From nobody Wed Nov 27 00:48:54 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=google.com ARC-Seal: i=1; a=rsa-sha256; t=1703021695; cv=none; d=zohomail.com; s=zohoarc; b=VY4o7KhL13Q4+yphg2xdbBtHPX/Jy1qzdpPPtOaucfWjmN9TrRxhUg6jO05Ay6TTFTkJdmCrmsIxQvvwPwfcvxnXjkdRvL4Isc9wZqPH05EnbFQlHhToL2IXnm1zvpcF/lMO4erMqMXsvnjVZh6WB0wRgZ0DL/bZs22/gjYzpJk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1703021695; h=Content-Type:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=nPUcOfN5HzwAJp8WmouXAhQrgmJsC3qMyOMzIR1F584=; b=fpNVwqQdSYOQ6SR82w71pUtigOyeW80xtncMkTsc2g35FaNWT6e+yvFGRtQLdbygbP8bF2jC3QtCoekKNU5+57EFbCF4rVUmhzh1ASJRA8RPm28GlQbXaWUhJ76HlXYXDvWVFgmV2RXMAcATFlhK7KVhX7UFpG9dpOSSqPk/GiA= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1703021695248572.1368218901584; Tue, 19 Dec 2023 13:34:55 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rFhiu-0007ej-Ss; Tue, 19 Dec 2023 16:33:56 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <3JAyCZQwKCnciVWdcZnoZaVibjjbgZ.XjhlZhp-YZqZgijibip.jmb@flex--nabihestefan.bounces.google.com>) id 1rFhiV-0007WP-Ay for qemu-devel@nongnu.org; Tue, 19 Dec 2023 16:33:35 -0500 Received: from mail-yw1-x114a.google.com ([2607:f8b0:4864:20::114a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from <3JAyCZQwKCnciVWdcZnoZaVibjjbgZ.XjhlZhp-YZqZgijibip.jmb@flex--nabihestefan.bounces.google.com>) id 1rFhiQ-0003yq-HZ for qemu-devel@nongnu.org; Tue, 19 Dec 2023 16:33:30 -0500 Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5e781d4f993so21035697b3.1 for ; Tue, 19 Dec 2023 13:33:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1703021604; x=1703626404; darn=nongnu.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=nPUcOfN5HzwAJp8WmouXAhQrgmJsC3qMyOMzIR1F584=; b=CGsjupJlmgpS2/0jw66sY69PRXzKgMuuNdJgXQzXjpuTpEgkjkAUBDu16wdmE0aZqT Wif9Yn0XSeO306tiHTc6QUBI9mp1B4D7xC/bbP2Z1Iv1owka17UqAd54cZO5r9Q7ztJx tKnpqmTic9bNFOZpnWCZhkZZjBWPtftJJHB6m/38sjwIswFM9nwqyYVsoA8OGg1juizz ZPXS8JLXIM7oKwAdo9tHUnMF0Zy5wvO4YCWKQw/j79kKGpVwUb3blQ3Y/5tuTKWTCrAM rIQcipHvrbaICCfwj+mkXfQp/wMdgcQiFW86RlDVdIcEWvFRdeMGPI0Tf8fANBwMwIUV DQxw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703021604; x=1703626404; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=nPUcOfN5HzwAJp8WmouXAhQrgmJsC3qMyOMzIR1F584=; b=q22Z9uMV/z7dBRJdhcGZNBz9t11WwP1JQyTqLSg1AjRjuMNckVZi371B/vW2a7xP1W S2IUZ4dSOyQZ80qHndI2i5oay8tHzj/B/LvBs/WboOOpbqVJeMm+qf4SEozhhFYkfupZ nLNObbIfrpw3BedzZGfW0ELemBE1Gi/DNJEz7IA+EghPZomzXvNlGnDbrp+cWt5ojb1g rxhY26oJLLRPdPXRlQBDwxb+gEZrEQlwM8x4ivVtqbUem00PzxIPln5YtZAOKQHtxUXE F/kg2i7bP9zvh0JC9uTHy1Yw9Zz+hSs9cz5HngmXiJuX5Oh3peklBmYHz3BIZ6VI7iyr FCuA== X-Gm-Message-State: AOJu0YyBsQ2AGhNmlPd/qA8y4FmHxPDeOWVlNwKrHaRWufSGDOokhZAF p5XjkOLpXLbcXL1GyH1aYemkvQwZhYCrN+VG1U8= X-Google-Smtp-Source: AGHT+IHdBZRz1B/WETHRR8toI0SewO3fkNSRGkmPBVW3GWnCi6IZKclaAagGnoyIh25NjL6f12iujwAah74qrIEcm/k= X-Received: from nabihestefan.