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Subject[PATCH v2 05/18] powerpc/vas: Use helper to unpin/close window
Date
Use a helper to have the hardware unpin and mark a window closed.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
---
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
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