diff options
| author | Jiaxun Yang <jiaxun.yang@flygoat.com> | 2024-05-17 19:14:50 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-04-22 15:08:47 -0600 |
| commit | fc25cd0e1a1d5bea59c651782b93e70289d68c1f (patch) | |
| tree | cff883672a213bbb19a132a1ba3c2d92c560ed55 | |
| parent | cb5af7aa4f5119faf738542f6c066fa5bb352aa1 (diff) | |
pci: auto: Reduce bridge mem alignment boundary for boston
Boston has a very limited memory range for PCI controllers, where
1MB can't easily fit into it.
Make alignment boundary of PCI memory resource allocation a Kconfig
option and default to 0x10000 for boston.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
| -rw-r--r-- | drivers/pci/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/pci/pci_auto.c | 16 |
2 files changed, 17 insertions, 8 deletions
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index 8d02ab82ad9..289d1deb38b 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -75,6 +75,15 @@ config PCI_MAP_SYSTEM_MEMORY This should only be required on MIPS where CFG_SYS_SDRAM_BASE is still being used as virtual address. +config PCI_BRIDGE_MEM_ALIGNMENT + hex "Alignment boundary of PCI memory resource allocation" + default 0x10000 if TARGET_BOSTON + default 0x100000 + help + Specify a boundary for alignment of PCI memory resource allocation, + this is normally 0x100000 (1MB) but can be reduced to accommodate + hardware with tight bridge range if hardware allows. + config PCI_SRIOV bool "Enable Single Root I/O Virtualization support for PCI" help diff --git a/drivers/pci/pci_auto.c b/drivers/pci/pci_auto.c index 90f81886445..b2c76b25801 100644 --- a/drivers/pci/pci_auto.c +++ b/drivers/pci/pci_auto.c @@ -372,8 +372,8 @@ void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus) dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, 0xff); if (pci_mem) { - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_mem, 0x100000); + /* Round memory allocator */ + pciauto_region_align(pci_mem, CONFIG_PCI_BRIDGE_MEM_ALIGNMENT); /* * Set up memory and I/O filter limits, assume 32-bit @@ -387,8 +387,8 @@ void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus) } if (pci_prefetch) { - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_prefetch, 0x100000); + /* Round memory allocator */ + pciauto_region_align(pci_prefetch, CONFIG_PCI_BRIDGE_MEM_ALIGNMENT); /* * Set up memory and I/O filter limits, assume 32-bit @@ -465,8 +465,8 @@ void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus) dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, sub_bus - dev_seq(ctlr)); if (pci_mem) { - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_mem, 0x100000); + /* Round memory allocator */ + pciauto_region_align(pci_mem, CONFIG_PCI_BRIDGE_MEM_ALIGNMENT); dm_pci_write_config16(dev, PCI_MEMORY_LIMIT, ((pci_mem->bus_lower - 1) >> 16) & @@ -480,8 +480,8 @@ void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus) &prefechable_64); prefechable_64 &= PCI_PREF_RANGE_TYPE_MASK; - /* Round memory allocator to 1MB boundary */ - pciauto_region_align(pci_prefetch, 0x100000); + /* Round memory allocator */ + pciauto_region_align(pci_prefetch, CONFIG_PCI_BRIDGE_MEM_ALIGNMENT); dm_pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT, (((pci_prefetch->bus_lower - 1) >> 16) & |