From: John Harrison <John.C.Harrison@xxxxxxxxx>
Implement support for fetching the hardware description table from the
GuC. The call is made twice - once without a destination buffer to
query the size and then a second time to fill in the buffer.
Note that the table is only available on ADL-P and later platforms.
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
Reviewed-by: Matthew Brost <matthew.brost@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
.../gpu/drm/i915/gt/uc/abi/guc_actions_abi.h | 1 +
.../gpu/drm/i915/gt/uc/abi/guc_errors_abi.h | 4 +
drivers/gpu/drm/i915/gt/uc/intel_guc.h | 3 +
.../gpu/drm/i915/gt/uc/intel_guc_hwconfig.c | 151 ++++++++++++++++++
.../gpu/drm/i915/gt/uc/intel_guc_hwconfig.h | 19 +++
drivers/gpu/drm/i915/gt/uc/intel_uc.c | 6 +
7 files changed, 185 insertions(+)
create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c
create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 6836b020a5be..ba9b6557d59d 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -192,6 +192,7 @@ i915-y += gt/uc/intel_uc.o \
gt/uc/intel_guc_rc.o \
gt/uc/intel_guc_slpc.o \
gt/uc/intel_guc_submission.o \
+ gt/uc/intel_guc_hwconfig.o \
gt/uc/intel_huc.o \
gt/uc/intel_huc_debugfs.o \
gt/uc/intel_huc_fw.o
diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
index fe5d7d261797..4a61c819f32b 100644
--- a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
+++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
@@ -137,6 +137,7 @@ enum intel_guc_action {
INTEL_GUC_ACTION_ENGINE_FAILURE_NOTIFICATION = 0x1009,
INTEL_GUC_ACTION_SETUP_PC_GUCRC = 0x3004,
INTEL_GUC_ACTION_AUTHENTICATE_HUC = 0x4000,
+ INTEL_GUC_ACTION_GET_HWCONFIG = 0x4100,
INTEL_GUC_ACTION_REGISTER_CONTEXT = 0x4502,
INTEL_GUC_ACTION_DEREGISTER_CONTEXT = 0x4503,
INTEL_GUC_ACTION_REGISTER_COMMAND_TRANSPORT_BUFFER = 0x4505,
diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_errors_abi.h b/drivers/gpu/drm/i915/gt/uc/abi/guc_errors_abi.h
index 488b6061ee89..f9e2a6aaef4a 100644
--- a/drivers/gpu/drm/i915/gt/uc/abi/guc_errors_abi.h
+++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_errors_abi.h
@@ -8,6 +8,10 @@
enum intel_guc_response_status {
INTEL_GUC_RESPONSE_STATUS_SUCCESS = 0x0,
+ INTEL_GUC_RESPONSE_NOT_SUPPORTED = 0x20,
+ INTEL_GUC_RESPONSE_NO_ATTRIBUTE_TABLE = 0x201,
+ INTEL_GUC_RESPONSE_NO_DECRYPTION_KEY = 0x202,
+ INTEL_GUC_RESPONSE_DECRYPTION_FAILED = 0x204,
INTEL_GUC_RESPONSE_STATUS_GENERIC_FAIL = 0xF000,
};
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index f9240d4baa69..ce2ff4bb0fd5 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -13,6 +13,7 @@
#include "intel_guc_fw.h"
#include "intel_guc_fwif.h"
#include "intel_guc_ct.h"
+#include "intel_guc_hwconfig.h"
#include "intel_guc_log.h"
#include "intel_guc_reg.h"
#include "intel_guc_slpc_types.h"
@@ -37,6 +38,8 @@ struct intel_guc {
struct intel_guc_ct ct;
/** @slpc: sub-structure containing SLPC related data and objects */
struct intel_guc_slpc slpc;
+ /** @hwconfig: hardware configuration KLV table */
+ struct intel_guc_hwconfig hwconfig;
/** @sched_engine: Global engine used to submit requests to GuC */
struct i915_sched_engine *sched_engine;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c
new file mode 100644
index 000000000000..ce6088f112d4
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.c
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include "gt/intel_gt.h"
+#include "i915_drv.h"
+#include "i915_memcpy.h"
+#include "intel_guc_hwconfig.h"
+
+static inline struct intel_guc *hwconfig_to_guc(struct intel_guc_hwconfig *hwconfig)
+{
+ return container_of(hwconfig, struct intel_guc, hwconfig);
+}
+
+/*
+ * GuC has a blob containing hardware configuration information (HWConfig).
+ * This is formatted as a simple and flexible KLV (Key/Length/Value) table.
+ *
+ * For example, a minimal version could be:
+ * enum device_attr {
+ * ATTR_SOME_VALUE = 0,
+ * ATTR_SOME_MASK = 1,
+ * };
+ *
+ * static const u32 hwconfig[] = {
+ * ATTR_SOME_VALUE,
+ * 1, // Value Length in DWords
+ * 8, // Value
+ *
+ * ATTR_SOME_MASK,
+ * 3,
+ * 0x00FFFFFFFF, 0xFFFFFFFF, 0xFF000000,
+ * };
+ *
+ * The attribute ids are defined in a hardware spec.
