drm/i915/guc: Update firmware to v62.0.0

Most of the changes to the 62.0.0 firmware revolved around CTB
communication channel. Conform to the new (stable) CTB protocol.

v2:
 (Michal)
  Add values back to kernel DOC for actions
 (Docs)
  Add 'CT buffer' back in to fix warning
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
[mattrope: Tweaked kerneldoc while pushing as suggested by Daniele/Michal]
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210616001302.84233-3-matthew.brost@intel.com

drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h

@@ -6,6 +6,113 @@
 #ifndef _ABI_GUC_ACTIONS_ABI_H
 #define _ABI_GUC_ACTIONS_ABI_H
 
+/**
+ * DOC: HOST2GUC_REGISTER_CTB
+ *
+ * This message is used as part of the `CTB based communication`_ setup.
+ *
+ * This message must be sent as `MMIO HXG Message`_.
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 |    31 | ORIGIN = GUC_HXG_ORIGIN_HOST_                                |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 30:28 | TYPE = GUC_HXG_TYPE_REQUEST_                                 |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 27:16 | DATA0 = MBZ                                                  |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  15:0 | ACTION = _`GUC_ACTION_HOST2GUC_REGISTER_CTB` = 0x4505        |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 1 | 31:12 | RESERVED = MBZ                                               |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  11:8 | **TYPE** - type for the `CT Buffer`_                         |
+ *  |   |       |                                                              |
+ *  |   |       |   - _`GUC_CTB_TYPE_HOST2GUC` = 0                             |
+ *  |   |       |   - _`GUC_CTB_TYPE_GUC2HOST` = 1                             |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |   7:0 | **SIZE** - size of the `CT Buffer`_ in 4K units minus 1      |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 2 |  31:0 | **DESC_ADDR** - GGTT address of the `CTB Descriptor`_        |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 3 |  31:0 | **BUFF_ADDF** - GGTT address of the `CT Buffer`_             |
+ *  +---+-------+--------------------------------------------------------------+
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 |    31 | ORIGIN = GUC_HXG_ORIGIN_GUC_                                 |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 30:28 | TYPE = GUC_HXG_TYPE_RESPONSE_SUCCESS_                        |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  27:0 | DATA0 = MBZ                                                  |
+ *  +---+-------+--------------------------------------------------------------+
+ */
+#define GUC_ACTION_HOST2GUC_REGISTER_CTB		0x4505
+
+#define HOST2GUC_REGISTER_CTB_REQUEST_MSG_LEN		(GUC_HXG_REQUEST_MSG_MIN_LEN + 3u)
+#define HOST2GUC_REGISTER_CTB_REQUEST_MSG_0_MBZ		GUC_HXG_REQUEST_MSG_0_DATA0
+#define HOST2GUC_REGISTER_CTB_REQUEST_MSG_1_MBZ		(0xfffff << 12)
+#define HOST2GUC_REGISTER_CTB_REQUEST_MSG_1_TYPE	(0xf << 8)
+#define   GUC_CTB_TYPE_HOST2GUC				0u
+#define   GUC_CTB_TYPE_GUC2HOST				1u
+#define HOST2GUC_REGISTER_CTB_REQUEST_MSG_1_SIZE	(0xff << 0)
+#define HOST2GUC_REGISTER_CTB_REQUEST_MSG_2_DESC_ADDR	GUC_HXG_REQUEST_MSG_n_DATAn
+#define HOST2GUC_REGISTER_CTB_REQUEST_MSG_3_BUFF_ADDR	GUC_HXG_REQUEST_MSG_n_DATAn
+
+#define HOST2GUC_REGISTER_CTB_RESPONSE_MSG_LEN		GUC_HXG_RESPONSE_MSG_MIN_LEN
+#define HOST2GUC_REGISTER_CTB_RESPONSE_MSG_0_MBZ	GUC_HXG_RESPONSE_MSG_0_DATA0
+
+/**
+ * DOC: HOST2GUC_DEREGISTER_CTB
+ *
+ * This message is used as part of the `CTB based communication`_ teardown.
+ *
+ * This message must be sent as `MMIO HXG Message`_.
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 |    31 | ORIGIN = GUC_HXG_ORIGIN_HOST_                                |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 30:28 | TYPE = GUC_HXG_TYPE_REQUEST_                                 |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 27:16 | DATA0 = MBZ                                                  |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  15:0 | ACTION = _`GUC_ACTION_HOST2GUC_DEREGISTER_CTB` = 0x4506      |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 1 | 31:12 | RESERVED = MBZ                                               |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  11:8 | **TYPE** - type of the `CT Buffer`_                          |
+ *  |   |       |                                                              |
+ *  |   |       | see `GUC_ACTION_HOST2GUC_REGISTER_CTB`_                      |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |   7:0 | RESERVED = MBZ                                               |
+ *  +---+-------+--------------------------------------------------------------+
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 |    31 | ORIGIN = GUC_HXG_ORIGIN_GUC_                                 |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 30:28 | TYPE = GUC_HXG_TYPE_RESPONSE_SUCCESS_                        |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  27:0 | DATA0 = MBZ                                                  |
+ *  +---+-------+--------------------------------------------------------------+
+ */
+#define GUC_ACTION_HOST2GUC_DEREGISTER_CTB		0x4506
+
+#define HOST2GUC_DEREGISTER_CTB_REQUEST_MSG_LEN		(GUC_HXG_REQUEST_MSG_MIN_LEN + 1u)
+#define HOST2GUC_DEREGISTER_CTB_REQUEST_MSG_0_MBZ	GUC_HXG_REQUEST_MSG_0_DATA0
+#define HOST2GUC_DEREGISTER_CTB_REQUEST_MSG_1_MBZ	(0xfffff << 12)
+#define HOST2GUC_DEREGISTER_CTB_REQUEST_MSG_1_TYPE	(0xf << 8)
+#define HOST2GUC_DEREGISTER_CTB_REQUEST_MSG_1_MBZ2	(0xff << 0)
+
+#define HOST2GUC_DEREGISTER_CTB_RESPONSE_MSG_LEN	GUC_HXG_RESPONSE_MSG_MIN_LEN
+#define HOST2GUC_DEREGISTER_CTB_RESPONSE_MSG_0_MBZ	GUC_HXG_RESPONSE_MSG_0_DATA0
+
+/* legacy definitions */
+
 enum intel_guc_action {
 	INTEL_GUC_ACTION_DEFAULT = 0x0,
 	INTEL_GUC_ACTION_REQUEST_PREEMPTION = 0x2,

