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powerpc/vas: Use helper to unpin/close window 

Use a helper to have the hardware unpin and mark a window closed.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Sukadev Bhattiprolu 2017-11-07 18:23:45 -08:00 committed by Michael Ellerman
parent 4963ac3632
commit 36a288fe9d
1 changed files with 15 additions and 7 deletions
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22
arch/powerpc/platforms/powernv/vas-window.c
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@ -1100,6 +1100,20 @@ static void poll_window_castout(struct vas_window *window)
/* stub for now */
}
/*
* 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.
*
@ -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);