* [V7 PATCH 0/3] Introduce ACPI support for ahci_platform driver
@ 2015-03-26 19:13 ` Suravee Suthikulpanit
0 siblings, 0 replies; 12+ messages in thread
From: Suravee Suthikulpanit @ 2015-03-26 19:13 UTC (permalink / raw)
To: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi,
Suravee Suthikulpanit
This patch series introduce ACPI support for AHCI platform driver.
Existing ACPI support for AHCI assumes the device controller is a PCI device.
Since there is no ACPI _CID for generic AHCI controller, the driver
could not use it for matching devices. Therefore, this patch introduces
a mechanism for drivers to match devices using ACPI _CLS method.
_CLS contains PCI-defined class-code.
This patch series also modifies ACPI modalias to add class-code to the
exisiting format, which currently only uses _HID and _CIDs. This is required
to support loadable modules w/ _CLS.
This is rebased from and tested with:
http://git.linaro.org/leg/acpi/acpi.git acpi-5.1-v11
This topic was discussed earlier here (as part of introducing support for
AMD Seattle SATA controller):
http://marc.info/?l=linux-arm-kernel&m=141083492521584&w=2
Changes from V6 (https://lkml.org/lkml/2015/3/25/797)
* Adding Acked-by Mika, and Reviewed-by Hanjun
* Minor clen up to use lower case 0xffffff for cls_msk
(per Mika suggestions).
* Modify the ACPI_DEVICE_CLASS macro to use designated initializer
(per Mika suggestions).
Changes from V5 (https://lkml.org/lkml/2015/3/6/24)
* Rebased and tested with acpi-5.1-v11
* Splitting up the ACPICA changes into a separate patch [1/3].
(per Mika suggestion)
* Adding class-code mask support (per Mika suggestion)
* Use macro to define struct acpi_device_id entry (per Mika suggestion)
* Note: Mika also recommend reordering the member of struct acpi_device_id
and define a macro to be used for declaring each table entry. This is a
large amount of changes, and will be done separtely from this patch series.
Changes from V4 (https://lkml.org/lkml/2015/3/2/56)
* [1/2] Bug fixed: Reorder the declaration of
struct acpi_pnp_device_id cls in the struct acpi_device_info
(include/acpi/actypes.h) since compatible_id_list must be last one.
* [2/2] Added Acked-by: Tejun Heo <tj@kernel.org>
Changes from V3 (https://lkml.org/lkml/2015/2/8/106)
* Instead of introducing new structure acpi_device_cls, add cls into
the acpi_device_id, and modify the __acpi_match_device
to also match for cls. (per Mika suggestion.)
* Add loadable module support, which requires changes in ACPI
modalias. (per Mika suggestion.)
* Rebased and tested with acpi-5.1-v9
Changes from V2 (https://lkml.org/lkml/2015/1/5/662)
* Update with review comment from Rafael in patch 1/2
* Rebased and tested with acpi-5.1-v8
Changes from V1 (https://lkml.org/lkml/2014/12/19/345)
* Rebased to 3.19.0-rc2
* Change from acpi_cls in device_driver to acpi_match_cls (Hanjun comment)
* Change the matching logic in acpi_driver_match_device() due to the new
special PRP0001 _HID.
* Simplify the return type of acpi_match_device_cls() to boolean.
Changes from RFC (https://lkml.org/lkml/2014/12/17/446)
* Remove #ifdef and make non-ACPI version of the acpi_match_device_cls
as inline. (per Arnd)
* Simplify logic to retrieve and evaluate _CLS handle. (per Hanjun)
Suravee Suthikulpanit (3):
ACPICA: Add ACPI _CLS processing
ACPI / scan: Add support for ACPI _CLS device matching
ata: ahci_platform: Add ACPI _CLS matching
drivers/acpi/acpica/acutils.h | 3 ++
drivers/acpi/acpica/nsxfname.c | 21 ++++++++++--
drivers/acpi/acpica/utids.c | 71 +++++++++++++++++++++++++++++++++++++++
drivers/acpi/scan.c | 36 +++++++++++++++++---
drivers/ata/Kconfig | 2 +-
drivers/ata/ahci_platform.c | 9 +++++
include/acpi/acnames.h | 1 +
include/acpi/actypes.h | 4 ++-
include/linux/acpi.h | 13 +++++++
include/linux/mod_devicetable.h | 2 ++
scripts/mod/devicetable-offsets.c | 2 ++
scripts/mod/file2alias.c | 32 ++++++++++++++++--
12 files changed, 186 insertions(+), 10 deletions(-)
--
2.1.0
^ permalink raw reply [flat|nested] 12+ messages in thread* [V7 PATCH 1/3] ACPICA: Add ACPI _CLS processing
2015-03-26 19:13 ` Suravee Suthikulpanit
@ 2015-03-26 19:13 ` Suravee Suthikulpanit
-1 siblings, 0 replies; 12+ messages in thread
From: Suravee Suthikulpanit @ 2015-03-26 19:13 UTC (permalink / raw)
To: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi,
Suravee Suthikulpanit
ACPI Device configuration often contain _CLS object to suppy PCI-defined
class code for the device. This patch introduces logic to process the _CLS
object.
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/acpi/acpica/acutils.h | 3 ++
drivers/acpi/acpica/nsxfname.c | 21 +++++++++++--
drivers/acpi/acpica/utids.c | 71 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 93 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h
index c2f03e8..2aef850 100644
--- a/drivers/acpi/acpica/acutils.h
+++ b/drivers/acpi/acpica/acutils.h
@@ -430,6 +430,9 @@ acpi_status
acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
struct acpi_pnp_device_id_list ** return_cid_list);
+acpi_status
+acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
+ struct acpi_pnp_device_id **return_id);
/*
* utlock - reader/writer locks
*/
diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c
index d66c326..590ef06 100644
--- a/drivers/acpi/acpica/nsxfname.c
+++ b/drivers/acpi/acpica/nsxfname.c
@@ -276,11 +276,12 @@ acpi_get_object_info(acpi_handle handle,
struct acpi_pnp_device_id *hid = NULL;
struct acpi_pnp_device_id *uid = NULL;
struct acpi_pnp_device_id *sub = NULL;
+ struct acpi_pnp_device_id *cls = NULL;
char *next_id_string;
acpi_object_type type;
acpi_name name;
u8 param_count = 0;
- u8 valid = 0;
+ u16 valid = 0;
u32 info_size;
u32 i;
acpi_status status;
@@ -320,7 +321,7 @@ acpi_get_object_info(acpi_handle handle,
if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
/*
* Get extra info for ACPI Device/Processor objects only:
- * Run the Device _HID, _UID, _SUB, and _CID methods.
+ * Run the Device _HID, _UID, _SUB, _CID and _CLS methods.
