195fa0405SHaiyang Zhang /* 295fa0405SHaiyang Zhang * Copyright (c) 2009, Microsoft Corporation. 395fa0405SHaiyang Zhang * 495fa0405SHaiyang Zhang * This program is free software; you can redistribute it and/or modify it 595fa0405SHaiyang Zhang * under the terms and conditions of the GNU General Public License, 695fa0405SHaiyang Zhang * version 2, as published by the Free Software Foundation. 795fa0405SHaiyang Zhang * 895fa0405SHaiyang Zhang * This program is distributed in the hope it will be useful, but WITHOUT 995fa0405SHaiyang Zhang * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1095fa0405SHaiyang Zhang * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1195fa0405SHaiyang Zhang * more details. 1295fa0405SHaiyang Zhang * 1395fa0405SHaiyang Zhang * You should have received a copy of the GNU General Public License along with 14adf8d3ffSJeff Kirsher * this program; if not, see <http://www.gnu.org/licenses/>. 1595fa0405SHaiyang Zhang * 1695fa0405SHaiyang Zhang * Authors: 1795fa0405SHaiyang Zhang * Haiyang Zhang <haiyangz@microsoft.com> 1895fa0405SHaiyang Zhang * Hank Janssen <hjanssen@microsoft.com> 1995fa0405SHaiyang Zhang */ 2095fa0405SHaiyang Zhang #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 2195fa0405SHaiyang Zhang 2295fa0405SHaiyang Zhang #include <linux/kernel.h> 2395fa0405SHaiyang Zhang #include <linux/sched.h> 2495fa0405SHaiyang Zhang #include <linux/wait.h> 2595fa0405SHaiyang Zhang #include <linux/mm.h> 2695fa0405SHaiyang Zhang #include <linux/delay.h> 2795fa0405SHaiyang Zhang #include <linux/io.h> 2895fa0405SHaiyang Zhang #include <linux/slab.h> 2995fa0405SHaiyang Zhang #include <linux/netdevice.h> 30f157e78dSHaiyang Zhang #include <linux/if_ether.h> 3195fa0405SHaiyang Zhang 3295fa0405SHaiyang Zhang #include "hyperv_net.h" 3395fa0405SHaiyang Zhang 3495fa0405SHaiyang Zhang 3595fa0405SHaiyang Zhang static struct netvsc_device *alloc_net_device(struct hv_device *device) 3695fa0405SHaiyang Zhang { 3795fa0405SHaiyang Zhang struct netvsc_device *net_device; 3895fa0405SHaiyang Zhang struct net_device *ndev = hv_get_drvdata(device); 3995fa0405SHaiyang Zhang 4095fa0405SHaiyang Zhang net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); 4195fa0405SHaiyang Zhang if (!net_device) 4295fa0405SHaiyang Zhang return NULL; 4395fa0405SHaiyang Zhang 44dc5cd894SHaiyang Zhang init_waitqueue_head(&net_device->wait_drain); 454d447c9aSHaiyang Zhang net_device->start_remove = false; 4695fa0405SHaiyang Zhang net_device->destroy = false; 4795fa0405SHaiyang Zhang net_device->dev = device; 4895fa0405SHaiyang Zhang net_device->ndev = ndev; 4995fa0405SHaiyang Zhang 5095fa0405SHaiyang Zhang hv_set_drvdata(device, net_device); 5195fa0405SHaiyang Zhang return net_device; 5295fa0405SHaiyang Zhang } 5395fa0405SHaiyang Zhang 5495fa0405SHaiyang Zhang static struct netvsc_device *get_outbound_net_device(struct hv_device *device) 5595fa0405SHaiyang Zhang { 5695fa0405SHaiyang Zhang struct netvsc_device *net_device; 5795fa0405SHaiyang Zhang 5895fa0405SHaiyang Zhang net_device = hv_get_drvdata(device); 5995fa0405SHaiyang Zhang if (net_device && net_device->destroy) 6095fa0405SHaiyang Zhang net_device = NULL; 6195fa0405SHaiyang Zhang 6295fa0405SHaiyang Zhang return net_device; 6395fa0405SHaiyang Zhang } 6495fa0405SHaiyang Zhang 6595fa0405SHaiyang Zhang static struct netvsc_device *get_inbound_net_device(struct hv_device *device) 6695fa0405SHaiyang Zhang { 6795fa0405SHaiyang Zhang struct netvsc_device *net_device; 