freebsd-dev/sys/dev/aic7xxx/ahd_pci.c
Juli Mallett f1bd1e9dd7 Remove comments about creating DMA tags as children of the DMA tags of their
parent bus where the code has now been modified to do so.

Reviewed by:	scottl
2012-03-12 19:29:32 +00:00

263 lines
7.3 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: //depot/aic7xxx/freebsd/dev/aic7xxx/ahd_pci.c#17 $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <dev/aic7xxx/aic79xx_osm.h>
static int ahd_pci_probe(device_t dev);
static int ahd_pci_attach(device_t dev);
static device_method_t ahd_pci_device_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ahd_pci_probe),
DEVMETHOD(device_attach, ahd_pci_attach),
DEVMETHOD(device_detach, ahd_detach),
{ 0, 0 }
};
static driver_t ahd_pci_driver = {
"ahd",
ahd_pci_device_methods,
sizeof(struct ahd_softc)
};
static devclass_t ahd_devclass;
DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0);
MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
MODULE_VERSION(ahd_pci, 1);
static int
ahd_pci_probe(device_t dev)
{
struct ahd_pci_identity *entry;
entry = ahd_find_pci_device(dev);
if (entry != NULL) {
device_set_desc(dev, entry->name);
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
ahd_pci_attach(device_t dev)
{
struct ahd_pci_identity *entry;
struct ahd_softc *ahd;
char *name;
int error;
entry = ahd_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));
ahd = ahd_alloc(dev, name);
if (ahd == NULL)
return (ENOMEM);
ahd_set_unit(ahd, device_get_unit(dev));
/*
* Should we bother disabling 39Bit addressing
* based on installed memory?
*/
if (sizeof(bus_addr_t) > 4)
ahd->flags |= AHD_39BIT_ADDRESSING;
/* Allocate a dmatag for our SCB DMA maps */
error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev),
/*alignment*/1, /*boundary*/0,
(ahd->flags & AHD_39BIT_ADDRESSING)
? 0x7FFFFFFFFF
: BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
/*nsegments*/AHD_NSEG,
/*maxsegsz*/AHD_MAXTRANSFER_SIZE,
/*flags*/0,
&ahd->parent_dmat);
if (error != 0) {
printf("ahd_pci_attach: Could not allocate DMA tag "
"- error %d\n", error);
ahd_free(ahd);
return (ENOMEM);
}
ahd->dev_softc = dev;
error = ahd_pci_config(ahd, entry);
if (error != 0) {
ahd_free(ahd);
return (error);
}
ahd_sysctl(ahd);
ahd_attach(ahd);
return (0);
}
int
ahd_pci_map_registers(struct ahd_softc *ahd)
{
struct resource *regs;
struct resource *regs2;
u_int command;
int regs_type;
int regs_id;
int regs_id2;
int allow_memio;
command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
regs = NULL;
regs2 = NULL;
regs_type = 0;
regs_id = 0;
/* Retrieve the per-device 'allow_memio' hint */
if (resource_int_value(device_get_name(ahd->dev_softc),
device_get_unit(ahd->dev_softc),
"allow_memio", &allow_memio) != 0) {
if (bootverbose)
device_printf(ahd->dev_softc,
"Defaulting to MEMIO on\n");
allow_memio = 1;
}
if ((command & PCIM_CMD_MEMEN) != 0
&& (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
&& allow_memio != 0) {
regs_type = SYS_RES_MEMORY;
regs_id = AHD_PCI_MEMADDR;
regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
&regs_id, RF_ACTIVE);
if (regs != NULL) {
int error;
ahd->tags[0] = rman_get_bustag(regs);
ahd->bshs[0] = rman_get_bushandle(regs);
ahd->tags[1] = ahd->tags[0];
error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
/*offset*/0x100,
/*size*/0x100,
&ahd->bshs[1]);
/*
* Do a quick test to see if memory mapped
* I/O is functioning correctly.
*/
if (error != 0
|| ahd_pci_test_register_access(ahd) != 0) {
device_printf(ahd->dev_softc,
"PCI Device %d:%d:%d failed memory "
"mapped test. Using PIO.\n",
aic_get_pci_bus(ahd->dev_softc),
aic_get_pci_slot(ahd->dev_softc),
aic_get_pci_function(ahd->dev_softc));
bus_release_resource(ahd->dev_softc, regs_type,
regs_id, regs);
regs = NULL;
AHD_CORRECTABLE_ERROR(ahd);
} else {
command &= ~PCIM_CMD_PORTEN;
aic_pci_write_config(ahd->dev_softc,
PCIR_COMMAND,
command, /*bytes*/1);
}
}
}
if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
regs_type = SYS_RES_IOPORT;
regs_id = AHD_PCI_IOADDR0;
regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
&regs_id, RF_ACTIVE);
if (regs == NULL) {
device_printf(ahd->dev_softc,
"can't allocate register resources\n");
AHD_UNCORRECTABLE_ERROR(ahd);
return (ENOMEM);
}
ahd->tags[0] = rman_get_bustag(regs);
ahd->bshs[0] = rman_get_bushandle(regs);
/* And now the second BAR */
regs_id2 = AHD_PCI_IOADDR1;
regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
&regs_id2, RF_ACTIVE);
if (regs2 == NULL) {
device_printf(ahd->dev_softc,
"can't allocate register resources\n");
AHD_UNCORRECTABLE_ERROR(ahd);
return (ENOMEM);
}
ahd->tags[1] = rman_get_bustag(regs2);
ahd->bshs[1] = rman_get_bushandle(regs2);
command &= ~PCIM_CMD_MEMEN;
aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
command, /*bytes*/1);
ahd->platform_data->regs_res_type[1] = regs_type;
ahd->platform_data->regs_res_id[1] = regs_id2;
ahd->platform_data->regs[1] = regs2;
}
ahd->platform_data->regs_res_type[0] = regs_type;
ahd->platform_data->regs_res_id[0] = regs_id;
ahd->platform_data->regs[0] = regs;
return (0);
}
int
ahd_pci_map_int(struct ahd_softc *ahd)
{
int zero;
zero = 0;
ahd->platform_data->irq =
bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
RF_ACTIVE | RF_SHAREABLE);
if (ahd->platform_data->irq == NULL)
return (ENOMEM);
ahd->platform_data->irq_res_type = SYS_RES_IRQ;
return (ahd_map_int(ahd));
}