diff options
Diffstat (limited to 'drivers/staging/hv/netvsc.c')
| -rw-r--r-- | drivers/staging/hv/netvsc.c | 1356 |
1 files changed, 0 insertions, 1356 deletions
diff --git a/drivers/staging/hv/netvsc.c b/drivers/staging/hv/netvsc.c deleted file mode 100644 index 0edbe7483a4..00000000000 --- a/drivers/staging/hv/netvsc.c +++ /dev/null @@ -1,1356 +0,0 @@ -/* - * Copyright (c) 2009, Microsoft Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 Temple - * Place - Suite 330, Boston, MA 02111-1307 USA. - * - * Authors: - * Haiyang Zhang <haiyangz@microsoft.com> - * Hank Janssen <hjanssen@microsoft.com> - */ -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/slab.h> -#include "osd.h" -#include "logging.h" -#include "netvsc.h" -#include "rndis_filter.h" -#include "channel.h" - - -/* Globals */ -static const char *driver_name = "netvsc"; - -/* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ -static const struct hv_guid netvsc_device_type = { - .data = { - 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, - 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E - } -}; - -static int netvsc_device_add(struct hv_device *device, void *additional_info); - -static int netvsc_device_remove(struct hv_device *device); - -static void netvsc_cleanup(struct hv_driver *driver); - -static void netvsc_channel_cb(void *context); - -static int netvsc_init_send_buf(struct hv_device *device); - -static int netvsc_init_recv_buf(struct hv_device *device); - -static int netvsc_destroy_send_buf(struct netvsc_device *net_device); - -static int netvsc_destroy_recv_buf(struct netvsc_device *net_device); - -static int netvsc_connect_vsp(struct hv_device *device); - -static void netvsc_send_completion(struct hv_device *device, - struct vmpacket_descriptor *packet); - -static int netvsc_send(struct hv_device *device, - struct hv_netvsc_packet *packet); - -static void netvsc_receive(struct hv_device *device, - struct vmpacket_descriptor *packet); - -static void netvsc_receive_completion(void *context); - -static void netvsc_send_recv_completion(struct hv_device *device, - u64 transaction_id); - - -static struct netvsc_device *alloc_net_device(struct hv_device *device) -{ - struct netvsc_device *net_device; - - net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); - if (!net_device) - return NULL; - - /* Set to 2 to allow both inbound and outbound traffic */ - atomic_cmpxchg(&net_device->refcnt, 0, 2); - - net_device->dev = device; - device->Extension = net_device; - - return net_device; -} - -static void free_net_device(struct netvsc_device *device) -{ - WARN_ON(atomic_read(&device->refcnt) == 0); - device->dev->Extension = NULL; - kfree(device); -} - - -/* Get the net device object iff exists and its refcount > 1 */ -static struct netvsc_device *get_outbound_net_device(struct hv_device *device) -{ - struct netvsc_device *net_device; - - net_device = device->Extension; - if (net_device && atomic_read(&net_device->refcnt) > 1) - atomic_inc(&net_device->refcnt); - else - net_device = NULL; - - return net_device; -} - -/* Get the net device object iff exists and its refcount > 0 */ -static struct netvsc_device *get_inbound_net_device(struct hv_device *device) -{ - struct netvsc_device *net_device; - - net_device = device->Extension; - if (net_device && atomic_read(&net_device->refcnt)) - atomic_inc(&net_device->refcnt); - else - net_device = NULL; - - return net_device; -} - -static void put_net_device(struct hv_device *device) -{ - struct netvsc_device *net_device; - - net_device = device->Extension; - /* ASSERT(netDevice); */ - - atomic_dec(&net_device->refcnt); -} - -static struct netvsc_device *release_outbound_net_device( - struct hv_device *device) -{ - struct netvsc_device *net_device; - - net_device = device->Extension; - if (net_device == NULL) - return NULL; - - /* Busy wait until the ref drop to 2, then set it to 1 */ - while (atomic_cmpxchg(&net_device->refcnt, 2, 1) != 2) - udelay(100); - - return net_device; -} - -static struct netvsc_device *release_inbound_net_device( - struct hv_device *device) -{ - struct netvsc_device *net_device; - - net_device = device->Extension; - if (net_device == NULL) - return NULL; - - /* Busy wait until the ref drop to 1, then set it to 0 */ - while (atomic_cmpxchg(&net_device->refcnt, 1, 0) != 1) - udelay(100); - - device->Extension = NULL; - return net_device; -} - -/* - * netvsc_initialize - Main entry point - */ -int netvsc_initialize(struct hv_driver *drv) -{ - struct netvsc_driver *driver = (struct netvsc_driver *)drv; - - DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, " - "sizeof(struct