1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
3 
4 #include "i40e_diag.h"
5 #include "i40e_prototype.h"
6 
7 /**
8  * i40e_diag_reg_pattern_test
9  * @hw: pointer to the hw struct
10  * @reg: reg to be tested
11  * @mask: bits to be touched
12  **/
13 static int i40e_diag_reg_pattern_test(struct i40e_hw *hw,
14 				      u32 reg, u32 mask)
15 {
16 	static const u32 patterns[] = {
17 		0x5A5A5A5A, 0xA5A5A5A5, 0x00000000, 0xFFFFFFFF
18 	};
19 	u32 pat, val, orig_val;
20 	int i;
21 
22 	orig_val = rd32(hw, reg);
23 	for (i = 0; i < ARRAY_SIZE(patterns); i++) {
24 		pat = patterns[i];
25 		wr32(hw, reg, (pat & mask));
26 		val = rd32(hw, reg);
27 		if ((val & mask) != (pat & mask)) {
28 			i40e_debug(hw, I40E_DEBUG_DIAG,
29 				   "%s: reg pattern test failed - reg 0x%08x pat 0x%08x val 0x%08x\n",
30 				   __func__, reg, pat, val);
31 			return -EIO;
32 		}
33 	}
34 
35 	wr32(hw, reg, orig_val);
36 	val = rd32(hw, reg);
37 	if (val != orig_val) {
38 		i40e_debug(hw, I40E_DEBUG_DIAG,
39 			   "%s: reg restore test failed - reg 0x%08x orig_val 0x%08x val 0x%08x\n",
40 			   __func__, reg, orig_val, val);
41 		return -EIO;
42 	}
43 
44 	return 0;
45 }
46 
47 const struct i40e_diag_reg_test_info i40e_reg_list[] = {
48 	/* offset               mask         elements   stride */
49 	{I40E_QTX_CTL(0),       0x0000FFBF, 1,
50 		I40E_QTX_CTL(1) - I40E_QTX_CTL(0)},
51 	{I40E_PFINT_ITR0(0),    0x00000FFF, 3,
52 		I40E_PFINT_ITR0(1) - I40E_PFINT_ITR0(0)},
53 	{I40E_PFINT_ITRN(0, 0), 0x00000FFF, 1,
54 		I40E_PFINT_ITRN(0, 1) - I40E_PFINT_ITRN(0, 0)},
55 	{I40E_PFINT_ITRN(1, 0), 0x00000FFF, 1,
56 		I40E_PFINT_ITRN(1, 1) - I40E_PFINT_ITRN(1, 0)},
57 	{I40E_PFINT_ITRN(2, 0), 0x00000FFF, 1,
58 		I40E_PFINT_ITRN(2, 1) - I40E_PFINT_ITRN(2, 0)},
59 	{I40E_PFINT_STAT_CTL0,  0x0000000C, 1, 0},
60 	{I40E_PFINT_LNKLST0,    0x00001FFF, 1, 0},
61 	{I40E_PFINT_LNKLSTN(0), 0x000007FF, 1,
62 		I40E_PFINT_LNKLSTN(1) - I40E_PFINT_LNKLSTN(0)},
63 	{I40E_QINT_TQCTL(0),    0x000000FF, 1,
64 		I40E_QINT_TQCTL(1) - I40E_QINT_TQCTL(0)},
65 	{I40E_QINT_RQCTL(0),    0x000000FF, 1,
66 		I40E_QINT_RQCTL(1) - I40E_QINT_RQCTL(0)},
67 	{I40E_PFINT_ICR0_ENA,   0xF7F20000, 1, 0},
68 	{ 0 }
69 };
70 
71 /**
72  * i40e_diag_reg_test
73  * @hw: pointer to the hw struct
74  *
75  * Perform registers diagnostic test
76  **/
77 int i40e_diag_reg_test(struct i40e_hw *hw)
78 {
79 	int ret_code = 0;
80 	u32 reg, mask;
81 	u32 elements;
82 	u32 i, j;
83 
84 	for (i = 0; i40e_reg_list[i].offset != 0 &&
85 					     !ret_code; i++) {
86 
87 		elements = i40e_reg_list[i].elements;
88 		/* set actual reg range for dynamically allocated resources */
89 		if (i40e_reg_list[i].offset == I40E_QTX_CTL(0) &&
90 		    hw->func_caps.num_tx_qp != 0)
91 			elements = hw->func_caps.num_tx_qp;
92 		if ((i40e_reg_list[i].offset == I40E_PFINT_ITRN(0, 0) ||
93 		     i40e_reg_list[i].offset == I40E_PFINT_ITRN(1, 0) ||
94 		     i40e_reg_list[i].offset == I40E_PFINT_ITRN(2, 0) ||
95 		     i40e_reg_list[i].offset == I40E_QINT_TQCTL(0) ||
96 		     i40e_reg_list[i].offset == I40E_QINT_RQCTL(0)) &&
97 		    hw->func_caps.num_msix_vectors != 0)
98 			elements = hw->func_caps.num_msix_vectors - 1;
99 
100 		/* test register access */
101 		mask = i40e_reg_list[i].mask;
102 		for (j = 0; j < elements && !ret_code; j++) {
103 			reg = i40e_reg_list[i].offset +
104 			      (j * i40e_reg_list[i].stride);
105 			ret_code = i40e_diag_reg_pattern_test(hw, reg, mask);
106 		}
107 	}
108 
109 	return ret_code;
110 }
111 
112 /**
113  * i40e_diag_eeprom_test
114  * @hw: pointer to the hw struct
115  *
116  * Perform EEPROM diagnostic test
117  **/
118 int i40e_diag_eeprom_test(struct i40e_hw *hw)
119 {
120 	int ret_code;
121 	u16 reg_val;
122 
123 	/* read NVM control word and if NVM valid, validate EEPROM checksum*/
124 	ret_code = i40e_read_nvm_word(hw, I40E_SR_NVM_CONTROL_WORD, &reg_val);
125 	if (!ret_code &&
126 	    ((reg_val & I40E_SR_CONTROL_WORD_1_MASK) ==
127 	     BIT(I40E_SR_CONTROL_WORD_1_SHIFT)))
128 		return i40e_validate_nvm_checksum(hw, NULL);
129 	else
130 		return -EIO;
131 }
132