*
* Note: none of these methods are required, so they may or may
* not be present for this device. The Info->Valid bitfield is used
@@ -351,6 +352,14 @@ acpi_get_object_info(acpi_handle handle,
valid |= ACPI_VALID_SUB;
}
+ /* Execute the Device._CLS method */
+
+ status = acpi_ut_execute_CLS(node, &cls);
+ if (ACPI_SUCCESS(status)) {
+ info_size += cls->length;
+ valid |= ACPI_VALID_CLS;
+ }
+
/* Execute the Device._CID method */
status = acpi_ut_execute_CID(node, &cid_list);
@@ -468,6 +477,11 @@ acpi_get_object_info(acpi_handle handle,
sub, next_id_string);
}
+ if (cls) {
+ next_id_string = acpi_ns_copy_device_id(&info->cls,
+ cls, next_id_string);
+ }
+
if (cid_list) {
info->compatible_id_list.count = cid_list->count;
info->compatible_id_list.list_size = cid_list->list_size;
@@ -507,6 +521,9 @@ cleanup:
if (sub) {
ACPI_FREE(sub);
}
+ if (cls) {
+ ACPI_FREE(cls);
+ }
if (cid_list) {
ACPI_FREE(cid_list);
}
diff --git a/drivers/acpi/acpica/utids.c b/drivers/acpi/acpica/utids.c
index 27431cf..a64b5d1 100644
--- a/drivers/acpi/acpica/utids.c
+++ b/drivers/acpi/acpica/utids.c
@@ -416,3 +416,74 @@ cleanup:
acpi_ut_remove_reference(obj_desc);
return_ACPI_STATUS(status);
}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_execute_CLS
+ *
+ * PARAMETERS: device_node - Node for the device
+ * return_id - Where the string UID is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Executes the _CLS control method that returns PCI-defined
+ * class code of the device. The ACPI spec define _CLS as a
+ * package with three integers. The returned string has format:
+ *
+ * "bbsspp"
+ * where:
+ * bb = Base-class code
+ * ss = Sub-class code
+ * pp = Programming Interface code
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
+ struct acpi_pnp_device_id **return_id)
+{
+ struct acpi_pnp_device_id *cls;
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object **cls_objects;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(ut_execute_CLS);
+ status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CLS,
+ ACPI_BTYPE_PACKAGE, &obj_desc);
+ if (ACPI_FAILURE(status))
+ return_ACPI_STATUS(status);
+
+ cls_objects = obj_desc->package.elements;
+
+ if (obj_desc->common.type == ACPI_TYPE_PACKAGE &&
+ obj_desc->package.count == 3 &&
+ cls_objects[0]->common.type == ACPI_TYPE_INTEGER &&
+ cls_objects[1]->common.type == ACPI_TYPE_INTEGER &&
+ cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
+
+ /* Allocate a buffer for the CLS */
+ cls = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
+ (acpi_size) 7);
+ if (!cls) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ cls->string =
+ ACPI_ADD_PTR(char, cls, sizeof(struct acpi_pnp_device_id));
+
+ sprintf(cls->string, "%02x%02x%02x",
+ (u8)ACPI_TO_INTEGER(cls_objects[0]->integer.value),
+ (u8)ACPI_TO_INTEGER(cls_objects[1]->integer.value),
+ (u8)ACPI_TO_INTEGER(cls_objects[2]->integer.value));
+ cls->length = 7;
+ *return_id = cls;
+ }
+
+cleanup:
+
+ /* On exit, we must delete the return object */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
--
2.1.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* [V7 PATCH 1/3] ACPICA: Add ACPI _CLS processing
@ 2015-03-26 19:13 ` Suravee Suthikulpanit
0 siblings, 0 replies; 12+ messages in thread
From: Suravee Suthikulpanit @ 2015-03-26 19:13 UTC (permalink / raw)
To: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi,
Suravee Suthikulpanit
ACPI Device configuration often contain _CLS object to suppy PCI-defined
class code for the device. This patch introduces logic to process the _CLS
object.
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/acpi/acpica/acutils.h | 3 ++
drivers/acpi/acpica/nsxfname.c | 21 +++++++++++--
drivers/acpi/acpica/utids.c | 71 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 93 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h
index c2f03e8..2aef850 100644
--- a/drivers/acpi/acpica/acutils.h
+++ b/drivers/acpi/acpica/acutils.h
@@ -430,6 +430,9 @@ acpi_status
acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
struct acpi_pnp_device_id_list ** return_cid_list);
+acpi_status
+acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
+ struct acpi_pnp_device_id **return_id);
/*
* utlock - reader/writer locks
*/
diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c
index d66c326..590ef06 100644
--- a/drivers/acpi/acpica/nsxfname.c
+++ b/drivers/acpi/acpica/nsxfname.c
@@ -276,11 +276,12 @@ acpi_get_object_info(acpi_handle handle,
struct acpi_pnp_device_id *hid = NULL;
struct acpi_pnp_device_id *uid = NULL;
struct acpi_pnp_device_id *sub = NULL;
+ struct acpi_pnp_device_id *cls = NULL;
char *next_id_string;
acpi_object_type type;
acpi_name name;
u8 param_count = 0;
- u8 valid = 0;
+ u16 valid = 0;
u32 info_size;
u32 i;
acpi_status status;
@@ -320,7 +321,7 @@ acpi_get_object_info(acpi_handle handle,
if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
/*
* Get extra info for ACPI Device/Processor objects only:
- * Run the Device _HID, _UID, _SUB, and _CID methods.
+ * Run the Device _HID, _UID, _SUB, _CID and _CLS methods.
