/* $Id: VirtioNet-solaris.c 82968 2020-02-04 10:35:17Z vboxsync $ */ /** @file * VirtualBox Guest Additions - Virtio Network Driver for Solaris. */ /* * Copyright (C) 2010-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #include "Virtio-solaris.h" #include "VirtioPci-solaris.h" #include #include #include #include #include #include #include #include #include #include #include #include /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ #define DEVICE_NAME "virtnet" /** The module descriptions as seen in 'modinfo'. */ #define DEVICE_DESC_DRV "VirtualBox VirtioNet" /** Copied from "mac_ether.h" - why the heck is this not public?? All Solaris * mac clients use it... */ #define MAC_PLUGIN_IDENT_ETHER "mac_ether" /* Copied from our Virtio Device emulation. */ #define VIRTIO_NET_CSUM 0x00000001 /* Host handles pkts w/ partial csum */ #define VIRTIO_NET_GUEST_CSUM 0x00000002 /* Guest handles pkts w/ partial csum */ #define VIRTIO_NET_MAC 0x00000020 /* Host has given MAC address. */ #define VIRTIO_NET_GSO 0x00000040 /* Host handles pkts w/ any GSO type */ #define VIRTIO_NET_GUEST_TSO4 0x00000080 /* Guest can handle TSOv4 in. */ #define VIRTIO_NET_GUEST_TSO6 0x00000100 /* Guest can handle TSOv6 in. */ #define VIRTIO_NET_GUEST_ECN 0x00000200 /* Guest can handle TSO[6] w/ ECN in. */ #define VIRTIO_NET_GUEST_UFO 0x00000400 /* Guest can handle UFO in. */ #define VIRTIO_NET_HOST_TSO4 0x00000800 /* Host can handle TSOv4 in. */ #define VIRTIO_NET_HOST_TSO6 0x00001000 /* Host can handle TSOv6 in. */ #define VIRTIO_NET_HOST_ECN 0x00002000 /* Host can handle TSO[6] w/ ECN in. */ #define VIRTIO_NET_HOST_UFO 0x00004000 /* Host can handle UFO in. */ #define VIRTIO_NET_MRG_RXBUF 0x00008000 /* Host can merge receive buffers. */ #define VIRTIO_NET_STATUS 0x00010000 /* virtio_net_config.status available */ #define VIRTIO_NET_CTRL_VQ 0x00020000 /* Control channel available */ #define VIRTIO_NET_CTRL_RX 0x00040000 /* Control channel RX mode support */ #define VIRTIO_NET_CTRL_VLAN 0x00080000 /* Control channel VLAN filtering */ /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static void *VirtioNetDevAlloc(PVIRTIODEVICE pDevice); static void VirtioNetDevFree(PVIRTIODEVICE pDevice); static int VirtioNetDevAttach(PVIRTIODEVICE pDevice); static int VirtioNetDevDetach(PVIRTIODEVICE pDevice); static int VirtioNetAttach(dev_info_t *pDip, ddi_attach_cmd_t Cmd); static int VirtioNetDetach(dev_info_t *pDip, ddi_detach_cmd_t Cmd); static int VirtioNetStat(void *pvArg, uint_t cmdStat, uint64_t *pu64Val); static int VirtioNetStart(void *pvArg); static void VirtioNetStop(void *pvArg); static int VirtioNetSetPromisc(void *pvArg, boolean_t fPromiscOn); static int VirtioNetSetMulticast(void *pvArg, boolean_t fAdd, const uint8_t *pbMac); static int VirtioNetSetUnicast(void *pvArg, const uint8_t *pbMac); static boolean_t VirtioNetGetCapab(void *pvArg, mac_capab_t Capab, void *pvCapabData); static mblk_t *VirtioNetXmit(void *pvArg, mblk_t *pMsg); static uint_t VirtioNetISR(caddr_t addrArg); static int VirtioNetAttachQueues(PVIRTIODEVICE pDevice); static void VirtioNetDetachQueues(PVIRTIODEVICE pDevice); /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** * Device operations for Virtio Net. */ VIRTIODEVICEOPS g_VirtioDeviceOpsNet = { VirtioNetDevAlloc, VirtioNetDevFree, VirtioNetDevAttach, VirtioNetDevDetach }; /** * virtio_net_t: Private data per Virtio Device. */ typedef struct virtio_net_t { mac_handle_t hMac; /* Handle to the MAC layer. */ RTMAC MacAddr; /* MAC address. */ PVIRTIOQUEUE pRxQueue; /* Receive Queue. */ PVIRTIOQUEUE pTxQueue; /* Xmit Queue. */ PVIRTIOQUEUE pCtrlQueue; /* Control Queue. */ kmem_cache_t *pTxCache; /* TX buffer cache. */ } virtio_net_t; /** * virtio_txbuf_t: Virtio Net TX buffer. */ typedef struct virtio_net_txbuf_t { ddi_dma_handle_t hDMA; /* DMA TX handle. */ } virtio_net_txbuf_t; /* * virtio_net_header_t: Virtio Net TX/RX buffer header. */ typedef struct virtio_net_header_t { uint8_t u8Flags; /* Flags. */ uint8_t u8GSOType; /* GSO type. */ uint16_t u16HdrLen; /* Length of this header. */ uint16_t u16GSOSize; /* GSO length if applicable. */ uint16_t u16CSumStart; /* Checksum start.*/ uint16_t u16CSumOffset; /* Checksum offset.*/ } virtio_net_header_t; /** * MAC layer hooks for VirtioNet. */ static mac_callbacks_t g_VirtioNetCallbacks = { MC_GETCAPAB, /* Mask of available extra hooks. */ VirtioNetStat, VirtioNetStart, VirtioNetStop, VirtioNetSetPromisc, VirtioNetSetMulticast, VirtioNetSetUnicast, VirtioNetXmit, NULL, /* Reserved. */ NULL, /* IOCtl. */ VirtioNetGetCapab, }; /** * DMA transfer attributes for Xmit/Recv. buffers. */ static ddi_dma_attr_t g_VirtioNetBufDmaAttr = { DMA_ATTR_V0, /* Version. */ 0, /* Lowest usable address. */ 0xffffffffffffffffULL, /* Highest usable address. */ 0x7fffffff, /* Maximum DMAable byte count. */ MMU_PAGESIZE, /* Alignment in bytes. */ 0x7ff, /* Bitmap of burst sizes */ 1, /* Minimum transfer. */ 0xffffffffU, /* Maximum transfer. */ 0xffffffffffffffffULL, /* Maximum segment length. */ 1, /* Maximum number of segments. */ 1, /* Granularity. */ 0 /* Flags (reserved). */ }; /** * cb_ops: driver char/block entry points */ static struct cb_ops g_VirtioNetCbOps = { nulldev, /* cb open */ nulldev, /* cb close */ nodev, /* b strategy */ nodev, /* b dump */ nodev, /* b print */ nodev, /* cb read */ nodev, /* cb write */ nodev, /* cb ioctl */ nodev, /* c devmap */ nodev, /* c mmap */ nodev, /* c segmap */ nochpoll, /* c poll */ ddi_prop_op, /* property ops */ NULL, /* streamtab */ D_MP, /* compat. flag */ CB_REV /* revision */ }; /** * dev_ops: driver entry/exit and other ops. */ static struct dev_ops g_VirtioNetDevOps = { DEVO_REV, /* driver build revision */ 0, /* ref count */ NULL, /* get info */ nulldev, /* identify */ nulldev, /* probe */ VirtioNetAttach, VirtioNetDetach, nodev, /* reset */ &g_VirtioNetCbOps, (struct bus_ops *)0, nodev /* power */ }; /** * modldrv: export driver specifics to kernel */ static struct modldrv g_VirtioNetDriver = { &mod_driverops, /* extern from kernel */ DEVICE_DESC_DRV " " VBOX_VERSION_STRING "r" RT_XSTR(VBOX_SVN_REV), &g_VirtioNetDevOps }; /** * modlinkage: export install/remove/info to the kernel */ static struct modlinkage g_VirtioNetModLinkage = { MODREV_1, /* loadable module system revision */ { &g_VirtioNetDriver, /* driver framework */ NULL /* terminate array of linkage structures */ } }; /** * Kernel entry points */ int _init(void) { LogFlowFunc((VIRTIOLOGNAME ":_init\n")); /* * Prevent module autounloading. */ modctl_t *pModCtl = mod_getctl(&g_VirtioNetModLinkage); if (pModCtl) pModCtl->mod_loadflags |= MOD_NOAUTOUNLOAD; else LogRel((VIRTIOLOGNAME ":failed to disable autounloading!