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/*
* Copyright © 2008 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <err.h>
#include <assert.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include "i915_drm.h"
#include "intel_chipset.h"
/**
* SECTION:intel_chipset
* @short_description: Feature macros and chipset helpers
* @title: intel chipset
*
* > #include "intel_chipset.h"
*
* This library mostly provides feature macros which use raw pci device ids. It
* also provides a few more helper functions to handle pci devices, chipset
* detection and related issues.
*/
/**
* intel_pch:
*
* Global variable to keep track of the pch type. Can either be set manually or
* detected at runtime with intel_check_pch().
*/
enum pch_type intel_pch;
/**
* intel_get_pci_device:
*
* Looks up the main graphics pci device using libpciaccess.
*
* Returns:
* The pci_device, exits the program on any failures.
*/
struct pci_device *
intel_get_pci_device(void)
{
struct pci_device *pci_dev;
int error;
error = pci_system_init();
if (error != 0) {
fprintf(stderr, "Couldn't initialize PCI system: %s\n",
strerror(error));
exit(1);
}
/* Grab the graphics card. Try the canonical slot first, then
* walk the entire PCI bus for a matching device. */
pci_dev = pci_device_find_by_slot(0, 0, 2, 0);
if (pci_dev == NULL || pci_dev->vendor_id != 0x8086) {
struct pci_device_iterator *iter;
struct pci_id_match match;
match.vendor_id = 0x8086; /* Intel */
match.device_id = PCI_MATCH_ANY;
match.subvendor_id = PCI_MATCH_ANY;
match.subdevice_id = PCI_MATCH_ANY;
match.device_class = 0x3 << 16;
match.device_class_mask = 0xff << 16;
match.match_data = 0;
iter = pci_id_match_iterator_create(&match);
pci_dev = pci_device_next(iter);
pci_iterator_destroy(iter);
}
if (pci_dev == NULL)
errx(1, "Couldn't find graphics card");
error = pci_device_probe(pci_dev);
if (error != 0) {
fprintf(stderr, "Couldn't probe graphics card: %s\n",
strerror(error));
exit(1);
}
if (pci_dev->vendor_id != 0x8086)
errx(1, "Graphics card is non-intel");
return pci_dev;
}
/**
* intel_get_drm_devid:
* @fd: open i915 drm file descriptor
*
* Queries the kernel for the pci device id corresponding to the drm file
* descriptor.
*
* Returns:
* The devid, exits the program on any failures.
*/
uint32_t
intel_get_drm_devid(int fd)
{
int ret;
struct drm_i915_getparam gp;
uint32_t devid;
char *override;
override = getenv("INTEL_DEVID_OVERRIDE");
if (override) {
devid = strtod(override, NULL);
} else {
gp.param = I915_PARAM_CHIPSET_ID;
gp.value = (int *)&devid;
ret = ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp));
assert(ret == 0);
}
return devid;
}
/**
* intel_gen:
* @devid: pci device id
*
* Computes the Intel GFX generation for the give device id.
*
* Returns:
* The GFX generation on successful lookup, -1 on failure.
*/
int intel_gen(uint32_t devid)
{
if (IS_GEN2(devid))
return 2;
if (IS_GEN3(devid))
return 3;
if (IS_GEN4(devid))
return 4;
if (IS_GEN5(devid))
return 5;
if (IS_GEN6(devid))
return 6;
if (IS_GEN7(devid))
return 7;
if (IS_GEN8(devid))
return 8;
return -1;
}
/**
* intel_check_pch:
*
* Detects the PCH chipset type of the running systems and fills in the results
* into the global #intel_pch varaible.
*/
void
intel_check_pch(void)
{
struct pci_device *pch_dev;
pch_dev = pci_device_find_by_slot(0, 0, 31, 0);
if (pch_dev == NULL)
return;
if (pch_dev->vendor_id != 0x8086)
return;
switch (pch_dev->device_id & 0xff00) {
case 0x3b00:
intel_pch = PCH_IBX;
break;
case 0x1c00:
case 0x1e00:
intel_pch = PCH_CPT;
break;
case 0x8c00:
case 0x9c00:
intel_pch = PCH_LPT;
break;
default:
intel_pch = PCH_NONE;
return;
}
}
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