diff options
| -rw-r--r-- | arch/powerpc/include/asm/vas.h | 7 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/vas-window.c | 10 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h index 044748f547f5..f98ade8a2603 100644 --- a/arch/powerpc/include/asm/vas.h +++ b/arch/powerpc/include/asm/vas.h @@ -10,6 +10,8 @@ #ifndef _ASM_POWERPC_VAS_H #define _ASM_POWERPC_VAS_H +struct vas_window; + /* * Min and max FIFO sizes are based on Version 1.05 Section 3.1.4.25 * (Local FIFO Size Register) of the VAS workbook. @@ -165,4 +167,9 @@ int vas_copy_crb(void *crb, int offset); */ int vas_paste_crb(struct vas_window *win, int offset, bool re); +/* + * Return the power bus paste address associated with @win so the caller + * can map that address into their address space. + */ +extern u64 vas_win_paste_addr(struct vas_window *win); #endif /* __ASM_POWERPC_VAS_H */ diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c index c030d4cf982e..d7d06533a1e9 100644 --- a/arch/powerpc/platforms/powernv/vas-window.c +++ b/arch/powerpc/platforms/powernv/vas-window.c @@ -40,6 +40,16 @@ static void compute_paste_address(struct vas_window *window, u64 *addr, int *len pr_debug("Txwin #%d: Paste addr 0x%llx\n", winid, *addr); } +u64 vas_win_paste_addr(struct vas_window *win) +{ + u64 addr; + + compute_paste_address(win, &addr, NULL); + + return addr; +} +EXPORT_SYMBOL(vas_win_paste_addr); + static inline void get_hvwc_mmio_bar(struct vas_window *window, u64 *start, int *len) { |