From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>, mikey@neuling.org,
        stewart@linux.vnet.ibm.com, apopple@au1.ibm.com, hbabu@us.ibm.com,
        oohall@gmail.com, linuxppc-dev@ozlabs.org,
        <linux-kernel@vger.kernel.org>
Subject: [PATCH v6 10/17] powerpc/vas: Define vas_rx_win_open() interface
Date: Tue,  8 Aug 2017 16:06:55 -0700
In-Reply-To: <1502233622-9330-1-git-send-email-sukadev@linux.vnet.ibm.com>
References: <1502233622-9330-1-git-send-email-sukadev@linux.vnet.ibm.com>
Message-Id: <1502233622-9330-11-git-send-email-sukadev@linux.vnet.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1537
Lines: 45

Define the vas_rx_win_open() interface. This interface is intended to be
used by the Nest Accelerator (NX) driver(s) to setup receive windows for
one or more NX engines (which implement compression/encryption algorithms
in the hardware).

Follow-on patches will provide an interface to close the window and to open
a send window that kenrel subsystems can use to access the NX engines.

The interface to open a receive window is expected to be invoked for each
instance of VAS in the system.

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

Changelog[v6]:
	- Add support for FTW windows

Changelog[v4]:
	- Export the symbols

Changelog[v3]:
	- Fault receive windows must enable interrupts and disable
	  notifications. NX Windows are opposite.
	- Use macros rather than enum for threshold-control mode
	- Ignore irq_ports for in-kernel windows. They are needed for
	  user space windows and will be added later
---
 arch/powerpc/platforms/powernv/vas-window.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c
index ff64022..dfa7e67 100644
--- a/arch/powerpc/platforms/powernv/vas-window.c
+++ b/arch/powerpc/platforms/powernv/vas-window.c
@@ -717,7 +717,7 @@ void clear_vinst_win(struct vas_window *window)
 
 	mutex_lock(&vinst->mutex);
 
-	if (!window->tx_win) {
+	if (!window->user_win && !window->tx_win) {
 		WARN_ON_ONCE(!vinst->rxwin[window->cop]);
 		vinst->rxwin[window->cop] = NULL;
 	}
-- 
2.7.4