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[src/trunk]: src/sys/dev/pci Add support for Enhanced Allocations as seen in ...
details: https://anonhg.NetBSD.org/src/rev/62ffda042794
branches: trunk
changeset: 948708:62ffda042794
user: skrll <skrll%NetBSD.org@localhost>
date: Tue Dec 29 15:39:59 2020 +0000
description:
Add support for Enhanced Allocations as seen in the Cavium ThunderX based
GIGABYTE MT30-GS2-00
>From thorpej@. Thanks!
diffstat:
sys/dev/pci/pci_map.c | 257 +++++++++++++++++++++++++++++++++++++++++++++++++-
sys/dev/pci/pciconf.c | 14 ++-
2 files changed, 266 insertions(+), 5 deletions(-)
diffs (truncated from 335 to 300 lines):
diff -r 4a35c880963a -r 62ffda042794 sys/dev/pci/pci_map.c
--- a/sys/dev/pci/pci_map.c Tue Dec 29 13:33:03 2020 +0000
+++ b/sys/dev/pci/pci_map.c Tue Dec 29 15:39:59 2020 +0000
@@ -1,7 +1,7 @@
-/* $NetBSD: pci_map.c,v 1.41 2020/12/28 12:38:44 skrll Exp $ */
+/* $NetBSD: pci_map.c,v 1.42 2020/12/29 15:39:59 skrll Exp $ */
/*-
- * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
+ * Copyright (c) 1998, 2000, 2020 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
@@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pci_map.c,v 1.41 2020/12/28 12:38:44 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pci_map.c,v 1.42 2020/12/29 15:39:59 skrll Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -244,6 +244,252 @@
return 0;
}
+static const char *
+bar_type_string(pcireg_t type)
+{
+ if (PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_IO)
+ return "IO";
+
+ switch (PCI_MAPREG_MEM_TYPE(type)) {
+ case PCI_MAPREG_MEM_TYPE_32BIT:
+ return "MEM32";
+ case PCI_MAPREG_MEM_TYPE_32BIT_1M:
+ return "MEM32-1M";
+ case PCI_MAPREG_MEM_TYPE_64BIT:
+ return "MEM64";
+ }
+ return "<UNKNOWN>";
+}
+
+enum {
+ EA_ptr_dw0 = 0,
+ EA_ptr_base_lower = 1,
+ EA_ptr_base_upper = 2,
+ EA_ptr_maxoffset_lower = 3,
+ EA_ptr_maxoffset_upper = 4,
+
+ EA_PTR_COUNT = 5
+};
+
+struct pci_ea_entry {
+ /* entry field pointers */
+ int ea_ptrs[EA_PTR_COUNT];
+
+ /* Raw register values. */
+ pcireg_t dw0;
+ pcireg_t base_lower;
+ pcireg_t base_upper;
+ pcireg_t maxoffset_lower;
+ pcireg_t maxoffset_upper;
+
+ /* Interesting tidbits derived from them. */
+ uint64_t base;
+ uint64_t maxoffset;
+ unsigned int bei;
+ unsigned int props[2];
+ bool base_is_64;
+ bool maxoffset_is_64;
+ bool enabled;
+ bool writable;
+};
+
+static int
+pci_ea_lookup(pci_chipset_tag_t pc, pcitag_t tag, int ea_cap_ptr,
+ int reg, struct pci_ea_entry *entryp)
+{
+ struct pci_ea_entry entry = {
+ .ea_ptrs[EA_ptr_dw0] = ea_cap_ptr + 4,
+ };
+ unsigned int i, num_entries;
+ unsigned int wanted_bei;
+ pcireg_t val;
+
+ if (reg >= PCI_BAR0 && reg <= PCI_BAR5)
+ wanted_bei = PCI_EA_BEI_BAR0 + ((reg - PCI_BAR0) / 4);
+ else if (reg == PCI_MAPREG_ROM)
+ wanted_bei = PCI_EA_BEI_EXPROM;
+ else {
