1103 lines
32 KiB
C
1103 lines
32 KiB
C
/*-
|
|
* Copyright (c) 2006 Sam Leffler, Errno Consulting
|
|
* 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,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
|
|
* redistribution must be conditioned upon including a substantially
|
|
* similar Disclaimer requirement for further binary redistribution.
|
|
*
|
|
* NO WARRANTY
|
|
* 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 NONINFRINGEMENT, MERCHANTIBILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
|
|
*/
|
|
|
|
/*-
|
|
* Copyright (c) 2001-2005, Intel 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.
|
|
* 3. Neither the name of the Intel Corporation nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
*
|
|
* 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("$FreeBSD$");
|
|
|
|
/*
|
|
* Intel XScale Queue Manager support.
|
|
*
|
|
* Each IXP4XXX device has a hardware block that implements a priority
|
|
* queue manager that is shared between the XScale cpu and the backend
|
|
* devices (such as the NPE). Queues are accessed by reading/writing
|
|
* special memory locations. The queue contents are mapped into a shared
|
|
* SRAM region with entries managed in a circular buffer. The XScale
|
|
* processor can receive interrupts based on queue contents (a condition
|
|
* code determines when interrupts should be delivered).
|
|
*
|
|
* The code here basically replaces the qmgr class in the Intel Access
|
|
* Library (IAL).
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/time.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/resource.h>
|
|
#include <machine/intr.h>
|
|
#include <arm/xscale/ixp425/ixp425reg.h>
|
|
#include <arm/xscale/ixp425/ixp425var.h>
|
|
|
|
#include <arm/xscale/ixp425/ixp425_qmgr.h>
|
|
|
|
/*
|
|
* State per AQM hw queue.
|
|
* This structure holds q configuration and dispatch state.
|
|
*/
|
|
struct qmgrInfo {
|
|
int qSizeInWords; /* queue size in words */
|
|
|
|
uint32_t qOflowStatBitMask; /* overflow status mask */
|
|
int qWriteCount; /* queue write count */
|
|
|
|
bus_size_t qAccRegAddr; /* access register */
|
|
bus_size_t qUOStatRegAddr; /* status register */
|
|
bus_size_t qConfigRegAddr; /* config register */
|
|
int qSizeInEntries; /* queue size in entries */
|
|
|
|
uint32_t qUflowStatBitMask; /* underflow status mask */
|
|
int qReadCount; /* queue read count */
|
|
|
|
/* XXX union */
|
|
uint32_t qStatRegAddr;
|
|
uint32_t qStatBitsOffset;
|
|
uint32_t qStat0BitMask;
|
|
uint32_t qStat1BitMask;
|
|
|
|
uint32_t intRegCheckMask; /* interrupt reg check mask */
|
|
void (*cb)(int, void *); /* callback function */
|
|
void *cbarg; /* callback argument */
|
|
int priority; /* dispatch priority */
|
|
#if 0
|
|
/* NB: needed only for A0 parts */
|
|
u_int statusWordOffset; /* status word offset */
|
|
uint32_t statusMask; /* status mask */
|
|
uint32_t statusCheckValue; /* status check value */
|
|
#endif
|
|
};
|
|
|
|
struct ixpqmgr_softc {
|
|
device_t sc_dev;
|
|
bus_space_tag_t sc_iot;
|
|
bus_space_handle_t sc_ioh;
|
|
|
|
struct resource *sc_irq1; /* IRQ resource */
|
|
void *sc_ih1; /* interrupt handler */
|
|
int sc_rid1; /* resource id for irq */
|
|
|
|
struct resource *sc_irq2;
|
|
void *sc_ih2;
|
|
int sc_rid2;
|
|
|
|
struct qmgrInfo qinfo[IX_QMGR_MAX_NUM_QUEUES];
|
|
/*
|
|
* This array contains a list of queue identifiers ordered by
|
|
* priority. The table is split logically between queue
|
|
* identifiers 0-31 and 32-63. To optimize lookups bit masks
|
|
* are kept for the first-32 and last-32 q's. When the
|
|
* table needs to be rebuilt mark rebuildTable and it'll
|
|
* happen after the next interrupt.
