diff options
Diffstat (limited to 'hw/net/cadence_gem.c')
| -rw-r--r-- | hw/net/cadence_gem.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c index f744054a6d..80fbbacc1e 100644 --- a/hw/net/cadence_gem.c +++ b/hw/net/cadence_gem.c @@ -909,8 +909,8 @@ static int get_queue_from_screen(CadenceGEMState *s, uint8_t *rxbuf_ptr, /* Compare A, B, C */ for (j = 0; j < 3; j++) { - uint32_t cr0, cr1, mask, compare; - uint16_t rx_cmp; + uint32_t cr0, cr1, mask, compare, disable_mask; + uint32_t rx_cmp; int offset; int cr_idx = extract32(reg, R_SCREENING_TYPE2_REG0_COMPARE_A_SHIFT + j * 6, R_SCREENING_TYPE2_REG0_COMPARE_A_LENGTH); @@ -946,9 +946,25 @@ static int get_queue_from_screen(CadenceGEMState *s, uint8_t *rxbuf_ptr, break; } - rx_cmp = rxbuf_ptr[offset] << 8 | rxbuf_ptr[offset]; - mask = FIELD_EX32(cr0, TYPE2_COMPARE_0_WORD_0, MASK_VALUE); - compare = FIELD_EX32(cr0, TYPE2_COMPARE_0_WORD_0, COMPARE_VALUE); + disable_mask = + FIELD_EX32(cr1, TYPE2_COMPARE_0_WORD_1, DISABLE_MASK); + if (disable_mask) { + /* + * If disable_mask is set, mask_value is used as an + * additional 2 byte Compare Value; that is equivalent + * to using the whole cr0 register as the comparison value. + * Load 32 bits of data from rx_buf, and set mask to + * all-ones so we compare all 32 bits. + */ + rx_cmp = ldl_le_p(rxbuf_ptr + offset); + mask = 0xFFFFFFFF; + compare = cr0; + } else { + rx_cmp = lduw_le_p(rxbuf_ptr + offset); + mask = FIELD_EX32(cr0, TYPE2_COMPARE_0_WORD_0, MASK_VALUE); + compare = + FIELD_EX32(cr0, TYPE2_COMPARE_0_WORD_0, COMPARE_VALUE); + } if ((rx_cmp & mask) == (compare & mask)) { matched = true; |