THE MSI domain associated with a root DPRC object is
obtained form the device tree. Child DPRCs inherit
the parent DPRC MSI domain.
Signed-off-by: J. German Rivera <german.riv...@freescale.com>
---
CHANGE HISTORY
Changes in v3: none
Changes in v2: none
drivers/staging/fsl-mc/bus/dprc-driver.c | 39 ++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/drivers/staging/fsl-mc/bus/dprc-driver.c
b/drivers/staging/fsl-mc/bus/dprc-driver.c
index 3bcd161..455379d 100644
--- a/drivers/staging/fsl-mc/bus/dprc-driver.c
+++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
@@ -13,6 +13,7 @@
#include "../include/mc-sys.h"
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/interrupt.h>
#include "dprc-cmd.h"
struct dprc_child_objs {
@@ -398,11 +399,16 @@ static int dprc_probe(struct fsl_mc_device *mc_dev)
{
int error;
size_t region_size;
+ struct device *parent_dev = mc_dev->dev.parent;
struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+ bool msi_domain_set = false;
if (WARN_ON(strcmp(mc_dev->obj_desc.type, "dprc") != 0))
return -EINVAL;
+ if (WARN_ON(dev_get_msi_domain(&mc_dev->dev)))
+ return -EINVAL;
+
if (!mc_dev->mc_io) {
/*
* This is a child DPRC:
@@ -421,6 +427,30 @@ static int dprc_probe(struct fsl_mc_device *mc_dev)
&mc_dev->mc_io);
if (error < 0)
return error;
+ /*
+ * Inherit parent MSI domain:
+ */
+ dev_set_msi_domain(&mc_dev->dev,
+ dev_get_msi_domain(parent_dev));
+ msi_domain_set = true;
+ } else {
+ /*
+ * This is a root DPRC
+ */
+ struct irq_domain *mc_msi_domain;
+
+ if (WARN_ON(parent_dev->bus == &fsl_mc_bus_type))
+ return -EINVAL;
+
+ error = fsl_mc_find_msi_domain(parent_dev->of_node,
+ &mc_msi_domain);
+ if (error < 0) {
+ dev_warn(&mc_dev->dev,
+ "WARNING: MC bus without interrupt support\n");
+ } else {
+ dev_set_msi_domain(&mc_dev->dev, mc_msi_domain);
+ msi_domain_set = true;
+ }
}
error = dprc_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
@@ -446,6 +476,9 @@ error_cleanup_open:
(void)dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
error_cleanup_mc_io:
+ if (msi_domain_set)
+ dev_set_msi_domain(&mc_dev->dev, NULL);
+
fsl_destroy_mc_io(mc_dev->mc_io);
return error;
}
@@ -463,6 +496,7 @@ error_cleanup_mc_io:
static int dprc_remove(struct fsl_mc_device *mc_dev)
{
int error;
+ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
if (WARN_ON(strcmp(mc_dev->obj_desc.type, "dprc") != 0))
return -EINVAL;
@@ -475,6 +509,11 @@ static int dprc_remove(struct fsl_mc_device *mc_dev)
if (error < 0)
dev_err(&mc_dev->dev, "dprc_close() failed: %d\n", error);
+ if (dev_get_msi_domain(&mc_dev->dev)) {
+ fsl_mc_cleanup_irq_pool(mc_bus);
+ dev_set_msi_domain(&mc_dev->dev, NULL);
+ }
+
dev_info(&mc_dev->dev, "DPRC device unbound from driver");
return 0;
}
--
2.3.3
--
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