*
* Note: none of these methods are required, so they may or may
* not be present for this device. The Info->Valid bitfield is used
@@ -351,6 +352,14 @@ acpi_get_object_info(acpi_handle handle,
valid |= ACPI_VALID_SUB;
}
+ /* Execute the Device._CLS method */
+
+ status = acpi_ut_execute_CLS(node, &cls);
+ if (ACPI_SUCCESS(status)) {
+ info_size += cls->length;
+ valid |= ACPI_VALID_CLS;
+ }
+
/* Execute the Device._CID method */
status = acpi_ut_execute_CID(node, &cid_list);
@@ -468,6 +477,11 @@ acpi_get_object_info(acpi_handle handle,
sub, next_id_string);
}
+ if (cls) {
+ next_id_string = acpi_ns_copy_device_id(&info->cls,
+ cls, next_id_string);
+ }
+
if (cid_list) {
info->compatible_id_list.count = cid_list->count;
info->compatible_id_list.list_size = cid_list->list_size;
@@ -507,6 +521,9 @@ cleanup:
if (sub) {
ACPI_FREE(sub);
}
+ if (cls) {
+ ACPI_FREE(cls);
+ }
if (cid_list) {
ACPI_FREE(cid_list);
}
diff --git a/drivers/acpi/acpica/utids.c b/drivers/acpi/acpica/utids.c
index 27431cf..a64b5d1 100644
--- a/drivers/acpi/acpica/utids.c
+++ b/drivers/acpi/acpica/utids.c
@@ -416,3 +416,74 @@ cleanup:
acpi_ut_remove_reference(obj_desc);
return_ACPI_STATUS(status);
}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_execute_CLS
+ *
+ * PARAMETERS: device_node - Node for the device
+ * return_id - Where the string UID is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Executes the _CLS control method that returns PCI-defined
+ * class code of the device. The ACPI spec define _CLS as a
+ * package with three integers. The returned string has format:
+ *
+ * "bbsspp"
+ * where:
+ * bb = Base-class code
+ * ss = Sub-class code
+ * pp = Programming Interface code
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
+ struct acpi_pnp_device_id **return_id)
+{
+ struct acpi_pnp_device_id *cls;
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object **cls_objects;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(ut_execute_CLS);
+ status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CLS,
+ ACPI_BTYPE_PACKAGE, &obj_desc);
+ if (ACPI_FAILURE(status))
+ return_ACPI_STATUS(status);
+
+ cls_objects = obj_desc->package.elements;
+
+ if (obj_desc->common.type == ACPI_TYPE_PACKAGE &&
+ obj_desc->package.count == 3 &&
+ cls_objects[0]->common.type == ACPI_TYPE_INTEGER &&
+ cls_objects[1]->common.type == ACPI_TYPE_INTEGER &&
+ cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
+
+ /* Allocate a buffer for the CLS */
+ cls = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
+ (acpi_size) 7);
+ if (!cls) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ cls->string =
+ ACPI_ADD_PTR(char, cls, sizeof(struct acpi_pnp_device_id));
+
+ sprintf(cls->string, "%02x%02x%02x",
+ (u8)ACPI_TO_INTEGER(cls_objects[0]->integer.value),
+ (u8)ACPI_TO_INTEGER(cls_objects[1]->integer.value),
+ (u8)ACPI_TO_INTEGER(cls_objects[2]->integer.value));
+ cls->length = 7;
+ *return_id = cls;
+ }
+
+cleanup:
+
+ /* On exit, we must delete the return object */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
--
2.1.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* RE: [V7 PATCH 1/3] ACPICA: Add ACPI _CLS processing
2015-03-26 19:13 ` Suravee Suthikulpanit
(?)
@ 2015-03-27 17:51 ` Moore, Robert
2015-03-30 14:17 ` Suravee Suthikulanit
-1 siblings, 1 reply; 12+ messages in thread
From: Moore, Robert @ 2015-03-27 17:51 UTC (permalink / raw)
To: Suravee Suthikulpanit, rjw, mika.westerberg, Zheng, Lv, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi
+ cls_objects = obj_desc->package.elements;
+
+ if (obj_desc->common.type == ACPI_TYPE_PACKAGE &&
+ obj_desc->package.count == 3 &&
+ cls_objects[0]->common.type == ACPI_TYPE_INTEGER &&
+ cls_objects[1]->common.type == ACPI_TYPE_INTEGER &&
+ cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
+
+ /* Allocate a buffer for the CLS */
+ cls = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
+ (acpi_size) 7);
I would like to see an error returned if an object or subobject is of the incorrect type.
Then, the caller knows not to attempt to look at it.
> -----Original Message-----
> From: Suravee Suthikulpanit [mailto:Suravee.Suthikulpanit@amd.com]
> Sent: Thursday, March 26, 2015 12:13 PM
> To: rjw@rjwysocki.net; mika.westerberg@linux.intel.com; Moore, Robert;
> Zheng, Lv; hanjun.guo@linaro.org
> Cc: lenb@kernel.org; hdegoede@redhat.com; tj@kernel.org;
> mjg59@srcf.ucam.org; gregkh@linuxfoundation.org; al.stone@linaro.org;
> graeme.gregory@linaro.org; leo.duran@amd.com; linux-ide@vger.kernel.org;
> linux-acpi@vger.kernel.org; linux-kernel@vger.kernel.org; linaro-
> acpi@lists.linaro.org; Suravee Suthikulpanit
> Subject: [V7 PATCH 1/3] ACPICA: Add ACPI _CLS processing
>
> ACPI Device configuration often contain _CLS object to suppy PCI-defined
> class code for the device. This patch introduces logic to process the _CLS
> object.
>
> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
> ---
> drivers/acpi/acpica/acutils.h | 3 ++
> drivers/acpi/acpica/nsxfname.c | 21 +++++++++++--
> drivers/acpi/acpica/utids.c | 71
> ++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 93 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h
> index c2f03e8..2aef850 100644
> --- a/drivers/acpi/acpica/acutils.h
> +++ b/drivers/acpi/acpica/acutils.h
> @@ -430,6 +430,9 @@ acpi_status
> acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
> struct acpi_pnp_device_id_list ** return_cid_list);
>
> +acpi_status
> +acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
> + struct acpi_pnp_device_id **return_id);
> /*
> * utlock - reader/writer locks
> */
> diff --git a/drivers/acpi/acpica/nsxfname.c
> b/drivers/acpi/acpica/nsxfname.c index d66c326..590ef06 100644
> --- a/drivers/acpi/acpica/nsxfname.c
> +++ b/drivers/acpi/acpica/nsxfname.c
> @@ -276,11 +276,12 @@ acpi_get_object_info(acpi_handle handle,
> struct acpi_pnp_device_id *hid = NULL;
> struct acpi_pnp_device_id *uid = NULL;
> struct acpi_pnp_device_id *sub = NULL;
> + struct acpi_pnp_device_id *cls = NULL;
> char *next_id_string;
> acpi_object_type type;
> acpi_name name;
> u8 param_count = 0;
> - u8 valid = 0;
> + u16 valid = 0;
> u32 info_size;
> u32 i;
> acpi_status status;
> @@ -320,7 +321,7 @@ acpi_get_object_info(acpi_handle handle,
> if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
> /*
> * Get extra info for ACPI Device/Processor objects only:
> - * Run the Device _HID, _UID, _SUB, and _CID methods.
> + * Run the Device _HID, _UID, _SUB, _CID and _CLS methods.