6895fa0405SHaiyang Zhang 6995fa0405SHaiyang Zhang net_device = hv_get_drvdata(device); 7095fa0405SHaiyang Zhang 7195fa0405SHaiyang Zhang if (!net_device) 7295fa0405SHaiyang Zhang goto get_in_err; 7395fa0405SHaiyang Zhang 7495fa0405SHaiyang Zhang if (net_device->destroy && 7595fa0405SHaiyang Zhang atomic_read(&net_device->num_outstanding_sends) == 0) 7695fa0405SHaiyang Zhang net_device = NULL; 7795fa0405SHaiyang Zhang 7895fa0405SHaiyang Zhang get_in_err: 7995fa0405SHaiyang Zhang return net_device; 8095fa0405SHaiyang Zhang } 8195fa0405SHaiyang Zhang 8295fa0405SHaiyang Zhang 8395fa0405SHaiyang Zhang static int netvsc_destroy_recv_buf(struct netvsc_device *net_device) 8495fa0405SHaiyang Zhang { 8595fa0405SHaiyang Zhang struct nvsp_message *revoke_packet; 8695fa0405SHaiyang Zhang int ret = 0; 8795fa0405SHaiyang Zhang struct net_device *ndev = net_device->ndev; 8895fa0405SHaiyang Zhang 8995fa0405SHaiyang Zhang /* 9095fa0405SHaiyang Zhang * If we got a section count, it means we received a 9195fa0405SHaiyang Zhang * SendReceiveBufferComplete msg (ie sent 9295fa0405SHaiyang Zhang * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need 9395fa0405SHaiyang Zhang * to send a revoke msg here 9495fa0405SHaiyang Zhang */ 9595fa0405SHaiyang Zhang if (net_device->recv_section_cnt) { 9695fa0405SHaiyang Zhang /* Send the revoke receive buffer */ 9795fa0405SHaiyang Zhang revoke_packet = &net_device->revoke_packet; 9895fa0405SHaiyang Zhang memset(revoke_packet, 0, sizeof(struct nvsp_message)); 9995fa0405SHaiyang Zhang 10095fa0405SHaiyang Zhang revoke_packet->hdr.msg_type = 10195fa0405SHaiyang Zhang NVSP_MSG1_TYPE_REVOKE_RECV_BUF; 10295fa0405SHaiyang Zhang revoke_packet->msg.v1_msg. 10395fa0405SHaiyang Zhang revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; 10495fa0405SHaiyang Zhang 10595fa0405SHaiyang Zhang ret = vmbus_sendpacket(net_device->dev->channel, 10695fa0405SHaiyang Zhang revoke_packet, 10795fa0405SHaiyang Zhang sizeof(struct nvsp_message), 10895fa0405SHaiyang Zhang (unsigned long)revoke_packet, 10995fa0405SHaiyang Zhang VM_PKT_DATA_INBAND, 0); 11095fa0405SHaiyang Zhang /* 11195fa0405SHaiyang Zhang * If we failed here, we might as well return and 11295fa0405SHaiyang Zhang * have a leak rather than continue and a bugchk 11395fa0405SHaiyang Zhang */ 11495fa0405SHaiyang Zhang if (ret != 0) { 11595fa0405SHaiyang Zhang netdev_err(ndev, "unable to send " 11695fa0405SHaiyang Zhang "revoke receive buffer to netvsp\n"); 11795fa0405SHaiyang Zhang return ret; 11895fa0405SHaiyang Zhang } 11995fa0405SHaiyang Zhang } 12095fa0405SHaiyang Zhang 12195fa0405SHaiyang Zhang /* Teardown the gpadl on the vsp end */ 12295fa0405SHaiyang Zhang if (net_device->recv_buf_gpadl_handle) { 12395fa0405SHaiyang Zhang ret = vmbus_teardown_gpadl(net_device->dev->channel, 12495fa0405SHaiyang Zhang net_device->recv_buf_gpadl_handle); 12595fa0405SHaiyang Zhang 12695fa0405SHaiyang Zhang /* If we failed here, we might as well return and have a leak 12795fa0405SHaiyang Zhang * rather than continue and a bugchk 12895fa0405SHaiyang Zhang */ 12995fa0405SHaiyang Zhang if (ret != 0) { 13095fa0405SHaiyang Zhang netdev_err(ndev, 13195fa0405SHaiyang Zhang "unable to teardown receive buffer's gpadl\n"); 13295fa0405SHaiyang Zhang return ret; 13395fa0405SHaiyang Zhang } 13495fa0405SHaiyang Zhang net_device->recv_buf_gpadl_handle = 0; 13595fa0405SHaiyang Zhang } 13695fa0405SHaiyang Zhang 13795fa0405SHaiyang Zhang if (net_device->recv_buf) { 13895fa0405SHaiyang