nvsp_message)=%zd, " - "sizeof(struct vmtransfer_page_packet_header)=%zd", - sizeof(struct hv_netvsc_packet), - sizeof(struct nvsp_message), - sizeof(struct vmtransfer_page_packet_header)); - - /* Make sure we are at least 2 pages since 1 page is used for control */ - /* ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); */ - - drv->name = driver_name; - memcpy(&drv->deviceType, &netvsc_device_type, sizeof(struct hv_guid)); - - /* Make sure it is set by the caller */ - /* FIXME: These probably should still be tested in some way */ - /* ASSERT(driver->OnReceiveCallback); */ - /* ASSERT(driver->OnLinkStatusChanged); */ - - /* Setup the dispatch table */ - driver->base.OnDeviceAdd = netvsc_device_add; - driver->base.OnDeviceRemove = netvsc_device_remove; - driver->base.OnCleanup = netvsc_cleanup; - - driver->send = netvsc_send; - - rndis_filter_init(driver); - return 0; -} - -static int netvsc_init_recv_buf(struct hv_device *device) -{ - int ret = 0; - struct netvsc_device *net_device; - struct nvsp_message *init_packet; - - net_device = get_outbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - return -1; - } - /* ASSERT(netDevice->ReceiveBufferSize > 0); */ - /* page-size grandularity */ - /* ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE - 1)) == 0); */ - - net_device->recv_buf = - osd_page_alloc(net_device->recv_buf_size >> PAGE_SHIFT); - if (!net_device->recv_buf) { - DPRINT_ERR(NETVSC, - "unable to allocate receive buffer of size %d", - net_device->recv_buf_size); - ret = -1; - goto Cleanup; - } - /* page-aligned buffer */ - /* ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE - 1)) == */ - /* 0); */ - - DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); - - /* - * Establish the gpadl handle for this buffer on this - * channel. Note: This call uses the vmbus connection rather - * than the channel to establish the gpadl handle. - */ - ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, - net_device->recv_buf_size, - &net_device->recv_buf_gpadl_handle); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to establish receive buffer's gpadl"); - goto Cleanup; - } - - /* osd_waitevent_wait(ext->ChannelInitEvent); */ - - /* Notify the NetVsp of the gpadl handle */ - DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); - - init_packet = &net_device->channel_init_pkt; - - memset(init_packet, 0, sizeof(struct nvsp_message)); - - init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; - init_packet->msg.v1_msg.send_recv_buf. - gpadl_handle = net_device->recv_buf_gpadl_handle; - init_packet->msg.v1_msg. - send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; - - /* Send the gpadl notification request */ - ret = vmbus_sendpacket(device->channel, init_packet, - sizeof(struct nvsp_message), - (unsigned long)init_packet, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to send receive buffer's gpadl to netvsp"); - goto Cleanup; - } - - osd_waitevent_wait(net_device->channel_init_event); - - /* Check the response */ - if (init_packet->msg.v1_msg. - send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { - DPRINT_ERR(NETVSC, "Unable to complete receive buffer " - "initialzation with NetVsp - status %d", - init_packet->msg.v1_msg. - send_recv_buf_complete.status); - ret = -1; - goto Cleanup; - } - - /* Parse the response */ - /* ASSERT(netDevice->ReceiveSectionCount == 0); */ - /* ASSERT(netDevice->ReceiveSections == NULL); */ - - net_device->recv_section_cnt = init_packet->msg. - v1_msg.send_recv_buf_complete.num_sections; - - net_device->recv_section = kmalloc(net_device->recv_section_cnt - * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); - if (net_device->recv_section == NULL) { - ret = -1; - goto Cleanup; - } - - memcpy(net_device->recv_section, - init_packet->msg.v1_msg. - send_recv_buf_complete.sections, - net_device->recv_section_cnt * - sizeof(struct nvsp_1_receive_buffer_section)); - - DPRINT_INFO(NETVSC, "Receive sections info (count %d, offset %d, " - "endoffset %d, suballoc size %d, num suballocs %d)", - net_device->recv_section_cnt, - net_device->recv_section[0].offset, - net_device->recv_section[0].end_offset, - net_device->recv_section[0].sub_alloc_size, - net_device->recv_section[0].num_sub_allocs); - - /* - * For 1st release, there should only be 1 section that represents the - * entire receive buffer - */ - if (net_device->recv_section_cnt != 1 || - net_device->recv_section->offset != 0) { - ret = -1; - goto Cleanup; - } - - goto Exit; - -Cleanup: - netvsc_destroy_recv_buf(net_device); - -Exit: - put_net_device(device); - return ret; -} - -static