|
|
*/
|
|
int priorityTable[IX_QMGR_MAX_NUM_QUEUES];
|
|
uint32_t lowPriorityTableFirstHalfMask;
|
|
uint32_t uppPriorityTableFirstHalfMask;
|
|
int rebuildTable; /* rebuild priorityTable */
|
|
|
|
uint32_t aqmFreeSramAddress; /* SRAM free space */
|
|
};
|
|
|
|
static int qmgr_debug;
|
|
SYSCTL_INT(_debug, OID_AUTO, qmgr, CTLFLAG_RWTUN, &qmgr_debug,
|
|
0, "IXP4XX Q-Manager debug msgs");
|
|
#define DPRINTF(dev, fmt, ...) do { \
|
|
if (qmgr_debug) printf(fmt, __VA_ARGS__); \
|
|
} while (0)
|
|
#define DPRINTFn(n, dev, fmt, ...) do { \
|
|
if (qmgr_debug >= n) printf(fmt, __VA_ARGS__); \
|
|
} while (0)
|
|
|
|
static struct ixpqmgr_softc *ixpqmgr_sc = NULL;
|
|
|
|
static void ixpqmgr_rebuild(struct ixpqmgr_softc *);
|
|
static void ixpqmgr_intr(void *);
|
|
|
|
static void aqm_int_enable(struct ixpqmgr_softc *sc, int qId);
|
|
static void aqm_int_disable(struct ixpqmgr_softc *sc, int qId);
|
|
static void aqm_qcfg(struct ixpqmgr_softc *sc, int qId, u_int ne, u_int nf);
|
|
static void aqm_srcsel_write(struct ixpqmgr_softc *sc, int qId, int sourceId);
|
|
static void aqm_reset(struct ixpqmgr_softc *sc);
|
|
|
|
static void
|
|
dummyCallback(int qId, void *arg)
|
|
{
|
|
/* XXX complain */
|
|
}
|
|
|
|
static uint32_t
|
|
aqm_reg_read(struct ixpqmgr_softc *sc, bus_size_t off)
|
|
{
|
|
DPRINTFn(9, sc->sc_dev, "%s(0x%x)\n", __func__, (int)off);
|
|
return bus_space_read_4(sc->sc_iot, sc->sc_ioh, off);
|
|
}
|
|
|
|
static void
|
|
aqm_reg_write(struct ixpqmgr_softc *sc, bus_size_t off, uint32_t val)
|
|
{
|
|
DPRINTFn(9, sc->sc_dev, "%s(0x%x, 0x%x)\n", __func__, (int)off, val);
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, off, val);
|
|
}
|
|
|
|
static int
|
|
ixpqmgr_probe(device_t dev)
|
|
{
|
|
device_set_desc(dev, "IXP4XX Q-Manager");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ixpqmgr_attach(device_t dev)
|
|
{
|
|
struct ixpqmgr_softc *sc = device_get_softc(dev);
|
|
struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
|
|
int i, err;
|
|
|
|
ixpqmgr_sc = sc;
|
|
|
|
sc->sc_dev = dev;
|
|
sc->sc_iot = sa->sc_iot;
|
|
if (bus_space_map(sc->sc_iot, IXP425_QMGR_HWBASE, IXP425_QMGR_SIZE,
|
|
0, &sc->sc_ioh))
|
|
panic("%s: Cannot map registers", device_get_name(dev));
|
|
|
|
/* NB: we only use the lower 32 q's */
|
|
|
|
/* Set up QMGR interrupts */
|
|
sc->sc_rid1 = 0;
|
|
sc->sc_irq1 = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_rid1,
|
|
IXP425_INT_QUE1_32, IXP425_INT_QUE1_32, 1, RF_ACTIVE);
|
|
sc->sc_rid2 = 1;
|
|
sc->sc_irq2 = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_rid2,
|
|
IXP425_INT_QUE33_64, IXP425_INT_QUE33_64, 1, RF_ACTIVE);
|
|
|
|
if (sc->sc_irq1 == NULL || sc->sc_irq2 == NULL)
|
|
panic("Unable to allocate the qmgr irqs.\n");
|
|
|
|
err = bus_setup_intr(dev, sc->sc_irq1, INTR_TYPE_NET | INTR_MPSAFE,
|
|
NULL, ixpqmgr_intr, NULL, &sc->sc_ih1);
|
|
if (err) {
|
|
device_printf(dev, "failed to set up qmgr irq=%d\n",
|
|
IXP425_INT_QUE1_32);
|
|
return (ENXIO);
|
|
}
|
|
err = bus_setup_intr(dev, sc->sc_irq2, INTR_TYPE_NET | INTR_MPSAFE,
|
|
NULL, ixpqmgr_intr, NULL, &sc->sc_ih2);
|
|
if (err) {
|
|
device_printf(dev, "failed to set up qmgr irq=%d\n",
|
|
IXP425_INT_QUE33_64);
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* NB: softc is pre-zero'd */
|
|
for (i = 0; i < IX_QMGR_MAX_NUM_QUEUES; i++) {
|
|
struct qmgrInfo *qi = &sc->qinfo[i];
|
|
|
|
qi->cb = dummyCallback;
|
|
qi->priority = IX_QMGR_Q_PRIORITY_0; /* default priority */
|
|
/*
|
|
* There are two interrupt registers, 32 bits each. One
|
|
* for the lower queues(0-31) and one for the upper
|
|
* queues(32-63). Therefore need to mod by 32 i.e the
|
|
* min upper queue identifier.
|
|
*/
|
|
qi->intRegCheckMask = (1<<(i%(IX_QMGR_MIN_QUEUPP_QID)));
|
|
|
|
/*
|
|
* Register addresses and bit masks are calculated and
|
|
* stored here to optimize QRead, QWrite and QStatusGet
|
|
* functions.
|
|
*/
|
|
|
|
/* AQM Queue access reg addresses, per queue */
|
|
qi->qAccRegAddr = IX_QMGR_Q_ACCESS_ADDR_GET(i);
|
|
qi->qAccRegAddr = IX_QMGR_Q_ACCESS_ADDR_GET(i);
|
|
qi->qConfigRegAddr = IX_QMGR_Q_CONFIG_ADDR_GET(i);
|
|
|
|
/* AQM Queue lower-group (0-31), only */
|
|
if (i < IX_QMGR_MIN_QUEUPP_QID) {
|
|
/* AQM Q underflow/overflow status reg address, per queue */
|
|
qi->qUOStatRegAddr = IX_QMGR_QUEUOSTAT0_OFFSET +
|
|
((i / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD) *
|
|
sizeof(uint32_t));
|
|
|
|
/* AQM Q underflow status bit masks for status reg per queue */
|
|
qi->qUflowStatBitMask =
|
|
(IX_QMGR_UNDERFLOW_BIT_OFFSET + 1) <<
|
|
((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) *
|
|
(32 / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD));
|
|
|
|
/* AQM Q overflow status bit masks for status reg, per queue */
|
|
qi->qOflowStatBitMask =
|
|
