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freebsd-dev/sys/dev/sume/if_sume.c
Marko Zec bd36872867 Driver for 4x10Gb Ethernet reference NIC FPGA design for NetFPGA SUME 
development board.

Submitted by:	Denis Salopek <denis.salopek AT fer.hr>
Reported by:	zec, bz (src); rgrimes, bcr (manpages)
MFC after:	7 days
Sponsored by:	Google Summer of Code 2020
Differential Revision:	https://reviews.freebsd.org/D26074
2020-08-30 07:34:32 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2015 Bjoern A. Zeeb
* Copyright (c) 2020 Denis Salopek
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249
* ("MRC2"), as part of the DARPA MRC research programme.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <machine/bus.h>
#include "adapter.h"
#define PCI_VENDOR_ID_XILINX 0x10ee
#define PCI_DEVICE_ID_SUME 0x7028
/* SUME bus driver interface */
static int sume_probe(device_t);
static int sume_attach(device_t);
static int sume_detach(device_t);
static device_method_t sume_methods[] = {
DEVMETHOD(device_probe, sume_probe),
DEVMETHOD(device_attach, sume_attach),
DEVMETHOD(device_detach, sume_detach),
DEVMETHOD_END
};
static driver_t sume_driver = {
"sume",
sume_methods,
sizeof(struct sume_adapter)
};
/*
* The DMA engine for SUME generates interrupts for each RX/TX transaction.
* Depending on the channel (0 if packet transaction, 1 if register transaction)
* the used bits of the interrupt vector will be the lowest or the second lowest
* 5 bits.
*
* When receiving packets from SUME (RX):
* (1) SUME received a packet on one of the interfaces.
* (2) SUME generates an interrupt vector, bit 00001 is set (channel 0 - new RX
* transaction).
* (3) We read the length of the incoming packet and the offset along with the
* 'last' flag from the SUME registers.
* (4) We prepare for the DMA transaction by setting the bouncebuffer on the
* address buf_addr. For now, this is how it's done:
* - First 3*sizeof(uint32_t) bytes are: lower and upper 32 bits of physical
* address where we want the data to arrive (buf_addr[0] and buf_addr[1]),
* and length of incoming data (buf_addr[2]).
* - Data will start right after, at buf_addr+3*sizeof(uint32_t). The
* physical address buf_hw_addr is a block of contiguous memory mapped to
* buf_addr, so we can set the incoming data's physical address (buf_addr[0]
* and buf_addr[1]) to buf_hw_addr+3*sizeof(uint32_t).
* (5) We notify SUME that the bouncebuffer is ready for the transaction by
* writing the lower/upper physical address buf_hw_addr to the SUME
* registers RIFFA_TX_SG_ADDR_LO_REG_OFF and RIFFA_TX_SG_ADDR_HI_REG_OFF as
* well as the number of segments to the register RIFFA_TX_SG_LEN_REG_OFF.
* (6) SUME generates an interrupt vector, bit 00010 is set (channel 0 -
* bouncebuffer received).
* (7) SUME generates an interrupt vector, bit 00100 is set (channel 0 -
* transaction is done).
* (8) SUME can do both steps (6) and (7) using the same interrupt.
* (8) We read the first 16 bytes (metadata) of the received data and note the
* incoming interface so we can later forward it to the right one in the OS
* (sume0, sume1, sume2 or sume3).
* (10) We create an mbuf and copy the data from the bouncebuffer to the mbuf
* and set the mbuf rcvif to the incoming interface.
* (11) We forward the mbuf to the appropriate interface via ifp->if_input.
*
* When sending packets to SUME (TX):
* (1) The OS calls sume_if_start() function on TX.
* (2) We get the mbuf packet data and copy it to the
* buf_addr+3*sizeof(uint32_t) + metadata 16 bytes.
* (3) We create the metadata based on the output interface and copy it to the
* buf_addr+3*sizeof(uint32_t).
* (4) We write the offset/last and length of the packet to the SUME registers
* RIFFA_RX_OFFLAST_REG_OFF and RIFFA_RX_LEN_REG_OFF.
* (5) We fill the bouncebuffer by filling the first 3*sizeof(uint32_t) bytes
* with the physical address and length just as in RX step (4).
* (6) We notify SUME that the bouncebuffer is ready by writing to SUME
* registers RIFFA_RX_SG_ADDR_LO_REG_OFF, RIFFA_RX_SG_ADDR_HI_REG_OFF and
* RIFFA_RX_SG_LEN_REG_OFF just as in RX step (5).
* (7) SUME generates an interrupt vector, bit 01000 is set (channel 0 -
* bouncebuffer is read).
* (8) SUME generates an interrupt vector, bit 10000 is set (channel 0 -
* transaction is done).
* (9) SUME can do both steps (7) and (8) using the same interrupt.
*
* Internal registers
* Every module in the SUME hardware has its own set of internal registers
* (IDs, for debugging and statistic purposes, etc.). Their base addresses are
* defined in 'projects/reference_nic/hw/tcl/reference_nic_defines.tcl' and the
* offsets to different memory locations of every module are defined in their
* corresponding folder inside the library. These registers can be RO/RW and
* there is a special method to fetch/change this data over 1 or 2 DMA
* transactions. For writing, by calling the sume_module_reg_write(). For
* reading, by calling the sume_module_reg_write() and then
* sume_module_reg_read(). Check those functions for more information.
*/
MALLOC_DECLARE(M_SUME);
MALLOC_DEFINE(M_SUME, "sume", "NetFPGA SUME device driver");
static void check_tx_queues(struct sume_adapter *);
static void sume_fill_bb_desc(struct sume_adapter *, struct riffa_chnl_dir *,
uint64_t);
static struct unrhdr *unr;
static struct {
uint16_t device;
char *desc;
} sume_pciids[] = {
{PCI_DEVICE_ID_SUME, "NetFPGA SUME reference NIC"},
};
static inline uint32_t
read_reg(struct sume_adapter *adapter, int offset)
{
return (bus_space_read_4(adapter->bt, adapter->bh, offset << 2));
}
static inline void
write_reg(struct sume_adapter *adapter, int offset, uint32_t val)
{
bus_space_write_4(adapter->bt, adapter->bh, offset << 2, val);
}
static int
sume_probe(device_t dev)
{
int i;
uint16_t v = pci_get_vendor(dev);
uint16_t d = pci_get_device(dev);
if (v != PCI_VENDOR_ID_XILINX)
return (ENXIO);
for (i = 0; i < nitems(sume_pciids); i++) {
if (d == sume_pciids[i].device) {
device_set_desc(dev, sume_pciids[i].desc);
return (BUS_PROBE_DEFAULT);
}
}
return (ENXIO);
}
/*
* Building mbuf for packet received from SUME. We expect to receive 'len'
* bytes of data (including metadata) written from the bouncebuffer address
* buf_addr+3*sizeof(uint32_t). Metadata will tell us which SUME interface
* received the packet (sport will be 1, 2, 4 or 8), the packet length (plen),
* and the magic word needs to be 0xcafe. When we have the packet data, we
* create an mbuf and copy the data to it using m_copyback() function, set the
* correct interface to rcvif and return the mbuf to be later sent to the OS
* with if_input.