\n")); /* * Initialize IPRT. */ int rc = RTR0Init(0); if (RT_SUCCESS(rc)) { /* * Initialize Solaris specific globals here. */ mac_init_ops(&g_VirtioNetDevOps, DEVICE_NAME); rc = mod_install(&g_VirtioNetModLinkage); if (!rc) return rc; LogRel((VIRTIOLOGNAME ":mod_install failed. rc=%d\n", rc)); mac_fini_ops(&g_VirtioNetDevOps); RTR0Term(); return rc; } else LogRel((VIRTIOLOGNAME ":failed to initialize IPRT (rc=%d)\n", rc)); return RTErrConvertToErrno(rc); } int _fini(void) { int rc; LogFlowFunc((VIRTIOLOGNAME ":_fini\n")); rc = mod_remove(&g_VirtioNetModLinkage); if (!rc) { mac_fini_ops(&g_VirtioNetDevOps); RTR0Term(); } return rc; } int _info(struct modinfo *pModInfo) { LogFlowFunc((VIRTIOLOGNAME ":_info\n")); int rc = mod_info(&g_VirtioNetModLinkage, pModInfo); LogFlow((VIRTIOLOGNAME ":_info returns %d\n", rc)); return rc; } /** * Attach entry point, to attach a device to the system or resume it. * * @param pDip The module structure instance. * @param Cmd Operation type (attach/resume). * * @return corresponding solaris error code. */ static int VirtioNetAttach(dev_info_t *pDip, ddi_attach_cmd_t Cmd) { return VirtioAttach(pDip, Cmd, &g_VirtioDeviceOpsNet, &g_VirtioHyperOpsPci); } /** * Detach entry point, to detach a device to the system or suspend it. * * @param pDip The module structure instance. * @param Cmd Operation type (detach/suspend). * * @return corresponding solaris error code. */ static int VirtioNetDetach(dev_info_t *pDip, ddi_detach_cmd_t Cmd) { return VirtioDetach(pDip, Cmd); } /** * Virtio Net TX buffer constructor for kmem_cache_create(). * * @param pvBuf Pointer to the allocated buffer. * @param pvArg Opaque private data. * @param fFlags Propagated KM flag values. * * @return 0 on success, or -1 on failure. */ static int VirtioNetTxBufCreate(void *pvBuf, void *pvArg, int fFlags) { virtio_net_txbuf_t *pTxBuf = pvBuf; PVIRTIODEVICE pDevice = pvArg; /** @todo ncookies handles? */ int rc = ddi_dma_alloc_handle(pDevice->pDip, &g_VirtioNetBufDmaAttr, fFlags & KM_NOSLEEP ? DDI_DMA_DONTWAIT : DDI_DMA_SLEEP, 0 /* Arg */, &pTxBuf->hDMA); if (rc == DDI_SUCCESS) return 0; return -1; } /** * Virtio Net TX buffer destructor for kmem_cache_create(). * * @param pvBuf Pointer to the allocated buffer. * @param pvArg */ static void VirtioNetTxBufDestroy(void *pvBuf, void *pvArg) { NOREF(pvArg); virtio_net_txbuf_t *pTxBuf = pvBuf; ddi_dma_free_handle(&pTxBuf->hDMA); } /** * Virtio Net private data allocation routine. * * @param pDevice Pointer to the Virtio device instance. * * @return Allocated private data that must only be freed by calling * VirtioNetDevFree(). */ static void *VirtioNetDevAlloc(PVIRTIODEVICE pDevice) { LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevAlloc pDevice=%p\n", pDevice)); AssertReturn(pDevice, NULL); virtio_net_t *pNet = RTMemAllocZ(sizeof(virtio_net_t)); if (RT_LIKELY(pNet)) { /* * Create a kernel memory cache for frequently allocated/deallocated * buffers. */ char szCachename[KSTAT_STRLEN]; RTStrPrintf(szCachename, sizeof(szCachename), "VirtioNet_Cache_%d", ddi_get_instance(pDevice->pDip)); pNet->pTxCache = kmem_cache_create(szCachename, /* Cache name */ sizeof(virtio_net_txbuf_t), /* Size of buffers in cache */ 0, /* Align */ VirtioNetTxBufCreate, /* Buffer constructor */ VirtioNetTxBufDestroy, /* Buffer destructor */ NULL, /* pfnReclaim */ pDevice, /* Private data */ NULL, /* "vmp", MBZ (man page) */ 0 /* "cflags", MBZ (man page) */ ); if (RT_LIKELY(pNet->pTxCache)) return pNet; else LogRel((VIRTIOLOGNAME ":kmem_cache_create failed.