freebsd-dev/sys/dev/aic7xxx/ahc_pci.c
Scott Long f6b1c44d1f Mega busdma API commit.
Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg.
Lockfunc allows a driver to provide a function for managing its locking
semantics while using busdma.  At the moment, this is used for the
asynchronous busdma_swi and callback mechanism.  Two lockfunc implementations
are provided: busdma_lock_mutex() performs standard mutex operations on the
mutex that is specified from lockfuncarg.  dftl_lock() is a panic
implementation and is defaulted to when NULL, NULL are passed to
bus_dma_tag_create().  The only time that NULL, NULL should ever be used is
when the driver ensures that bus_dmamap_load() will not be deferred.
Drivers that do not provide their own locking can pass
busdma_lock_mutex,&Giant args in order to preserve the former behaviour.

sparc64 and powerpc do not provide real busdma_swi functions, so this is
largely a noop on those platforms.  The busdma_swi on is64 is not properly
locked yet, so warnings will be emitted on this platform when busdma
callback deferrals happen.

If anyone gets panics or warnings from dflt_lock() being called, please
let me know right away.

Reviewed by:	tmm, gibbs
2003-07-01 15:52:06 +00:00

284 lines
7.6 KiB
C

/*
* FreeBSD, PCI product support functions
*
* Copyright (c) 1995-2001 Justin T. Gibbs
* 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, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU Public License ("GPL").
*
* 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.
*
* $Id: ahc_pci.c,v 1.53 2003/05/03 23:27:57 gibbs Exp $
*
* $FreeBSD$
*/
#include <dev/aic7xxx/aic7xxx_osm.h>
#define AHC_PCI_IOADDR PCIR_MAPS /* I/O Address */
#define AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
static int ahc_pci_probe(device_t dev);
static int ahc_pci_attach(device_t dev);
static device_method_t ahc_pci_device_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ahc_pci_probe),
DEVMETHOD(device_attach, ahc_pci_attach),
DEVMETHOD(device_detach, ahc_detach),
{ 0, 0 }
};
static driver_t ahc_pci_driver = {
"ahc",
ahc_pci_device_methods,
sizeof(struct ahc_softc)
};
DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0);
DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_devclass, 0, 0);
MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
MODULE_VERSION(ahc_pci, 1);
static int
ahc_pci_probe(device_t dev)
{
struct ahc_pci_identity *entry;
entry = ahc_find_pci_device(dev);
if (entry != NULL) {
device_set_desc(dev, entry->name);
return (0);
}
return (ENXIO);
}
static int
ahc_pci_attach(device_t dev)
{
struct ahc_pci_identity *entry;
struct ahc_softc *ahc;
char *name;
int error;
entry = ahc_find_pci_device(dev);
if (entry == NULL)
return (ENXIO);
/*
* Allocate a softc for this card and
* set it up for attachment by our
* common detect routine.
*/
name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
if (name == NULL)
return (ENOMEM);
strcpy(name, device_get_nameunit(dev));
ahc = ahc_alloc(dev, name);
if (ahc == NULL)
return (ENOMEM);
ahc_set_unit(ahc, device_get_unit(dev));
/*
* Should we bother disabling 39Bit addressing
* based on installed memory?
*/
if (sizeof(bus_addr_t) > 4)
ahc->flags |= AHC_39BIT_ADDRESSING;
/* Allocate a dmatag for our SCB DMA maps */
/* XXX Should be a child of the PCI bus dma tag */
error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
/*boundary*/0,
(ahc->flags & AHC_39BIT_ADDRESSING)
? 0x7FFFFFFFFF
: BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
