/*
* 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/utsname.h>
#include "ipath_kernel.h"
#include "ipath_verbs.h"
#include "ips_common.h"
/* Not static, because we don't want the compiler removing it */
const char ipath_verbs_version[] = "ipath_verbs " IPATH_IDSTR;
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)");
unsigned int ib_ipath_debug; /* debug mask */
module_param_named(debug, ib_ipath_debug, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(debug, "Verbs debug mask");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("PathScale <support@pathscale.com>");
MODULE_DESCRIPTION("Pathscale InfiniPath driver");
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,
};
/*
* 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;
BUG_ON(len == 0);
if (len > length)
len = length;
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 > sge->sge_length) {
length -= sge->sge_length;
ss->sge = *ss->sg_list++;
}
while (length) {
u32 len = sge->length;
BUG_ON(len == 0);
if (len > length)
len = length;
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_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;
/* Check that state is OK to post send. */
if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)) {
*bad_wr = wr;
err = -EINVAL;
goto bail;
}
for (; wr; wr = wr->next) {
switch (qp->ibqp.qp_type) {
case IB_QPT_UC:
case IB_QPT_RC:
err = ipath_post_rc_send(qp, wr);
break;
case IB_QPT_SMI:
case IB_QPT_GSI:
case IB_QPT_UD:
err = ipath_post_ud_send(qp, wr);
break;
default:
err = -EINVAL;
}
if (err) {
*bad_wr = wr;
break;
}
}
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);
unsigned long flags;
int ret;
/* Check that state is OK to post receive. */
if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_RECV_OK)) {
*bad_wr = wr;
ret = -EINVAL;
goto bail;
}
for (; wr; wr = wr->next) {
struct ipath_rwqe *wqe;
u32 next;
int i, j;
if (wr->num_sge > qp->r_rq.max_sge) {
*bad_wr = wr;
ret = -ENOMEM;
goto bail;
}
spin_lock_irqsave(&qp->r_rq.lock, flags);
next = qp->r_rq.head + 1;
if (next >= qp->r_rq.size)
next = 0;
if (next == qp->r_rq.tail) {
spin_unlock_irqrestore(&qp->r_rq.lock, flags);
*bad_wr = wr;
ret = -ENOMEM;
goto bail;
}
wqe = get_rwqe_ptr(&qp->r_rq, qp->r_rq.head);
wqe->wr_id = wr->wr_id;
wqe->sg_list[0].mr = NULL;
wqe->sg_list[0].vaddr = NULL;
wqe->sg_list[0].length = 0;
wqe->sg_list[0].sge_length = 0;
wqe->length = 0;
for (i = 0, j = 0; i < wr->num_sge; i++) {
/* Check LKEY */
if (to_ipd(qp->ibqp.pd)->user &&
wr->sg_list[i].lkey == 0) {
spin_unlock_irqrestore(&qp->r_rq.lock,
flags);
*bad_wr = wr;
ret = -EINVAL;
goto bail;
}
if (wr->sg_list[i].length == 0)
continue;
if (!ipath_lkey_ok(
&to_idev(qp->ibqp.device)->lk_table,
&wqe->sg_list[j], &wr->sg_list[i],
IB_ACCESS_LOCAL_WRITE)) {
spin_unlock_irqrestore(&qp->r_rq.lock,
flags);
*bad_wr = wr;
ret = -EINVAL;
goto bail;
}
wqe->length += wr->sg_list[i].length;
j++;
}
wqe->num_sge = j;
qp->r_rq.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:
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 and 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.
*/
static void ipath_ib_rcv(void *arg, void *rhdr, void *data, u32 tlen)
{
struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
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 < IPS_MULTICAST_LID_BASE) {
lid &= ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
if (unlikely(lid != ipath_layer_get_lid(dev->dd))) {
dev->rcv_errors++;
goto bail;
}
}
/* Check for GRH */
lnh = be16_to_cpu(hdr->lrh[0]) & 3;
if (lnh == IPS_LRH_BTH)
ohdr = &hdr->u.oth;
else if (lnh == IPS_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]) & IPS_QPN_MASK;
if (qp_num == IPS_MULTICAST_QPN) {
struct ipath_mcast *mcast;
struct ipath_mcast_qp *p;
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, lnh == IPS_LRH_GRH, 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 == IPS_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(void *arg)
{
struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
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(&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(&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_layer_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_layer_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);
}
}
/**
* 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).
