* [PATCH 1/6 v2] Docs: dt: add fsl-mc iommu-map device-tree binding
2018-04-17 10:21 ` [PATCH 0/6 v2] Support for fsl-mc bus and its devices in SMMU Nipun Gupta
@ 2018-04-17 10:21 ` Nipun Gupta
2018-04-17 10:21 ` [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for other devices too Nipun Gupta
` (4 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Nipun Gupta @ 2018-04-17 10:21 UTC (permalink / raw)
To: robin.murphy, will.deacon, mark.rutland, catalin.marinas
Cc: devicetree, bharat.bhushan, stuyoder, frowand.list, gregkh, joro,
linuxppc-dev, linux-kernel, leoyang.li, iommu, robh+dt,
Nipun Gupta, linux-pci, bhelgaas, laurentiu.tudor, shawnguo, hch,
linux-arm-kernel, m.szyprowski
The existing IOMMU bindings cannot be used to specify the relationship
between fsl-mc devices and IOMMUs. This patch adds a generic binding for
mapping fsl-mc devices to IOMMUs, using iommu-map property.
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
.../devicetree/bindings/misc/fsl,qoriq-mc.txt | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
index 6611a7c..8cbed4f 100644
--- a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
+++ b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
@@ -9,6 +9,25 @@ blocks that can be used to create functional hardware objects/devices
such as network interfaces, crypto accelerator instances, L2 switches,
etc.
+For an overview of the DPAA2 architecture and fsl-mc bus see:
+drivers/staging/fsl-mc/README.txt
+
+As described in the above overview, all DPAA2 objects in a DPRC share the
+same hardware "isolation context" and a 10-bit value called an ICID
+(isolation context id) is expressed by the hardware to identify
+the requester.
+
+The generic 'iommus' property is insufficient to describe the relationship
+between ICIDs and IOMMUs, so an iommu-map property is used to define
+the set of possible ICIDs under a root DPRC and how they map to
+an IOMMU.
+
+For generic IOMMU bindings, see
+Documentation/devicetree/bindings/iommu/iommu.txt.
+
+For arm-smmu binding, see:
+Documentation/devicetree/bindings/iommu/arm,smmu.txt.
+
Required properties:
- compatible
@@ -88,14 +107,34 @@ Sub-nodes:
Value type: <phandle>
Definition: Specifies the phandle to the PHY device node associated
with the this dpmac.
+Optional properties:
+
+- iommu-map: Maps an ICID to an IOMMU and associated iommu-specifier
+ data.
+
+ The property is an arbitrary number of tuples of
+ (icid-base,iommu,iommu-base,length).
+
+ Any ICID i in the interval [icid-base, icid-base + length) is
+ associated with the listed IOMMU, with the iommu-specifier
+ (i - icid-base + iommu-base).
Example:
+ smmu: iommu@5000000 {
+ compatible = "arm,mmu-500";
+ #iommu-cells = <2>;
+ stream-match-mask = <0x7C00>;
+ ...
+ };
+
fsl_mc: fsl-mc@80c000000 {
compatible = "fsl,qoriq-mc";
reg = <0x00000008 0x0c000000 0 0x40>, /* MC portal base */
<0x00000000 0x08340000 0 0x40000>; /* MC control reg */
msi-parent = <&its>;
+ /* define map for ICIDs 23-64 */
+ iommu-map = <23 &smmu 23 41>;
#address-cells = <3>;
#size-cells = <1>;
--
1.9.1
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^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for other devices too
2018-04-17 10:21 ` [PATCH 0/6 v2] Support for fsl-mc bus and its devices in SMMU Nipun Gupta
2018-04-17 10:21 ` [PATCH 1/6 v2] Docs: dt: add fsl-mc iommu-map device-tree binding Nipun Gupta
@ 2018-04-17 10:21 ` Nipun Gupta
2018-04-17 16:52 ` Robin Murphy
2018-04-17 10:21 ` [PATCH 3/6 v2] iommu: support iommu configuration for fsl-mc devices Nipun Gupta
` (3 subsequent siblings)
5 siblings, 1 reply; 11+ messages in thread
From: Nipun Gupta @ 2018-04-17 10:21 UTC (permalink / raw)
To: robin.murphy, will.deacon, mark.rutland, catalin.marinas
Cc: devicetree, bharat.bhushan, stuyoder, frowand.list, gregkh, joro,
linuxppc-dev, linux-kernel, leoyang.li, iommu, robh+dt,
Nipun Gupta, linux-pci, bhelgaas, laurentiu.tudor, shawnguo, hch,
linux-arm-kernel, m.szyprowski
iommu-map property is also used by devices with fsl-mc. This
patch moves the of_pci_map_rid to generic location, so that it
can be used by other busses too.
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
drivers/iommu/of_iommu.c | 106 +++++++++++++++++++++++++++++++++++++++++++++--
drivers/of/irq.c | 6 +--
drivers/pci/of.c | 101 --------------------------------------------
include/linux/of_iommu.h | 11 +++++
include/linux/of_pci.h | 10 -----
5 files changed, 117 insertions(+), 117 deletions(-)
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 5c36a8b..4e7712f 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -138,6 +138,106 @@ static int of_iommu_xlate(struct device *dev,
return ops->of_xlate(dev, iommu_spec);
}
+/**
+ * of_map_rid - Translate a requester ID through a downstream mapping.
+ * @np: root complex device node.
+ * @rid: device requester 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
+ * 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
+ * a non-NULL device node pointer, only entries targeting that node will be
+ * matched; if it points to a NULL value, it will receive the device node of
+ * the first matching target phandle, with a reference held.
+ *
+ * Return: 0 on success or a standard error code on failure.
+ */
+int of_map_rid(struct device_node *np, u32 rid,
+ const char *map_name, const char *map_mask_name,
+ struct device_node **target, u32 *id_out)
+{
+ u32 map_mask, masked_rid;
+ int map_len;
+ const __be32 *map = NULL;
+
+ if (!np || !map_name || (!target && !id_out))
+ return -EINVAL;
+
+ map = of_get_property(np, map_name, &map_len);
+ if (!map) {
+ if (target)
+ return -ENODEV;
+ /* Otherwise, no map implies no translation */
+ *id_out = rid;
+ return 0;
+ }
+
+ if (!map_len || map_len % (4 * sizeof(*map))) {
+ pr_err("%pOF: Error: Bad %s length: %d\n", np,
+ map_name, map_len);
+ return -EINVAL;
+ }
+
+ /* The default is to select all bits. */
+ map_mask = 0xffffffff;
+
+ /*
+ * Can be overridden by "{iommu,msi}-map-mask" property.
