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Commit 7823fe34 authored by Shannon Nelson's avatar Shannon Nelson Committed by Jeff Kirsher
Browse files

i40e: add support for triggering EMPR 



Allow debugfs to trigger a reset called EMPR.

Change-Id: I2f6600a8242759ec60c8198d03f70c2b774e0740
Signed-off-by: default avatarShannon Nelson <shannon.nelson@intel.com>
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: default avatarKavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent cd92e72f

drivers/net/ethernet/intel/i40e/i40e.h

+1 −0
Original line number Diff line number Diff line
@@ -130,6 +130,7 @@ enum i40e_state_t { 
	__I40E_PF_RESET_REQUESTED,

	__I40E_CORE_RESET_REQUESTED,

	__I40E_GLOBAL_RESET_REQUESTED,

	__I40E_EMP_RESET_REQUESTED,

	__I40E_FILTER_OVERFLOW_PROMISC,

};

drivers/net/ethernet/intel/i40e/i40e_debugfs.c

+4 −0
Original line number Diff line number Diff line
@@ -1472,6 +1472,10 @@ static ssize_t i40e_dbg_command_write(struct file *filp, 
		dev_info(&pf->pdev->dev, "forcing GlobR\n");

		i40e_do_reset(pf, (1 << __I40E_GLOBAL_RESET_REQUESTED));



	} else if (strncmp(cmd_buf, "empr", 4) == 0) {

		dev_info(&pf->pdev->dev, "forcing EMPR\n");

		i40e_do_reset(pf, (1 << __I40E_EMP_RESET_REQUESTED));



	} else if (strncmp(cmd_buf, "read", 4) == 0) {

		u32 address;

		u32 value;

drivers/net/ethernet/intel/i40e/i40e_main.c

+18 −0
Original line number Diff line number Diff line
@@ -4056,6 +4056,24 @@ void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags) 
		wr32(&pf->hw, I40E_GLGEN_RTRIG, val);

		i40e_flush(&pf->hw);



	} else if (reset_flags & (1 << __I40E_EMP_RESET_REQUESTED)) {



		/* Request a Firmware Reset

		 *

		 * Same as Global reset, plus restarting the

		 * embedded firmware engine.

		 */

		/* enable EMP Reset */

		val = rd32(&pf->hw, I40E_GLGEN_RSTENA_EMP);

		val |= I40E_GLGEN_RSTENA_EMP_EMP_RST_ENA_MASK;

		wr32(&pf->hw, I40E_GLGEN_RSTENA_EMP, val);



		/* force the reset */

		val = rd32(&pf->hw, I40E_GLGEN_RTRIG);

		val |= I40E_GLGEN_RTRIG_EMPFWR_MASK;

		wr32(&pf->hw, I40E_GLGEN_RTRIG, val);

		i40e_flush(&pf->hw);



	} else if (reset_flags & (1 << __I40E_PF_RESET_REQUESTED)) {



		/* Request a PF Reset