From nobody Wed Nov 27 20:34:51 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=1697652832; cv=none; d=zohomail.com; s=zohoarc; b=kzyVFaCKWvlRLAVESxWMe/VTSHXpHwPa6UjpusCYB5NB33vcnJAURkGGR+My7I0iv6oFFnoi4dsjJ1ksHXCJ+iLYk5d3/hkuES34JxzcUQnAJx3n81y/YeIZElkZaOIsQV1eXi/Si0Kuc9HpnhlOkXbLFT2YFEvP9pUNuLhPjfw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1697652832; 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=nh01iEPPwo2DNCBp0O2gNQtksVnVX5vHAAbfR1EPO/o=; b=J5nj6e42Rkc5WZm4jKKinGYi3OdlhKjntXF80hLeqH4GeIzC5B+W+UF9x4O/lnvgYIaZP+FnhCkOBFx83JV6WgVNaw29CEDGqz1QjASivwQcT2Hpf+bLjwAicsDriW/XGARoB/IvhLINu3nNxR46oEdDBOE0JydycFx6JbZR1yE= 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 1697652832619298.5725906228297; Wed, 18 Oct 2023 11:13:52 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qtB1l-0006hP-9T; Wed, 18 Oct 2023 14:12:17 -0400 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 <3_B8wZQwKCi0WJKRQNbcNOJWPXXPUN.LXVZNVd-MNeNUWXWPWd.XaP@flex--nabihestefan.bounces.google.com>) id 1qtB1j-0006gK-Rw for qemu-devel@nongnu.org; Wed, 18 Oct 2023 14:12:15 -0400 Received: from mail-oi1-x249.google.com ([2607:f8b0:4864:20::249]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from <3_B8wZQwKCi0WJKRQNbcNOJWPXXPUN.LXVZNVd-MNeNUWXWPWd.XaP@flex--nabihestefan.bounces.google.com>) id 1qtB1h-0008CD-SH for qemu-devel@nongnu.org; Wed, 18 Oct 2023 14:12:15 -0400 Received: by mail-oi1-x249.google.com with SMTP id 5614622812f47-3ae65ecb25aso11128929b6e.2 for ; Wed, 18 Oct 2023 11:12:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1697652732; x=1698257532; 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=nh01iEPPwo2DNCBp0O2gNQtksVnVX5vHAAbfR1EPO/o=; b=0LzoQOAm4rj1kn64BeyIBlVfTIEjebu2BZ50KUHRRrA4B8TLlqeVBG6NWtDECLaM8G lpMaFA2QrG4O9yjVBgNWk7WwAIlc8TBLxNu/xKgR0nf1PDDryyfkT+yJOM0uIeqQQppg weznlhPVAek42ENsCee0a6gtTlUS00iTtc9hvIwzd6vv4/HrXi7o5nZILH9ssVWglvw7 PQSaIBXI2wE9uj+x+pe7IHLfK7/jawCs4i2UYFY0Hlb7NOLZxiDRNIEy1FRKxv6a7J0B y423K4RCGdYMse5RbChXJfwtvlm3panY65ZPmq6+FuXC9t7lLJChnLaOjN3QPPuhAf/T HxOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697652732; x=1698257532; 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=nh01iEPPwo2DNCBp0O2gNQtksVnVX5vHAAbfR1EPO/o=; b=EKe0LHvszcaGm5LAnaIuqs8i4Ud6WWkerOYZs6dDwBk/WMT6ymCYn7nXNi6nZjcaux LyeKQS0IIb9vDsNtz8QzTOX5QTrNrVc3Y88hg2peDGndn9n8583cP4IR6lXGjPydlcGm PBycjYkMgV4Qjc9JQocizbnvpHgV/mli29BX+4Z/cbILp1ocy5661ExShYWyjLKc6it2 +i5GD0nakUpJf2bIsNBPGTAbSmcd0Tg7IPPNNDWL4/G5k1XOSwqjKHr3Ag/Sx50k5C0v lTxDm53G7n+Aad52c1HPFFMakWW/8s5bFsdaEdp/06Q8l2/672VTN2v0SHf8UncEkGtV l2UQ== X-Gm-Message-State: AOJu0YxXL9kRc9cpxwrUzft6phHtNIAF80uAIB0DEmkmP8qdmx7ouiEj w18xFHfsC0qn0epDe+LRFWK93dYCUPJ6vtMzZl4= X-Google-Smtp-Source: AGHT+IFBPhJj+NCPMBsCa9TuOrL9diK582YS/uJ1BEd44omDzXKDGLJvToKh/6VOp/8bWiEWDeskPGS9bb0fMNdKU84= X-Received: from nabihestefan.