For DT, of_dma_get_range returns bus_dma_region typed dma regions,
which makes multiple dma windows with different offset available
for translation between dma address and cpu address.
But for ACPI, acpi_dma_get_range doesn't return similar dma regions,
causing no path for setting dev->dma_range_map conveniently. So the
patch changes acpi_dma_get_range and returns bus_dma_region typed
dma regions according to of_dma_get_range.
After changing acpi_dma_get_range, acpi_arch_dma_setup is changed for
ARM64, where original dma_addr and size are removed as these
arguments are now redundant, and pass 0 and U64_MAX for dma_base
and size of arch_setup_dma_ops, so this is a simplification consistent
with what other ACPI architectures also pass to iommu_setup_dma_ops().
Signed-off-by: Jianmin Lv <[email protected]>
---
drivers/acpi/arm64/dma.c | 29 ++++++++++++++++----------
drivers/acpi/scan.c | 53 +++++++++++++++++++++---------------------------
include/acpi/acpi_bus.h | 3 +--
include/linux/acpi.h | 7 +++----
4 files changed, 45 insertions(+), 47 deletions(-)
diff --git a/drivers/acpi/arm64/dma.c b/drivers/acpi/arm64/dma.c
index f16739a..1ef8e7d 100644
--- a/drivers/acpi/arm64/dma.c
+++ b/drivers/acpi/arm64/dma.c
@@ -4,11 +4,12 @@
#include <linux/device.h>
#include <linux/dma-direct.h>
-void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
+void acpi_arch_dma_setup(struct device *dev)
{
int ret;
u64 end, mask;
- u64 dmaaddr = 0, size = 0, offset = 0;
+ u64 size = 0;
+ const struct bus_dma_region *map = NULL;
/*
* If @dev is expected to be DMA-capable then the bus code that created
@@ -26,25 +27,31 @@ void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
else
size = 1ULL << 32;
- ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size);
+ ret = acpi_dma_get_range(dev, &map);
+ if (!ret && map) {
+ const struct bus_dma_region *r = map;
+
+ for (end = 0; r->size; r++) {
+ if (r->dma_start + r->size - 1 > end)
+ end = r->dma_start + r->size - 1;
+ }
+
+ size = end + 1;
+ dev->dma_range_map = map;
+ }
+
if (ret == -ENODEV)
ret = iort_dma_get_ranges(dev, &size);
+
if (!ret) {
/*
* Limit coherent and dma mask based on size retrieved from
* firmware.
*/
- end = dmaaddr + size - 1;
+ end = size - 1;
mask = DMA_BIT_MASK(ilog2(end) + 1);
dev->bus_dma_limit = end;
dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask);
*dev->dma_mask = min(*dev->dma_mask, mask);
}
-
- *dma_addr = dmaaddr;
- *dma_size = size;
-
- ret = dma_direct_set_offset(dev, dmaaddr + offset, dmaaddr, size);
-
- dev_dbg(dev, "dma_offset(%#08llx)%s\n", offset, ret ? " failed!" : "");
}
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 762b61f..8c0c2ca 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -20,6 +20,7 @@
#include <linux/platform_data/x86/apple.h>
#include <linux/pgtable.h>
#include <linux/crc32.h>
+#include <linux/dma-direct.h>
#include "internal.h"
@@ -1482,25 +1483,21 @@ enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
* acpi_dma_get_range() - Get device DMA parameters.
*
* @dev: device to configure
- * @dma_addr: pointer device DMA address result
- * @offset: pointer to the DMA offset result
- * @size: pointer to DMA range size result
+ * @map: pointer to DMA ranges result
*
- * Evaluate DMA regions and return respectively DMA region start, offset
- * and size in dma_addr, offset and size on parsing success; it does not
- * update the passed in values on failure.
+ * Evaluate DMA regions and return pointer to DMA regions on
+ * parsing success; it does not update the passed in values on failure.
*
* Return 0 on success, < 0 on failure.
