Changeset 832cbe7 in mainline for uspace/lib/device/include

Timestamp:

2025-02-05T12:30:20Z (11 months ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master

Children:

accdf882

Parents:

0dab4850

git-author:

Jiri Svoboda <jiri@…> (2025-02-04 21:30:06)

git-committer:

Jiri Svoboda <jiri@…> (2025-02-05 12:30:20)

Message:

Add proper IDE PCI to ISA fallback mechanism.

To determine if legacy IDE I/O ports are free, isa-ide asks isa,
who asks pciintel. pciintel waits for bus enumeration to complete,
then waits for all functions except the one who is asking
(which is ISA bus) to stabilize. During attach pci-ide will claim
the legacy IDE ports. Thus, if at this point legacy IDE ports
are unclaimed, pciintel tells ISA they are free, which tells isa-ide,
which continues to attach. If they are not free, isa-ide will not
attach.

This works for all use cases, including system without PCI bus,
system with PCI bus, but no (or disabled) PCI IDE, system with PCI
IDE with unrecognized VID/PID (which we will handle in legacy ISA mode).

Location:

uspace/lib/device/include

Files:

• devman.h (modified) (2 diffs)
• ipc/devman.h (modified) (2 diffs)

uspace/lib/device/include/devman.h

@@ -1 +1 @@
 /*
- * Copyright (c) 2009 Jiri Svoboda
+ * Copyright (c) 2025 Jiri Svoboda
  * Copyright (c) 2010 Lenka Trochtova
  * All rights reserved.
@@ -52 +52 @@
 extern errno_t devman_drv_fun_online(devman_handle_t);
 extern errno_t devman_drv_fun_offline(devman_handle_t);
+extern errno_t devman_drv_fun_wait_stable(devman_handle_t);
 
 extern async_sess_t *devman_device_connect(devman_handle_t, unsigned int);

uspace/lib/device/include/ipc/devman.h

@@ -1 +1 @@
 /*
+ * Copyright (c) 2025 Jiri Svoboda
  * Copyright (c) 2010 Lenka Trochtova
  * All rights reserved.
@@ -147 +148 @@
         DEVMAN_DRV_FUN_ONLINE,
         DEVMAN_DRV_FUN_OFFLINE,
+        DEVMAN_DRV_FUN_WAIT_STABLE,
         DEVMAN_REMOVE_FUNCTION
 } driver_to_devman_t;