Zhang /* Free up the receive buffer */ 139b679ef73SHaiyang Zhang vfree(net_device->recv_buf); 14095fa0405SHaiyang Zhang net_device->recv_buf = NULL; 14195fa0405SHaiyang Zhang } 14295fa0405SHaiyang Zhang 14395fa0405SHaiyang Zhang if (net_device->recv_section) { 14495fa0405SHaiyang Zhang net_device->recv_section_cnt = 0; 14595fa0405SHaiyang Zhang kfree(net_device->recv_section); 14695fa0405SHaiyang Zhang net_device->recv_section = NULL; 14795fa0405SHaiyang Zhang } 14895fa0405SHaiyang Zhang 14995fa0405SHaiyang Zhang return ret; 15095fa0405SHaiyang Zhang } 15195fa0405SHaiyang Zhang 15295fa0405SHaiyang Zhang static int netvsc_init_recv_buf(struct hv_device *device) 15395fa0405SHaiyang Zhang { 15495fa0405SHaiyang Zhang int ret = 0; 15595fa0405SHaiyang Zhang int t; 15695fa0405SHaiyang Zhang struct netvsc_device *net_device; 15795fa0405SHaiyang Zhang struct nvsp_message *init_packet; 15895fa0405SHaiyang Zhang struct net_device *ndev; 15995fa0405SHaiyang Zhang 16095fa0405SHaiyang Zhang net_device = get_outbound_net_device(device); 16195fa0405SHaiyang Zhang if (!net_device) 16295fa0405SHaiyang Zhang return -ENODEV; 16395fa0405SHaiyang Zhang ndev = net_device->ndev; 16495fa0405SHaiyang Zhang 165b679ef73SHaiyang Zhang net_device->recv_buf = vzalloc(net_device->recv_buf_size); 16695fa0405SHaiyang Zhang if (!net_device->recv_buf) { 16795fa0405SHaiyang Zhang netdev_err(ndev, "unable to allocate receive " 16895fa0405SHaiyang Zhang "buffer of size %d\n", net_device->recv_buf_size); 16995fa0405SHaiyang Zhang ret = -ENOMEM; 17095fa0405SHaiyang Zhang goto cleanup; 17195fa0405SHaiyang Zhang } 17295fa0405SHaiyang Zhang 17395fa0405SHaiyang Zhang /* 17495fa0405SHaiyang Zhang * Establish the gpadl handle for this buffer on this 17595fa0405SHaiyang Zhang * channel. Note: This call uses the vmbus connection rather 17695fa0405SHaiyang Zhang * than the channel to establish the gpadl handle. 17795fa0405SHaiyang Zhang */ 17895fa0405SHaiyang Zhang ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, 17995fa0405SHaiyang Zhang net_device->recv_buf_size, 18095fa0405SHaiyang Zhang &net_device->recv_buf_gpadl_handle); 18195fa0405SHaiyang Zhang if (ret != 0) { 18295fa0405SHaiyang Zhang netdev_err(ndev, 18395fa0405SHaiyang Zhang "unable to establish receive buffer's gpadl\n"); 18495fa0405SHaiyang Zhang goto cleanup; 18595fa0405SHaiyang Zhang } 18695fa0405SHaiyang Zhang 18795fa0405SHaiyang Zhang 18895fa0405SHaiyang Zhang /* Notify the NetVsp of the gpadl handle */ 18995fa0405SHaiyang Zhang init_packet = &net_device->channel_init_pkt; 19095fa0405SHaiyang Zhang 19195fa0405SHaiyang Zhang memset(init_packet, 0, sizeof(struct nvsp_message)); 19295fa0405SHaiyang Zhang 19395fa0405SHaiyang Zhang init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; 19495fa0405SHaiyang Zhang init_packet->msg.v1_msg.send_recv_buf. 19595fa0405SHaiyang Zhang gpadl_handle = net_device->recv_buf_gpadl_handle; 19695fa0405SHaiyang Zhang init_packet->msg.v1_msg. 19795fa0405SHaiyang Zhang send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; 19895fa0405SHaiyang Zhang 19995fa0405SHaiyang Zhang /* Send the gpadl notification request */ 20095fa0405SHaiyang Zhang ret = vmbus_sendpacket(device->channel, init_packet, 20195fa0405SHaiyang Zhang sizeof(struct nvsp_message), 20295fa0405SHaiyang Zhang (unsigned long)init_packet, 20395fa0405SHaiyang Zhang VM_PKT_DATA_INBAND, 20495fa0405SHaiyang Zhang VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); 20595fa0405SHaiyang