(IX_QMGR_OVERFLOW_BIT_OFFSET + 1) <<
|
|
((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) *
|
|
(32 / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD));
|
|
|
|
/* AQM Q lower-group (0-31) status reg addresses, per queue */
|
|
qi->qStatRegAddr = IX_QMGR_QUELOWSTAT0_OFFSET +
|
|
((i / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) *
|
|
sizeof(uint32_t));
|
|
|
|
/* AQM Q lower-group (0-31) status register bit offset */
|
|
qi->qStatBitsOffset =
|
|
(i & (IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD - 1)) *
|
|
(32 / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD);
|
|
} else { /* AQM Q upper-group (32-63), only */
|
|
qi->qUOStatRegAddr = 0; /* XXX */
|
|
|
|
/* AQM Q upper-group (32-63) Nearly Empty status reg bitmasks */
|
|
qi->qStat0BitMask = (1 << (i - IX_QMGR_MIN_QUEUPP_QID));
|
|
|
|
/* AQM Q upper-group (32-63) Full status register bitmasks */
|
|
qi->qStat1BitMask = (1 << (i - IX_QMGR_MIN_QUEUPP_QID));
|
|
}
|
|
}
|
|
|
|
sc->aqmFreeSramAddress = 0x100; /* Q buffer space starts at 0x2100 */
|
|
|
|
ixpqmgr_rebuild(sc); /* build initial priority table */
|
|
aqm_reset(sc); /* reset h/w */
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ixpqmgr_detach(device_t dev)
|
|
{
|
|
struct ixpqmgr_softc *sc = device_get_softc(dev);
|
|
|
|
aqm_reset(sc); /* disable interrupts */
|
|
bus_teardown_intr(dev, sc->sc_irq1, sc->sc_ih1);
|
|
bus_teardown_intr(dev, sc->sc_irq2, sc->sc_ih2);
|
|
bus_release_resource(dev, SYS_RES_IRQ, sc->sc_rid1, sc->sc_irq1);
|
|
bus_release_resource(dev, SYS_RES_IRQ, sc->sc_rid2, sc->sc_irq2);
|
|
bus_space_unmap(sc->sc_iot, sc->sc_ioh, IXP425_QMGR_SIZE);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ixpqmgr_qconfig(int qId, int qEntries, int ne, int nf, int srcSel,
|
|
qconfig_hand_t *cb, void *cbarg)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
struct qmgrInfo *qi = &sc->qinfo[qId];
|
|
|
|
DPRINTF(sc->sc_dev, "%s(%u, %u, %u, %u, %u, %p, %p)\n",
|
|
__func__, qId, qEntries, ne, nf, srcSel, cb, cbarg);
|
|
|
|
/* NB: entry size is always 1 */
|
|
qi->qSizeInWords = qEntries;
|
|
|
|
qi->qReadCount = 0;
|
|
qi->qWriteCount = 0;
|
|
qi->qSizeInEntries = qEntries; /* XXX kept for code clarity */
|
|
|
|
if (cb == NULL) {
|
|
/* Reset to dummy callback */
|
|
qi->cb = dummyCallback;
|
|
qi->cbarg = NULL;
|
|
} else {
|
|
qi->cb = cb;
|
|
qi->cbarg = cbarg;
|
|
}
|
|
|
|
/* Write the config register; NB must be AFTER qinfo setup */
|
|
aqm_qcfg(sc, qId, ne, nf);
|
|
/*
|
|
* Account for space just allocated to queue.
|
|
*/
|
|
sc->aqmFreeSramAddress += (qi->qSizeInWords * sizeof(uint32_t));
|
|
|
|
/* Set the interrupt source if this queue is in the range 0-31 */
|
|
if (qId < IX_QMGR_MIN_QUEUPP_QID)
|
|
aqm_srcsel_write(sc, qId, srcSel);
|
|
|
|
if (cb != NULL) /* Enable the interrupt */
|
|
aqm_int_enable(sc, qId);
|
|
|
|
sc->rebuildTable = TRUE;
|
|
|
|
return 0; /* XXX */
|
|
}
|
|
|
|
int
|
|
ixpqmgr_qwrite(int qId, uint32_t entry)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
struct qmgrInfo *qi = &sc->qinfo[qId];
|
|
|
|
DPRINTFn(3, sc->sc_dev, "%s(%u, 0x%x) writeCount %u size %u\n",
|
|
__func__, qId, entry, qi->qWriteCount, qi->qSizeInEntries);
|
|
|
|
/* write the entry */
|
|
aqm_reg_write(sc, qi->qAccRegAddr, entry);
|
|
|
|
/* NB: overflow is available for lower queues only */
|
|
if (qId < IX_QMGR_MIN_QUEUPP_QID) {
|
|
int qSize = qi->qSizeInEntries;
|
|
/*
|
|
* Increment the current number of entries in the queue
|
|
* and check for overflow .
|
|
*/
|
|
if (qi->qWriteCount++ == qSize) { /* check for overflow */
|
|
uint32_t status = aqm_reg_read(sc, qi->qUOStatRegAddr);
|
|
int qPtrs;
|
|
|
|
/*
|
|
* Read the status twice because the status may
|
|
* not be immediately ready after the write operation
|
|
*/
|
|
if ((status & qi->qOflowStatBitMask) ||
|
|
((status = aqm_reg_read(sc, qi->qUOStatRegAddr)) & qi->qOflowStatBitMask)) {
|
|
/*
|
|
* The queue is full, clear the overflow status bit if set.
|
|
*/
|
|
aqm_reg_write(sc, qi->qUOStatRegAddr,
|
|
status & ~qi->qOflowStatBitMask);
|
|
qi->qWriteCount = qSize;
|
|
DPRINTFn(5, sc->sc_dev,
|
|
"%s(%u, 0x%x) Q full, overflow status cleared\n",
|
|
__func__, qId, entry);
|
|
return ENOSPC;
|
|
}
|
|
/*
|
|
* No overflow occurred : someone is draining the queue
|
|
* and the current counter needs to be
|
|
* updated from the current number of entries in the queue
|
|
*/
|
|
|
|
/* calculate number of words in q */
|
|
qPtrs = aqm_reg_read(sc, qi->qConfigRegAddr);
|
|
DPRINTFn(2, sc->sc_dev,
|
|
"%s(%u, 0x%x) Q full, no overflow status, qConfig 0x%x\n",
|
|
__func__, qId, entry, qPtrs);
|
|
qPtrs = (qPtrs - (qPtrs >> 7)) & 0x7f;
|
|
|
|
if (qPtrs == 0) {
|
|
/*
|
|
* The queue may be full at the time of the
|
|
* snapshot. Next access will check
|
|
* the overflow status again.