+ */
+ if (map_mask_name)
+ of_property_read_u32(np, map_mask_name, &map_mask);
+
+ masked_rid = map_mask & rid;
+ 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 phandle = be32_to_cpup(map + 1);
+ u32 out_base = be32_to_cpup(map + 2);
+ u32 rid_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",
+ np, map_name, map_name,
+ map_mask, rid_base);
+ return -EFAULT;
+ }
+
+ if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
+ continue;
+
+ phandle_node = of_find_node_by_phandle(phandle);
+ if (!phandle_node)
+ return -ENODEV;
+
+ if (target) {
+ if (*target)
+ of_node_put(phandle_node);
+ else
+ *target = phandle_node;
+
+ if (*target != phandle_node)
+ continue;
+ }
+
+ if (id_out)
+ *id_out = masked_rid - rid_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);
+ return 0;
+ }
+
+ pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on %pOF\n",
+ np, map_name, rid, target && *target ? *target : NULL);
+ return -EFAULT;
+}
+
struct of_pci_iommu_alias_info {
struct device *dev;
struct device_node *np;
@@ -149,9 +249,9 @@ static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
struct of_phandle_args iommu_spec = { .args_count = 1 };
int err;
- err = of_pci_map_rid(info->np, alias, "iommu-map",
- "iommu-map-mask", &iommu_spec.np,
- iommu_spec.args);
+ err = of_map_rid(info->np, alias, "iommu-map",
+ "iommu-map-mask", &iommu_spec.np,
+ iommu_spec.args);
if (err)
return err == -ENODEV ? NO_IOMMU : err;
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 02ad93a..b72eeec 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -22,7 +22,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
-#include <linux/of_pci.h>
+#include <linux/of_iommu.h>
#include <linux/string.h>
#include <linux/slab.h>
@@ -588,8 +588,8 @@ 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_pci_map_rid(parent_dev->of_node, rid_in, "msi-map",
- "msi-map-mask", np, &rid_out))
+ if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map",
+ "msi-map-mask", np, &rid_out))
break;
return rid_out;
}
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index a28355c..d2cebbe 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -362,107 +362,6 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources);
#endif /* CONFIG_OF_ADDRESS */
-/**
- * of_pci_map_rid - Translate a requester ID through a downstream mapping.
- * @np: root complex device node.
- * @rid: PCI requester 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 PCI requester 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
- * a non-NULL device node pointer, only entries targeting that node will be
- * matched; if it points to a NULL value, it will receive the device node of
- * the first matching target phandle, with a reference held.
- *
- * Return: 0 on success or a standard error code on failure.
- */
-int of_pci_map_rid(struct device_node *np, u32 rid,
- const char *map_name, const char *map_mask_name,
- struct device_node **target, u32 *id_out)
-{
- u32 map_mask, masked_rid;
- int map_len;
- const __be32 *map = NULL;
-
- if (!np || !map_name || (!target && !id_out))
- return -EINVAL;
-
- map = of_get_property(np, map_name, &map_len);
- if (!map) {
- if (target)
- return -ENODEV;
- /* Otherwise, no map implies no translation */
- *id_out = rid;
- return 0;
- }
-
- if (!map_len || map_len % (4 * sizeof(*map))) {
- pr_err("%pOF: Error: Bad %s length: %d\n", np,
- map_name, map_len);
- return -EINVAL;
- }
-
- /* The default is to select all bits. */
- map_mask = 0xffffffff;
-
- /*
- * Can be overridden by "{iommu,msi}-map-mask" property.
- * If of_property_read_u32() fails, the default is used.
- */
- if (map_mask_name)
- of_property_read_u32(np, map_mask_name, &map_mask);
-
- masked_rid = map_mask & rid;
- 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 phandle = be32_to_cpup(map + 1);
- u32 out_base = be32_to_cpup(map + 2);
- u32 rid_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",
- np, map_name, map_name,
- map_mask, rid_base);
- return -EFAULT;
- }
-
- if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
- continue;
-
- phandle_node = of_find_node_by_phandle(phandle);
- if (!phandle_node)
- return -ENODEV;
-
- if (target) {
- if (*target)
- of_node_put(phandle_node);
- else
- *target = phandle_node;
-
- if (*target != phandle_node)
- continue;
- }
-
- if (id_out)
- *id_out = masked_rid - rid_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);
- return 0;
- }
-
- pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on %pOF\n",
- np, map_name, rid, target && *target ? *target : NULL);
- return -EFAULT;
-}
-
#if IS_ENABLED(CONFIG_OF_IRQ)
/**
* of_irq_parse_pci - Resolve the interrupt for a PCI device
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index 4fa654e..432b53c 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -15,6 +15,10 @@ extern int of_get_dma_window(struct device_node *dn, const char *prefix,
extern const struct iommu_ops *of_iommu_configure(struct device *dev,
struct device_node *master_np);
+int of_map_rid(struct device_node *np, u32 rid,
+ const char *map_name, const char *map_mask_name,
+ struct device_node **target, u32 *id_out);
+
#else
static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
@@ -30,6 +34,13 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
return NULL;
}
+static inline int of_map_rid(struct device_node *np, u32 rid,
+ const char *map_name, const char *map_mask_name,
+ struct device_node **target, u32 *id_out)
+{
+ return -EINVAL;
+}
+
#endif /* CONFIG_OF_IOMMU */
extern struct of_device_id __iommu_of_table;
diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
index 091033a..a23b44a 100644
--- a/include/linux/of_pci.h
+++ b/include/linux/of_pci.h
@@ -17,9 +17,6 @@ struct device_node *of_pci_find_child_device(struct device_node *parent,
int of_get_pci_domain_nr(struct device_node *node);
int of_pci_get_max_link_speed(struct device_node *node);
void of_pci_check_probe_only(void);
-int of_pci_map_rid(struct device_node *np, u32 rid,
- const char *map_name, const char *map_mask_name,
- struct device_node **target, u32 *id_out);
#else
static inline struct device_node *of_pci_find_child_device(struct device_node *parent,
unsigned int devfn)
@@ -44,13 +41,6 @@ static inline int of_pci_get_devfn(struct device_node *np)
return -1;
}
-static inline int of_pci_map_rid(struct device_node *np, u32 rid,
- const char *map_name, const char *map_mask_name,
- struct device_node **target, u32 *id_out)
-{
- return -EINVAL;
-}
-
static inline int
of_pci_get_max_link_speed(struct device_node *node)
{
--
1.9.1
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 11+ messages in thread* Re: [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for other devices too
2018-04-17 10:21 ` [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for other devices too Nipun Gupta
@ 2018-04-17 16:52 ` Robin Murphy
2018-04-18 5:09 ` Bharat Bhushan
2018-04-18 6:21 ` Nipun Gupta
0 siblings, 2 replies; 11+ messages in thread
From: Robin Murphy @ 2018-04-17 16:52 UTC (permalink / raw)
To: Nipun Gupta, robh+dt, frowand.list
Cc: will.deacon, mark.rutland, catalin.marinas, hch, gregkh, joro,
m.szyprowski, shawnguo, bhelgaas, iommu, linux-kernel, devicetree,
linux-arm-kernel, linuxppc-dev, linux-pci, bharat.bhushan,
stuyoder, laurentiu.tudor, leoyang.li
On 17/04/18 11:21, Nipun Gupta wrote:
> iommu-map property is also used by devices with fsl-mc. This
> patch moves the of_pci_map_rid to generic location, so that it
> can be used by other busses too.
>
> Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
> ---
> drivers/iommu/of_iommu.c | 106 +++++++++++++++++++++++++++++++++++++++++++++--
Doesn't this break "msi-parent" parsing for !CONFIG_OF_IOMMU? I guess
you don't want fsl-mc to have to depend on PCI, but this looks like a
step in the wrong direction.
I'm not entirely sure where of_map_rid() fits best, but from a quick
look around the least-worst option might be drivers/of/of_address.c,
unless Rob and Frank have a better idea of where generic DT-based ID
translation routines could live?
