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freebsd-dev/sys/dev/mly/mly_pci.c
Mark Murray ed34d0ade2 Turn on interrupt-entropy harvesting for all/any mass storage devices 
I could find. I have no doubt missed a couple.

Interrupt entropy harvesting is still conditional on the
kern.random.sys.harvest_interrupt sysctl.
2001-03-01 17:09:09 +00:00

578 lines
18 KiB
C
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/*-
* Copyright (c) 2000, 2001 Michael Smith
* Copyright (c) 2000 BSDi
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/disk.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#include <dev/mly/mlyreg.h>
#include <dev/mly/mlyio.h>
#include <dev/mly/mlyvar.h>
static int mly_pci_probe(device_t dev);
static int mly_pci_attach(device_t dev);
static int mly_pci_detach(device_t dev);
static int mly_pci_shutdown(device_t dev);
static int mly_pci_suspend(device_t dev);
static int mly_pci_resume(device_t dev);
static void mly_pci_intr(void *arg);
static int mly_sg_map(struct mly_softc *sc);
static void mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
static int mly_mmbox_map(struct mly_softc *sc);
static void mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
static device_method_t mly_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mly_pci_probe),
DEVMETHOD(device_attach, mly_pci_attach),
DEVMETHOD(device_detach, mly_pci_detach),
DEVMETHOD(device_shutdown, mly_pci_shutdown),
DEVMETHOD(device_suspend, mly_pci_suspend),
DEVMETHOD(device_resume, mly_pci_resume),
{ 0, 0 }
};
static driver_t mly_pci_driver = {
"mly",
mly_methods,
sizeof(struct mly_softc)
};
static devclass_t mly_devclass;
DRIVER_MODULE(mly, pci, mly_pci_driver, mly_devclass, 0, 0);
struct mly_ident
{
u_int16_t vendor;
u_int16_t device;
u_int16_t subvendor;
u_int16_t subdevice;
int hwif;
char *desc;
} mly_identifiers[] = {
{0x1069, 0xba56, 0x1069, 0x0040, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 2000"},
{0x1069, 0xba56, 0x1069, 0x0030, MLY_HWIF_STRONGARM, "Mylex eXtremeRAID 3000"},
{0x1069, 0x0050, 0x1069, 0x0050, MLY_HWIF_I960RX, "Mylex AcceleRAID 352"},
{0x1069, 0x0050, 0x1069, 0x0052, MLY_HWIF_I960RX, "Mylex AcceleRAID 170"},
{0x1069, 0x0050, 0x1069, 0x0054, MLY_HWIF_I960RX, "Mylex AcceleRAID 160"},
{0, 0, 0, 0, 0, 0}
};
/********************************************************************************
********************************************************************************
Bus Interface
********************************************************************************
********************************************************************************/
static int
mly_pci_probe(device_t dev)
{
struct mly_ident *m;
debug_called(1);
for (m = mly_identifiers; m->vendor != 0; m++) {
if ((m->vendor == pci_get_vendor(dev)) &&
(m->device == pci_get_device(dev)) &&
((m->subvendor == 0) || ((m->subvendor == pci_get_subvendor(dev)) &&
(m->subdevice == pci_get_subdevice(dev))))) {
device_set_desc(dev, m->desc);
return(-10); /* allow room to be overridden */
}
}
return(ENXIO);
}
static int
mly_pci_attach(device_t dev)
{
struct mly_softc *sc;
int i, error;
u_int32_t command;
debug_called(1);
/*
* Initialise softc.
*/
sc = device_get_softc(dev);
bzero(sc, sizeof(*sc));
sc->mly_dev = dev;
#ifdef MLY_DEBUG
if (device_get_unit(sc->mly_dev) == 0)
mly_softc0 = sc;
#endif
/* assume failure is 'not configured' */
error = ENXIO;
/*
* Verify that the adapter is correctly set up in PCI space.