|
|
*/
|
|
qi->qWriteCount = qSize;
|
|
} else {
|
|
/* convert the number of words to a number of entries */
|
|
qi->qWriteCount = qPtrs & (qSize - 1);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
ixpqmgr_qread(int qId, uint32_t *entry)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
struct qmgrInfo *qi = &sc->qinfo[qId];
|
|
bus_size_t off = qi->qAccRegAddr;
|
|
|
|
*entry = aqm_reg_read(sc, off);
|
|
|
|
/*
|
|
* Reset the current read count : next access to the read function
|
|
* will force a underflow status check.
|
|
*/
|
|
qi->qReadCount = 0;
|
|
|
|
/* Check if underflow occurred on the read */
|
|
if (*entry == 0 && qId < IX_QMGR_MIN_QUEUPP_QID) {
|
|
/* get the queue status */
|
|
uint32_t status = aqm_reg_read(sc, qi->qUOStatRegAddr);
|
|
|
|
if (status & qi->qUflowStatBitMask) { /* clear underflow status */
|
|
aqm_reg_write(sc, qi->qUOStatRegAddr,
|
|
status &~ qi->qUflowStatBitMask);
|
|
return ENOSPC;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
ixpqmgr_qreadm(int qId, uint32_t n, uint32_t *p)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
struct qmgrInfo *qi = &sc->qinfo[qId];
|
|
uint32_t entry;
|
|
bus_size_t off = qi->qAccRegAddr;
|
|
|
|
entry = aqm_reg_read(sc, off);
|
|
while (--n) {
|
|
if (entry == 0) {
|
|
/* if we read a NULL entry, stop. We have underflowed */
|
|
break;
|
|
}
|
|
*p++ = entry; /* store */
|
|
entry = aqm_reg_read(sc, off);
|
|
}
|
|
*p = entry;
|
|
|
|
/*
|
|
* Reset the current read count : next access to the read function
|
|
* will force a underflow status check.
|
|
*/
|
|
qi->qReadCount = 0;
|
|
|
|
/* Check if underflow occurred on the read */
|
|
if (entry == 0 && qId < IX_QMGR_MIN_QUEUPP_QID) {
|
|
/* get the queue status */
|
|
uint32_t status = aqm_reg_read(sc, qi->qUOStatRegAddr);
|
|
|
|
if (status & qi->qUflowStatBitMask) { /* clear underflow status */
|
|
aqm_reg_write(sc, qi->qUOStatRegAddr,
|
|
status &~ qi->qUflowStatBitMask);
|
|
return ENOSPC;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
uint32_t
|
|
ixpqmgr_getqstatus(int qId)
|
|
{
|
|
#define QLOWSTATMASK \
|
|
((1 << (32 / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD)) - 1)
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
const struct qmgrInfo *qi = &sc->qinfo[qId];
|
|
uint32_t status;
|
|
|
|
if (qId < IX_QMGR_MIN_QUEUPP_QID) {
|
|
/* read the status of a queue in the range 0-31 */
|
|
status = aqm_reg_read(sc, qi->qStatRegAddr);
|
|
|
|
/* mask out the status bits relevant only to this queue */
|
|
status = (status >> qi->qStatBitsOffset) & QLOWSTATMASK;
|
|
} else { /* read status of a queue in the range 32-63 */
|
|
status = 0;
|
|
if (aqm_reg_read(sc, IX_QMGR_QUEUPPSTAT0_OFFSET)&qi->qStat0BitMask)
|
|
status |= IX_QMGR_Q_STATUS_NE_BIT_MASK; /* nearly empty */
|
|
if (aqm_reg_read(sc, IX_QMGR_QUEUPPSTAT1_OFFSET)&qi->qStat1BitMask)
|
|
status |= IX_QMGR_Q_STATUS_F_BIT_MASK; /* full */
|
|
}
|
|
return status;
|
|
#undef QLOWSTATMASK
|
|
}
|
|
|
|
uint32_t
|
|
ixpqmgr_getqconfig(int qId)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
|
|
return aqm_reg_read(sc, IX_QMGR_Q_CONFIG_ADDR_GET(qId));
|
|
}
|
|
|
|
void
|
|
ixpqmgr_dump(void)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
int i, a;
|
|
|
|
/* status registers */
|
|
printf("0x%04x: %08x %08x %08x %08x\n"
|
|
, 0x400
|
|
, aqm_reg_read(sc, 0x400)
|
|
, aqm_reg_read(sc, 0x400+4)
|
|
, aqm_reg_read(sc, 0x400+8)
|
|
, aqm_reg_read(sc, 0x400+12)
|
|
);
|
|
printf("0x%04x: %08x %08x %08x %08x\n"
|
|
, 0x410
|
|
, aqm_reg_read(sc, 0x410)
|
|
, aqm_reg_read(sc, 0x410+4)
|
|
, aqm_reg_read(sc, 0x410+8)
|
|
, aqm_reg_read(sc, 0x410+12)
|
|
);
|
|
printf("0x%04x: %08x %08x %08x %08x\n"
|
|
, 0x420
|
|
, aqm_reg_read(sc, 0x420)
|
|
, aqm_reg_read(sc, 0x420+4)
|
|
, aqm_reg_read(sc, 0x420+8)
|
|