> drivers/of/irq.c | 6 +--
> drivers/pci/of.c | 101 --------------------------------------------
> include/linux/of_iommu.h | 11 +++++
> include/linux/of_pci.h | 10 -----
> 5 files changed, 117 insertions(+), 117 deletions(-)
>
> diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
> index 5c36a8b..4e7712f 100644
> --- a/drivers/iommu/of_iommu.c
> +++ b/drivers/iommu/of_iommu.c
> @@ -138,6 +138,106 @@ static int of_iommu_xlate(struct device *dev,
> return ops->of_xlate(dev, iommu_spec);
> }
>
> +/**
> + * of_map_rid - Translate a requester ID through a downstream mapping.
> + * @np: root complex device node.
> + * @rid: device requester 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
> + * 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
> + * a non-NULL device node pointer, only entries targeting that node will be
> + * matched; if it points to a NULL value, it will receive the device node of
> + * the first matching target phandle, with a reference held.
> + *
> + * Return: 0 on success or a standard error code on failure.
> + */
> +int of_map_rid(struct device_node *np, u32 rid,
> + const char *map_name, const char *map_mask_name,
> + struct device_node **target, u32 *id_out)
> +{
> + u32 map_mask, masked_rid;
> + int map_len;
> + const __be32 *map = NULL;
> +
> + if (!np || !map_name || (!target && !id_out))
> + return -EINVAL;
> +
> + map = of_get_property(np, map_name, &map_len);
> + if (!map) {
> + if (target)
> + return -ENODEV;
> + /* Otherwise, no map implies no translation */
> + *id_out = rid;
> + return 0;
> + }
> +
> + if (!map_len || map_len % (4 * sizeof(*map))) {
> + pr_err("%pOF: Error: Bad %s length: %d\n", np,
> + map_name, map_len);
> + return -EINVAL;
> + }
> +
> + /* The default is to select all bits. */
> + map_mask = 0xffffffff;
> +
> + /*
> + * Can be overridden by "{iommu,msi}-map-mask" property.
> + */
> + if (map_mask_name)
> + of_property_read_u32(np, map_mask_name, &map_mask);
> +
> + masked_rid = map_mask & rid;
> + 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 phandle = be32_to_cpup(map + 1);
> + u32 out_base = be32_to_cpup(map + 2);
> + u32 rid_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",
> + np, map_name, map_name,
> + map_mask, rid_base);
> + return -EFAULT;
> + }
> +
> + if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
> + continue;
> +
> + phandle_node = of_find_node_by_phandle(phandle);
> + if (!phandle_node)
> + return -ENODEV;
> +
> + if (target) {
> + if (*target)
> + of_node_put(phandle_node);
> + else
> + *target = phandle_node;
> +
> + if (*target != phandle_node)
> + continue;
> + }
> +
> + if (id_out)
> + *id_out = masked_rid - rid_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);
> + return 0;
> + }
> +
> + pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on %pOF\n",
> + np, map_name, rid, target && *target ? *target : NULL);
> + return -EFAULT;
> +}
> +
> struct of_pci_iommu_alias_info {
> struct device *dev;
> struct device_node *np;
> @@ -149,9 +249,9 @@ static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
> struct of_phandle_args iommu_spec = { .args_count = 1 };
> int err;
>
> - err = of_pci_map_rid(info->np, alias, "iommu-map",
> - "iommu-map-mask", &iommu_spec.np,
> - iommu_spec.args);
> + err = of_map_rid(info->np, alias, "iommu-map",
> + "iommu-map-mask", &iommu_spec.np,
> + iommu_spec.args);
Super-nit: Apparently I missed rewrapping this to 2 lines in
d87beb749281, but if it's being touched again, that would be nice ;)
Robin.
> if (err)
> return err == -ENODEV ? NO_IOMMU : err;
>
> diff --git a/drivers/of/irq.c b/drivers/of/irq.c
> index 02ad93a..b72eeec 100644
> --- a/drivers/of/irq.c
> +++ b/drivers/of/irq.c
> @@ -22,7 +22,7 @@
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/of_irq.h>
> -#include <linux/of_pci.h>
> +#include <linux/of_iommu.h>
> #include <linux/string.h>
> #include <linux/slab.h>
>
> @@ -588,8 +588,8 @@ 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_pci_map_rid(parent_dev->of_node, rid_in, "msi-map",
> - "msi-map-mask", np, &rid_out))
> + if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map",
> + "msi-map-mask", np, &rid_out))
> break;
> return rid_out;
> }
> diff --git a/drivers/pci/of.c b/drivers/pci/of.c
> index a28355c..d2cebbe 100644
> --- a/drivers/pci/of.c
> +++ b/drivers/pci/of.c
> @@ -362,107 +362,6 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
> EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources);
> #endif /* CONFIG_OF_ADDRESS */
>
> -/**
> - * of_pci_map_rid - Translate a requester ID through a downstream mapping.
> - * @np: root complex device node.
> - * @rid: PCI requester 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 PCI requester 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
> - * a non-NULL device node pointer, only entries targeting that node will be
> - * matched; if it points to a NULL value, it will receive the device node of
> - * the first matching target phandle, with a reference held.
> - *
> - * Return: 0 on success or a standard error code on failure.
> - */
> -int of_pci_map_rid(struct device_node *np, u32 rid,
> - const char *map_name, const char *map_mask_name,
> - struct device_node **target, u32 *id_out)
> -{
> - u32 map_mask, masked_rid;
> - int map_len;
> - const __be32 *map = NULL;
> -
> - if (!np || !map_name || (!target && !id_out))
> - return -EINVAL;
> -
> - map = of_get_property(np, map_name, &map_len);
> - if (!map) {
> - if (target)
> - return -ENODEV;
> - /* Otherwise, no map implies no translation */
> - *id_out = rid;
> - return 0;
> - }
> -
> - if (!map_len || map_len % (4 * sizeof(*map))) {
> - pr_err("%pOF: Error: Bad %s length: %d\n", np,
> - map_name, map_len);
> - return -EINVAL;
> - }
> -
> - /* The default is to select all bits. */
> - map_mask = 0xffffffff;
> -
> - /*
> - * Can be overridden by "{iommu,msi}-map-mask" property.
> - * If of_property_read_u32() fails, the default is used.