+ /* Invalid BAR. */
+ return 1;
+ }
+
+ val = pci_conf_read(pc, tag, ea_cap_ptr + PCI_EA_CAP1);
+ num_entries = __SHIFTOUT(val, PCI_EA_CAP1_NUMENTRIES);
+
+ val = pci_conf_read(pc, tag, PCI_BHLC_REG);
+ if (PCI_HDRTYPE_TYPE(val) == PCI_HDRTYPE_PPB) {
+ /* Need to skip over PCI_EA_CAP2 on PPBs. */
+ entry.ea_ptrs[EA_ptr_dw0] += 4;
+ }
+
+ for (i = 0; i < num_entries; i++) {
+ val = pci_conf_read(pc, tag, entry.ea_ptrs[EA_ptr_dw0]);
+ unsigned int entry_size = __SHIFTOUT(val, PCI_EA_ES);
+
+ entry.bei = __SHIFTOUT(val, PCI_EA_BEI);
+ entry.props[0] = __SHIFTOUT(val, PCI_EA_PP);
+ entry.props[1] = __SHIFTOUT(val, PCI_EA_SP);
+ entry.writable = (val & PCI_EA_W) ? true : false;
+ entry.enabled = (val & PCI_EA_E) ? true : false;
+
+ if (entry.bei != wanted_bei || entry_size == 0) {
+ entry.ea_ptrs[EA_ptr_dw0] += 4 * (entry_size + 1);
+ continue;
+ }
+
+ entry.ea_ptrs[EA_ptr_base_lower] =
+ entry.ea_ptrs[EA_ptr_dw0] + 4;
+ entry.ea_ptrs[EA_ptr_maxoffset_lower] =
+ entry.ea_ptrs[EA_ptr_dw0] + 8;
+
+ /* Base */
+ entry.base_lower = pci_conf_read(pc, tag,
+ entry.ea_ptrs[EA_ptr_base_lower]);
+ entry.base_is_64 =
+ (entry.base_lower & PCI_EA_BASEMAXOFFSET_64BIT)
+ ? true : false;
+ if (entry.base_is_64) {
+ entry.ea_ptrs[EA_ptr_base_upper] =
+ entry.ea_ptrs[EA_ptr_dw0] + 12;
+ entry.base_upper = pci_conf_read(pc, tag,
+ entry.ea_ptrs[EA_ptr_base_upper]);
+ } else {
+ entry.ea_ptrs[EA_ptr_base_upper] = 0;
+ entry.base_upper = 0;
+ }
+
+ entry.base = (entry.base_lower & PCI_EA_LOWMASK) |
+ ((uint64_t)entry.base_upper << 32);
+
+ /* MaxOffset */
+ entry.maxoffset_lower = pci_conf_read(pc, tag,
+ entry.ea_ptrs[EA_ptr_maxoffset_lower]);
+ entry.maxoffset_is_64 =
+ (entry.maxoffset_lower & PCI_EA_BASEMAXOFFSET_64BIT)
+ ? true : false;
+ if (entry.maxoffset_is_64) {
+ entry.ea_ptrs[EA_ptr_maxoffset_upper] =
+ entry.ea_ptrs[EA_ptr_dw0] +
+ (entry.base_is_64 ? 16 : 12);
+ entry.maxoffset_upper = pci_conf_read(pc, tag,
+ entry.ea_ptrs[EA_ptr_maxoffset_upper]);
+ } else {
+ entry.ea_ptrs[EA_ptr_maxoffset_upper] = 0;
+ entry.maxoffset_upper = 0;
+ }
+
+ entry.maxoffset = (entry.maxoffset_lower & PCI_EA_LOWMASK) |
+ ((uint64_t)entry.maxoffset_upper << 32);
+
+ if (entryp)
+ *entryp = entry;
+ return 0;
+ }
+ return 1;
+}
+
+static int
+pci_ea_find(pci_chipset_tag_t pc, pcitag_t tag, int ea_cap_ptr,
+ int reg, pcireg_t type, bus_addr_t *basep, bus_size_t *sizep, int *flagsp,
+ struct pci_ea_entry *entryp)
+{
+
+ struct pci_ea_entry entry;
+ int rv = pci_ea_lookup(pc, tag, ea_cap_ptr, reg, &entry);
+ if (rv)
+ return rv;
+
+ pcireg_t wanted_type;
+ if (PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_IO)
+ wanted_type = PCI_MAPREG_TYPE_IO;
+ else {
+ /*
+ * This covers ROM as well. We allow any user-specified
+ * memory type to match an EA memory region with no regard
+ * for 32 vs. 64.
+ *
+ * XXX Should it?