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:2737]) (user=nabihestefan job=sendgmr) by 2002:a05:6808:6383:b0:3af:75e6:efa8 with SMTP id ec3-20020a056808638300b003af75e6efa8mr1743263oib.6.1697652732140; Wed, 18 Oct 2023 11:12:12 -0700 (PDT) Date: Wed, 18 Oct 2023 18:11:51 +0000 In-Reply-To: <20231018181152.745496-1-nabihestefan@google.com> Mime-Version: 1.0 References: <20231018181152.745496-1-nabihestefan@google.com> X-Mailer: git-send-email 2.42.0.655.g421f12c284-goog Message-ID: <20231018181152.745496-11-nabihestefan@google.com> Subject: [PATCH 10/11] hw/net: GMAC Tx Implementation From: Nabih Estefan To: peter.maydell@linaro.org Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org, kfting@nuvoton.com, wuhaotsh@google.com, jasonwang@redhat.com, avi.fishman@nuvoton.com, nabihestefan@google.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::249; envelope-from=3_B8wZQwKCi0WJKRQNbcNOJWPXXPUN.LXVZNVd-MNeNUWXWPWd.XaP@flex--nabihestefan.bounces.google.com; helo=mail-oi1-x249.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, 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: 1697652833153100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Nabih Estefan Diaz - Implementation of Transmit function for packets - Implementation for reading and writing from and to descriptors in memory for Tx NOTE: This function implements the steps detailed in the datasheet for transmitting messages from the GMAC. Signed-off-by: Nabih Estefan Diaz --- hw/net/npcm_gmac.c | 152 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) diff --git a/hw/net/npcm_gmac.c b/hw/net/npcm_gmac.c index cd59ca5fd4..bfceffbb9c 100644 --- a/hw/net/npcm_gmac.c +++ b/hw/net/npcm_gmac.c @@ -267,6 +267,7 @@ static int gmac_write_tx_desc(dma_addr_t addr, struct N= PCMGMACTxDesc *desc) } return 0; } + static int gmac_rx_transfer_frame_to_buffer(uint32_t rx_buf_len, uint32_t *left_frame, uint32_t rx_buf_addr, @@ -488,6 +489,157 @@ static ssize_t gmac_receive(NetClientState *nc, const= uint8_t *buf, size_t len) gmac->regs[R_NPCM_DMA_HOST_RX_DESC] =3D desc_addr; return len; } + +static int gmac_tx_get_csum(uint32_t tdes1) +{ + uint32_t mask =3D TX_DESC_TDES1_CHKSM_INS_CTRL_MASK(tdes1); + int csum =3D 0; + + if (likely(mask > 0)) { + csum |=3D CSUM_IP; + } + if (likely(mask > 1)) { + csum |=3D CSUM_TCP | CSUM_UDP; + } + + return csum; +} + +static void gmac_try_send_next_packet(NPCMGMACState *gmac) +{ + /* + * Comments about steps refer to steps for + * transmitting in page 384 of datasheet + */ + uint16_t tx_buffer_size =3D 2048; + g_autofree uint8_t *tx_send_buffer =3D g_malloc(tx_buffer_size); + uint32_t desc_addr; + struct NPCMGMACTxDesc tx_desc; + uint32_t tx_buf_addr, tx_buf_len; + uint16_t length =3D 0; + uint8_t *buf =3D tx_send_buffer; + uint32_t prev_buf_size =3D 0; + int csum =3D 0; + + /* steps 1&2 */ + if (!gmac->regs[R_NPCM_DMA_HOST_TX_DESC]) { + gmac->regs[R_NPCM_DMA_HOST_TX_DESC] =3D + NPCM_DMA_HOST_TX_DESC_MASK(gmac->regs[R_NPCM_DMA_TX_BASE_ADDR]= ); + } + desc_addr =3D gmac->regs[R_NPCM_DMA_HOST_TX_DESC]; + + while (true) { + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_TX_RUNNING_FETCHING_STATE); + trace_npcm_gmac_packet_transmit(DEVICE(gmac)->canonical_path, leng= th); + if (gmac_read_tx_desc(desc_addr, &tx_desc)) { + qemu_log_mask(LOG_GUEST_ERROR, + "TX Descriptor @ 0x%x can't be read\n", + desc_addr); + return; + } + /* step 3 */ + + trace_npcm_gmac_packet_desc_read(DEVICE(gmac)->canonical_path, + desc_addr); + trace_npcm_gmac_debug_desc_data(DEVICE(gmac)->canonical_path, &tx_= desc, + tx_desc.tdes0, tx_desc.tdes1, tx_desc.tdes2, tx_desc.tdes3); + + /* 1 =3D DMA Owned, 0 =3D Software Owned */ + if (!