> - */
> - if (map_mask_name)
> - of_property_read_u32(np, map_mask_name, &map_mask);
> -
> - masked_rid = map_mask & rid;
> - 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 phandle = be32_to_cpup(map + 1);
> - u32 out_base = be32_to_cpup(map + 2);
> - u32 rid_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",
> - np, map_name, map_name,
> - map_mask, rid_base);
> - return -EFAULT;
> - }
> -
> - if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
> - continue;
> -
> - phandle_node = of_find_node_by_phandle(phandle);
> - if (!phandle_node)
> - return -ENODEV;
> -
> - if (target) {
> - if (*target)
> - of_node_put(phandle_node);
> - else
> - *target = phandle_node;
> -
> - if (*target != phandle_node)
> - continue;
> - }
> -
> - if (id_out)
> - *id_out = masked_rid - rid_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);
> - return 0;
> - }
> -
> - pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on %pOF\n",
> - np, map_name, rid, target && *target ? *target : NULL);
> - return -EFAULT;
> -}
> -
> #if IS_ENABLED(CONFIG_OF_IRQ)
> /**
> * of_irq_parse_pci - Resolve the interrupt for a PCI device
> diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
> index 4fa654e..432b53c 100644
> --- a/include/linux/of_iommu.h
> +++ b/include/linux/of_iommu.h
> @@ -15,6 +15,10 @@ extern int of_get_dma_window(struct device_node *dn, const char *prefix,
> extern const struct iommu_ops *of_iommu_configure(struct device *dev,
> struct device_node *master_np);
>
> +int of_map_rid(struct device_node *np, u32 rid,
> + const char *map_name, const char *map_mask_name,
> + struct device_node **target, u32 *id_out);
> +
> #else
>
> static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
> @@ -30,6 +34,13 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
> return NULL;
> }
>
> +static inline int of_map_rid(struct device_node *np, u32 rid,
> + const char *map_name, const char *map_mask_name,
> + struct device_node **target, u32 *id_out)
> +{
> + return -EINVAL;
> +}
> +
> #endif /* CONFIG_OF_IOMMU */
>
> extern struct of_device_id __iommu_of_table;
> diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
> index 091033a..a23b44a 100644
> --- a/include/linux/of_pci.h
> +++ b/include/linux/of_pci.h
> @@ -17,9 +17,6 @@ struct device_node *of_pci_find_child_device(struct device_node *parent,
> int of_get_pci_domain_nr(struct device_node *node);
> int of_pci_get_max_link_speed(struct device_node *node);
> void of_pci_check_probe_only(void);
> -int of_pci_map_rid(struct device_node *np, u32 rid,
> - const char *map_name, const char *map_mask_name,
> - struct device_node **target, u32 *id_out);
> #else
> static inline struct device_node *of_pci_find_child_device(struct device_node *parent,
> unsigned int devfn)
> @@ -44,13 +41,6 @@ static inline int of_pci_get_devfn(struct device_node *np)
> return -1;
> }
>
> -static inline int of_pci_map_rid(struct device_node *np, u32 rid,
> - const char *map_name, const char *map_mask_name,
> - struct device_node **target, u32 *id_out)
> -{
> - return -EINVAL;
> -}
> -
> static inline int
> of_pci_get_max_link_speed(struct device_node *node)
> {
>
^ permalink raw reply [flat|nested] 11+ messages in thread* RE: [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for other devices too
2018-04-17 16:52 ` Robin Murphy
@ 2018-04-18 5:09 ` Bharat Bhushan
2018-04-18 6:21 ` Nipun Gupta
1 sibling, 0 replies; 11+ messages in thread
From: Bharat Bhushan @ 2018-04-18 5:09 UTC (permalink / raw)
To: Robin Murphy, Nipun Gupta, robh+dt@kernel.org,
frowand.list@gmail.com
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
stuyoder@gmail.com, linux-pci@vger.kernel.org,
catalin.marinas@arm.com, joro@8bytes.org,
linuxppc-dev@lists.ozlabs.org, will.deacon@arm.com,
linux-kernel@vger.kernel.org, Leo Li,
iommu@lists.linux-foundation.org, gregkh@linuxfoundation.org,
bhelgaas@google.com, Laurentiu Tudor, shawnguo@kernel.org,
hch@lst.de, linux-arm-kernel@lists.infradead.org,
m.szyprowski@samsung.com
> -----Original Message-----
> From: Robin Murphy [mailto:robin.murphy@arm.com]
> Sent: Tuesday, April 17, 2018 10:23 PM
> To: Nipun Gupta <nipun.gupta@nxp.com>; robh+dt@kernel.org;
> frowand.list@gmail.com
> Cc: will.deacon@arm.com; mark.rutland@arm.com; catalin.marinas@arm.com;
> hch@lst.de; gregkh@linuxfoundation.org; joro@8bytes.org;
> m.szyprowski@samsung.com; shawnguo@kernel.org; bhelgaas@google.com;
> iommu@lists.linux-foundation.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linuxppc-
> dev@lists.ozlabs.org; linux-pci@vger.kernel.org; Bharat Bhushan
> <bharat.bhushan@nxp.com>; stuyoder@gmail.com; Laurentiu Tudor
> <laurentiu.tudor@nxp.com>; Leo Li <leoyang.li@nxp.com>
> Subject: Re: [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for
> other devices too
>
> On 17/04/18 11:21, Nipun Gupta wrote:
> > iommu-map property is also used by devices with fsl-mc. This patch
> > moves the of_pci_map_rid to generic location, so that it can be used
> > by other busses too.
Nipun, please clarify that only function name is changed and rest of body is same.
> >
> > Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
> > ---
> > drivers/iommu/of_iommu.c | 106
> > +++++++++++++++++++++++++++++++++++++++++++++--
>
> Doesn't this break "msi-parent" parsing for !CONFIG_OF_IOMMU?
Yes, this will be a problem with MSI
> I guess you
> don't want fsl-mc to have to depend on PCI, but this looks like a step in the
> wrong direction.
>
> I'm not entirely sure where of_map_rid() fits best, but from a quick look around
> the least-worst option might be drivers/of/of_address.c, unless Rob and Frank
> have a better idea of where generic DT-based ID translation routines could live?
drivers/of/address.c may be proper place to move until someone have better idea.
Thanks
-Bharat
>
> > drivers/of/irq.c | 6 +--
> > drivers/pci/of.c | 101 --------------------------------------------
> > include/linux/of_iommu.h | 11 +++++
> > include/linux/of_pci.h | 10 -----
> > 5 files changed, 117 insertions(+), 117 deletions(-)
> >
> > diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index
> > 5c36a8b..4e7712f 100644
> > --- a/drivers/iommu/of_iommu.c
> > +++ b/drivers/iommu/of_iommu.c
> > @@ -138,6 +138,106 @@ static int of_iommu_xlate(struct device *dev,
> > return ops->of_xlate(dev, iommu_spec);
> > }
> >
> > +/**
> > + * of_map_rid - Translate a requester ID through a downstream mapping.
> > + * @np: root complex device node.
> > + * @rid: device requester 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
> > + * 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
> > + * a non-NULL device node pointer, only entries targeting that node
> > +will be
> > + * matched; if it points to a NULL value, it will receive the device
> > +node of
> > + * the first matching target phandle, with a reference held.
> > + *
> > + * Return: 0 on success or a standard error code on failure.
> > + */
> > +int of_map_rid(struct device_node *np, u32 rid,
> > + const char *map_name, const char *map_mask_name,
> > + struct device_node **target, u32 *id_out) {
> > + u32 map_mask, masked_rid;
> > + int map_len;
> > + const __be32 *map = NULL;
> > +
> > + if (!np || !map_name || (!target && !id_out))
> > + return -EINVAL;
> > +
> > + map = of_get_property(np, map_name, &map_len);
> > + if (!map) {
> > + if (target)
> > + return -ENODEV;
> > + /* Otherwise, no map implies no translation */
> > + *id_out = rid;
> > + return 0;
> > + }
> > +
> > + if (!map_len || map_len % (4 * sizeof(*map))) {
> > + pr_err("%pOF: Error: Bad %s length: %d\n", np,
> > + map_name, map_len);
> > + return -EINVAL;
> > + }
> > +
> > + /* The default is to select all bits. */
> > + map_mask = 0xffffffff;
> > +
> > + /*
> > + * Can be overridden by "{iommu,msi}-map-mask" property.