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:2737]) (user=nabihestefan job=sendgmr) by 2002:a25:8409:0:b0:dbc:eadd:944a with SMTP id u9-20020a258409000000b00dbceadd944amr263232ybk.13.1703021604399; Tue, 19 Dec 2023 13:33:24 -0800 (PST) Date: Tue, 19 Dec 2023 21:32:53 +0000 In-Reply-To: <20231219213255.604535-1-nabihestefan@google.com> Mime-Version: 1.0 References: <20231219213255.604535-1-nabihestefan@google.com> X-Mailer: git-send-email 2.43.0.472.g3155946c3a-goog Message-ID: <20231219213255.604535-9-nabihestefan@google.com> Subject: [PATCH v9 08/10] hw/net: GMAC Rx Implementation From: Nabih Estefan To: peter.maydell@linaro.org Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org, kfting@nuvoton.com, wuhaotsh@google.com, jasowang@redhat.com, avi.fishman@nuvoton.com, nabihestefan@google.com, kwliu@nuvoton.com, tomer.maimon@nuvoton.com, Hila.Miranda-Kuzi@nuvoton.com 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=2607:f8b0:4864:20::114a; envelope-from=3JAyCZQwKCnciVWdcZnoZaVibjjbgZ.XjhlZhp-YZqZgijibip.jmb@flex--nabihestefan.bounces.google.com; helo=mail-yw1-x114a.google.com X-Spam_score_int: -95 X-Spam_score: -9.6 X-Spam_bar: --------- X-Spam_report: (-9.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, USER_IN_DEF_DKIM_WL=-7.5 autolearn=ham autolearn_force=no X-Spam_action: no action 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @google.com) X-ZM-MESSAGEID: 1703021696049100006 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Nabih Estefan Diaz - Implementation of Receive function for packets - Implementation for reading and writing from and to descriptors in memory for Rx When RX starts, we need to flush the queued packets so that they can be received by the GMAC device. Without this it won't work with TAP NIC device. When RX descriptor list is full, it returns a DMA_STATUS for software to ha= ndle it. But there's no way to indicate the software ha handled all RX desc= riptors and the whole pipeline stalls. We do something similar to NPCM7XX EMC to handle this case. 1. Return packet size when RX descriptor is full, effectively dropping thes= e packets in such a case. 2. When software clears RX descriptor full bit, continue receiving further = packets by flushing QEMU packet queue. Signed-off-by: Hao Wu Signed-off-by: Nabih Estefan Reviewed-by: Tyrone Ting --- hw/net/npcm_gmac.c | 330 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 328 insertions(+), 2 deletions(-) diff --git a/hw/net/npcm_gmac.c b/hw/net/npcm_gmac.c index 44c4ffaff4..fe7b0421ef 100644 --- a/hw/net/npcm_gmac.c +++ b/hw/net/npcm_gmac.c @@ -23,7 +23,11 @@ #include "hw/registerfields.h" #include "hw/net/mii.h" #include "hw/net/npcm_gmac.h" +#include "linux/if_ether.h" #include "migration/vmstate.h" +#include "net/checksum.h" +#include "net/net.h" +#include "qemu/cutils.h" #include "qemu/log.h" #include "qemu/units.h" #include "sysemu/dma.h" @@ -146,6 +150,17 @@ static void gmac_phy_set_link(NPCMGMACState *gmac, boo= l active) =20 static bool gmac_can_receive(NetClientState *nc) { + NPCMGMACState *gmac =3D NPCM_GMAC(qemu_get_nic_opaque(nc)); + + /* If GMAC receive is disabled. */ + if (!