/*nsegments*/AHC_NSEG,
/*maxsegsz*/AHC_MAXTRANSFER_SIZE,
/*flags*/0,
/*lockfunc*/busdma_lock_mutex,
/*lockarg*/&Giant,
&ahc->parent_dmat);
if (error != 0) {
printf("ahc_pci_attach: Could not allocate DMA tag "
"- error %d\n", error);
ahc_free(ahc);
return (ENOMEM);
}
ahc->dev_softc = dev;
error = ahc_pci_config(ahc, entry);
if (error != 0) {
ahc_free(ahc);
return (error);
}
ahc_attach(ahc);
return (0);
}
int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
struct resource *regs;
u_int command;
int regs_type;
int regs_id;
int allow_memio;
command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
regs = NULL;
regs_type = 0;
regs_id = 0;
/* Retrieve the per-device 'allow_memio' hint */
if (resource_int_value(device_get_name(ahc->dev_softc),
device_get_unit(ahc->dev_softc),
"allow_memio", &allow_memio) != 0) {
if (bootverbose)
device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
#ifdef AHC_ALLOW_MEMIO
if (bootverbose)
printf("on\n");
allow_memio = 1;
#else
if (bootverbose)
printf("off\n");
allow_memio = 0;
#endif
}
if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
regs_type = SYS_RES_MEMORY;
regs_id = AHC_PCI_MEMADDR;
regs = bus_alloc_resource(ahc->dev_softc, regs_type,
&regs_id, 0, ~0, 1, RF_ACTIVE);
if (regs != NULL) {
ahc->tag = rman_get_bustag(regs);
ahc->bsh = rman_get_bushandle(regs);
/*
* Do a quick test to see if memory mapped
* I/O is functioning correctly.
*/
if (ahc_pci_test_register_access(ahc) != 0) {
device_printf(ahc->dev_softc,
"PCI Device %d:%d:%d failed memory "
"mapped test. Using PIO.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc));
bus_release_resource(ahc->dev_softc, regs_type,
regs_id, regs);
regs = NULL;
} else {
command &= ~PCIM_CMD_PORTEN;
ahc_pci_write_config(ahc->dev_softc,
PCIR_COMMAND,
command, /*bytes*/1);
}
}
}
if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
regs_type = SYS_RES_IOPORT;
regs_id = AHC_PCI_IOADDR;
regs = bus_alloc_resource(ahc->dev_softc, regs_type,
&regs_id, 0, ~0, 1, RF_ACTIVE);
if (regs != NULL) {
ahc->tag = rman_get_bustag(regs);
ahc->bsh = rman_get_bushandle(regs);
command &= ~PCIM_CMD_MEMEN;
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
command, /*bytes*/1);
}
}
if (regs == NULL) {
device_printf(ahc->dev_softc,
"can't allocate register resources\n");
return (ENOMEM);
}
ahc->platform_data->regs_res_type = regs_type;
ahc->platform_data->regs_res_id = regs_id;
ahc->platform_data->regs = regs;
return (0);
}
int
ahc_pci_map_int(struct ahc_softc *ahc)
{
int zero;
zero = 0;
ahc->platform_data->irq =
bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
if (ahc->platform_data->irq == NULL) {
device_printf(ahc->dev_softc,
"bus_alloc_resource() failed to allocate IRQ\n");
return (ENOMEM);
}
ahc->platform_data->irq_res_type = SYS_RES_IRQ;
return (ahc_map_int(ahc));
}
void
ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
{
uint32_t cap;
u_int cap_offset;
/*
* Traverse the capability list looking for
* the power management capability.
*/
cap = 0;
cap_offset = ahc_pci_read_config(ahc->dev_softc,
PCIR_CAP_PTR, /*bytes*/1);
while (cap_offset != 0) {
cap = ahc_pci_read_config(ahc->dev_softc,
cap_offset, /*bytes*/4);
if ((cap & 0xFF) == 1
&& ((cap >> 16) & 0x3) > 0) {
uint32_t pm_control;
pm_control = ahc_pci_read_config(ahc->dev_softc,
cap_offset + 4,
/*bytes*/2);
pm_control &= ~0x3;
pm_control |= new_state;
ahc_pci_write_config(ahc->dev_softc,
cap_offset + 4,
pm_control, /*bytes*/2);
break;
}
cap_offset = (cap >> 8) & 0xFF;
}
}