*/
static int ipath_ib_piobufavail(void *arg)
{
struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
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(&qp->piowait);
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);
u32 vendor, boardrev, majrev, minrev;
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;
ipath_layer_query_device(dev->dd, &vendor, &boardrev,
&majrev, &minrev);
props->vendor_id = vendor;
props->vendor_part_id = boardrev;
props->hw_ver = boardrev << 16 | majrev << 8 | minrev;
props->sys_image_guid = dev->sys_image_guid;
props->max_mr_size = ~0ull;
props->max_qp = 0xffff;
props->max_qp_wr = 0xffff;
props->max_sge = 255;
props->max_cq = 0xffff;
props->max_cqe = 0xffff;
props->max_mr = 0xffff;
props->max_pd = 0xffff;
props->max_qp_rd_atom = 1;
props->max_qp_init_rd_atom = 1;
/* props->max_res_rd_atom */
props->max_srq = 0xffff;
props->max_srq_wr = 0xffff;
props->max_srq_sge = 255;
/* props->local_ca_ack_delay */
props->atomic_cap = IB_ATOMIC_HCA;
props->max_pkeys = ipath_layer_get_npkeys(dev->dd);
props->max_mcast_grp = 0xffff;
props->max_mcast_qp_attach = 0xffff;
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,
};
static int ipath_query_port(struct ib_device *ibdev,
u8 port, struct ib_port_attr *props)
{
struct ipath_ibdev *dev = to_idev(ibdev);
enum ib_mtu mtu;
u16 lid = ipath_layer_get_lid(dev->dd);
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 = ipath_layer_get_lastibcstat(dev->dd);
props->state = ((ibcstat >> 4) & 0x3) + 1;
/* See phys_state_show() */
props->phys_state = ipath_cvt_physportstate[
ipath_layer_get_lastibcstat(dev->dd) & 0xf];
props->port_cap_flags = dev->port_cap_flags;
props->gid_tbl_len = 1;
props->max_msg_sz = 4096;
props->pkey_tbl_len = ipath_layer_get_npkeys(dev->dd);
props->bad_pkey_cntr = ipath_layer_get_cr_errpkey(dev->dd) -
dev->n_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;
props->max_mtu = IB_MTU_4096;
switch (ipath_layer_get_ibmtu(dev->dd)) {
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_layer_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 = ipath_layer_get_guid(dev->dd);
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_pd *pd;
struct ib_pd *ret;
pd = kmalloc(sizeof *pd, GFP_KERNEL);
if (!pd) {
ret = ERR_PTR(-ENOMEM);
goto bail;
}
/* 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);
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;
/* A multicast address requires a GRH (see ch. 8.4.1). */
if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
ah_attr->dlid != IPS_PERMISSIVE_LID &&
!(ah_attr->ah_flags & IB_AH_GRH)) {
ret = ERR_PTR(-EINVAL);
goto bail;
}
ah = kmalloc(sizeof *ah, GFP_ATOMIC);
if (!ah) {
ret = ERR_PTR(-ENOMEM);
goto bail;
}
/* 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_ah *ah = to_iah(ibah);
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;
}
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_layer_get_npkeys(dev->dd)) {
ret = -EINVAL;
goto bail;
}
*pkey = ipath_layer_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);
/**
* ipath_register_ib_device - register our device with the infiniband core
* @unit: the device number to register
* @dd: the device data structure
* Return the allocated ipath_ibdev pointer or NULL on error.
*/
static void *ipath_register_ib_device(int unit, struct ipath_devdata *dd)
{
struct ipath_ibdev *idev;
struct ib_device *dev;
int ret;
idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev);
if (idev == NULL)
goto bail;
dev = &idev->ibdev;
/* Only need to initialize non-zero fields. */
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;
}
spin_lock_init(&idev->pending_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[5] = IB_PMA_PORT_XMIT_WAIT;
idev->link_width_enabled = 3; /* 1x or 4x */
/*
* 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 = ipath_layer_get_guid(dd);
idev->sys_image_guid = sys_image_guid;
idev->ib_unit = unit;
idev->dd = dd;
strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX);
dev->node_guid = ipath_layer_get_guid(dd);
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 = IB_NODE_CA;
dev->phys_port_cnt = 1;
dev->dma_device = ipath_layer_get_device(dd);
dev->class_dev.dev = dev->dma_device;
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;
snprintf(dev->node_desc, sizeof(dev->node_desc),
IPATH_IDSTR " %s kernel_SMA", system_utsname.nodename);
ret = ib_register_device(dev);
if (ret)
goto err_reg;
if (ipath_verbs_register_sysfs(dev))
goto err_class;
ipath_layer_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);
_VERBS_ERROR("ib_ipath%d cannot register verbs (%d)!\n",
unit, -ret);
idev = NULL;
bail:
return idev;
}
static void ipath_unregister_ib_device(void *arg)
{
struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
struct ib_device *ibdev = &dev->ibdev;
ipath_layer_disable_timer(dev->dd);
ib_unregister_device(ibdev);
if (!list_empty(&dev->pending[0]) ||
!list_empty(&dev->pending[1]) ||
!list_empty(&dev->pending[2]))
_VERBS_ERROR("ipath%d pending list not empty!\n",
dev->ib_unit);
if (!list_empty(&dev->piowait))
_VERBS_ERROR("ipath%d piowait list not empty!\n",
dev->ib_unit);
if (!list_empty(&dev->rnrwait))
_VERBS_ERROR("ipath%d rnrwait list not empty!\n",
dev->ib_unit);
if (!ipath_mcast_tree_empty())
_VERBS_ERROR("ipath%d multicast table memory leak!\n",
dev->ib_unit);
/*
* 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 int __init ipath_verbs_init(void)
{
return ipath_verbs_register(ipath_register_ib_device,
ipath_unregister_ib_device,
ipath_ib_piobufavail, ipath_ib_rcv,
ipath_ib_timer);
}
static void __exit ipath_verbs_cleanup(void)
{
ipath_verbs_unregister();
}
static ssize_t show_rev(struct class_device *cdev, char *buf)
{
struct ipath_ibdev *dev =
container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
int vendor, boardrev, majrev, minrev;
ipath_layer_query_device(dev->dd, &vendor, &boardrev,
&majrev, &minrev);
return sprintf(buf, "%d.%d\n", majrev, minrev);
}
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 = ipath_layer_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"
"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_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;
}
module_init(ipath_verbs_init);
module_exit(ipath_verbs_cleanup);