> *
> * Note: none of these methods are required, so they may or
> may
> * not be present for this device. The Info->Valid bitfield is
> used @@ -351,6 +352,14 @@ acpi_get_object_info(acpi_handle handle,
> valid |= ACPI_VALID_SUB;
> }
>
> + /* Execute the Device._CLS method */
> +
> + status = acpi_ut_execute_CLS(node, &cls);
> + if (ACPI_SUCCESS(status)) {
> + info_size += cls->length;
> + valid |= ACPI_VALID_CLS;
> + }
> +
> /* Execute the Device._CID method */
>
> status = acpi_ut_execute_CID(node, &cid_list); @@ -468,6
> +477,11 @@ acpi_get_object_info(acpi_handle handle,
> sub, next_id_string);
> }
>
> + if (cls) {
> + next_id_string = acpi_ns_copy_device_id(&info->cls,
> + cls, next_id_string);
> + }
> +
> if (cid_list) {
> info->compatible_id_list.count = cid_list->count;
> info->compatible_id_list.list_size = cid_list->list_size; @@ -
> 507,6 +521,9 @@ cleanup:
> if (sub) {
> ACPI_FREE(sub);
> }
> + if (cls) {
> + ACPI_FREE(cls);
> + }
> if (cid_list) {
> ACPI_FREE(cid_list);
> }
> diff --git a/drivers/acpi/acpica/utids.c b/drivers/acpi/acpica/utids.c
> index 27431cf..a64b5d1 100644
> --- a/drivers/acpi/acpica/utids.c
> +++ b/drivers/acpi/acpica/utids.c
> @@ -416,3 +416,74 @@ cleanup:
> acpi_ut_remove_reference(obj_desc);
> return_ACPI_STATUS(status);
> }
> +
> +/**********************************************************************
> +*********
> + *
> + * FUNCTION: acpi_ut_execute_CLS
> + *
> + * PARAMETERS: device_node - Node for the device
> + * return_id - Where the string UID is returned
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Executes the _CLS control method that returns PCI-defined
> + * class code of the device. The ACPI spec define _CLS as a
> + * package with three integers. The returned string has
> format:
> + *
> + * "bbsspp"
> + * where:
> + * bb = Base-class code
> + * ss = Sub-class code
> + * pp = Programming Interface code
> + *
> +
> +***********************************************************************
> +*******/
> +
> +acpi_status
> +acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
> + struct acpi_pnp_device_id **return_id) {
> + struct acpi_pnp_device_id *cls;
> + union acpi_operand_object *obj_desc;
> + union acpi_operand_object **cls_objects;
> + acpi_status status;
> +
> + ACPI_FUNCTION_TRACE(ut_execute_CLS);
> + status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CLS,
> + ACPI_BTYPE_PACKAGE, &obj_desc);
> + if (ACPI_FAILURE(status))
> + return_ACPI_STATUS(status);
> +
> + cls_objects = obj_desc->package.elements;
> +
> + if (obj_desc->common.type == ACPI_TYPE_PACKAGE &&
> + obj_desc->package.count == 3 &&
> + cls_objects[0]->common.type == ACPI_TYPE_INTEGER &&
> + cls_objects[1]->common.type == ACPI_TYPE_INTEGER &&
> + cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
> +
> + /* Allocate a buffer for the CLS */
> + cls = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
> + (acpi_size) 7);
> + if (!cls) {
> + status = AE_NO_MEMORY;
> + goto cleanup;
> + }
> +
> + cls->string =
> + ACPI_ADD_PTR(char, cls, sizeof(struct
> acpi_pnp_device_id));
> +
> + sprintf(cls->string, "%02x%02x%02x",
> + (u8)ACPI_TO_INTEGER(cls_objects[0]->integer.value),
> + (u8)ACPI_TO_INTEGER(cls_objects[1]->integer.value),
> + (u8)ACPI_TO_INTEGER(cls_objects[2]->integer.value));
> + cls->length = 7;
> + *return_id = cls;
> + }
> +
> +cleanup:
> +
> + /* On exit, we must delete the return object */
> +
> + acpi_ut_remove_reference(obj_desc);
> + return_ACPI_STATUS(status);
> +}
> --
> 2.1.0
^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [V7 PATCH 1/3] ACPICA: Add ACPI _CLS processing
2015-03-27 17:51 ` Moore, Robert
@ 2015-03-30 14:17 ` Suravee Suthikulanit
2015-03-30 17:09 ` Moore, Robert
0 siblings, 1 reply; 12+ messages in thread
From: Suravee Suthikulanit @ 2015-03-30 14:17 UTC (permalink / raw)
To: Moore, Robert, rjw, mika.westerberg, Zheng, Lv, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi
On 3/27/2015 12:51 PM, Moore, Robert wrote:
> + cls_objects = obj_desc->package.elements;
> +
> + if (obj_desc->common.type == ACPI_TYPE_PACKAGE &&
> + obj_desc->package.count == 3 &&
> + cls_objects[0]->common.type == ACPI_TYPE_INTEGER &&
> + cls_objects[1]->common.type == ACPI_TYPE_INTEGER &&
> + cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
> +
> + /* Allocate a buffer for the CLS */
> + cls = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
> + (acpi_size) 7);
>
> I would like to see an error returned if an object or subobject is of the incorrect type.
> Then, the caller knows not to attempt to look at it.
>
Ok. I will return AE_TYPE if the condition is false here.
Thanks,
Suravee
^ permalink raw reply [flat|nested] 12+ messages in thread* RE: [V7 PATCH 1/3] ACPICA: Add ACPI _CLS processing
2015-03-30 14:17 ` Suravee Suthikulanit
@ 2015-03-30 17:09 ` Moore, Robert
0 siblings, 0 replies; 12+ messages in thread
From: Moore, Robert @ 2015-03-30 17:09 UTC (permalink / raw)
To: Suravee Suthikulanit, rjw, mika.westerberg, Zheng, Lv, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi
AE_AML_OPERAND_TYPE -- used to indicate an exception raised by a type issue related to the AML code. Used to differentiate between a programmer error (AE_TYPE).
> -----Original Message-----
> From: Suravee Suthikulanit [mailto:suravee.suthikulpanit@amd.com]
> Sent: Monday, March 30, 2015 7:17 AM
> To: Moore, Robert; rjw@rjwysocki.net; mika.westerberg@linux.intel.com;
> Zheng, Lv; hanjun.guo@linaro.org
> Cc: lenb@kernel.org; hdegoede@redhat.com; tj@kernel.org;
> mjg59@srcf.ucam.org; gregkh@linuxfoundation.org; al.stone@linaro.org;
> graeme.gregory@linaro.org; leo.duran@amd.com; linux-ide@vger.kernel.org;
> linux-acpi@vger.kernel.org; linux-kernel@vger.kernel.org; linaro-
> acpi@lists.linaro.org
> Subject: Re: [V7 PATCH 1/3] ACPICA: Add ACPI _CLS processing
>
> On 3/27/2015 12:51 PM, Moore, Robert wrote:
> > + cls_objects = obj_desc->package.elements;
> > +
> > + if (obj_desc->common.type == ACPI_TYPE_PACKAGE &&
> > + obj_desc->package.count == 3 &&
> > + cls_objects[0]->common.type == ACPI_TYPE_INTEGER &&
> > + cls_objects[1]->common.type == ACPI_TYPE_INTEGER &&
> > + cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
> > +
> > + /* Allocate a buffer for the CLS */
> > + cls = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
> > + (acpi_size) 7);
> >
> > I would like to see an error returned if an object or subobject is of
> the incorrect type.
> > Then, the caller knows not to attempt to look at it.
> >
>
> Ok. I will return AE_TYPE if the condition is false here.
