architecture/riscv64/package/linux/0021-riscv-enable-generic-PCI-resource-mapping.patch

   1 From bdc2e9572166f05c1e7c250f2b862449cc34ed55 Mon Sep 17 00:00:00 2001
   2 From: Stanislaw Kardach <kda@semihalf.com>
   3 Date: Mon, 12 Apr 2021 13:10:12 +0200
   4 Subject: [PATCH 21/23] riscv: enable generic PCI resource mapping
   5
   6 Enable the PCI resource mapping on RISC-V using the generic framework.
   7 This allows userspace applications to mmap PCI resources using
   8 /sys/devices/pci*/*/resource* interface.
   9 The mmap has been tested with Intel x520-DA2 NIC card on a HiFive
  10 Unmatched board (SiFive FU740 SoC).
  11
  12 Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
  13 ---
  14  arch/riscv/include/asm/pci.h | 2 ++
  15  1 file changed, 2 insertions(+)
  16
  17 diff --git a/arch/riscv/include/asm/pci.h b/arch/riscv/include/asm/pci.h
  18 index 658e112..7fd52a3 100644
  19 --- a/arch/riscv/include/asm/pci.h
  20 +++ b/arch/riscv/include/asm/pci.h
  21 @@ -18,6 +18,8 @@
  22  /* RISC-V shim does not initialize PCI bus */
  23  #define pcibios_assign_all_busses() 1
  24
  25 +#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
  26 +
  27  extern int isa_dma_bridge_buggy;
  28
  29  #ifdef CONFIG_PCI
  30 --
  31 2.7.4
  32