd *pd,
struct ib_ah_attr *ah_attr)
{
struct ipath_ah *ah;
struct ib_ah *ret;
struct ipath_ibdev *dev = to_idev(pd->device);
unsigned long flags;
/* A multicast address requires a GRH (see ch. 8.4.1). */
if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE &&
ah_attr->dlid != IPATH_PERMISSIVE_LID &&
!(ah_attr->ah_flags & IB_AH_GRH)) {
ret = ERR_PTR(-EINVAL);
goto bail;
}
if (ah_attr->dlid == 0) {
ret = ERR_PTR(-EINVAL);
goto bail;
}
if (ah_attr->port_num < 1 ||
ah_attr->port_num > pd->device->phys_port_cnt) {
ret = ERR_PTR(-EINVAL);
goto bail;
}
ah = kmalloc(sizeof *ah, GFP_ATOMIC);
if (!ah) {
ret = ERR_PTR(-ENOMEM);
goto bail;
}
spin_lock_irqsave(&dev->n_ahs_lock, flags);
if (dev->n_ahs_allocated == ib_ipath_max_ahs) {
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
kfree(ah);
ret = ERR_PTR(-ENOMEM);
goto bail;
}
dev->n_ahs_allocated++;
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
/* ib_create_ah() will initialize ah->ibah. */
ah->attr = *ah_attr;
ret = &ah->ibah;
bail:
return ret;
}
/**
* ipath_destroy_ah - destroy an address handle
* @ibah: the AH to destroy
*
* This may be called from interrupt context.
*/
static int ipath_destroy_ah(struct ib_ah *ibah)
{
struct ipath_ibdev *dev = to_idev(ibah->device);
struct ipath_ah *ah = to_iah(ibah);
unsigned long flags;
spin_lock_irqsave(&dev->n_ahs_lock, flags);
dev->n_ahs_allocated--;
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
kfree(ah);
return 0;
}
static int ipath_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
struct ipath_ah *ah = to_iah(ibah);
*ah_attr = ah->attr;
return 0;
}
/**
* ipath_get_npkeys - return the size of the PKEY table for port 0
* @dd: the infinipath device
*/
unsigned ipath_get_npkeys(struct ipath_devdata *dd)
{
return ARRAY_SIZE(dd->ipath_pd[0]->port_pkeys);
}
/**
* ipath_get_pkey - return the indexed PKEY from the port 0 PKEY table
* @dd: the infinipath device
* @index: the PKEY index
*/
unsigned ipath_get_pkey(struct ipath_devdata *dd, unsigned index)
{
unsigned ret;
if (index >= ARRAY_SIZE(dd->ipath_pd[0]->port_pkeys))
ret = 0;
else
ret = dd->ipath_pd[0]->port_pkeys[index];
return ret;
}
static int ipath_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
u16 *pkey)
{
struct ipath_ibdev *dev = to_idev(ibdev);
int ret;
if (index >= ipath_get_npkeys(dev->dd)) {
ret = -EINVAL;
goto bail;
}
*pkey = ipath_get_pkey(dev->dd, index);
ret = 0;
bail:
return ret;
}
/**
* ipath_alloc_ucontext - allocate a ucontest
* @ibdev: the infiniband device
* @udata: not used by the InfiniPath driver
*/
static struct ib_ucontext *ipath_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
struct ipath_ucontext *context;
struct ib_ucontext *ret;
context = kmalloc(sizeof *context, GFP_KERNEL);
if (!context) {
ret = ERR_PTR(-ENOMEM);
goto bail;
}
ret = &context->ibucontext;
bail:
return ret;
}
static int ipath_dealloc_ucontext(struct ib_ucontext *context)
{
kfree(to_iucontext(context));
return 0;
}
static int ipath_verbs_register_sysfs(struct ib_device *dev);
static void __verbs_timer(unsigned long arg)
{
struct ipath_devdata *dd = (struct ipath_devdata *) arg;
/* Handle verbs layer timeouts. */
ipath_ib_timer(dd->verbs_dev);
mod_timer(&dd->verbs_timer, jiffies + 1);
}
static int enable_timer(struct ipath_devdata *dd)
{
/*
* Early chips had a design flaw where the chip and kernel idea
* of the tail register don't always agree, and therefore we won't
* get an interrupt on the next packet received.
