drivers/net/ethernet/intel/i40e/i40e_diag.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */

#include "i40e_diag.h"
#include "i40e_prototype.h"

/**
 * i40e_diag_reg_pattern_test
 * @hw: pointer to the hw struct
 * @reg: reg to be tested
 * @mask: bits to be touched
 **/
static int i40e_diag_reg_pattern_test(struct i40e_hw *hw,
				      u32 reg, u32 mask)
{
	static const u32 patterns[] = {
		0x5A5A5A5A, 0xA5A5A5A5, 0x00000000, 0xFFFFFFFF
	};
	u32 pat, val, orig_val;
	int i;

	orig_val = rd32(hw, reg);
	for (i = 0; i < ARRAY_SIZE(patterns); i++) {
		pat = patterns[i];
		wr32(hw, reg, (pat & mask));
		val = rd32(hw, reg);
		if ((val & mask) != (pat & mask)) {
			i40e_debug(hw, I40E_DEBUG_DIAG,
				   "%s: reg pattern test failed - reg 0x%08x pat 0x%08x val 0x%08x\n",
				   __func__, reg, pat, val);
			return -EIO;
		}
	}

	wr32(hw, reg, orig_val);
	val = rd32(hw, reg);
	if (val != orig_val) {
		i40e_debug(hw, I40E_DEBUG_DIAG,
			   "%s: reg restore test failed - reg 0x%08x orig_val 0x%08x val 0x%08x\n",
			   __func__, reg, orig_val, val);
		return -EIO;
	}

	return 0;
}

const struct i40e_diag_reg_test_info i40e_reg_list[] = {
	/* offset               mask         elements   stride */
	{I40E_QTX_CTL(0),       0x0000FFBF, 1,
		I40E_QTX_CTL(1) - I40E_QTX_CTL(0)},
	{I40E_PFINT_ITR0(0),    0x00000FFF, 3,
		I40E_PFINT_ITR0(1) - I40E_PFINT_ITR0(0)},
	{I40E_PFINT_ITRN(0, 0), 0x00000FFF, 1,
		I40E_PFINT_ITRN(0, 1) - I40E_PFINT_ITRN(0, 0)},
	{I40E_PFINT_ITRN(1, 0), 0x00000FFF, 1,
		I40E_PFINT_ITRN(1, 1) - I40E_PFINT_ITRN(1, 0)},
	{I40E_PFINT_ITRN(2, 0), 0x00000FFF, 1,
		I40E_PFINT_ITRN(2, 1) - I40E_PFINT_ITRN(2, 0)},
	{I40E_PFINT_STAT_CTL0,  0x0000000C, 1, 0},
	{I40E_PFINT_LNKLST0,    0x00001FFF, 1, 0},
	{I40E_PFINT_LNKLSTN(0), 0x000007FF, 1,
		I40E_PFINT_LNKLSTN(1) - I40E_PFINT_LNKLSTN(0)},
	{I40E_QINT_TQCTL(0),    0x000000FF, 1,
		I40E_QINT_TQCTL(1) - I40E_QINT_TQCTL(0)},
	{I40E_QINT_RQCTL(0),    0x000000FF, 1,
		I40E_QINT_RQCTL(1) - I40E_QINT_RQCTL(0)},
	{I40E_PFINT_ICR0_ENA,   0xF7F20000, 1, 0},
	{ 0 }
};

/**
 * i40e_diag_reg_test
 * @hw: pointer to the hw struct
 *
 * Perform registers diagnostic test
 **/
int i40e_diag_reg_test(struct i40e_hw *hw)
{
	int ret_code = 0;
	u32 reg, mask;
	u32 elements;
	u32 i, j;

	for (i = 0; i40e_reg_list[i].offset != 0 &&
					     !ret_code; i++) {

		elements = i40e_reg_list[i].elements;
		/* set actual reg range for dynamically allocated resources */
		if (i40e_reg_list[i].offset == I40E_QTX_CTL(0) &&
		    hw->func_caps.num_tx_qp != 0)
			elements = hw->func_caps.num_tx_qp;
		if ((i40e_reg_list[i].offset == I40E_PFINT_ITRN(0, 0) ||
		     i40e_reg_list[i].offset == I40E_PFINT_ITRN(1, 0) ||
		     i40e_reg_list[i].offset == I40E_PFINT_ITRN(2, 0) ||
		     i40e_reg_list[i].offset == I40E_QINT_TQCTL(0) ||
		     i40e_reg_list[i].offset == I40E_QINT_RQCTL(0)) &&
		    hw->func_caps.num_msix_vectors != 0)
			elements = hw->func_caps.num_msix_vectors - 1;

		/* test register access */
		mask = i40e_reg_list[i].mask;
		for (j = 0; j < elements && !ret_code; j++) {
			reg = i40e_reg_list[i].offset +
			      (j * i40e_reg_list[i].stride);
			ret_code = i40e_diag_reg_pattern_test(hw, reg, mask);
		}
	}

	return ret_code;
}

/**
 * i40e_diag_eeprom_test
 * @hw: pointer to the hw struct
 *
 * Perform EEPROM diagnostic test
 **/
int i40e_diag_eeprom_test(struct i40e_hw *hw)
{
	int ret_code;
	u16 reg_val;

	/* read NVM control word and if NVM valid, validate EEPROM checksum*/
	ret_code = i40e_read_nvm_word(hw, I40E_SR_NVM_CONTROL_WORD, &reg_val);
	if (!ret_code &&
	    ((reg_val & I40E_SR_CONTROL_WORD_1_MASK) ==
	     BIT(I40E_SR_CONTROL_WORD_1_SHIFT)))
		return i40e_validate_nvm_checksum(hw, NULL);
	else
		return -EIO;
}