*/
command = pci_read_config(sc->mly_dev, PCIR_COMMAND, 2);
command |= PCIM_CMD_BUSMASTEREN;
pci_write_config(dev, PCIR_COMMAND, command, 2);
command = pci_read_config(sc->mly_dev, PCIR_COMMAND, 2);
if (!(command & PCIM_CMD_BUSMASTEREN)) {
mly_printf(sc, "can't enable busmaster feature\n");
goto fail;
}
if ((command & PCIM_CMD_MEMEN) == 0) {
mly_printf(sc, "memory window not available\n");
goto fail;
}
/*
* Allocate the PCI register window.
*/
sc->mly_regs_rid = PCIR_MAPS; /* first base address register */
if ((sc->mly_regs_resource = bus_alloc_resource(sc->mly_dev, SYS_RES_MEMORY, &sc->mly_regs_rid,
0, ~0, 1, RF_ACTIVE)) == NULL) {
mly_printf(sc, "can't allocate register window\n");
goto fail;
}
sc->mly_btag = rman_get_bustag(sc->mly_regs_resource);
sc->mly_bhandle = rman_get_bushandle(sc->mly_regs_resource);
/*
* Allocate and connect our interrupt.
*/
sc->mly_irq_rid = 0;
if ((sc->mly_irq = bus_alloc_resource(sc->mly_dev, SYS_RES_IRQ, &sc->mly_irq_rid,
0, ~0, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
mly_printf(sc, "can't allocate interrupt\n");
goto fail;
}
if (bus_setup_intr(sc->mly_dev, sc->mly_irq, INTR_TYPE_CAM | INTR_ENTROPY, mly_pci_intr, sc, &sc->mly_intr)) {
mly_printf(sc, "can't set up interrupt\n");
goto fail;
}
/* assume failure is 'out of memory' */
error = ENOMEM;
/*
* Allocate the parent bus DMA tag appropriate for our PCI interface.
*
* Note that all of these controllers are 64-bit capable.
*/
if (bus_dma_tag_create(NULL, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MAXBSIZE, MLY_MAXSGENTRIES, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
&sc->mly_parent_dmat)) {
mly_printf(sc, "can't allocate parent DMA tag\n");
goto fail;
}
/*
* Create DMA tag for mapping buffers into controller-addressable space.
*/
if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MAXBSIZE, MLY_MAXSGENTRIES, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&sc->mly_buffer_dmat)) {
mly_printf(sc, "can't allocate buffer DMA tag\n");
goto fail;
}
/*
* Initialise the DMA tag for command packets.
*/
if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sizeof(union mly_command_packet) * MLY_MAXCOMMANDS, 1, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&sc->mly_packet_dmat)) {
mly_printf(sc, "can't allocate command packet DMA tag\n");
goto fail;
}
/*
* Detect the hardware interface version
*/
for (i = 0; mly_identifiers[i].vendor != 0; i++) {
if ((mly_identifiers[i].vendor == pci_get_vendor(dev)) &&
(mly_identifiers[i].device == pci_get_device(dev))) {
sc->mly_hwif = mly_identifiers[i].hwif;
switch(sc->mly_hwif) {
case MLY_HWIF_I960RX:
debug(2, "set hardware up for i960RX");
sc->mly_doorbell_true = 0x00;
sc->mly_command_mailbox = MLY_I960RX_COMMAND_MAILBOX;
sc->mly_status_mailbox = MLY_I960RX_STATUS_MAILBOX;
sc->mly_idbr = MLY_I960RX_IDBR;
sc->mly_odbr = MLY_I960RX_ODBR;
sc->mly_error_status = MLY_I960RX_ERROR_STATUS;
sc->mly_interrupt_status = MLY_I960RX_INTERRUPT_STATUS;
sc->mly_interrupt_mask = MLY_I960RX_INTERRUPT_MASK;
break;
case MLY_HWIF_STRONGARM:
debug(2, "set hardware up for StrongARM");
sc->mly_doorbell_true = 0xff; /* doorbell 'true' is 0 */
sc->mly_command_mailbox = MLY_STRONGARM_COMMAND_MAILBOX;
sc->mly_status_mailbox = MLY_STRONGARM_STATUS_MAILBOX;
sc->mly_idbr = MLY_STRONGARM_IDBR;
sc->mly_odbr = MLY_STRONGARM_ODBR;
sc->mly_error_status = MLY_STRONGARM_ERROR_STATUS;
sc->mly_interrupt_status = MLY_STRONGARM_INTERRUPT_STATUS;
sc->mly_interrupt_mask = MLY_STRONGARM_INTERRUPT_MASK;
break;
}
break;
}
}
/*
* Create the scatter/gather mappings.