* If the board supports per packet receive interrupts, use it.
* Otherwise, the timer function periodically checks for packets
* to cover this case.
* Either way, the timer is needed for verbs layer related
* processing.
*/
if (dd->ipath_flags & IPATH_GPIO_INTR) {
ipath_write_kreg(dd, dd->ipath_kregs->kr_debugportselect,
0x2074076542310ULL);
/* Enable GPIO bit 2 interrupt */
dd->ipath_gpio_mask |= (u64) (1 << IPATH_GPIO_PORT0_BIT);
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
dd->ipath_gpio_mask);
}
init_timer(&dd->verbs_timer);
dd->verbs_timer.function = __verbs_timer;
dd->verbs_timer.data = (unsigned long)dd;
dd->verbs_timer.expires = jiffies + 1;
add_timer(&dd->verbs_timer);
return 0;
}
static int disable_timer(struct ipath_devdata *dd)
{
/* Disable GPIO bit 2 interrupt */
if (dd->ipath_flags & IPATH_GPIO_INTR) {
/* Disable GPIO bit 2 interrupt */
dd->ipath_gpio_mask &= ~((u64) (1 << IPATH_GPIO_PORT0_BIT));
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
dd->ipath_gpio_mask);
/*
* We might want to undo changes to debugportselect,
* but how?
*/
}
del_timer_sync(&dd->verbs_timer);
return 0;
}
/**
* ipath_register_ib_device - register our device with the infiniband core
* @dd: the device data structure
* Return the allocated ipath_ibdev pointer or NULL on error.
*/
int ipath_register_ib_device(struct ipath_devdata *dd)
{
struct ipath_verbs_counters cntrs;
struct ipath_ibdev *idev;
struct ib_device *dev;
int ret;
idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev);
if (idev == NULL) {
ret = -ENOMEM;
goto bail;
}
dev = &idev->ibdev;
/* Only need to initialize non-zero fields. */
spin_lock_init(&idev->n_pds_lock);
spin_lock_init(&idev->n_ahs_lock);
spin_lock_init(&idev->n_cqs_lock);
spin_lock_init(&idev->n_qps_lock);
spin_lock_init(&idev->n_srqs_lock);
spin_lock_init(&idev->n_mcast_grps_lock);
spin_lock_init(&idev->qp_table.lock);
spin_lock_init(&idev->lk_table.lock);
idev->sm_lid = __constant_be16_to_cpu(IB_LID_PERMISSIVE);
/* Set the prefix to the default value (see ch. 4.1.1) */
idev->gid_prefix = __constant_cpu_to_be64(0xfe80000000000000ULL);
ret = ipath_init_qp_table(idev, ib_ipath_qp_table_size);
if (ret)
goto err_qp;
/*
* The top ib_ipath_lkey_table_size bits are used to index the
* table. The lower 8 bits can be owned by the user (copied from
* the LKEY). The remaining bits act as a generation number or tag.
*/
idev->lk_table.max = 1 << ib_ipath_lkey_table_size;
idev->lk_table.table = kzalloc(idev->lk_table.max *
sizeof(*idev->lk_table.table),
GFP_KERNEL);
if (idev->lk_table.table == NULL) {
ret = -ENOMEM;
goto err_lk;
}
INIT_LIST_HEAD(&idev->pending_mmaps);
spin_lock_init(&idev->pending_lock);
idev->mmap_offset = PAGE_SIZE;
spin_lock_init(&idev->mmap_offset_lock);
INIT_LIST_HEAD(&idev->pending[0]);
INIT_LIST_HEAD(&idev->pending[1]);
INIT_LIST_HEAD(&idev->pending[2]);
INIT_LIST_HEAD(&idev->piowait);
INIT_LIST_HEAD(&idev->rnrwait);
idev->pending_index = 0;
idev->port_cap_flags =
IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP;
idev->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
idev->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
idev->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
idev->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
idev->pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
idev->link_width_enabled = 3; /* 1x or 4x */
/* Snapshot current HW counters to "clear" them. */
ipath_get_counters(dd, &cntrs);
idev->z_symbol_error_counter = cntrs.symbol_error_counter;
