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Thu, 6 Jun 2024 10:00:16 +0000 Received: from KL1PR0601MB4891.apcprd06.prod.outlook.com ([fe80::8950:42de:2354:91b2]) by KL1PR0601MB4891.apcprd06.prod.outlook.com ([fe80::8950:42de:2354:91b2%7]) with mapi id 15.20.7633.033; Thu, 6 Jun 2024 10:00:15 +0000 From: "Andrew.Yuan" To: luc.michel@amd.com, edgar.iglesias@gmail.com, alistair@alistair23.me, peter.maydell@linaro.org, jasowang@redhat.com Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org, "Andrew.Yuan" Subject: [PATCH] hw/net: cadence_gem: fix: type2_compare_x_word_0 error Date: Thu, 6 Jun 2024 17:59:52 +0800 Message-Id: <20240606095952.2133-1-andrew.yuan@jaguarmicro.com> X-Mailer: git-send-email 2.37.0.windows.1 X-ClientProxiedBy: SI2PR06CA0014.apcprd06.prod.outlook.com (2603:1096:4:186::11) To KL1PR0601MB4891.apcprd06.prod.outlook.com (2603:1096:820:ae::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: KL1PR0601MB4891:EE_|PUZPR06MB5433:EE_ X-MS-Office365-Filtering-Correlation-Id: 79126536-ceff-43d0-280a-08dc860f7695 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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envelope-from=andrew.yuan@jaguarmicro.com; helo=SINPR02CU002.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 06 Jun 2024 11:29:14 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org In the Cadence IP for Gigabit Ethernet MAC Part Number: IP7014 IP Rev: R1p12 - Doc Rev: 1.3 User Guide, the specification for the type2_compare_x_word_0 register is as follows: The byte stored in bits [23:16] is compared against the byte in the received frame from the selected offset+0, and the byte stored in bits [31:24] is compared against the byte in the received frame from the selected offset+1. However, there is an implementation error in the cadence_gem model in qemu： the byte stored in bits [31:24] is compared against the byte in the received frame from the selected offset+0 Now, the error code is as follows: rx_cmp = rxbuf_ptr[offset] << 8 | rxbuf_ptr[offset]; and needs to be corrected to： rx_cmp = rxbuf_ptr[offset + 1] << 8 | rxbuf_ptr[offset]; Signed-off-by: Andrew.Yuan --- hw/net/cadence_gem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c index ec7bf562e5..9c73ded0d3 100644 --- a/hw/net/cadence_gem.c +++ b/hw/net/cadence_gem.c @@ -946,7 +946,7 @@ static int get_queue_from_screen(CadenceGEMState *s, uint8_t *rxbuf_ptr, break; } - rx_cmp = rxbuf_ptr[offset] << 8 | rxbuf_ptr[offset]; + rx_cmp = rxbuf_ptr[offset + 1] << 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);