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Subject[PATCH v1 1/4] platform/x86/intel/vsec: Rework early hardware code
Date
From: "David E. Box" <david.e.box@linux.intel.com>

In the Intel VSEC PCI driver, use a new VSEC_QUIRK_EARLY_HW flag in
driver_data to indicate the need for early hardware quirks in
auxiliary devices. Remove the separate PCI ID list maintained by the
Intel PMT auxiliary driver.

Cc: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Gayatri Kammela <gayatri.kammela@linux.intel.com>
---
drivers/platform/x86/intel/pmt/class.c | 23 ++++---------
drivers/platform/x86/intel/vsec.c | 46 ++++++++++++--------------
drivers/platform/x86/intel/vsec.h | 11 +++++-
3 files changed, 39 insertions(+), 41 deletions(-)

diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c
index 1c9e3f3ea41c..53d7fd2943b4 100644
--- a/drivers/platform/x86/intel/pmt/class.c
+++ b/drivers/platform/x86/intel/pmt/class.c
@@ -20,25 +20,16 @@
#define PMT_XA_MAX INT_MAX
#define PMT_XA_LIMIT XA_LIMIT(PMT_XA_START, PMT_XA_MAX)

-/*
- * Early implementations of PMT on client platforms have some
- * differences from the server platforms (which use the Out Of Band
- * Management Services Module OOBMSM). This list tracks those
- * platforms as needed to handle those differences. Newer client
- * platforms are expected to be fully compatible with server.
- */
-static const struct pci_device_id pmt_telem_early_client_pci_ids[] = {
- { PCI_VDEVICE(INTEL, 0x467d) }, /* ADL */
- { PCI_VDEVICE(INTEL, 0x490e) }, /* DG1 */
- { PCI_VDEVICE(INTEL, 0x9a0d) }, /* TGL */
- { }
-};
-
bool intel_pmt_is_early_client_hw(struct device *dev)
{
- struct pci_dev *parent = to_pci_dev(dev->parent);
+ struct intel_vsec_device *ivdev = dev_to_ivdev(dev);

- return !!pci_match_id(pmt_telem_early_client_pci_ids, parent);
+ /*
+ * Early implementations of PMT on client platforms have some
+ * differences from the server platforms (which use the Out Of Band
+ * Management Services Module OOBMSM).
+ */
+ return !!(ivdev->info->quirks & VSEC_QUIRK_EARLY_HW);
}
EXPORT_SYMBOL_GPL(intel_pmt_is_early_client_hw);

diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
index bed436bf181f..d48df46e2e27 100644
--- a/drivers/platform/x86/intel/vsec.c
+++ b/drivers/platform/x86/intel/vsec.c
@@ -54,12 +54,6 @@ struct intel_vsec_header {
u32 offset;
};

-/* Platform specific data */
-struct intel_vsec_platform_info {
- struct intel_vsec_header **capabilities;
- unsigned long quirks;
-};
-
enum intel_vsec_id {
VSEC_ID_TELEMETRY = 2,
VSEC_ID_WATCHER = 3,
@@ -169,10 +163,11 @@ static int intel_vsec_add_aux(struct pci_dev *pdev, struct intel_vsec_device *in
}

static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *header,
- unsigned long quirks)
+ struct intel_vsec_platform_info *info)
{
struct intel_vsec_device *intel_vsec_dev;
struct resource *res, *tmp;
+ unsigned long quirks = info->quirks;
int i;

if (!intel_vsec_allowed(header->id) || intel_vsec_disabled(header->id, quirks))
@@ -216,7 +211,7 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
intel_vsec_dev->pcidev = pdev;
intel_vsec_dev->resource = res;
intel_vsec_dev->num_resources = header->num_entries;
- intel_vsec_dev->quirks = quirks;
+ intel_vsec_dev->info = info;

if (header->id == VSEC_ID_SDSI)
intel_vsec_dev->ida = &intel_vsec_sdsi_ida;
@@ -226,14 +221,15 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
return intel_vsec_add_aux(pdev, intel_vsec_dev, intel_vsec_name(header->id));
}

-static bool intel_vsec_walk_header(struct pci_dev *pdev, unsigned long quirks,
- struct intel_vsec_header **header)
+static bool intel_vsec_walk_header(struct pci_dev *pdev,
+ struct intel_vsec_platform_info *info)
{
+ struct intel_vsec_header **header = info->capabilities;
bool have_devices = false;
int ret;

for ( ; *header; header++) {
- ret = intel_vsec_add_dev(pdev, *header, quirks);
+ ret = intel_vsec_add_dev(pdev, *header, info);
if (ret)
dev_info(&pdev->dev, "Could not add device for DVSEC id %d\n",
(*header)->id);
@@ -244,7 +240,8 @@ static bool intel_vsec_walk_header(struct pci_dev *pdev, unsigned long quirks,
return have_devices;
}

-static bool intel_vsec_walk_dvsec(struct pci_dev *pdev, unsigned long quirks)
+static bool intel_vsec_walk_dvsec(struct pci_dev *pdev,
+ struct intel_vsec_platform_info *info)
{
bool have_devices = false;
int pos = 0;
@@ -283,7 +280,7 @@ static bool intel_vsec_walk_dvsec(struct pci_dev *pdev, unsigned long quirks)
pci_read_config_dword(pdev, pos + PCI_DVSEC_HEADER2, &hdr);
header.id = PCI_DVSEC_HEADER2_ID(hdr);

