diff options
| author | Christian König <christian.koenig@amd.com> | 2017-10-24 21:40:20 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-10-24 21:40:20 +0200 |
| commit | 276b738deb5bf856b9f6049fcd92a967f52643d7 (patch) | |
| tree | cac0ccc12391b30c519e116c696955da34fdb8cb /include | |
| parent | PCI: Add PCI resource type mask #define (diff) | |
| download | linux-276b738deb5bf856b9f6049fcd92a967f52643d7.tar.xz linux-276b738deb5bf856b9f6049fcd92a967f52643d7.zip | |
PCI: Add resizable BAR infrastructure
Add resizable BAR infrastructure, including defines and helper functions to
read the possible sizes of a BAR and update its size. See PCIe r3.1, sec
7.22.
Link: https://pcisig.com/sites/default/files/specification_documents/ECN_Resizable-BAR_24Apr2008.pdf
Signed-off-by: Christian König <christian.koenig@amd.com>
[bhelgaas: rename to functions with "rebar" (to match #defines), drop shift
#defines, drop "_MASK" suffixes, fix typos, fix kerneldoc]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/pci_regs.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index f8d58045926f..d34000a59f24 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -939,9 +939,13 @@ #define PCI_SATA_SIZEOF_LONG 16 /* Resizable BARs */ +#define PCI_REBAR_CAP 4 /* capability register */ +#define PCI_REBAR_CAP_SIZES 0x00FFFFF0 /* supported BAR sizes */ #define PCI_REBAR_CTRL 8 /* control register */ -#define PCI_REBAR_CTRL_NBAR_MASK (7 << 5) /* mask for # bars */ -#define PCI_REBAR_CTRL_NBAR_SHIFT 5 /* shift for # bars */ +#define PCI_REBAR_CTRL_BAR_IDX 0x00000007 /* BAR index */ +#define PCI_REBAR_CTRL_NBAR_MASK 0x000000E0 /* # of resizable BARs */ +#define PCI_REBAR_CTRL_NBAR_SHIFT 5 /* shift for # of BARs */ +#define PCI_REBAR_CTRL_BAR_SIZE 0x00001F00 /* BAR size */ /* Dynamic Power Allocation */ #define PCI_DPA_CAP 4 /* capability register */ |