drivers/gpu/drm/i915/gt/uc/abi/guc_communication_ctb_abi.h

@@ -7,6 +7,110 @@
 #define _ABI_GUC_COMMUNICATION_CTB_ABI_H
 
 #include <linux/types.h>
+#include <linux/build_bug.h>
+
+#include "guc_messages_abi.h"
+
+/**
+ * DOC: CT Buffer
+ *
+ * Circular buffer used to send `CTB Message`_
+ */
+
+/**
+ * DOC: CTB Descriptor
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 |  31:0 | **HEAD** - offset (in dwords) to the last dword that was     |
+ *  |   |       | read from the `CT Buffer`_.                                  |
+ *  |   |       | It can only be updated by the receiver.                      |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 1 |  31:0 | **TAIL** - offset (in dwords) to the last dword that was     |
+ *  |   |       | written to the `CT Buffer`_.                                 |
+ *  |   |       | It can only be updated by the sender.                        |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 2 |  31:0 | **STATUS** - status of the CTB                               |
+ *  |   |       |                                                              |
+ *  |   |       |   - _`GUC_CTB_STATUS_NO_ERROR` = 0 (normal operation)        |
+ *  |   |       |   - _`GUC_CTB_STATUS_OVERFLOW` = 1 (head/tail too large)     |
+ *  |   |       |   - _`GUC_CTB_STATUS_UNDERFLOW` = 2 (truncated message)      |
+ *  |   |       |   - _`GUC_CTB_STATUS_MISMATCH` = 4 (head/tail modified)      |
+ *  +---+-------+--------------------------------------------------------------+
+ *  |...|       | RESERVED = MBZ                                               |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 15|  31:0 | RESERVED = MBZ                                               |
+ *  +---+-------+--------------------------------------------------------------+
+ */
+
+struct guc_ct_buffer_desc {
+	u32 head;
+	u32 tail;
+	u32 status;
+#define GUC_CTB_STATUS_NO_ERROR				0
+#define GUC_CTB_STATUS_OVERFLOW				(1 << 0)
+#define GUC_CTB_STATUS_UNDERFLOW			(1 << 1)
+#define GUC_CTB_STATUS_MISMATCH				(1 << 2)
+	u32 reserved[13];
+} __packed;
+static_assert(sizeof(struct guc_ct_buffer_desc) == 64);
+
+/**
+ * DOC: CTB Message
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 | 31:16 | **FENCE** - message identifier                               |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 15:12 | **FORMAT** - format of the CTB message                       |
+ *  |   |       |  - _`GUC_CTB_FORMAT_HXG` = 0 - see `CTB HXG Message`_        |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  11:8 | **RESERVED**                                                 |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |   7:0 | **NUM_DWORDS** - length of the CTB message (w/o header)      |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 1 |  31:0 | optional (depends on FORMAT)                                 |
+ *  +---+-------+                                                              |
+ *  |...|       |                                                              |
+ *  +---+-------+                                                              |
+ *  | n |  31:0 |                                                              |
+ *  +---+-------+--------------------------------------------------------------+
+ */
+
+#define GUC_CTB_MSG_MIN_LEN			1u
+#define GUC_CTB_MSG_MAX_LEN			256u
+#define GUC_CTB_MSG_0_FENCE			(0xffff << 16)
+#define GUC_CTB_MSG_0_FORMAT			(0xf << 12)
+#define   GUC_CTB_FORMAT_HXG			0u
+#define GUC_CTB_MSG_0_RESERVED			(0xf << 8)
+#define GUC_CTB_MSG_0_NUM_DWORDS		(0xff << 0)
+
+/**
+ * DOC: CTB HXG Message
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 | 31:16 | FENCE                                                        |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   | 15:12 | FORMAT = GUC_CTB_FORMAT_HXG_                                 |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |  11:8 | RESERVED = MBZ                                               |
+ *  |   +-------+--------------------------------------------------------------+
+ *  |   |   7:0 | NUM_DWORDS = length (in dwords) of the embedded HXG message  |
+ *  +---+-------+--------------------------------------------------------------+
+ *  | 1 |  31:0 |  +--------------------------------------------------------+  |
+ *  +---+-------+  |                                                        |  |
+ *  |...|       |  |  Embedded `HXG Message`_                               |  |
+ *  +---+-------+  |                                                        |  |
+ *  | n |  31:0 |  +--------------------------------------------------------+  |
+ *  +---+-------+--------------------------------------------------------------+
+ */
+
+#define GUC_CTB_HXG_MSG_MIN_LEN		(GUC_CTB_MSG_MIN_LEN + GUC_HXG_MSG_MIN_LEN)
+#define GUC_CTB_HXG_MSG_MAX_LEN		GUC_CTB_MSG_MAX_LEN
 