*/
-int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
- u64 *size)
+int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map)
{
struct acpi_device *adev;
LIST_HEAD(list);
struct resource_entry *rentry;
int ret;
struct device *dma_dev = dev;
- u64 len, dma_start = U64_MAX, dma_end = 0, dma_offset = 0;
+ struct bus_dma_region *r;
/*
* Walk the device tree chasing an ACPI companion with a _DMA
@@ -1525,31 +1522,28 @@ int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
ret = acpi_dev_get_dma_resources(adev, &list);
if (ret > 0) {
+ r = kcalloc(ret + 1, sizeof(*r), GFP_KERNEL);
+ if (!r) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ *map = r;
+
list_for_each_entry(rentry, &list, node) {
- if (dma_offset && rentry->offset != dma_offset) {
+ if (rentry->res->start >= rentry->res->end) {
ret = -EINVAL;
- dev_warn(dma_dev, "Can't handle multiple windows with different offsets\n");
+ dev_dbg(dma_dev, "Invalid DMA regions configuration\n");
goto out;
}
- dma_offset = rentry->offset;
- /* Take lower and upper limits */
- if (rentry->res->start < dma_start)
- dma_start = rentry->res->start;
- if (rentry->res->end > dma_end)
- dma_end = rentry->res->end;
- }
-
- if (dma_start >= dma_end) {
- ret = -EINVAL;
- dev_dbg(dma_dev, "Invalid DMA regions configuration\n");
- goto out;
+ r->cpu_start = rentry->res->start;
+ r->dma_start = rentry->res->start - rentry->offset;
+ r->size = rentry->res->end - rentry->res->start + 1;
+ r->offset = rentry->offset;
+ r++;
}
- *dma_addr = dma_start - dma_offset;
- len = dma_end - dma_start;
- *size = max(len, len + 1);
- *offset = dma_offset;
}
out:
acpi_dev_free_resource_list(&list);
@@ -1639,20 +1633,19 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
const u32 *input_id)
{
const struct iommu_ops *iommu;
- u64 dma_addr = 0, size = 0;
if (attr == DEV_DMA_NOT_SUPPORTED) {
set_dma_ops(dev, &dma_dummy_ops);
return 0;
}
- acpi_arch_dma_setup(dev, &dma_addr, &size);
+ acpi_arch_dma_setup(dev);
iommu = acpi_iommu_configure_id(dev, input_id);
if (PTR_ERR(iommu) == -EPROBE_DEFER)
return -EPROBE_DEFER;
- arch_setup_dma_ops(dev, dma_addr, size,
+ arch_setup_dma_ops(dev, 0, U64_MAX,
iommu, attr == DEV_DMA_COHERENT);
return 0;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 0dc1ea0b..e106073 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -611,8 +611,7 @@ struct acpi_pci_root {
int acpi_iommu_fwspec_init(struct device *dev, u32 id,
struct fwnode_handle *fwnode,
const struct iommu_ops *ops);
-int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
- u64 *size);
+int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map);
int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
const u32 *input_id);
static inline int acpi_dma_configure(struct device *dev,
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 44975c1..34e0545 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -280,12 +280,12 @@ int acpi_table_parse_madt(enum acpi_madt_type id,
#ifdef CONFIG_ARM64
void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa);
-void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size);
+void acpi_arch_dma_setup(struct device *dev);
#else
static inline void
acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { }
static inline void
-acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size) { }
+acpi_arch_dma_setup(struct device *dev) { }
#endif
int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
@@ -974,8 +974,7 @@ static inline enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
return DEV_DMA_NOT_SUPPORTED;
}
-static inline int acpi_dma_get_range(struct device *dev, u64 *dma_addr,
- u64 *offset, u64 *size)
+static inline int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map)
{
return -ENODEV;
}
--
1.8.3.1
On 2022-08-30 04:01, Jianmin Lv wrote:
> For DT, of_dma_get_range returns bus_dma_region typed dma regions,
> which makes multiple dma windows with different offset available
> for translation between dma address and cpu address.
>
> But for ACPI, acpi_dma_get_range doesn't return similar dma regions,
> causing no path for setting dev->dma_range_map conveniently. So the
> patch changes acpi_dma_get_range and returns bus_dma_region typed
> dma regions according to of_dma_get_range.
>
> After changing acpi_dma_get_range, acpi_arch_dma_setup is changed for
> ARM64, where original dma_addr and size are removed as these
> arguments are now redundant, and pass 0 and U64_MAX for dma_base
> and size of arch_setup_dma_ops, so this is a simplification consistent
> with what other ACPI architectures also pass to iommu_setup_dma_ops().
Other than a micro-nit that acpi_dma_get_range() could probably use
resource_size(),
Reviewed-by: Robin Murphy <[email protected]>
It took me longer than I care to admit to figure out where the implicit
declaration of struct bus_dma_region in the scope of acpi.h and
acpi_bus.h comes from, but in the end I guess it's sufficiently
well-defined by the C spec to be reliable.
