drivers/acpi/pci_mcfg.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2016 Broadcom
4  *	Author: Jayachandran C <jchandra@broadcom.com>
5  * Copyright (C) 2016 Semihalf
13 #include <linux/pci-acpi.h>
14 #include <linux/pci-ecam.h>
27 	char oem_id[ACPI_OEM_ID_SIZE + 1];
28 	char oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1];
37 						((end) - (start) + 1),	\
50 	AL_ECAM("GRAVITON", 0, 1, &al_pcie_ops),
59 	{ "QCOM  ", "QDF2432 ", 1, seg, MCFG_BUS_ANY, &pci_32b_ops }
62 	QCOM_ECAM32(1),
72 	{ "HISI  ", table_id, 0, (seg) + 1, MCFG_BUS_ANY, ops }, \
105 	THUNDER_PEM_QUIRK(1, 0),
106 	THUNDER_PEM_QUIRK(1, 1),
107 	THUNDER_ECAM_QUIRK(1, 10),
110 	THUNDER_PEM_QUIRK(2, 0),	/* off-chip devices */
111 	THUNDER_PEM_QUIRK(2, 1),	/* off-chip devices */
113 	THUNDER_ECAM_QUIRK(2,  1),
121 	{ "NVIDIA", "TEGRA194", 1, 0, MCFG_BUS_ANY, &tegra194_pcie_ops},
122 	{ "NVIDIA", "TEGRA194", 1, 1, MCFG_BUS_ANY, &tegra194_pcie_ops},
123 	{ "NVIDIA", "TEGRA194", 1, 2, MCFG_BUS_ANY, &tegra194_pcie_ops},
124 	{ "NVIDIA", "TEGRA194", 1, 3, MCFG_BUS_ANY, &tegra194_pcie_ops},
125 	{ "NVIDIA", "TEGRA194", 1, 4, MCFG_BUS_ANY, &tegra194_pcie_ops},
126 	{ "NVIDIA", "TEGRA194", 1, 5, MCFG_BUS_ANY, &tegra194_pcie_ops},
136 	/* X-Gene SoC with v1 PCIe controller */
137 	XGENE_V1_ECAM_MCFG(1, 0),
138 	XGENE_V1_ECAM_MCFG(1, 1),
139 	XGENE_V1_ECAM_MCFG(1, 2),
140 	XGENE_V1_ECAM_MCFG(1, 3),
141 	XGENE_V1_ECAM_MCFG(1, 4),
143 	XGENE_V1_ECAM_MCFG(2, 1),
147 	/* X-Gene SoC with v2.1 PCIe controller */
149 	XGENE_V2_ECAM_MCFG(3, 1),
150 	/* X-Gene SoC with v2.2 PCIe controller */
152 	XGENE_V2_ECAM_MCFG(4, 1),
158 	ALTRA_ECAM_QUIRK(1, 0),
159 	ALTRA_ECAM_QUIRK(1, 1),
160 	ALTRA_ECAM_QUIRK(1, 2),
161 	ALTRA_ECAM_QUIRK(1, 3),
162 	ALTRA_ECAM_QUIRK(1, 4),
163 	ALTRA_ECAM_QUIRK(1, 5),
164 	ALTRA_ECAM_QUIRK(1, 6),
165 	ALTRA_ECAM_QUIRK(1, 7),
166 	ALTRA_ECAM_QUIRK(1, 8),
167 	ALTRA_ECAM_QUIRK(1, 9),
168 	ALTRA_ECAM_QUIRK(1, 10),
169 	ALTRA_ECAM_QUIRK(1, 11),
170 	ALTRA_ECAM_QUIRK(1, 12),
171 	ALTRA_ECAM_QUIRK(1, 13),
172 	ALTRA_ECAM_QUIRK(1, 14),
173 	ALTRA_ECAM_QUIRK(1, 15),
178 	{ "LOONGS", table_id, 1, seg, MCFG_BUS_ANY, &loongson_pci_ecam_ops }
181 	LOONGSON_ECAM_MCFG("LOONGSON", 0),
182 	LOONGSON_ECAM_MCFG("\0", 1),
183 	LOONGSON_ECAM_MCFG("LOONGSON", 1),
185 	LOONGSON_ECAM_MCFG("LOONGSON", 2),
187 	LOONGSON_ECAM_MCFG("LOONGSON", 3),
189 	LOONGSON_ECAM_MCFG("LOONGSON", 4),
191 	LOONGSON_ECAM_MCFG("LOONGSON", 5),
193 	LOONGSON_ECAM_MCFG("LOONGSON", 6),
195 	LOONGSON_ECAM_MCFG("LOONGSON", 7),
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()
212 		return 1;  in pci_mcfg_quirk_matches()
223 	u16 segment = root->segment;  in pci_mcfg_apply_quirks()
224 	struct resource *bus_range = &root->secondary;  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()
305 	mptr = (struct acpi_mcfg_allocation *) &mcfg[1];  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 */