\n")); } else LogRel((VIRTIOLOGNAME ":failed to alloc %u bytes for Net instance.\n", sizeof(virtio_net_t))); return NULL; } /** * Virtio Net private data free routine. * * @param pDevice Pointer to the Virtio device instance. */ static void VirtioNetDevFree(PVIRTIODEVICE pDevice) { LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevFree pDevice=%p\n", pDevice)); AssertReturnVoid(pDevice); virtio_net_t *pNet = pDevice->pvDevice; kmem_cache_destroy(pNet->pTxCache); RTMemFree(pNet); pDevice->pvDevice = NULL; } /** * Virtio Net device attach rountine. * * @param pDevice Pointer to the Virtio device instance. * * @return corresponding solaris error code. */ static int VirtioNetDevAttach(PVIRTIODEVICE pDevice) { LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevAttach pDevice=%p\n", pDevice)); virtio_net_t *pNet = pDevice->pvDevice; mac_register_t *pMacRegHandle = mac_alloc(MAC_VERSION); if (pMacRegHandle) { pMacRegHandle->m_driver = pDevice; pMacRegHandle->m_dip = pDevice->pDip; pMacRegHandle->m_callbacks = &g_VirtioNetCallbacks; pMacRegHandle->m_type_ident = MAC_PLUGIN_IDENT_ETHER; pMacRegHandle->m_min_sdu = 0; pMacRegHandle->m_max_sdu = 1500; /** @todo verify */ /** @todo should we set the margin size? */ pMacRegHandle->m_src_addr = pNet->MacAddr.au8; /* * Get MAC from the host or generate a random MAC address. */ if (pDevice->fHostFeatures & VIRTIO_NET_MAC) { pDevice->pHyperOps->pfnGet(pDevice, 0 /* offset */, &pNet->MacAddr.au8, sizeof(pNet->MacAddr)); LogFlow((VIRTIOLOGNAME ":VirtioNetDevAttach: Obtained MAC address from host: %.6Rhxs\n", pNet->MacAddr.au8)); } else { pNet->MacAddr.au8[0] = 0x08; pNet->MacAddr.au8[1] = 0x00; pNet->MacAddr.au8[2] = 0x27; RTRandBytes(&pNet->MacAddr.au8[3], 3); LogFlow((VIRTIOLOGNAME ":VirtioNetDevAttach: Generated MAC address %.6Rhxs\n", pNet->MacAddr.au8)); } int rc = VirtioNetAttachQueues(pDevice); if (rc == DDI_SUCCESS) { rc = mac_register(pMacRegHandle, &pNet->hMac); if (rc == 0) { mac_link_update(pNet->hMac, LINK_STATE_DOWN); mac_free(pMacRegHandle); LogFlow((VIRTIOLOGNAME ":VirtioNetDevAttach: successfully registered mac.\n")); return DDI_SUCCESS; } else LogRel((VIRTIOLOGNAME ":VirtioNetDevAttach: mac_register failed. rc=%d\n", rc)); VirtioNetDetachQueues(pDevice); } else LogRel((VIRTIOLOGNAME ":VirtioNetDevAttach: VirtioNetAttachQueues failed. rc=%d\n", rc)); mac_free(pMacRegHandle); } else LogRel((VIRTIOLOGNAME ":VirtioNetDevAttach: mac_alloc failed. Invalid version!?!\n")); return DDI_FAILURE; } /** * Virtio Net device detach routine. * * @param pDevice Pointer to the Virtio device instance. * * @return corresponding solaris error code. */ static int VirtioNetDevDetach(PVIRTIODEVICE pDevice) { LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDevDetach pDevice=%p\n", pDevice)); virtio_net_t *pNet = pDevice->pvDevice; int rc = mac_unregister(pNet->hMac); if (rc == 0) { VirtioNetDetachQueues(pDevice); return DDI_SUCCESS; } else LogRel((VIRTIOLOGNAME ":VirtioNetDevDetach: mac_unregister failed. rc=%d\n", rc)); return DDI_FAILURE; } /** * Attach the Virtio Net TX, RX and