, aqm_reg_read(sc, 0x420+12)
|
|
);
|
|
printf("0x%04x: %08x %08x %08x %08x\n"
|
|
, 0x430
|
|
, aqm_reg_read(sc, 0x430)
|
|
, aqm_reg_read(sc, 0x430+4)
|
|
, aqm_reg_read(sc, 0x430+8)
|
|
, aqm_reg_read(sc, 0x430+12)
|
|
);
|
|
/* q configuration registers */
|
|
for (a = 0x2000; a < 0x20ff; a += 32)
|
|
printf("0x%04x: %08x %08x %08x %08x %08x %08x %08x %08x\n"
|
|
, a
|
|
, aqm_reg_read(sc, a)
|
|
, aqm_reg_read(sc, a+4)
|
|
, aqm_reg_read(sc, a+8)
|
|
, aqm_reg_read(sc, a+12)
|
|
, aqm_reg_read(sc, a+16)
|
|
, aqm_reg_read(sc, a+20)
|
|
, aqm_reg_read(sc, a+24)
|
|
, aqm_reg_read(sc, a+28)
|
|
);
|
|
/* allocated SRAM */
|
|
for (i = 0x100; i < sc->aqmFreeSramAddress; i += 32) {
|
|
a = 0x2000 + i;
|
|
printf("0x%04x: %08x %08x %08x %08x %08x %08x %08x %08x\n"
|
|
, a
|
|
, aqm_reg_read(sc, a)
|
|
, aqm_reg_read(sc, a+4)
|
|
, aqm_reg_read(sc, a+8)
|
|
, aqm_reg_read(sc, a+12)
|
|
, aqm_reg_read(sc, a+16)
|
|
, aqm_reg_read(sc, a+20)
|
|
, aqm_reg_read(sc, a+24)
|
|
, aqm_reg_read(sc, a+28)
|
|
);
|
|
}
|
|
for (i = 0; i < 16; i++) {
|
|
printf("Q[%2d] config 0x%08x status 0x%02x "
|
|
"Q[%2d] config 0x%08x status 0x%02x\n"
|
|
, i, ixpqmgr_getqconfig(i), ixpqmgr_getqstatus(i)
|
|
, i+16, ixpqmgr_getqconfig(i+16), ixpqmgr_getqstatus(i+16)
|
|
);
|
|
}
|
|
}
|
|
|
|
void
|
|
ixpqmgr_notify_enable(int qId, int srcSel)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
#if 0
|
|
/* Calculate the checkMask and checkValue for this q */
|
|
aqm_calc_statuscheck(sc, qId, srcSel);
|
|
#endif
|
|
/* Set the interrupt source if this queue is in the range 0-31 */
|
|
if (qId < IX_QMGR_MIN_QUEUPP_QID)
|
|
aqm_srcsel_write(sc, qId, srcSel);
|
|
|
|
/* Enable the interrupt */
|
|
aqm_int_enable(sc, qId);
|
|
}
|
|
|
|
void
|
|
ixpqmgr_notify_disable(int qId)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
|
|
aqm_int_disable(sc, qId);
|
|
}
|
|
|
|
/*
|
|
* Rebuild the priority table used by the dispatcher.
|
|
*/
|
|
static void
|
|
ixpqmgr_rebuild(struct ixpqmgr_softc *sc)
|
|
{
|
|
int q, pri;
|
|
int lowQuePriorityTableIndex, uppQuePriorityTableIndex;
|
|
struct qmgrInfo *qi;
|
|
|
|
sc->lowPriorityTableFirstHalfMask = 0;
|
|
sc->uppPriorityTableFirstHalfMask = 0;
|
|
|
|
lowQuePriorityTableIndex = 0;
|
|
uppQuePriorityTableIndex = 32;
|
|
for (pri = 0; pri < IX_QMGR_NUM_PRIORITY_LEVELS; pri++) {
|
|
/* low priority q's */
|
|
for (q = 0; q < IX_QMGR_MIN_QUEUPP_QID; q++) {
|
|
qi = &sc->qinfo[q];
|
|
if (qi->priority == pri) {
|
|
/*
|
|
* Build the priority table bitmask which match the
|
|
* queues of the first half of the priority table.
|
|
*/
|
|
if (lowQuePriorityTableIndex < 16) {
|
|
sc->lowPriorityTableFirstHalfMask |=
|
|
qi->intRegCheckMask;
|
|
}
|
|
sc->priorityTable[lowQuePriorityTableIndex++] = q;
|
|
}
|
|
}
|
|
/* high priority q's */
|
|
for (; q < IX_QMGR_MAX_NUM_QUEUES; q++) {
|
|
qi = &sc->qinfo[q];
|
|
if (qi->priority == pri) {
|
|
/*
|
|
* Build the priority table bitmask which match the
|
|
* queues of the first half of the priority table .
|
|
*/
|
|
if (uppQuePriorityTableIndex < 48) {
|
|
sc->uppPriorityTableFirstHalfMask |=
|
|
qi->intRegCheckMask;
|
|
}
|
|
sc->priorityTable[uppQuePriorityTableIndex++] = q;
|
|
}
|
|
}
|
|
}
|
|
sc->rebuildTable = FALSE;
|
|
}
|
|
|
|
/*
|
|
* Count the number of leading zero bits in a word,
|
|
* and return the same value than the CLZ instruction.
|
|
* Note this is similar to the standard ffs function but
|
|
* it counts zero's from the MSB instead of the LSB.
|
|
*
|
|
* word (in) return value (out)
|
|
* 0x80000000 0
|
|
* 0x40000000 1
|
|
* ,,, ,,,
|
|
* 0x00000002 30
|
|
* 0x00000001 31
|
|
* 0x00000000 32
|
|
*
|
|
* The C version of this function is used as a replacement
|
|
* for system not providing the equivalent of the CLZ
|
|
* assembly language instruction.