>
> Thanks,
>
> Suravee
^ permalink raw reply [flat|nested] 12+ messages in thread
* [V7 PATCH 2/3] ACPI / scan: Add support for ACPI _CLS device matching
2015-03-26 19:13 ` Suravee Suthikulpanit
@ 2015-03-26 19:13 ` Suravee Suthikulpanit
-1 siblings, 0 replies; 12+ messages in thread
From: Suravee Suthikulpanit @ 2015-03-26 19:13 UTC (permalink / raw)
To: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi,
Suravee Suthikulpanit
Device drivers typically use ACPI _HIDs/_CIDs listed in struct device_driver
acpi_match_table to match devices. However, for generic drivers, we do not
want to list _HID for all supported devices. Also, certain classes of devices
do not have _CID (e.g. SATA, USB). Instead, we can leverage ACPI _CLS,
which specifies PCI-defined class code (i.e. base-class, subclass and
programming interface). This patch adds support for matching ACPI devices using
the _CLS method.
To support loadable module, current design uses _HID or _CID to match device's
modalias. With the new way of matching with _CLS this would requires modification
to the current ACPI modalias key to include _CLS. This patch appends PCI-defined
class-code to the existing ACPI modalias as following.
acpi:<HID>:<CID1>:<CID2>:..:<CIDn>:<bbsspp>:
E.g:
# cat /sys/devices/platform/AMDI0600:00/modalias
acpi:AMDI0600:010601:
where bb is th base-class code, ss is te sub-class code, and pp is the
programming interface code
Since there would not be _HID/_CID in the ACPI matching table of the driver,
this patch adds a field to acpi_device_id to specify the matching _CLS.
static const struct acpi_device_id ahci_acpi_match[] = {
{ ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
{},
};
In this case, the corresponded entry in modules.alias file would be:
alias acpi*:010601:* ahci_platform
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/acpi/scan.c | 36 ++++++++++++++++++++++++++++++++----
include/acpi/acnames.h | 1 +
include/acpi/actypes.h | 4 +++-
include/linux/acpi.h | 13 +++++++++++++
include/linux/mod_devicetable.h | 2 ++
scripts/mod/devicetable-offsets.c | 2 ++
scripts/mod/file2alias.c | 32 ++++++++++++++++++++++++++++++--
7 files changed, 83 insertions(+), 7 deletions(-)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 52a62aa..3320ee2 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -895,6 +895,29 @@ static void acpi_device_remove_files(struct acpi_device *dev)
ACPI Bus operations
-------------------------------------------------------------------------- */
+static bool __acpi_match_device_cls(const struct acpi_device_id *id,
+ struct acpi_hardware_id *hwid)
+{
+ int i, msk, byte_shift;
+ char buf[3];
+
+ if (!id->cls)
+ return false;
+
+ /* Apply class-code bitmask, before checking each class-code byte */
+ for (i = 1; i <= 3; i++) {
+ byte_shift = 8 * (3 - i);
+ msk = (id->cls_msk >> byte_shift) & 0xFF;
+ if (!msk)
+ continue;
+
+ sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
+ if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
+ return false;
+ }
+ return true;
+}
+
static const struct acpi_device_id *__acpi_match_device(
struct acpi_device *device, const struct acpi_device_id *ids)
{
@@ -908,11 +931,14 @@ static const struct acpi_device_id *__acpi_match_device(
if (!device->status.present)
return NULL;
- for (id = ids; id->id[0]; id++)
- list_for_each_entry(hwid, &device->pnp.ids, list)
- if (!strcmp((char *) id->id, hwid->id))
+ for (id = ids; id->id[0] || id->cls; id++) {
+ list_for_each_entry(hwid, &device->pnp.ids, list) {
+ if (id->id[0] && !strcmp((char *) id->id, hwid->id))
return id;
-
+ else if (__acpi_match_device_cls(id, hwid))
+ return id;
+ }
+ }
return NULL;
}
@@ -2005,6 +2031,8 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
if (info->valid & ACPI_VALID_UID)
pnp->unique_id = kstrdup(info->unique_id.string,
GFP_KERNEL);
+ if (info->valid & ACPI_VALID_CLS)
+ acpi_add_id(pnp, info->cls.string);
kfree(info);
diff --git a/include/acpi/acnames.h b/include/acpi/acnames.h
index 273de70..b52c0dc 100644
--- a/include/acpi/acnames.h
+++ b/include/acpi/acnames.h
@@ -51,6 +51,7 @@
#define METHOD_NAME__BBN "_BBN"
#define METHOD_NAME__CBA "_CBA"
#define METHOD_NAME__CID "_CID"
+#define METHOD_NAME__CLS "_CLS"
#define METHOD_NAME__CRS "_CRS"
#define METHOD_NAME__DDN "_DDN"
#define METHOD_NAME__HID "_HID"
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index b034f10..ab3dac8 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -1148,7 +1148,7 @@ struct acpi_device_info {
u32 name; /* ACPI object Name */
acpi_object_type type; /* ACPI object Type */
u8 param_count; /* If a method, required parameter count */
- u8 valid; /* Indicates which optional fields are valid */
+ u16 valid; /* Indicates which optional fields are valid */
u8 flags; /* Miscellaneous info */
u8 highest_dstates[4]; /* _sx_d values: 0xFF indicates not valid */
u8 lowest_dstates[5]; /* _sx_w values: 0xFF indicates not valid */
@@ -1157,6 +1157,7 @@ struct acpi_device_info {
struct acpi_pnp_device_id hardware_id; /* _HID value */
struct acpi_pnp_device_id unique_id; /* _UID value */
struct acpi_pnp_device_id subsystem_id; /* _SUB value */
+ struct acpi_pnp_device_id cls; /* _CLS value */
struct acpi_pnp_device_id_list compatible_id_list; /* _CID list <must be last> */
};
@@ -1174,6 +1175,7 @@ struct acpi_device_info {
#define ACPI_VALID_CID 0x20
#define ACPI_VALID_SXDS 0x40
#define ACPI_VALID_SXWS 0x80
+#define ACPI_VALID_CLS 0x100
/* Flags for _STA return value (current_status above) */
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index de4e86f..e4fdce5 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -57,6 +57,19 @@ static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
#define ACPI_COMPANION_SET(dev, adev) ACPI_COMPANION(dev) = (adev)
#define ACPI_HANDLE(dev) acpi_device_handle(ACPI_COMPANION(dev))
+/**
+ * ACPI_DEVICE_CLASS - macro used to describe an ACPI device with
+ * the PCI-defined class-code information
+ *
+ * @_cls : the class, subclass, prog-if triple for this device
+ * @_msk : the class mask for this device
+ *
+ * This macro is used to create a struct acpi_device_id that matches a
+ * specific PCI class. The .id and .driver_data fields will be left
+ * initialized with the default value.
+ */
+#define ACPI_DEVICE_CLASS(_cls, _msk) .cls = (_cls), .cls_msk = (_msk),
+
static inline void acpi_preset_companion(struct device *dev,
struct acpi_device *parent, u64 addr)
{
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index e530533..2ed31b8 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -189,6 +189,8 @@ struct css_device_id {
struct acpi_device_id {
__u8 id[ACPI_ID_LEN];
kernel_ulong_t driver_data;
+ __u32 cls;
+ __u32 cls_msk;
};
#define PNP_ID_LEN 8
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index f282516..8987160 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -63,6 +63,8 @@ int main(void)
DEVID(acpi_device_id);
DEVID_FIELD(acpi_device_id, id);
+ DEVID_FIELD(acpi_device_id, cls);
+ DEVID_FIELD(acpi_device_id, cls_msk);
DEVID(pnp_device_id);
DEVID_FIELD(pnp_device_id, id);
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index e614ef6..704d597 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -511,12 +511,40 @@ static int do_serio_entry(const char *filename,
}
ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
-/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
+/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
+ * "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
+ *
+ * NOTE: Each driver should use one of the following : _HID, _CIDs
+ * or _CLS. Also, bb, ss, and pp can be substituted with ??