> > + */
> > + if (map_mask_name)
> > + of_property_read_u32(np, map_mask_name, &map_mask);
> > +
> > + masked_rid = map_mask & rid;
> > + 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 phandle = be32_to_cpup(map + 1);
> > + u32 out_base = be32_to_cpup(map + 2);
> > + u32 rid_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",
> > + np, map_name, map_name,
> > + map_mask, rid_base);
> > + return -EFAULT;
> > + }
> > +
> > + if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
> > + continue;
> > +
> > + phandle_node = of_find_node_by_phandle(phandle);
> > + if (!phandle_node)
> > + return -ENODEV;
> > +
> > + if (target) {
> > + if (*target)
> > + of_node_put(phandle_node);
> > + else
> > + *target = phandle_node;
> > +
> > + if (*target != phandle_node)
> > + continue;
> > + }
> > +
> > + if (id_out)
> > + *id_out = masked_rid - rid_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);
> > + return 0;
> > + }
> > +
> > + pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on
> %pOF\n",
> > + np, map_name, rid, target && *target ? *target : NULL);
> > + return -EFAULT;
> > +}
> > +
> > struct of_pci_iommu_alias_info {
> > struct device *dev;
> > struct device_node *np;
> > @@ -149,9 +249,9 @@ static int of_pci_iommu_init(struct pci_dev *pdev, u16
> alias, void *data)
> > struct of_phandle_args iommu_spec = { .args_count = 1 };
> > int err;
> >
> > - err = of_pci_map_rid(info->np, alias, "iommu-map",
> > - "iommu-map-mask", &iommu_spec.np,
> > - iommu_spec.args);
> > + err = of_map_rid(info->np, alias, "iommu-map",
> > + "iommu-map-mask", &iommu_spec.np,
> > + iommu_spec.args);
>
> Super-nit: Apparently I missed rewrapping this to 2 lines in d87beb749281, but if
> it's being touched again, that would be nice ;)
>
> Robin.
>
> > if (err)
> > return err == -ENODEV ? NO_IOMMU : err;
> >
> > diff --git a/drivers/of/irq.c b/drivers/of/irq.c index
> > 02ad93a..b72eeec 100644
> > --- a/drivers/of/irq.c
> > +++ b/drivers/of/irq.c
> > @@ -22,7 +22,7 @@
> > #include <linux/module.h>
> > #include <linux/of.h>
> > #include <linux/of_irq.h>
> > -#include <linux/of_pci.h>
> > +#include <linux/of_iommu.h>
> > #include <linux/string.h>
> > #include <linux/slab.h>
> >
> > @@ -588,8 +588,8 @@ 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_pci_map_rid(parent_dev->of_node, rid_in, "msi-map",
> > - "msi-map-mask", np, &rid_out))
> > + if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map",
> > + "msi-map-mask", np, &rid_out))
> > break;
> > return rid_out;
> > }
> > diff --git a/drivers/pci/of.c b/drivers/pci/of.c index
> > a28355c..d2cebbe 100644
> > --- a/drivers/pci/of.c
> > +++ b/drivers/pci/of.c
> > @@ -362,107 +362,6 @@ int of_pci_get_host_bridge_resources(struct
> device_node *dev,
> > EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources);
> > #endif /* CONFIG_OF_ADDRESS */
> >
> > -/**
> > - * of_pci_map_rid - Translate a requester ID through a downstream mapping.
> > - * @np: root complex device node.
> > - * @rid: PCI requester 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 PCI requester 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
> > - * a non-NULL device node pointer, only entries targeting that node
> > will be
> > - * matched; if it points to a NULL value, it will receive the device
> > node of
> > - * the first matching target phandle, with a reference held.
> > - *
> > - * Return: 0 on success or a standard error code on failure.
> > - */
> > -int of_pci_map_rid(struct device_node *np, u32 rid,
> > - const char *map_name, const char *map_mask_name,
> > - struct device_node **target, u32 *id_out)
> > -{
> > - u32 map_mask, masked_rid;
> > - int map_len;
> > - const __be32 *map = NULL;
> > -
> > - if (!np || !map_name || (!target && !id_out))
> > - return -EINVAL;
> > -
> > - map = of_get_property(np, map_name, &map_len);
> > - if (!map) {
> > - if (target)
> > - return -ENODEV;
> > - /* Otherwise, no map implies no translation */
> > - *id_out = rid;
> > - return 0;
> > - }
> > -
> > - if (!map_len || map_len % (4 * sizeof(*map))) {
> > - pr_err("%pOF: Error: Bad %s length: %d\n", np,
> > - map_name, map_len);
> > - return -EINVAL;
> > - }
> > -
> > - /* The default is to select all bits. */
> > - map_mask = 0xffffffff;
> > -
> > - /*
> > - * Can be overridden by "{iommu,msi}-map-mask" property.
> > - * If of_property_read_u32() fails, the default is used.
> > - */
> > - if (map_mask_name)
> > - of_property_read_u32(np, map_mask_name, &map_mask);
> > -
> > - masked_rid = map_mask & rid;
> > - 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 phandle = be32_to_cpup(map + 1);
> > - u32 out_base = be32_to_cpup(map + 2);
> > - u32 rid_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",
> > - np, map_name, map_name,
> > - map_mask, rid_base);
> > - return -EFAULT;
> > - }
> > -
> > - if (masked_rid < rid_base || masked_rid >= rid_base + rid_len)
> > - continue;
> > -
> > - phandle_node = of_find_node_by_phandle(phandle);
> > - if (!phandle_node)
> > - return -ENODEV;
> > -
> > - if (target) {
> > - if (*target)
> > - of_node_put(phandle_node);
> > - else
> > - *target = phandle_node;
> > -
> > - if (*target != phandle_node)
> > - continue;
> > - }
> > -
> > - if (id_out)
> > - *id_out = masked_rid - rid_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);
> > - return 0;
> > - }
> > -
> > - pr_err("%pOF: Invalid %s translation - no match for rid 0x%x on
> %pOF\n",
> > - np, map_name, rid, target && *target ? *target : NULL);
> > - return -EFAULT;
> > -}
> > -
> > #if IS_ENABLED(CONFIG_OF_IRQ)
> > /**
> > * of_irq_parse_pci - Resolve the interrupt for a PCI device diff
> > --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h index
> > 4fa654e..432b53c 100644
> > --- a/include/linux/of_iommu.h
> > +++ b/include/linux/of_iommu.h
> > @@ -15,6 +15,10 @@ extern int of_get_dma_window(struct device_node
> *dn, const char *prefix,
> > extern const struct iommu_ops *of_iommu_configure(struct device *dev,
> > struct device_node *master_np);
> >
> > +int of_map_rid(struct device_node *np, u32 rid,
> > + const char *map_name, const char *map_mask_name,
> > + struct device_node **target, u32 *id_out);
> > +
> > #else
> >
> > static inline int of_get_dma_window(struct device_node *dn, const
> > char *prefix, @@ -30,6 +34,13 @@ static inline const struct iommu_ops
> *of_iommu_configure(struct device *dev,
> > return NULL;
> > }
> >
> > +static inline int of_map_rid(struct device_node *np, u32 rid,
> > + const char *map_name, const char
> *map_mask_name,
> > + struct device_node **target, u32 *id_out) {
> > + return -EINVAL;
> > +}
> > +
> > #endif /* CONFIG_OF_IOMMU */
> >
> > extern struct of_device_id __iommu_of_table; diff --git
> > a/include/linux/of_pci.h b/include/linux/of_pci.h index
> > 091033a..a23b44a 100644
> > --- a/include/linux/of_pci.h
> > +++ b/include/linux/of_pci.h
