1 // SPDX-License-Identifier: GPL-2.0
22 #include <asm/pci-direct.h>
32 static void __init fix_hypertransport_config(int num, int slot, int func)  in fix_hypertransport_config()  argument
36 	 * we found a hypertransport bus  in fix_hypertransport_config()
38 	 * interrupts to all cpus on the ht bus  in fix_hypertransport_config()
41 	htcfg = read_pci_config(num, slot, func, 0x68);  in fix_hypertransport_config()
44 				 "on hypertransport bus\n");  in fix_hypertransport_config()
51 			write_pci_config(num, slot, func, 0x68, htcfg);  in fix_hypertransport_config()
58 static void __init via_bugs(int  num, int slot, int func)  in via_bugs()  argument
81 static void __init nvidia_bugs(int num, int slot, int func)  in nvidia_bugs()  argument
86 	 * Only applies to Nvidia root ports (bus 0) and not to  in nvidia_bugs()
89 	if (num)  in nvidia_bugs()
112 	/* RED-PEN skip them on mptables too? */  in nvidia_bugs()
117 static u32 __init ati_ixp4x0_rev(int num, int slot, int func)  in ati_ixp4x0_rev()  argument
122 	b = read_pci_config_byte(num, slot, func, 0xac);  in ati_ixp4x0_rev()
124 	write_pci_config_byte(num, slot, func, 0xac, b);  in ati_ixp4x0_rev()
126 	d = read_pci_config(num, slot, func, 0x70);  in ati_ixp4x0_rev()
128 	write_pci_config(num, slot, func, 0x70, d);  in ati_ixp4x0_rev()
130 	d = read_pci_config(num, slot, func, 0x8);  in ati_ixp4x0_rev()
135 static void __init ati_bugs(int num, int slot, int func)  in ati_bugs()  argument
143 	d = ati_ixp4x0_rev(num, slot, func);  in ati_bugs()
161 static u32 __init ati_sbx00_rev(int num, int slot, int func)  in ati_sbx00_rev()  argument
165 	d = read_pci_config(num, slot, func, 0x8);  in ati_sbx00_rev()
171 static void __init ati_bugs_contd(int num, int slot, int func)  in ati_bugs_contd()  argument
175 	rev = ati_sbx00_rev(num, slot, func);  in ati_bugs_contd()
191 	d = read_pci_config(num, slot, func, 0x64);  in ati_bugs_contd()
203 static void __init ati_bugs(int num, int slot, int func)  in ati_bugs()  argument
207 static void __init ati_bugs_contd(int num, int slot, int func)  in ati_bugs_contd()  argument
212 static void __init intel_remapping_check(int num, int slot, int func)  in intel_remapping_check()  argument
217 	device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);  in intel_remapping_check()
218 	revision = read_pci_config_byte(num, slot, func, PCI_REVISION_ID);  in intel_remapping_check()
297  * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size.
299 static resource_size_t __init i830_stolen_base(int num, int slot, int func,  in i830_stolen_base()  argument
302 	return i830_mem_size() - i830_tseg_size() - stolen_size;  in i830_stolen_base()
305 static resource_size_t __init i845_stolen_base(int num, int slot, int func,  in i845_stolen_base()  argument
308 	return i830_mem_size() - i845_tseg_size() - stolen_size;  in i845_stolen_base()
311 static resource_size_t __init i85x_stolen_base(int num, int slot, int func,  in i85x_stolen_base()  argument
314 	return i85x_mem_size() - i85x_tseg_size() - stolen_size;  in i85x_stolen_base()
317 static resource_size_t __init i865_stolen_base(int num, int slot, int func,  in i865_stolen_base()  argument
327 static resource_size_t __init gen3_stolen_base(int num, int slot, int func,  in gen3_stolen_base()  argument
337 	bsm = read_pci_config(num, slot, func, INTEL_BSM);  in gen3_stolen_base()
342 static resource_size_t __init gen11_stolen_base(int num, int slot, int func,  in gen11_stolen_base()  argument
347 	bsm = read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW0);  in gen11_stolen_base()
349 	bsm |= (u64)read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW1) << 32;  in gen11_stolen_base()
354 static resource_size_t __init i830_stolen_size(int num, int slot, int func)  in i830_stolen_size()  argument
375 static resource_size_t __init gen3_stolen_size(int num, int slot, int func)  in gen3_stolen_size()  argument
