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-rw-r--r--drivers/acpi/Kconfig2
-rw-r--r--drivers/acpi/arm64/Kconfig3
-rw-r--r--drivers/acpi/arm64/Makefile1
-rw-r--r--drivers/acpi/arm64/apmt.c178
-rw-r--r--drivers/acpi/arm64/iort.c16
-rw-r--r--drivers/acpi/bus.c2
6 files changed, 197 insertions, 5 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 473241b5193f..1cc11d2a2a88 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -90,7 +90,7 @@ config ACPI_SPCR_TABLE
config ACPI_FPDT
bool "ACPI Firmware Performance Data Table (FPDT) support"
- depends on X86_64
+ depends on X86_64 || ARM64
help
Enable support for the Firmware Performance Data Table (FPDT).
This table provides information on the timing of the system
diff --git a/drivers/acpi/arm64/Kconfig b/drivers/acpi/arm64/Kconfig
index d4a72835f328..b3ed6212244c 100644
--- a/drivers/acpi/arm64/Kconfig
+++ b/drivers/acpi/arm64/Kconfig
@@ -18,3 +18,6 @@ config ACPI_AGDI
reset command.
If set, the kernel parses AGDI table and listens for the command.
+
+config ACPI_APMT
+ bool
diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile
index 7b9e4045659d..e21a9e84e394 100644
--- a/drivers/acpi/arm64/Makefile
+++ b/drivers/acpi/arm64/Makefile
@@ -2,4 +2,5 @@
obj-$(CONFIG_ACPI_AGDI) += agdi.o
obj-$(CONFIG_ACPI_IORT) += iort.o
obj-$(CONFIG_ACPI_GTDT) += gtdt.o
+obj-$(CONFIG_ACPI_APMT) += apmt.o
obj-y += dma.o
diff --git a/drivers/acpi/arm64/apmt.c b/drivers/acpi/arm64/apmt.c
new file mode 100644
index 000000000000..8cab69fa5d59
--- /dev/null
+++ b/drivers/acpi/arm64/apmt.c
@@ -0,0 +1,178 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ARM APMT table support.
+ * Design document number: ARM DEN0117.
+ *
+ * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES.
+ *
+ */
+
+#define pr_fmt(fmt) "ACPI: APMT: " fmt
+
+#include <linux/acpi.h>
+#include <linux/acpi_apmt.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#define DEV_NAME "arm-cs-arch-pmu"
+
+/* There can be up to 3 resources: page 0 and 1 address, and interrupt. */
+#define DEV_MAX_RESOURCE_COUNT 3
+
+/* Root pointer to the mapped APMT table */
+static struct acpi_table_header *apmt_table;
+
+static int __init apmt_init_resources(struct resource *res,
+ struct acpi_apmt_node *node)
+{
+ int irq, trigger;
+ int num_res = 0;
+
+ res[num_res].start = node->base_address0;
+ res[num_res].end = node->base_address0 + SZ_4K - 1;
+ res[num_res].flags = IORESOURCE_MEM;
+
+ num_res++;
+
+ res[num_res].start = node->base_address1;
+ res[num_res].end = node->base_address1 + SZ_4K - 1;
+ res[num_res].flags = IORESOURCE_MEM;
+
+ num_res++;
+
+ if (node->ovflw_irq != 0) {
+ trigger = (node->ovflw_irq_flags & ACPI_APMT_OVFLW_IRQ_FLAGS_MODE);
+ trigger = (trigger == ACPI_APMT_OVFLW_IRQ_FLAGS_MODE_LEVEL) ?
+ ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
+ irq = acpi_register_gsi(NULL, node->ovflw_irq, trigger,
+ ACPI_ACTIVE_HIGH);
+
+ if (irq <= 0) {
+ pr_warn("APMT could not register gsi hwirq %d\n", irq);
+ return num_res;
+ }
+
+ res[num_res].start = irq;
+ res[num_res].end = irq;
+ res[num_res].flags = IORESOURCE_IRQ;
+
+ num_res++;
+ }
+
+ return num_res;
+}
+
+/**
+ * apmt_add_platform_device() - Allocate a platform device for APMT node
+ * @node: Pointer to device ACPI APMT node
+ * @fwnode: fwnode associated with the APMT node
+ *
+ * Returns: 0 on success, <0 failure
+ */
+static int __init apmt_add_platform_device(struct acpi_apmt_node *node,
+ struct fwnode_handle *fwnode)
+{
+ struct platform_device *pdev;
+ int ret, count;
+ struct resource res[DEV_MAX_RESOURCE_COUNT];
+
+ pdev = platform_device_alloc(DEV_NAME, PLATFORM_DEVID_AUTO);
+ if (!pdev)
+ return -ENOMEM;
+
+ memset(res, 0, sizeof(res));
+
+ count = apmt_init_resources(res, node);
+
+ ret = platform_device_add_resources(pdev, res, count);
+ if (ret)
+ goto dev_put;
+
+ /*
+ * Add a copy of APMT node pointer to platform_data to be used to
+ * retrieve APMT data information.
