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Iglesias" To: qemu-devel@nongnu.org Subject: [PULL v1 06/14] hw/net/xilinx_axienet: Handle fragmented packets from DMA Date: Thu, 14 May 2020 16:13:54 +0200 Message-Id: <20200514141402.12498-7-edgar.iglesias@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200514141402.12498-1-edgar.iglesias@gmail.com> References: <20200514141402.12498-1-edgar.iglesias@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::141; envelope-from=edgar.iglesias@gmail.com; helo=mail-lf1-x141.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: 13 X-Spam_score: 1.3 X-Spam_bar: + X-Spam_report: (1.3 / 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, FREEMAIL_FROM=0.001, FSL_HELO_FAKE=3.399, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: edgar.iglesias@xilinx.com, peter.maydell@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: "Edgar E. Iglesias" Add support for fragmented packets from the DMA. Reviewed-by: Francisco Iglesias Signed-off-by: Edgar E. Iglesias Message-Id: <20200506082513.18751-7-edgar.iglesias@gmail.com> --- hw/net/xilinx_axienet.c | 38 +++++++++++++++++++++++++++++++------- 1 file changed, 31 insertions(+), 7 deletions(-) diff --git a/hw/net/xilinx_axienet.c b/hw/net/xilinx_axienet.c index bd48305577..498afe2f54 100644 --- a/hw/net/xilinx_axienet.c +++ b/hw/net/xilinx_axienet.c @@ -402,6 +402,9 @@ struct XilinxAXIEnet { =20 uint32_t hdr[CONTROL_PAYLOAD_WORDS]; =20 + uint8_t *txmem; + uint32_t txpos; + uint8_t *rxmem; uint32_t rxsize; uint32_t rxpos; @@ -421,6 +424,7 @@ static void axienet_rx_reset(XilinxAXIEnet *s) static void axienet_tx_reset(XilinxAXIEnet *s) { s->tc =3D TC_JUM | TC_TX | TC_VLAN; + s->txpos =3D 0; } =20 static inline int axienet_rx_resetting(XilinxAXIEnet *s) @@ -902,17 +906,35 @@ xilinx_axienet_data_stream_push(StreamSlave *obj, uin= t8_t *buf, size_t size, XilinxAXIEnetStreamSlave *ds =3D XILINX_AXI_ENET_DATA_STREAM(obj); XilinxAXIEnet *s =3D ds->enet; =20 - /* We don't support fragmented packets yet. */ - assert(eop); - /* TX enable ? */ if (!(s->tc & TC_TX)) { return size; } =20 + if (s->txpos + size > s->c_txmem) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: Packet larger than txmem\n", + TYPE_XILINX_AXI_ENET); + s->txpos =3D 0; + return size; + } + + if (s->txpos =3D=3D 0 && eop) { + /* Fast path single fragment. */ + s->txpos =3D size; + } else { + memcpy(s->txmem + s->txpos, buf, size); + buf =3D s->txmem; + s->txpos +=3D size; + + if (!eop) { + return size; + } + } + /* Jumbo or vlan sizes ? */ if (!(s->tc & TC_JUM)) { - if (size > 1518 && size <=3D 1522 && !(s->tc & TC_VLAN)) { + if (s->txpos > 1518 && s->txpos <=3D 1522 && !(s->tc & TC_VLAN)) { + s->txpos =3D 0; return size; } } @@ -923,7 +945,7 @@ xilinx_axienet_data_stream_push(StreamSlave *obj, uint8= _t *buf, size_t size, uint32_t tmp_csum; uint16_t csum; =20 - tmp_csum =3D net_checksum_add(size - start_off, + tmp_csum =3D net_checksum_add(s->txpos - start_off, buf + start_off); /* Accumulate the seed. */ tmp_csum +=3D s->hdr[2] & 0xffff; @@ -936,12 +958,13 @@ xilinx_axienet_data_stream_push(StreamSlave *obj, uin= t8_t *buf, size_t size, buf[write_off + 1] =3D csum & 0xff; } =20 - qemu_send_packet(qemu_get_queue(s->nic), buf, size); + qemu_send_packet(qemu_get_queue(s->nic), buf, s->txpos); =20 - s->stats.tx_bytes +=3D size; + s->stats.tx_bytes +=3D s->txpos; s->regs[R_IS] |=3D IS_TX_COMPLETE; enet_update_irq(s); =20 + s->txpos =3D 0; return size; } =20 @@ -989,6 +1012,7 @@ static void xilinx_enet_realize(DeviceState *dev, Erro= r **errp) s->TEMAC.parent =3D s; =20 s->rxmem =3D g_malloc(s->c_rxmem); + s->txmem =3D g_malloc(s->c_txmem); return; =20 xilinx_enet_realize_fail: --=20 2.20.1