+ */
+ wanted_type = PCI_MAPREG_TYPE_MEM;
+ }
+
+ /*
+ * MaxOffset is the last offset where you can issue a
+ * 32-bit read in the region. Therefore, the size of
+ * the region is MaxOffset + 4.
+ */
+ uint64_t region_size = entry.maxoffset + 4;
+
+ unsigned int which_prop;
+ for (which_prop = 0; which_prop < 2; which_prop++) {
+ int mapflags = 0;
+
+ switch (entry.props[which_prop]) {
+ case PCI_EA_PROP_MEM_PREF:
+ mapflags |= BUS_SPACE_MAP_PREFETCHABLE;
+ /* FALLTHROUGH */
+ case PCI_EA_PROP_MEM_NONPREF:
+ if (PCI_MAPREG_TYPE(wanted_type) != PCI_MAPREG_TYPE_MEM)
+ goto unexpected_type;
+ break;
+
+ case PCI_EA_PROP_IO:
+ if (PCI_MAPREG_TYPE(wanted_type) != PCI_MAPREG_TYPE_IO)
+ goto unexpected_type;
+ break;
+
+ case PCI_EA_PROP_MEM_UNAVAIL:
+ case PCI_EA_PROP_IO_UNAVAIL:
+ case PCI_EA_PROP_UNAVAIL:
+ return 1;
+
+ /* XXX Don't support these yet. */
+ case PCI_EA_PROP_VF_MEM_PREF:
+ case PCI_EA_PROP_VF_MEM_NONPREF:
+ case PCI_EA_PROP_BB_MEM_PREF:
+ case PCI_EA_PROP_BB_MEM_NONPREF:
+ case PCI_EA_PROP_BB_IO:
+ default:
+ printf("%s: bei %u props[%u]=0x%x\n",
+ __func__, entry.bei, which_prop,
+ entry.props[which_prop]);
+ continue;
+ continue;
+ }
+
+ if ((sizeof(uint64_t) > sizeof(bus_addr_t) ||
+ PCI_MAPREG_TYPE(wanted_type) == PCI_MAPREG_TYPE_IO) &&
+ (entry.base + region_size) > 0x100000000ULL) {
+ goto inaccessible_64bit_region;
+ }
+
+ *basep = (bus_addr_t)entry.base;
+ *sizep = (bus_size_t)region_size;
+ *flagsp = mapflags;
+ if (entryp)
+ *entryp = entry;
+ return 0;
+ }
+
+ /* BAR not found. */
+ return 1;
+
+ unexpected_type:
+ printf("%s: unexpected type; wanted %s, got 0x%02x\n",
+ __func__, bar_type_string(wanted_type), entry.props[which_prop]);
+ return 1;
+
+ inaccessible_64bit_region:
+ if (PCI_MAPREG_TYPE(wanted_type) == PCI_MAPREG_TYPE_IO) {
+ printf("%s: 64-bit IO regions are unsupported\n",
+ __func__);
+ return 1;
+ }
+ printf("%s: 64-bit memory region inaccessible on 32-bit platform\n",
+ __func__);
+ return 1;
+}
+
#define _PCI_MAPREG_TYPEBITS(reg) \
(PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_IO ? \
reg & PCI_MAPREG_TYPE_MASK : \
@@ -295,6 +541,11 @@
pci_mapreg_info(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t type,
bus_addr_t *basep, bus_size_t *sizep, int *flagsp)
{
+ int ea_cap_ptr;
+
+ if (pci_get_capability(pc, tag, PCI_CAP_EA, &ea_cap_ptr, NULL))
+ return pci_ea_find(pc, tag, ea_cap_ptr, reg, type,
+ basep, sizep, flagsp, NULL);
if (PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_IO)
return pci_io_find(pc, tag, reg, type, basep, sizep,
diff -r 4a35c880963a -r 62ffda042794 sys/dev/pci/pciconf.c
--- a/sys/dev/pci/pciconf.c Tue Dec 29 13:33:03 2020 +0000
+++ b/sys/dev/pci/pciconf.c Tue Dec 29 15:39:59 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pciconf.c,v 1.50 2020/10/20 23:03:30 jmcneill Exp $ */
+/* $NetBSD: pciconf.c,v 1.51 2020/12/29 15:39:59 skrll Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
@@ -65,7 +65,7 @@
*/
#include <sys/cdefs.h>
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