*/
if ((error = mly_sg_map(sc)))
goto fail;
/*
* Allocate and map the memory mailbox
*/
if ((error = mly_mmbox_map(sc)))
goto fail;
/*
* Do bus-independent initialisation.
*/
if ((error = mly_attach(sc)))
goto fail;
return(0);
fail:
mly_free(sc);
return(error);
}
/********************************************************************************
* Disconnect from the controller completely, in preparation for unload.
*/
static int
mly_pci_detach(device_t dev)
{
struct mly_softc *sc = device_get_softc(dev);
int error;
debug_called(1);
if (sc->mly_state & MLY_STATE_OPEN)
return(EBUSY);
if ((error = mly_pci_shutdown(dev)))
return(error);
mly_free(sc);
return(0);
}
/********************************************************************************
* Bring the controller down to a dormant state and detach all child devices.
*
* This function is called before detach or system shutdown.
*
* Note that we can assume that the camq on the controller is empty, as we won't
* allow shutdown if any device is open.
*/
static int
mly_pci_shutdown(device_t dev)
{
struct mly_softc *sc = device_get_softc(dev);
debug_called(1);
mly_detach(sc);
return(0);
}
/********************************************************************************
* Bring the controller to a quiescent state, ready for system suspend.
*
* We can't assume that the controller is not active at this point, so we need
* to mask interrupts.
*/
static int
mly_pci_suspend(device_t dev)
{
struct mly_softc *sc = device_get_softc(dev);
int s;
debug_called(1);
s = splcam();
mly_detach(sc);
splx(s);
return(0);
}
/********************************************************************************
* Bring the controller back to a state ready for operation.
*/
static int
mly_pci_resume(device_t dev)
{
struct mly_softc *sc = device_get_softc(dev);
debug_called(1);
sc->mly_state &= ~MLY_STATE_SUSPEND;
MLY_UNMASK_INTERRUPTS(sc);
return(0);
}
/*******************************************************************************
* Take an interrupt, or be poked by other code to look for interrupt-worthy
* status.
*/
static void
mly_pci_intr(void *arg)
{
struct mly_softc *sc = (struct mly_softc *)arg;
debug_called(3);
/* collect finished commands, queue anything waiting */
mly_done(sc);
};
/********************************************************************************
********************************************************************************
Bus-dependant Resource Management
********************************************************************************
********************************************************************************/
/********************************************************************************
* Allocate memory for the scatter/gather tables
*/
static int
mly_sg_map(struct mly_softc *sc)
{
size_t segsize;
debug_called(1);
/*
* Create a single tag describing a region large enough to hold all of
* the s/g lists we will need.
*/
segsize = sizeof(struct mly_sg_entry) * MLY_MAXCOMMANDS * MLY_MAXSGENTRIES;
if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
segsize, 1, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&sc->mly_sg_dmat)) {
mly_printf(sc, "can't allocate scatter/gather DMA tag\n");
return(ENOMEM);
}
/*
* Allocate enough s/g maps for all commands and permanently map them into
* controller-visible space.
*
* XXX this assumes we can get enough space for all the s/g maps in one
* contiguous slab.
*/
if (bus_dmamem_alloc(sc->mly_sg_dmat, (void **)&sc->mly_sg_table, BUS_DMA_NOWAIT, &sc->mly_sg_dmamap)) {
mly_printf(sc, "can't allocate s/g table\n");
return(ENOMEM);
}
bus_dmamap_load(sc->mly_sg_dmat, sc->mly_sg_dmamap, sc->mly_sg_table, segsize, mly_sg_map_helper, sc, 0);
return(0);
}
/********************************************************************************
* Save the physical address of the base of the s/g table.
