f20a494e2f
so that plain Debian crda + wireless-regdb can work, alternatively we could disable CRDA and bake in the regdb directly in the kernel, using the CFG80211_INTERNAL_REGDB KConfig. Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
113 lines
4.6 KiB
Diff
113 lines
4.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
|
|
Date: Tue, 13 Jul 2021 20:50:07 +0800
|
|
Subject: [PATCH] PCI: Reinstate "PCI: Coalesce host bridge contiguous
|
|
apertures"
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Built-in graphics on HP EliteDesk 805 G6 doesn't work because graphics
|
|
can't get the BAR it needs:
|
|
pci_bus 0000:00: root bus resource [mem 0x10020200000-0x100303fffff window]
|
|
pci_bus 0000:00: root bus resource [mem 0x10030400000-0x100401fffff window]
|
|
|
|
pci 0000:00:08.1: bridge window [mem 0xd2000000-0xd23fffff]
|
|
pci 0000:00:08.1: bridge window [mem 0x10030000000-0x100401fffff 64bit pref]
|
|
pci 0000:00:08.1: can't claim BAR 15 [mem 0x10030000000-0x100401fffff 64bit pref]: no compatible bridge window
|
|
pci 0000:00:08.1: [mem 0x10030000000-0x100401fffff 64bit pref] clipped to [mem 0x10030000000-0x100303fffff 64bit pref]
|
|
pci 0000:00:08.1: bridge window [mem 0x10030000000-0x100303fffff 64bit pref]
|
|
pci 0000:07:00.0: can't claim BAR 0 [mem 0x10030000000-0x1003fffffff 64bit pref]: no compatible bridge window
|
|
pci 0000:07:00.0: can't claim BAR 2 [mem 0x10040000000-0x100401fffff 64bit pref]: no compatible bridge window
|
|
|
|
However, the root bus has two contiguous apertures that can contain the
|
|
child resource requested.
|
|
|
|
Coalesce contiguous apertures so we can allocate from the entire contiguous
|
|
region.
|
|
|
|
This is the second take of commit 65db04053efe ("PCI: Coalesce host
|
|
bridge contiguous apertures"). The original approach sorts the apertures
|
|
by address, but that makes NVMe stop working on QEMU ppc:sam460ex:
|
|
PCI host bridge to bus 0002:00
|
|
pci_bus 0002:00: root bus resource [io 0x0000-0xffff]
|
|
pci_bus 0002:00: root bus resource [mem 0xd80000000-0xdffffffff] (bus address [0x80000000-0xffffffff])
|
|
pci_bus 0002:00: root bus resource [mem 0xc0ee00000-0xc0eefffff] (bus address [0x00000000-0x000fffff])
|
|
|
|
After the offending commit:
|
|
PCI host bridge to bus 0002:00
|
|
pci_bus 0002:00: root bus resource [io 0x0000-0xffff]
|
|
pci_bus 0002:00: root bus resource [mem 0xc0ee00000-0xc0eefffff] (bus address [0x00000000-0x000fffff])
|
|
pci_bus 0002:00: root bus resource [mem 0xd80000000-0xdffffffff] (bus address [0x80000000-0xffffffff])
|
|
|
|
Since the apertures on HP EliteDesk 805 G6 are already in ascending
|
|
order, doing a precautious sorting is not necessary.
|
|
|
|
Remove the sorting part to avoid the regression on ppc:sam460ex.
|
|
|
|
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=212013
|
|
Cc: Guenter Roeck <linux@roeck-us.net>
|
|
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
|
|
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
|
|
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
|
|
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
|
|
---
|
|
drivers/pci/probe.c | 31 +++++++++++++++++++++++++++----
|
|
1 file changed, 27 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
|
|
index 6b73e9179111..50eef5b211f4 100644
|
|
--- a/drivers/pci/probe.c
|
|
+++ b/drivers/pci/probe.c
|
|
@@ -883,11 +883,11 @@ static void pci_set_bus_msi_domain(struct pci_bus *bus)
|
|
static int pci_register_host_bridge(struct pci_host_bridge *bridge)
|
|
{
|
|
struct device *parent = bridge->dev.parent;
|
|
- struct resource_entry *window, *n;
|
|
+ struct resource_entry *window, *next, *n;
|
|
struct pci_bus *bus, *b;
|
|
- resource_size_t offset;
|
|
+ resource_size_t offset, next_offset;
|
|
LIST_HEAD(resources);
|
|
- struct resource *res;
|
|
+ struct resource *res, *next_res;
|
|
char addr[64], *fmt;
|
|
const char *name;
|
|
int err;
|
|
@@ -970,11 +970,34 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
|
|
if (nr_node_ids > 1 && pcibus_to_node(bus) == NUMA_NO_NODE)
|
|
dev_warn(&bus->dev, "Unknown NUMA node; performance will be reduced\n");
|
|
|
|
+ /* Coalesce contiguous windows */
|
|
+ resource_list_for_each_entry_safe(window, n, &resources) {
|
|
+ if (list_is_last(&window->node, &resources))
|
|
+ break;
|
|
+
|
|
+ next = list_next_entry(window, node);
|
|
+ offset = window->offset;
|
|
+ res = window->res;
|
|
+ next_offset = next->offset;
|
|
+ next_res = next->res;
|
|
+
|
|
+ if (res->flags != next_res->flags || offset != next_offset)
|
|
+ continue;
|
|
+
|
|
+ if (res->end + 1 == next_res->start) {
|
|
+ next_res->start = res->start;
|
|
+ res->flags = res->start = res->end = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
/* Add initial resources to the bus */
|
|
resource_list_for_each_entry_safe(window, n, &resources) {
|
|
- list_move_tail(&window->node, &bridge->windows);
|
|
offset = window->offset;
|
|
res = window->res;
|
|
+ if (!res->end)
|
|
+ continue;
|
|
+
|
|
+ list_move_tail(&window->node, &bridge->windows);
|
|
|
|
if (res->flags & IORESOURCE_BUS)
|
|
pci_bus_insert_busn_res(bus, bus->number, res->end);
|