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@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/fsl-mc/bus/mc-bus.c b/drivers/staging/fsl-mc/bus/mc-bus.c
index d34f1af3974603936bbbc74c5b51960e7e63fbd5..9317561973b1a3feea51c4a3e1b04f8c8edb9374 100644 (file)
--- 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);