Implement mapping for ROM files

* pci-arbiter/device_map.h:
* pci-arbiter/device_map.c:
  * New function: device_map_rom
    * Copies the whole rom in the arbiter space.
* pci-arbiter/pcifs.h:
  * struct pcifs_dirent:
    * New field to store the mapping address for each device rom.
o pci-arbiter/func_files.h:
* pci-arbiter/func_files.c:
  * read_rom_file:
    * Retrieves the rom contents from the local space instead of
      libpciaccess.
* pci-arbiter/netfs_impl.c:
  * netfs_attempt_read:get_filemap_region
    * Update call to read_rom_file.
  * get_filemap_region:
    * Uses the old code at netfs_get_filemap to get a proxy to
      the device memory region.
  * get_filemap_rom:
    * Returns a proxy to the locally mapped device rom.
  * netfs_get_filemap:
    * Checks the requested file to map and calls get_filemap_rom,
      get_filemap_region or returns en error.
Message-Id: <20220815161520.6059-2-jlledom@mailfence.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/pci-arbiter/pcifs.h b/pci-arbiter/pcifs.h
index 050c9e32..373dd4bd 100644
--- a/pci-arbiter/pcifs.h
+++ b/pci-arbiter/pcifs.h
@@ -98,6 +98,13 @@ struct pcifs_dirent
    * Only when a device is present
    */
   void *region_maps[6];
+
+  /*
+   * Address where the rom is mapped
+   *
+   * Only when a device is present
+   */
+  void *rom_map;
 };
 
 /*