1 // SPDX-License-Identifier: GPL-2.0
3  * Numascale NumaConnect-specific PCI code
19 static inline char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn)  in pci_dev_base()  argument
21 	struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);  in pci_dev_base()
23 	if (cfg && cfg->virt)  in pci_dev_base()
24 		return cfg->virt + (PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12));  in pci_dev_base()
28 static int pci_mmcfg_read_numachip(unsigned int seg, unsigned int bus,  in pci_mmcfg_read_numachip()  argument
31 	char __iomem *addr;  in pci_mmcfg_read_numachip()  local
33 	/* Why do we have this when nobody checks it. How about a BUG()!? -AK */  in pci_mmcfg_read_numachip()
34 	if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) {  in pci_mmcfg_read_numachip()
35 err:		*value = -1;  in pci_mmcfg_read_numachip()
36 		return -EINVAL;  in pci_mmcfg_read_numachip()
40 	if (unlikely(bus == 0 && devfn >= limit)) {  in pci_mmcfg_read_numachip()
41 		*value = -1;  in pci_mmcfg_read_numachip()
46 	addr = pci_dev_base(seg, bus, devfn);  in pci_mmcfg_read_numachip()
47 	if (!addr) {  in pci_mmcfg_read_numachip()
54 		*value = mmio_config_readb(addr + reg);  in pci_mmcfg_read_numachip()
57 		*value = mmio_config_readw(addr + reg);  in pci_mmcfg_read_numachip()
60 		*value = mmio_config_readl(addr + reg);  in pci_mmcfg_read_numachip()
68 static int pci_mmcfg_write_numachip(unsigned int seg, unsigned int bus,  in pci_mmcfg_write_numachip()  argument
71 	char __iomem *addr;  in pci_mmcfg_write_numachip()  local
73 	/* Why do we have this when nobody checks it. How about a BUG()!? -AK */  in pci_mmcfg_write_numachip()
74 	if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095)))  in pci_mmcfg_write_numachip()
75 		return -EINVAL;  in pci_mmcfg_write_numachip()
78 	if (unlikely(bus == 0 && devfn >= limit))  in pci_mmcfg_write_numachip()
82 	addr = pci_dev_base(seg, bus, devfn);  in pci_mmcfg_write_numachip()
83 	if (!addr) {  in pci_mmcfg_write_numachip()
85 		return -EINVAL;  in pci_mmcfg_write_numachip()
90 		mmio_config_writeb(addr + reg, value);  in pci_mmcfg_write_numachip()
93 		mmio_config_writew(addr + reg, value);  in pci_mmcfg_write_numachip()
96 		mmio_config_writel(addr + reg, value);  in pci_mmcfg_write_numachip()
114 	/* For remote I/O, restrict bus 0 access to the actual number of AMD  in pci_numachip_init()
123 	/* Use NumaChip PCI accessors for non-extended and extended access */  in pci_numachip_init()