*/
static struct mbuf *
sume_rx_build_mbuf(struct sume_adapter *adapter, uint32_t len)
{
struct nf_priv *nf_priv;
struct mbuf *m;
struct ifnet *ifp = NULL;
int np;
uint16_t dport, plen, magic;
device_t dev = adapter->dev;
uint8_t *indata = (uint8_t *)
adapter->recv[SUME_RIFFA_CHANNEL_DATA]->buf_addr +
sizeof(struct nf_bb_desc);
struct nf_metadata *mdata = (struct nf_metadata *) indata;
/* The metadata header is 16 bytes. */
if (len < sizeof(struct nf_metadata)) {
device_printf(dev, "short frame (%d)\n", len);
adapter->packets_err++;
adapter->bytes_err += len;
return (NULL);
}
dport = le16toh(mdata->dport);
plen = le16toh(mdata->plen);
magic = le16toh(mdata->magic);
if (sizeof(struct nf_metadata) + plen > len ||
magic != SUME_RIFFA_MAGIC) {
device_printf(dev, "corrupted packet (%zd + %d > %d || magic "
"0x%04x != 0x%04x)\n", sizeof(struct nf_metadata), plen,
len, magic, SUME_RIFFA_MAGIC);
return (NULL);
}
/* We got the packet from one of the even bits */
np = (ffs(dport & SUME_DPORT_MASK) >> 1) - 1;
if (np > SUME_NPORTS) {
device_printf(dev, "invalid destination port 0x%04x (%d)\n",
dport, np);
adapter->packets_err++;
adapter->bytes_err += plen;
return (NULL);
}
ifp = adapter->ifp[np];
nf_priv = ifp->if_softc;
nf_priv->stats.rx_packets++;
nf_priv->stats.rx_bytes += plen;
/* If the interface is down, well, we are done. */
if (!(ifp->if_flags & IFF_UP)) {
nf_priv->stats.ifc_down_packets++;
nf_priv->stats.ifc_down_bytes += plen;
return (NULL);
}
if (adapter->sume_debug)
printf("Building mbuf with length: %d\n", plen);
m = m_getm(NULL, plen, M_NOWAIT, MT_DATA);
if (m == NULL) {
adapter->packets_err++;
adapter->bytes_err += plen;
return (NULL);
}
/* Copy the data in at the right offset. */
m_copyback(m, 0, plen, (void *) (indata + sizeof(struct nf_metadata)));
m->m_pkthdr.rcvif = ifp;
return (m);
}
/*
* SUME interrupt handler for when we get a valid interrupt from the board.
* Theoretically, we can receive interrupt for any of the available channels,
* but RIFFA DMA uses only 2: 0 and 1, so we use only vect0. The vector is a 32
* bit number, using 5 bits for every channel, the least significant bits
* correspond to channel 0 and the next 5 bits correspond to channel 1. Vector
* bits for RX/TX are:
* RX
* bit 0 - new transaction from SUME
* bit 1 - SUME received our bouncebuffer address
* bit 2 - SUME copied the received data to our bouncebuffer, transaction done
* TX
* bit 3 - SUME received our bouncebuffer address
* bit 4 - SUME copied the data from our bouncebuffer, transaction done
*
* There are two finite state machines (one for TX, one for RX). We loop
* through channels 0 and 1 to check and our current state and which interrupt
* bit is set.
* TX
* SUME_RIFFA_CHAN_STATE_IDLE: waiting for the first TX transaction.
* SUME_RIFFA_CHAN_STATE_READY: we prepared (filled with data) the bouncebuffer
* and triggered the SUME for the TX transaction. Waiting for interrupt bit 3
* to go to the next state.
* SUME_RIFFA_CHAN_STATE_READ: waiting for interrupt bit 4 (for SUME to send
* our packet). Then we get the length of the sent data and go back to the
* IDLE state.
* RX
* SUME_RIFFA_CHAN_STATE_IDLE: waiting for the interrupt bit 0 (new RX
* transaction). When we get it, we prepare our bouncebuffer for reading and
* trigger the SUME to start the transaction. Go to the next state.
* SUME_RIFFA_CHAN_STATE_READY: waiting for the interrupt bit 1 (SUME got our
* bouncebuffer). Go to the next state.
* SUME_RIFFA_CHAN_STATE_READ: SUME copied data and our bouncebuffer is ready,
* we can build the mbuf and go back to the IDLE state.
*/
static void
sume_intr_handler(void *arg)
{
struct sume_adapter *adapter = arg;
uint32_t vect, vect0, len;
int ch, loops;
device_t dev = adapter->dev;
struct mbuf *m = NULL;
struct ifnet *ifp = NULL;
struct riffa_chnl_dir *send, *recv;
SUME_LOCK(adapter);
vect0 = read_reg(adapter, RIFFA_IRQ_REG0_OFF);
if ((vect0 & SUME_INVALID_VECT) != 0) {
SUME_UNLOCK(adapter);
return;
}
/*
* We only have one interrupt for all channels and no way
* to quickly lookup for which channel(s) we got an interrupt?
