iwlwifi: yoyo: support dump policy for the dump size

Support dump size limitation based on the TLV by firmware.
This is needed for limited memory systems so only the most
important dumps are sent by driver.
Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220210181930.d7e1ff264766.If2327fd890a453cdc9069d26220394d0b4e79743@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/api/dbg-tlv.h

@@ -11,7 +11,8 @@
 #define IWL_FW_INI_MAX_NAME			32
 #define IWL_FW_INI_MAX_CFG_NAME			64
 #define IWL_FW_INI_DOMAIN_ALWAYS_ON		0
-#define IWL_FW_INI_REGION_V2_MASK		0x0000FFFF
+#define IWL_FW_INI_REGION_ID_MASK		GENMASK(15, 0)
+#define IWL_FW_INI_REGION_DUMP_POLICY_MASK	GENMASK(31, 16)
 
 /**
  * struct iwl_fw_ini_hcmd
@@ -495,4 +496,31 @@ enum iwl_fw_ini_trigger_reset_fw_policy {
 	IWL_FW_INI_RESET_FW_MODE_STOP_FW_ONLY,
 	IWL_FW_INI_RESET_FW_MODE_STOP_AND_RELOAD_FW
 };
+
+/**
+ * enum iwl_fw_ini_dump_policy - Determines how to handle dump based on enabled flags
+ *
+ * @IWL_FW_INI_DEBUG_DUMP_POLICY_NO_LIMIT: OS has no limit of dump size
+ * @IWL_FW_INI_DEBUG_DUMP_POLICY_MAX_LIMIT_600KB: mini dump only 600KB region dump
+ * @IWL_FW_IWL_DEBUG_DUMP_POLICY_MAX_LIMIT_5MB: mini dump 5MB size dump
+ */
+enum iwl_fw_ini_dump_policy {
+	IWL_FW_INI_DEBUG_DUMP_POLICY_NO_LIMIT           = BIT(0),
+	IWL_FW_INI_DEBUG_DUMP_POLICY_MAX_LIMIT_600KB    = BIT(1),
+	IWL_FW_IWL_DEBUG_DUMP_POLICY_MAX_LIMIT_5MB      = BIT(2),
+
+};
+
+/**
+ * enum iwl_fw_ini_dump_type - Determines dump type based on size defined by FW.
+ *
+ * @IWL_FW_INI_DUMP_BRIEF : only dump the most important regions
+ * @IWL_FW_INI_DEBUG_MEDIUM: dump more regions than "brief", but not all regions
+ * @IWL_FW_INI_DUMP_VERBOSE : dump all regions
+ */
+enum iwl_fw_ini_dump_type {
+	IWL_FW_INI_DUMP_BRIEF,
+	IWL_FW_INI_DUMP_MEDIUM,
+	IWL_FW_INI_DUMP_VERBOSE,
+};
 #endif

drivers/net/wireless/intel/iwlwifi/fw/dbg.c

@@ -2096,21 +2096,40 @@ static u32 iwl_dump_ini_mem(struct iwl_fw_runtime *fwrt, struct list_head *list,
 	struct iwl_fw_ini_error_dump_data *tlv;
 	struct iwl_fw_ini_error_dump_header *header;
 	u32 type = reg->type;
-	u32 id = le32_to_cpu(reg->id);
+	u32 id = le32_get_bits(reg->id, IWL_FW_INI_REGION_ID_MASK);
 	u32 num_of_ranges, i, size;
 	u8 *range;
 	u32 free_size;
 	u64 header_size;
+	u32 dump_policy = IWL_FW_INI_DUMP_VERBOSE;
 
-	/*
-	 * The higher part of the ID from 2 is irrelevant for
-	 * us, so mask it out.
-	 */
-	if (le32_to_cpu(reg->hdr.version) >= 2)
-		id &= IWL_FW_INI_REGION_V2_MASK;
+	IWL_DEBUG_FW(fwrt, "WRT: Collecting region: dump type=%d, id=%d, type=%d\n",
+		     dump_policy, id, type);
 
-	IWL_DEBUG_FW(fwrt, "WRT: Collecting region: id=%d, type=%d\n", id,
-		     type);
+	if (le32_to_cpu(reg->hdr.version) >= 2) {
+		u32 dp = le32_get_bits(reg->id,
+				       IWL_FW_INI_REGION_DUMP_POLICY_MASK);
+
+		if (dump_policy == IWL_FW_INI_DUMP_VERBOSE &&
+		    !(dp & IWL_FW_INI_DEBUG_DUMP_POLICY_NO_LIMIT)) {
+			IWL_DEBUG_FW(fwrt,
+				     "WRT: no dump - type %d and policy mismatch=%d\n",
+				     dump_policy, dp);
+			return 0;
+		} else if (dump_policy == IWL_FW_INI_DUMP_MEDIUM &&
+			   !(dp & IWL_FW_IWL_DEBUG_DUMP_POLICY_MAX_LIMIT_5MB)) {
+			IWL_DEBUG_FW(fwrt,
+				     "WRT: no dump - type %d and policy mismatch=%d\n",
+				     dump_policy, dp);
+			return 0;
+		} else if (dump_policy == IWL_FW_INI_DUMP_BRIEF &&
+			   !(dp & IWL_FW_INI_DEBUG_DUMP_POLICY_MAX_LIMIT_600KB)) {
+			IWL_DEBUG_FW(fwrt,
+				     "WRT: no dump - type %d and policy mismatch=%d\n",
+				     dump_policy, dp);
+			return 0;
+		}
+	}
 
 	if (!ops->get_num_of_ranges || !ops->get_size || !ops->fill_mem_hdr ||
 	    !ops->fill_range) {

drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright (C) 2018-2021 Intel Corporation
+ * Copyright (C) 2018-2022 Intel Corporation
  */
 #include <linux/firmware.h>
 #include "iwl-drv.h"
@@ -181,11 +181,11 @@ static int iwl_dbg_tlv_alloc_region(struct iwl_trans *trans,
 	u32 tlv_len = sizeof(*tlv) + le32_to_cpu(tlv->length);
 
 	/*
-	 * The higher part of the ID in from version 2 is irrelevant for
-	 * us, so mask it out.
+	 * The higher part of the ID from version 2 is debug policy.
+	 * The id will be only lsb 16 bits, so mask it out.
 	 */
 	if (le32_to_cpu(reg->hdr.version) >= 2)
-		id &= IWL_FW_INI_REGION_V2_MASK;
+		id &= IWL_FW_INI_REGION_ID_MASK;
 
 	if (le32_to_cpu(tlv->length) < sizeof(*reg))
 		return -EINVAL;