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From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
	<linux-acpi@vger.kernel.org>, <iommu@lists.linux-foundation.org>,
	<devel@acpica.org>
Cc: <linuxarm@huawei.com>, <lorenzo.pieralisi@arm.com>,
	<joro@8bytes.org>, <robin.murphy@arm.com>,
	<wanghuiqiang@huawei.com>, <guohanjun@huawei.com>,
	<jonathan.cameron@huawei.com>
Subject: [RFC PATCH 1/4] ACPICA: IORT: Update for revision E
Date: Tue, 27 Oct 2020 11:26:43 +0000
Message-ID: <20201027112646.44680-2-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20201027112646.44680-1-shameerali.kolothum.thodi@huawei.com>

IORT revision E contains a few additions like,
    -Added an identifier field in the node descriptors to aid table
     cross-referencing.
    -Introduced the Reserved Memory Range(RMR) node. This is used
     to describe memory ranges that are used by endpoints and requires
     a unity mapping in SMMU.
    -Introduced a flag in the RC node to express support for PRI.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 -This should be updated through acpica git. I have sent out a pull
  request for the same here,
  https://github.com/acpica/acpica/pull/638

Please help to review.
---
 include/acpi/actbl2.h | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index ec66779cb193..274fce7b5c01 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -68,7 +68,7 @@
  * IORT - IO Remapping Table
  *
  * Conforms to "IO Remapping Table System Software on ARM Platforms",
- * Document number: ARM DEN 0049D, March 2018
+ * Document number: ARM DEN 0049E, June 2020
  *
  ******************************************************************************/
 
@@ -86,7 +86,8 @@ struct acpi_iort_node {
 	u8 type;
 	u16 length;
 	u8 revision;
-	u32 reserved;
+	u16 reserved;
+	u16 identifier;
 	u32 mapping_count;
 	u32 mapping_offset;
 	char node_data[1];
@@ -100,7 +101,8 @@ enum acpi_iort_node_type {
 	ACPI_IORT_NODE_PCI_ROOT_COMPLEX = 0x02,
 	ACPI_IORT_NODE_SMMU = 0x03,
 	ACPI_IORT_NODE_SMMU_V3 = 0x04,
-	ACPI_IORT_NODE_PMCG = 0x05
+	ACPI_IORT_NODE_PMCG = 0x05,
+	ACPI_IORT_NODE_RMR = 0x06,
 };
 
 struct acpi_iort_id_mapping {
@@ -167,10 +169,10 @@ struct acpi_iort_root_complex {
 	u8 reserved[3];		/* Reserved, must be zero */
 };
 
-/* Values for ats_attribute field above */
+/* Masks for ats_attribute field above */
 
-#define ACPI_IORT_ATS_SUPPORTED         0x00000001	/* The root complex supports ATS */
-#define ACPI_IORT_ATS_UNSUPPORTED       0x00000000	/* The root complex doesn't support ATS */
+#define ACPI_IORT_ATS_SUPPORTED         (1)	/* The root complex supports ATS */
+#define ACPI_IORT_PRI_SUPPORTED         (1<<1)	/* The root complex supports PRI */
 
 struct acpi_iort_smmu {
 	u64 base_address;	/* SMMU base address */
@@ -241,6 +243,17 @@ struct acpi_iort_pmcg {
 	u64 page1_base_address;
 };
 
+struct acpi_iort_rmr {
+	u32 rmr_count;
+	u32 rmr_offset;
+};
+
+struct acpi_iort_rmr_desc {
+	u64 base_address;
+	u64 length;
+	u32 reserved;
+};
+
 /*******************************************************************************
  *
  * IVRS - I/O Virtualization Reporting Structure
-- 
2.17.1


  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-27 11:26 [RFC PATCH 0/4] ACPI/IORT: Support for IORT RMR node Shameer Kolothum
2020-10-27 11:26 ` Shameer Kolothum [this message]
     [not found]   ` <BYAPR11MB3256AFF743B4FCC400F4181C87160@BYAPR11MB3256.namprd11.prod.outlook.com>
     [not found]     ` <610c14ef56d64fe087ca52aede07d811@huawei.com>
     [not found]       ` <MWHPR11MB1599988D7C857E3AFFA4A48AF0170@MWHPR11MB1599.namprd11.prod.outlook.com>
2020-10-28 18:40         ` [Devel] [RFC PATCH 1/4] ACPICA: IORT: Update for revision E Shameerali Kolothum Thodi
2020-10-27 11:26 ` [RFC PATCH 2/4] ACPI/IORT: Add support for RMR node parsing Shameer Kolothum
2020-10-28 18:43   ` [Devel] " David E. Box
2020-11-09 12:29     ` [Devel] " Sami Mujawar
2020-11-19 12:07       ` Shameerali Kolothum Thodi
2020-10-27 11:26 ` [RFC PATCH 3/4] ACPI/IORT: Add RMR memory regions reservation helper Shameer Kolothum
2020-11-05 18:03   ` Robin Murphy
2020-11-06  8:30     ` Shameerali Kolothum Thodi
2020-11-06 13:06       ` Robin Murphy
2020-11-06 16:00         ` Shameerali Kolothum Thodi
2020-10-27 11:26 ` [RFC PATCH 4/4] iommu/dma: Reserve any RMR regions associated with a dev Shameer Kolothum
2020-10-28 16:43 ` [RFC PATCH 0/4] ACPI/IORT: Support for IORT RMR node Steven Price
2020-10-28 18:24   ` Shameerali Kolothum Thodi
2020-11-06 15:22     ` Steven Price
2020-11-06 16:17       ` Shameerali Kolothum Thodi
2020-11-06 16:26         ` Steven Price
2020-11-06 17:09           ` Robin Murphy

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