staticvoid set_val(u32 v, int where, int size, u32 *val)
{ int shift = (where & 3) * 8;
pr_debug("set_val %04x: %08x\n", (unsignedint)(where & ~3), v);
v >>= shift; if (size == 1)
v &= 0xff; elseif (size == 2)
v &= 0xffff;
*val = v;
}
staticint handle_ea_bar(u32 e0, int bar, struct pci_bus *bus, unsignedint devfn, int where, int size, u32 *val)
{ void __iomem *addr;
u32 v;
/* Entries are 16-byte aligned; bits[2,3] select word in entry */ int where_a = where & 0xc;
if (where_a == 0) {
set_val(e0, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0x4) {
addr = bus->ops->map_bus(bus, devfn, bar); /* BAR 0 */ if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
v = readl(addr);
v &= ~0xf;
v |= 2; /* EA entry-1. Base-L */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0x8) {
u32 barl_orig;
u32 barl_rb;
addr = bus->ops->map_bus(bus, devfn, bar); /* BAR 0 */ if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
barl_orig = readl(addr + 0);
writel(0xffffffff, addr + 0);
barl_rb = readl(addr + 0);
writel(barl_orig, addr + 0); /* zeros in unsettable bits */
v = ~barl_rb & ~3;
v |= 0xc; /* EA entry-2. Offset-L */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xc) {
addr = bus->ops->map_bus(bus, devfn, bar + 4); /* BAR 1 */ if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
v = readl(addr); /* EA entry-3. Base-H */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} return PCIBIOS_DEVICE_NOT_FOUND;
}
staticint thunder_ecam_p2_config_read(struct pci_bus *bus, unsignedint devfn, int where, int size, u32 *val)
{ struct pci_config_window *cfg = bus->sysdata; int where_a = where & ~3; void __iomem *addr;
u32 node_bits;
u32 v;
/* EA Base[63:32] may be missing some bits ... */ switch (where_a) { case 0xa8: case 0xbc: case 0xd0: case 0xe4: break; default: return pci_generic_config_read(bus, devfn, where, size, val);
}
addr = bus->ops->map_bus(bus, devfn, where_a); if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
v = readl(addr);
/* * Bit 44 of the 64-bit Base must match the same bit in * the config space access window. Since we are working with * the high-order 32 bits, shift everything down by 32 bits.
*/
node_bits = upper_32_bits(cfg->res.start) & (1 << 12);
v |= node_bits;
set_val(v, where, size, val);
return PCIBIOS_SUCCESSFUL;
}
staticint thunder_ecam_config_read(struct pci_bus *bus, unsignedint devfn, int where, int size, u32 *val)
{
u32 v;
u32 vendor_device;
u32 class_rev; void __iomem *addr; int cfg_type; int where_a = where & ~3;
addr = bus->ops->map_bus(bus, devfn, 0xc); if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
v = readl(addr);
/* Check for non type-00 header */
cfg_type = (v >> 16) & 0x7f;
addr = bus->ops->map_bus(bus, devfn, 8); if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
class_rev = readl(addr); if (class_rev == 0xffffffff) goto no_emulation;
/* * All BARs have fixed addresses specified by the EA * capability; they must return zero on read.