> > @@ -17,9 +17,6 @@ struct device_node *of_pci_find_child_device(struct
> device_node *parent,
> > int of_get_pci_domain_nr(struct device_node *node);
> > int of_pci_get_max_link_speed(struct device_node *node);
> > void of_pci_check_probe_only(void);
> > -int of_pci_map_rid(struct device_node *np, u32 rid,
> > - const char *map_name, const char *map_mask_name,
> > - struct device_node **target, u32 *id_out);
> > #else
> > static inline struct device_node *of_pci_find_child_device(struct device_node
> *parent,
> > unsigned int devfn)
> > @@ -44,13 +41,6 @@ static inline int of_pci_get_devfn(struct device_node
> *np)
> > return -1;
> > }
> >
> > -static inline int of_pci_map_rid(struct device_node *np, u32 rid,
> > - const char *map_name, const char *map_mask_name,
> > - struct device_node **target, u32 *id_out)
> > -{
> > - return -EINVAL;
> > -}
> > -
> > static inline int
> > of_pci_get_max_link_speed(struct device_node *node)
> > {
> >
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 11+ messages in thread* RE: [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for other devices too
2018-04-17 16:52 ` Robin Murphy
2018-04-18 5:09 ` Bharat Bhushan
@ 2018-04-18 6:21 ` Nipun Gupta
1 sibling, 0 replies; 11+ messages in thread
From: Nipun Gupta @ 2018-04-18 6:21 UTC (permalink / raw)
To: Robin Murphy, robh+dt@kernel.org, frowand.list@gmail.com
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
stuyoder@gmail.com, Bharat Bhushan, linux-pci@vger.kernel.org,
catalin.marinas@arm.com, joro@8bytes.org,
linuxppc-dev@lists.ozlabs.org, will.deacon@arm.com,
linux-kernel@vger.kernel.org, Leo Li,
iommu@lists.linux-foundation.org, gregkh@linuxfoundation.org,
bhelgaas@google.com, Laurentiu Tudor, shawnguo@kernel.org,
hch@lst.de, linux-arm-kernel@lists.infradead.org,
m.szyprowski@samsung.com
> -----Original Message-----
> From: Robin Murphy [mailto:robin.murphy@arm.com]
> Sent: Tuesday, April 17, 2018 10:23 PM
> To: Nipun Gupta <nipun.gupta@nxp.com>; robh+dt@kernel.org;
> frowand.list@gmail.com
> Cc: will.deacon@arm.com; mark.rutland@arm.com; catalin.marinas@arm.com;
> hch@lst.de; gregkh@linuxfoundation.org; joro@8bytes.org;
> m.szyprowski@samsung.com; shawnguo@kernel.org; bhelgaas@google.com;
> iommu@lists.linux-foundation.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linuxppc-
> dev@lists.ozlabs.org; linux-pci@vger.kernel.org; Bharat Bhushan
> <bharat.bhushan@nxp.com>; stuyoder@gmail.com; Laurentiu Tudor
> <laurentiu.tudor@nxp.com>; Leo Li <leoyang.li@nxp.com>
> Subject: Re: [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for
> other devices too
>
> On 17/04/18 11:21, Nipun Gupta wrote:
> > iommu-map property is also used by devices with fsl-mc. This patch
> > moves the of_pci_map_rid to generic location, so that it can be used
> > by other busses too.
> >
> > Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
> > ---
> > drivers/iommu/of_iommu.c | 106
> > +++++++++++++++++++++++++++++++++++++++++++++--
>
> Doesn't this break "msi-parent" parsing for !CONFIG_OF_IOMMU? I guess you
> don't want fsl-mc to have to depend on PCI, but this looks like a step in the
> wrong direction.
Thanks for pointing out.
Agree, this will break "msi-parent" parsing for !CONFIG_OF_IOMMU case.
>
> I'm not entirely sure where of_map_rid() fits best, but from a quick look around
> the least-worst option might be drivers/of/of_address.c, unless Rob and Frank
> have a better idea of where generic DT-based ID translation routines could live?
>
> > drivers/of/irq.c | 6 +--
> > drivers/pci/of.c | 101 --------------------------------------------
> > include/linux/of_iommu.h | 11 +++++
> > include/linux/of_pci.h | 10 -----
> > 5 files changed, 117 insertions(+), 117 deletions(-)
> >
[...]
> > struct of_pci_iommu_alias_info {
> > struct device *dev;
> > struct device_node *np;
> > @@ -149,9 +249,9 @@ static int of_pci_iommu_init(struct pci_dev *pdev, u16
> alias, void *data)
> > struct of_phandle_args iommu_spec = { .args_count = 1 };
> > int err;
> >
> > - err = of_pci_map_rid(info->np, alias, "iommu-map",
> > - "iommu-map-mask", &iommu_spec.np,
> > - iommu_spec.args);
> > + err = of_map_rid(info->np, alias, "iommu-map",
> > + "iommu-map-mask", &iommu_spec.np,
> > + iommu_spec.args);
>
> Super-nit: Apparently I missed rewrapping this to 2 lines in d87beb749281, but if
> it's being touched again, that would be nice ;)
Sure.. I'll take care of this in the next version :)
Regards,
Nipun
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH 3/6 v2] iommu: support iommu configuration for fsl-mc devices
2018-04-17 10:21 ` [PATCH 0/6 v2] Support for fsl-mc bus and its devices in SMMU Nipun Gupta
2018-04-17 10:21 ` [PATCH 1/6 v2] Docs: dt: add fsl-mc iommu-map device-tree binding Nipun Gupta
2018-04-17 10:21 ` [PATCH 2/6 v2] iommu: of: make of_pci_map_rid() available for other devices too Nipun Gupta
@ 2018-04-17 10:21 ` Nipun Gupta
2018-04-17 10:21 ` [PATCH 4/6 v2] iommu: arm-smmu: Add support for the fsl-mc bus Nipun Gupta
` (2 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Nipun Gupta @ 2018-04-17 10:21 UTC (permalink / raw)
To: robin.murphy, will.deacon, mark.rutland, catalin.marinas
Cc: devicetree, bharat.bhushan, stuyoder, frowand.list, gregkh, joro,
linuxppc-dev, linux-kernel, leoyang.li, iommu, robh+dt,
Nipun Gupta, linux-pci, bhelgaas, laurentiu.tudor, shawnguo, hch,
linux-arm-kernel, m.szyprowski
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
drivers/iommu/of_iommu.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 4e7712f..af4fc3b 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -24,6 +24,7 @@
#include <linux/of_iommu.h>
#include <linux/of_pci.h>
#include <linux/slab.h>
+#include <linux/fsl/mc.h>
#define NO_IOMMU 1
@@ -260,6 +261,23 @@ static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
return err;
}
+static int of_fsl_mc_iommu_init(struct fsl_mc_device *mc_dev,
+ struct device_node *master_np)
+{
+ struct of_phandle_args iommu_spec = { .args_count = 1 };
+ int err;
+
+ err = of_map_rid(master_np, mc_dev->icid, "iommu-map",
+ "iommu-map-mask", &iommu_spec.np,
+ iommu_spec.args);
+ if (err)
+ return err == -ENODEV ? NO_IOMMU : err;
+
+ err = of_iommu_xlate(&mc_dev->dev, &iommu_spec);
+ of_node_put(iommu_spec.np);
+ return err;
+}
+
const struct iommu_ops *of_iommu_configure(struct device *dev,
struct device_node *master_np)
{
@@ -291,6 +309,8 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
err = pci_for_each_dma_alias(to_pci_dev(dev),
of_pci_iommu_init, &info);
+ } else if (dev_is_fsl_mc(dev)) {
+ err = of_fsl_mc_iommu_init(to_fsl_mc_device(dev), master_np);
} else {
struct of_phandle_args iommu_spec;
int idx = 0;
--
1.9.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH 4/6 v2] iommu: arm-smmu: Add support for the fsl-mc bus
2018-04-17 10:21 ` [PATCH 0/6 v2] Support for fsl-mc bus and its devices in SMMU Nipun Gupta
` (2 preceding siblings ...)