*/
for (ch = 0; ch < SUME_RIFFA_CHANNELS; ch++) {
vect = vect0 >> (5 * ch);
send = adapter->send[ch];
recv = adapter->recv[ch];
loops = 0;
while ((vect & (SUME_MSI_TXBUF | SUME_MSI_TXDONE)) &&
loops <= 5) {
if (adapter->sume_debug)
device_printf(dev, "TX ch %d state %u vect = "
"0x%08x\n", ch, send->state, vect);
switch (send->state) {
case SUME_RIFFA_CHAN_STATE_IDLE:
break;
case SUME_RIFFA_CHAN_STATE_READY:
if (!(vect & SUME_MSI_TXBUF)) {
device_printf(dev, "ch %d unexpected "
"interrupt in send+3 state %u: "
"vect = 0x%08x\n", ch, send->state,
vect);
send->recovery = 1;
break;
}
send->state = SUME_RIFFA_CHAN_STATE_READ;
vect &= ~SUME_MSI_TXBUF;
break;
case SUME_RIFFA_CHAN_STATE_READ:
if (!(vect & SUME_MSI_TXDONE)) {
device_printf(dev, "ch %d unexpected "
"interrupt in send+4 state %u: "
"vect = 0x%08x\n", ch, send->state,
vect);
send->recovery = 1;
break;
}
send->state = SUME_RIFFA_CHAN_STATE_LEN;
len = read_reg(adapter, RIFFA_CHNL_REG(ch,
RIFFA_RX_TNFR_LEN_REG_OFF));
if (ch == SUME_RIFFA_CHANNEL_DATA) {
send->state =
SUME_RIFFA_CHAN_STATE_IDLE;
check_tx_queues(adapter);
} else if (ch == SUME_RIFFA_CHANNEL_REG)
wakeup(&send->event);
else {
device_printf(dev, "ch %d unexpected "
"interrupt in send+4 state %u: "
"vect = 0x%08x\n", ch, send->state,
vect);
send->recovery = 1;
}
vect &= ~SUME_MSI_TXDONE;
break;
case SUME_RIFFA_CHAN_STATE_LEN:
break;
default:
device_printf(dev, "unknown TX state!\n");
}
loops++;
}
if ((vect & (SUME_MSI_TXBUF | SUME_MSI_TXDONE)) &&
send->recovery)
device_printf(dev, "ch %d ignoring vect = 0x%08x "
"during TX; not in recovery; state = %d loops = "
"%d\n", ch, vect, send->state, loops);
loops = 0;
while ((vect & (SUME_MSI_RXQUE | SUME_MSI_RXBUF |
SUME_MSI_RXDONE)) && loops < 5) {
if (adapter->sume_debug)
device_printf(dev, "RX ch %d state %u vect = "
"0x%08x\n", ch, recv->state, vect);
switch (recv->state) {
case SUME_RIFFA_CHAN_STATE_IDLE:
if (!(vect & SUME_MSI_RXQUE)) {
device_printf(dev, "ch %d unexpected "
"interrupt in recv+0 state %u: "
"vect = 0x%08x\n", ch, recv->state,
vect);
recv->recovery = 1;
break;
}
uint32_t max_ptr;
/* Clear recovery state. */
recv->recovery = 0;
/* Get offset and length. */
recv->offlast = read_reg(adapter,
RIFFA_CHNL_REG(ch,
RIFFA_TX_OFFLAST_REG_OFF));
recv->len = read_reg(adapter, RIFFA_CHNL_REG(ch,
RIFFA_TX_LEN_REG_OFF));
/* Boundary checks. */
max_ptr = (uint32_t)((uintptr_t)recv->buf_addr
+ SUME_RIFFA_OFFSET(recv->offlast)
+ SUME_RIFFA_LEN(recv->len) - 1);
if (max_ptr <
(uint32_t)((uintptr_t)recv->buf_addr))
device_printf(dev, "receive buffer "
"wrap-around overflow.\n");
if (SUME_RIFFA_OFFSET(recv->offlast) +
SUME_RIFFA_LEN(recv->len) >
adapter->sg_buf_size)
device_printf(dev, "receive buffer too"
" small.\n");
/* Fill the bouncebuf "descriptor". */
sume_fill_bb_desc(adapter, recv,
SUME_RIFFA_LEN(recv->len));
bus_dmamap_sync(recv->ch_tag, recv->ch_map,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
write_reg(adapter, RIFFA_CHNL_REG(ch,
RIFFA_TX_SG_ADDR_LO_REG_OFF),
SUME_RIFFA_LO_ADDR(recv->buf_hw_addr));
write_reg(adapter, RIFFA_CHNL_REG(ch,
RIFFA_TX_SG_ADDR_HI_REG_OFF),
SUME_RIFFA_HI_ADDR(recv->buf_hw_addr));
write_reg(adapter, RIFFA_CHNL_REG(ch,
RIFFA_TX_SG_LEN_REG_OFF),
4 * recv->num_sg);
bus_dmamap_sync(recv->ch_tag, recv->ch_map,
BUS_DMASYNC_POSTREAD |
BUS_DMASYNC_POSTWRITE);
recv->state = SUME_RIFFA_CHAN_STATE_READY;
vect &= ~SUME_MSI_RXQUE;
break;
case SUME_RIFFA_CHAN_STATE_READY:
if (!(vect & SUME_MSI_RXBUF)) {
device_printf(dev, "ch %d unexpected "
"interrupt in recv+1 state %u: "
"vect = 0x%08x\n", ch, recv->state,
vect);
recv->recovery = 1;
break;
}
recv->state = SUME_RIFFA_CHAN_STATE_READ;
vect &= ~SUME_MSI_RXBUF;
break;
case SUME_RIFFA_CHAN_STATE_READ:
if (!(vect & SUME_MSI_RXDONE)) {
device_printf(dev, "ch %d unexpected "
"interrupt in recv+2 state %u: "
"vect = 0x%08x\n", ch, recv->state,
vect);
recv->recovery = 1;
break;
}
len = read_reg(adapter, RIFFA_CHNL_REG(ch,
RIFFA_TX_TNFR_LEN_REG_OFF));
/* Remember, len and recv->len are words. */
if (ch == SUME_RIFFA_CHANNEL_DATA) {
m = sume_rx_build_mbuf(adapter,
len << 2);
recv->state =
SUME_RIFFA_CHAN_STATE_IDLE;
} else if (ch == SUME_RIFFA_CHANNEL_REG)
wakeup(&recv->event);
else {
device_printf(dev, "ch %d unexpected "
"interrupt in recv+2 state %u: "
"vect = 0x%08x\n", ch, recv->state,
vect);
recv->recovery = 1;
}
vect &= ~SUME_MSI_RXDONE;
break;
case SUME_RIFFA_CHAN_STATE_LEN:
break;
default:
device_printf(dev, "unknown RX state!\n");
}
loops++;
}
if ((vect & (SUME_MSI_RXQUE | SUME_MSI_RXBUF |
SUME_MSI_RXDONE)) && recv->recovery) {
device_printf(dev, "ch %d ignoring vect = 0x%08x "
"during RX; not in recovery; state = %d, loops = "
"%d\n", ch, vect, recv->state, loops);
/* Clean the unfinished transaction. */
if (ch == SUME_RIFFA_CHANNEL_REG &&
vect & SUME_MSI_RXDONE) {
read_reg(adapter, RIFFA_CHNL_REG(ch,
RIFFA_TX_TNFR_LEN_REG_OFF));
recv->recovery = 0;
}
}
}
SUME_UNLOCK(adapter);
if (m != NULL) {
ifp = m->m_pkthdr.rcvif;
(*ifp->if_input)(ifp, m);
}
}
/*
* As we cannot disable interrupt generation, ignore early interrupts by waiting
* for the adapter to go into the 'running' state.
