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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2020-06-19 11:20:07 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2020-07-28 17:51:31 +0300
commit746a71d02b5d15817fcb13c956ba999a87773952 (patch)
tree0a0da26a91d93df26c4451865323102214c2feb2 /drivers/of
parentb8e069a2a8da02137605ba585837a3a0c45df01a (diff)
downloadlinux-746a71d02b5d15817fcb13c956ba999a87773952.tar.xz
of/iommu: Make of_map_rid() PCI agnostic
There is nothing PCI specific (other than the RID - requester ID) in the of_map_rid() implementation, so the same function can be reused for input/output IDs mapping for other busses just as well. Rename the RID instances/names to a generic "id" tag. No functionality change intended. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Joerg Roedel <jroedel@suse.de> Cc: Rob Herring <robh+dt@kernel.org> Cc: Joerg Roedel <joro@8bytes.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200619082013.13661-7-lorenzo.pieralisi@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c42
-rw-r--r--drivers/of/irq.c2
2 files changed, 22 insertions, 22 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index ae03b1218b06..ea44fea99813 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2201,15 +2201,15 @@ int of_find_last_cache_level(unsigned int cpu)
}
/**
- * of_map_rid - Translate a requester ID through a downstream mapping.
+ * of_map_id - Translate an ID through a downstream mapping.
* @np: root complex device node.
- * @rid: device requester ID to map.
+ * @id: device ID to map.
* @map_name: property name of the map to use.
* @map_mask_name: optional property name of the mask to use.
* @target: optional pointer to a target device node.
* @id_out: optional pointer to receive the translated ID.
*
- * Given a device requester ID, look up the appropriate implementation-defined
+ * Given a device ID, look up the appropriate implementation-defined
* platform ID and/or the target device which receives transactions on that
* ID, as per the "iommu-map" and "msi-map" bindings. Either of @target or
* @id_out may be NULL if only the other is required. If @target points to
@@ -2219,11 +2219,11 @@ int of_find_last_cache_level(unsigned int cpu)
*
* Return: 0 on success or a standard error code on failure.
*/
-int of_map_rid(struct device_node *np, u32 rid,
+int of_map_id(struct device_node *np, u32 id,
const char *map_name, const char *map_mask_name,
struct device_node **target, u32 *id_out)
{
- u32 map_mask, masked_rid;
+ u32 map_mask, masked_id;
int map_len;
const __be32 *map = NULL;
@@ -2235,7 +2235,7 @@ int of_map_rid(struct device_node *np, u32 rid,
if (target)
return -ENODEV;
/* Otherwise, no map implies no translation */
- *id_out = rid;
+ *id_out = id;
return 0;
}
@@ -2255,22 +2255,22 @@ int of_map_rid(struct device_node *np, u32 rid,
if (map_mask_name)
of_property_read_u32(np, map_mask_name, &map_mask);
- masked_rid = map_mask & rid;
+ masked_id = map_mask & id;
for ( ; map_len > 0; map_len -= 4 * sizeof(*map), map += 4) {
struct device_node *phandle_node;
- u32 rid_base = be32_to_cpup(map + 0);
+ u32 id_base = be32_to_cpup(map + 0);
u32 phandle = be32_to_cpup(map + 1);
u32 out_base = be32_to_cpup(map + 2);
- u32 rid_len = be32_to_cpup(map + 3);
+ u32 id_len = be32_to_cpup(map + 3);
- if (rid_base & ~map_mask) {
- pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores rid-base (0x%x)\n",
+ if (id_base & ~map_mask) {
+ pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores id-base (0x%x)\n",
np, map_name, map_name,
- map_mask, rid_base);
+ map_mask, id_base);
return -EFAULT;
}
- if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
+ if (masked_id < id_base || masked_id >= id_base + id_len)
continue;
phandle_node = of_find_node_by_phandle(phandle);
@@ -2288,20 +2288,20 @@ int of_map_rid(struct device_node *np, u32 rid,
}
if (id_out)
- *id_out = masked_rid - rid_base + out_base;
+ *id_out = masked_id - id_base + out_base;
- pr_debug("%pOF: %s, using mask %08x, rid-base: %08x, out-base: %08x, length: %08x, rid: %08x -> %08x\n",
- np, map_name, map_mask, rid_base, out_base,
- rid_len, rid, masked_rid - rid_base + out_base);
+ pr_debug("%pOF: %s, using mask %08x, id-base: %08x, out-base: %08x, length: %08x, id: %08x -> %08x\n",
+ np, map_name, map_mask, id_base, out_base,
+ id_len, id, masked_id - id_base + out_base);
return 0;
}
- pr_info("%pOF: no %s translation for rid 0x%x on %pOF\n", np, map_name,
- rid, target && *target ? *target : NULL);
+ pr_info("%pOF: no %s translation for id 0x%x on %pOF\n", np, map_name,
+ id, target && *target ? *target : NULL);
/* Bypasses translation */
if (id_out)
- *id_out = rid;
+ *id_out = id;
return 0;
}
-EXPORT_SYMBOL_GPL(of_map_rid);
+EXPORT_SYMBOL_GPL(of_map_id);
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index a296eaf52a5b..d632bc5b3a2d 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -587,7 +587,7 @@ static u32 __of_msi_map_rid(struct device *dev, struct device_node **np,
* "msi-map" property.
*/
for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent)
- if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map",
+ if (!of_map_id(parent_dev->of_node, rid_in, "msi-map",
"msi-map-mask", np, &rid_out))
break;
return rid_out;