1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <linux/pci-acpi.h>
14 #include <linux/pci-ecam.h>
20 	u16			segment;  member
30 	u16 segment;  member
37 						((end) - (start) + 1),	\
42 /*	{ OEM_ID, OEM_TABLE_ID, REV, SEGMENT, BUS_RANGE, ops, cfgres }, */
56 	AL_ECAM("GRAVITON", 0, 7, &al_pcie_ops),
68 	QCOM_ECAM32(7),
93 	{ "CAVIUM", "THUNDERX", rev, 7 + (10 * (node)), MCFG_BUS_ANY,	    \
110 	THUNDER_PEM_QUIRK(2, 0),	/* off-chip devices */
111 	THUNDER_PEM_QUIRK(2, 1),	/* off-chip devices */
136 	/* X-Gene SoC with v1 PCIe controller */
147 	/* X-Gene SoC with v2.1 PCIe controller */
150 	/* X-Gene SoC with v2.2 PCIe controller */
165 	ALTRA_ECAM_QUIRK(1, 7),
194 	LOONGSON_ECAM_MCFG("\0", 7),
195 	LOONGSON_ECAM_MCFG("LOONGSON", 7),
203 static int pci_mcfg_quirk_matches(struct mcfg_fixup *f, u16 segment,  in pci_mcfg_quirk_matches()  argument
206 	if (!memcmp(f->oem_id, mcfg_oem_id, ACPI_OEM_ID_SIZE) &&  in pci_mcfg_quirk_matches()
207 	    !memcmp(f->oem_table_id, mcfg_oem_table_id,  in pci_mcfg_quirk_matches()
209 	    f->oem_revision == mcfg_oem_revision &&  in pci_mcfg_quirk_matches()
210 	    f->segment == segment &&  in pci_mcfg_quirk_matches()
211 	    resource_contains(&f->bus_range, bus_range))  in pci_mcfg_quirk_matches()
223 	u16 segment = root->segment;  in pci_mcfg_apply_quirks()  local
224 	struct resource *bus_range = &root->secondary;  in pci_mcfg_apply_quirks()
229 		if (pci_mcfg_quirk_matches(f, segment, bus_range)) {  in pci_mcfg_apply_quirks()
230 			if (f->cfgres.start)  in pci_mcfg_apply_quirks()
231 				*cfgres = f->cfgres;  in pci_mcfg_apply_quirks()
232 			if (f->ops)  in pci_mcfg_apply_quirks()
233 				*ecam_ops =  f->ops;  in pci_mcfg_apply_quirks()
234 			dev_info(&root->device->dev, "MCFG quirk: ECAM at %pR for %pR with %ps\n",  in pci_mcfg_apply_quirks()
249 	struct resource *bus_res = &root->secondary;  in pci_mcfg_lookup()
250 	u16 seg = root->segment;  in pci_mcfg_lookup()
255 	if (root->mcfg_addr)  in pci_mcfg_lookup()
262 		if (e->segment == seg && e->bus_start <= bus_res->start &&  in pci_mcfg_lookup()
263 		    e->bus_end >= bus_res->end) {  in pci_mcfg_lookup()
264 			root->mcfg_addr = e->addr;  in pci_mcfg_lookup()
271 	if (root->mcfg_addr) {  in pci_mcfg_lookup()
272 		res.start = root->mcfg_addr + (bus_res->start << 20);  in pci_mcfg_lookup()
273 		res.end = res.start + (resource_size(bus_res) << 20) - 1;  in pci_mcfg_lookup()
285 		return -ENXIO;  in pci_mcfg_lookup()
299 	if (header->length < sizeof(struct acpi_table_mcfg))  in pci_mcfg_parse()
300 		return -EINVAL;  in pci_mcfg_parse()
302 	n = (header->length - sizeof(struct acpi_table_mcfg)) /  in pci_mcfg_parse()
309 		return -ENOMEM;  in pci_mcfg_parse()
312 		e->segment = mptr->pci_segment;  in pci_mcfg_parse()
313 		e->addr =  mptr->address;  in pci_mcfg_parse()
314 		e->bus_start = mptr->start_bus_number;  in pci_mcfg_parse()
315 		e->bus_end = mptr->end_bus_number;  in pci_mcfg_parse()
316 		list_add(&e->list, &pci_mcfg_list);  in pci_mcfg_parse()
321 	memcpy(mcfg_oem_id, header->oem_id, ACPI_OEM_ID_SIZE);  in pci_mcfg_parse()
322 	memcpy(mcfg_oem_table_id, header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE);  in pci_mcfg_parse()
323 	mcfg_oem_revision = header->oem_revision;  in pci_mcfg_parse()
330 /* Interface called by ACPI - parse and save MCFG table */