+ */
+ ret = platform_device_add_data(pdev, &node, sizeof(node));
+ if (ret)
+ goto dev_put;
+
+ pdev->dev.fwnode = fwnode;
+
+ ret = platform_device_add(pdev);
+
+ if (ret)
+ goto dev_put;
+
+ return 0;
+
+dev_put:
+ platform_device_put(pdev);
+
+ return ret;
+}
+
+static int __init apmt_init_platform_devices(void)
+{
+ struct acpi_apmt_node *apmt_node;
+ struct acpi_table_apmt *apmt;
+ struct fwnode_handle *fwnode;
+ u64 offset, end;
+ int ret;
+
+ /*
+ * apmt_table and apmt both point to the start of APMT table, but
+ * have different struct types
+ */
+ apmt = (struct acpi_table_apmt *)apmt_table;
+ offset = sizeof(*apmt);
+ end = apmt->header.length;
+
+ while (offset < end) {
+ apmt_node = ACPI_ADD_PTR(struct acpi_apmt_node, apmt,
+ offset);
+
+ fwnode = acpi_alloc_fwnode_static();
+ if (!fwnode)
+ return -ENOMEM;
+
+ ret = apmt_add_platform_device(apmt_node, fwnode);
+ if (ret) {
+ acpi_free_fwnode_static(fwnode);
+ return ret;
+ }
+
+ offset += apmt_node->length;
+ }
+
+ return 0;
+}
+
+void __init acpi_apmt_init(void)
+{
+ acpi_status status;
+ int ret;
+
+ /**
+ * APMT table nodes will be used at runtime after the apmt init,
+ * so we don't need to call acpi_put_table() to release
+ * the APMT table mapping.
+ */
+ status = acpi_get_table(ACPI_SIG_APMT, 0, &apmt_table);
+
+ if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND) {
+ const char *msg = acpi_format_exception(status);
+
+ pr_err("Failed to get APMT table, %s\n", msg);
+ }
+
+ return;
+ }
+
+ ret = apmt_init_platform_devices();
+ if (ret) {
+ pr_err("Failed to initialize APMT platform devices, ret: %d\n", ret);
+ acpi_put_table(apmt_table);
+ }
+}
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 8059baf4ef27..38fb84974f35 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -402,6 +402,10 @@ static struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
return NULL;
}
+#ifndef ACPI_IORT_SMMU_V3_DEVICEID_VALID
+#define ACPI_IORT_SMMU_V3_DEVICEID_VALID (1 << 4)
+#endif
+
static int iort_get_id_mapping_index(struct acpi_iort_node *node)
{
struct acpi_iort_smmu_v3 *smmu;
@@ -418,12 +422,16 @@ static int iort_get_id_mapping_index(struct acpi_iort_node *node)
smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
/*
- * ID mapping index is only ignored if all interrupts are
- * GSIV based
+ * Until IORT E.e (node rev. 5), the ID mapping index was
+ * defined to be valid unless all interrupts are GSIV-based.
*/
- if (smmu->event_gsiv && smmu->pri_gsiv && smmu->gerr_gsiv
- && smmu->sync_gsiv)
+ if (node->revision < 5) {
+ if (smmu->event_gsiv && smmu->pri_gsiv &&
+ smmu->gerr_gsiv && smmu->sync_gsiv)
+ return -EINVAL;
+ } else if (!(smmu->flags & ACPI_IORT_SMMU_V3_DEVICEID_VALID)) {
return -EINVAL;
+ }
if (smmu->id_mapping_index >= node->mapping_count) {
pr_err(FW_BUG "[node %p type %d] ID mapping index overflows valid mappings\n",
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index d466c8195314..351208eda9be 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -27,6 +27,7 @@
#include <linux/dmi.h>
#endif
#include <linux/acpi_agdi.h>
+#include <linux/acpi_apmt.h>
#include <linux/acpi_iort.h>
#include <linux/acpi_viot.h>
#include <linux/pci.h>
@@ -1423,6 +1424,7 @@ static int __init acpi_init(void)
acpi_setup_sb_notify_handler();
acpi_viot_init();
acpi_agdi_init();
+ acpi_apmt_init();
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-03 15:19:40 +0000