1 // SPDX-License-Identifier: GPL-2.0
11 #include <linux/pci-ecam.h>
29 static int handle_ea_bar(u32 e0, int bar, struct pci_bus *bus,  in handle_ea_bar()  argument
32 	void __iomem *addr;  in handle_ea_bar()  local
35 	/* Entries are 16-byte aligned; bits[2,3] select word in entry */  in handle_ea_bar()
43 		addr = bus->ops->map_bus(bus, devfn, bar); /* BAR 0 */  in handle_ea_bar()
44 		if (!addr) {  in handle_ea_bar()
48 		v = readl(addr);  in handle_ea_bar()
50 		v |= 2; /* EA entry-1. Base-L */  in handle_ea_bar()
58 		addr = bus->ops->map_bus(bus, devfn, bar); /* BAR 0 */  in handle_ea_bar()
59 		if (!addr) {  in handle_ea_bar()
63 		barl_orig = readl(addr + 0);  in handle_ea_bar()
64 		writel(0xffffffff, addr + 0);  in handle_ea_bar()
65 		barl_rb = readl(addr + 0);  in handle_ea_bar()
66 		writel(barl_orig, addr + 0);  in handle_ea_bar()
69 		v |= 0xc; /* EA entry-2. Offset-L */  in handle_ea_bar()
74 		addr = bus->ops->map_bus(bus, devfn, bar + 4); /* BAR 1 */  in handle_ea_bar()
75 		if (!addr) {  in handle_ea_bar()
79 		v = readl(addr); /* EA entry-3. Base-H */  in handle_ea_bar()
86 static int thunder_ecam_p2_config_read(struct pci_bus *bus, unsigned int devfn,  in thunder_ecam_p2_config_read()  argument
89 	struct pci_config_window *cfg = bus->sysdata;  in thunder_ecam_p2_config_read()
91 	void __iomem *addr;  in thunder_ecam_p2_config_read()  local
103 		return pci_generic_config_read(bus, devfn, where, size, val);  in thunder_ecam_p2_config_read()
106 	addr = bus->ops->map_bus(bus, devfn, where_a);  in thunder_ecam_p2_config_read()
107 	if (!addr) {  in thunder_ecam_p2_config_read()
112 	v = readl(addr);  in thunder_ecam_p2_config_read()
115 	 * Bit 44 of the 64-bit Base must match the same bit in  in thunder_ecam_p2_config_read()
117 	 * the high-order 32 bits, shift everything down by 32 bits.  in thunder_ecam_p2_config_read()
119 	node_bits = upper_32_bits(cfg->res.start) & (1 << 12);  in thunder_ecam_p2_config_read()
127 static int thunder_ecam_config_read(struct pci_bus *bus, unsigned int devfn,  in thunder_ecam_config_read()  argument
133 	void __iomem *addr;  in thunder_ecam_config_read()  local
137 	addr = bus->ops->map_bus(bus, devfn, 0xc);  in thunder_ecam_config_read()
138 	if (!addr) {  in thunder_ecam_config_read()
143 	v = readl(addr);  in thunder_ecam_config_read()
145 	/* Check for non type-00 header */  in thunder_ecam_config_read()
148 	addr = bus->ops->map_bus(bus, devfn, 8);  in thunder_ecam_config_read()
149 	if (!addr) {  in thunder_ecam_config_read()
154 	class_rev = readl(addr);  in thunder_ecam_config_read()
159 		/* Pass-2 handling */  in thunder_ecam_config_read()
162 		return thunder_ecam_p2_config_read(bus, devfn, where,  in thunder_ecam_config_read()
173 		/* BAR or SR-IOV BAR */  in thunder_ecam_config_read()
178 	addr = bus->ops->map_bus(bus, devfn, 0);  in thunder_ecam_config_read()
179 	if (!addr) {  in thunder_ecam_config_read()
184 	vendor_device = readl(addr);  in thunder_ecam_config_read()
188 	pr_debug("%04x:%04x - Fix pass#: %08x, where: %03x, devfn: %03x\n",  in thunder_ecam_config_read()
192 	/* Check for non type-00 header */  in thunder_ecam_config_read()
198 		addr = bus->ops->map_bus(bus, devfn, 0x70);  in thunder_ecam_config_read()
199 		if (!addr) {  in thunder_ecam_config_read()
204 		v = readl(addr);  in thunder_ecam_config_read()
213 			addr = bus->ops->map_bus(bus, devfn, where_a);  in thunder_ecam_config_read()
214 			if (!addr) {  in thunder_ecam_config_read()
218 			v = readl(addr);  in thunder_ecam_config_read()
238 			/* EA entry-0. PP=0, BAR0 Size:3 */  in thunder_ecam_config_read()
240 					     0x10, bus, devfn, where,  in thunder_ecam_config_read()
243 			 /* EA entry-1. PP=0, BAR4 Size:3 */  in thunder_ecam_config_read()
245 					     0x20, bus, devfn, where,  in thunder_ecam_config_read()
248 			/* EA entry-2. PP=0, BAR2, Size:3 */  in thunder_ecam_config_read()
250 					     0x18, bus, devfn, where,  in thunder_ecam_config_read()
253 			/* EA entry-2. PP=4, VF_BAR0 (9), Size:3 */  in thunder_ecam_config_read()
255 					     0x1a4, bus, devfn, where,  in thunder_ecam_config_read()
258 			/* EA entry-3. PP=4, VF_BAR4 (d), Size:3 */  in thunder_ecam_config_read()
260 					     0x1b4, bus, devfn, where,  in thunder_ecam_config_read()
270 			addr = bus->ops->map_bus(bus, devfn, where_a);  in thunder_ecam_config_read()
271 			if (!addr) {  in thunder_ecam_config_read()
275 			v = readl(addr);  in thunder_ecam_config_read()
303 			/* Enabled, not-Write, SP=ff, PP=05, BEI=6, ES=4 */  in thunder_ecam_config_read()
309 			v = 0x00000002; /* Base-L 64-bit */  in thunder_ecam_config_read()
314 			v = 0xfffffffe; /* MaxOffset-L 64-bit */  in thunder_ecam_config_read()
319 			v = 0x00008430; /* NIC Base-H */  in thunder_ecam_config_read()
324 			v = 0x0000000f; /* MaxOffset-H */  in thunder_ecam_config_read()
330 	return pci_generic_config_read(bus, devfn, where, size, val);  in thunder_ecam_config_read()
333 static int thunder_ecam_config_write(struct pci_bus *bus, unsigned int devfn,  in thunder_ecam_config_write()  argument
342 		/* BAR or SR-IOV BAR */  in thunder_ecam_config_write()
345 	return pci_generic_config_write(bus, devfn, where, size, val);  in thunder_ecam_config_write()
360 		.compatible = "cavium,pci-host-thunder-ecam",