 /**
  * DOC: CTB based communication
@@ -60,28 +164,6 @@
  * - **flags**, holds various bits to control message handling
  */
 
-/*
- * Describes single command transport buffer.
- * Used by both guc-master and clients.
- */
-struct guc_ct_buffer_desc {
-	u32 addr;		/* gfx address */
-	u64 host_private;	/* host private data */
-	u32 size;		/* size in bytes */
-	u32 head;		/* offset updated by GuC*/
-	u32 tail;		/* offset updated by owner */
-	u32 is_in_error;	/* error indicator */
-	u32 reserved1;
-	u32 reserved2;
-	u32 owner;		/* id of the channel owner */
-	u32 owner_sub_id;	/* owner-defined field for extra tracking */
-	u32 reserved[5];
-} __packed;
-
-/* Type of command transport buffer */
-#define INTEL_GUC_CT_BUFFER_TYPE_SEND	0x0u
-#define INTEL_GUC_CT_BUFFER_TYPE_RECV	0x1u
-
 /*
  * Definition of the command transport message header (DW0)
  *

drivers/gpu/drm/i915/gt/uc/abi/guc_communication_mmio_abi.h

@@ -7,46 +7,43 @@
 #define _ABI_GUC_COMMUNICATION_MMIO_ABI_H
 
 /**
- * DOC: MMIO based communication
+ * DOC: GuC MMIO based communication
  *
- * The MMIO based communication between Host and GuC uses software scratch
- * registers, where first register holds data treated as message header,
- * and other registers are used to hold message payload.
+ * The MMIO based communication between Host and GuC relies on special
+ * hardware registers which format could be defined by the software
+ * (so called scratch registers).
  *
- * For Gen9+, GuC uses software scratch registers 0xC180-0xC1B8,
- * but no H2G command takes more than 8 parameters and the GuC FW
- * itself uses an 8-element array to store the H2G message.
+ * Each MMIO based message, both Host to GuC (H2G) and GuC to Host (G2H)
+ * messages, which maximum length depends on number of available scratch
+ * registers, is directly written into those scratch registers.
  *
- *      +-----------+---------+---------+---------+
- *      |  MMIO[0]  | MMIO[1] |   ...   | MMIO[n] |
- *      +-----------+---------+---------+---------+
- *      | header    |      optional payload       |
- *      +======+====+=========+=========+=========+
- *      | 31:28|type|         |         |         |
- *      +------+----+         |         |         |
- *      | 27:16|data|         |         |         |
- *      +------+----+         |         |         |
- *      |  15:0|code|         |         |         |
- *      +------+----+---------+---------+---------+
+ * For Gen9+, there are 16 software scratch registers 0xC180-0xC1B8,
+ * but no H2G command takes more than 4 parameters and the GuC firmware
+ * itself uses an 4-element array to store the H2G message.
  *
- * The message header consists of:
+ * For Gen11+, there are additional 4 registers 0x190240-0x19024C, which
+ * are, regardless on lower count, preferred over legacy ones.
  *
- * - **type**, indicates message type
- * - **code**, indicates message code, is specific for **type**
- * - **data**, indicates message data, optional, depends on **code**
- *
- * The following message **types** are supported:
- *
- * - **REQUEST**, indicates Host-to-GuC request, requested GuC action code
- *   must be priovided in **code** field. Optional action specific parameters
- *   can be provided in remaining payload registers or **data** field.
- *
- * - **RESPONSE**, indicates GuC-to-Host response from earlier GuC request,
- *   action response status will be provided in **code** field. Optional
- *   response data can be returned in remaining payload registers or **data**
- *   field.
+ * The MMIO based communication is mainly used during driver initialization
+ * phase to setup the `CTB based communication`_ that will be used afterwards.
  */
 
-#define GUC_MAX_MMIO_MSG_LEN		8
+#define GUC_MAX_MMIO_MSG_LEN		4
+
+/**
+ * DOC: MMIO HXG Message
+ *
+ * Format of the MMIO messages follows definitions of `HXG Message`_.
+ *
+ *  +---+-------+--------------------------------------------------------------+
+ *  |   | Bits  | Description                                                  |
+ *  +===+=======+==============================================================+
+ *  | 0 |  31:0 |  +--------------------------------------------------------+  |
+ *  +---+-------+  |                                                        |  |
+ *  |...|       |  |  Embedded `HXG Message`_                               |  |
+ *  +---+-------+  |                                                        |  |
+ *  | n |  31:0 |  +--------------------------------------------------------+  |
+ *  +---+-------+--------------------------------------------------------------+
+ */
 
 #endif /* _ABI_GUC_COMMUNICATION_MMIO_ABI_H */

drivers/gpu/drm/i915/gt/uc/intel_guc.c

@@ -219,24 +219,19 @@ static u32 guc_ctl_log_params_flags(struct intel_guc *guc)
 
 	BUILD_BUG_ON(!CRASH_BUFFER_SIZE);
 	BUILD_BUG_ON(!IS_ALIGNED(CRASH_BUFFER_SIZE, UNIT));
-	BUILD_BUG_ON(!DPC_BUFFER_SIZE);
-	BUILD_BUG_ON(!IS_ALIGNED(DPC_BUFFER_SIZE, UNIT));
-	BUILD_BUG_ON(!ISR_BUFFER_SIZE);
-	BUILD_BUG_ON(!IS_ALIGNED(ISR_BUFFER_SIZE, UNIT));
+	BUILD_BUG_ON(!DEBUG_BUFFER_SIZE);
+	BUILD_BUG_ON(!IS_ALIGNED(DEBUG_BUFFER_SIZE, UNIT));
 