*/
static int
sume_intr_filter(void *arg)
{
struct sume_adapter *adapter = arg;
if (adapter->running == 0)
return (FILTER_STRAY);
return (FILTER_SCHEDULE_THREAD);
}
static int
sume_probe_riffa_pci(struct sume_adapter *adapter)
{
device_t dev = adapter->dev;
int error, count, capmem;
uint32_t reg, devctl, linkctl;
pci_enable_busmaster(dev);
adapter->rid = PCIR_BAR(0);
adapter->bar0_addr = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&adapter->rid, RF_ACTIVE);
if (adapter->bar0_addr == NULL) {
device_printf(dev, "unable to allocate bus resource: "
"BAR0 address\n");
return (ENXIO);
}
adapter->bt = rman_get_bustag(adapter->bar0_addr);
adapter->bh = rman_get_bushandle(adapter->bar0_addr);
adapter->bar0_len = rman_get_size(adapter->bar0_addr);
if (adapter->bar0_len != 1024) {
device_printf(dev, "BAR0 resource length %lu != 1024\n",
adapter->bar0_len);
return (ENXIO);
}
count = pci_msi_count(dev);
error = pci_alloc_msi(dev, &count);
if (error) {
device_printf(dev, "unable to allocate bus resource: PCI "
"MSI\n");
return (error);
}
adapter->irq.rid = 1; /* Should be 1, thus says pci_alloc_msi() */
adapter->irq.res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&adapter->irq.rid, RF_SHAREABLE | RF_ACTIVE);
if (adapter->irq.res == NULL) {
device_printf(dev, "unable to allocate bus resource: IRQ "
"memory\n");
return (ENXIO);
}
error = bus_setup_intr(dev, adapter->irq.res, INTR_MPSAFE |
INTR_TYPE_NET, sume_intr_filter, sume_intr_handler, adapter,
&adapter->irq.tag);
if (error) {
device_printf(dev, "failed to setup interrupt for rid %d, name"
" %s: %d\n", adapter->irq.rid, "SUME_INTR", error);
return (ENXIO);
}
if (pci_find_cap(dev, PCIY_EXPRESS, &capmem) != 0) {
device_printf(dev, "PCI not PCIe capable\n");
return (ENXIO);
}
devctl = pci_read_config(dev, capmem + PCIER_DEVICE_CTL, 2);
pci_write_config(dev, capmem + PCIER_DEVICE_CTL, (devctl |
PCIEM_CTL_EXT_TAG_FIELD), 2);
devctl = pci_read_config(dev, capmem + PCIER_DEVICE_CTL2, 2);
pci_write_config(dev, capmem + PCIER_DEVICE_CTL2, (devctl |
PCIEM_CTL2_ID_ORDERED_REQ_EN), 2);
linkctl = pci_read_config(dev, capmem + PCIER_LINK_CTL, 2);
pci_write_config(dev, capmem + PCIER_LINK_CTL, (linkctl |
PCIEM_LINK_CTL_RCB), 2);
reg = read_reg(adapter, RIFFA_INFO_REG_OFF);
adapter->num_sg = RIFFA_SG_ELEMS * ((reg >> 19) & 0xf);
adapter->sg_buf_size = RIFFA_SG_BUF_SIZE * ((reg >> 19) & 0xf);
error = ENODEV;
/* Check bus master is enabled. */
if (((reg >> 4) & 0x1) != 1) {
device_printf(dev, "bus master not enabled: %d\n",
(reg >> 4) & 0x1);
return (error);
}
/* Check link parameters are valid. */
if (((reg >> 5) & 0x3f) == 0 || ((reg >> 11) & 0x3) == 0) {
device_printf(dev, "link parameters not valid: %d %d\n",
(reg >> 5) & 0x3f, (reg >> 11) & 0x3);
return (error);
}
/* Check # of channels are within valid range. */
if ((reg & 0xf) == 0 || (reg & 0xf) > RIFFA_MAX_CHNLS) {
device_printf(dev, "number of channels out of range: %d\n",
reg & 0xf);
return (error);
}
/* Check bus width. */
if (((reg >> 19) & 0xf) == 0 ||
((reg >> 19) & 0xf) > RIFFA_MAX_BUS_WIDTH_PARAM) {
device_printf(dev, "bus width out of range: %d\n",
(reg >> 19) & 0xf);
return (error);
}
device_printf(dev, "[riffa] # of channels: %d\n",
reg & 0xf);
device_printf(dev, "[riffa] bus interface width: %d\n",
((reg >> 19) & 0xf) << 5);
device_printf(dev, "[riffa] bus master enabled: %d\n",
(reg >> 4) & 0x1);
device_printf(dev, "[riffa] negotiated link width: %d\n",
(reg >> 5) & 0x3f);
device_printf(dev, "[riffa] negotiated rate width: %d MTs\n",
((reg >> 11) & 0x3) * 2500);
device_printf(dev, "[riffa] max downstream payload: %d B\n",
128 << ((reg >> 13) & 0x7));
device_printf(dev, "[riffa] max upstream payload: %d B\n",
128 << ((reg >> 16) & 0x7));
return (0);
}
/* If there is no sume_if_init, the ether_ioctl panics. */
static void
sume_if_init(void *sc)
{
}
/* Write the address and length for our incoming / outgoing transaction. */
static void
sume_fill_bb_desc(struct sume_adapter *adapter, struct riffa_chnl_dir *p,
uint64_t len)
{
struct nf_bb_desc *bouncebuf = (struct nf_bb_desc *) p->buf_addr;
bouncebuf->lower = (p->buf_hw_addr + sizeof(struct nf_bb_desc));
bouncebuf->upper = (p->buf_hw_addr + sizeof(struct nf_bb_desc)) >> 32;
bouncebuf->len = len >> 2;
}
/* Module register locked write. */
static int
sume_modreg_write_locked(struct sume_adapter *adapter)
{
struct riffa_chnl_dir *send = adapter->send[SUME_RIFFA_CHANNEL_REG];
/* Let the FPGA know about the transfer. */
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_REG,
RIFFA_RX_OFFLAST_REG_OFF), SUME_OFFLAST);
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_REG,
RIFFA_RX_LEN_REG_OFF), send->len); /* words */
/* Fill the bouncebuf "descriptor". */
sume_fill_bb_desc(adapter, send, SUME_RIFFA_LEN(send->len));
/* Update the state before intiating the DMA to avoid races. */
send->state = SUME_RIFFA_CHAN_STATE_READY;
bus_dmamap_sync(send->ch_tag, send->ch_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* DMA. */
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_REG,
RIFFA_RX_SG_ADDR_LO_REG_OFF),
SUME_RIFFA_LO_ADDR(send->buf_hw_addr));
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_REG,
RIFFA_RX_SG_ADDR_HI_REG_OFF),
SUME_RIFFA_HI_ADDR(send->buf_hw_addr));
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_REG,
RIFFA_RX_SG_LEN_REG_OFF), 4 * send->num_sg);
bus_dmamap_sync(send->ch_tag, send->ch_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
return (0);
}
/*
* Request a register read or write (depending on optype).
* If optype is set (0x1f) this will result in a register write,
* otherwise this will result in a register read request at the given
* address and the result will need to be DMAed back.