404 static resource_size_t __init gen6_stolen_size(int num, int slot, int func)  in gen6_stolen_size()  argument
409 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);  in gen6_stolen_size()
415 static resource_size_t __init gen8_stolen_size(int num, int slot, int func)  in gen8_stolen_size()  argument
420 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);  in gen8_stolen_size()
426 static resource_size_t __init chv_stolen_size(int num, int slot, int func)  in chv_stolen_size()  argument
431 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);  in chv_stolen_size()
442 		return (gms - 0x11) * MB(4) + MB(8);  in chv_stolen_size()
444 		return (gms - 0x17) * MB(4) + MB(36);  in chv_stolen_size()
447 static resource_size_t __init gen9_stolen_size(int num, int slot, int func)  in gen9_stolen_size()  argument
452 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);  in gen9_stolen_size()
460 		return (gms - 0xf0) * MB(4) + MB(4);  in gen9_stolen_size()
464 	resource_size_t (*stolen_size)(int num, int slot, int func);
465 	resource_size_t (*stolen_base)(int num, int slot, int func,
567 intel_graphics_stolen(int num, int slot, int func,  in intel_graphics_stolen()  argument
573 	size = early_ops->stolen_size(num, slot, func);  in intel_graphics_stolen()
574 	base = early_ops->stolen_base(num, slot, func, size);  in intel_graphics_stolen()
579 	end = base + size - 1;  in intel_graphics_stolen()
592 static void __init intel_graphics_quirks(int num, int slot, int func)  in intel_graphics_quirks()  argument
605 	device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);  in intel_graphics_quirks()
615 		intel_graphics_stolen(num, slot, func, early_ops);  in intel_graphics_quirks()
621 static void __init force_disable_hpet(int num, int slot, int func)  in force_disable_hpet()  argument
634 static void __init apple_airport_reset(int bus, int slot, int func)  in apple_airport_reset()  argument
645 	pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL);  in apple_airport_reset()
649 		write_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL, pmcsr);  in apple_airport_reset()
652 		pmcsr = read_pci_config_16(bus, slot, func, BCM4331_PM_CAP + PCI_PM_CTRL);  in apple_airport_reset()
655 			       bus, slot, func);  in apple_airport_reset()
660 	addr  =      read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_0);  in apple_airport_reset()
661 	addr |= (u64)read_pci_config(bus, slot, func, PCI_BASE_ADDRESS_1) << 32;  in apple_airport_reset()
667 		       bus, slot, func);  in apple_airport_reset()
696 	void (*f)(int num, int slot, int func);
720 	 * problems: it will halt in deep idle state - so we disable it.
724 …tp://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000-datasheet-vol-1.pdf
733 static void __init early_pci_scan_bus(int bus);
736  * check_dev_quirk - apply early quirks to a given PCI device
737  * @num: bus number
746 static int __init check_dev_quirk(int num, int slot, int func)  in check_dev_quirk()  argument
755 	class = read_pci_config_16(num, slot, func, PCI_CLASS_DEVICE);  in check_dev_quirk()
758 		return -1; /* no class, treat as single function */  in check_dev_quirk()
760 	vendor = read_pci_config_16(num, slot, func, PCI_VENDOR_ID);  in check_dev_quirk()
762 	device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);  in check_dev_quirk()
773 					early_qrk[i].f(num, slot, func);  in check_dev_quirk()
778 	type = read_pci_config_byte(num, slot, func,  in check_dev_quirk()
782 		sec = read_pci_config_byte(num, slot, func, PCI_SECONDARY_BUS);  in check_dev_quirk()
783 		if (sec > num)  in check_dev_quirk()
788 		return -1;  in check_dev_quirk()
793 static void __init early_pci_scan_bus(int bus)  in early_pci_scan_bus()  argument
801 			if (check_dev_quirk(bus, slot, func))  in early_pci_scan_bus()