 	BUILD_BUG_ON((CRASH_BUFFER_SIZE / UNIT - 1) >
 			(GUC_LOG_CRASH_MASK >> GUC_LOG_CRASH_SHIFT));
-	BUILD_BUG_ON((DPC_BUFFER_SIZE / UNIT - 1) >
-			(GUC_LOG_DPC_MASK >> GUC_LOG_DPC_SHIFT));
-	BUILD_BUG_ON((ISR_BUFFER_SIZE / UNIT - 1) >
-			(GUC_LOG_ISR_MASK >> GUC_LOG_ISR_SHIFT));
+	BUILD_BUG_ON((DEBUG_BUFFER_SIZE / UNIT - 1) >
+			(GUC_LOG_DEBUG_MASK >> GUC_LOG_DEBUG_SHIFT));
 
 	flags = GUC_LOG_VALID |
 		GUC_LOG_NOTIFY_ON_HALF_FULL |
 		FLAG |
 		((CRASH_BUFFER_SIZE / UNIT - 1) << GUC_LOG_CRASH_SHIFT) |
-		((DPC_BUFFER_SIZE / UNIT - 1) << GUC_LOG_DPC_SHIFT) |
-		((ISR_BUFFER_SIZE / UNIT - 1) << GUC_LOG_ISR_SHIFT) |
+		((DEBUG_BUFFER_SIZE / UNIT - 1) << GUC_LOG_DEBUG_SHIFT) |
 		(offset << GUC_LOG_BUF_ADDR_SHIFT);
 
 	#undef UNIT
@@ -376,29 +371,27 @@ void intel_guc_fini(struct intel_guc *guc)
 /*
  * This function implements the MMIO based host to GuC interface.
  */
-int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len,
+int intel_guc_send_mmio(struct intel_guc *guc, const u32 *request, u32 len,
 			u32 *response_buf, u32 response_buf_size)
 {
+	struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
 	struct intel_uncore *uncore = guc_to_gt(guc)->uncore;
-	u32 status;
+	u32 header;
 	int i;
 	int ret;
 
 	GEM_BUG_ON(!len);
 	GEM_BUG_ON(len > guc->send_regs.count);
 
-	/* We expect only action code */
-	GEM_BUG_ON(*action & ~INTEL_GUC_MSG_CODE_MASK);
-
-	/* If CT is available, we expect to use MMIO only during init/fini */
-	GEM_BUG_ON(*action != INTEL_GUC_ACTION_REGISTER_COMMAND_TRANSPORT_BUFFER &&
-		   *action != INTEL_GUC_ACTION_DEREGISTER_COMMAND_TRANSPORT_BUFFER);
+	GEM_BUG_ON(FIELD_GET(GUC_HXG_MSG_0_ORIGIN, request[0]) != GUC_HXG_ORIGIN_HOST);
+	GEM_BUG_ON(FIELD_GET(GUC_HXG_MSG_0_TYPE, request[0]) != GUC_HXG_TYPE_REQUEST);
 
 	mutex_lock(&guc->send_mutex);
 	intel_uncore_forcewake_get(uncore, guc->send_regs.fw_domains);
 
+retry:
 	for (i = 0; i < len; i++)
-		intel_uncore_write(uncore, guc_send_reg(guc, i), action[i]);
+		intel_uncore_write(uncore, guc_send_reg(guc, i), request[i]);
 
 	intel_uncore_posting_read(uncore, guc_send_reg(guc, i - 1));
 
@@ -410,30 +403,74 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len,
 	 */
 	ret = __intel_wait_for_register_fw(uncore,
 					   guc_send_reg(guc, 0),
-					   INTEL_GUC_MSG_TYPE_MASK,
-					   INTEL_GUC_MSG_TYPE_RESPONSE <<
-					   INTEL_GUC_MSG_TYPE_SHIFT,
-					   10, 10, &status);
-	/* If GuC explicitly returned an error, convert it to -EIO */
-	if (!ret && !INTEL_GUC_MSG_IS_RESPONSE_SUCCESS(status))
-		ret = -EIO;
+					   GUC_HXG_MSG_0_ORIGIN,
+					   FIELD_PREP(GUC_HXG_MSG_0_ORIGIN,
+						      GUC_HXG_ORIGIN_GUC),
+					   10, 10, &header);
+	if (unlikely(ret)) {
+timeout:
+		drm_err(&i915->drm, "mmio request %#x: no reply %x\n",
+			request[0], header);
+		goto out;
+	}
 
