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/*
* Copyright (c) 2010-2011 Qlogic Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* File: qla_isr.c
* Author : David C Somayajulu, Qlogic Corporation, Aliso Viejo, CA 92656.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/qlxgb/qla_isr.c 227064 2011-11-03 21:20:22Z bz $");
#include "qla_os.h"
#include "qla_reg.h"
#include "qla_hw.h"
#include "qla_def.h"
#include "qla_inline.h"
#include "qla_ver.h"
#include "qla_glbl.h"
#include "qla_dbg.h"
static void qla_replenish_normal_rx(qla_host_t *ha, qla_sds_t *sdsp);
static void qla_replenish_jumbo_rx(qla_host_t *ha, qla_sds_t *sdsp);
/*
* Name: qla_rx_intr
* Function: Handles normal ethernet frames received
*/
static void
qla_rx_intr(qla_host_t *ha, uint64_t data, uint32_t sds_idx,
struct lro_ctrl *lro)
{
uint32_t idx, length, status, ring;
qla_rx_buf_t *rxb;
struct mbuf *mp;
struct ifnet *ifp = ha->ifp;
qla_sds_t *sdsp;
struct ether_vlan_header *eh;
sdsp = &ha->hw.sds[sds_idx];
ring = (uint32_t)Q8_STAT_DESC_TYPE(data);
idx = (uint32_t)Q8_STAT_DESC_HANDLE(data);
length = (uint32_t)Q8_STAT_DESC_TOTAL_LENGTH(data);
status = (uint32_t)Q8_STAT_DESC_STATUS(data);
if (ring == 0) {
if ((idx >= NUM_RX_DESCRIPTORS) || (length > MCLBYTES)) {
device_printf(ha->pci_dev, "%s: ring[%d] index[0x%08x]"
" len[0x%08x] invalid\n",
__func__, ring, idx, length);
return;
}
} else {
if ((idx >= NUM_RX_JUMBO_DESCRIPTORS)||(length > MJUM9BYTES)) {
device_printf(ha->pci_dev, "%s: ring[%d] index[0x%08x]"
" len[0x%08x] invalid\n",
__func__, ring, idx, length);
return;
}
}
if (ring == 0)
rxb = &ha->rx_buf[idx];
else
rxb = &ha->rx_jbuf[idx];
QL_ASSERT((rxb != NULL),\
("%s: [r, i, sds_idx]=[%d, 0x%x, %d] rxb != NULL\n",\
__func__, ring, idx, sds_idx));
mp = rxb->m_head;
QL_ASSERT((mp != NULL),\
("%s: [r,i,rxb, sds_idx]=[%d, 0x%x, %p, %d] mp != NULL\n",\
__func__, ring, idx, rxb, sds_idx));
bus_dmamap_sync(ha->rx_tag, rxb->map, BUS_DMASYNC_POSTREAD);
if (ring == 0) {
rxb->m_head = NULL;
rxb->next = sdsp->rxb_free;
sdsp->rxb_free = rxb;
sdsp->rx_free++;
} else {
rxb->m_head = NULL;
rxb->next = sdsp->rxjb_free;
sdsp->rxjb_free = rxb;
sdsp->rxj_free++;
}
mp->m_len = length;
mp->m_pkthdr.len = length;
mp->m_pkthdr.rcvif = ifp;
eh = mtod(mp, struct ether_vlan_header *);
if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
uint32_t *data = (uint32_t *)eh;
mp->m_pkthdr.ether_vtag = ntohs(eh->evl_tag);
mp->m_flags |= M_VLANTAG;
*(data + 3) = *(data + 2);
*(data + 2) = *(data + 1);
*(data + 1) = *data;
m_adj(mp, ETHER_VLAN_ENCAP_LEN);
}
if (status == Q8_STAT_DESC_STATUS_CHKSUM_OK) {
mp->m_pkthdr.csum_flags = (CSUM_IP_CHECKED | CSUM_IP_VALID);
} else {
mp->m_pkthdr.csum_flags = 0;
}
