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Tsirkin" , Yan Vugenfirer , Yuri Benditovich , Sriram Yagnaraman , Akihiko Odaki Subject: [PATCH v2 15/26] e1000e: Introduce e1000_rx_desc_union Date: Tue, 24 Jan 2023 13:31:32 +0900 Message-Id: <20230124043143.5515-16-akihiko.odaki@daynix.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230124043143.5515-1-akihiko.odaki@daynix.com> References: <20230124043143.5515-1-akihiko.odaki@daynix.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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=2607:f8b0:4864:20::62c; envelope-from=akihiko.odaki@daynix.com; helo=mail-pl1-x62c.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @daynix-com.20210112.gappssmtp.com) X-ZM-MESSAGEID: 1674535099718100003 Content-Type: text/plain; charset="utf-8" Before this change, e1000e_write_packet_to_guest() allocated the receive descriptor buffer as an array of uint8_t. This does not ensure the buffer is sufficiently aligned. Introduce e1000_rx_desc_union type, a union type of all receive descriptor types to correct this. Signed-off-by: Akihiko Odaki --- hw/net/e1000_regs.h | 1 - hw/net/e1000e_core.c | 115 +++++++++++++++++++++---------------------- 2 files changed, 57 insertions(+), 59 deletions(-) diff --git a/hw/net/e1000_regs.h b/hw/net/e1000_regs.h index 6a36573802..4545fe25a6 100644 --- a/hw/net/e1000_regs.h +++ b/hw/net/e1000_regs.h @@ -1061,7 +1061,6 @@ union e1000_rx_desc_packet_split { #define E1000_RING_DESC_LEN_SHIFT (4) =20 #define E1000_MIN_RX_DESC_LEN E1000_RING_DESC_LEN -#define E1000_MAX_RX_DESC_LEN (sizeof(union e1000_rx_desc_packet_split)) =20 /* Receive Descriptor bit definitions */ #define E1000_RXD_STAT_DD 0x01 /* Descriptor Done */ diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c index b8670662c8..d8c17baf8f 100644 --- a/hw/net/e1000e_core.c +++ b/hw/net/e1000e_core.c @@ -55,6 +55,12 @@ =20 #define E1000E_MAX_TX_FRAGS (64) =20 +union e1000_rx_desc_union { + struct e1000_rx_desc legacy; + union e1000_rx_desc_extended extended; + union e1000_rx_desc_packet_split packet_split; +}; + static inline void e1000e_set_interrupt_cause(E1000ECore *core, uint32_t val); =20 @@ -1053,29 +1059,28 @@ e1000e_receive_filter(E1000ECore *core, const uint8= _t *buf, int size) } =20 static inline void -e1000e_read_lgcy_rx_descr(E1000ECore *core, uint8_t *desc, hwaddr *buff_ad= dr) +e1000e_read_lgcy_rx_descr(E1000ECore *core, struct e1000_rx_desc *desc, + hwaddr *buff_addr) { - struct e1000_rx_desc *d =3D (struct e1000_rx_desc *) desc; - *buff_addr =3D le64_to_cpu(d->buffer_addr); + *buff_addr =3D le64_to_cpu(desc->buffer_addr); } =20 static inline void -e1000e_read_ext_rx_descr(E1000ECore *core, uint8_t *desc, hwaddr *buff_add= r) +e1000e_read_ext_rx_descr(E1000ECore *core, union e1000_rx_desc_extended *d= esc, + hwaddr *buff_addr) { - union e1000_rx_desc_extended *d =3D (union e1000_rx_desc_extended *) d= esc; - *buff_addr =3D le64_to_cpu(d->read.buffer_addr); + *buff_addr =3D le64_to_cpu(desc->read.buffer_addr); } =20 static inline void -e1000e_read_ps_rx_descr(E1000ECore *core, uint8_t *desc, +e1000e_read_ps_rx_descr(E1000ECore *core, + union e1000_rx_desc_packet_split *desc, hwaddr (*buff_addr)[MAX_PS_BUFFERS]) { int i; - union e1000_rx_desc_packet_split *d =3D - (union e1000_rx_desc_packet_split *) desc; =20 for (i =3D 0; i < MAX_PS_BUFFERS; i++) { - (*buff_addr)[i] =3D le64_to_cpu(d->read.buffer_addr[i]); + (*buff_addr)[i] =3D le64_to_cpu(desc->read.buffer_addr[i]); } =20 trace_e1000e_rx_desc_ps_read((*buff_addr)[0], (*buff_addr)[1], @@ -1083,17 +1088,17 @@ e1000e_read_ps_rx_descr(E1000ECore *core, uint8_t *= desc, } =20 static inline void -e1000e_read_rx_descr(E1000ECore *core, uint8_t *desc, +e1000e_read_rx_descr(E1000ECore *core, union e1000_rx_desc_union *desc, hwaddr (*buff_addr)[MAX_PS_BUFFERS]) { if (e1000e_rx_use_legacy_descriptor(core)) { - e1000e_read_lgcy_rx_descr(core, desc, &(*buff_addr)[0]); + e1000e_read_lgcy_rx_descr(core, &desc->legacy, &(*buff_addr)[0]); (*buff_addr)[1] =3D (*buff_addr)[2] =3D (*buff_addr)[3] =3D 0; } else { if (core->mac[RCTL] & E1000_RCTL_DTYP_PS) { - e1000e_read_ps_rx_descr(core, desc, buff_addr); + e1000e_read_ps_rx_descr(core, &desc->packet_split, buff_addr); } else { - e1000e_read_ext_rx_descr(core, desc, &(*buff_addr)[0]); + e1000e_read_ext_rx_descr(core, &desc->extended, &(*buff_addr)[= 0]); (*buff_addr)[1] =3D (*buff_addr)[2] =3D (*buff_addr)[3] =3D 0; } } @@ -1264,7 +1269,7 @@ func_exit: } =20 static inline void -e1000e_write_lgcy_rx_descr(E1000ECore *core, uint8_t *desc, +e1000e_write_lgcy_rx_descr(E1000ECore *core, struct e1000_rx_desc *desc, struct NetRxPkt *pkt, const E1000E_RSSInfo *rss_info, uint16_t length) @@ -1272,71 +1277,66 @@ e1000e_write_lgcy_rx_descr(E1000ECore *core, uint8_= t *desc, uint32_t status_flags, rss, mrq; uint16_t ip_id; =20 - struct e1000_rx_desc *d =3D (struct e1000_rx_desc *) desc; - assert(!rss_info->enabled); =20 - d->length =3D cpu_to_le16(length); - d->csum =3D 0; + desc->length =3D cpu_to_le16(length); + desc->csum =3D 0; =20 e1000e_build_rx_metadata(core, pkt, pkt !=3D NULL, rss_info, &rss, &mrq, &status_flags, &ip_id, - &d->special); - d->errors =3D (uint8_t) (le32_to_cpu(status_flags) >> 24); - d->status =3D (uint8_t) le32_to_cpu(status_flags); + &desc->special); + desc->errors =3D (uint8_t) (le32_to_cpu(status_flags) >> 24); + desc->status =3D (uint8_t) le32_to_cpu(status_flags); } =20 static inline void -e1000e_write_ext_rx_descr(E1000ECore *core, uint8_t *desc, +e1000e_write_ext_rx_descr(E1000ECore *core, union e1000_rx_desc_extended *= desc, struct NetRxPkt *pkt, const E1000E_RSSInfo *rss_info, uint16_t length) { - union e1000_rx_desc_extended *d =3D (union e1000_rx_desc_extended *) d= esc; - - memset(&d->wb, 0, sizeof(d->wb)); + memset(&desc->wb, 0, sizeof(desc->wb)); =20 - d->wb.upper.length =3D cpu_to_le16(length); + desc->wb.upper.length =3D cpu_to_le16(length); =20 e1000e_build_rx_metadata(core, pkt, pkt !=3D NULL, rss_info, - &d->wb.lower.hi_dword.rss, - &d->wb.lower.mrq, - &d->wb.upper.status_error, - &d->wb.lower.hi_dword.csum_ip.ip_id, - &d->wb.upper.vlan); + &desc->wb.lower.hi_dword.rss, + &desc->wb.lower.mrq, + &desc->wb.upper.status_error, + &desc->wb.lower.hi_dword.csum_ip.ip_id, + &desc->wb.upper.vlan); } =20 static inline void -e1000e_write_ps_rx_descr(E1000ECore *core, uint8_t *desc, +e1000e_write_ps_rx_descr(E1000ECore *core, + union e1000_rx_desc_packet_split *desc, struct NetRxPkt *pkt, const E1000E_RSSInfo *rss_info, size_t ps_hdr_len, uint16_t(*written)[MAX_PS_BUFFERS]) { int i; - union e1000_rx_desc_packet_split *d =3D - (union e1000_rx_desc_packet_split *) desc; =20 - memset(&d->wb, 0, sizeof(d->wb)); + memset(&desc->wb, 0, sizeof(desc->wb)); =20 - d->wb.middle.length0 =3D cpu_to_le16((*written)[0]); + desc->wb.middle.length0 =3D cpu_to_le16((*written)[0]); =20 for (i =3D 0; i < PS_PAGE_BUFFERS; i++) { - d->wb.upper.length[i] =3D cpu_to_le16((*written)[i + 1]); + desc->wb.upper.length[i] =3D cpu_to_le16((*written)[i + 1]); } =20 e1000e_build_rx_metadata(core, pkt, pkt !