linux-kernel - [PATCH 10/10] staging: fsl-mc: Added MSI support to the MC bus driver

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Date:	Mon, 26 Oct 2015 10:49:21 -0500
From:	"J. German Rivera" <German.Rivera@...escale.com>
To:	<gregkh@...uxfoundation.org>, <arnd@...db.de>,
	<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
CC:	<stuart.yoder@...escale.com>, <itai.katz@...escale.com>,
	<lijun.pan@...escale.com>, <leoli@...escale.com>,
	<scottwood@...escale.com>, <agraf@...e.de>,
	<bhamciu1@...escale.com>, <R89243@...escale.com>,
	<bhupesh.sharma@...escale.com>, <nir.erez@...escale.com>,
	<richard.schmitt@...escale.com>, <dan.carpenter@...cle.com>,
	<marc.zyngier@....com>, <jiang.liu@...ux.intel.com>,
	"J. German Rivera" <German.Rivera@...escale.com>
Subject: [PATCH 10/10] staging: fsl-mc: Added MSI support to the MC bus driver

Initialize/Cleanup ITS-MSI support for the MC bus driver at driver
init/exit time. Associate an MSI domain with each DPAA2 child device.

Signed-off-by: J. German Rivera <German.Rivera@...escale.com>
---
 drivers/staging/fsl-mc/bus/mc-bus.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/staging/fsl-mc/bus/mc-bus.c b/drivers/staging/fsl-mc/bus/mc-bus.c
index d34f1af..9317561 100644
--- a/drivers/staging/fsl-mc/bus/mc-bus.c
+++ b/drivers/staging/fsl-mc/bus/mc-bus.c
@@ -16,6 +16,8 @@
 #include <linux/ioport.h>
 #include <linux/slab.h>
 #include <linux/limits.h>
+#include <linux/bitops.h>
+#include <linux/msi.h>
 #include "../include/dpmng.h"
 #include "../include/mc-sys.h"
 #include "dprc-cmd.h"
@@ -472,6 +474,8 @@ int fsl_mc_device_add(struct dprc_obj_desc *obj_desc,
 		mc_dev->icid = parent_mc_dev->icid;
 		mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK;
 		mc_dev->dev.dma_mask = &mc_dev->dma_mask;
+		dev_set_msi_domain(&mc_dev->dev,
+				   dev_get_msi_domain(&parent_mc_dev->dev));
 	}
 
 	/*
@@ -833,8 +837,15 @@ static int __init fsl_mc_bus_driver_init(void)
 	if (error < 0)
 		goto error_cleanup_dprc_driver;
 
+	error = its_fsl_mc_msi_init();
+	if (error < 0)
+		goto error_cleanup_mc_allocator;
+
 	return 0;
 
+error_cleanup_mc_allocator:
+	fsl_mc_allocator_driver_exit();
+
 error_cleanup_dprc_driver:
 	dprc_driver_exit();
 
@@ -856,6 +867,7 @@ static void __exit fsl_mc_bus_driver_exit(void)
 	if (WARN_ON(!mc_dev_cache))
 		return;
 
+	its_fsl_mc_msi_cleanup();
 	fsl_mc_allocator_driver_exit();
 	dprc_driver_exit();
 	platform_driver_unregister(&fsl_mc_bus_driver);
-- 
2.3.3

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