-	if (ret) {
-		DRM_ERROR("MMIO: GuC action %#x failed with error %d %#x\n",
-			  action[0], ret, status);
+	if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) == GUC_HXG_TYPE_NO_RESPONSE_BUSY) {
+#define done ({ header = intel_uncore_read(uncore, guc_send_reg(guc, 0)); \
+		FIELD_GET(GUC_HXG_MSG_0_ORIGIN, header) != GUC_HXG_ORIGIN_GUC || \
+		FIELD_GET(GUC_HXG_MSG_0_TYPE, header) != GUC_HXG_TYPE_NO_RESPONSE_BUSY; })
+
+		ret = wait_for(done, 1000);
+		if (unlikely(ret))
+			goto timeout;
+		if (unlikely(FIELD_GET(GUC_HXG_MSG_0_ORIGIN, header) !=
+				       GUC_HXG_ORIGIN_GUC))
+			goto proto;
+#undef done
+	}
+
+	if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) == GUC_HXG_TYPE_NO_RESPONSE_RETRY) {
+		u32 reason = FIELD_GET(GUC_HXG_RETRY_MSG_0_REASON, header);
+
+		drm_dbg(&i915->drm, "mmio request %#x: retrying, reason %u\n",
+			request[0], reason);
+		goto retry;
+	}
+
+	if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) == GUC_HXG_TYPE_RESPONSE_FAILURE) {
+		u32 hint = FIELD_GET(GUC_HXG_FAILURE_MSG_0_HINT, header);
+		u32 error = FIELD_GET(GUC_HXG_FAILURE_MSG_0_ERROR, header);
+
+		drm_err(&i915->drm, "mmio request %#x: failure %x/%u\n",
+			request[0], error, hint);
+		ret = -ENXIO;
+		goto out;
+	}
+
+	if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) != GUC_HXG_TYPE_RESPONSE_SUCCESS) {
+proto:
+		drm_err(&i915->drm, "mmio request %#x: unexpected reply %#x\n",
+			request[0], header);
+		ret = -EPROTO;
 		goto out;
 	}
 
 	if (response_buf) {
-		int count = min(response_buf_size, guc->send_regs.count - 1);
+		int count = min(response_buf_size, guc->send_regs.count);
 
-		for (i = 0; i < count; i++)
+		GEM_BUG_ON(!count);
+
+		response_buf[0] = header;
+
+		for (i = 1; i < count; i++)
 			response_buf[i] = intel_uncore_read(uncore,
-							    guc_send_reg(guc, i + 1));
-	}
+							    guc_send_reg(guc, i));
 
-	/* Use data from the GuC response as our return value */
-	ret = INTEL_GUC_MSG_TO_DATA(status);
+		/* Use number of copied dwords as our return value */
+		ret = count;
+	} else {
+		/* Use data from the GuC response as our return value */
+		ret = FIELD_GET(GUC_HXG_RESPONSE_MSG_0_DATA0, header);
+	}
 
 out:
 	intel_uncore_forcewake_put(uncore, guc->send_regs.fw_domains);

drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c

@@ -24,10 +24,6 @@
  *      +---------------------------------------+
  *      | guc_gt_system_info                    |
  *      +---------------------------------------+
- *      | guc_clients_info                      |
- *      +---------------------------------------+
- *      | guc_ct_pool_entry[size]               |
- *      +---------------------------------------+
  *      | padding                               |
  *      +---------------------------------------+ <== 4K aligned
  *      | private data                          |
@@ -39,8 +35,6 @@ struct __guc_ads_blob {
 	struct guc_ads ads;
 	struct guc_policies policies;
 	struct guc_gt_system_info system_info;
-	struct guc_clients_info clients_info;
-	struct guc_ct_pool_entry ct_pool[GUC_CT_POOL_SIZE];
 } __packed;
 
 static u32 guc_ads_private_data_size(struct intel_guc *guc)
@@ -59,38 +53,15 @@ static u32 guc_ads_blob_size(struct intel_guc *guc)
 	       guc_ads_private_data_size(guc);
 }
 
-static void guc_policy_init(struct guc_policy *policy)
-{
-	policy->execution_quantum = POLICY_DEFAULT_EXECUTION_QUANTUM_US;
-	policy->preemption_time = POLICY_DEFAULT_PREEMPTION_TIME_US;
-	policy->fault_time = POLICY_DEFAULT_FAULT_TIME_US;
-	policy->policy_flags = 0;
-}
-
 static void guc_policies_init(struct guc_policies *policies)
 {
-	struct guc_policy *policy;
-	u32 p, i;
-
-	policies->dpc_promote_time = POLICY_DEFAULT_DPC_PROMOTE_TIME_US;
-	policies->max_num_work_items = POLICY_MAX_NUM_WI;
-
-	for (p = 0; p < GUC_CLIENT_PRIORITY_NUM; p++) {
-		for (i = 0; i < GUC_MAX_ENGINE_CLASSES; i++) {
-			policy = &policies->policy[p][i];
-
-			guc_policy_init(policy);
-		}
-	}
-
+	policies->dpc_promote_time = GLOBAL_POLICY_DEFAULT_DPC_PROMOTE_TIME_US;
+	policies->max_num_work_items = GLOBAL_POLICY_MAX_NUM_WI;
+	/* Disable automatic resets as not yet supported. */
+	policies->global_flags = GLOBAL_POLICY_DISABLE_ENGINE_RESET;
 	policies->is_valid = 1;
 }
 
-static void guc_ct_pool_entries_init(struct guc_ct_pool_entry *pool, u32 num)
-{
-	memset(pool, 0, num * sizeof(*pool));
-}
-
 static void guc_mapping_table_init(struct intel_gt *gt,
 				   struct guc_gt_system_info *system_info)
 {
@@ -178,17 +149,9 @@ static void __guc_ads_init(struct intel_guc *guc)
 
 	base = intel_guc_ggtt_offset(guc, guc->ads_vma);
 
-	/* Clients info  */
-	guc_ct_pool_entries_init(blob->ct_pool, ARRAY_SIZE(blob->ct_pool));
-
-	blob->clients_info.clients_num = 1;
-	blob->clients_info.ct_pool_addr = base + ptr_offset(blob, ct_pool);
-	blob->clients_info.ct_pool_count = ARRAY_SIZE(blob->ct_pool);
-
 	/* ADS */
 	blob->ads.scheduler_policies = base + ptr_offset(blob, policies);
 	blob->ads.gt_system_info = base + ptr_offset(blob, system_info);
-	blob->ads.clients_info = base + ptr_offset(blob, clients_info);
 