Zhang if (ret != 0) { 20695fa0405SHaiyang Zhang netdev_err(ndev, 20795fa0405SHaiyang Zhang "unable to send receive buffer's gpadl to netvsp\n"); 20895fa0405SHaiyang Zhang goto cleanup; 20995fa0405SHaiyang Zhang } 21095fa0405SHaiyang Zhang 21195fa0405SHaiyang Zhang t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); 21295fa0405SHaiyang Zhang BUG_ON(t == 0); 21395fa0405SHaiyang Zhang 21495fa0405SHaiyang Zhang 21595fa0405SHaiyang Zhang /* Check the response */ 21695fa0405SHaiyang Zhang if (init_packet->msg.v1_msg. 21795fa0405SHaiyang Zhang send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { 21895fa0405SHaiyang Zhang netdev_err(ndev, "Unable to complete receive buffer " 21995fa0405SHaiyang Zhang "initialization with NetVsp - status %d\n", 22095fa0405SHaiyang Zhang init_packet->msg.v1_msg. 22195fa0405SHaiyang Zhang send_recv_buf_complete.status); 22295fa0405SHaiyang Zhang ret = -EINVAL; 22395fa0405SHaiyang Zhang goto cleanup; 22495fa0405SHaiyang Zhang } 22595fa0405SHaiyang Zhang 22695fa0405SHaiyang Zhang /* Parse the response */ 22795fa0405SHaiyang Zhang 22895fa0405SHaiyang Zhang net_device->recv_section_cnt = init_packet->msg. 22995fa0405SHaiyang Zhang v1_msg.send_recv_buf_complete.num_sections; 23095fa0405SHaiyang Zhang 231c1813200SHaiyang Zhang net_device->recv_section = kmemdup( 232c1813200SHaiyang Zhang init_packet->msg.v1_msg.send_recv_buf_complete.sections, 233c1813200SHaiyang Zhang net_device->recv_section_cnt * 234c1813200SHaiyang Zhang sizeof(struct nvsp_1_receive_buffer_section), 23595fa0405SHaiyang Zhang GFP_KERNEL); 23695fa0405SHaiyang Zhang if (net_device->recv_section == NULL) { 23795fa0405SHaiyang Zhang ret = -EINVAL; 23895fa0405SHaiyang Zhang goto cleanup; 23995fa0405SHaiyang Zhang } 24095fa0405SHaiyang Zhang 24195fa0405SHaiyang Zhang /* 24295fa0405SHaiyang Zhang * For 1st release, there should only be 1 section that represents the 24395fa0405SHaiyang Zhang * entire receive buffer 24495fa0405SHaiyang Zhang */ 24595fa0405SHaiyang Zhang if (net_device->recv_section_cnt != 1 || 24695fa0405SHaiyang Zhang net_device->recv_section->offset != 0) { 24795fa0405SHaiyang Zhang ret = -EINVAL; 24895fa0405SHaiyang Zhang goto cleanup; 24995fa0405SHaiyang Zhang } 25095fa0405SHaiyang Zhang 25195fa0405SHaiyang Zhang goto exit; 25295fa0405SHaiyang Zhang 25395fa0405SHaiyang Zhang cleanup: 25495fa0405SHaiyang Zhang netvsc_destroy_recv_buf(net_device); 25595fa0405SHaiyang Zhang 25695fa0405SHaiyang Zhang exit: 25795fa0405SHaiyang Zhang return ret; 25895fa0405SHaiyang Zhang } 25995fa0405SHaiyang Zhang 26095fa0405SHaiyang Zhang 261f157e78dSHaiyang Zhang /* Negotiate NVSP protocol version */ 262f157e78dSHaiyang Zhang static int negotiate_nvsp_ver(struct hv_device *device, 263f157e78dSHaiyang Zhang struct netvsc_device *net_device, 264f157e78dSHaiyang Zhang struct nvsp_message *init_packet, 265f157e78dSHaiyang Zhang u32 nvsp_ver) 26695fa0405SHaiyang Zhang { 26795fa0405SHaiyang Zhang int ret, t; 268f157e78dSHaiyang Zhang 269f157e78dSHaiyang Zhang memset(init_packet, 0, sizeof(struct nvsp_message)); 270f157e78dSHaiyang Zhang init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; 271f157e78dSHaiyang Zhang init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; 272f157e78dSHaiyang Zhang init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; 273f157e78dSHaiyang Zhang 274f157e78dSHaiyang Zhang /* Send the init request */ 275f157e78dSHaiyang Zhang ret = vmbus_sendpacket(device->channel, init_packet, 