2018-04-17 10:21 ` [PATCH 3/6 v2] iommu: support iommu configuration for fsl-mc devices Nipun Gupta
@ 2018-04-17 10:21 ` Nipun Gupta
2018-04-17 10:21 ` [PATCH 5/6 v2] bus: fsl-mc: supoprt dma configure for devices on " Nipun Gupta
2018-04-17 10:21 ` [PATCH 6/6 v2] arm64: dts: ls208xa: comply with the iommu map binding for fsl_mc Nipun Gupta
5 siblings, 0 replies; 11+ messages in thread
From: Nipun Gupta @ 2018-04-17 10:21 UTC (permalink / raw)
To: robin.murphy, will.deacon, mark.rutland, catalin.marinas
Cc: hch, gregkh, joro, robh+dt, m.szyprowski, shawnguo, frowand.list,
bhelgaas, iommu, linux-kernel, devicetree, linux-arm-kernel,
linuxppc-dev, linux-pci, bharat.bhushan, stuyoder,
laurentiu.tudor, leoyang.li, Nipun Gupta
Implement bus specific support for the fsl-mc bus including
registering arm_smmu_ops and bus specific device add operations.
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
drivers/iommu/arm-smmu.c | 7 +++++++
drivers/iommu/iommu.c | 21 +++++++++++++++++++++
include/linux/fsl/mc.h | 8 ++++++++
include/linux/iommu.h | 2 ++
4 files changed, 38 insertions(+)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 69e7c60..e1d5090 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -52,6 +52,7 @@
#include <linux/spinlock.h>
#include <linux/amba/bus.h>
+#include <linux/fsl/mc.h>
#include "io-pgtable.h"
#include "arm-smmu-regs.h"
@@ -1459,6 +1460,8 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev)
if (dev_is_pci(dev))
group = pci_device_group(dev);
+ else if (dev_is_fsl_mc(dev))
+ group = fsl_mc_device_group(dev);
else
group = generic_device_group(dev);
@@ -2037,6 +2040,10 @@ static void arm_smmu_bus_init(void)
bus_set_iommu(&pci_bus_type, &arm_smmu_ops);
}
#endif
+#ifdef CONFIG_FSL_MC_BUS
+ if (!iommu_present(&fsl_mc_bus_type))
+ bus_set_iommu(&fsl_mc_bus_type, &arm_smmu_ops);
+#endif
}
static int arm_smmu_device_probe(struct platform_device *pdev)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 69fef99..fbeebb2 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -32,6 +32,7 @@
#include <linux/pci.h>
#include <linux/bitops.h>
#include <linux/property.h>
+#include <linux/fsl/mc.h>
#include <trace/events/iommu.h>
static struct kset *iommu_group_kset;
@@ -987,6 +988,26 @@ struct iommu_group *pci_device_group(struct device *dev)
return iommu_group_alloc();
}
+/* Get the IOMMU group for device on fsl-mc bus */
+struct iommu_group *fsl_mc_device_group(struct device *dev)
+{
+ struct device *cont_dev = fsl_mc_cont_dev(dev);
+ struct iommu_group *group;
+
+ /* Container device is responsible for creating the iommu group */
+ if (fsl_mc_is_cont_dev(dev)) {
+ group = iommu_group_alloc();
+ if (IS_ERR(group))
+ return NULL;
+ } else {
+ get_device(cont_dev);
+ group = iommu_group_get(cont_dev);
+ put_device(cont_dev);
+ }
+
+ return group;
+}
+
/**
* iommu_group_get_for_dev - Find or create the IOMMU group for a device
* @dev: target device
diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h
index f27cb14..dddaca1 100644
--- a/include/linux/fsl/mc.h
+++ b/include/linux/fsl/mc.h
@@ -351,6 +351,14 @@ struct fsl_mc_io {
#define dev_is_fsl_mc(_dev) (0)
#endif
+/* Macro to check if a device is a container device */
+#define fsl_mc_is_cont_dev(_dev) (to_fsl_mc_device(_dev)->flags & \
+ FSL_MC_IS_DPRC)
+
+/* Macro to get the container device of a MC device */
+#define fsl_mc_cont_dev(_dev) (fsl_mc_is_cont_dev(_dev) ? \
+ (_dev) : (_dev)->parent)
+
/*
* module_fsl_mc_driver() - Helper macro for drivers that don't do
* anything special in module init/exit. This eliminates a lot of
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 41b8c57..00a460b 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -389,6 +389,8 @@ static inline size_t iommu_map_sg(struct iommu_domain *domain,
extern struct iommu_group *pci_device_group(struct device *dev);
/* Generic device grouping function */
extern struct iommu_group *generic_device_group(struct device *dev);
+/* FSL-MC device grouping function */
+struct iommu_group *fsl_mc_device_group(struct device *dev);
/**
* struct iommu_fwspec - per-device IOMMU instance data
--
1.9.1
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH 5/6 v2] bus: fsl-mc: supoprt dma configure for devices on fsl-mc bus
2018-04-17 10:21 ` [PATCH 0/6 v2] Support for fsl-mc bus and its devices in SMMU Nipun Gupta
` (3 preceding siblings ...)