idev->z_link_error_recovery_counter =
cntrs.link_error_recovery_counter;
idev->z_link_downed_counter = cntrs.link_downed_counter;
idev->z_port_rcv_errors = cntrs.port_rcv_errors;
idev->z_port_rcv_remphys_errors =
cntrs.port_rcv_remphys_errors;
idev->z_port_xmit_discards = cntrs.port_xmit_discards;
idev->z_port_xmit_data = cntrs.port_xmit_data;
idev->z_port_rcv_data = cntrs.port_rcv_data;
idev->z_port_xmit_packets = cntrs.port_xmit_packets;
idev->z_port_rcv_packets = cntrs.port_rcv_packets;
idev->z_local_link_integrity_errors =
cntrs.local_link_integrity_errors;
idev->z_excessive_buffer_overrun_errors =
cntrs.excessive_buffer_overrun_errors;
/*
* 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 (!sys_image_guid)
sys_image_guid = dd->ipath_guid;
idev->sys_image_guid = sys_image_guid;
idev->ib_unit = dd->ipath_unit;
idev->dd = dd;
strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX);
dev->owner = THIS_MODULE;
dev->node_guid = dd->ipath_guid;
dev->uverbs_abi_ver = IPATH_UVERBS_ABI_VERSION;
dev->uverbs_cmd_mask =
(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
(1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
(1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_CREATE_AH) |
(1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
(1ull << IB_USER_VERBS_CMD_QUERY_AH) |
(1ull << IB_USER_VERBS_CMD_REG_MR) |
(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
(1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
(1ull << IB_USER_VERBS_CMD_POLL_CQ) |
(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
(1ull << IB_USER_VERBS_CMD_QUERY_QP) |
(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
(1ull << IB_USER_VERBS_CMD_POST_SEND) |
(1ull << IB_USER_VERBS_CMD_POST_RECV) |
(1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
(1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
(1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
(1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
(1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
dev->node_type = RDMA_NODE_IB_CA;
dev->phys_port_cnt = 1;
dev->num_comp_vectors = 1;
dev->dma_device = &dd->pcidev->dev;
dev->query_device = ipath_query_device;
dev->modify_device = ipath_modify_device;
dev->query_port = ipath_query_port;
dev->modify_port = ipath_modify_port;
dev->query_pkey = ipath_query_pkey;
dev->query_gid = ipath_query_gid;
dev->alloc_ucontext = ipath_alloc_ucontext;
dev->dealloc_ucontext = ipath_dealloc_ucontext;
dev->alloc_pd = ipath_alloc_pd;
dev->dealloc_pd = ipath_dealloc_pd;
dev->create_ah = ipath_create_ah;
dev->destroy_ah = ipath_destroy_ah;
dev->query_ah = ipath_query_ah;
dev->create_srq = ipath_create_srq;
dev->modify_srq = ipath_modify_srq;
dev->query_srq = ipath_query_srq;
dev->destroy_srq = ipath_destroy_srq;
dev->create_qp = ipath_create_qp;
dev->modify_qp = ipath_modify_qp;
dev->query_qp = ipath_query_qp;
dev->destroy_qp = ipath_destroy_qp;
dev->post_send = ipath_post_send;
dev->post_recv = ipath_post_receive;
dev->post_srq_recv = ipath_post_srq_receive;
dev->create_cq = ipath_create_cq;
dev->destroy_cq = ipath_destroy_cq;
dev->resize_cq = ipath_resize_cq;
dev->poll_cq = ipath_poll_cq;
dev->req_notify_cq = ipath_req_notify_cq;
dev->get_dma_mr = ipath_get_dma_mr;
dev->reg_phys_mr = ipath_reg_phys_mr;
dev->reg_user_mr = ipath_reg_user_mr;
dev->dereg_mr = ipath_dereg_mr;
dev->alloc_fmr = ipath_alloc_fmr;
dev->map_phys_fmr = ipath_map_phys_fmr;
dev->unmap_fmr = ipath_unmap_fmr;
dev->dealloc_fmr = ipath_dealloc_fmr;
