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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
*/
#include <asm/sn/types.h>
#include <asm/sn/addrs.h>
#include <asm/sn/pcidev.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/sn_sal.h>
#include "xtalk/hubdev.h"
#include <linux/acpi.h>
/*
* The code in this file will only be executed when running with
* a PROM that has ACPI IO support. (i.e., SN_ACPI_BASE_SUPPORT() == 1)
*/
/*
* This value must match the UUID the PROM uses
* (io/acpi/defblk.c) when building a vendor descriptor.
*/
struct acpi_vendor_uuid sn_uuid = {
.subtype = 0,
.data = { 0x2c, 0xc6, 0xa6, 0xfe, 0x9c, 0x44, 0xda, 0x11,
0xa2, 0x7c, 0x08, 0x00, 0x69, 0x13, 0xea, 0x51 },
};
struct sn_pcidev_match {
u8 bus;
unsigned int devfn;
acpi_handle handle;
};
/*
* Perform the early IO init in PROM.
*/
static long
sal_ioif_init(u64 *result)
{
struct ia64_sal_retval isrv = {0,0,0,0};
SAL_CALL_NOLOCK(isrv,
SN_SAL_IOIF_INIT, 0, 0, 0, 0, 0, 0, 0);
*result = isrv.v0;
return isrv.status;
}
/*
* sn_acpi_hubdev_init() - This function is called by acpi_ns_get_device_callback()
* for all SGIHUB and SGITIO acpi devices defined in the
* DSDT. It obtains the hubdev_info pointer from the
* ACPI vendor resource, which the PROM setup, and sets up the
* hubdev_info in the pda.
*/
static acpi_status __init
sn_acpi_hubdev_init(acpi_handle handle, u32 depth, void *context, void **ret)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
u64 addr;
struct hubdev_info *hubdev;
struct hubdev_info *hubdev_ptr;
int i;
u64 nasid;
struct acpi_resource *resource;
acpi_status status;
struct acpi_resource_vendor_typed *vendor;
extern void sn_common_hubdev_init(struct hubdev_info *);
status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
&sn_uuid, &buffer);
if (ACPI_FAILURE(status)) {
acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
printk(KERN_ERR
"sn_acpi_hubdev_init: acpi_get_vendor_resource() "
"(0x%x) failed for: %s\n", status,
(char *)name_buffer.pointer);
kfree(name_buffer.pointer);
return AE_OK; /* Continue walking namespace */
}
resource = buffer.pointer;
vendor = &resource->data.vendor_typed;
if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
sizeof(struct hubdev_info *)) {
acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
printk(KERN_ERR
"sn_acpi_hubdev_init: Invalid vendor data length: "
"%d for: %s\n",
vendor->byte_length, (char *)name_buffer.pointer);
kfree(name_buffer.pointer);
goto exit;
}
memcpy(&addr, vendor->byte_data, sizeof(struct hubdev_info *));
hubdev_ptr = __va((struct hubdev_info *) addr);
nasid = hubdev_ptr->hdi_nasid;
i = nasid_to_cnodeid(nasid);
hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
*hubdev = *hubdev_ptr;
sn_common_hubdev_init(hubdev);
exit:
kfree(buffer.pointer);
return AE_OK; /* Continue walking namespace */
}
/*
* sn_get_bussoft_ptr() - The pcibus_bussoft pointer is found in
* the ACPI Vendor resource for this bus.
*/
static struct pcibus_bussoft *
sn_get_bussoft_ptr(struct pci_bus *bus)
{
u64 addr;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_handle handle;
struct pcibus_bussoft *prom_bussoft_ptr;
struct acpi_resource *resource;
acpi_status status;
struct acpi_resource_vendor_typed *vendor;
handle = PCI_CONTROLLER(bus)->acpi_handle;
status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
&sn_uuid, &buffer);
if (ACPI_FAILURE(status)) {
acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
printk(KERN_ERR "%s: "
"acpi_get_vendor_resource() failed (0x%x) for: %s\n",
__func__, status, (char *)name_buffer.pointer);
kfree(name_buffer.pointer);
return NULL;
}
resource = buffer.pointer;
vendor = &resource->data.vendor_typed;
if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
sizeof(struct pcibus_bussoft *)) {
printk(KERN_ERR
"%s: Invalid vendor data length %d\n",
__func__, vendor->byte_length);
kfree(buffer.pointer);
return NULL;
}
memcpy(&addr, vendor->byte_data, sizeof(struct pcibus_bussoft *));
prom_bussoft_ptr = __va((struct pcibus_bussoft *) addr);
kfree(buffer.pointer);
return prom_bussoft_ptr;
}
/*
* sn_extract_device_info - Extract the pcidev_info and the sn_irq_info
* pointers from the vendor resource using the
* provided acpi handle, and copy the structures
* into the argument buffers.
*/
static int
sn_extract_device_info(acpi_handle handle, struct pcidev_info **pcidev_info,
struct sn_irq_info **sn_irq_info)
{
u64 addr;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct sn_irq_info *irq_info, *irq_info_prom;
struct pcidev_info *pcidev_ptr, *pcidev_prom_ptr;
struct acpi_resource *resource;
int ret = 0;
acpi_status status;
struct acpi_resource_vendor_typed *vendor;
/*
* The pointer to this device's pcidev_info structure in
* the PROM, is in the vendor resource.
*/
status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
&sn_uuid, &buffer);
if (ACPI_FAILURE(status)) {
acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
printk(KERN_ERR
"%s: acpi_get_vendor_resource() failed (0x%x) for: %s\n",
__func__, status, (char *)name_buffer.pointer);
kfree(name_buffer.pointer);
return 1;
}
resource = buffer.pointer;
vendor = &resource->data.vendor_typed;
if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
sizeof(struct pci_devdev_info *)) {
acpi_get_name(handle, ACPI_FULL_PATHNAME, &name_buffer);
printk(KERN_ERR
"%s: Invalid vendor data length: %d for: %s\n",
__func__, vendor->byte_length,
(char *)name_buffer.pointer);
kfree(name_buffer.pointer);
ret = 1;
goto exit;
}
pcidev_ptr = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
if (!pcidev_ptr)
panic("%s: Unable to alloc memory for pcidev_info", __func__);
memcpy(&addr, vendor->byte_data, sizeof(struct pcidev_info *));
pcidev_prom_ptr = __va(addr);
memcpy(pcidev_ptr, pcidev_prom_ptr, sizeof(struct pcidev_info));
/* Get the IRQ info */
irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
if (!irq_info)
panic("%s: Unable to alloc memory for sn_irq_info", __func__);
if (pcidev_ptr->pdi_sn_irq_info) {
irq_info_prom = __va(pcidev_ptr->pdi_sn_irq_info
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