@@ -206,11 +206,48 @@ int msi_setup_device_data(struct device *dev);
void msi_lock_descs(struct device *dev);
void msi_unlock_descs(struct device *dev);
-struct msi_desc *msi_first_desc(struct device *dev, enum msi_desc_filter filter);
-struct msi_desc *msi_next_desc(struct device *dev, enum msi_desc_filter filter);
+struct msi_desc *msi_domain_first_desc(struct device *dev, unsigned int domid,
+ enum msi_desc_filter filter);
/**
- * msi_for_each_desc - Iterate the MSI descriptors
+ * msi_first_desc - Get the first MSI descriptor of the default irqdomain
+ * @dev: Device to operate on
+ * @filter: Descriptor state filter
+ *
+ * Must be called with the MSI descriptor mutex held, i.e. msi_lock_descs()
+ * must be invoked before the call.
+ *
+ * Return: Pointer to the first MSI descriptor matching the search
+ * criteria, NULL if none found.
+ */
+static inline struct msi_desc *msi_first_desc(struct device *dev,
+ enum msi_desc_filter filter)
+{
+ return msi_domain_first_desc(dev, MSI_DEFAULT_DOMAIN, filter);
+}
+
+struct msi_desc *msi_next_desc(struct device *dev, unsigned int domid,
+ enum msi_desc_filter filter);
+
+/**
+ * msi_domain_for_each_desc - Iterate the MSI descriptors in a specific domain
+ *
+ * @desc: struct msi_desc pointer used as iterator
+ * @dev: struct device pointer - device to iterate
+ * @domid: The id of the interrupt domain which should be walked.
+ * @filter: Filter for descriptor selection
+ *
+ * Notes:
+ * - The loop must be protected with a msi_lock_descs()/msi_unlock_descs()
+ * pair.
+ * - It is safe to remove a retrieved MSI descriptor in the loop.
+ */
+#define msi_domain_for_each_desc(desc, dev, domid, filter) \
+ for ((desc) = msi_domain_first_desc((dev), (domid), (filter)); (desc); \
+ (desc) = msi_next_desc((dev), (domid), (filter)))
+
+/**
+ * msi_for_each_desc - Iterate the MSI descriptors in the default irqdomain
*
* @desc: struct msi_desc pointer used as iterator
* @dev: struct device pointer - device to iterate
@@ -221,9 +258,8 @@ struct msi_desc *msi_next_desc(struct device *dev, enum msi_desc_filter filter);
* pair.
* - It is safe to remove a retrieved MSI descriptor in the loop.
*/
-#define msi_for_each_desc(desc, dev, filter) \
- for ((desc) = msi_first_desc((dev), (filter)); (desc); \
- (desc) = msi_next_desc((dev), (filter)))
+#define msi_for_each_desc(desc, dev, filter) \
+ msi_domain_for_each_desc((desc), (dev), MSI_DEFAULT_DOMAIN, (filter))
#define msi_desc_to_dev(desc) ((desc)->dev)
@@ -19,8 +19,14 @@
#include "internals.h"
+/* Invalid Xarray index which is outside of any searchable range */
+#define MSI_XA_MAX_INDEX (ULONG_MAX - 1)
+/* The maximum domain size */
+#define MSI_XA_DOMAIN_SIZE (MSI_MAX_INDEX + 1)
+
static inline int msi_sysfs_create_group(struct device *dev);
+
/**
* msi_alloc_desc - Allocate an initialized msi_desc
* @dev: Pointer to the device for which this is allocated
@@ -252,27 +258,29 @@ EXPORT_SYMBOL_GPL(msi_lock_descs);
void msi_unlock_descs(struct device *dev)
{
/* Invalidate the index which was cached by the iterator */
- dev->msi.data->__iter_idx = MSI_MAX_INDEX;
+ dev->msi.data->__iter_idx = MSI_XA_MAX_INDEX;
mutex_unlock(&dev->msi.data->mutex);
}
EXPORT_SYMBOL_GPL(msi_unlock_descs);
-static struct msi_desc *msi_find_desc(struct msi_device_data *md, enum msi_desc_filter filter)
+static struct msi_desc *msi_find_desc(struct msi_device_data *md, unsigned int domid,
+ enum msi_desc_filter filter)
{
- struct xarray *xa = &md->__domains[MSI_DEFAULT_DOMAIN].store;
+ struct xarray *xa = &md->__domains[domid].store;
struct msi_desc *desc;
xa_for_each_start(xa, md->__iter_idx, desc, md->__iter_idx) {
if (msi_desc_match(desc, filter))
return desc;
}
- md->__iter_idx = MSI_MAX_INDEX;
+ md->__iter_idx = MSI_XA_MAX_INDEX;
return NULL;
}
/**
- * msi_first_desc - Get the first MSI descriptor of a device
+ * msi_domain_first_desc - Get the first MSI descriptor of an irqdomain associated to a device
* @dev: Device to operate on
+ * @domid: The id of the interrupt domain which should be walked.
* @filter: Descriptor state filter
*
* Must be called with the MSI descriptor mutex held, i.e. msi_lock_descs()
@@ -281,23 +289,25 @@ static struct msi_desc *msi_find_desc(struct msi_device_data *md, enum msi_desc_
* Return: Pointer to the first MSI descriptor matching the search
* criteria, NULL if none found.
*/
-struct msi_desc *msi_first_desc(struct device *dev, enum msi_desc_filter filter)
+struct msi_desc *msi_domain_first_desc(struct device *dev, unsigned int domid,
+ enum msi_desc_filter filter)
{
struct msi_device_data *md = dev->msi.data;
- if (WARN_ON_ONCE(!md))
+ if (WARN_ON_ONCE(!md || domid >= MSI_MAX_DEVICE_IRQDOMAINS))
return NULL;
lockdep_assert_held(&md->mutex);
md->__iter_idx = 0;
- return msi_find_desc(md, filter);
+ return msi_find_desc(md, domid, filter);
}
-EXPORT_SYMBOL_GPL(msi_first_desc);
+EXPORT_SYMBOL_GPL(msi_domain_first_desc);
/**
* msi_next_desc - Get the next MSI descriptor of a device
* @dev: Device to operate on
+ * @domid: The id of the interrupt domain which should be walked.
* @filter: Descriptor state filter
*
* The first invocation of msi_next_desc() has to be preceeded by a
@@ -308,11 +318,12 @@ EXPORT_SYMBOL_GPL(msi_first_desc);
* Return: Pointer to the next MSI descriptor matching the search
* criteria, NULL if none found.
*/
-struct msi_desc *msi_next_desc(struct device *dev, enum msi_desc_filter filter)
+struct msi_desc *msi_next_desc(struct device *dev, unsigned int domid,
+ enum msi_desc_filter filter)
{
struct msi_device_data *md = dev->msi.data;
- if (WARN_ON_ONCE(!md))
+ if (WARN_ON_ONCE(!md || domid >= MSI_MAX_DEVICE_IRQDOMAINS))
return NULL;
lockdep_assert_held(&md->mutex);
@@ -321,7 +332,7 @@ struct msi_desc *msi_next_desc(struct device *dev, enum msi_desc_filter filter)
return NULL;
md->__iter_idx++;
- return msi_find_desc(md, filter);
+ return msi_find_desc(md, domid, filter);
}
EXPORT_SYMBOL_GPL(msi_next_desc);