 	/* Private Data */
 	blob->ads.private_data = base + guc_ads_private_data_offset(guc);

drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h

@@ -31,13 +31,15 @@ struct intel_guc;
  * @lock: protects access to the commands buffer and buffer descriptor
  * @desc: pointer to the buffer descriptor
  * @cmds: pointer to the commands buffer
- * @size: size of the commands buffer
+ * @size: size of the commands buffer in dwords
+ * @broken: flag to indicate if descriptor data is broken
  */
 struct intel_guc_ct_buffer {
 	spinlock_t lock;
 	struct guc_ct_buffer_desc *desc;
 	u32 *cmds;
 	u32 size;
+	bool broken;
 };
 
 
@@ -59,7 +61,7 @@ struct intel_guc_ct {
 	struct tasklet_struct receive_tasklet;
 
 	struct {
-		u32 last_fence; /* last fence used to send request */
+		u16 last_fence; /* last fence used to send request */
 
 		spinlock_t lock; /* protects pending requests list */
 		struct list_head pending; /* requests waiting for response */

drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h

@@ -81,10 +81,8 @@
 #define   GUC_LOG_ALLOC_IN_MEGABYTE	(1 << 3)
 #define   GUC_LOG_CRASH_SHIFT		4
 #define   GUC_LOG_CRASH_MASK		(0x3 << GUC_LOG_CRASH_SHIFT)
-#define   GUC_LOG_DPC_SHIFT		6
-#define   GUC_LOG_DPC_MASK	        (0x7 << GUC_LOG_DPC_SHIFT)
-#define   GUC_LOG_ISR_SHIFT		9
-#define   GUC_LOG_ISR_MASK	        (0x7 << GUC_LOG_ISR_SHIFT)
+#define   GUC_LOG_DEBUG_SHIFT		6
+#define   GUC_LOG_DEBUG_MASK	        (0xF << GUC_LOG_DEBUG_SHIFT)
 #define   GUC_LOG_BUF_ADDR_SHIFT	12
 
 #define GUC_CTL_WA			1
@@ -247,32 +245,14 @@ struct guc_stage_desc {
 
 /* Scheduling policy settings */
 
-/* Reset engine upon preempt failure */
-#define POLICY_RESET_ENGINE		(1<<0)
-/* Preempt to idle on quantum expiry */
-#define POLICY_PREEMPT_TO_IDLE		(1<<1)
-
-#define POLICY_MAX_NUM_WI 15
-#define POLICY_DEFAULT_DPC_PROMOTE_TIME_US 500000
-#define POLICY_DEFAULT_EXECUTION_QUANTUM_US 1000000
-#define POLICY_DEFAULT_PREEMPTION_TIME_US 500000
-#define POLICY_DEFAULT_FAULT_TIME_US 250000
-
-struct guc_policy {
-	/* Time for one workload to execute. (in micro seconds) */
-	u32 execution_quantum;
-	/* Time to wait for a preemption request to completed before issuing a
-	 * reset. (in micro seconds). */
-	u32 preemption_time;
-	/* How much time to allow to run after the first fault is observed.
-	 * Then preempt afterwards. (in micro seconds) */
-	u32 fault_time;
-	u32 policy_flags;
-	u32 reserved[8];
-} __packed;
+#define GLOBAL_POLICY_MAX_NUM_WI 15
+
+/* Don't reset an engine upon preemption failure */
+#define GLOBAL_POLICY_DISABLE_ENGINE_RESET				BIT(0)
+
+#define GLOBAL_POLICY_DEFAULT_DPC_PROMOTE_TIME_US 500000
 
 struct guc_policies {
-	struct guc_policy policy[GUC_CLIENT_PRIORITY_NUM][GUC_MAX_ENGINE_CLASSES];
 	u32 submission_queue_depth[GUC_MAX_ENGINE_CLASSES];
 	/* In micro seconds. How much time to allow before DPC processing is
 	 * called back via interrupt (to prevent DPC queue drain starving).
@@ -286,6 +266,7 @@ struct guc_policies {
 	 * idle. */
 	u32 max_num_work_items;
 
+	u32 global_flags;
 	u32 reserved[4];
 } __packed;
 
@@ -311,29 +292,13 @@ struct guc_gt_system_info {
 	u32 generic_gt_sysinfo[GUC_GENERIC_GT_SYSINFO_MAX];
 } __packed;
 
-/* Clients info */
-struct guc_ct_pool_entry {
-	struct guc_ct_buffer_desc desc;
-	u32 reserved[7];
-} __packed;
-
-#define GUC_CT_POOL_SIZE	2
-
-struct guc_clients_info {
-	u32 clients_num;
-	u32 reserved0[13];
-	u32 ct_pool_addr;
-	u32 ct_pool_count;
-	u32 reserved[4];
-} __packed;
-
 /* GuC Additional Data Struct */
 struct guc_ads {
 	struct guc_mmio_reg_set reg_state_list[GUC_MAX_ENGINE_CLASSES][GUC_MAX_INSTANCES_PER_CLASS];
 	u32 reserved0;
 	u32 scheduler_policies;
 	u32 gt_system_info;
-	u32 clients_info;
+	u32 reserved1;
 	u32 control_data;
 	u32 golden_context_lrca[GUC_MAX_ENGINE_CLASSES];
 	u32 eng_state_size[GUC_MAX_ENGINE_CLASSES];
@@ -344,8 +309,7 @@ struct guc_ads {
 /* GuC logging structures */
 
 enum guc_log_buffer_type {
-	GUC_ISR_LOG_BUFFER,
-	GUC_DPC_LOG_BUFFER,
+	GUC_DEBUG_LOG_BUFFER,
 	GUC_CRASH_DUMP_LOG_BUFFER,
 	GUC_MAX_LOG_BUFFER
 };
@@ -414,23 +378,6 @@ struct guc_shared_ctx_data {
 	struct guc_ctx_report preempt_ctx_report[GUC_MAX_ENGINES_NUM];
 } __packed;
 