Thanks for getting this done!
Robin.
> Signed-off-by: Jianmin Lv <[email protected]>
> ---
> drivers/acpi/arm64/dma.c | 29 ++++++++++++++++----------
> drivers/acpi/scan.c | 53 +++++++++++++++++++++---------------------------
> include/acpi/acpi_bus.h | 3 +--
> include/linux/acpi.h | 7 +++----
> 4 files changed, 45 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/acpi/arm64/dma.c b/drivers/acpi/arm64/dma.c
> index f16739a..1ef8e7d 100644
> --- a/drivers/acpi/arm64/dma.c
> +++ b/drivers/acpi/arm64/dma.c
> @@ -4,11 +4,12 @@
> #include <linux/device.h>
> #include <linux/dma-direct.h>
>
> -void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
> +void acpi_arch_dma_setup(struct device *dev)
> {
> int ret;
> u64 end, mask;
> - u64 dmaaddr = 0, size = 0, offset = 0;
> + u64 size = 0;
> + const struct bus_dma_region *map = NULL;
>
> /*
> * If @dev is expected to be DMA-capable then the bus code that created
> @@ -26,25 +27,31 @@ void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
> else
> size = 1ULL << 32;
>
> - ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size);
> + ret = acpi_dma_get_range(dev, &map);
> + if (!ret && map) {
> + const struct bus_dma_region *r = map;
> +
> + for (end = 0; r->size; r++) {
> + if (r->dma_start + r->size - 1 > end)
> + end = r->dma_start + r->size - 1;
> + }
> +
> + size = end + 1;
> + dev->dma_range_map = map;
> + }
> +
> if (ret == -ENODEV)
> ret = iort_dma_get_ranges(dev, &size);
> +
> if (!ret) {
> /*
> * Limit coherent and dma mask based on size retrieved from
> * firmware.
> */
> - end = dmaaddr + size - 1;
> + end = size - 1;
> mask = DMA_BIT_MASK(ilog2(end) + 1);
> dev->bus_dma_limit = end;
> dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask);
> *dev->dma_mask = min(*dev->dma_mask, mask);
> }
> -
> - *dma_addr = dmaaddr;
> - *dma_size = size;
> -
> - ret = dma_direct_set_offset(dev, dmaaddr + offset, dmaaddr, size);
> -
> - dev_dbg(dev, "dma_offset(%#08llx)%s\n", offset, ret ? " failed!" : "");
> }
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index 762b61f..8c0c2ca 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -20,6 +20,7 @@
> #include <linux/platform_data/x86/apple.h>
> #include <linux/pgtable.h>
> #include <linux/crc32.h>
> +#include <linux/dma-direct.h>
>
> #include "internal.h"
>
> @@ -1482,25 +1483,21 @@ enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
> * acpi_dma_get_range() - Get device DMA parameters.
> *
> * @dev: device to configure
> - * @dma_addr: pointer device DMA address result
> - * @offset: pointer to the DMA offset result
> - * @size: pointer to DMA range size result
> + * @map: pointer to DMA ranges result
> *
> - * Evaluate DMA regions and return respectively DMA region start, offset
> - * and size in dma_addr, offset and size on parsing success; it does not
> - * update the passed in values on failure.
> + * Evaluate DMA regions and return pointer to DMA regions on
> + * parsing success; it does not update the passed in values on failure.
> *
> * Return 0 on success, < 0 on failure.