(gmac->regs[R_NPCM_GMAC_MAC_CONFIG] & NPCM_GMAC_MAC_CONFIG_RX_EN)= ) { + return false; + } + + /* If GMAC DMA RX is stopped. */ + if (!(gmac->regs[R_NPCM_DMA_CONTROL] & NPCM_DMA_CONTROL_START_STOP_RX)= ) { + return false; + } return true; } =20 @@ -189,11 +204,288 @@ static void gmac_update_irq(NPCMGMACState *gmac) qemu_set_irq(gmac->irq, level); } =20 -static ssize_t gmac_receive(NetClientState *nc, const uint8_t *buf, size_t= len) +static int gmac_read_rx_desc(dma_addr_t addr, struct NPCMGMACRxDesc *desc) +{ + if (dma_memory_read(&address_space_memory, addr, desc, + sizeof(*desc), MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: Failed to read descriptor @ 0x= %" + HWADDR_PRIx "\n", __func__, addr); + return -1; + } + desc->rdes0 =3D le32_to_cpu(desc->rdes0); + desc->rdes1 =3D le32_to_cpu(desc->rdes1); + desc->rdes2 =3D le32_to_cpu(desc->rdes2); + desc->rdes3 =3D le32_to_cpu(desc->rdes3); + return 0; +} + +static int gmac_write_rx_desc(dma_addr_t addr, struct NPCMGMACRxDesc *desc) +{ + struct NPCMGMACRxDesc le_desc; + le_desc.rdes0 =3D cpu_to_le32(desc->rdes0); + le_desc.rdes1 =3D cpu_to_le32(desc->rdes1); + le_desc.rdes2 =3D cpu_to_le32(desc->rdes2); + le_desc.rdes3 =3D cpu_to_le32(desc->rdes3); + if (dma_memory_write(&address_space_memory, addr, &le_desc, + sizeof(le_desc), MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: Failed to write descriptor @ 0= x%" + HWADDR_PRIx "\n", __func__, addr); + return -1; + } + return 0; +} + +static int gmac_read_tx_desc(dma_addr_t addr, struct NPCMGMACTxDesc *desc) +{ + if (dma_memory_read(&address_space_memory, addr, desc, + sizeof(*desc), MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: Failed to read descriptor @ 0x= %" + HWADDR_PRIx "\n", __func__, addr); + return -1; + } + desc->tdes0 =3D le32_to_cpu(desc->tdes0); + desc->tdes1 =3D le32_to_cpu(desc->tdes1); + desc->tdes2 =3D le32_to_cpu(desc->tdes2); + desc->tdes3 =3D le32_to_cpu(desc->tdes3); + return 0; +} + +static int gmac_write_tx_desc(dma_addr_t addr, struct NPCMGMACTxDesc *desc) { - /* Placeholder. Function will be filled in following patches */ + struct NPCMGMACTxDesc le_desc; + le_desc.tdes0 =3D cpu_to_le32(desc->tdes0); + le_desc.tdes1 =3D cpu_to_le32(desc->tdes1); + le_desc.tdes2 =3D cpu_to_le32(desc->tdes2); + le_desc.tdes3 =3D cpu_to_le32(desc->tdes3); + if (dma_memory_write(&address_space_memory, addr, &le_desc, + sizeof(le_desc), MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: Failed to write descriptor @ 0= x%" + HWADDR_PRIx "\n", __func__, addr); + return -1; + } return 0; } +static int gmac_rx_transfer_frame_to_buffer(uint32_t rx_buf_len, + uint32_t *left_frame, + uint32_t rx_buf_addr, + bool *eof_transferred, + const uint8_t **frame_ptr, + uint16_t *transferred) +{ + uint32_t to_transfer; + /* + * Check that buffer is bigger than the frame being transfered + * If bigger then transfer only