[PATCH v3 05/18] powerpc/vas: Use helper to unpin/close window
From: Sukadev Bhattiprolu <hidden>
Date: 2017-11-08 02:27:39
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Use a helper to have the hardware unpin and mark a window closed. Signed-off-by: Sukadev Bhattiprolu <redacted> --- arch/powerpc/platforms/powernv/vas-window.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c
index 8ab8a82..95622a9 100644
--- a/arch/powerpc/platforms/powernv/vas-window.c
+++ b/arch/powerpc/platforms/powernv/vas-window.c@@ -1101,6 +1101,20 @@ static void poll_window_castout(struct vas_window *window) } /* + * Unpin and close a window so no new requests are accepted and the + * hardware can evict this window from cache if necessary. + */ +static void unpin_close_window(struct vas_window *window) +{ + u64 val; + + val = read_hvwc_reg(window, VREG(WINCTL)); + val = SET_FIELD(VAS_WINCTL_PIN, val, 0); + val = SET_FIELD(VAS_WINCTL_OPEN, val, 0); + write_hvwc_reg(window, VREG(WINCTL), val); +} + +/* * Close a window. * * See Section 1.12.1 of VAS workbook v1.05 for details on closing window:
@@ -1114,8 +1128,6 @@ static void poll_window_castout(struct vas_window *window) */ int vas_win_close(struct vas_window *window) { - u64 val; - if (!window) return 0;
@@ -1131,11 +1143,7 @@ int vas_win_close(struct vas_window *window) poll_window_busy_state(window); - /* Unpin window from cache and close it */ - val = read_hvwc_reg(window, VREG(WINCTL)); - val = SET_FIELD(VAS_WINCTL_PIN, val, 0); - val = SET_FIELD(VAS_WINCTL_OPEN, val, 0); - write_hvwc_reg(window, VREG(WINCTL), val); + unpin_close_window(window); poll_window_castout(window);
--
2.7.4