276f157e78dSHaiyang Zhang sizeof(struct nvsp_message), 277f157e78dSHaiyang Zhang (unsigned long)init_packet, 278f157e78dSHaiyang Zhang VM_PKT_DATA_INBAND, 279f157e78dSHaiyang Zhang VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); 280f157e78dSHaiyang Zhang 281f157e78dSHaiyang Zhang if (ret != 0) 282f157e78dSHaiyang Zhang return ret; 283f157e78dSHaiyang Zhang 284f157e78dSHaiyang Zhang t = wait_for_completion_timeout(&net_device->channel_init_wait, 5*HZ); 285f157e78dSHaiyang Zhang 286f157e78dSHaiyang Zhang if (t == 0) 287f157e78dSHaiyang Zhang return -ETIMEDOUT; 288f157e78dSHaiyang Zhang 289f157e78dSHaiyang Zhang if (init_packet->msg.init_msg.init_complete.status != 290f157e78dSHaiyang Zhang NVSP_STAT_SUCCESS) 291f157e78dSHaiyang Zhang return -EINVAL; 292f157e78dSHaiyang Zhang 293a1eabb01SHaiyang Zhang if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) 294f157e78dSHaiyang Zhang return 0; 295f157e78dSHaiyang Zhang 296f157e78dSHaiyang Zhang /* NVSPv2 only: Send NDIS config */ 297f157e78dSHaiyang Zhang memset(init_packet, 0, sizeof(struct nvsp_message)); 298f157e78dSHaiyang Zhang init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; 2994d447c9aSHaiyang Zhang init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu; 3001f5f3a75SHaiyang Zhang init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; 301f157e78dSHaiyang Zhang 302f157e78dSHaiyang Zhang ret = vmbus_sendpacket(device->channel, init_packet, 303f157e78dSHaiyang Zhang sizeof(struct nvsp_message), 304f157e78dSHaiyang Zhang (unsigned long)init_packet, 305f157e78dSHaiyang Zhang VM_PKT_DATA_INBAND, 0); 306f157e78dSHaiyang Zhang 307f157e78dSHaiyang Zhang return ret; 308f157e78dSHaiyang Zhang } 309f157e78dSHaiyang Zhang 310f157e78dSHaiyang Zhang static int netvsc_connect_vsp(struct hv_device *device) 311f157e78dSHaiyang Zhang { 312f157e78dSHaiyang Zhang int ret; 31395fa0405SHaiyang Zhang struct netvsc_device *net_device; 31495fa0405SHaiyang Zhang struct nvsp_message *init_packet; 31595fa0405SHaiyang Zhang int ndis_version; 31695fa0405SHaiyang Zhang struct net_device *ndev; 317a1eabb01SHaiyang Zhang u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, 318a1eabb01SHaiyang Zhang NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; 319a1eabb01SHaiyang Zhang int i, num_ver = 4; /* number of different NVSP versions */ 32095fa0405SHaiyang Zhang 32195fa0405SHaiyang Zhang net_device = get_outbound_net_device(device); 32295fa0405SHaiyang Zhang if (!net_device) 32395fa0405SHaiyang Zhang return -ENODEV; 32495fa0405SHaiyang Zhang ndev = net_device->ndev; 32595fa0405SHaiyang Zhang 32695fa0405SHaiyang Zhang init_packet = &net_device->channel_init_pkt; 32795fa0405SHaiyang Zhang 328f157e78dSHaiyang Zhang /* Negotiate the latest NVSP protocol supported */ 329a1eabb01SHaiyang Zhang for (i = num_ver - 1; i >= 0; i--) 330f157e78dSHaiyang Zhang if (negotiate_nvsp_ver(device, net_device, init_packet, 331a1eabb01SHaiyang Zhang ver_list[i]) == 0) { 332a1eabb01SHaiyang Zhang net_device->nvsp_version = ver_list[i]; 333a1eabb01SHaiyang Zhang break; 334a1eabb01SHaiyang Zhang } 335a1eabb01SHaiyang Zhang 336a1eabb01SHaiyang Zhang if (i < 0) { 33795fa0405SHaiyang Zhang ret = -EPROTO; 33895fa0405SHaiyang Zhang goto cleanup; 33995fa0405SHaiyang Zhang } 340f157e78dSHaiyang Zhang 341f157e78dSHaiyang Zhang pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); 342f157e78dSHaiyang Zhang 34395fa0405SHaiyang Zhang /* Send the ndis version */ 34495fa0405SHaiyang Zhang