[PATCH 01/11] platform/x86/intel/vsec: Add intel_vsec_register
From: David E. Box
Date: Fri Sep 22 2023 - 17:30:41 EST
From: Gayatri Kammela <gayatri.kammela@xxxxxxxxxxxxxxx>
Add and export intel_vsec_register() to allow the registration of Intel
extended capabilities from other drivers. Add check to look for memory
conflicts before registering a new capability.
Signed-off-by: Gayatri Kammela <gayatri.kammela@xxxxxxxxxxxxxxx>
Signed-off-by: David E. Box <david.e.box@xxxxxxxxxxxxxxx>
---
drivers/platform/x86/intel/pmt/class.c | 2 +-
drivers/platform/x86/intel/vsec.c | 58 ++++++++++----------------
drivers/platform/x86/intel/vsec.h | 42 ++++++++++++++++++-
3 files changed, 63 insertions(+), 39 deletions(-)
diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c
index f32a233470de..2ad91d2fd954 100644
--- a/drivers/platform/x86/intel/pmt/class.c
+++ b/drivers/platform/x86/intel/pmt/class.c
@@ -31,7 +31,7 @@ bool intel_pmt_is_early_client_hw(struct device *dev)
* differences from the server platforms (which use the Out Of Band
* Management Services Module OOBMSM).
*/
- return !!(ivdev->info->quirks & VSEC_QUIRK_EARLY_HW);
+ return !!(ivdev->quirks & VSEC_QUIRK_EARLY_HW);
}
EXPORT_SYMBOL_NS_GPL(intel_pmt_is_early_client_hw, INTEL_PMT);
diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
index c1f9e4471b28..c5d0202068cf 100644
--- a/drivers/platform/x86/intel/vsec.c
+++ b/drivers/platform/x86/intel/vsec.c
@@ -24,13 +24,6 @@
#include "vsec.h"
-/* Intel DVSEC offsets */
-#define INTEL_DVSEC_ENTRIES 0xA
-#define INTEL_DVSEC_SIZE 0xB
-#define INTEL_DVSEC_TABLE 0xC
-#define INTEL_DVSEC_TABLE_BAR(x) ((x) & GENMASK(2, 0))
-#define INTEL_DVSEC_TABLE_OFFSET(x) ((x) & GENMASK(31, 3))
-#define TABLE_OFFSET_SHIFT 3
#define PMT_XA_START 0
#define PMT_XA_MAX INT_MAX
#define PMT_XA_LIMIT XA_LIMIT(PMT_XA_START, PMT_XA_MAX)
@@ -39,34 +32,6 @@ static DEFINE_IDA(intel_vsec_ida);
static DEFINE_IDA(intel_vsec_sdsi_ida);
static DEFINE_XARRAY_ALLOC(auxdev_array);
-/**
- * struct intel_vsec_header - Common fields of Intel VSEC and DVSEC registers.
- * @rev: Revision ID of the VSEC/DVSEC register space
- * @length: Length of the VSEC/DVSEC register space
- * @id: ID of the feature
- * @num_entries: Number of instances of the feature
- * @entry_size: Size of the discovery table for each feature
- * @tbir: BAR containing the discovery tables
- * @offset: BAR offset of start of the first discovery table
- */
-struct intel_vsec_header {
- u8 rev;
- u16 length;
- u16 id;
- u8 num_entries;
- u8 entry_size;
- u8 tbir;
- u32 offset;
-};
-
-enum intel_vsec_id {
- VSEC_ID_TELEMETRY = 2,
- VSEC_ID_WATCHER = 3,
- VSEC_ID_CRASHLOG = 4,
- VSEC_ID_SDSI = 65,
- VSEC_ID_TPMI = 66,
-};
-
static const char *intel_vsec_name(enum intel_vsec_id id)
{
switch (id) {
@@ -223,19 +188,28 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
header->offset + i * (header->entry_size * sizeof(u32));
tmp->end = tmp->start + (header->entry_size * sizeof(u32)) - 1;
tmp->flags = IORESOURCE_MEM;
+
+ /* Check resource is not in use */
+ if (!request_mem_region(tmp->start, resource_size(tmp), "")) {
+ kfree(res);
+ kfree(intel_vsec_dev);
+ return -EBUSY;