int netvsc_init_send_buf(struct hv_device *device) -{ - int ret = 0; - struct netvsc_device *net_device; - struct nvsp_message *init_packet; - - net_device = get_outbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - return -1; - } - if (net_device->send_buf_size <= 0) { - ret = -EINVAL; - goto Cleanup; - } - - /* page-size grandularity */ - /* ASSERT((netDevice->SendBufferSize & (PAGE_SIZE - 1)) == 0); */ - - net_device->send_buf = - osd_page_alloc(net_device->send_buf_size >> PAGE_SHIFT); - if (!net_device->send_buf) { - DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", - net_device->send_buf_size); - ret = -1; - goto Cleanup; - } - /* page-aligned buffer */ - /* ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE - 1)) == 0); */ - - DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); - - /* - * Establish the gpadl handle for this buffer on this - * channel. Note: This call uses the vmbus connection rather - * than the channel to establish the gpadl handle. - */ - ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, - net_device->send_buf_size, - &net_device->send_buf_gpadl_handle); - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); - goto Cleanup; - } - - /* osd_waitevent_wait(ext->ChannelInitEvent); */ - - /* Notify the NetVsp of the gpadl handle */ - DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); - - init_packet = &net_device->channel_init_pkt; - - memset(init_packet, 0, sizeof(struct nvsp_message)); - - init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; - init_packet->msg.v1_msg.send_recv_buf. - gpadl_handle = net_device->send_buf_gpadl_handle; - init_packet->msg.v1_msg.send_recv_buf.id = - NETVSC_SEND_BUFFER_ID; - - /* Send the gpadl notification request */ - ret = vmbus_sendpacket(device->channel, init_packet, - sizeof(struct nvsp_message), - (unsigned long)init_packet, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to send receive buffer's gpadl to netvsp"); - goto Cleanup; - } - - osd_waitevent_wait(net_device->channel_init_event); - - /* Check the response */ - if (init_packet->msg.v1_msg. - send_send_buf_complete.status != NVSP_STAT_SUCCESS) { - DPRINT_ERR(NETVSC, "Unable to complete send buffer " - "initialzation with NetVsp - status %d", - init_packet->msg.v1_msg. - send_send_buf_complete.status); - ret = -1; - goto Cleanup; - } - - net_device->send_section_size = init_packet-> - msg.v1_msg.send_send_buf_complete.section_size; - - goto Exit; - -Cleanup: - netvsc_destroy_send_buf(net_device); - -Exit: - put_net_device(device); - return ret; -} - -static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) -{ - struct nvsp_message *revoke_packet; - int ret = 0; - - /* - * If we got a section count, it means we received a - * SendReceiveBufferComplete msg (ie sent - * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need - * to send a revoke msg here - */ - if (net_device->recv_section_cnt) { - DPRINT_INFO(NETVSC, - "Sending NvspMessage1TypeRevokeReceiveBuffer..."); - - /* Send the revoke receive buffer */ - revoke_packet = &net_device->revoke_packet; - memset(revoke_packet, 0, sizeof(struct nvsp_message)); - - revoke_packet->hdr.msg_type = - NVSP_MSG1_TYPE_REVOKE_RECV_BUF; - revoke_packet->msg.v1_msg. - revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; - - ret = vmbus_sendpacket(net_device->dev->channel, - revoke_packet, - sizeof(struct nvsp_message), - (unsigned long)revoke_packet, - VmbusPacketTypeDataInBand, 0); - /* - * If we failed here, we might as well return and - * have a leak rather than continue and a bugchk - */ - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to send revoke receive " - "buffer to netvsp"); - return -1; - } - } - - /* Teardown the gpadl on the vsp end */ - if (net_device->recv_buf_gpadl_handle) { - DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); - - ret = vmbus_teardown_gpadl(net_device->dev->channel, - net_device->recv_buf_gpadl_handle); - - /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to teardown receive buffer's gpadl"); - return -1; - } - net_device->recv_buf_gpadl_handle = 0; - } - - if (net_device->recv_buf) { - DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); - - /* Free up the receive buffer */ - osd_page_free(net_device->recv_buf, - net_device->recv_buf_size >> PAGE_SHIFT); - net_device->recv_buf = NULL; - } - - if (net_device->recv_section) { - net_device->recv_section_cnt = 0; - kfree(net_device->recv_section); - net_device->recv_section = NULL; - } - - return ret; -} - -static int netvsc_destroy_send_buf(struct netvsc_device *net_device) -{ - struct nvsp_message *revoke_packet; - int ret = 0; - - /* - * If we got a section count, it means we received a - * SendReceiveBufferComplete msg (ie sent - * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need - * to send a revoke msg here - */ - if (net_device->send_section_size) { - DPRINT_INFO(NETVSC, - "Sending NvspMessage1TypeRevokeSendBuffer..."); - - /* Send the revoke send buffer */ - revoke_packet = &net_device->revoke_packet; - memset(revoke_packet, 0, sizeof(struct nvsp_message)); - - revoke_packet->hdr.msg_type = - NVSP_MSG1_TYPE_REVOKE_SEND_BUF; - revoke_packet->msg.v1_msg. - revoke_send_buf.id = NETVSC_SEND_BUFFER_ID; - - ret = vmbus_sendpacket(net_device->dev->channel, - revoke_packet, - sizeof(struct nvsp_message), - (unsigned long)revoke_packet, - VmbusPacketTypeDataInBand, 0); - /* - * If we failed here, we might as well return and have a leak - * rather than continue and a bugchk - */ - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to send revoke send buffer " - "to netvsp"); - return -1; - } - } - - /* Teardown the gpadl on the vsp end */ - if (net_device->send_buf_gpadl_handle) { - DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); - ret = vmbus_teardown_gpadl(net_device->dev->channel, - net_device->send_buf_gpadl_handle); - - /* - * If we failed here, we might as well return and have a leak - * rather than continue and a bugchk - */ - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to teardown send buffer's " - "gpadl"); - return -1; - } - net_device->send_buf_gpadl_handle = 0; - } - - if (net_device->send_buf) { - DPRINT_INFO(NETVSC, "Freeing up send buffer..."); - - /* Free up the receive buffer */ - osd_page_free(net_device->send_buf, - net_device->send_buf_size >> PAGE_SHIFT); - net_device->send_buf = NULL; - } - - return ret; -} - - -static int netvsc_connect_vsp(struct hv_device *device) -{ - int ret; - struct netvsc_device *net_device; - struct nvsp_message *init_packet; - int ndis_version; - - net_device = get_outbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - return -1; - } - - init_packet = &net_device->channel_init_pkt; - - memset(init_packet, 0, sizeof(struct nvsp_message)); - init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; - init_packet->msg.init_msg.init.min_protocol_ver = - NVSP_MIN_PROTOCOL_VERSION; - init_packet->msg.init_msg.init.max_protocol_ver = - NVSP_MAX_PROTOCOL_VERSION; - - DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); - - /* Send the init request */ - ret = vmbus_sendpacket(device->channel, init_packet, - sizeof(struct nvsp_message), - (unsigned long)init_packet, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); - goto Cleanup; - } - - osd_waitevent_wait(net_device->channel_init_event); - - /* Now, check the response */ - /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ - DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", - init_packet->msg.init_msg.init_complete.status, - init_packet->msg.init_msg. - init_complete.max_mdl_chain_len); - - if (init_packet->msg.init_msg.init_complete.status != - NVSP_STAT_SUCCESS) { - DPRINT_ERR(NETVSC, - "unable to initialize with netvsp (status 0x%x)", - init_packet->msg.init_msg.init_complete.status); - ret = -1; - goto Cleanup; - } - - if (init_packet->msg.init_msg.init_complete. - negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) { - DPRINT_ERR(NETVSC, "unable to initialize with netvsp " - "(version expected 1 got %d)", - init_packet->msg.init_msg. - init_complete.negotiated_protocol_ver); - ret = -1; - goto Cleanup; - } - DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); - - /* Send the ndis version */ - memset(init_packet, 0, sizeof(struct nvsp_message)); - - ndis_version = 0x00050000; - - init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; - init_packet->msg.v1_msg. - send_ndis_ver.ndis_major_ver = - (ndis_version & 0xFFFF0000) >> 16; - init_packet->msg.v1_msg. - send_ndis_ver.ndis_minor_ver = - ndis_version & 0xFFFF; - - /* Send the init request */ - ret = vmbus_sendpacket(device->channel, init_packet, - sizeof(struct nvsp_message), - (unsigned long)init_packet, - VmbusPacketTypeDataInBand, 0); - if (ret != 0) { - DPRINT_ERR(NETVSC, - "unable to send NvspMessage1TypeSendNdisVersion"); - ret = -1; - goto Cleanup; - } - /* - * BUGBUG - We have to wait for the above msg since the - * netvsp uses KMCL which acknowledges packet (completion - * packet) since our Vmbus always set the - * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag - */ - /* osd_waitevent_wait(NetVscChannel->ChannelInitEvent); */ - - /* Post the big receive buffer to NetVSP */ - ret = netvsc_init_recv_buf(device); - if (ret == 0) - ret = netvsc_init_send_buf(device); - -Cleanup: - put_net_device(device); - return ret; -} - -static void NetVscDisconnectFromVsp(struct netvsc_device *net_device) -{ - netvsc_destroy_recv_buf(net_device); - netvsc_destroy_send_buf(net_device); -} - -/* - * netvsc_device_add - Callback when the device belonging to this - * driver is added - */ -static int netvsc_device_add(struct hv_device *device, void *additional_info) -{ - int ret = 0; - int i; - struct netvsc_device *net_device; - struct hv_netvsc_packet *packet, *pos; - struct netvsc_driver *net_driver = - (struct netvsc_driver *)device->Driver; - - net_device = alloc_net_device(device); - if (!net_device) { - ret = -1; - goto Cleanup; - } - - DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", net_device); - - /* Initialize the NetVSC channel extension */ - net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; - spin_lock_init(&net_device->recv_pkt_list_lock); - - net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; - - INIT_LIST_HEAD(&net_device->recv_pkt_list); - - for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { - packet = kzalloc(sizeof(struct hv_netvsc_packet) + - (NETVSC_RECEIVE_SG_COUNT * - sizeof(struct hv_page_buffer)), GFP_KERNEL); - if (!packet) { - DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts " - "for receive pool (wanted %d got %d)", - NETVSC_RECEIVE_PACKETLIST_COUNT, i); - break; - } - list_add_tail(&packet->list_ent, - &net_device->recv_pkt_list); - } - net_device->channel_init_event = osd_waitevent_create(); - if (!net_device->channel_init_event) { - ret = -ENOMEM; - goto Cleanup; - } - - /* Open the channel */ - ret = vmbus_open(device->channel, net_driver->ring_buf_size, - net_driver->ring_buf_size, NULL, 0, - netvsc_channel_cb, device); - - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); - ret = -1; - goto Cleanup; - } - - /* Channel is opened */ - DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); - - /* Connect with the NetVsp */ - ret = netvsc_connect_vsp(device); - if (ret != 0) { - DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); - ret = -1; - goto close; - } - - DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", - ret); - - return ret; - -close: - /* Now, we can close the channel safely */ - vmbus_close(device->channel); - -Cleanup: - - if (net_device) { - kfree(net_device->channel_init_event); - - list_for_each_entry_safe(packet, pos, - &net_device->recv_pkt_list, - list_ent) { - list_del(&packet->list_ent); - kfree(packet); - } - - release_outbound_net_device(device); - release_inbound_net_device(device); - - free_net_device(net_device); - } - - return ret; -} - -/* - * netvsc_device_remove - Callback when the root bus device is removed - */ -static int netvsc_device_remove(struct hv_device *device) -{ - struct netvsc_device *net_device; - struct hv_netvsc_packet *netvsc_packet, *pos; - - DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", - device->Extension); - - /* Stop outbound traffic ie sends and receives completions */ - net_device = release_outbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "No net device present!!"); - return -1; - } - - /* Wait for all send completions */ - while (atomic_read(&net_device->num_outstanding_sends)) { - DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", - atomic_read(&net_device->num_outstanding_sends)); - udelay(100); - } - - DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); - - NetVscDisconnectFromVsp(net_device); - - DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", - device->Extension); - - /* Stop inbound traffic ie receives and sends completions */ - net_device = release_inbound_net_device(device); - - /* At this point, no one should be accessing netDevice except in here */ - DPRINT_INFO(NETVSC, "net device (%p) safe to remove", net_device); - - /* Now, we can close the channel safely */ - vmbus_close(device->channel); - - /* Release all resources */ - list_for_each_entry_safe(netvsc_packet, pos, - &net_device->recv_pkt_list, list_ent) { - list_del(&netvsc_packet->list_ent); - kfree(netvsc_packet); - } - - kfree(net_device->channel_init_event); - free_net_device(net_device); - return 0; -} - -/* - * netvsc_cleanup - Perform any cleanup when the driver is removed - */ -static void netvsc_cleanup(struct hv_driver *drv) -{ -} - -static void netvsc_send_completion(struct hv_device *device, - struct vmpacket_descriptor *packet) -{ - struct netvsc_device *net_device; - struct nvsp_message *nvsp_packet; - struct hv_netvsc_packet *nvsc_packet; - - net_device = get_inbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - return; - } - - nvsp_packet = (struct nvsp_message *)((unsigned long)packet + - (packet->DataOffset8 << 3)); - - DPRINT_DBG(NETVSC, "send completion packet - type %d", - nvsp_packet->hdr.msg_type); - - if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || - (nvsp_packet->hdr.msg_type == - NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || - (nvsp_packet->hdr.msg_type == - NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) { - /* Copy the response back */ - memcpy(&net_device->channel_init_pkt, nvsp_packet, - sizeof(struct nvsp_message)); - osd_waitevent_set(net_device->channel_init_event); - } else if (nvsp_packet->hdr.msg_type == - NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { - /* Get the send context */ - nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) - packet->TransactionId; - /* ASSERT(nvscPacket); */ - - /* Notify the layer above us */ - nvsc_packet->completion.send.send_completion( - nvsc_packet->completion.send.send_completion_ctx); - - atomic_dec(&net_device->num_outstanding_sends); - } else { - DPRINT_ERR(NETVSC, "Unknown send completion packet type - " - "%d received!!", nvsp_packet->hdr.msg_type); - } - - put_net_device(device); -} - -static int netvsc_send(struct hv_device *device, - struct hv_netvsc_packet *packet) -{ - struct netvsc_device *net_device; - int ret = 0; - - struct nvsp_message sendMessage; - - net_device = get_outbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "net device (%p) shutting down..." - "ignoring outbound packets", net_device); - return -2; - } - - sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; - if (packet->is_data_pkt) { - /* 0 is RMC_DATA; */ - sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; - } else { - /* 1 is RMC_CONTROL; */ - sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; - } - - /* Not using send buffer section */ - sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = - 0xFFFFFFFF; - sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; - - if (packet->page_buf_cnt) { - ret = vmbus_sendpacket_pagebuffer(device->channel, - packet->page_buf, - packet->page_buf_cnt, - &sendMessage, - sizeof(struct nvsp_message), - (unsigned long)packet); - } else { - ret = vmbus_sendpacket(device->channel, &sendMessage, - sizeof(struct nvsp_message), - (unsigned long)packet, - VmbusPacketTypeDataInBand, - VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - - } - - if (ret != 0) - DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", - packet, ret); - - atomic_inc(&net_device->num_outstanding_sends); - put_net_device(device); - return ret; -} - -static void netvsc_receive(struct hv_device *device, - struct vmpacket_descriptor *packet) -{ - struct netvsc_device *net_device; - struct vmtransfer_page_packet_header *vmxferpage_packet; - struct nvsp_message *nvsp_packet; - struct hv_netvsc_packet *netvsc_packet = NULL; - unsigned long start; - unsigned long end, end_virtual; - /* struct netvsc_driver *netvscDriver; */ - struct xferpage_packet *xferpage_packet = NULL; - int i, j; - int count = 0, bytes_remain = 0; - unsigned long flags; - LIST_HEAD(listHead); - - net_device = get_inbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - return; - } - - /* - * All inbound packets other than send completion should be xfer page - * packet - */ - if (packet->Type != VmbusPacketTypeDataUsingTransferPages) { - DPRINT_ERR(NETVSC, "Unknown packet type received - %d", - packet->Type); - put_net_device(device); - return; - } - - nvsp_packet = (struct nvsp_message *)((unsigned long)packet + - (packet->DataOffset8 << 3)); - - /* Make sure this is a valid nvsp packet */ - if (nvsp_packet->hdr.msg_type != - NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { - DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", - nvsp_packet->hdr.msg_type); - put_net_device(device); - return; - } - - DPRINT_DBG(NETVSC, "NVSP packet received - type %d", - nvsp_packet->hdr.msg_type); - - vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; - - if (vmxferpage_packet->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) { - DPRINT_ERR(NETVSC, "Invalid xfer page set id - " - "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, - vmxferpage_packet->TransferPageSetId); - put_net_device(device); - return; - } - - DPRINT_DBG(NETVSC, "xfer page - range count %d", - vmxferpage_packet->RangeCount); - - /* - * Grab free packets (range count + 1) to represent this xfer - * page packet. +1 to represent the xfer page packet itself. - * We grab it here so that we know exactly how many we can - * fulfil - */ - spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); - while (!list_empty(&net_device->recv_pkt_list)) { - list_move_tail(net_device->recv_pkt_list.next, &listHead); - if (++count == vmxferpage_packet->RangeCount + 1) - break; - } - spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); - - /* - * We need at least 2 netvsc pkts (1 to represent the xfer - * page and at least 1 for the range) i.e. we can handled - * some of the xfer page packet ranges... - */ - if (count < 2) { - DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. " - "Dropping this xfer page packet completely!", - count, vmxferpage_packet->RangeCount + 1); - - /* Return it to the freelist */ - spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); - for (i = count; i != 0; i--) { - list_move_tail(listHead.next, - &net_device->recv_pkt_list); - } - spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, - flags); - - netvsc_send_recv_completion(device, - vmxferpage_packet->d.TransactionId); - - put_net_device(device); - return; - } - - /* Remove the 1st packet to represent the xfer page packet itself */ - xferpage_packet = (struct xferpage_packet *)listHead.next; - list_del(&xferpage_packet->list_ent); - - /* This is how much we can satisfy */ - xferpage_packet->count = count - 1; - /* ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= */ - /* vmxferpagePacket->RangeCount); */ - - if (xferpage_packet->count != vmxferpage_packet->RangeCount) { - DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer " - "page...got %d", vmxferpage_packet->RangeCount, - xferpage_packet->count); - } - - /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ - for (i = 0; i < (count - 1); i++) { - netvsc_packet = (struct hv_netvsc_packet *)listHead.next; - list_del(&netvsc_packet->list_ent); - - /* Initialize the netvsc packet */ - netvsc_packet->xfer_page_pkt = xferpage_packet; - netvsc_packet->completion.recv.recv_completion = - netvsc_receive_completion; - netvsc_packet->completion.recv.recv_completion_ctx = - netvsc_packet; - netvsc_packet->device = device; - /* Save this so that we can send it back */ - netvsc_packet->completion.recv.recv_completion_tid = - vmxferpage_packet->d.TransactionId; - - netvsc_packet->total_data_buflen = - vmxferpage_packet->Ranges[i].ByteCount; - netvsc_packet->page_buf_cnt = 1; - - /* ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + */ - /* vmxferpagePacket->Ranges[i].ByteCount < */ - /* netDevice->ReceiveBufferSize); */ - - netvsc_packet->page_buf[0].Length = - vmxferpage_packet->Ranges[i].ByteCount; - - start = virt_to_phys((void *)((unsigned long)net_device-> - recv_buf + vmxferpage_packet->Ranges[i].ByteOffset)); - - netvsc_packet->page_buf[0].Pfn = start >> PAGE_SHIFT; - end_virtual = (unsigned long)net_device->recv_buf - + vmxferpage_packet->Ranges[i].ByteOffset - + vmxferpage_packet->Ranges[i].ByteCount - 1; - end = virt_to_phys((void *)end_virtual); - - /* Calculate the page relative offset */ - netvsc_packet->page_buf[0].Offset = - vmxferpage_packet->Ranges[i].ByteOffset & - (PAGE_SIZE - 1); - if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { - /* Handle frame across multiple pages: */ - netvsc_packet->page_buf[0].Length = - (netvsc_packet->page_buf[0].Pfn << - PAGE_SHIFT) - + PAGE_SIZE - start; - bytes_remain = netvsc_packet->total_data_buflen - - netvsc_packet->page_buf[0].Length; - for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { - netvsc_packet->page_buf[j].Offset = 0; - if (bytes_remain <= PAGE_SIZE) { - netvsc_packet->page_buf[j].Length = - bytes_remain; - bytes_remain = 0; - } else { - netvsc_packet->page_buf[j].Length = - PAGE_SIZE; - bytes_remain -= PAGE_SIZE; - } - netvsc_packet->page_buf[j].Pfn = - virt_to_phys((void *)(end_virtual - - bytes_remain)) >> PAGE_SHIFT; - netvsc_packet->page_buf_cnt++; - if (bytes_remain == 0) - break; - } - /* ASSERT(bytesRemain == 0); */ - } - DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => " - "(pfn %llx, offset %u, len %u)", i, - vmxferpage_packet->Ranges[i].ByteOffset, - vmxferpage_packet->Ranges[i].ByteCount, - netvsc_packet->page_buf[0].Pfn, - netvsc_packet->page_buf[0].Offset, - netvsc_packet->page_buf[0].Length); - - /* Pass it to the upper layer */ - ((struct netvsc_driver *)device->Driver)-> - recv_cb(device, netvsc_packet); - - netvsc_receive_completion(netvsc_packet-> - completion.recv.recv_completion_ctx); - } - - /* ASSERT(list_empty(&listHead)); */ - - put_net_device(device); -} - -static void netvsc_send_recv_completion(struct hv_device *device, - u64 transaction_id) -{ - struct nvsp_message recvcompMessage; - int