whats left of frame + * Else, fill frame with all the content possible + */ + if (rx_buf_len >=3D *left_frame) { + to_transfer =3D *left_frame; + *eof_transferred =3D true; + } else { + to_transfer =3D rx_buf_len; + } + + /* write frame part to memory */ + if (dma_memory_write(&address_space_memory, (uint64_t) rx_buf_addr, + *frame_ptr, to_transfer, MEMTXATTRS_UNSPECIFIED)) + { + return -1; + } + + /* update frame pointer and size of whats left of frame */ + *frame_ptr +=3D to_transfer; + *left_frame -=3D to_transfer; + *transferred +=3D to_transfer; + + return 0; +} + +static void gmac_dma_set_state(NPCMGMACState *gmac, int shift, uint32_t st= ate) +{ + gmac->regs[R_NPCM_DMA_STATUS] =3D deposit32(gmac->regs[R_NPCM_DMA_STAT= US], + shift, 3, state); +} + +static ssize_t gmac_receive(NetClientState *nc, const uint8_t *buf, size_t= len) +{ + /* + * Comments have steps that relate to the + * receiving process steps in pg 386 + */ + NPCMGMACState *gmac =3D NPCM_GMAC(qemu_get_nic_opaque(nc)); + uint32_t left_frame =3D len; + const uint8_t *frame_ptr =3D buf; + uint32_t desc_addr; + uint32_t rx_buf_len, rx_buf_addr; + struct NPCMGMACRxDesc rx_desc; + uint16_t transferred =3D 0; + bool eof_transferred =3D false; + + trace_npcm_gmac_packet_receive(DEVICE(gmac)->canonical_path, len); + if (!gmac_can_receive(nc)) { + qemu_log_mask(LOG_GUEST_ERROR, "GMAC Currently is not able for Rx"= ); + return -1; + } + if (!gmac->regs[R_NPCM_DMA_HOST_RX_DESC]) { + gmac->regs[R_NPCM_DMA_HOST_RX_DESC] =3D + NPCM_DMA_HOST_RX_DESC_MASK(gmac->regs[R_NPCM_DMA_RX_BASE_ADDR]= ); + } + desc_addr =3D NPCM_DMA_HOST_RX_DESC_MASK(gmac->regs[R_NPCM_DMA_HOST_RX= _DESC]); + + /* step 1 */ + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_RX_RUNNING_FETCHING_STATE); + trace_npcm_gmac_packet_desc_read(DEVICE(gmac)->canonical_path, desc_ad= dr); + if (gmac_read_rx_desc(desc_addr, &rx_desc)) { + qemu_log_mask(LOG_GUEST_ERROR, "RX Descriptor @ 0x%x cant be read\= n", + desc_addr); + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_RX_SUSPENDED_STATE); + return -1; + } + + /* step 2 */ + if (!(rx_desc.rdes0 & RX_DESC_RDES0_OWN)) { + qemu_log_mask(LOG_GUEST_ERROR, + "RX Descriptor @ 0x%x is owned by software\n", + desc_addr); + gmac->regs[R_NPCM_DMA_STATUS] |=3D NPCM_DMA_STATUS_RU; + gmac->regs[R_NPCM_DMA_STATUS] |=3D NPCM_DMA_STATUS_RI; + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_RX_SUSPENDED_STATE); + gmac_update_irq(gmac); + return len; + } + /* step 3 */ + /* + * TODO -- + * Implement all frame filtering and processing (with its own interrup= ts) + */ + trace_npcm_gmac_debug_desc_data(DEVICE(gmac)->canonical_path, &rx_desc, + rx_desc.rdes0, rx_desc.rdes1, rx_desc.= rdes2, + rx_desc.rdes3); + /* Clear rdes0 for the incoming descriptor and set FS in first descrip= tor.