+ * as don't care byte.
+ */
static int do_acpi_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD_ADDR(symval, acpi_device_id, id);
- sprintf(alias, "acpi*:%s:*", *id);
+ DEF_FIELD_ADDR(symval, acpi_device_id, cls);
+ DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
+
+ if (id && strlen((const char *)*id))
+ sprintf(alias, "acpi*:%s:*", *id);
+ else if (cls) {
+ int i, byte_shift, cnt = 0;
+ unsigned int msk;
+
+ sprintf(&alias[cnt], "acpi*:");
+ cnt = 6;
+ for (i = 1; i <= 3; i++) {
+ byte_shift = 8 * (3-i);
+ msk = (*cls_msk >> byte_shift) & 0xFF;
+ if (msk)
+ sprintf(&alias[cnt], "%02x",
+ (*cls >> byte_shift) & 0xFF);
+ else
+ sprintf(&alias[cnt], "??");
+ cnt += 2;
+ }
+ sprintf(&alias[cnt], ":*");
+ }
return 1;
}
ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
--
2.1.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* [V7 PATCH 2/3] ACPI / scan: Add support for ACPI _CLS device matching
@ 2015-03-26 19:13 ` Suravee Suthikulpanit
0 siblings, 0 replies; 12+ messages in thread
From: Suravee Suthikulpanit @ 2015-03-26 19:13 UTC (permalink / raw)
To: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi,
Suravee Suthikulpanit
Device drivers typically use ACPI _HIDs/_CIDs listed in struct device_driver
acpi_match_table to match devices. However, for generic drivers, we do not
want to list _HID for all supported devices. Also, certain classes of devices
do not have _CID (e.g. SATA, USB). Instead, we can leverage ACPI _CLS,
which specifies PCI-defined class code (i.e. base-class, subclass and
programming interface). This patch adds support for matching ACPI devices using
the _CLS method.
To support loadable module, current design uses _HID or _CID to match device's
modalias. With the new way of matching with _CLS this would requires modification
to the current ACPI modalias key to include _CLS. This patch appends PCI-defined
class-code to the existing ACPI modalias as following.
acpi:<HID>:<CID1>:<CID2>:..:<CIDn>:<bbsspp>:
E.g:
# cat /sys/devices/platform/AMDI0600:00/modalias
acpi:AMDI0600:010601:
where bb is th base-class code, ss is te sub-class code, and pp is the
programming interface code
Since there would not be _HID/_CID in the ACPI matching table of the driver,
this patch adds a field to acpi_device_id to specify the matching _CLS.
static const struct acpi_device_id ahci_acpi_match[] = {
{ ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
{},
};
In this case, the corresponded entry in modules.alias file would be:
alias acpi*:010601:* ahci_platform
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/acpi/scan.c | 36 ++++++++++++++++++++++++++++++++----
include/acpi/acnames.h | 1 +
include/acpi/actypes.h | 4 +++-
include/linux/acpi.h | 13 +++++++++++++
include/linux/mod_devicetable.h | 2 ++
scripts/mod/devicetable-offsets.c | 2 ++
scripts/mod/file2alias.c | 32 ++++++++++++++++++++++++++++++--
7 files changed, 83 insertions(+), 7 deletions(-)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 52a62aa..3320ee2 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -895,6 +895,29 @@ static void acpi_device_remove_files(struct acpi_device *dev)
ACPI Bus operations
-------------------------------------------------------------------------- */
+static bool __acpi_match_device_cls(const struct acpi_device_id *id,
+ struct acpi_hardware_id *hwid)
+{
+ int i, msk, byte_shift;
+ char buf[3];
+
+ if (!id->cls)
+ return false;
+
+ /* Apply class-code bitmask, before checking each class-code byte */
+ for (i = 1; i <= 3; i++) {
+ byte_shift = 8 * (3 - i);
+ msk = (id->cls_msk >> byte_shift) & 0xFF;
+ if (!msk)
+ continue;
+
+ sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
+ if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
+ return false;
+ }
+ return true;
+}
+
static const struct acpi_device_id *__acpi_match_device(
struct acpi_device *device, const struct acpi_device_id *ids)
{
@@ -908,11 +931,14 @@ static const struct acpi_device_id *__acpi_match_device(
if (!device->status.present)
return NULL;
- for (id = ids; id->id[0]; id++)
- list_for_each_entry(hwid, &device->pnp.ids, list)
- if (!strcmp((char *) id->id, hwid->id))
+ for (id = ids; id->id[0] || id->cls; id++) {
+ list_for_each_entry(hwid, &device->pnp.ids, list) {
+ if (id->id[0] && !strcmp((char *) id->id, hwid->id))
return id;
-
+ else if (__acpi_match_device_cls(id, hwid))
+ return id;
+ }
+ }
return NULL;
}
@@ -2005,6 +2031,8 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
if (info->valid & ACPI_VALID_UID)
pnp->unique_id = kstrdup(info->unique_id.string,
GFP_KERNEL);
+ if (info->valid & ACPI_VALID_CLS)
+ acpi_add_id(pnp, info->cls.string);
kfree(info);
diff --git a/include/acpi/acnames.h b/include/acpi/acnames.h
index 273de70..b52c0dc 100644
--- a/include/acpi/acnames.h
+++ b/include/acpi/acnames.h
@@ -51,6 +51,7 @@
#define METHOD_NAME__BBN "_BBN"
#define METHOD_NAME__CBA "_CBA"
#define METHOD_NAME__CID "_CID"
+#define METHOD_NAME__CLS "_CLS"
#define METHOD_NAME__CRS "_CRS"
#define METHOD_NAME__DDN "_DDN"
#define METHOD_NAME__HID "_HID"
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index b034f10..ab3dac8 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -1148,7 +1148,7 @@ struct acpi_device_info {
u32 name; /* ACPI object Name */
acpi_object_type type; /* ACPI object Type */
u8 param_count; /* If a method, required parameter count */
- u8 valid; /* Indicates which optional fields are valid */
+ u16 valid; /* Indicates which optional fields are valid */
u8 flags; /* Miscellaneous info */
u8 highest_dstates[4]; /* _sx_d values: 0xFF indicates not valid */
u8 lowest_dstates[5]; /* _sx_w values: 0xFF indicates not valid */
@@ -1157,6 +1157,7 @@ struct acpi_device_info {
struct acpi_pnp_device_id hardware_id; /* _HID value */
struct acpi_pnp_device_id unique_id; /* _UID value */
struct acpi_pnp_device_id subsystem_id; /* _SUB value */
+ struct acpi_pnp_device_id cls; /* _CLS value */
struct acpi_pnp_device_id_list compatible_id_list; /* _CID list <must be last> */
};
@@ -1174,6 +1175,7 @@ struct acpi_device_info {
#define ACPI_VALID_CID 0x20
#define ACPI_VALID_SXDS 0x40
#define ACPI_VALID_SXWS 0x80
+#define ACPI_VALID_CLS 0x100
/* Flags for _STA return value (current_status above) */
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index de4e86f..e4fdce5 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -57,6 +57,19 @@ static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
#define ACPI_COMPANION_SET(dev, adev) ACPI_COMPANION(dev) = (adev)
#define ACPI_HANDLE(dev) acpi_device_handle(ACPI_COMPANION(dev))
+/**
+ * ACPI_DEVICE_CLASS - macro used to describe an ACPI device with
+ * the PCI-defined class-code information
+ *
+ * @_cls : the class, subclass, prog-if triple for this device
+ * @_msk : the class mask for this device
+ *
+ * This macro is used to create a struct acpi_device_id that matches a
+ * specific PCI class. The .id and .driver_data fields will be left
+ * initialized with the default value.