memset(init_packet, 0, sizeof(struct nvsp_message)); 34595fa0405SHaiyang Zhang 346a1eabb01SHaiyang Zhang if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) 3471f73db49SKY Srinivasan ndis_version = 0x00060001; 348a1eabb01SHaiyang Zhang else 349a1eabb01SHaiyang Zhang ndis_version = 0x0006001e; 35095fa0405SHaiyang Zhang 35195fa0405SHaiyang Zhang init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; 35295fa0405SHaiyang Zhang init_packet->msg.v1_msg. 35395fa0405SHaiyang Zhang send_ndis_ver.ndis_major_ver = 35495fa0405SHaiyang Zhang (ndis_version & 0xFFFF0000) >> 16; 35595fa0405SHaiyang Zhang init_packet->msg.v1_msg. 35695fa0405SHaiyang Zhang send_ndis_ver.ndis_minor_ver = 35795fa0405SHaiyang Zhang ndis_version & 0xFFFF; 35895fa0405SHaiyang Zhang 35995fa0405SHaiyang Zhang /* Send the init request */ 36095fa0405SHaiyang Zhang ret = vmbus_sendpacket(device->channel, init_packet, 36195fa0405SHaiyang Zhang sizeof(struct nvsp_message), 36295fa0405SHaiyang Zhang (unsigned long)init_packet, 36395fa0405SHaiyang Zhang VM_PKT_DATA_INBAND, 0); 36495fa0405SHaiyang Zhang if (ret != 0) 36595fa0405SHaiyang Zhang goto cleanup; 36695fa0405SHaiyang Zhang 36795fa0405SHaiyang Zhang /* Post the big receive buffer to NetVSP */ 36899d3016dSHaiyang Zhang if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) 36999d3016dSHaiyang Zhang net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; 37099d3016dSHaiyang Zhang else 37199d3016dSHaiyang Zhang net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; 37299d3016dSHaiyang Zhang 37395fa0405SHaiyang Zhang ret = netvsc_init_recv_buf(device); 37495fa0405SHaiyang Zhang 37595fa0405SHaiyang Zhang cleanup: 37695fa0405SHaiyang Zhang return ret; 37795fa0405SHaiyang Zhang } 37895fa0405SHaiyang Zhang 37995fa0405SHaiyang Zhang static void netvsc_disconnect_vsp(struct netvsc_device *net_device) 38095fa0405SHaiyang Zhang { 38195fa0405SHaiyang Zhang netvsc_destroy_recv_buf(net_device); 38295fa0405SHaiyang Zhang } 38395fa0405SHaiyang Zhang 38495fa0405SHaiyang Zhang /* 38595fa0405SHaiyang Zhang * netvsc_device_remove - Callback when the root bus device is removed 38695fa0405SHaiyang Zhang */ 38795fa0405SHaiyang Zhang int netvsc_device_remove(struct hv_device *device) 38895fa0405SHaiyang Zhang { 38995fa0405SHaiyang Zhang struct netvsc_device *net_device; 39095fa0405SHaiyang Zhang struct hv_netvsc_packet *netvsc_packet, *pos; 39195fa0405SHaiyang Zhang unsigned long flags; 39295fa0405SHaiyang Zhang 39395fa0405SHaiyang Zhang net_device = hv_get_drvdata(device); 39495fa0405SHaiyang Zhang 39595fa0405SHaiyang Zhang netvsc_disconnect_vsp(net_device); 39695fa0405SHaiyang Zhang 39795fa0405SHaiyang Zhang /* 39895fa0405SHaiyang Zhang * Since we have already drained, we don't need to busy wait 39995fa0405SHaiyang Zhang * as was done in final_release_stor_device() 40095fa0405SHaiyang Zhang * Note that we cannot set the ext pointer to NULL until 40195fa0405SHaiyang Zhang * we have drained - to drain the outgoing packets, we need to 40295fa0405SHaiyang Zhang * allow incoming packets. 