if (lro->lro_cnt && (tcp_lro_rx(lro, mp, 0) == 0)) {
/* LRO packet has been successfuly queued */
} else {
(*ifp->if_input)(ifp, mp);
}
if (sdsp->rx_free > std_replenish)
qla_replenish_normal_rx(ha, sdsp);
if (sdsp->rxj_free > jumbo_replenish)
qla_replenish_jumbo_rx(ha, sdsp);
return;
}
static void
qla_replenish_jumbo_rx(qla_host_t *ha, qla_sds_t *sdsp)
{
qla_rx_buf_t *rxb;
int count = jumbo_replenish;
uint32_t rxj_next;
if (!mtx_trylock(&ha->rxj_lock))
return;
rxj_next = ha->hw.rxj_next;
while (count--) {
rxb = sdsp->rxjb_free;
if (rxb == NULL)
break;
sdsp->rxjb_free = rxb->next;
sdsp->rxj_free--;
if (qla_get_mbuf(ha, rxb, NULL, RDS_RING_INDEX_JUMBO) == 0) {
qla_set_hw_rcv_desc(ha, RDS_RING_INDEX_JUMBO,
ha->hw.rxj_in, rxb->handle, rxb->paddr,
(rxb->m_head)->m_pkthdr.len);
ha->hw.rxj_in++;
if (ha->hw.rxj_in == NUM_RX_JUMBO_DESCRIPTORS)
ha->hw.rxj_in = 0;
ha->hw.rxj_next++;
if (ha->hw.rxj_next == NUM_RX_JUMBO_DESCRIPTORS)
ha->hw.rxj_next = 0;
} else {
device_printf(ha->pci_dev,
"%s: qla_get_mbuf [1,(%d),(%d)] failed\n",
__func__, ha->hw.rxj_in, rxb->handle);
rxb->m_head = NULL;
rxb->next = sdsp->rxjb_free;
sdsp->rxjb_free = rxb;
sdsp->rxj_free++;
break;
}
}
if (rxj_next != ha->hw.rxj_next) {
QL_UPDATE_RDS_PRODUCER_INDEX(ha, 1, ha->hw.rxj_next);
}
mtx_unlock(&ha->rxj_lock);
}
static void
qla_replenish_normal_rx(qla_host_t *ha, qla_sds_t *sdsp)
{
qla_rx_buf_t *rxb;
int count = std_replenish;
uint32_t rx_next;
if (!mtx_trylock(&ha->rx_lock))
return;
rx_next = ha->hw.rx_next;
while (count--) {
rxb = sdsp->rxb_free;
if (rxb == NULL)
break;
sdsp->rxb_free = rxb->next;
sdsp->rx_free--;
if (qla_get_mbuf(ha, rxb, NULL, RDS_RING_INDEX_NORMAL) == 0) {
qla_set_hw_rcv_desc(ha, RDS_RING_INDEX_NORMAL,
ha->hw.rx_in, rxb->handle, rxb->paddr,
(rxb->m_head)->m_pkthdr.len);
ha->hw.rx_in++;
if (ha->hw.rx_in == NUM_RX_DESCRIPTORS)
ha->hw.rx_in = 0;
ha->hw.rx_next++;
if (ha->hw.rx_next == NUM_RX_DESCRIPTORS)
ha->hw.rx_next = 0;
} else {
device_printf(ha->pci_dev,
"%s: qla_get_mbuf [0,(%d),(%d)] failed\n",
__func__, ha->hw.rx_in, rxb->handle);
rxb->m_head = NULL;
rxb->next = sdsp->rxb_free;
sdsp->rxb_free = rxb;
sdsp->rx_free++;
break;
}
}
if (rx_next != ha->hw.rx_next) {
QL_UPDATE_RDS_PRODUCER_INDEX(ha, 0, ha->hw.rx_next);
}
mtx_unlock(&ha->rx_lock);
}
/*
* Name: qla_isr
* Function: Main Interrupt Service Routine
*/
static uint32_t
qla_rcv_isr(qla_host_t *ha, uint32_t sds_idx, uint32_t count)
{
device_t dev;
qla_hw_t *hw;
uint32_t comp_idx, desc_count;
q80_stat_desc_t *sdesc;
struct lro_ctrl *lro;
struct lro_entry *queued;
uint32_t ret = 0;
dev = ha->pci_dev;
hw = &ha->hw;
hw->sds[sds_idx].rcv_active = 1;
if (ha->flags.stop_rcv) {
hw->sds[sds_idx].rcv_active = 0;
return 0;
}
QL_DPRINT2((dev, "%s: [%d]enter\n", __func__, sds_idx));