*/
static int
sume_module_reg_write(struct nf_priv *nf_priv, struct sume_ifreq *sifr,
uint32_t optype)
{
struct sume_adapter *adapter = nf_priv->adapter;
struct riffa_chnl_dir *send = adapter->send[SUME_RIFFA_CHANNEL_REG];
struct nf_regop_data *data;
int error;
/*
* 1. Make sure the channel is free; otherwise return EBUSY.
* 2. Prepare the memory in the bounce buffer (which we always
* use for regs).
* 3. Start the DMA process.
* 4. Sleep and wait for result and return success or error.
*/
SUME_LOCK(adapter);
if (send->state != SUME_RIFFA_CHAN_STATE_IDLE) {
SUME_UNLOCK(adapter);
return (EBUSY);
}
data = (struct nf_regop_data *) (send->buf_addr +
sizeof(struct nf_bb_desc));
data->addr = htole32(sifr->addr);
data->val = htole32(sifr->val);
/* Tag to indentify request. */
data->rtag = htole32(++send->rtag);
data->optype = htole32(optype);
send->len = sizeof(struct nf_regop_data) / 4; /* words */
error = sume_modreg_write_locked(adapter);
if (error) {
SUME_UNLOCK(adapter);
return (EFAULT);
}
/* Timeout after 1s. */
if (send->state != SUME_RIFFA_CHAN_STATE_LEN)
error = msleep(&send->event, &adapter->lock, 0,
"Waiting recv finish", 1 * hz);
/* This was a write so we are done; were interrupted, or timed out. */
if (optype != SUME_MR_READ || error != 0 || error == EWOULDBLOCK) {
send->state = SUME_RIFFA_CHAN_STATE_IDLE;
if (optype == SUME_MR_READ)
error = EWOULDBLOCK;
else
error = 0;
} else
error = 0;
/*
* For read requests we will update state once we are done
* having read the result to avoid any two outstanding
* transactions, or we need a queue and validate tags,
* which is a lot of work for a low priority, infrequent
* event.
*/
SUME_UNLOCK(adapter);
return (error);
}
/* Module register read. */
static int
sume_module_reg_read(struct nf_priv *nf_priv, struct sume_ifreq *sifr)
{
struct sume_adapter *adapter = nf_priv->adapter;
struct riffa_chnl_dir *recv = adapter->recv[SUME_RIFFA_CHANNEL_REG];
struct riffa_chnl_dir *send = adapter->send[SUME_RIFFA_CHANNEL_REG];
struct nf_regop_data *data;
int error = 0;
/*
* 0. Sleep waiting for result if needed (unless condition is
* true already).
* 1. Read DMA results.
* 2. Update state on *TX* to IDLE to allow next read to start.
*/
SUME_LOCK(adapter);
bus_dmamap_sync(recv->ch_tag, recv->ch_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/*
* We only need to be woken up at the end of the transaction.
* Timeout after 1s.
*/
if (recv->state != SUME_RIFFA_CHAN_STATE_READ)
error = msleep(&recv->event, &adapter->lock, 0,
"Waiting transaction finish", 1 * hz);
if (recv->state != SUME_RIFFA_CHAN_STATE_READ || error == EWOULDBLOCK) {
SUME_UNLOCK(adapter);
device_printf(adapter->dev, "wait error: %d\n", error);
return (EWOULDBLOCK);
}
bus_dmamap_sync(recv->ch_tag, recv->ch_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/*
* Read reply data and validate address and tag.
* Note: we do access the send side without lock but the state
* machine does prevent the data from changing.
*/
data = (struct nf_regop_data *) (recv->buf_addr +
sizeof(struct nf_bb_desc));
if (le32toh(data->rtag) != send->rtag)
device_printf(adapter->dev, "rtag error: 0x%08x 0x%08x\n",
le32toh(data->rtag), send->rtag);
sifr->val = le32toh(data->val);
recv->state = SUME_RIFFA_CHAN_STATE_IDLE;
/* We are done. */
send->state = SUME_RIFFA_CHAN_STATE_IDLE;
SUME_UNLOCK(adapter);
return (0);
}
/* Read value from a module register and return it to a sume_ifreq. */
static int
get_modreg_value(struct nf_priv *nf_priv, struct sume_ifreq *sifr)
{
int error;
error = sume_module_reg_write(nf_priv, sifr, SUME_MR_READ);
if (!error)
error = sume_module_reg_read(nf_priv, sifr);
return (error);
}
static int
sume_if_ioctl(struct ifnet *ifp, unsigned long cmd, caddr_t data)
{
struct ifreq *ifr = (struct ifreq *) data;
struct nf_priv *nf_priv = ifp->if_softc;
struct sume_ifreq sifr;
int error = 0;
switch (cmd) {
case SIOCGIFMEDIA:
case SIOCGIFXMEDIA:
error = ifmedia_ioctl(ifp, ifr, &nf_priv->media, cmd);
break;
case SUME_IOCTL_CMD_WRITE_REG:
error = copyin(ifr_data_get_ptr(ifr), &sifr, sizeof(sifr));
if (error) {
error = EINVAL;
break;
}
error = sume_module_reg_write(nf_priv, &sifr, SUME_MR_WRITE);
break;
case SUME_IOCTL_CMD_READ_REG:
error = copyin(ifr_data_get_ptr(ifr), &sifr, sizeof(sifr));
if (error) {
error = EINVAL;
break;
}
error = get_modreg_value(nf_priv, &sifr);
if (error)
break;
error = copyout(&sifr, ifr_data_get_ptr(ifr), sizeof(sifr));
if (error)
error = EINVAL;
break;
case SIOCSIFFLAGS:
/* Silence tcpdump 'promisc mode not supported' warning. */
if (ifp->if_flags & IFF_PROMISC)
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
return (error);
}
static int
sume_media_change(struct ifnet *ifp)
{
struct nf_priv *nf_priv = ifp->if_softc;
struct ifmedia *ifm = &nf_priv->media;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return (EINVAL);
if (IFM_SUBTYPE(ifm->ifm_media) == IFM_10G_SR)
ifp->if_baudrate = ifmedia_baudrate(IFM_ETHER | IFM_10G_SR);
else
ifp->if_baudrate = ifmedia_baudrate(ifm->ifm_media);
return (0);
}
static void
sume_update_link_status(struct ifnet *ifp)
{
struct nf_priv *nf_priv = ifp->if_softc;
struct sume_adapter *adapter = nf_priv->adapter;
struct sume_ifreq sifr;
int link_status;
sifr.addr = SUME_STATUS_ADDR(nf_priv->port);
sifr.val = 0;
if (get_modreg_value(nf_priv, &sifr))
return;
link_status = SUME_LINK_STATUS(sifr.val);
if (!link_status && nf_priv->link_up) {
if_link_state_change(ifp, LINK_STATE_DOWN);
nf_priv->link_up = 0;
if (adapter->sume_debug)
device_printf(adapter->dev, "port %d link state "
"changed to DOWN\n", nf_priv->unit);
} else if (link_status && !nf_priv->link_up) {
nf_priv->link_up = 1;
if_link_state_change(ifp, LINK_STATE_UP);
if (adapter->sume_debug)
device_printf(adapter->dev, "port %d link state "
"changed to UP\n", nf_priv->unit);
}
}
static void
sume_media_status(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct nf_priv *nf_priv = ifp->if_softc;
struct ifmedia *ifm = &nf_priv->media;
if (ifm->ifm_cur->ifm_media == (IFM_ETHER | IFM_10G_SR) &&
(ifp->if_flags & IFF_UP))
ifmr->ifm_active = IFM_ETHER | IFM_10G_SR;
else
ifmr->ifm_active = ifm->ifm_cur->ifm_media;
ifmr->ifm_status |= IFM_AVALID;
sume_update_link_status(ifp);
if (nf_priv->link_up)
ifmr->ifm_status |= IFM_ACTIVE;
}
/*
* Packet to transmit. We take the packet data from the mbuf and copy it to the
* bouncebuffer address buf_addr+3*sizeof(uint32_t)+16. The 16 bytes before the
* packet data are for metadata: sport/dport (depending on our source
* interface), packet length and magic 0xcafe. We tell the SUME about the
* transfer, fill the first 3*sizeof(uint32_t) bytes of the bouncebuffer with
* the information about the start and length of the packet and trigger the
* transaction.