40395fa0405SHaiyang Zhang */ 40495fa0405SHaiyang Zhang 40595fa0405SHaiyang Zhang spin_lock_irqsave(&device->channel->inbound_lock, flags); 40695fa0405SHaiyang Zhang hv_set_drvdata(device, NULL); 40795fa0405SHaiyang Zhang spin_unlock_irqrestore(&device->channel->inbound_lock, flags); 40895fa0405SHaiyang Zhang 40995fa0405SHaiyang Zhang /* 41095fa0405SHaiyang Zhang * At this point, no one should be accessing net_device 41195fa0405SHaiyang Zhang * except in here 41295fa0405SHaiyang Zhang */ 41395fa0405SHaiyang Zhang dev_notice(&device->device, "net device safe to remove\n"); 41495fa0405SHaiyang Zhang 41595fa0405SHaiyang Zhang /* Now, we can close the channel safely */ 41695fa0405SHaiyang Zhang vmbus_close(device->channel); 41795fa0405SHaiyang Zhang 41895fa0405SHaiyang Zhang /* Release all resources */ 41995fa0405SHaiyang Zhang list_for_each_entry_safe(netvsc_packet, pos, 42095fa0405SHaiyang Zhang &net_device->recv_pkt_list, list_ent) { 42195fa0405SHaiyang Zhang list_del(&netvsc_packet->list_ent); 42295fa0405SHaiyang Zhang kfree(netvsc_packet); 42395fa0405SHaiyang Zhang } 42495fa0405SHaiyang Zhang 4255b54dac8SHaiyang Zhang if (net_device->sub_cb_buf) 4265b54dac8SHaiyang Zhang vfree(net_device->sub_cb_buf); 4275b54dac8SHaiyang Zhang 42895fa0405SHaiyang Zhang kfree(net_device); 42995fa0405SHaiyang Zhang return 0; 43095fa0405SHaiyang Zhang } 43195fa0405SHaiyang Zhang 43233be96e4SHaiyang Zhang 43333be96e4SHaiyang Zhang #define RING_AVAIL_PERCENT_HIWATER 20 43433be96e4SHaiyang Zhang #define RING_AVAIL_PERCENT_LOWATER 10 43533be96e4SHaiyang Zhang 43633be96e4SHaiyang Zhang /* 43733be96e4SHaiyang Zhang * Get the percentage of available bytes to write in the ring. 43833be96e4SHaiyang Zhang * The return value is in range from 0 to 100. 43933be96e4SHaiyang Zhang */ 44033be96e4SHaiyang Zhang static inline u32 hv_ringbuf_avail_percent( 44133be96e4SHaiyang Zhang struct hv_ring_buffer_info *ring_info) 44233be96e4SHaiyang Zhang { 44333be96e4SHaiyang Zhang u32 avail_read, avail_write; 44433be96e4SHaiyang Zhang 44533be96e4SHaiyang Zhang hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); 44633be96e4SHaiyang Zhang 44733be96e4SHaiyang Zhang return avail_write * 100 / ring_info->ring_datasize; 44833be96e4SHaiyang Zhang } 44933be96e4SHaiyang Zhang 45097c1723aSKY Srinivasan static void netvsc_send_completion(struct netvsc_device *net_device, 45197c1723aSKY Srinivasan struct hv_device *device, 45295fa0405SHaiyang Zhang struct vmpacket_descriptor *packet) 45395fa0405SHaiyang Zhang { 45495fa0405SHaiyang Zhang struct nvsp_message *nvsp_packet; 45595fa0405SHaiyang Zhang struct hv_netvsc_packet *nvsc_packet; 45695fa0405SHaiyang Zhang struct net_device *ndev; 45795fa0405SHaiyang Zhang 45895fa0405SHaiyang Zhang ndev = net_device->ndev; 45995fa0405SHaiyang Zhang 46095fa0405SHaiyang Zhang nvsp_packet = (struct nvsp_message *)((unsigned long)packet + 46195fa0405SHaiyang Zhang (packet->offset8 << 3)); 46295fa0405SHaiyang Zhang 46395fa0405SHaiyang Zhang if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || 46495fa0405SHaiyang Zhang (nvsp_packet->hdr.msg_type == 46595fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || 46695fa0405SHaiyang Zhang (nvsp_packet->hdr.msg_type == 4675b54dac8SHaiyang Zhang NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || 4685b54dac8SHaiyang Zhang (nvsp_packet->hdr.msg_type == 4695b54dac8SHaiyang Zhang NVSP_MSG5_TYPE_SUBCHANNEL)) { 47095fa0405SHaiyang Zhang /* Copy the response back */ 47195fa0405SHaiyang Zhang memcpy(&net_device->channel_init_pkt, nvsp_packet, 47295fa0405SHaiyang Zhang sizeof(struct nvsp_message)); 47395fa0405SHaiyang Zhang complete(&net_device->channel_init_wait); 47495fa0405SHaiyang Zhang } else if (nvsp_packet->hdr.msg_type == 47595fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { 47633be96e4SHaiyang Zhang int num_outstanding_sends; 4775b54dac8SHaiyang Zhang u16 q_idx = 0; 4785b54dac8SHaiyang