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[193.152.124.33]) by smtp.gmail.com with ESMTPSA id h204sm4790919wmh.33.2021.12.23.03.59.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Dec 2021 03:59:12 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v2 14/23] dma: Let dma_buf_read() / dma_buf_write() propagate MemTxResult Date: Thu, 23 Dec 2021 12:55:45 +0100 Message-Id: <20211223115554.3155328-15-philmd@redhat.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211223115554.3155328-1-philmd@redhat.com> References: <20211223115554.3155328-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.203, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-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: , Cc: Fam Zheng , Peter Maydell , Dmitry Fleytman , "Michael S. Tsirkin" , Jason Wang , Bin Meng , David Hildenbrand , Peter Xu , Gerd Hoffmann , Klaus Jensen , "Edgar E. Iglesias" , Sven Schnelle , Hannes Reinecke , qemu-block@nongnu.org, Daniel Henrique Barboza , Havard Skinnemoen , Joel Stanley , Stefan Weil , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Mark Cave-Ayland , Alistair Francis , Richard Henderson , Greg Kurz , Beniamino Galvani , Eric Auger , qemu-arm@nongnu.org, Jan Kiszka , =?utf-8?q?C=C3=A9dric_?= =?utf-8?q?Le_Goater?= , Keith Busch , John Snow , David Gibson , Eduardo Habkost , Andrew Jeffery , Klaus Jensen , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Andrew Baumann , Tyrone Ting , qemu-ppc@nongnu.org, Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Since the previous commit, dma_buf_rw() returns a MemTxResult type. Do not discard it, return it to the caller. Since both dma_buf_read/dma_buf_write functions were previously returning the QEMUSGList size not consumed, add an extra argument where the unconsummed size can be stored. Update the few callers. Reviewed-by: Klaus Jensen Signed-off-by: Philippe Mathieu-Daudé --- include/sysemu/dma.h | 6 ++++-- hw/ide/ahci.c | 8 ++++---- hw/nvme/ctrl.c | 4 ++-- hw/scsi/megasas.c | 48 ++++++++++++++++++++++++++++++------------- hw/scsi/scsi-bus.c | 4 ++-- softmmu/dma-helpers.c | 18 ++++++---------- 6 files changed, 52 insertions(+), 36 deletions(-) diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index fd8f16003dd..d11c1d794f9 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -302,8 +302,10 @@ BlockAIOCB *dma_blk_read(BlockBackend *blk, BlockAIOCB *dma_blk_write(BlockBackend *blk, QEMUSGList *sg, uint64_t offset, uint32_t align, BlockCompletionFunc *cb, void *opaque); -uint64_t dma_buf_read(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs); -uint64_t dma_buf_write(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs); +MemTxResult dma_buf_read(void *ptr, int32_t len, uint64_t *residp, + QEMUSGList *sg, MemTxAttrs attrs); +MemTxResult dma_buf_write(void *ptr, int32_t len, uint64_t *residp, + QEMUSGList *sg, MemTxAttrs attrs); void dma_acct_start(BlockBackend *blk, BlockAcctCookie *cookie, QEMUSGList *sg, enum BlockAcctType type); diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c index 205dfdc6622..0c7d31ceada 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -1384,9 +1384,9 @@ static void ahci_pio_transfer(const IDEDMA *dma) const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED; if (is_write) { - dma_buf_write(s->data_ptr, size, &s->sg, attrs); + dma_buf_write(s->data_ptr, size, NULL, &s->sg, attrs); } else { - dma_buf_read(s->data_ptr, size, &s->sg, attrs); + dma_buf_read(s->data_ptr, size, NULL, &s->sg, attrs); } } @@ -1479,9 +1479,9 @@ static int ahci_dma_rw_buf(const IDEDMA *dma, bool is_write) } if (is_write) { - dma_buf_read(p, l, &s->sg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(p, l, NULL, &s->sg, MEMTXATTRS_UNSPECIFIED); } else { - dma_buf_write(p, l, &s->sg, MEMTXATTRS_UNSPECIFIED); + dma_buf_write(p, l, NULL, &s->sg, MEMTXATTRS_UNSPECIFIED); } /* free sglist, update byte count */ diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c index 462f79a1f60..fa410a179a6 100644 --- a/hw/nvme/ctrl.c +++ b/hw/nvme/ctrl.c @@ -1150,9 +1150,9 @@ static uint16_t nvme_tx(NvmeCtrl *n, NvmeSg *sg, uint8_t *ptr, uint32_t len, uint64_t residual; if (dir == NVME_TX_DIRECTION_TO_DEVICE) { - residual = dma_buf_write(ptr, len, &sg->qsg, attrs); + dma_buf_write(ptr, len, &residual, &sg->qsg, attrs); } else { - residual = dma_buf_read(ptr, len, &sg->qsg, attrs); + dma_buf_read(ptr, len, &residual, &sg->qsg, attrs); } if (unlikely(residual)) { diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c index fe36de10a21..87101705d01 100644 --- a/hw/scsi/megasas.c +++ b/hw/scsi/megasas.c @@ -738,6 +738,7 @@ static int megasas_ctrl_get_info(MegasasState *s, MegasasCmd *cmd) size_t dcmd_size = sizeof(info); BusChild *kid; int num_pd_disks = 0; + uint64_t resid; memset(&info, 0x0, dcmd_size); if (cmd->iov_size < dcmd_size) { @@ -848,7 +849,8 @@ static int megasas_ctrl_get_info(MegasasState *s, MegasasCmd *cmd) MFI_INFO_PDMIX_SATA | MFI_INFO_PDMIX_LD); - cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -856,6 +858,7 @@ static int megasas_mfc_get_defaults(MegasasState *s, MegasasCmd *cmd) { struct mfi_defaults info; size_t dcmd_size = sizeof(struct mfi_defaults); + uint64_t resid; memset(&info, 0x0, dcmd_size); if (cmd->iov_size < dcmd_size) { @@ -878,7 +881,8 @@ static int megasas_mfc_get_defaults(MegasasState *s, MegasasCmd *cmd) info.disable_preboot_cli = 1; info.cluster_disable = 1; - cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -886,6 +890,7 @@ static int megasas_dcmd_get_bios_info(MegasasState *s, MegasasCmd *cmd) { struct mfi_bios_data info; size_t dcmd_size = sizeof(info); + uint64_t resid; memset(&info, 0x0, dcmd_size); if (cmd->iov_size < dcmd_size) { @@ -899,7 +904,8 @@ static int megasas_dcmd_get_bios_info(MegasasState *s, MegasasCmd *cmd) info.expose_all_drives = 1; } - cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -907,10 +913,12 @@ static int megasas_dcmd_get_fw_time(MegasasState *s, MegasasCmd *cmd) { uint64_t fw_time; size_t dcmd_size = sizeof(fw_time); + uint64_t resid; fw_time = cpu_to_le64(megasas_fw_time()); - cmd->iov_size -= dma_buf_read(&fw_time, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&fw_time, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -930,6 +938,7 @@ static int megasas_event_info(MegasasState *s, MegasasCmd *cmd) { struct mfi_evt_log_state info; size_t dcmd_size = sizeof(info); + uint64_t resid; memset(&info, 0, dcmd_size); @@ -937,7 +946,8 @@ static int megasas_event_info(MegasasState *s, MegasasCmd *cmd) info.shutdown_seq_num = cpu_to_le32(s->shutdown_event); info.boot_seq_num = cpu_to_le32(s->boot_event); - cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -967,6 +977,7 @@ static int megasas_dcmd_pd_get_list(MegasasState *s, MegasasCmd *cmd) size_t dcmd_size = sizeof(info); BusChild *kid; uint32_t offset, dcmd_limit, num_pd_disks = 0, max_pd_disks; + uint64_t resid; memset(&info, 0, dcmd_size); offset = 8; @@ -1006,7 +1017,8 @@ static int megasas_dcmd_pd_get_list(MegasasState *s, MegasasCmd *cmd) info.size = cpu_to_le32(offset); info.count = cpu_to_le32(num_pd_disks); - cmd->iov_size -= dma_buf_read(&info, offset, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, offset, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -1100,7 +1112,9 @@ static int megasas_pd_get_info_submit(SCSIDevice *sdev, int lun, info->connected_port_bitmap = 0x1; info->device_speed = 1; info->link_speed = 1; - resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(cmd->iov_buf, dcmd_size, &resid, &cmd->qsg, + MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; g_free(cmd->iov_buf); cmd->iov_size = dcmd_size - resid; cmd->iov_buf = NULL; @@ -1172,7 +1186,7 @@ static int megasas_dcmd_ld_get_list(MegasasState *s, MegasasCmd *cmd) info.ld_count = cpu_to_le32(num_ld_disks); trace_megasas_dcmd_ld_get_list(cmd->index, num_ld_disks, max_ld_disks); - resid = dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); cmd->iov_size = dcmd_size - resid; return MFI_STAT_OK; } @@ -1221,7 +1235,7 @@ static int megasas_dcmd_ld_list_query(MegasasState *s, MegasasCmd *cmd) info.size = dcmd_size; trace_megasas_dcmd_ld_get_list(cmd->index, num_ld_disks, max_ld_disks); - resid = dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); cmd->iov_size = dcmd_size - resid; return MFI_STAT_OK; } @@ -1232,9 +1246,10 @@ static int megasas_ld_get_info_submit(SCSIDevice *sdev, int lun, struct mfi_ld_info *info = cmd->iov_buf; size_t dcmd_size = sizeof(struct mfi_ld_info); uint8_t cdb[6]; - ssize_t len, resid; + ssize_t len; uint16_t sdev_id = ((sdev->id & 0xFF) << 8) | (lun & 0xFF); uint64_t ld_size; + uint64_t resid; if (!cmd->iov_buf) { cmd->iov_buf = g_malloc0(dcmd_size); @@ -1271,7 +1286,8 @@ static int megasas_ld_get_info_submit(SCSIDevice *sdev, int lun, info->ld_config.span[0].num_blocks = info->size; info->ld_config.span[0].array_ref = cpu_to_le16(sdev_id); - resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(cmd->iov_buf, dcmd_size, &resid, &cmd->qsg, + MEMTXATTRS_UNSPECIFIED); g_free(cmd->iov_buf); cmd->iov_size = dcmd_size - resid; cmd->iov_buf = NULL; @@ -1316,6 +1332,7 @@ static int megasas_dcmd_cfg_read(MegasasState *s, MegasasCmd *cmd) struct mfi_config_data *info; int num_pd_disks = 0, array_offset, ld_offset; BusChild *kid; + uint64_t resid; if (cmd->iov_size > 4096) { return MFI_STAT_INVALID_PARAMETER; @@ -1390,7 +1407,8 @@ static int megasas_dcmd_cfg_read(MegasasState *s, MegasasCmd *cmd) ld_offset += sizeof(struct mfi_ld_config); } - cmd->iov_size -= dma_buf_read(data, info->size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(data, info->size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -1398,6 +1416,7 @@ static int megasas_dcmd_get_properties(MegasasState *s, MegasasCmd *cmd) { struct mfi_ctrl_props info; size_t dcmd_size = sizeof(info); + uint64_t resid; memset(&info, 0x0, dcmd_size); if (cmd->iov_size < dcmd_size) { @@ -1420,7 +1439,8 @@ static int megasas_dcmd_get_properties(MegasasState *s, MegasasCmd *cmd) info.ecc_bucket_leak_rate = cpu_to_le16(1440); info.expose_encl_devices = 1; - cmd->iov_size -= dma_buf_read(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(&info, dcmd_size, &resid, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + cmd->iov_size -= resid; return MFI_STAT_OK; } @@ -1465,7 +1485,7 @@ static int megasas_dcmd_set_properties(MegasasState *s, MegasasCmd *cmd) dcmd_size); return MFI_STAT_INVALID_PARAMETER; } - dma_buf_write(&info, dcmd_size, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); + dma_buf_write(&info, dcmd_size, NULL, &cmd->qsg, MEMTXATTRS_UNSPECIFIED); trace_megasas_dcmd_unsupported(cmd->index, cmd->iov_size); return MFI_STAT_OK; } diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c index 2b5e9dca311..34cf41796bb 100644 --- a/hw/scsi/scsi-bus.c +++ b/hw/scsi/scsi-bus.c @@ -1421,9 +1421,9 @@ void scsi_req_data(SCSIRequest *req, int len) buf = scsi_req_get_buf(req); if (req->cmd.mode == SCSI_XFER_FROM_DEV) { - req->resid = dma_buf_read(buf, len, req->sg, MEMTXATTRS_UNSPECIFIED); + dma_buf_read(buf, len, &req->resid, req->sg, MEMTXATTRS_UNSPECIFIED); } else { - req->resid = dma_buf_write(buf, len, req->sg, MEMTXATTRS_UNSPECIFIED); + dma_buf_write(buf, len, &req->resid, req->sg, MEMTXATTRS_UNSPECIFIED); } scsi_req_continue(req); } diff --git a/softmmu/dma-helpers.c b/softmmu/dma-helpers.c index b0be1564797..498303157e9 100644 --- a/softmmu/dma-helpers.c +++ b/softmmu/dma-helpers.c @@ -321,22 +321,16 @@ static MemTxResult dma_buf_rw(void *buf, int32_t len, uint64_t *residp, return res; } -uint64_t dma_buf_read(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs) +MemTxResult dma_buf_read(void *ptr, int32_t len, uint64_t *residp, + QEMUSGList *sg, MemTxAttrs attrs) { - uint64_t resid; - - dma_buf_rw(ptr, len, &resid, sg, DMA_DIRECTION_FROM_DEVICE, attrs); - - return resid; + return dma_buf_rw(ptr, len, residp, sg, DMA_DIRECTION_FROM_DEVICE, attrs); } -uint64_t dma_buf_write(void *ptr, int32_t len, QEMUSGList *sg, MemTxAttrs attrs) +MemTxResult dma_buf_write(void *ptr, int32_t len, uint64_t *residp, + QEMUSGList *sg, MemTxAttrs attrs) { - uint64_t resid; - - dma_buf_rw(ptr, len, &resid, sg, DMA_DIRECTION_TO_DEVICE, attrs); - - return resid; + return dma_buf_rw(ptr, len, residp, sg, DMA_DIRECTION_TO_DEVICE, attrs); } void dma_acct_start(BlockBackend *blk, BlockAcctCookie *cookie,