dev->attach_mcast = ipath_multicast_attach;
dev->detach_mcast = ipath_multicast_detach;
dev->process_mad = ipath_process_mad;
dev->mmap = ipath_mmap;
dev->dma_ops = &ipath_dma_mapping_ops;
snprintf(dev->node_desc, sizeof(dev->node_desc),
IPATH_IDSTR " %s", init_utsname()->nodename);
ret = ib_register_device(dev);
if (ret)
goto err_reg;
if (ipath_verbs_register_sysfs(dev))
goto err_class;
enable_timer(dd);
goto bail;
err_class:
ib_unregister_device(dev);
err_reg:
kfree(idev->lk_table.table);
err_lk:
kfree(idev->qp_table.table);
err_qp:
ib_dealloc_device(dev);
ipath_dev_err(dd, "cannot register verbs: %d!\n", -ret);
idev = NULL;
bail:
dd->verbs_dev = idev;
return ret;
}
void ipath_unregister_ib_device(struct ipath_ibdev *dev)
{
struct ib_device *ibdev = &dev->ibdev;
disable_timer(dev->dd);
ib_unregister_device(ibdev);
if (!list_empty(&dev->pending[0]) ||
!list_empty(&dev->pending[1]) ||
!list_empty(&dev->pending[2]))
ipath_dev_err(dev->dd, "pending list not empty!\n");
if (!list_empty(&dev->piowait))
ipath_dev_err(dev->dd, "piowait list not empty!\n");
if (!list_empty(&dev->rnrwait))
ipath_dev_err(dev->dd, "rnrwait list not empty!\n");
if (!ipath_mcast_tree_empty())
ipath_dev_err(dev->dd, "multicast table memory leak!\n");
/*
* Note that ipath_unregister_ib_device() can be called before all
* the QPs are destroyed!
*/
ipath_free_all_qps(&dev->qp_table);
kfree(dev->qp_table.table);
kfree(dev->lk_table.table);
ib_dealloc_device(ibdev);
}
static ssize_t show_rev(struct class_device *cdev, char *buf)
{
struct ipath_ibdev *dev =
container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
return sprintf(buf, "%x\n", dev->dd->ipath_pcirev);
}
static ssize_t show_hca(struct class_device *cdev, char *buf)
{
struct ipath_ibdev *dev =
container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
int ret;
ret = dev->dd->ipath_f_get_boardname(dev->dd, buf, 128);
if (ret < 0)
goto bail;
strcat(buf, "\n");
ret = strlen(buf);
bail:
return ret;
}
static ssize_t show_stats(struct class_device *cdev, char *buf)
{
struct ipath_ibdev *dev =
container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
int i;
int len;
len = sprintf(buf,
"RC resends %d\n"
"RC no QACK %d\n"
"RC ACKs %d\n"
"RC SEQ NAKs %d\n"
"RC RDMA seq %d\n"
"RC RNR NAKs %d\n"
"RC OTH NAKs %d\n"
"RC timeouts %d\n"
"RC RDMA dup %d\n"
"RC stalls %d\n"
"piobuf wait %d\n"
"no piobuf %d\n"
"PKT drops %d\n"
"WQE errs %d\n",
dev->n_rc_resends, dev->n_rc_qacks, dev->n_rc_acks,
dev->n_seq_naks, dev->n_rdma_seq, dev->n_rnr_naks,
dev->n_other_naks, dev->n_timeouts,
dev->n_rdma_dup_busy, dev->n_rc_stalls, dev->n_piowait,
dev->n_no_piobuf, dev->n_pkt_drops, dev->n_wqe_errs);
for (i = 0; i < ARRAY_SIZE(dev->opstats); i++) {
const struct ipath_opcode_stats *si = &dev->opstats[i];
if (!si->n_packets && !si->n_bytes)
continue;
len += sprintf(buf + len, "%02x %llu/%llu\n", i,
(unsigned long long) si->n_packets,
(unsigned long long) si->n_bytes);
}
return len;
}
static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
static CLASS_DEVICE_ATTR(stats, S_IRUGO, show_stats, NULL);
static struct class_device_attribute *ipath_class_attributes[] = {
&class_device_attr_hw_rev,
&class_device_attr_hca_type,
&class_device_attr_board_id,
&class_device_attr_stats
};
static int ipath_verbs_register_sysfs(struct ib_device *dev)
{
int i;
int ret;
for (i = 0; i < ARRAY_SIZE(ipath_class_attributes); ++i)
if (class_device_create_file(&dev->class_dev,
ipath_class_attributes[i])) {
ret = 1;
goto bail;
}
ret = 0;
bail:
return ret;
}