(tx_desc.tdes0 & TX_DESC_TDES0_OWN)) { + qemu_log_mask(LOG_GUEST_ERROR, + "TX Descriptor @ 0x%x is owned by software\n", + desc_addr); + gmac->regs[R_NPCM_DMA_STATUS] |=3D NPCM_DMA_STATUS_TU; + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIF= T, + NPCM_DMA_STATUS_TX_SUSPENDED_STATE); + gmac_update_irq(gmac); + return; + } + + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_TX_RUNNING_READ_STATE); + /* Give the descriptor back regardless of what happens. */ + tx_desc.tdes0 &=3D ~TX_DESC_TDES0_OWN; + + if (tx_desc.tdes1 & TX_DESC_TDES1_FIRST_SEG_MASK) { + csum =3D gmac_tx_get_csum(tx_desc.tdes1); + } + + /* step 4 */ + tx_buf_addr =3D tx_desc.tdes2; + gmac->regs[R_NPCM_DMA_CUR_TX_BUF_ADDR] =3D tx_buf_addr; + tx_buf_len =3D TX_DESC_TDES1_BFFR1_SZ_MASK(tx_desc.tdes1); + buf =3D &tx_send_buffer[prev_buf_size]; + + if ((prev_buf_size + tx_buf_len) > sizeof(buf)) { + tx_buffer_size =3D prev_buf_size + tx_buf_len; + tx_send_buffer =3D g_realloc(tx_send_buffer, tx_buffer_size); + buf =3D &tx_send_buffer[prev_buf_size]; + } + + /* step 5 */ + if (dma_memory_read(&address_space_memory, tx_buf_addr, buf, + tx_buf_len, MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: Failed to read packet @ 0x= %x\n", + __func__, tx_buf_addr); + return; + } + length +=3D tx_buf_len; + prev_buf_size +=3D tx_buf_len; + + /* If not chained we'll have a second buffer. */ + if (!(tx_desc.tdes1 & TX_DESC_TDES1_SEC_ADDR_CHND_MASK)) { + tx_buf_addr =3D tx_desc.tdes3; + gmac->regs[R_NPCM_DMA_CUR_TX_BUF_ADDR] =3D tx_buf_addr; + tx_buf_len =3D TX_DESC_TDES1_BFFR2_SZ_MASK(tx_desc.tdes1); + buf =3D &tx_send_buffer[prev_buf_size]; + + if ((prev_buf_size + tx_buf_len) > sizeof(buf)) { + tx_buffer_size =3D prev_buf_size + tx_buf_len; + tx_send_buffer =3D g_realloc(tx_send_buffer, tx_buffer_siz= e); + buf =3D &tx_send_buffer[prev_buf_size]; + } + + if (dma_memory_read(&address_space_memory, tx_buf_addr, buf, + tx_buf_len, MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Failed to read packet @ 0x%x\n", + __func__, tx_buf_addr); + return; + } + length +=3D tx_buf_len; + prev_buf_size +=3D tx_buf_len; + } + if (tx_desc.tdes1 & TX_DESC_TDES1_LAST_SEG_MASK) { + net_checksum_calculate(tx_send_buffer, length, csum); + qemu_send_packet(qemu_get_queue(gmac->nic), tx_send_buffer, le= ngth); + trace_npcm_gmac_packet_sent(DEVICE(gmac)->canonical_path, leng= th); + buf =3D tx_send_buffer; + length =3D 0; + } + + /* step 6 */ + gmac_dma_set_state(gmac, NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT, + NPCM_DMA_STATUS_TX_RUNNING_CLOSING_STATE); + gmac_write_tx_desc(desc_addr, &tx_desc); + if (tx_desc.tdes1 & TX_DESC_TDES1_TX_END_RING_MASK) { + desc_addr =3D gmac->regs[R_NPCM_DMA_TX_BASE_ADDR]; + } else if (tx_desc.tdes1 & TX_DESC_TDES1_SEC_ADDR_CHND_MASK) { + desc_addr =3D tx_desc.tdes3; + } else { + desc_addr +=3D sizeof(tx_desc); + } + gmac->regs[R_NPCM_DMA_HOST_TX_DESC] =3D desc_addr; + + /* step 7 */ + if (tx_desc.tdes1 & TX_DESC_TDES1_INTERR_COMP_MASK) { + gmac->regs[R_NPCM_DMA_STATUS] |=3D NPCM_DMA_STATUS_TI; + gmac_update_irq(gmac); + } + } +} + static void gmac_cleanup(NetClientState *nc) { /* Nothing to do yet. */ --=20 2.42.0.655.g421f12c284-goog