+ */
+#define ACPI_DEVICE_CLASS(_cls, _msk) .cls = (_cls), .cls_msk = (_msk),
+
static inline void acpi_preset_companion(struct device *dev,
struct acpi_device *parent, u64 addr)
{
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index e530533..2ed31b8 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -189,6 +189,8 @@ struct css_device_id {
struct acpi_device_id {
__u8 id[ACPI_ID_LEN];
kernel_ulong_t driver_data;
+ __u32 cls;
+ __u32 cls_msk;
};
#define PNP_ID_LEN 8
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index f282516..8987160 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -63,6 +63,8 @@ int main(void)
DEVID(acpi_device_id);
DEVID_FIELD(acpi_device_id, id);
+ DEVID_FIELD(acpi_device_id, cls);
+ DEVID_FIELD(acpi_device_id, cls_msk);
DEVID(pnp_device_id);
DEVID_FIELD(pnp_device_id, id);
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index e614ef6..704d597 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -511,12 +511,40 @@ static int do_serio_entry(const char *filename,
}
ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
-/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
+/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
+ * "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
+ *
+ * NOTE: Each driver should use one of the following : _HID, _CIDs
+ * or _CLS. Also, bb, ss, and pp can be substituted with ??
+ * as don't care byte.
+ */
static int do_acpi_entry(const char *filename,
void *symval, char *alias)
{
DEF_FIELD_ADDR(symval, acpi_device_id, id);
- sprintf(alias, "acpi*:%s:*", *id);
+ DEF_FIELD_ADDR(symval, acpi_device_id, cls);
+ DEF_FIELD_ADDR(symval, acpi_device_id, cls_msk);
+
+ if (id && strlen((const char *)*id))
+ sprintf(alias, "acpi*:%s:*", *id);
+ else if (cls) {
+ int i, byte_shift, cnt = 0;
+ unsigned int msk;
+
+ sprintf(&alias[cnt], "acpi*:");
+ cnt = 6;
+ for (i = 1; i <= 3; i++) {
+ byte_shift = 8 * (3-i);
+ msk = (*cls_msk >> byte_shift) & 0xFF;
+ if (msk)
+ sprintf(&alias[cnt], "%02x",
+ (*cls >> byte_shift) & 0xFF);
+ else
+ sprintf(&alias[cnt], "??");
+ cnt += 2;
+ }
+ sprintf(&alias[cnt], ":*");
+ }
return 1;
}
ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
--
2.1.0
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [V7 PATCH 3/3] ata: ahci_platform: Add ACPI _CLS matching
2015-03-26 19:13 ` Suravee Suthikulpanit
@ 2015-03-26 19:13 ` Suravee Suthikulpanit
-1 siblings, 0 replies; 12+ messages in thread
From: Suravee Suthikulpanit @ 2015-03-26 19:13 UTC (permalink / raw)
To: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi,
Suravee Suthikulpanit
This patch adds ACPI supports for AHCI platform driver, which uses _CLS
method to match the device.
The following is an example of ASL structure in DSDT for a SATA controller,
which contains _CLS package to be matched by the ahci_platform driver:
Device (AHC0) // AHCI Controller
{
Name(_HID, "AMDI0600")
Name (_CCA, 1)
Name (_CLS, Package (3)
{
0x01, // Base Class: Mass Storage
0x06, // Sub-Class: serial ATA
0x01, // Interface: AHCI
})
Name (_CRS, ResourceTemplate ()
{
Memory32Fixed (ReadWrite, 0xE0300000, 0x00010000)
Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive,,,) { 387 }
})
}
Also, since ATA driver should not require PCI support for ATA_ACPI,
this patch removes dependency in the driver/ata/Kconfig.
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/ata/Kconfig | 2 +-
drivers/ata/ahci_platform.c | 9 +++++++++
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 5f60155..50305e3 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -48,7 +48,7 @@ config ATA_VERBOSE_ERROR
config ATA_ACPI
bool "ATA ACPI Support"
- depends on ACPI && PCI
+ depends on ACPI
default y
help
This option adds support for ATA-related ACPI objects.
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 78d6ae0..04975b8 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -20,6 +20,8 @@
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
+#include <linux/acpi.h>
+#include <linux/pci_ids.h>
#include "ahci.h"
#define DRV_NAME "ahci"
@@ -78,12 +80,19 @@ static const struct of_device_id ahci_of_match[] = {
};
MODULE_DEVICE_TABLE(of, ahci_of_match);
+static const struct acpi_device_id ahci_acpi_match[] = {
+ { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
+
static struct platform_driver ahci_driver = {
.probe = ahci_probe,
.remove = ata_platform_remove_one,
.driver = {
.name = DRV_NAME,
.of_match_table = ahci_of_match,
+ .acpi_match_table = ahci_acpi_match,
.pm = &ahci_pm_ops,
},
};
--
2.1.0
^ permalink raw reply related [flat|nested] 12+ messages in thread* [V7 PATCH 3/3] ata: ahci_platform: Add ACPI _CLS matching
@ 2015-03-26 19:13 ` Suravee Suthikulpanit
0 siblings, 0 replies; 12+ messages in thread
From: Suravee Suthikulpanit @ 2015-03-26 19:13 UTC (permalink / raw)
To: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo
Cc: lenb, hdegoede, tj, mjg59, gregkh, al.stone, graeme.gregory,
leo.duran, linux-ide, linux-acpi, linux-kernel, linaro-acpi,
Suravee Suthikulpanit
This patch adds ACPI supports for AHCI platform driver, which uses _CLS
method to match the device.