*/ if (cfg_type == 0 &&
((where >= 0x10 && where < 0x2c) ||
(where >= 0x1a4 && where < 0x1bc))) { /* BAR or SR-IOV BAR */
*val = 0; return PCIBIOS_SUCCESSFUL;
}
addr = bus->ops->map_bus(bus, devfn, 0); if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
vendor_device = readl(addr); if (vendor_device == 0xffffffff) goto no_emulation;
/* Check for non type-00 header */ if (cfg_type == 0) { bool has_msix; bool is_nic = (vendor_device == 0xa01e177d); bool is_tns = (vendor_device == 0xa01f177d);
addr = bus->ops->map_bus(bus, devfn, 0x70); if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
/* E_CAP */
v = readl(addr);
has_msix = (v & 0xff00) != 0;
if (!has_msix && where_a == 0x70) {
v |= 0xbc00; /* next capability is EA at 0xbc */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xb0) {
addr = bus->ops->map_bus(bus, devfn, where_a); if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
v = readl(addr); if (v & 0xff00)
pr_err("Bad MSI-X cap header: %08x\n", v);
v |= 0xbc00; /* next capability is EA at 0xbc */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xbc) { if (is_nic)
v = 0x40014; /* EA last in chain, 4 entries */ elseif (is_tns)
v = 0x30014; /* EA last in chain, 3 entries */ elseif (has_msix)
v = 0x20014; /* EA last in chain, 2 entries */ else
v = 0x10014; /* EA last in chain, 1 entry */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a >= 0xc0 && where_a < 0xd0) /* EA entry-0. PP=0, BAR0 Size:3 */ return handle_ea_bar(0x80ff0003,
0x10, bus, devfn, where,
size, val); if (where_a >= 0xd0 && where_a < 0xe0 && has_msix) /* EA entry-1. PP=0, BAR4 Size:3 */ return handle_ea_bar(0x80ff0043,
0x20, bus, devfn, where,
size, val); if (where_a >= 0xe0 && where_a < 0xf0 && is_tns) /* EA entry-2. PP=0, BAR2, Size:3 */ return handle_ea_bar(0x80ff0023,
0x18, bus, devfn, where,
size, val); if (where_a >= 0xe0 && where_a < 0xf0 && is_nic) /* EA entry-2. PP=4, VF_BAR0 (9), Size:3 */ return handle_ea_bar(0x80ff0493,
0x1a4, bus, devfn, where,
size, val); if (where_a >= 0xf0 && where_a < 0x100 && is_nic) /* EA entry-3. PP=4, VF_BAR4 (d), Size:3 */ return handle_ea_bar(0x80ff04d3,
0x1b4, bus, devfn, where,
size, val);
} elseif (cfg_type == 1) { bool is_rsl_bridge = devfn == 0x08; bool is_rad_bridge = devfn == 0xa0; bool is_zip_bridge = devfn == 0xa8; bool is_dfa_bridge = devfn == 0xb0; bool is_nic_bridge = devfn == 0x10;
if (where_a == 0x70) {
addr = bus->ops->map_bus(bus, devfn, where_a); if (!addr) return PCIBIOS_DEVICE_NOT_FOUND;
v = readl(addr); if (v & 0xff00)
pr_err("Bad PCIe cap header: %08x\n", v);
v |= 0xbc00; /* next capability is EA at 0xbc */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xbc) { if (is_nic_bridge)
v = 0x10014; /* EA last in chain, 1 entry */ else
v = 0x00014; /* EA last in chain, no entries */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xc0) { if (is_rsl_bridge || is_nic_bridge)
v = 0x0101; /* subordinate:secondary = 1:1 */ elseif (is_rad_bridge)
v = 0x0202; /* subordinate:secondary = 2:2 */ elseif (is_zip_bridge)
v = 0x0303; /* subordinate:secondary = 3:3 */ elseif (is_dfa_bridge)
v = 0x0404; /* subordinate:secondary = 4:4 */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xc4 && is_nic_bridge) { /* Enabled, not-Write, SP=ff, PP=05, BEI=6, ES=4 */
v = 0x80ff0564;
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xc8 && is_nic_bridge) {
v = 0x00000002; /* Base-L 64-bit */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xcc && is_nic_bridge) {
v = 0xfffffffe; /* MaxOffset-L 64-bit */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xd0 && is_nic_bridge) {
v = 0x00008430; /* NIC Base-H */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
} if (where_a == 0xd4 && is_nic_bridge) {
v = 0x0000000f; /* MaxOffset-H */
set_val(v, where, size, val); return PCIBIOS_SUCCESSFUL;
}
}
no_emulation: return pci_generic_config_read(bus, devfn, where, size, val);
}
staticint thunder_ecam_config_write(struct pci_bus *bus, unsignedint devfn, int where, int size, u32 val)
{ /* * All BARs have fixed addresses; ignore BAR writes so they * don't get corrupted.
*/ if ((where >= 0x10 && where < 0x2c) ||
(where >= 0x1a4 && where < 0x1bc)) /* BAR or SR-IOV BAR */ return PCIBIOS_SUCCESSFUL;
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