*/ + rx_desc.rdes0 =3D RX_DESC_RDES0_FIRST_DESC_MASK; + + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_RX_RUNNING_TRANSFERRING_STATE); + + /* Pad the frame with FCS as the kernel driver will strip it away. */ + left_frame +=3D ETH_FCS_LEN; + + /* repeat while we still have frame to transfer to memory */ + while (!eof_transferred) { + /* Return descriptor no matter what happens */ + rx_desc.rdes0 &=3D ~RX_DESC_RDES0_OWN; + /* Set the frame to be an IPv4/IPv6 frame. */ + rx_desc.rdes0 |=3D RX_DESC_RDES0_FRM_TYPE_MASK; + + /* step 4 */ + rx_buf_len =3D RX_DESC_RDES1_BFFR1_SZ_MASK(rx_desc.rdes1); + rx_buf_addr =3D rx_desc.rdes2; + gmac->regs[R_NPCM_DMA_CUR_RX_BUF_ADDR] =3D rx_buf_addr; + gmac_rx_transfer_frame_to_buffer(rx_buf_len, &left_frame, rx_buf_a= ddr, + &eof_transferred, &frame_ptr, + &transferred); + + trace_npcm_gmac_packet_receiving_buffer(DEVICE(gmac)->canonical_pa= th, + rx_buf_len, rx_buf_addr); + /* if we still have frame left and the second buffer is not chaine= d */ + if (!(rx_desc.rdes1 & RX_DESC_RDES1_SEC_ADDR_CHND_MASK) && \ + !eof_transferred) { + /* repeat process from above on buffer 2 */ + rx_buf_len =3D RX_DESC_RDES1_BFFR2_SZ_MASK(rx_desc.rdes1); + rx_buf_addr =3D rx_desc.rdes3; + gmac->regs[R_NPCM_DMA_CUR_RX_BUF_ADDR] =3D rx_buf_addr; + gmac_rx_transfer_frame_to_buffer(rx_buf_len, &left_frame, + rx_buf_addr, &eof_transferred, + &frame_ptr, &transferred); + trace_npcm_gmac_packet_receiving_buffer( \ + DEVICE(gmac)->canonical_pa= th, + rx_buf_len, rx_buf_addr); + } + /* update address for descriptor */ + gmac->regs[R_NPCM_DMA_HOST_RX_DESC] =3D rx_buf_addr; + /* Return descriptor */ + rx_desc.rdes0 &=3D ~RX_DESC_RDES0_OWN; + /* Update frame length transferred */ + rx_desc.rdes0 |=3D ((uint32_t)transferred) + << RX_DESC_RDES0_FRAME_LEN_SHIFT; + trace_npcm_gmac_debug_desc_data(DEVICE(gmac)->canonical_path, &rx_= desc, + rx_desc.rdes0, rx_desc.rdes1, + rx_desc.rdes2, rx_desc.rdes3); + + /* step 5 */ + gmac_write_rx_desc(desc_addr, &rx_desc); + trace_npcm_gmac_debug_desc_data(DEVICE(gmac)->canonical_path, + &rx_desc, rx_desc.rdes0, + rx_desc.rdes1, rx_desc.rdes2, + rx_desc.rdes3); + /* read new descriptor into rx_desc if needed*/ + if (!eof_transferred) { + /* Get next descriptor address (chained or sequential) */ + if (rx_desc.rdes1 & RX_DESC_RDES1_RC_END_RING_MASK) { + desc_addr =3D gmac->regs[R_NPCM_DMA_RX_BASE_ADDR]; + } else if (rx_desc.rdes1 & RX_DESC_RDES1_SEC_ADDR_CHND_MASK) { + desc_addr =3D rx_desc.rdes3; + } else { + desc_addr +=3D sizeof(rx_desc); + } + trace_npcm_gmac_packet_desc_read(DEVICE(gmac)->canonical_path, + desc_addr); + if (gmac_read_rx_desc(desc_addr, &rx_desc)) { + qemu_log_mask(LOG_GUEST_ERROR, + "RX Descriptor @ 0x%x cant be read\n", + desc_addr); + gmac->regs[R_NPCM_DMA_STATUS] |=3D NPCM_DMA_STATUS_RU; + gmac_update_irq(gmac); + return len; + } + + /* step 6 */ + if (!(rx_desc.rdes0 & RX_DESC_RDES0_OWN)) { + if (!(gmac->regs[R_NPCM_DMA_CONTROL] & \ + NPCM_DMA_CONTROL_FLUSH_MASK)) { + rx_desc.rdes0 |=3D RX_DESC_RDES0_DESC_ERR_MASK; + } + eof_transferred =3D true; + } + /* Clear rdes0 for the incoming descriptor */ + rx_desc.rdes0 =3D 0; + } + } + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_RX_RUNNING_CLOSING_STATE); + + rx_desc.rdes0 |=3D RX_DESC_RDES0_LAST_DESC_MASK; + if (!