-#define __INTEL_GUC_MSG_GET(T, m) \
-	(((m) & INTEL_GUC_MSG_ ## T ## _MASK) >> INTEL_GUC_MSG_ ## T ## _SHIFT)
-#define INTEL_GUC_MSG_TO_TYPE(m)	__INTEL_GUC_MSG_GET(TYPE, m)
-#define INTEL_GUC_MSG_TO_DATA(m)	__INTEL_GUC_MSG_GET(DATA, m)
-#define INTEL_GUC_MSG_TO_CODE(m)	__INTEL_GUC_MSG_GET(CODE, m)
-
-#define __INTEL_GUC_MSG_TYPE_IS(T, m) \
-	(INTEL_GUC_MSG_TO_TYPE(m) == INTEL_GUC_MSG_TYPE_ ## T)
-#define INTEL_GUC_MSG_IS_REQUEST(m)	__INTEL_GUC_MSG_TYPE_IS(REQUEST, m)
-#define INTEL_GUC_MSG_IS_RESPONSE(m)	__INTEL_GUC_MSG_TYPE_IS(RESPONSE, m)
-
-#define INTEL_GUC_MSG_IS_RESPONSE_SUCCESS(m) \
-	 (typecheck(u32, (m)) && \
-	  ((m) & (INTEL_GUC_MSG_TYPE_MASK | INTEL_GUC_MSG_CODE_MASK)) == \
-	  ((INTEL_GUC_MSG_TYPE_RESPONSE << INTEL_GUC_MSG_TYPE_SHIFT) | \
-	   (INTEL_GUC_RESPONSE_STATUS_SUCCESS << INTEL_GUC_MSG_CODE_SHIFT)))
-
 /* This action will be programmed in C1BC - SOFT_SCRATCH_15_REG */
 enum intel_guc_recv_message {
 	INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED = BIT(1),

drivers/gpu/drm/i915/gt/uc/intel_guc_log.c

@@ -197,10 +197,8 @@ static bool guc_check_log_buf_overflow(struct intel_guc_log *log,
 static unsigned int guc_get_log_buffer_size(enum guc_log_buffer_type type)
 {
 	switch (type) {
-	case GUC_ISR_LOG_BUFFER:
-		return ISR_BUFFER_SIZE;
-	case GUC_DPC_LOG_BUFFER:
-		return DPC_BUFFER_SIZE;
+	case GUC_DEBUG_LOG_BUFFER:
+		return DEBUG_BUFFER_SIZE;
 	case GUC_CRASH_DUMP_LOG_BUFFER:
 		return CRASH_BUFFER_SIZE;
 	default:
@@ -245,7 +243,7 @@ static void guc_read_update_log_buffer(struct intel_guc_log *log)
 	src_data += PAGE_SIZE;
 	dst_data += PAGE_SIZE;
 
-	for (type = GUC_ISR_LOG_BUFFER; type < GUC_MAX_LOG_BUFFER; type++) {
+	for (type = GUC_DEBUG_LOG_BUFFER; type < GUC_MAX_LOG_BUFFER; type++) {
 		/*
 		 * Make a copy of the state structure, inside GuC log buffer
 		 * (which is uncached mapped), on the stack to avoid reading
@@ -463,21 +461,16 @@ int intel_guc_log_create(struct intel_guc_log *log)
 	 *  +===============================+ 00B
 	 *  |    Crash dump state header    |
 	 *  +-------------------------------+ 32B
-	 *  |       DPC state header        |
+	 *  |      Debug state header       |
 	 *  +-------------------------------+ 64B
-	 *  |       ISR state header        |
-	 *  +-------------------------------+ 96B
 	 *  |                               |
 	 *  +===============================+ PAGE_SIZE (4KB)
 	 *  |        Crash Dump logs        |
 	 *  +===============================+ + CRASH_SIZE
-	 *  |           DPC logs            |
-	 *  +===============================+ + DPC_SIZE
-	 *  |           ISR logs            |
-	 *  +===============================+ + ISR_SIZE
+	 *  |          Debug logs           |
+	 *  +===============================+ + DEBUG_SIZE
 	 */
-	guc_log_size = PAGE_SIZE + CRASH_BUFFER_SIZE + DPC_BUFFER_SIZE +
-			ISR_BUFFER_SIZE;
+	guc_log_size = PAGE_SIZE + CRASH_BUFFER_SIZE + DEBUG_BUFFER_SIZE;
 
 	vma = intel_guc_allocate_vma(guc, guc_log_size);
 	if (IS_ERR(vma)) {
@@ -675,10 +668,8 @@ static const char *
 stringify_guc_log_type(enum guc_log_buffer_type type)
 {
 	switch (type) {
-	case GUC_ISR_LOG_BUFFER:
-		return "ISR";
-	case GUC_DPC_LOG_BUFFER:
-		return "DPC";
+	case GUC_DEBUG_LOG_BUFFER:
+		return "DEBUG";
 	case GUC_CRASH_DUMP_LOG_BUFFER:
 		return "CRASH";
 	default:
@@ -708,7 +699,7 @@ void intel_guc_log_info(struct intel_guc_log *log, struct drm_printer *p)
 
 	drm_printf(p, "\tRelay full count: %u\n", log->relay.full_count);
 