*/
static int
sume_if_start_locked(struct ifnet *ifp)
{
struct mbuf *m;
struct nf_priv *nf_priv = ifp->if_softc;
struct sume_adapter *adapter = nf_priv->adapter;
struct riffa_chnl_dir *send = adapter->send[SUME_RIFFA_CHANNEL_DATA];
uint8_t *outbuf;
struct nf_metadata *mdata;
int plen = SUME_MIN_PKT_SIZE;
KASSERT(mtx_owned(&adapter->lock), ("SUME lock not owned"));
KASSERT(send->state == SUME_RIFFA_CHAN_STATE_IDLE,
("SUME not in IDLE state"));
IFQ_DEQUEUE(&ifp->if_snd, m);
if (m == NULL)
return (EINVAL);
/* Packets large enough do not need to be padded */
if (m->m_pkthdr.len > SUME_MIN_PKT_SIZE)
plen = m->m_pkthdr.len;
if (adapter->sume_debug)
device_printf(adapter->dev, "sending %d bytes to %s%d\n", plen,
SUME_ETH_DEVICE_NAME, nf_priv->unit);
outbuf = (uint8_t *) send->buf_addr + sizeof(struct nf_bb_desc);
mdata = (struct nf_metadata *) outbuf;
/* Clear the recovery flag. */
send->recovery = 0;
/* Make sure we fit with the 16 bytes nf_metadata. */
if (m->m_pkthdr.len + sizeof(struct nf_metadata) >
adapter->sg_buf_size) {
device_printf(adapter->dev, "packet too big for bounce buffer "
"(%d)\n", m->m_pkthdr.len);
m_freem(m);
nf_priv->stats.tx_dropped++;
return (ENOMEM);
}
bus_dmamap_sync(send->ch_tag, send->ch_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Zero out the padded data */
if (m->m_pkthdr.len < SUME_MIN_PKT_SIZE)
bzero(outbuf + sizeof(struct nf_metadata), SUME_MIN_PKT_SIZE);
/* Skip the first 16 bytes for the metadata. */
m_copydata(m, 0, m->m_pkthdr.len, outbuf + sizeof(struct nf_metadata));
send->len = (sizeof(struct nf_metadata) + plen + 3) / 4;
/* Fill in the metadata: CPU(DMA) ports are odd, MAC ports are even. */
mdata->sport = htole16(1 << (nf_priv->port * 2 + 1));
mdata->dport = htole16(1 << (nf_priv->port * 2));
mdata->plen = htole16(plen);
mdata->magic = htole16(SUME_RIFFA_MAGIC);
mdata->t1 = htole32(0);
mdata->t2 = htole32(0);
/* Let the FPGA know about the transfer. */
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_DATA,
RIFFA_RX_OFFLAST_REG_OFF), SUME_OFFLAST);
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_DATA,
RIFFA_RX_LEN_REG_OFF), send->len);
/* Fill the bouncebuf "descriptor". */
sume_fill_bb_desc(adapter, send, SUME_RIFFA_LEN(send->len));
/* Update the state before intiating the DMA to avoid races. */
send->state = SUME_RIFFA_CHAN_STATE_READY;
/* DMA. */
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_DATA,
RIFFA_RX_SG_ADDR_LO_REG_OFF),
SUME_RIFFA_LO_ADDR(send->buf_hw_addr));
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_DATA,
RIFFA_RX_SG_ADDR_HI_REG_OFF),
SUME_RIFFA_HI_ADDR(send->buf_hw_addr));
write_reg(adapter, RIFFA_CHNL_REG(SUME_RIFFA_CHANNEL_DATA,
RIFFA_RX_SG_LEN_REG_OFF), 4 * send->num_sg);
bus_dmamap_sync(send->ch_tag, send->ch_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
nf_priv->stats.tx_packets++;
nf_priv->stats.tx_bytes += plen;
/* We can free as long as we use the bounce buffer. */
m_freem(m);
adapter->last_ifc = nf_priv->port;
/* Reset watchdog counter. */
adapter->wd_counter = 0;
return (0);
}
static void
sume_if_start(struct ifnet *ifp)
{
struct nf_priv *nf_priv = ifp->if_softc;
struct sume_adapter *adapter = nf_priv->adapter;
if (!adapter->running || !(ifp->if_flags & IFF_UP))
return;
SUME_LOCK(adapter);
if (adapter->send[SUME_RIFFA_CHANNEL_DATA]->state ==
SUME_RIFFA_CHAN_STATE_IDLE)
sume_if_start_locked(ifp);
SUME_UNLOCK(adapter);
}
/*
* We call this function at the end of every TX transaction to check for
* remaining packets in the TX queues for every UP interface.