|
|
*
|
|
* Note that this version is big-endian
|
|
*/
|
|
static unsigned int
|
|
_lzcount(uint32_t word)
|
|
{
|
|
unsigned int lzcount = 0;
|
|
|
|
if (word == 0)
|
|
return 32;
|
|
while ((word & 0x80000000) == 0) {
|
|
word <<= 1;
|
|
lzcount++;
|
|
}
|
|
return lzcount;
|
|
}
|
|
|
|
static void
|
|
ixpqmgr_intr(void *arg)
|
|
{
|
|
struct ixpqmgr_softc *sc = ixpqmgr_sc;
|
|
uint32_t intRegVal; /* Interrupt reg val */
|
|
struct qmgrInfo *qi;
|
|
int priorityTableIndex; /* Priority table index */
|
|
int qIndex; /* Current queue being processed */
|
|
|
|
/* Read the interrupt register */
|
|
intRegVal = aqm_reg_read(sc, IX_QMGR_QINTREG0_OFFSET);
|
|
/* Write back to clear interrupt */
|
|
aqm_reg_write(sc, IX_QMGR_QINTREG0_OFFSET, intRegVal);
|
|
|
|
DPRINTFn(5, sc->sc_dev, "%s: ISR0 0x%x ISR1 0x%x\n",
|
|
__func__, intRegVal, aqm_reg_read(sc, IX_QMGR_QINTREG1_OFFSET));
|
|
|
|
/* No queue has interrupt register set */
|
|
if (intRegVal != 0) {
|
|
/* get the first queue Id from the interrupt register value */
|
|
qIndex = (32 - 1) - _lzcount(intRegVal);
|
|
|
|
DPRINTFn(2, sc->sc_dev, "%s: ISR0 0x%x qIndex %u\n",
|
|
__func__, intRegVal, qIndex);
|
|
|
|
/*
|
|
* Optimize for single callback case.
|
|
*/
|
|
qi = &sc->qinfo[qIndex];
|
|
if (intRegVal == qi->intRegCheckMask) {
|
|
/*
|
|
* Only 1 queue event triggered a notification.
|
|
* Call the callback function for this queue
|
|
*/
|
|
qi->cb(qIndex, qi->cbarg);
|
|
} else {
|
|
/*
|
|
* The event is triggered by more than 1 queue,
|
|
* the queue search will start from the beginning
|
|
* or the middle of the priority table.
|
|
*
|
|
* The search will end when all the bits of the interrupt
|
|
* register are cleared. There is no need to maintain
|
|
* a separate value and test it at each iteration.
|
|
*/
|
|
if (intRegVal & sc->lowPriorityTableFirstHalfMask) {
|
|
priorityTableIndex = 0;
|
|
} else {
|
|
priorityTableIndex = 16;
|
|
}
|
|
/*
|
|
* Iterate over the priority table until all the bits
|
|
* of the interrupt register are cleared.
|
|
*/
|
|
do {
|
|
qIndex = sc->priorityTable[priorityTableIndex++];
|
|
qi = &sc->qinfo[qIndex];
|
|
|
|
/* If this queue caused this interrupt to be raised */
|
|
if (intRegVal & qi->intRegCheckMask) {
|
|
/* Call the callback function for this queue */
|
|
qi->cb(qIndex, qi->cbarg);
|
|
/* Clear the interrupt register bit */
|
|
intRegVal &= ~qi->intRegCheckMask;
|
|
}
|
|
} while (intRegVal);
|
|
}
|
|
}
|
|
|
|
/* Rebuild the priority table if needed */
|
|
if (sc->rebuildTable)
|
|
ixpqmgr_rebuild(sc);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Generate the parameters used to check if a Q's status matches
|
|
* the specified source select. We calculate which status word
|
|
* to check (statusWordOffset), the value to check the status
|
|
* against (statusCheckValue) and the mask (statusMask) to mask
|
|
* out all but the bits to check in the status word.
|
|
*/
|
|
static void
|
|
aqm_calc_statuscheck(int qId, IxQMgrSourceId srcSel)
|
|
{
|
|
struct qmgrInfo *qi = &qinfo[qId];
|
|
uint32_t shiftVal;
|
|
|
|
if (qId < IX_QMGR_MIN_QUEUPP_QID) {
|
|
switch (srcSel) {
|
|
case IX_QMGR_Q_SOURCE_ID_E:
|
|
qi->statusCheckValue = IX_QMGR_Q_STATUS_E_BIT_MASK;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_E_BIT_MASK;
|
|
break;
|
|
case IX_QMGR_Q_SOURCE_ID_NE:
|
|
qi->statusCheckValue = IX_QMGR_Q_STATUS_NE_BIT_MASK;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_NE_BIT_MASK;
|
|
break;
|
|
case IX_QMGR_Q_SOURCE_ID_NF:
|
|
qi->statusCheckValue = IX_QMGR_Q_STATUS_NF_BIT_MASK;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_NF_BIT_MASK;
|
|
break;
|
|
case IX_QMGR_Q_SOURCE_ID_F:
|
|
qi->statusCheckValue = IX_QMGR_Q_STATUS_F_BIT_MASK;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_F_BIT_MASK;
|
|
break;
|
|
case IX_QMGR_Q_SOURCE_ID_NOT_E:
|
|
qi->statusCheckValue = 0;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_E_BIT_MASK;
|
|
break;
|
|
case IX_QMGR_Q_SOURCE_ID_NOT_NE:
|
|
qi->statusCheckValue = 0;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_NE_BIT_MASK;
|
|
break;
|
|
case IX_QMGR_Q_SOURCE_ID_NOT_NF:
|
|
qi->statusCheckValue = 0;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_NF_BIT_MASK;
|
|
break;
|
|
case IX_QMGR_Q_SOURCE_ID_NOT_F:
|
|
qi->statusCheckValue = 0;
|
|
qi->statusMask = IX_QMGR_Q_STATUS_F_BIT_MASK;
|
|
break;
|
|
default:
|
|
/* Should never hit */
|
|
IX_OSAL_ASSERT(0);
|
|
break;
|
|
}
|
|
|
|
/* One nibble of status per queue so need to shift the
|
|
* check value and mask out to the correct position.