> */
> -int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
> - u64 *size)
> +int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map)
> {
> struct acpi_device *adev;
> LIST_HEAD(list);
> struct resource_entry *rentry;
> int ret;
> struct device *dma_dev = dev;
> - u64 len, dma_start = U64_MAX, dma_end = 0, dma_offset = 0;
> + struct bus_dma_region *r;
>
> /*
> * Walk the device tree chasing an ACPI companion with a _DMA
> @@ -1525,31 +1522,28 @@ int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
>
> ret = acpi_dev_get_dma_resources(adev, &list);
> if (ret > 0) {
> + r = kcalloc(ret + 1, sizeof(*r), GFP_KERNEL);
> + if (!r) {
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + *map = r;
> +
> list_for_each_entry(rentry, &list, node) {
> - if (dma_offset && rentry->offset != dma_offset) {
> + if (rentry->res->start >= rentry->res->end) {
> ret = -EINVAL;
> - dev_warn(dma_dev, "Can't handle multiple windows with different offsets\n");
> + dev_dbg(dma_dev, "Invalid DMA regions configuration\n");
> goto out;
> }
> - dma_offset = rentry->offset;
>
> - /* Take lower and upper limits */
> - if (rentry->res->start < dma_start)
> - dma_start = rentry->res->start;
> - if (rentry->res->end > dma_end)
> - dma_end = rentry->res->end;
> - }
> -
> - if (dma_start >= dma_end) {
> - ret = -EINVAL;
> - dev_dbg(dma_dev, "Invalid DMA regions configuration\n");
> - goto out;
> + r->cpu_start = rentry->res->start;
> + r->dma_start = rentry->res->start - rentry->offset;
> + r->size = rentry->res->end - rentry->res->start + 1;
> + r->offset = rentry->offset;
> + r++;
> }
>
> - *dma_addr = dma_start - dma_offset;
> - len = dma_end - dma_start;
> - *size = max(len, len + 1);
> - *offset = dma_offset;
> }
> out:
> acpi_dev_free_resource_list(&list);
> @@ -1639,20 +1633,19 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
> const u32 *input_id)
> {
> const struct iommu_ops *iommu;
> - u64 dma_addr = 0, size = 0;
>
> if (attr == DEV_DMA_NOT_SUPPORTED) {
> set_dma_ops(dev, &dma_dummy_ops);
> return 0;
> }
>
> - acpi_arch_dma_setup(dev, &dma_addr, &size);
> + acpi_arch_dma_setup(dev);
>
> iommu = acpi_iommu_configure_id(dev, input_id);
> if (PTR_ERR(iommu) == -EPROBE_DEFER)
> return -EPROBE_DEFER;
>
> - arch_setup_dma_ops(dev, dma_addr, size,
> + arch_setup_dma_ops(dev, 0, U64_MAX,
> iommu, attr == DEV_DMA_COHERENT);
>
> return 0;
> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> index 0dc1ea0b..e106073 100644
> --- a/include/acpi/acpi_bus.h
> +++ b/include/acpi/acpi_bus.h
> @@ -611,8 +611,7 @@ struct acpi_pci_root {
> int acpi_iommu_fwspec_init(struct device *dev, u32 id,
> struct fwnode_handle *fwnode,
> const struct iommu_ops *ops);
> -int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
> - u64 *size);
> +int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map);
> int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
> const u32 *input_id);
> static inline int acpi_dma_configure(struct device *dev,
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 44975c1..34e0545 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -280,12 +280,12 @@ int acpi_table_parse_madt(enum acpi_madt_type id,
>
> #ifdef CONFIG_ARM64
> void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa);
> -void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size);
> +void acpi_arch_dma_setup(struct device *dev);
> #else
> static inline void
> acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { }
> static inline void
> -acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size) { }
> +acpi_arch_dma_setup(struct device *dev) { }
> #endif
>
> int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
> @@ -974,8 +974,7 @@ static inline enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
> return DEV_DMA_NOT_SUPPORTED;
> }
>
> -static inline int acpi_dma_get_range(struct device *dev, u64 *dma_addr,
> - u64 *offset, u64 *size)
> +static inline int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map)
> {
> return -ENODEV;
> }
On 2022/9/5 下午8:20, Robin Murphy wrote:
> On 2022-08-30 04:01, Jianmin Lv wrote:
>> For DT, of_dma_get_range returns bus_dma_region typed dma regions,
>> which makes multiple dma windows with different offset available
>> for translation between dma address and cpu address.
>>
>> But for ACPI, acpi_dma_get_range doesn't return similar dma regions,
>> causing no path for setting dev->dma_range_map conveniently. So the
>> patch changes acpi_dma_get_range and returns bus_dma_region typed
>> dma regions according to of_dma_get_range.
>>
>> After changing acpi_dma_get_range, acpi_arch_dma_setup is changed for
>> ARM64, where original dma_addr and size are removed as these
>> arguments are now redundant, and pass 0 and U64_MAX for dma_base
>> and size of arch_setup_dma_ops, so this is a simplification consistent
>> with what other ACPI architectures also pass to iommu_setup_dma_ops().
>
> Other than a micro-nit that acpi_dma_get_range() could probably use
> resource_size(),
>
Ok, thanks, I'll use resource_size() in acpi_dma_get_range().