The following is an example of ASL structure in DSDT for a SATA controller,
which contains _CLS package to be matched by the ahci_platform driver:
Device (AHC0) // AHCI Controller
{
Name(_HID, "AMDI0600")
Name (_CCA, 1)
Name (_CLS, Package (3)
{
0x01, // Base Class: Mass Storage
0x06, // Sub-Class: serial ATA
0x01, // Interface: AHCI
})
Name (_CRS, ResourceTemplate ()
{
Memory32Fixed (ReadWrite, 0xE0300000, 0x00010000)
Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive,,,) { 387 }
})
}
Also, since ATA driver should not require PCI support for ATA_ACPI,
this patch removes dependency in the driver/ata/Kconfig.
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/ata/Kconfig | 2 +-
drivers/ata/ahci_platform.c | 9 +++++++++
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 5f60155..50305e3 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -48,7 +48,7 @@ config ATA_VERBOSE_ERROR
config ATA_ACPI
bool "ATA ACPI Support"
- depends on ACPI && PCI
+ depends on ACPI
default y
help
This option adds support for ATA-related ACPI objects.
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 78d6ae0..04975b8 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -20,6 +20,8 @@
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
+#include <linux/acpi.h>
+#include <linux/pci_ids.h>
#include "ahci.h"
#define DRV_NAME "ahci"
@@ -78,12 +80,19 @@ static const struct of_device_id ahci_of_match[] = {
};
MODULE_DEVICE_TABLE(of, ahci_of_match);
+static const struct acpi_device_id ahci_acpi_match[] = {
+ { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
+
static struct platform_driver ahci_driver = {
.probe = ahci_probe,
.remove = ata_platform_remove_one,
.driver = {
.name = DRV_NAME,
.of_match_table = ahci_of_match,
+ .acpi_match_table = ahci_acpi_match,
.pm = &ahci_pm_ops,
},
};
--
2.1.0
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [V7 PATCH 0/3] Introduce ACPI support for ahci_platform driver
2015-03-26 19:13 ` Suravee Suthikulpanit
` (3 preceding siblings ...)
(?)
@ 2015-03-26 19:57 ` Mark Salter
-1 siblings, 0 replies; 12+ messages in thread
From: Mark Salter @ 2015-03-26 19:57 UTC (permalink / raw)
To: Suravee Suthikulpanit
Cc: rjw, mika.westerberg, robert.moore, lv.zheng, hanjun.guo, mjg59,
graeme.gregory, al.stone, linux-ide, gregkh, linaro-acpi,
linux-acpi, linux-kernel, hdegoede, tj, lenb
On Thu, 2015-03-26 at 14:13 -0500, Suravee Suthikulpanit wrote:
> This patch series introduce ACPI support for AHCI platform driver.
> Existing ACPI support for AHCI assumes the device controller is a PCI device.
> Since there is no ACPI _CID for generic AHCI controller, the driver
> could not use it for matching devices. Therefore, this patch introduces
> a mechanism for drivers to match devices using ACPI _CLS method.
> _CLS contains PCI-defined class-code.
>
> This patch series also modifies ACPI modalias to add class-code to the
> exisiting format, which currently only uses _HID and _CIDs. This is required
> to support loadable modules w/ _CLS.
>
> This is rebased from and tested with:
>
> http://git.linaro.org/leg/acpi/acpi.git acpi-5.1-v11
>
> This topic was discussed earlier here (as part of introducing support for
> AMD Seattle SATA controller):
>
> http://marc.info/?l=linux-arm-kernel&m=141083492521584&w=2
>
> Changes from V6 (https://lkml.org/lkml/2015/3/25/797)
> * Adding Acked-by Mika, and Reviewed-by Hanjun
> * Minor clen up to use lower case 0xffffff for cls_msk
> (per Mika suggestions).
> * Modify the ACPI_DEVICE_CLASS macro to use designated initializer
> (per Mika suggestions).
>
> Changes from V5 (https://lkml.org/lkml/2015/3/6/24)
> * Rebased and tested with acpi-5.1-v11
> * Splitting up the ACPICA changes into a separate patch [1/3].
> (per Mika suggestion)
> * Adding class-code mask support (per Mika suggestion)
> * Use macro to define struct acpi_device_id entry (per Mika suggestion)
> * Note: Mika also recommend reordering the member of struct acpi_device_id
> and define a macro to be used for declaring each table entry. This is a
> large amount of changes, and will be done separtely from this patch series.
>
> Changes from V4 (https://lkml.org/lkml/2015/3/2/56)
> * [1/2] Bug fixed: Reorder the declaration of
> struct acpi_pnp_device_id cls in the struct acpi_device_info
> (include/acpi/actypes.h) since compatible_id_list must be last one.
> * [2/2] Added Acked-by: Tejun Heo <tj@kernel.org>
>
> Changes from V3 (https://lkml.org/lkml/2015/2/8/106)
> * Instead of introducing new structure acpi_device_cls, add cls into
> the acpi_device_id, and modify the __acpi_match_device
> to also match for cls. (per Mika suggestion.)
> * Add loadable module support, which requires changes in ACPI
> modalias. (per Mika suggestion.)
> * Rebased and tested with acpi-5.1-v9
>
> Changes from V2 (https://lkml.org/lkml/2015/1/5/662)
> * Update with review comment from Rafael in patch 1/2
> * Rebased and tested with acpi-5.1-v8
>
> Changes from V1 (https://lkml.org/lkml/2014/12/19/345)
> * Rebased to 3.19.0-rc2
> * Change from acpi_cls in device_driver to acpi_match_cls (Hanjun comment)
> * Change the matching logic in acpi_driver_match_device() due to the new
> special PRP0001 _HID.
> * Simplify the return type of acpi_match_device_cls() to boolean.
>
> Changes from RFC (https://lkml.org/lkml/2014/12/17/446)
> * Remove #ifdef and make non-ACPI version of the acpi_match_device_cls
> as inline. (per Arnd)
> * Simplify logic to retrieve and evaluate _CLS handle. (per Hanjun)
>
> Suravee Suthikulpanit (3):
> ACPICA: Add ACPI _CLS processing
> ACPI / scan: Add support for ACPI _CLS device matching
> ata: ahci_platform: Add ACPI _CLS matching
>
> drivers/acpi/acpica/acutils.h | 3 ++
> drivers/acpi/acpica/nsxfname.c | 21 ++++++++++--
> drivers/acpi/acpica/utids.c | 71 +++++++++++++++++++++++++++++++++++++++
> drivers/acpi/scan.c | 36 +++++++++++++++++---
> drivers/ata/Kconfig | 2 +-
> drivers/ata/ahci_platform.c | 9 +++++
> include/acpi/acnames.h | 1 +
> include/acpi/actypes.h | 4 ++-
> include/linux/acpi.h | 13 +++++++
> include/linux/mod_devicetable.h | 2 ++
> scripts/mod/devicetable-offsets.c | 2 ++
> scripts/mod/file2alias.c | 32 ++++++++++++++++--
> 12 files changed, 186 insertions(+), 10 deletions(-)
>
FWIW,
Tested-by: Mark Salter <msalter@redhat.com>
^ permalink raw reply [flat|nested] 12+ messages in thread