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, 23 insertions, 0 deletions

diff --git a/pci-arbiter/device_map.c b/pci-arbiter/device_map.c
index 1627746d..284d6e93 100644
--- a/pci-arbiter/device_map.c
+++ b/pci-arbiter/device_map.c
@@ -47,3 +47,26 @@ device_map_region (struct pci_device *device, struct pci_mem_region *region,
 
   return err;
 }
+
+error_t
+device_map_rom (struct pci_device *device, void **addr)
+{
+  error_t err = 0;
+  vm_address_t fullrom;
+
+  if (*addr == 0)
+    {
+      err = vm_allocate (mach_task_self (), &fullrom, device->rom_size, 1);
+      if (err)
+	return ENOMEM;
+
+      err = pci_device_read_rom (device, (void *) fullrom);
+      if (err)
+	return err;
+
+      /* Return */
+      *addr = (void *) fullrom;
+    }
+
+  return err;
+}