control queues. * * @param pDevice Pointer to the Virtio device instance. * * @return corresponding solaris error code. */ static int VirtioNetAttachQueues(PVIRTIODEVICE pDevice) { LogFlowFunc((VIRTIOLOGNAME ":VirtioNetAttachQueues pDevice=%p\n", pDevice)); virtio_net_t *pNet = pDevice->pvDevice; pNet->pRxQueue = VirtioGetQueue(pDevice, 0 /* index */ ); if (pNet->pRxQueue) { pNet->pTxQueue = VirtioGetQueue(pDevice, 1 /* index */); if (pNet->pTxQueue) { if (pDevice->fHostFeatures & VIRTIO_NET_CTRL_VQ) { pNet->pCtrlQueue = VirtioGetQueue(pDevice, 2 /* index */); if (pNet->pCtrlQueue) { LogFlow((VIRTIOLOGNAME ":VirtioNetAttachQueues successfully obtained 3 queues.\n")); return DDI_SUCCESS; } else LogRel((VIRTIOLOGNAME ":VirtioNetAttachQueues: failed to get Control queue.\n")); } else { LogFlow((VIRTIOLOGNAME ":VirtioNetAttachQueues successfully obtained 2 queues.\n")); return DDI_SUCCESS; } VirtioPutQueue(pDevice, pNet->pTxQueue); pNet->pTxQueue = NULL; } else LogRel((VIRTIOLOGNAME ":VirtioNetAttachQueues: failed to get TX queue.\n")); VirtioPutQueue(pDevice, pNet->pRxQueue); pNet->pRxQueue = NULL; } else LogRel((VIRTIOLOGNAME ":VirtioNetAttachQueues: failed to get RX queue.\n")); return DDI_FAILURE; } /** * Detach the Virtio Net TX, RX and control queues. * * @param pDevice Pointer to the Virtio device instance. */ static void VirtioNetDetachQueues(PVIRTIODEVICE pDevice) { LogFlowFunc((VIRTIOLOGNAME ":VirtioNetDetachQueues pDevice=%p\n", pDevice)); virtio_net_t *pNet = pDevice->pvDevice; if ( pDevice->fHostFeatures & VIRTIO_NET_CTRL_VQ && pNet->pCtrlQueue) VirtioPutQueue(pDevice, pNet->pCtrlQueue); if (pNet->pTxCache) VirtioPutQueue(pDevice, pNet->pTxQueue); if (pNet->pRxQueue) VirtioPutQueue(pDevice, pNet->pRxQueue); } /* -=-=-=-=- Virtio Net MAC layer callbacks -=-=-=-=- */ /** * Virtio Net statistics. * * @param pvArg Pointer to private data. * @param cmdStat Which statistics to provide. * @param pu64Val Where to write statistics data. * * @return corresponding solaris error code. */ static int VirtioNetStat(void *pvArg, uint_t cmdStat, uint64_t *pu64Val) { NOREF(pvArg); NOREF(cmdStat); NOREF(pu64Val); return ENOTSUP; } /** * Virtio Net Start. * * @param pvArg Pointer to private data. * * @return corresponding solaris error code. */ static int VirtioNetStart(void *pvArg) { PVIRTIODEVICE pDevice = pvArg; virtio_net_t *pNet = pDevice->pvDevice; mac_link_update(pNet->hMac, LINK_STATE_UP); pDevice->pHyperOps->pfnSetStatus(pDevice, VIRTIO_PCI_STATUS_DRV_OK); return 0; } /** * Virtio Net Stop. * * @param pvArg Pointer to private data. */ static void VirtioNetStop(void *pvArg) { PVIRTIODEVICE pDevice = pvArg; virtio_net_t *pNet = pDevice->pvDevice; mac_link_update(pNet->hMac, LINK_STATE_DOWN); /* * I don't think we should set status here as the host checks the status on every Xmit. This means pending Xmits * would also be dropped. * @todo: Not sure what's the best way to signal connect/disconnect of the link to the host. Figure it out. */ } /** * Virtio Net toggle Promiscuous mode. * * @param pvArg Pointer to private data. * @param fPromiscOn Promiscuous On/Off. * * @return corresponding solaris error code. */ static int VirtioNetSetPromisc(void *pvArg, boolean_t fPromiscOn) { NOREF(pvArg); NOREF(fPromiscOn); return 0; } /** * Virtio Net set/add multicast address. * * @param