*/
static void
check_tx_queues(struct sume_adapter *adapter)
{
int i, last_ifc;
KASSERT(mtx_owned(&adapter->lock), ("SUME lock not owned"));
last_ifc = adapter->last_ifc;
/* Check all interfaces */
for (i = last_ifc + 1; i < last_ifc + SUME_NPORTS + 1; i++) {
struct ifnet *ifp = adapter->ifp[i % SUME_NPORTS];
if (!(ifp->if_flags & IFF_UP))
continue;
if (!sume_if_start_locked(ifp))
break;
}
}
static int
sume_ifp_alloc(struct sume_adapter *adapter, uint32_t port)
{
struct ifnet *ifp;
struct nf_priv *nf_priv = malloc(sizeof(struct nf_priv), M_SUME,
M_ZERO | M_WAITOK);
ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(adapter->dev, "cannot allocate ifnet\n");
return (ENOMEM);
}
adapter->ifp[port] = ifp;
ifp->if_softc = nf_priv;
nf_priv->adapter = adapter;
nf_priv->unit = alloc_unr(unr);
nf_priv->port = port;
nf_priv->link_up = 0;
if_initname(ifp, SUME_ETH_DEVICE_NAME, nf_priv->unit);
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_init = sume_if_init;
ifp->if_start = sume_if_start;
ifp->if_ioctl = sume_if_ioctl;
uint8_t hw_addr[ETHER_ADDR_LEN] = DEFAULT_ETHER_ADDRESS;
hw_addr[ETHER_ADDR_LEN-1] = nf_priv->unit;
ether_ifattach(ifp, hw_addr);
ifmedia_init(&nf_priv->media, IFM_IMASK, sume_media_change,
sume_media_status);
ifmedia_add(&nf_priv->media, IFM_ETHER | IFM_10G_SR, 0, NULL);
ifmedia_set(&nf_priv->media, IFM_ETHER | IFM_10G_SR);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
return (0);
}
static void
callback_dma(void *arg, bus_dma_segment_t *segs, int nseg, int err)
{
if (err)
return;
KASSERT(nseg == 1, ("%d segments returned!", nseg));
*(bus_addr_t *) arg = segs[0].ds_addr;
}
static int
sume_probe_riffa_buffer(const struct sume_adapter *adapter,
struct riffa_chnl_dir ***p, const char *dir)
{
struct riffa_chnl_dir **rp;
bus_addr_t hw_addr;
int error, ch;
device_t dev = adapter->dev;
error = ENOMEM;
*p = malloc(SUME_RIFFA_CHANNELS * sizeof(struct riffa_chnl_dir *),
M_SUME, M_ZERO | M_WAITOK);
if (*p == NULL) {
device_printf(dev, "malloc(%s) failed.\n", dir);
return (error);
}
rp = *p;
/* Allocate the chnl_dir structs themselves. */
for (ch = 0; ch < SUME_RIFFA_CHANNELS; ch++) {
/* One direction. */
rp[ch] = malloc(sizeof(struct riffa_chnl_dir), M_SUME,
M_ZERO | M_WAITOK);
if (rp[ch] == NULL) {
device_printf(dev, "malloc(%s[%d]) riffa_chnl_dir "
"failed.\n", dir, ch);
return (error);
}
int err = bus_dma_tag_create(bus_get_dma_tag(dev),
4, 0,
BUS_SPACE_MAXADDR,
BUS_SPACE_MAXADDR,
NULL, NULL,
adapter->sg_buf_size,
1,
adapter->sg_buf_size,
0,
NULL,
NULL,
&rp[ch]->ch_tag);
if (err) {
device_printf(dev, "bus_dma_tag_create(%s[%d]) "
"failed.\n", dir, ch);
return (err);
}
err = bus_dmamem_alloc(rp[ch]->ch_tag, (void **)
&rp[ch]->buf_addr, BUS_DMA_WAITOK | BUS_DMA_COHERENT |
BUS_DMA_ZERO, &rp[ch]->ch_map);
if (err) {
device_printf(dev, "bus_dmamem_alloc(%s[%d]) failed.\n",
dir, ch);
return (err);
}
bzero(rp[ch]->buf_addr, adapter->sg_buf_size);
err = bus_dmamap_load(rp[ch]->ch_tag, rp[ch]->ch_map,
rp[ch]->buf_addr, adapter->sg_buf_size, callback_dma,
&hw_addr, BUS_DMA_NOWAIT);
if (err) {
device_printf(dev, "bus_dmamap_load(%s[%d]) failed.\n",
dir, ch);
return (err);
}
rp[ch]->buf_hw_addr = hw_addr;
rp[ch]->num_sg = 1;
rp[ch]->state = SUME_RIFFA_CHAN_STATE_IDLE;
rp[ch]->rtag = SUME_INIT_RTAG;
}
return (0);
}
static int
sume_probe_riffa_buffers(struct sume_adapter *adapter)
{
int error;
error = sume_probe_riffa_buffer(adapter, &adapter->recv, "recv");
if (error)
return (error);
error = sume_probe_riffa_buffer(adapter, &adapter->send, "send");
return (error);
}
static void
sume_sysctl_init(struct sume_adapter *adapter)
{
device_t dev = adapter->dev;
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
struct sysctl_oid_list *child = SYSCTL_CHILDREN(tree);
struct sysctl_oid *tmp_tree;
char namebuf[MAX_IFC_NAME_LEN];
int i;
tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "sume", CTLFLAG_RW,
0, "SUME top-level tree");
if (tree == NULL) {
device_printf(dev, "SYSCTL_ADD_NODE failed.\n");
return;
}
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "debug", CTLFLAG_RW,
&adapter->sume_debug, 0, "debug int leaf");
/* total RX error stats */
SYSCTL_ADD_U64(ctx, child, OID_AUTO, "rx_epkts",
CTLFLAG_RD, &adapter->packets_err, 0, "rx errors");
SYSCTL_ADD_U64(ctx, child, OID_AUTO, "rx_ebytes",
CTLFLAG_RD, &adapter->bytes_err, 0, "rx error bytes");
for (i = SUME_NPORTS - 1; i >= 0; i--) {
struct ifnet *ifp = adapter->ifp[i];
if (ifp == NULL)
continue;
struct nf_priv *nf_priv = ifp->if_softc;
snprintf(namebuf, MAX_IFC_NAME_LEN, "%s%d",
SUME_ETH_DEVICE_NAME, nf_priv->unit);
tmp_tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
CTLFLAG_RW, 0, "SUME ifc tree");
if (tmp_tree == NULL) {
device_printf(dev, "SYSCTL_ADD_NODE failed.\n");
return;
}
/* Packets dropped by down interface. */
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"ifc_down_bytes", CTLFLAG_RD,
&nf_priv->stats.ifc_down_bytes, 0, "ifc_down bytes");
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"ifc_down_packets", CTLFLAG_RD,
&nf_priv->stats.ifc_down_packets, 0, "ifc_down packets");
/* HW RX stats */
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"hw_rx_packets", CTLFLAG_RD, &nf_priv->stats.hw_rx_packets,
0, "hw_rx packets");
/* HW TX stats */
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"hw_tx_packets", CTLFLAG_RD, &nf_priv->stats.hw_tx_packets,
0, "hw_tx packets");
/* RX stats */
