iwlwifi: dbg: remove unsupported regions

In case user requested to register an unsupported regions,
remove it from active list and trigger list, this saves operational
driver memory and run time at collecting debug data.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210210142629.a0cc944040e8.I3ae37547452b39f8040428c21ed47bdc67ae8f71@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

3 files changed, 40 insertions, 3 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index 1fdf80f154da..e87329265876 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2073,7 +2073,8 @@ static u32 iwl_dump_ini_info(struct iwl_fw_runtime *fwrt,
 	dump->umac_minor = cpu_to_le32(fwrt->dump.fw_ver.umac_minor);
 
 	dump->fw_mon_mode = cpu_to_le32(fwrt->trans->dbg.ini_dest);
-	dump->regions_mask = trigger->regions_mask;
+	dump->regions_mask = trigger->regions_mask &
+			     ~cpu_to_le64(fwrt->trans->dbg.unsupported_region_msk);
 
 	dump->build_tag_len = cpu_to_le32(sizeof(dump->build_tag));
 	memcpy(dump->build_tag, fwrt->fw->human_readable,
@@ -2202,7 +2203,8 @@ static u32 iwl_dump_ini_trigger(struct iwl_fw_runtime *fwrt,
 	};
 	int i;
 	u32 size = 0;
-	u64 regions_mask = le64_to_cpu(trigger->regions_mask);
+	u64 regions_mask = le64_to_cpu(trigger->regions_mask) &
+			   ~(fwrt->trans->dbg.unsupported_region_msk);
 
 	BUILD_BUG_ON(sizeof(trigger->regions_mask) != sizeof(regions_mask));
 	BUILD_BUG_ON((sizeof(trigger->regions_mask) * BITS_PER_BYTE) <
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
index 12c49fe8608a..579bc81cc0ae 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
@@ -959,6 +959,7 @@ static void iwl_dbg_tlv_init_cfg(struct iwl_fw_runtime *fwrt)
 {
 	enum iwl_fw_ini_buffer_location *ini_dest = &fwrt->trans->dbg.ini_dest;
 	int ret, i;
+	u32 failed_alloc = 0;
 
 	if (*ini_dest != IWL_FW_INI_LOCATION_INVALID)
 		return;
@@ -990,10 +991,43 @@ static void iwl_dbg_tlv_init_cfg(struct iwl_fw_runtime *fwrt)
 			continue;
 
 		ret = iwl_dbg_tlv_alloc_fragments(fwrt, i);
-		if (ret)
+
+		if (ret) {
 			IWL_WARN(fwrt,
 				 "WRT: Failed to allocate DRAM buffer for allocation id %d, ret=%d\n",
 				 i, ret);
+			failed_alloc |= BIT(i);
+		}
+	}
+
+	if (!failed_alloc)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(fwrt->trans->dbg.active_regions) && failed_alloc; i++) {
+		struct iwl_fw_ini_region_tlv *reg;
+		struct iwl_ucode_tlv **active_reg =
+			&fwrt->trans->dbg.active_regions[i];
+		u32 reg_type;
+
+		if (!*active_reg)
+			continue;
+
+		reg = (void *)(*active_reg)->data;
+		reg_type = le32_to_cpu(reg->type);
+
+		if (reg_type != IWL_FW_INI_REGION_DRAM_BUFFER ||
+		    !(BIT(le32_to_cpu(reg->dram_alloc_id)) & failed_alloc))
+			continue;
+
+		IWL_DEBUG_FW(fwrt,
+			     "WRT: removing allocation id %d from region id %d\n",
+			     le32_to_cpu(reg->dram_alloc_id), i);
+
+		failed_alloc &= ~le32_to_cpu(reg->dram_alloc_id);
+		fwrt->trans->dbg.unsupported_region_msk |= BIT(i);
+
+		kfree(*active_reg);
+		*active_reg = NULL;
 	}
 }
 
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
index 3348d582a46c..70caee03bd1b 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
@@ -746,6 +746,7 @@ struct iwl_trans_debug {
 	bool hw_error;
 	enum iwl_fw_ini_buffer_location ini_dest;
 
+	u64 unsupported_region_msk;
 	struct iwl_ucode_tlv *active_regions[IWL_FW_INI_MAX_REGION_ID];
 	struct list_head debug_info_tlv_list;
 	struct iwl_dbg_tlv_time_point_data