|
|
*/
|
|
shiftVal = (qId % IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) *
|
|
IX_QMGR_QUELOWSTAT_BITS_PER_Q;
|
|
|
|
/* Calculate the which status word to check from the qId,
|
|
* 8 Qs status per word
|
|
*/
|
|
qi->statusWordOffset = qId / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD;
|
|
|
|
qi->statusCheckValue <<= shiftVal;
|
|
qi->statusMask <<= shiftVal;
|
|
} else {
|
|
/* One status word */
|
|
qi->statusWordOffset = 0;
|
|
/* Single bits per queue and int source bit hardwired NE,
|
|
* Qs start at 32.
|
|
*/
|
|
qi->statusMask = 1 << (qId - IX_QMGR_MIN_QUEUPP_QID);
|
|
qi->statusCheckValue = qi->statusMask;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
aqm_int_enable(struct ixpqmgr_softc *sc, int qId)
|
|
{
|
|
bus_size_t reg;
|
|
uint32_t v;
|
|
|
|
if (qId < IX_QMGR_MIN_QUEUPP_QID)
|
|
reg = IX_QMGR_QUEIEREG0_OFFSET;
|
|
else
|
|
reg = IX_QMGR_QUEIEREG1_OFFSET;
|
|
v = aqm_reg_read(sc, reg);
|
|
aqm_reg_write(sc, reg, v | (1 << (qId % IX_QMGR_MIN_QUEUPP_QID)));
|
|
|
|
DPRINTF(sc->sc_dev, "%s(%u) 0x%lx: 0x%x => 0x%x\n",
|
|
__func__, qId, reg, v, aqm_reg_read(sc, reg));
|
|
}
|
|
|
|
static void
|
|
aqm_int_disable(struct ixpqmgr_softc *sc, int qId)
|
|
{
|
|
bus_size_t reg;
|
|
uint32_t v;
|
|
|
|
if (qId < IX_QMGR_MIN_QUEUPP_QID)
|
|
reg = IX_QMGR_QUEIEREG0_OFFSET;
|
|
else
|
|
reg = IX_QMGR_QUEIEREG1_OFFSET;
|
|
v = aqm_reg_read(sc, reg);
|
|
aqm_reg_write(sc, reg, v &~ (1 << (qId % IX_QMGR_MIN_QUEUPP_QID)));
|
|
|
|
DPRINTF(sc->sc_dev, "%s(%u) 0x%lx: 0x%x => 0x%x\n",
|
|
__func__, qId, reg, v, aqm_reg_read(sc, reg));
|
|
}
|
|
|
|
static unsigned
|
|
log2(unsigned n)
|
|
{
|
|
unsigned count;
|
|
/*
|
|
* N.B. this function will return 0 if supplied 0.
|
|
*/
|
|
for (count = 0; n/2; count++)
|
|
n /= 2;
|
|
return count;
|
|
}
|
|
|
|
static __inline unsigned
|
|
toAqmEntrySize(int entrySize)
|
|
{
|
|
/* entrySize 1("00"),2("01"),4("10") */
|
|
return log2(entrySize);
|
|
}
|
|
|
|
static __inline unsigned
|
|
toAqmBufferSize(unsigned bufferSizeInWords)
|
|
{
|
|
/* bufferSize 16("00"),32("01),64("10"),128("11") */
|
|
return log2(bufferSizeInWords / IX_QMGR_MIN_BUFFER_SIZE);
|
|
}
|
|
|
|
static __inline unsigned
|
|
toAqmWatermark(int watermark)
|
|
{
|
|
/*
|
|
* Watermarks 0("000"),1("001"),2("010"),4("011"),
|
|
* 8("100"),16("101"),32("110"),64("111")
|
|
*/
|
|
return log2(2 * watermark);
|
|
}
|
|
|
|
static void
|
|
aqm_qcfg(struct ixpqmgr_softc *sc, int qId, u_int ne, u_int nf)
|
|
{
|
|
const struct qmgrInfo *qi = &sc->qinfo[qId];
|
|
uint32_t qCfg;
|
|
uint32_t baseAddress;
|
|
|
|
/* Build config register */
|
|
qCfg = ((toAqmEntrySize(1) & IX_QMGR_ENTRY_SIZE_MASK) <<
|
|
IX_QMGR_Q_CONFIG_ESIZE_OFFSET)
|
|
| ((toAqmBufferSize(qi->qSizeInWords) & IX_QMGR_SIZE_MASK) <<
|
|
IX_QMGR_Q_CONFIG_BSIZE_OFFSET);
|
|
|
|
/* baseAddress, calculated relative to start address */
|
|
baseAddress = sc->aqmFreeSramAddress;
|
|
|
|
/* base address must be word-aligned */
|
|
KASSERT((baseAddress % IX_QMGR_BASE_ADDR_16_WORD_ALIGN) == 0,
|
|
("address not word-aligned"));
|
|
|
|
/* Now convert to a 16 word pointer as required by QUECONFIG register */
|
|
baseAddress >>= IX_QMGR_BASE_ADDR_16_WORD_SHIFT;
|
|
qCfg |= baseAddress << IX_QMGR_Q_CONFIG_BADDR_OFFSET;
|
|
|
|
/* set watermarks */
|
|
qCfg |= (toAqmWatermark(ne) << IX_QMGR_Q_CONFIG_NE_OFFSET)
|
|
| (toAqmWatermark(nf) << IX_QMGR_Q_CONFIG_NF_OFFSET);
|
|
|
|
DPRINTF(sc->sc_dev, "%s(%u, %u, %u) 0x%x => 0x%x @ 0x%x\n",
|
|
__func__, qId, ne, nf,
|
|
aqm_reg_read(sc, IX_QMGR_Q_CONFIG_ADDR_GET(qId)),
|
|
qCfg, IX_QMGR_Q_CONFIG_ADDR_GET(qId));
|
|
|
|
aqm_reg_write(sc, IX_QMGR_Q_CONFIG_ADDR_GET(qId), qCfg);
|
|
}
|
|
|
|
static void
|
|
aqm_srcsel_write(struct ixpqmgr_softc *sc, int qId, int sourceId)
|
|