(rx_desc.rdes1 & RX_DESC_RDES1_DIS_INTR_COMP_MASK)) { + gmac->regs[R_NPCM_DMA_STATUS] |=3D NPCM_DMA_STATUS_RI; + gmac_update_irq(gmac); + } + trace_npcm_gmac_debug_desc_data(DEVICE(gmac)->canonical_path, &rx_desc, + rx_desc.rdes0, rx_desc.rdes1, rx_desc.= rdes2, + rx_desc.rdes3); + + /* step 8 */ + gmac->regs[R_NPCM_DMA_CONTROL] |=3D NPCM_DMA_CONTROL_FLUSH_MASK; + + /* step 9 */ + trace_npcm_gmac_packet_received(DEVICE(gmac)->canonical_path, left_fra= me); + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_RX_RUNNING_WAITING_STATE); + gmac_write_rx_desc(desc_addr, &rx_desc); + + /* Get next descriptor address (chained or sequential) */ + if (rx_desc.rdes1 & RX_DESC_RDES1_RC_END_RING_MASK) { + desc_addr =3D gmac->regs[R_NPCM_DMA_RX_BASE_ADDR]; + } else if (rx_desc.rdes1 & RX_DESC_RDES1_SEC_ADDR_CHND_MASK) { + desc_addr =3D rx_desc.rdes3; + } else { + desc_addr +=3D sizeof(rx_desc); + } + gmac->regs[R_NPCM_DMA_HOST_RX_DESC] =3D desc_addr; + return len; +} =20 static void gmac_cleanup(NetClientState *nc) { @@ -303,6 +595,7 @@ static void npcm_gmac_write(void *opaque, hwaddr offset, break; =20 case A_NPCM_GMAC_MAC_CONFIG: + gmac->regs[offset / sizeof(uint32_t)] =3D v; break; =20 case A_NPCM_GMAC_MII_ADDR: @@ -344,6 +637,31 @@ static void npcm_gmac_write(void *opaque, hwaddr offse= t, =20 case A_NPCM_DMA_RCV_POLL_DEMAND: /* We dont actually care about the value */ + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_RX_RUNNING_WAITING_STATE); + break; + + case A_NPCM_DMA_XMT_POLL_DEMAND: + /* We dont actually care about the value */ + gmac_try_send_next_packet(gmac); + break; + + case A_NPCM_DMA_CONTROL: + gmac->regs[offset / sizeof(uint32_t)] =3D v; + if (v & NPCM_DMA_CONTROL_START_STOP_TX) { + gmac_try_send_next_packet(gmac); + } else { + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIF= T, + NPCM_DMA_STATUS_TX_STOPPED_STATE); + } + if (v & NPCM_DMA_CONTROL_START_STOP_RX) { + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIF= T, + NPCM_DMA_STATUS_RX_RUNNING_WAITING_STATE); + qemu_flush_queued_packets(qemu_get_queue(gmac->nic)); + } else { + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIF= T, + NPCM_DMA_STATUS_RX_STOPPED_STATE); + } break; =20 case A_NPCM_DMA_STATUS: @@ -354,6 +672,14 @@ static void npcm_gmac_write(void *opaque, hwaddr offse= t, HWADDR_PRIx ", value: 0x%04" PRIx64 "\n", DEVICE(gmac)->canonical_path, offset, v); } + /* for W1C bits, implement W1C */ + gmac->regs[offset / sizeof(uint32_t)] &=3D ~NPCM_DMA_STATUS_W1C_MA= SK(v); + if (v & NPCM_DMA_STATUS_RU) { + /* Clearing RU bit indicates descriptor is owned by DMA again.= */ + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIF= T, + NPCM_DMA_STATUS_RX_RUNNING_WAITING_STATE); + qemu_flush_queued_packets(qemu_get_queue(gmac->nic)); + } break; =20 default: --=20 2.43.0.472.g3155946c3a-goog