From ece4e51291485bb4a71ff554964948b02ab89823 Mon Sep 17 00:00:00 2001 From: Sukadev Bhattiprolu Date: Tue, 7 Nov 2017 18:23:51 -0800 Subject: powerpc/vas: Export HVWC to debugfs Export the VAS Window context information to debugfs. We need to hold a mutex when closing the window to prevent a race with the debugfs read(). Rather than introduce a per-instance mutex, we use the global vas_mutex for now, since it is not heavily contended. The window->cop field is only relevant to a receive window so we were not setting it for a send window (which is is paired to a receive window anyway). But to simplify reporting in debugfs, set the 'cop' field for the send window also. Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Michael Ellerman --- arch/powerpc/platforms/powernv/vas.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/powerpc/platforms/powernv/vas.h') diff --git a/arch/powerpc/platforms/powernv/vas.h b/arch/powerpc/platforms/powernv/vas.h index 02d8a31d9051..756cbc5335bc 100644 --- a/arch/powerpc/platforms/powernv/vas.h +++ b/arch/powerpc/platforms/powernv/vas.h @@ -13,6 +13,8 @@ #include #include #include +#include +#include /* * Overview of Virtual Accelerator Switchboard (VAS). @@ -317,6 +319,9 @@ struct vas_instance { struct mutex mutex; struct vas_window *rxwin[VAS_COP_TYPE_MAX]; struct vas_window *windows[VAS_WINDOWS_PER_CHIP]; + + char *dbgname; + struct dentry *dbgdir; }; /* @@ -334,6 +339,9 @@ struct vas_window { pid_t pid; /* Linux process id of owner */ int wcreds_max; /* Window credits */ + char *dbgname; + struct dentry *dbgdir; + /* Fields applicable only to send windows */ void *paste_kaddr; char *paste_addr_name; @@ -394,7 +402,13 @@ struct vas_winctx { enum vas_notify_after_count notify_after_count; }; +extern struct mutex vas_mutex; + extern struct vas_instance *find_vas_instance(int vasid); +extern void vas_init_dbgdir(void); +extern void vas_instance_init_dbgdir(struct vas_instance *vinst); +extern void vas_window_init_dbgdir(struct vas_window *win); +extern void vas_window_free_dbgdir(struct vas_window *win); static inline void vas_log_write(struct vas_window *win, char *name, void *regptr, u64 val) -- cgit