+ }
+
+ release_mem_region(tmp->start, resource_size(tmp));
}
intel_vsec_dev->pcidev = pdev;
intel_vsec_dev->resource = res;
intel_vsec_dev->num_resources = header->num_entries;
- intel_vsec_dev->info = info;
+ intel_vsec_dev->quirks = info->quirks;
if (header->id == VSEC_ID_SDSI)
intel_vsec_dev->ida = &intel_vsec_sdsi_ida;
else
intel_vsec_dev->ida = &intel_vsec_ida;
- return intel_vsec_add_aux(pdev, NULL, intel_vsec_dev,
+ return intel_vsec_add_aux(pdev, info->parent, intel_vsec_dev,
intel_vsec_name(header->id));
}
@@ -353,6 +327,16 @@ static bool intel_vsec_walk_vsec(struct pci_dev *pdev,
return have_devices;
}
+void intel_vsec_register(struct pci_dev *pdev,
+ struct intel_vsec_platform_info *info)
+{
+ if (!pdev || !info)
+ return;
+
+ intel_vsec_walk_header(pdev, info);
+}
+EXPORT_SYMBOL_NS_GPL(intel_vsec_register, INTEL_VSEC);
+
static int intel_vsec_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct intel_vsec_platform_info *info;
diff --git a/drivers/platform/x86/intel/vsec.h b/drivers/platform/x86/intel/vsec.h
index 0fd042c171ba..ab0f161f86c5 100644
--- a/drivers/platform/x86/intel/vsec.h
+++ b/drivers/platform/x86/intel/vsec.h
@@ -11,9 +11,45 @@
#define VSEC_CAP_SDSI BIT(3)
#define VSEC_CAP_TPMI BIT(4)
+/* Intel DVSEC offsets */
+#define INTEL_DVSEC_ENTRIES 0xA
+#define INTEL_DVSEC_SIZE 0xB
+#define INTEL_DVSEC_TABLE 0xC
+#define INTEL_DVSEC_TABLE_BAR(x) ((x) & GENMASK(2, 0))
+#define INTEL_DVSEC_TABLE_OFFSET(x) ((x) & GENMASK(31, 3))
+#define TABLE_OFFSET_SHIFT 3
+
struct pci_dev;
struct resource;
+enum intel_vsec_id {
+ VSEC_ID_TELEMETRY = 2,
+ VSEC_ID_WATCHER = 3,
+ VSEC_ID_CRASHLOG = 4,
+ VSEC_ID_SDSI = 65,
+ VSEC_ID_TPMI = 66,
+};
+
+/**
+ * struct intel_vsec_header - Common fields of Intel VSEC and DVSEC registers.
+ * @rev: Revision ID of the VSEC/DVSEC register space
+ * @length: Length of the VSEC/DVSEC register space
+ * @id: ID of the feature
+ * @num_entries:Number of instances of the feature
+ * @entry_size: Size of the discovery table for each feature
+ * @tbir: BAR containing the discovery tables
+ * @offset: BAR offset of start of the first discovery table
+ */
+struct intel_vsec_header {
+ u8 rev;
+ u16 length;
+ u16 id;
+ u8 num_entries;
+ u8 entry_size;
+ u8 tbir;
+ u32 offset;
+};
+
enum intel_vsec_quirks {
/* Watcher feature not supported */
VSEC_QUIRK_NO_WATCHER = BIT(0),
@@ -33,6 +69,7 @@ enum intel_vsec_quirks {
/* Platform specific data */
struct intel_vsec_platform_info {
+ struct device *parent;
struct intel_vsec_header **headers;
unsigned long caps;
unsigned long quirks;
@@ -43,10 +80,10 @@ struct intel_vsec_device {
struct pci_dev *pcidev;
struct resource *resource;
struct ida *ida;
- struct intel_vsec_platform_info *info;
int num_resources;
void *priv_data;
size_t priv_data_size;
+ unsigned long quirks;
};
int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent,
@@ -62,4 +99,7 @@ static inline struct intel_vsec_device *auxdev_to_ivdev(struct auxiliary_device
{
return container_of(auxdev, struct intel_vsec_device, auxdev);
}
+
+void intel_vsec_register(struct pci_dev *pdev,
+ struct intel_vsec_platform_info *info);
#endif
--
2.34.1