1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcireg.h>
59 	uint16_t domain;  member
84     "Enable support for PCI-e memory mapped config access");
86 static uint32_t	pci_docfgregread(int domain, int bus, int slot, int func,
88 static struct pcie_mcfg_region *pcie_lookup_region(int domain, int bus);
101  * numbers in the range 128-254 to indicate something strange and
128 		PRVERB(("pcibios: BIOS_PRESENT didn't return 'PCI ' in edx\n"));  in pcibios_get_version()
135  * Initialise access to PCI configuration space 
156 	/* $PIR requires PCI BIOS 2.10 or greater. */  in pci_cfgregopen()
164 pcie_lookup_region(int domain, int bus)  in pcie_lookup_region()  argument
167 		if (mcfg_regions[i].domain == domain &&  in pcie_lookup_region()
175 pci_docfgregread(int domain, int bus, int slot, int func, int reg, int bytes)  in pci_docfgregread()  argument
177 	if (domain == 0 && bus == 0 && (1 << slot & pcie_badslots) != 0)  in pci_docfgregread()
183 		region = pcie_lookup_region(domain, bus);  in pci_docfgregread()
189 	if (domain == 0)  in pci_docfgregread()
192 		return (-1);  in pci_docfgregread()
199 pci_cfgregread(int domain, int bus, int slot, int func, int reg, int bytes)  in pci_cfgregread()  argument
209 		line = pci_docfgregread(domain, bus, slot, func, PCIR_INTLINE,  in pci_cfgregread()
213 	return (pci_docfgregread(domain, bus, slot, func, reg, bytes));  in pci_cfgregread()
220 pci_cfgregwrite(int domain, int bus, int slot, int func, int reg, uint32_t data,  in pci_cfgregwrite()  argument
223 	if (domain == 0 && bus == 0 && (1 << slot & pcie_badslots) != 0) {  in pci_cfgregwrite()
231 		region = pcie_lookup_region(domain, bus);  in pci_cfgregwrite()
239 	if (domain == 0)  in pci_cfgregwrite()
259 	    && (reg & (bytes - 1)) == 0) {  in pci_cfgenable()
301 	int data = -1;  in pcireg_cfgread()
390 		printf("-- nothing found\n");  in pci_cfgcheck()
502 		pcielist = &pcie_list[pc->pc_cpuid];  in pcie_init_cache()
509 			elem->vapage = va + (i * PAGE_SIZE);  in pcie_init_cache()
510 			elem->papage = 0;  in pcie_init_cache()
525 	 * inaccessible using memory-mapped PCI config access.  Walk  in pcie_init_badslots()
543 pcie_cfgregopen(uint64_t base, uint16_t domain, uint8_t minbus, uint8_t maxbus)  in pcie_cfgregopen()  argument
553 	    "PCI: MCFG domain %u bus %u-%u base 0x%jx too high\n",  in pcie_cfgregopen()
554 			domain, minbus, maxbus, (uintmax_t)base);  in pcie_cfgregopen()
559 		printf("PCI: MCFG domain %u bus %u-%u base @ 0x%jx\n",  in pcie_cfgregopen()
560 		    domain, minbus, maxbus, (uintmax_t)base);  in pcie_cfgregopen()
564 			pcie_cache_initted = -1;  in pcie_cfgregopen()
569 	if (pcie_cache_initted == -1)  in pcie_cfgregopen()
577 	region->base = base + (minbus << 20);  in pcie_cfgregopen()
578 	region->domain = domain;  in pcie_cfgregopen()
579 	region->minbus = minbus;  in pcie_cfgregopen()
580 	region->maxbus = maxbus;  in pcie_cfgregopen()
586 	if (domain == 0 && minbus == 0)  in pcie_cfgregopen()
607 	MPASS(bus >= region->minbus && bus <= region->maxbus);  in pciereg_findaddr()
609 	pa = PCIE_PADDR(region->base, reg, bus - region->minbus, slot, func);  in pciereg_findaddr()
620 		if (elem->papage == papage)  in pciereg_findaddr()
626 		if (elem->papage != 0) {  in pciereg_findaddr()
627 			pmap_kremove(elem->vapage);  in pciereg_findaddr()
628 			invlpg(elem->vapage);  in pciereg_findaddr()
630 		pmap_kenter(elem->vapage, papage);  in pciereg_findaddr()
631 		elem->papage = papage;  in pciereg_findaddr()
638 	return (elem->vapage | (pa & PAGE_MASK));  in pciereg_findaddr()
643  * have a requirement that all accesses to the memory mapped PCI configuration
654 	int data = -1;  in pciereg_cfgread()
657 		return (-1);  in pciereg_cfgread()