> Reviewed-by: Robin Murphy <[email protected]>
>
> It took me longer than I care to admit to figure out where the implicit
> declaration of struct bus_dma_region in the scope of acpi.h and
> acpi_bus.h comes from, but in the end I guess it's sufficiently
> well-defined by the C spec to be reliable.
>
> Thanks for getting this done!
>
It's a pleasure!
> Robin.
>
[...]
On Tue, Sep 06, 2022 at 08:40:48PM +0800, Jianmin Lv wrote:
>
>
> On 2022/9/5 下午8:20, Robin Murphy wrote:
> > On 2022-08-30 04:01, Jianmin Lv wrote:
> > > For DT, of_dma_get_range returns bus_dma_region typed dma regions,
> > > which makes multiple dma windows with different offset available
> > > for translation between dma address and cpu address.
> > >
> > > But for ACPI, acpi_dma_get_range doesn't return similar dma regions,
> > > causing no path for setting dev->dma_range_map conveniently. So the
> > > patch changes acpi_dma_get_range and returns bus_dma_region typed
> > > dma regions according to of_dma_get_range.
> > >
> > > After changing acpi_dma_get_range, acpi_arch_dma_setup is changed for
> > > ARM64, where original dma_addr and size are removed as these
> > > arguments are now redundant, and pass 0 and U64_MAX for dma_base
> > > and size of arch_setup_dma_ops, so this is a simplification consistent
> > > with what other ACPI architectures also pass to iommu_setup_dma_ops().
> >
> > Other than a micro-nit that acpi_dma_get_range() could probably use
> > resource_size(),
> >
>
> Ok, thanks, I'll use resource_size() in acpi_dma_get_range().
Are you reposting this shortly ? We are almost at -rc5, it would
be good if we can proceed promptly.
Thanks,
Lorenzo
> > Reviewed-by: Robin Murphy <[email protected]>
> >
> > It took me longer than I care to admit to figure out where the implicit
> > declaration of struct bus_dma_region in the scope of acpi.h and
> > acpi_bus.h comes from, but in the end I guess it's sufficiently
> > well-defined by the C spec to be reliable.
> >
> > Thanks for getting this done!
> >
>
> It's a pleasure!
>
>
> > Robin.
> >
>
> [...]
>
>
On 2022/9/9 下午4:04, Lorenzo Pieralisi wrote:
> On Tue, Sep 06, 2022 at 08:40:48PM +0800, Jianmin Lv wrote:
>>
>>
>> On 2022/9/5 下午8:20, Robin Murphy wrote:
>>> On 2022-08-30 04:01, Jianmin Lv wrote:
>>>> For DT, of_dma_get_range returns bus_dma_region typed dma regions,
>>>> which makes multiple dma windows with different offset available
>>>> for translation between dma address and cpu address.
>>>>
>>>> But for ACPI, acpi_dma_get_range doesn't return similar dma regions,
>>>> causing no path for setting dev->dma_range_map conveniently. So the
>>>> patch changes acpi_dma_get_range and returns bus_dma_region typed
>>>> dma regions according to of_dma_get_range.
>>>>
>>>> After changing acpi_dma_get_range, acpi_arch_dma_setup is changed for
>>>> ARM64, where original dma_addr and size are removed as these
>>>> arguments are now redundant, and pass 0 and U64_MAX for dma_base
>>>> and size of arch_setup_dma_ops, so this is a simplification consistent
>>>> with what other ACPI architectures also pass to iommu_setup_dma_ops().
>>>
>>> Other than a micro-nit that acpi_dma_get_range() could probably use
>>> resource_size(),
>>>
>>
>> Ok, thanks, I'll use resource_size() in acpi_dma_get_range().
>
> Are you reposting this shortly ? We are almost at -rc5, it would
> be good if we can proceed promptly.
>
> Thanks,
> Lorenzo
>
Ok, I'll send V4 today.
Thanks,
Jianmin
>>> Reviewed-by: Robin Murphy <[email protected]>
>>>
>>> It took me longer than I care to admit to figure out where the implicit
>>> declaration of struct bus_dma_region in the scope of acpi.h and
>>> acpi_bus.h comes from, but in the end I guess it's sufficiently
>>> well-defined by the C spec to be reliable.
>>>
>>> Thanks for getting this done!
>>>
>>
>> It's a pleasure!
>>
>>
>>> Robin.
>>>
>>
>> [...]
>>
>>