-	for (type = GUC_ISR_LOG_BUFFER; type < GUC_MAX_LOG_BUFFER; type++) {
+	for (type = GUC_DEBUG_LOG_BUFFER; type < GUC_MAX_LOG_BUFFER; type++) {
 		drm_printf(p, "\t%s:\tflush count %10u, overflow count %10u\n",
 			   stringify_guc_log_type(type),
 			   log->stats[type].flush,

drivers/gpu/drm/i915/gt/uc/intel_guc_log.h

@@ -17,12 +17,10 @@ struct intel_guc;
 
 #ifdef CONFIG_DRM_I915_DEBUG_GUC
 #define CRASH_BUFFER_SIZE	SZ_2M
-#define DPC_BUFFER_SIZE		SZ_8M
-#define ISR_BUFFER_SIZE		SZ_8M
+#define DEBUG_BUFFER_SIZE	SZ_16M
 #else
 #define CRASH_BUFFER_SIZE	SZ_8K
-#define DPC_BUFFER_SIZE		SZ_32K
-#define ISR_BUFFER_SIZE		SZ_32K
+#define DEBUG_BUFFER_SIZE	SZ_64K
 #endif
 
 /*

drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c

@@ -48,19 +48,19 @@ void intel_uc_fw_change_status(struct intel_uc_fw *uc_fw,
  * firmware as TGL.
  */
 #define INTEL_UC_FIRMWARE_DEFS(fw_def, guc_def, huc_def) \
-	fw_def(ALDERLAKE_S, 0, guc_def(tgl, 49, 0, 1), huc_def(tgl,  7, 5, 0)) \
-	fw_def(ROCKETLAKE,  0, guc_def(tgl, 49, 0, 1), huc_def(tgl,  7, 5, 0)) \
-	fw_def(TIGERLAKE,   0, guc_def(tgl, 49, 0, 1), huc_def(tgl,  7, 5, 0)) \
-	fw_def(JASPERLAKE,  0, guc_def(ehl, 49, 0, 1), huc_def(ehl,  9, 0, 0)) \
-	fw_def(ELKHARTLAKE, 0, guc_def(ehl, 49, 0, 1), huc_def(ehl,  9, 0, 0)) \
-	fw_def(ICELAKE,     0, guc_def(icl, 49, 0, 1), huc_def(icl,  9, 0, 0)) \
-	fw_def(COMETLAKE,   5, guc_def(cml, 49, 0, 1), huc_def(cml,  4, 0, 0)) \
-	fw_def(COMETLAKE,   0, guc_def(kbl, 49, 0, 1), huc_def(kbl,  4, 0, 0)) \
-	fw_def(COFFEELAKE,  0, guc_def(kbl, 49, 0, 1), huc_def(kbl,  4, 0, 0)) \
-	fw_def(GEMINILAKE,  0, guc_def(glk, 49, 0, 1), huc_def(glk,  4, 0, 0)) \
-	fw_def(KABYLAKE,    0, guc_def(kbl, 49, 0, 1), huc_def(kbl,  4, 0, 0)) \
-	fw_def(BROXTON,     0, guc_def(bxt, 49, 0, 1), huc_def(bxt,  2, 0, 0)) \
-	fw_def(SKYLAKE,     0, guc_def(skl, 49, 0, 1), huc_def(skl,  2, 0, 0))
+	fw_def(ALDERLAKE_S, 0, guc_def(tgl, 62, 0, 0), huc_def(tgl,  7, 5, 0)) \
+	fw_def(ROCKETLAKE,  0, guc_def(tgl, 62, 0, 0), huc_def(tgl,  7, 5, 0)) \
+	fw_def(TIGERLAKE,   0, guc_def(tgl, 62, 0, 0), huc_def(tgl,  7, 5, 0)) \
+	fw_def(JASPERLAKE,  0, guc_def(ehl, 62, 0, 0), huc_def(ehl,  9, 0, 0)) \
+	fw_def(ELKHARTLAKE, 0, guc_def(ehl, 62, 0, 0), huc_def(ehl,  9, 0, 0)) \
+	fw_def(ICELAKE,     0, guc_def(icl, 62, 0, 0), huc_def(icl,  9, 0, 0)) \
+	fw_def(COMETLAKE,   5, guc_def(cml, 62, 0, 0), huc_def(cml,  4, 0, 0)) \
+	fw_def(COMETLAKE,   0, guc_def(kbl, 62, 0, 0), huc_def(kbl,  4, 0, 0)) \
+	fw_def(COFFEELAKE,  0, guc_def(kbl, 62, 0, 0), huc_def(kbl,  4, 0, 0)) \
+	fw_def(GEMINILAKE,  0, guc_def(glk, 62, 0, 0), huc_def(glk,  4, 0, 0)) \
+	fw_def(KABYLAKE,    0, guc_def(kbl, 62, 0, 0), huc_def(kbl,  4, 0, 0)) \
+	fw_def(BROXTON,     0, guc_def(bxt, 62, 0, 0), huc_def(bxt,  2, 0, 0)) \
+	fw_def(SKYLAKE,     0, guc_def(skl, 62, 0, 0), huc_def(skl,  2, 0, 0))
 
 #define __MAKE_UC_FW_PATH(prefix_, name_, major_, minor_, patch_) \
 	"i915/" \