=3D NULL, rss_info, - &d->wb.lower.hi_dword.rss, - &d->wb.lower.mrq, - &d->wb.middle.status_error, - &d->wb.lower.hi_dword.csum_ip.ip_id, - &d->wb.middle.vlan); + &desc->wb.lower.hi_dword.rss, + &desc->wb.lower.mrq, + &desc->wb.middle.status_error, + &desc->wb.lower.hi_dword.csum_ip.ip_id, + &desc->wb.middle.vlan); =20 - d->wb.upper.header_status =3D + desc->wb.upper.header_status =3D cpu_to_le16(ps_hdr_len | (ps_hdr_len ? E1000_RXDPS_HDRSTAT_HDRSP := 0)); =20 trace_e1000e_rx_desc_ps_write((*written)[0], (*written)[1], @@ -1344,20 +1344,21 @@ e1000e_write_ps_rx_descr(E1000ECore *core, uint8_t = *desc, } =20 static inline void -e1000e_write_rx_descr(E1000ECore *core, uint8_t *desc, +e1000e_write_rx_descr(E1000ECore *core, union e1000_rx_desc_union *desc, struct NetRxPkt *pkt, const E1000E_RSSInfo *rss_info, size_t ps_hdr_len, uint16_t(*written)[MAX_PS_BUFFERS]) { if (e1000e_rx_use_legacy_descriptor(core)) { assert(ps_hdr_len =3D=3D 0); - e1000e_write_lgcy_rx_descr(core, desc, pkt, rss_info, (*written)[0= ]); + e1000e_write_lgcy_rx_descr(core, &desc->legacy, pkt, rss_info, + (*written)[0]); } else { if (core->mac[RCTL] & E1000_RCTL_DTYP_PS) { - e1000e_write_ps_rx_descr(core, desc, pkt, rss_info, + e1000e_write_ps_rx_descr(core, &desc->packet_split, pkt, rss_i= nfo, ps_hdr_len, written); } else { assert(ps_hdr_len =3D=3D 0); - e1000e_write_ext_rx_descr(core, desc, pkt, rss_info, + e1000e_write_ext_rx_descr(core, &desc->extended, pkt, rss_info, (*written)[0]); } } @@ -1365,12 +1366,12 @@ struct NetRxPkt *pkt, const E1000E_RSSInfo *rss_inf= o, =20 static inline void e1000e_pci_dma_write_rx_desc(E1000ECore *core, dma_addr_t addr, - uint8_t *desc, dma_addr_t len) + union e1000_rx_desc_union *desc, dma_addr_t l= en) { PCIDevice *dev =3D core->owner; =20 if (e1000e_rx_use_legacy_descriptor(core)) { - struct e1000_rx_desc *d =3D (struct e1000_rx_desc *) desc; + struct e1000_rx_desc *d =3D &desc->legacy; size_t offset =3D offsetof(struct e1000_rx_desc, status); uint8_t status =3D d->status; =20 @@ -1383,8 +1384,7 @@ e1000e_pci_dma_write_rx_desc(E1000ECore *core, dma_ad= dr_t addr, } } else { if (core->mac[RCTL] & E1000_RCTL_DTYP_PS) { - union e1000_rx_desc_packet_split *d =3D - (union e1000_rx_desc_packet_split *) desc; + union e1000_rx_desc_packet_split *d =3D &desc->packet_split; size_t offset =3D offsetof(union e1000_rx_desc_packet_split, wb.middle.status_error); uint32_t status =3D d->wb.middle.status_error; @@ -1397,8 +1397,7 @@ e1000e_pci_dma_write_rx_desc(E1000ECore *core, dma_ad= dr_t addr, pci_dma_write(dev, addr + offset, &status, sizeof(status)); } } else { - union e1000_rx_desc_extended *d =3D - (union e1000_rx_desc_extended *) desc; + union e1000_rx_desc_extended *d =3D &desc->extended; size_t offset =3D offsetof(union e1000_rx_desc_extended, wb.upper.status_error); uint32_t status =3D d->wb.upper.status_error; @@ -1542,7 +1541,7 @@ e1000e_write_packet_to_guest(E1000ECore *core, struct= NetRxPkt *pkt, { PCIDevice *d =3D core->owner; dma_addr_t base; - uint8_t desc[E1000_MAX_RX_DESC_LEN]; + union e1000_rx_desc_union desc; size_t desc_size; size_t desc_offset =3D 0; size_t iov_ofs =3D 0; @@ -1578,7 +1577,7 @@ e1000e_write_packet_to_guest(E1000ECore *core, struct= NetRxPkt *pkt, =20 trace_e1000e_rx_descr(rxi->idx, base, core->rx_desc_len); =20 - e1000e_read_rx_descr(core, desc, &ba); + e1000e_read_rx_descr(core, &desc, &ba); =20 if (ba[0]) { if (desc_offset < size) { @@ -1648,9 +1647,9 @@ e1000e_write_packet_to_guest(E1000ECore *core, struct= NetRxPkt *pkt, is_last =3D true; } =20 - e1000e_write_rx_descr(core, desc, is_last ? core->rx_pkt : NULL, + e1000e_write_rx_descr(core, &desc, is_last ? core->rx_pkt : NULL, rss_info, do_ps ? ps_hdr_len : 0, &bastate.writ= ten); - e1000e_pci_dma_write_rx_desc(core, base, desc, core->rx_desc_len); + e1000e_pci_dma_write_rx_desc(core, base, &desc, core->rx_desc_len); =20 e1000e_ring_advance(core, rxi, core->rx_desc_len / E1000_MIN_RX_DESC_LEN); --=20 2.39.0