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"rx_bytes", CTLFLAG_RD, &nf_priv->stats.rx_bytes, 0,
"rx bytes");
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"rx_dropped", CTLFLAG_RD, &nf_priv->stats.rx_dropped, 0,
"rx dropped");
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"rx_packets", CTLFLAG_RD, &nf_priv->stats.rx_packets, 0,
"rx packets");
/* TX stats */
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"tx_bytes", CTLFLAG_RD, &nf_priv->stats.tx_bytes, 0,
"tx bytes");
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"tx_dropped", CTLFLAG_RD, &nf_priv->stats.tx_dropped, 0,
"tx dropped");
SYSCTL_ADD_U64(ctx, SYSCTL_CHILDREN(tmp_tree), OID_AUTO,
"tx_packets", CTLFLAG_RD, &nf_priv->stats.tx_packets, 0,
"tx packets");
}
}
static void
sume_local_timer(void *arg)
{
struct sume_adapter *adapter = arg;
if (!adapter->running)
return;
taskqueue_enqueue(adapter->tq, &adapter->stat_task);
SUME_LOCK(adapter);
if (adapter->send[SUME_RIFFA_CHANNEL_DATA]->state !=
SUME_RIFFA_CHAN_STATE_IDLE && ++adapter->wd_counter >= 3) {
/* Resetting interfaces if stuck for 3 seconds. */
device_printf(adapter->dev, "TX stuck, resetting adapter.\n");
read_reg(adapter, RIFFA_INFO_REG_OFF);
adapter->send[SUME_RIFFA_CHANNEL_DATA]->state =
SUME_RIFFA_CHAN_STATE_IDLE;
adapter->wd_counter = 0;
check_tx_queues(adapter);
}
SUME_UNLOCK(adapter);
callout_reset(&adapter->timer, 1 * hz, sume_local_timer, adapter);
}
static void
sume_get_stats(void *context, int pending)
{
struct sume_adapter *adapter = context;
int i;
for (i = 0; i < SUME_NPORTS; i++) {
struct ifnet *ifp = adapter->ifp[i];
if (ifp->if_flags & IFF_UP) {
struct nf_priv *nf_priv = ifp->if_softc;
struct sume_ifreq sifr;
sume_update_link_status(ifp);
/* Get RX counter. */
sifr.addr = SUME_STAT_RX_ADDR(nf_priv->port);
sifr.val = 0;
if (!get_modreg_value(nf_priv, &sifr))
nf_priv->stats.hw_rx_packets += sifr.val;
/* Get TX counter. */
sifr.addr = SUME_STAT_TX_ADDR(nf_priv->port);
sifr.val = 0;
if (!get_modreg_value(nf_priv, &sifr))
nf_priv->stats.hw_tx_packets += sifr.val;
}
}
}
static int
sume_attach(device_t dev)
{
struct sume_adapter *adapter = device_get_softc(dev);
adapter->dev = dev;
int error, i;
mtx_init(&adapter->lock, "Global lock", NULL, MTX_DEF);
adapter->running = 0;
/* OK finish up RIFFA. */
error = sume_probe_riffa_pci(adapter);
if (error != 0)
goto error;
error = sume_probe_riffa_buffers(adapter);
if (error != 0)
goto error;
/* Now do the network interfaces. */
for (i = 0; i < SUME_NPORTS; i++) {
error = sume_ifp_alloc(adapter, i);
if (error != 0)
goto error;
}
/* Register stats and register sysctls. */
sume_sysctl_init(adapter);
/* Reset the HW. */
read_reg(adapter, RIFFA_INFO_REG_OFF);
/* Ready to go, "enable" IRQ. */
adapter->running = 1;
callout_init(&adapter->timer, 1);
TASK_INIT(&adapter->stat_task, 0, sume_get_stats, adapter);
adapter->tq = taskqueue_create("sume_stats", M_NOWAIT,
taskqueue_thread_enqueue, &adapter->tq);
taskqueue_start_threads(&adapter->tq, 1, PI_NET, "%s stattaskq",
device_get_nameunit(adapter->dev));
callout_reset(&adapter->timer, 1 * hz, sume_local_timer, adapter);
return (0);
error:
sume_detach(dev);
return (error);
}
static void
sume_remove_riffa_buffer(const struct sume_adapter *adapter,
struct riffa_chnl_dir **pp)
{
int ch;
for (ch = 0; ch < SUME_RIFFA_CHANNELS; ch++) {
if (pp[ch] == NULL)
continue;
if (pp[ch]->buf_hw_addr != 0) {
bus_dmamem_free(pp[ch]->ch_tag, pp[ch]->buf_addr,
pp[ch]->ch_map);
pp[ch]->buf_hw_addr = 0;
}
free(pp[ch], M_SUME);
}
}
static void
sume_remove_riffa_buffers(struct sume_adapter *adapter)
{
if (adapter->send != NULL) {
sume_remove_riffa_buffer(adapter, adapter->send);
free(adapter->send, M_SUME);
adapter->send = NULL;
}
if (adapter->recv != NULL) {
sume_remove_riffa_buffer(adapter, adapter->recv);
free(adapter->recv, M_SUME);
adapter->recv = NULL;
}
}
static int
sume_detach(device_t dev)
{
struct sume_adapter *adapter = device_get_softc(dev);
int i;
struct nf_priv *nf_priv;
KASSERT(mtx_initialized(&adapter->lock), ("SUME mutex not "
"initialized"));
adapter->running = 0;
/* Drain the stats callout and task queue. */
callout_drain(&adapter->timer);
if (adapter->tq) {
taskqueue_drain(adapter->tq, &adapter->stat_task);
taskqueue_free(adapter->tq);
}
for (i = 0; i < SUME_NPORTS; i++) {
struct ifnet *ifp = adapter->ifp[i];
if (ifp == NULL)
continue;
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
nf_priv = ifp->if_softc;
if (ifp->if_flags & IFF_UP)
if_down(ifp);
ifmedia_removeall(&nf_priv->media);
free_unr(unr, nf_priv->unit);
ifp->if_flags &= ~IFF_UP;
ether_ifdetach(ifp);
if_free(ifp);
free(nf_priv, M_SUME);
}
sume_remove_riffa_buffers(adapter);
if (adapter->irq.tag)
bus_teardown_intr(dev, adapter->irq.res, adapter->irq.tag);
if (adapter->irq.res)
bus_release_resource(dev, SYS_RES_IRQ, adapter->irq.rid,
adapter->irq.res);
pci_release_msi(dev);
if (adapter->bar0_addr)
bus_release_resource(dev, SYS_RES_MEMORY, adapter->rid,
adapter->bar0_addr);
mtx_destroy(&adapter->lock);
return (0);
}
static int
mod_event(module_t mod, int cmd, void *arg)
{
switch (cmd) {
case MOD_LOAD:
unr = new_unrhdr(0, INT_MAX, NULL);
break;
case MOD_UNLOAD:
delete_unrhdr(unr);
break;
}
return (0);
}
static devclass_t sume_devclass;
DRIVER_MODULE(sume, pci, sume_driver, sume_devclass, mod_event, 0);
MODULE_VERSION(sume, 1);
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