+ */
+
+static int __guc_action_get_hwconfig(struct intel_guc_hwconfig *hwconfig,
+ u32 ggtt_offset, u32 ggtt_size)
+{
+ struct intel_guc *guc = hwconfig_to_guc(hwconfig);
+ u32 action[] = {
+ INTEL_GUC_ACTION_GET_HWCONFIG,
+ ggtt_offset,
+ 0, /* upper 32 bits of address */
+ ggtt_size,
+ };
+ int ret;
+
+ ret = intel_guc_send_mmio(guc, action, ARRAY_SIZE(action), NULL, 0);
+ if (ret == -ENXIO)
+ return -ENOENT;
+
+ if (!ggtt_size && !ret)
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static int guc_hwconfig_discover_size(struct intel_guc_hwconfig *hwconfig)
+{
+ int ret;
+
+ /* Sending a query with too small a table will return the size of the table */
+ ret = __guc_action_get_hwconfig(hwconfig, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ hwconfig->size = ret;
+ return 0;
+}
+
+static int guc_hwconfig_fill_buffer(struct intel_guc_hwconfig *hwconfig)
+{
+ struct intel_guc *guc = hwconfig_to_guc(hwconfig);
+ struct i915_vma *vma;
+ u32 ggtt_offset;
+ void *vaddr;
+ int ret;
+
+ GEM_BUG_ON(!hwconfig->size);
+
+ ret = intel_guc_allocate_and_map_vma(guc, hwconfig->size, &vma, &vaddr);
+ if (ret)
+ return ret;
+
+ ggtt_offset = intel_guc_ggtt_offset(guc, vma);
+
+ ret = __guc_action_get_hwconfig(hwconfig, ggtt_offset, hwconfig->size);
+ if (ret >= 0)
+ memcpy(hwconfig->ptr, vaddr, hwconfig->size);
+
+ i915_vma_unpin_and_release(&vma, I915_VMA_RELEASE_MAP);
+
+ return ret;
+}
+
+static bool has_table(struct drm_i915_private *i915)
+{
+ if (IS_ALDERLAKE_P(i915))
+ return true;
+
+ return false;
+}
+
+/**
+ * intel_guc_hwconfig_fini - Finalize the HWConfig
+ *
+ * Free up the memory allocation holding the table.
+ */
+void intel_guc_hwconfig_fini(struct intel_guc_hwconfig *hwconfig)
+{
+ kfree(hwconfig->ptr);
+ hwconfig->size = 0;
+ hwconfig->ptr = NULL;
+}
+
+/**
+ * intel_guc_hwconfig_init - Initialize the HWConfig
+ *
+ * Retrieve the HWConfig table from the GuC and save it away in a local memory
+ * allocation. It can then be queried on demand by other users later on.
+ */
+int intel_guc_hwconfig_init(struct intel_guc_hwconfig *hwconfig)
+{
+ struct intel_guc *guc = hwconfig_to_guc(hwconfig);
+ struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
+ int ret;
+
+ if (!has_table(i915))
+ return 0;
+
+ ret = guc_hwconfig_discover_size(hwconfig);
+ if (ret)
+ return ret;
+
+ hwconfig->ptr = kmalloc(hwconfig->size, GFP_KERNEL);
+ if (!hwconfig->ptr) {
+ hwconfig->size = 0;
+ return -ENOMEM;
+ }
+
+ ret = guc_hwconfig_fill_buffer(hwconfig);
+ if (ret < 0) {
+ intel_guc_hwconfig_fini(hwconfig);
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.h
new file mode 100644
index 000000000000..fdd7f0d6e938
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_hwconfig.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef _INTEL_GUC_HWCONFIG_H_
+#define _INTEL_GUC_HWCONFIG_H_
+
+#include <linux/types.h>
+
+struct intel_guc_hwconfig {
+ u32 size;
+ void *ptr;
+};
+
+int intel_guc_hwconfig_init(struct intel_guc_hwconfig *hwconfig);
+void intel_guc_hwconfig_fini(struct intel_guc_hwconfig *hwconfig);
+
+#endif /* _INTEL_GUC_HWCONFIG_H_ */
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index 09ed29df67bc..d045ff6d4d63 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -489,6 +489,10 @@ static int __uc_init_hw(struct intel_uc *uc)
if (ret)
goto err_log_capture;
+ ret = intel_guc_hwconfig_init(&guc->hwconfig);
+ if (ret)
+ drm_err(&i915->drm, "Failed to retrieve hwconfig table: %d\n", ret);
+
ret = guc_enable_communication(guc);
if (ret)
goto err_log_capture;
@@ -562,6 +566,8 @@ static void __uc_fini_hw(struct intel_uc *uc)
if (intel_uc_uses_guc_submission(uc))
intel_guc_submission_disable(guc);
+ intel_guc_hwconfig_fini(&guc->hwconfig);
+
__uc_sanitize(uc);
}
--
2.34.1