- ret = intel_vsec_add_dev(pdev, &header, quirks);
+ ret = intel_vsec_add_dev(pdev, &header, info);
if (ret)
continue;

@@ -293,7 +290,8 @@ static bool intel_vsec_walk_dvsec(struct pci_dev *pdev, unsigned long quirks)
return have_devices;
}

-static bool intel_vsec_walk_vsec(struct pci_dev *pdev, unsigned long quirks)
+static bool intel_vsec_walk_vsec(struct pci_dev *pdev,
+ struct intel_vsec_platform_info *info)
{
bool have_devices = false;
int pos = 0;
@@ -327,7 +325,7 @@ static bool intel_vsec_walk_vsec(struct pci_dev *pdev, unsigned long quirks)
header.tbir = INTEL_DVSEC_TABLE_BAR(table);
header.offset = INTEL_DVSEC_TABLE_OFFSET(table);

- ret = intel_vsec_add_dev(pdev, &header, quirks);
+ ret = intel_vsec_add_dev(pdev, &header, info);
if (ret)
continue;

@@ -341,7 +339,6 @@ static int intel_vsec_pci_probe(struct pci_dev *pdev, const struct pci_device_id
{
struct intel_vsec_platform_info *info;
bool have_devices = false;
- unsigned long quirks = 0;
int ret;

ret = pcim_enable_device(pdev);
@@ -349,17 +346,17 @@ static int intel_vsec_pci_probe(struct pci_dev *pdev, const struct pci_device_id
return ret;

info = (struct intel_vsec_platform_info *)id->driver_data;
- if (info)
- quirks = info->quirks;
+ if (!info)
+ return -EINVAL;

- if (intel_vsec_walk_dvsec(pdev, quirks))
+ if (intel_vsec_walk_dvsec(pdev, info))
have_devices = true;

- if (intel_vsec_walk_vsec(pdev, quirks))
+ if (intel_vsec_walk_vsec(pdev, info))
have_devices = true;

if (info && (info->quirks & VSEC_QUIRK_NO_DVSEC) &&
- intel_vsec_walk_header(pdev, quirks, info->capabilities))
+ intel_vsec_walk_header(pdev, info))
have_devices = true;

if (!have_devices)
@@ -370,7 +367,8 @@ static int intel_vsec_pci_probe(struct pci_dev *pdev, const struct pci_device_id

/* TGL info */
static const struct intel_vsec_platform_info tgl_info = {
- .quirks = VSEC_QUIRK_NO_WATCHER | VSEC_QUIRK_NO_CRASHLOG | VSEC_QUIRK_TABLE_SHIFT,
+ .quirks = VSEC_QUIRK_NO_WATCHER | VSEC_QUIRK_NO_CRASHLOG |
+ VSEC_QUIRK_TABLE_SHIFT | VSEC_QUIRK_EARLY_HW,
};

/* DG1 info */
@@ -390,7 +388,7 @@ static struct intel_vsec_header *dg1_capabilities[] = {

static const struct intel_vsec_platform_info dg1_info = {
.capabilities = dg1_capabilities,
- .quirks = VSEC_QUIRK_NO_DVSEC,
+ .quirks = VSEC_QUIRK_NO_DVSEC | VSEC_QUIRK_EARLY_HW,
};

#define PCI_DEVICE_ID_INTEL_VSEC_ADL 0x467d
@@ -400,7 +398,7 @@ static const struct intel_vsec_platform_info dg1_info = {
static const struct pci_device_id intel_vsec_pci_ids[] = {
{ PCI_DEVICE_DATA(INTEL, VSEC_ADL, &tgl_info) },
{ PCI_DEVICE_DATA(INTEL, VSEC_DG1, &dg1_info) },
- { PCI_DEVICE_DATA(INTEL, VSEC_OOBMSM, NULL) },
+ { PCI_DEVICE_DATA(INTEL, VSEC_OOBMSM, &(struct intel_vsec_platform_info) {}) },
{ PCI_DEVICE_DATA(INTEL, VSEC_TGL, &tgl_info) },
{ }
};
diff --git a/drivers/platform/x86/intel/vsec.h b/drivers/platform/x86/intel/vsec.h
index 4cc36678e8c5..3deeb05cf394 100644
--- a/drivers/platform/x86/intel/vsec.h
+++ b/drivers/platform/x86/intel/vsec.h
@@ -20,6 +20,15 @@ enum intel_vsec_quirks {

/* DVSEC not present (provided in driver data) */
VSEC_QUIRK_NO_DVSEC = BIT(3),
+
+ /* Platforms requiring quirk in the auxiliary driver */
+ VSEC_QUIRK_EARLY_HW = BIT(4),
+};
+
+/* Platform specific data */
+struct intel_vsec_platform_info {
+ struct intel_vsec_header **capabilities;
+ unsigned long quirks;
};

struct intel_vsec_device {
@@ -27,7 +36,7 @@ struct intel_vsec_device {
struct pci_dev *pcidev;
struct resource *resource;
struct ida *ida;
- unsigned long quirks;
+ struct intel_vsec_platform_info *info;
int num_resources;
};

--
2.32.0
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