2018-04-17 10:21 ` [PATCH 4/6 v2] iommu: arm-smmu: Add support for the fsl-mc bus Nipun Gupta
@ 2018-04-17 10:21 ` Nipun Gupta
2018-04-26 0:00 ` kbuild test robot
2018-04-17 10:21 ` [PATCH 6/6 v2] arm64: dts: ls208xa: comply with the iommu map binding for fsl_mc Nipun Gupta
5 siblings, 1 reply; 11+ messages in thread
From: Nipun Gupta @ 2018-04-17 10:21 UTC (permalink / raw)
To: robin.murphy, will.deacon, mark.rutland, catalin.marinas
Cc: hch, gregkh, joro, robh+dt, m.szyprowski, shawnguo, frowand.list,
bhelgaas, iommu, linux-kernel, devicetree, linux-arm-kernel,
linuxppc-dev, linux-pci, bharat.bhushan, stuyoder,
laurentiu.tudor, leoyang.li, Nipun Gupta
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
drivers/bus/fsl-mc/fsl-mc-bus.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
index 5d8266c..624828b 100644
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -127,6 +127,16 @@ static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
return 0;
}
+static int fsl_mc_dma_configure(struct device *dev)
+{
+ struct device *dma_dev = dev;
+
+ while (dev_is_fsl_mc(dma_dev))
+ dma_dev = dma_dev->parent;
+
+ return of_dma_configure(dev, dma_dev->of_node, 0);
+}
+
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -148,6 +158,7 @@ struct bus_type fsl_mc_bus_type = {
.name = "fsl-mc",
.match = fsl_mc_bus_match,
.uevent = fsl_mc_bus_uevent,
+ .dma_configure = fsl_mc_dma_configure,
.dev_groups = fsl_mc_dev_groups,
};
EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
@@ -616,6 +627,7 @@ int fsl_mc_device_add(struct fsl_mc_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;
+ mc_dev->dev.coherent_dma_mask = mc_dev->dma_mask;
dev_set_msi_domain(&mc_dev->dev,
dev_get_msi_domain(&parent_mc_dev->dev));
}
@@ -633,10 +645,6 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
goto error_cleanup_dev;
}
- /* Objects are coherent, unless 'no shareability' flag set. */
- if (!(obj_desc->flags & FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY))
- arch_setup_dma_ops(&mc_dev->dev, 0, 0, NULL, true);
-
/*
* The device-specific probe callback will get invoked by device_add()
*/
--
1.9.1
^ permalink raw reply related [flat|nested] 11+ messages in thread* Re: [PATCH 5/6 v2] bus: fsl-mc: supoprt dma configure for devices on fsl-mc bus
2018-04-17 10:21 ` [PATCH 5/6 v2] bus: fsl-mc: supoprt dma configure for devices on " Nipun Gupta
@ 2018-04-26 0:00 ` kbuild test robot
0 siblings, 0 replies; 11+ messages in thread
From: kbuild test robot @ 2018-04-26 0:00 UTC (permalink / raw)
To: Nipun Gupta
Cc: mark.rutland, stuyoder, linux-pci, will.deacon, shawnguo,
bharat.bhushan, hch, m.szyprowski, frowand.list, joro,
catalin.marinas, devicetree, robin.murphy, robh+dt, Nipun Gupta,
bhelgaas, linux-arm-kernel, laurentiu.tudor, gregkh, linux-kernel,
leoyang.li, iommu, kbuild-all, linuxppc-dev
[-- Attachment #1: Type: text/plain, Size: 2834 bytes --]
Hi Nipun,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.17-rc2 next-20180424]
[cannot apply to iommu/next glikely/devicetree/next]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Nipun-Gupta/Support-for-fsl-mc-bus-and-its-devices-in-SMMU/20180418-034931
config: powerpc64-allmodconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=powerpc64
All errors (new ones prefixed by >>):
drivers/bus/fsl-mc/fsl-mc-bus.c: In function 'fsl_mc_dma_configure':
>> drivers/bus/fsl-mc/fsl-mc-bus.c:137:9: error: too many arguments to function 'of_dma_configure'
return of_dma_configure(dev, dma_dev->of_node, 0);
^~~~~~~~~~~~~~~~
In file included from drivers/bus/fsl-mc/fsl-mc-bus.c:13:0:
include/linux/of_device.h:58:5: note: declared here
int of_dma_configure(struct device *dev, struct device_node *np);
^~~~~~~~~~~~~~~~
drivers/bus/fsl-mc/fsl-mc-bus.c: At top level:
>> drivers/bus/fsl-mc/fsl-mc-bus.c:161:3: error: 'struct bus_type' has no member named 'dma_configure'
.dma_configure = fsl_mc_dma_configure,
^~~~~~~~~~~~~
vim +/of_dma_configure +137 drivers/bus/fsl-mc/fsl-mc-bus.c
129
130 static int fsl_mc_dma_configure(struct device *dev)
131 {
132 struct device *dma_dev = dev;
133
134 while (dev_is_fsl_mc(dma_dev))
135 dma_dev = dma_dev->parent;
136
> 137 return of_dma_configure(dev, dma_dev->of_node, 0);
138 }
139
140 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
141 char *buf)
142 {
143 struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
144
145 return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,
146 mc_dev->obj_desc.type);
147 }
148 static DEVICE_ATTR_RO(modalias);
149
150 static struct attribute *fsl_mc_dev_attrs[] = {
151 &dev_attr_modalias.attr,
152 NULL,
153 };
154
155 ATTRIBUTE_GROUPS(fsl_mc_dev);
156
157 struct bus_type fsl_mc_bus_type = {
158 .name = "fsl-mc",
159 .match = fsl_mc_bus_match,
160 .uevent = fsl_mc_bus_uevent,
> 161 .dma_configure = fsl_mc_dma_configure,
162 .dev_groups = fsl_mc_dev_groups,
163 };
164 EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
165
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH 6/6 v2] arm64: dts: ls208xa: comply with the iommu map binding for fsl_mc
2018-04-17 10:21 ` [PATCH 0/6 v2] Support for fsl-mc bus and its devices in SMMU Nipun Gupta
` (4 preceding siblings ...)
2018-04-17 10:21 ` [PATCH 5/6 v2] bus: fsl-mc: supoprt dma configure for devices on " Nipun Gupta
@ 2018-04-17 10:21 ` Nipun Gupta
5 siblings, 0 replies; 11+ messages in thread
From: Nipun Gupta @ 2018-04-17 10:21 UTC (permalink / raw)
To: robin.murphy, will.deacon, mark.rutland, catalin.marinas
Cc: hch, gregkh, joro, robh+dt, m.szyprowski, shawnguo, frowand.list,
bhelgaas, iommu, linux-kernel, devicetree, linux-arm-kernel,
linuxppc-dev, linux-pci, bharat.bhushan, stuyoder,
laurentiu.tudor, leoyang.li, Nipun Gupta
Fsl-mc bus now support the iommu-map property. Comply to this binding for
fsl_mc bus. This patch also updates the dts w.r.t. the DMA configuration.
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi
index f3a40af..1b1c5eb 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi
@@ -135,6 +135,7 @@
#address-cells = <2>;
#size-cells = <2>;
ranges;
+ dma-ranges = <0x0 0x0 0x0 0x0 0x10000 0x00000000>;
clockgen: clocking@1300000 {
compatible = "fsl,ls2080a-clockgen";
@@ -357,6 +358,8 @@
reg = <0x00000008 0x0c000000 0 0x40>, /* MC portal base */
<0x00000000 0x08340000 0 0x40000>; /* MC control reg */
msi-parent = <&its>;
+ iommu-map = <0 &smmu 0 0>; /* This is fixed-up by u-boot */
+ dma-coherent;
#address-cells = <3>;
#size-cells = <1>;
@@ -460,6 +463,8 @@
compatible = "arm,mmu-500";
reg = <0 0x5000000 0 0x800000>;
#global-interrupts = <12>;
+ #iommu-cells = <1>;
+ stream-match-mask = <0x7C00>;
interrupts = <0 13 4>, /* global secure fault */
<0 14 4>, /* combined secure interrupt */
<0 15 4>, /* global non-secure fault */
@@ -502,7 +507,6 @@
<0 204 4>, <0 205 4>,
<0 206 4>, <0 207 4>,
<0 208 4>, <0 209 4>;
- mmu-masters = <&fsl_mc 0x300 0>;
};
dspi: dspi@2100000 {
--
1.9.1
^ permalink raw reply related [flat|nested] 11+ messages in thread