pvArg Pointer to private data. * @param fAdd Whether to add multicast address or not. * @param pbMac Pointer to the multicast MAC address to set/add. * * @return corresponding solaris error code. */ static int VirtioNetSetMulticast(void *pvArg, boolean_t fAdd, const uint8_t *pbMac) { NOREF(pvArg); NOREF(fAdd); NOREF(pbMac); return 1; } /** * Virtio Net set unicast address. * * @param pvArg Pointer to private data. * @param pbMac Pointer to the unicast MAC address to set. * * @return corresponding solaris error code. */ static int VirtioNetSetUnicast(void *pvArg, const uint8_t *pbMac) { NOREF(pvArg); NOREF(pbMac); return ENOTSUP; } /** * Virtio Net get capabilities hook. * * @param pvArg Pointer to private data. * @param Capab MAC layer capabilities. * @param pvCapabData Pointer to store capability info. * * @return B_TRUE upon success, otherwise B_FALSE. */ static boolean_t VirtioNetGetCapab(void *pvArg, mac_capab_t Capab, void *pvCapabData) { NOREF(pvArg); NOREF(Capab); NOREF(pvCapabData); return B_FALSE; } /** * Virtio Net Xmit hook. * * @param pvArg Pointer to private data. * @param pMsg Pointer to the message. * * @return Pointer to message not Xmited. */ static mblk_t *VirtioNetXmit(void *pvArg, mblk_t *pMsg) { LogFlowFunc((VIRTIOLOGNAME ":VirtioNetXmit pMsg=%p\n", pMsg)); cmn_err(CE_NOTE, "Xmit pMsg=%p\n", pMsg); PVIRTIODEVICE pDevice = pvArg; virtio_net_t *pNet = pDevice->pvDevice; bool fNotify = false; while (pMsg) { mblk_t *pNextMsg = pMsg->b_next; #if 0 mblk_t *pHdr = allocb(sizeof(virtio_net_header_t), BPRI_HI); if (RT_UNLIKELY(!pHdr)) break; virtio_net_header_t *pNetHdr = pHdr->b_rptr; memset(pNetHdr, 0, sizeof(virtio_net_header_t)); pNetHdr->u8Flags = VIRTIO_NET_GUEST_CSUM; pNetHdr->u16HdrLen = sizeof(virtio_net_header_t); pHdr->b_wptr += sizeof(virtio_net_header_t); pHdr->b_cont = pMsg; #endif virtio_net_txbuf_t *pTxBuf = kmem_cache_alloc(pNet->pTxCache, KM_SLEEP); if (!pTxBuf) break; ddi_dma_cookie_t DmaCookie; uint_t cCookies; int rc = ddi_dma_addr_bind_handle(pTxBuf->hDMA, NULL /* addrspace */, (char *)pMsg->b_rptr, MBLKL(pMsg), DDI_DMA_WRITE | DDI_DMA_STREAMING, DDI_DMA_SLEEP, 0 /* addr */, &DmaCookie, &cCookies); cmn_err(CE_NOTE, "VirtioNetXmit: MBLKL pMsg=%u\n", MBLKL(pMsg)); if (rc != DDI_DMA_MAPPED) { LogRel((VIRTIOLOGNAME ":VirtioNetXmit failed to map address to DMA handle. rc=%d\n", rc)); kmem_cache_free(pNet->pTxCache, pTxBuf); break; } /** @todo get 'cCookies' slots from the ring. */ for (uint_t i = 0; i < cCookies; i++) { uint16_t fFlags = 0; if (i < cCookies - 1) fFlags |= VIRTIO_FLAGS_RING_DESC_NEXT; rc = VirtioRingPush(pNet->pTxQueue, DmaCookie.dmac_laddress, DmaCookie.dmac_size, fFlags); if (RT_FAILURE(rc)) { LogRel((VIRTIOLOGNAME ":VirtioNetXmit failed. rc=%Rrc\n", rc)); break; } ddi_dma_nextcookie(pTxBuf->hDMA, &DmaCookie); } pMsg = pNextMsg; fNotify = true; if (RT_FAILURE(rc)) { ddi_dma_unbind_handle(pTxBuf->hDMA); break; } } if (fNotify) pDevice->pHyperOps->pfnNotifyQueue(pDevice, pNet->pTxQueue); return pMsg; } /** * Interrupt Service Routine for Virtio Net. * * @param Arg Private data (unused, will be NULL). * @returns DDI_INTR_CLAIMED if it's our interrupt, DDI_INTR_UNCLAIMED if it isn't. */ static uint_t VirtioNetISR(caddr_t Arg) { cmn_err(CE_NOTE, "VirtioNetISR Arg=%p\n", Arg); NOREF(Arg); return DDI_INTR_UNCLAIMED; }