retries = 0; - int ret; - - DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", - transaction_id); - - recvcompMessage.hdr.msg_type = - NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; - - /* FIXME: Pass in the status */ - recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = - NVSP_STAT_SUCCESS; - -retry_send_cmplt: - /* Send the completion */ - ret = vmbus_sendpacket(device->channel, &recvcompMessage, - sizeof(struct nvsp_message), transaction_id, - VmbusPacketTypeCompletion, 0); - if (ret == 0) { - /* success */ - /* no-op */ - } else if (ret == -1) { - /* no more room...wait a bit and attempt to retry 3 times */ - retries++; - DPRINT_ERR(NETVSC, "unable to send receive completion pkt " - "(tid %llx)...retrying %d", transaction_id, retries); - - if (retries < 4) { - udelay(100); - goto retry_send_cmplt; - } else { - DPRINT_ERR(NETVSC, "unable to send receive completion " - "pkt (tid %llx)...give up retrying", - transaction_id); - } - } else { - DPRINT_ERR(NETVSC, "unable to send receive completion pkt - " - "%llx", transaction_id); - } -} - -/* Send a receive completion packet to RNDIS device (ie NetVsp) */ -static void netvsc_receive_completion(void *context) -{ - struct hv_netvsc_packet *packet = context; - struct hv_device *device = (struct hv_device *)packet->device; - struct netvsc_device *net_device; - u64 transaction_id = 0; - bool fsend_receive_comp = false; - unsigned long flags; - - /* ASSERT(packet->XferPagePacket); */ - - /* - * Even though it seems logical to do a GetOutboundNetDevice() here to - * send out receive completion, we are using GetInboundNetDevice() - * since we may have disable outbound traffic already. - */ - net_device = get_inbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "unable to get net device..." - "device being destroyed?"); - return; - } - - /* Overloading use of the lock. */ - spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); - - /* ASSERT(packet->XferPagePacket->Count > 0); */ - packet->xfer_page_pkt->count--; - - /* - * Last one in the line that represent 1 xfer page packet. - * Return the xfer page packet itself to the freelist - */ - if (packet->xfer_page_pkt->count == 0) { - fsend_receive_comp = true; - transaction_id = packet->completion.recv.recv_completion_tid; - list_add_tail(&packet->xfer_page_pkt->list_ent, - &net_device->recv_pkt_list); - - } - - /* Put the packet back */ - list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); - spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); - - /* Send a receive completion for the xfer page packet */ - if (fsend_receive_comp) - netvsc_send_recv_completion(device, transaction_id); - - put_net_device(device); -} - -static void netvsc_channel_cb(void *context) -{ - int ret; - struct hv_device *device = context; - struct netvsc_device *net_device; - u32 bytes_recvd; - u64 request_id; - unsigned char *packet; - struct vmpacket_descriptor *desc; - unsigned char *buffer; - int bufferlen = NETVSC_PACKET_SIZE; - - /* ASSERT(device); */ - - packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), - GFP_ATOMIC); - if (!packet) - return; - buffer = packet; - - net_device = get_inbound_net_device(device); - if (!net_device) { - DPRINT_ERR(NETVSC, "net device (%p) shutting down..." - "ignoring inbound packets", net_device); - goto out; - } - - do { - ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen, - &bytes_recvd, &request_id); - if (ret == 0) { - if (bytes_recvd > 0) { - DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", - bytes_recvd, request_id); - - desc = (struct vmpacket_descriptor *)buffer; - switch (desc->Type) { - case VmbusPacketTypeCompletion: - netvsc_send_completion(device, desc); - break; - - case VmbusPacketTypeDataUsingTransferPages: - netvsc_receive(device, desc); - break; - - default: - DPRINT_ERR(NETVSC, - "unhandled packet type %d, " - "tid %llx len %d\n", - desc->Type, request_id, - bytes_recvd); - break; - } - - /* reset */ - if (bufferlen > NETVSC_PACKET_SIZE) { - kfree(buffer); - buffer = packet; - bufferlen = NETVSC_PACKET_SIZE; - } - } else { - /* reset */ - if (bufferlen > NETVSC_PACKET_SIZE) { - kfree(buffer); - buffer = packet; - bufferlen = NETVSC_PACKET_SIZE; - } - - break; - } - } else if (ret == -2) { - /* Handle large packet */ - buffer = kmalloc(bytes_recvd, GFP_ATOMIC); - if (buffer == NULL) { - /* Try again next time around */ - DPRINT_ERR(NETVSC, - "unable to allocate buffer of size " - "(%d)!!", bytes_recvd); - break; - } - - bufferlen = bytes_recvd; - } - } while (1); - - put_net_device(device); -out: - kfree(buffer); - return; -} |