{
|
|
bus_size_t off;
|
|
uint32_t v;
|
|
|
|
/*
|
|
* Calculate the register offset; multiple queues split across registers
|
|
*/
|
|
off = IX_QMGR_INT0SRCSELREG0_OFFSET +
|
|
((qId / IX_QMGR_INTSRC_NUM_QUE_PER_WORD) * sizeof(uint32_t));
|
|
|
|
v = aqm_reg_read(sc, off);
|
|
if (off == IX_QMGR_INT0SRCSELREG0_OFFSET && qId == 0) {
|
|
/* Queue 0 at INT0SRCSELREG should not corrupt the value bit-3 */
|
|
v |= 0x7;
|
|
} else {
|
|
const uint32_t bpq = 32 / IX_QMGR_INTSRC_NUM_QUE_PER_WORD;
|
|
uint32_t mask;
|
|
int qshift;
|
|
|
|
qshift = (qId & (IX_QMGR_INTSRC_NUM_QUE_PER_WORD-1)) * bpq;
|
|
mask = ((1 << bpq) - 1) << qshift; /* q's status mask */
|
|
|
|
/* merge sourceId */
|
|
v = (v &~ mask) | ((sourceId << qshift) & mask);
|
|
}
|
|
|
|
DPRINTF(sc->sc_dev, "%s(%u, %u) 0x%x => 0x%x @ 0x%lx\n",
|
|
__func__, qId, sourceId, aqm_reg_read(sc, off), v, off);
|
|
aqm_reg_write(sc, off, v);
|
|
}
|
|
|
|
/*
|
|
* Reset AQM registers to default values.
|
|
*/
|
|
static void
|
|
aqm_reset(struct ixpqmgr_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
/* Reset queues 0..31 status registers 0..3 */
|
|
aqm_reg_write(sc, IX_QMGR_QUELOWSTAT0_OFFSET,
|
|
IX_QMGR_QUELOWSTAT_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_QUELOWSTAT1_OFFSET,
|
|
IX_QMGR_QUELOWSTAT_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_QUELOWSTAT2_OFFSET,
|
|
IX_QMGR_QUELOWSTAT_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_QUELOWSTAT3_OFFSET,
|
|
IX_QMGR_QUELOWSTAT_RESET_VALUE);
|
|
|
|
/* Reset underflow/overflow status registers 0..1 */
|
|
aqm_reg_write(sc, IX_QMGR_QUEUOSTAT0_OFFSET,
|
|
IX_QMGR_QUEUOSTAT_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_QUEUOSTAT1_OFFSET,
|
|
IX_QMGR_QUEUOSTAT_RESET_VALUE);
|
|
|
|
/* Reset queues 32..63 nearly empty status registers */
|
|
aqm_reg_write(sc, IX_QMGR_QUEUPPSTAT0_OFFSET,
|
|
IX_QMGR_QUEUPPSTAT0_RESET_VALUE);
|
|
|
|
/* Reset queues 32..63 full status registers */
|
|
aqm_reg_write(sc, IX_QMGR_QUEUPPSTAT1_OFFSET,
|
|
IX_QMGR_QUEUPPSTAT1_RESET_VALUE);
|
|
|
|
/* Reset int0 status flag source select registers 0..3 */
|
|
aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG0_OFFSET,
|
|
IX_QMGR_INT0SRCSELREG_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG1_OFFSET,
|
|
IX_QMGR_INT0SRCSELREG_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG2_OFFSET,
|
|
IX_QMGR_INT0SRCSELREG_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_INT0SRCSELREG3_OFFSET,
|
|
IX_QMGR_INT0SRCSELREG_RESET_VALUE);
|
|
|
|
/* Reset queue interrupt enable register 0..1 */
|
|
aqm_reg_write(sc, IX_QMGR_QUEIEREG0_OFFSET,
|
|
IX_QMGR_QUEIEREG_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_QUEIEREG1_OFFSET,
|
|
IX_QMGR_QUEIEREG_RESET_VALUE);
|
|
|
|
/* Reset queue interrupt register 0..1 */
|
|
aqm_reg_write(sc, IX_QMGR_QINTREG0_OFFSET, IX_QMGR_QINTREG_RESET_VALUE);
|
|
aqm_reg_write(sc, IX_QMGR_QINTREG1_OFFSET, IX_QMGR_QINTREG_RESET_VALUE);
|
|
|
|
/* Reset queue configuration words 0..63 */
|
|
for (i = 0; i < IX_QMGR_MAX_NUM_QUEUES; i++)
|
|
aqm_reg_write(sc, sc->qinfo[i].qConfigRegAddr,
|
|
IX_QMGR_QUECONFIG_RESET_VALUE);
|
|
|
|
/* XXX zero SRAM to simplify debugging */
|
|
for (i = IX_QMGR_QUEBUFFER_SPACE_OFFSET;
|
|
i < IX_QMGR_AQM_SRAM_SIZE_IN_BYTES; i += sizeof(uint32_t))
|
|
aqm_reg_write(sc, i, 0);
|
|
}
|
|
|
|
static device_method_t ixpqmgr_methods[] = {
|
|
DEVMETHOD(device_probe, ixpqmgr_probe),
|
|
DEVMETHOD(device_attach, ixpqmgr_attach),
|
|
DEVMETHOD(device_detach, ixpqmgr_detach),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t ixpqmgr_driver = {
|
|
"ixpqmgr",
|
|
ixpqmgr_methods,
|
|
sizeof(struct ixpqmgr_softc),
|
|
};
|
|
static devclass_t ixpqmgr_devclass;
|
|
|
|
DRIVER_MODULE(ixpqmgr, ixp, ixpqmgr_driver, ixpqmgr_devclass, 0, 0);
|