*/
static void
mly_sg_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct mly_softc *sc = (struct mly_softc *)arg;
debug_called(2);
/* save base of s/g table's address in bus space */
sc->mly_sg_busaddr = segs->ds_addr;
}
/********************************************************************************
* Allocate memory for the memory-mailbox interface
*/
static int
mly_mmbox_map(struct mly_softc *sc)
{
/*
* Create a DMA tag for a single contiguous region large enough for the
* memory mailbox structure.
*/
if (bus_dma_tag_create(sc->mly_parent_dmat, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sizeof(struct mly_mmbox), 1, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&sc->mly_mmbox_dmat)) {
mly_printf(sc, "can't allocate memory mailbox DMA tag\n");
return(ENOMEM);
}
/*
* Allocate the buffer
*/
if (bus_dmamem_alloc(sc->mly_mmbox_dmat, (void **)&sc->mly_mmbox, BUS_DMA_NOWAIT, &sc->mly_mmbox_dmamap)) {
mly_printf(sc, "can't allocate memory mailbox\n");
return(ENOMEM);
}
bus_dmamap_load(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap, sc->mly_mmbox, sizeof(struct mly_mmbox),
mly_mmbox_map_helper, sc, 0);
bzero(sc->mly_mmbox, sizeof(*sc->mly_mmbox));
return(0);
}
/********************************************************************************
* Save the physical address of the memory mailbox
*/
static void
mly_mmbox_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct mly_softc *sc = (struct mly_softc *)arg;
debug_called(2);
sc->mly_mmbox_busaddr = segs->ds_addr;
}
/********************************************************************************
* Free all of the resources associated with (sc)
*
* Should not be called if the controller is active.
*/
void
mly_free(struct mly_softc *sc)
{
struct mly_command *mc;
debug_called(1);
/* detach from CAM */
mly_cam_detach(sc);
/* throw away command buffer DMA maps */
while (mly_alloc_command(sc, &mc) == 0)
bus_dmamap_destroy(sc->mly_buffer_dmat, mc->mc_datamap);
/* release the packet storage */
if (sc->mly_packet != NULL) {
bus_dmamap_unload(sc->mly_packet_dmat, sc->mly_packetmap);
bus_dmamem_free(sc->mly_packet_dmat, sc->mly_packet, sc->mly_packetmap);
}
/* throw away the controllerinfo structure */
if (sc->mly_controllerinfo != NULL)
free(sc->mly_controllerinfo, M_DEVBUF);
/* throw away the controllerparam structure */
if (sc->mly_controllerparam != NULL)
free(sc->mly_controllerparam, M_DEVBUF);
/* destroy data-transfer DMA tag */
if (sc->mly_buffer_dmat)
bus_dma_tag_destroy(sc->mly_buffer_dmat);
/* free and destroy DMA memory and tag for s/g lists */
if (sc->mly_sg_table) {
bus_dmamap_unload(sc->mly_sg_dmat, sc->mly_sg_dmamap);
bus_dmamem_free(sc->mly_sg_dmat, sc->mly_sg_table, sc->mly_sg_dmamap);
}
if (sc->mly_sg_dmat)
bus_dma_tag_destroy(sc->mly_sg_dmat);
/* free and destroy DMA memory and tag for memory mailbox */
if (sc->mly_mmbox) {
bus_dmamap_unload(sc->mly_mmbox_dmat, sc->mly_mmbox_dmamap);
bus_dmamem_free(sc->mly_mmbox_dmat, sc->mly_mmbox, sc->mly_mmbox_dmamap);
}
if (sc->mly_mmbox_dmat)
bus_dma_tag_destroy(sc->mly_mmbox_dmat);
/* disconnect the interrupt handler */
if (sc->mly_intr)
bus_teardown_intr(sc->mly_dev, sc->mly_irq, sc->mly_intr);
if (sc->mly_irq != NULL)
bus_release_resource(sc->mly_dev, SYS_RES_IRQ, sc->mly_irq_rid, sc->mly_irq);
/* destroy the parent DMA tag */
if (sc->mly_parent_dmat)
bus_dma_tag_destroy(sc->mly_parent_dmat);
/* release the register window mapping */
if (sc->mly_regs_resource != NULL)
bus_release_resource(sc->mly_dev, SYS_RES_MEMORY, sc->mly_regs_rid, sc->mly_regs_resource);
}
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