/*
* receive interrupts
*/
comp_idx = hw->sds[sds_idx].sdsr_next;
lro = &hw->sds[sds_idx].lro;
while (count--) {
sdesc = (q80_stat_desc_t *)
&hw->sds[sds_idx].sds_ring_base[comp_idx];
if (Q8_STAT_DESC_OWNER((sdesc->data[0])) !=
Q8_STAT_DESC_OWNER_HOST) {
QL_DPRINT2((dev, "%s: data %p sdsr_next 0x%08x\n",
__func__, (void *)sdesc->data[0], comp_idx));
break;
}
desc_count = Q8_STAT_DESC_COUNT((sdesc->data[0]));
switch (Q8_STAT_DESC_OPCODE((sdesc->data[0]))) {
case Q8_STAT_DESC_OPCODE_RCV_PKT:
case Q8_STAT_DESC_OPCODE_SYN_OFFLOAD:
qla_rx_intr(ha, (sdesc->data[0]), sds_idx, lro);
break;
default:
device_printf(dev, "%s: default 0x%llx!\n", __func__,
(long long unsigned int)sdesc->data[0]);
break;
}
while (desc_count--) {
sdesc->data[0] =
Q8_STAT_DESC_SET_OWNER(Q8_STAT_DESC_OWNER_FW);
comp_idx = (comp_idx + 1) & (NUM_STATUS_DESCRIPTORS-1);
sdesc = (q80_stat_desc_t *)
&hw->sds[sds_idx].sds_ring_base[comp_idx];
}
}
while((!SLIST_EMPTY(&lro->lro_active))) {
queued = SLIST_FIRST(&lro->lro_active);
SLIST_REMOVE_HEAD(&lro->lro_active, next);
tcp_lro_flush(lro, queued);
}
if (hw->sds[sds_idx].sdsr_next != comp_idx) {
QL_UPDATE_SDS_CONSUMER_INDEX(ha, sds_idx, comp_idx);
}
hw->sds[sds_idx].sdsr_next = comp_idx;
sdesc = (q80_stat_desc_t *)&hw->sds[sds_idx].sds_ring_base[comp_idx];
if ((sds_idx == 0) && (Q8_STAT_DESC_OWNER((sdesc->data[0])) ==
Q8_STAT_DESC_OWNER_HOST)) {
ret = -1;
}
hw->sds[sds_idx].rcv_active = 0;
return (ret);
}
void
qla_isr(void *arg)
{
qla_ivec_t *ivec = arg;
qla_host_t *ha;
uint32_t sds_idx;
uint32_t ret;
ha = ivec->ha;
sds_idx = ivec->irq_rid - 1;
if (sds_idx >= ha->hw.num_sds_rings) {
device_printf(ha->pci_dev, "%s: bogus sds_idx 0x%x\n", __func__,
sds_idx);
return;
}
if (sds_idx == 0)
taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
ret = qla_rcv_isr(ha, sds_idx, rcv_pkt_thres);
if (sds_idx == 0)
taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
if (ret) {
taskqueue_enqueue(ha->irq_vec[sds_idx].rcv_tq,
&ha->irq_vec[sds_idx].rcv_task);
} else {
QL_ENABLE_INTERRUPTS(ha, sds_idx);
}
}
void
qla_rcv(void *context, int pending)
{
qla_ivec_t *ivec = context;
qla_host_t *ha;
device_t dev;
qla_hw_t *hw;
uint32_t sds_idx;
uint32_t ret;
struct ifnet *ifp;
ha = ivec->ha;
dev = ha->pci_dev;
hw = &ha->hw;
sds_idx = ivec->irq_rid - 1;
ifp = ha->ifp;
do {
if (sds_idx == 0) {
if (qla_le32_to_host(*(hw->tx_cons)) != hw->txr_comp) {
taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
} else if ((ifp->if_snd.ifq_head != NULL) &&
QL_RUNNING(ifp)) {
taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
}
}
ret = qla_rcv_isr(ha, sds_idx, rcv_pkt_thres_d);
} while (ret);
if (sds_idx == 0)
taskqueue_enqueue(ha->tx_tq, &ha->tx_task);
QL_ENABLE_INTERRUPTS(ha, sds_idx);
}