Commit c66ab56a authored by Johannes Berg's avatar Johannes Berg Committed by Luca Coelho
Browse files

iwlwifi: dump host monitor data when NIC doesn't init 



If the NIC cannot be initialized, dump host monitor data
so we can analyze properly why it didn't initialize.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211024165252.21c90ba4fa5f.I2a30f62aa4685dc7623d3c69838909833c3f435c@changeid


Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
parent 3f732042

drivers/net/wireless/intel/iwlwifi/iwl-io.c

+45 −1
Original line number Diff line number Diff line
@@ -398,6 +398,47 @@ int iwl_dump_fh(struct iwl_trans *trans, char **buf) 
	return 0;

}



#define IWL_HOST_MON_BLOCK_PEMON	0x00

#define IWL_HOST_MON_BLOCK_HIPM		0x22



#define IWL_HOST_MON_BLOCK_PEMON_VEC0	0x00

#define IWL_HOST_MON_BLOCK_PEMON_VEC1	0x01

#define IWL_HOST_MON_BLOCK_PEMON_WFPM	0x06



static void iwl_dump_host_monitor_block(struct iwl_trans *trans,

					u32 block, u32 vec, u32 iter)

{

	int i;



	IWL_ERR(trans, "Host monitor block 0x%x vector 0x%x\n", block, vec);

	iwl_write32(trans, CSR_MONITOR_CFG_REG, (block << 8) | vec);

	for (i = 0; i < iter; i++)

		IWL_ERR(trans, "    value [iter %d]: 0x%08x\n",

			i, iwl_read32(trans, CSR_MONITOR_STATUS_REG));

}



static void iwl_dump_host_monitor(struct iwl_trans *trans)

{

	switch (trans->trans_cfg->device_family) {

	case IWL_DEVICE_FAMILY_22000:

	case IWL_DEVICE_FAMILY_AX210:

		IWL_ERR(trans, "CSR_RESET = 0x%x\n",

			iwl_read32(trans, CSR_RESET));

		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,

					    IWL_HOST_MON_BLOCK_PEMON_VEC0, 15);

		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,

					    IWL_HOST_MON_BLOCK_PEMON_VEC1, 15);

		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,

					    IWL_HOST_MON_BLOCK_PEMON_WFPM, 15);

		iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_HIPM,

					    IWL_HOST_MON_BLOCK_PEMON_VEC0, 1);

		break;

	default:

		/* not supported yet */

		return;

	}

}



int iwl_finish_nic_init(struct iwl_trans *trans)

{

	const struct iwl_cfg_trans_params *cfg_trans = trans->trans_cfg;
@@ -433,9 +474,12 @@ int iwl_finish_nic_init(struct iwl_trans *trans) 
	 * and accesses to uCode SRAM.

	 */

	err = iwl_poll_bit(trans, CSR_GP_CNTRL, poll_ready, poll_ready, 25000);

	if (err < 0)

	if (err < 0) {

		IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");



		iwl_dump_host_monitor(trans);

	}



	if (cfg_trans->bisr_workaround) {

		/* ensure BISR shift has finished */

		udelay(200);