Zhang struct vmbus_channel *channel = device->channel; 4795b54dac8SHaiyang Zhang int queue_sends; 48033be96e4SHaiyang Zhang 48195fa0405SHaiyang Zhang /* Get the send context */ 48295fa0405SHaiyang Zhang nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) 48395fa0405SHaiyang Zhang packet->trans_id; 48495fa0405SHaiyang Zhang 48595fa0405SHaiyang Zhang /* Notify the layer above us */ 4865b54dac8SHaiyang Zhang if (nvsc_packet) { 4875b54dac8SHaiyang Zhang q_idx = nvsc_packet->q_idx; 4885b54dac8SHaiyang Zhang channel = nvsc_packet->channel; 48995fa0405SHaiyang Zhang nvsc_packet->completion.send.send_completion( 490f1ea3cd7SHaiyang Zhang nvsc_packet->completion.send. 491f1ea3cd7SHaiyang Zhang send_completion_ctx); 4925b54dac8SHaiyang Zhang } 49395fa0405SHaiyang Zhang 49433be96e4SHaiyang Zhang num_outstanding_sends = 49533be96e4SHaiyang Zhang atomic_dec_return(&net_device->num_outstanding_sends); 4965b54dac8SHaiyang Zhang queue_sends = atomic_dec_return(&net_device-> 4975b54dac8SHaiyang Zhang queue_sends[q_idx]); 4981d06825bSHaiyang Zhang 499dc5cd894SHaiyang Zhang if (net_device->destroy && num_outstanding_sends == 0) 500dc5cd894SHaiyang Zhang wake_up(&net_device->wait_drain); 501dc5cd894SHaiyang Zhang 5025b54dac8SHaiyang Zhang if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && 5035b54dac8SHaiyang Zhang !net_device->start_remove && 5045b54dac8SHaiyang Zhang (hv_ringbuf_avail_percent(&channel->outbound) > 5055b54dac8SHaiyang Zhang RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) 5065b54dac8SHaiyang Zhang netif_tx_wake_queue(netdev_get_tx_queue( 5075b54dac8SHaiyang Zhang ndev, q_idx)); 50895fa0405SHaiyang Zhang } else { 50995fa0405SHaiyang Zhang netdev_err(ndev, "Unknown send completion packet type- " 51095fa0405SHaiyang Zhang "%d received!!\n", nvsp_packet->hdr.msg_type); 51195fa0405SHaiyang Zhang } 51295fa0405SHaiyang Zhang 51395fa0405SHaiyang Zhang } 51495fa0405SHaiyang Zhang 51595fa0405SHaiyang Zhang int netvsc_send(struct hv_device *device, 51695fa0405SHaiyang Zhang struct hv_netvsc_packet *packet) 51795fa0405SHaiyang Zhang { 51895fa0405SHaiyang Zhang struct netvsc_device *net_device; 51995fa0405SHaiyang Zhang int ret = 0; 52095fa0405SHaiyang Zhang struct nvsp_message sendMessage; 52195fa0405SHaiyang Zhang struct net_device *ndev; 5225b54dac8SHaiyang Zhang struct vmbus_channel *out_channel = NULL; 523f1ea3cd7SHaiyang Zhang u64 req_id; 52495fa0405SHaiyang Zhang 52595fa0405SHaiyang Zhang net_device = get_outbound_net_device(device); 52695fa0405SHaiyang Zhang if (!net_device) 52795fa0405SHaiyang Zhang return -ENODEV; 52895fa0405SHaiyang Zhang ndev = net_device->ndev; 52995fa0405SHaiyang Zhang 53095fa0405SHaiyang Zhang sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; 53195fa0405SHaiyang Zhang if (packet->is_data_pkt) { 53295fa0405SHaiyang Zhang /* 0 is RMC_DATA; */ 53395fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; 53495fa0405SHaiyang Zhang } else { 53595fa0405SHaiyang Zhang /* 1 is RMC_CONTROL; */ 53695fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; 53795fa0405SHaiyang Zhang } 53895fa0405SHaiyang Zhang 53995fa0405SHaiyang Zhang /* Not using send buffer section */ 54095fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = 54195fa0405SHaiyang Zhang 0xFFFFFFFF; 54295fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; 54395fa0405SHaiyang Zhang 544f1ea3cd7SHaiyang Zhang if (packet->completion.send.send_completion) 54500ca8f0cSHaiyang Zhang req_id = (ulong)packet; 546f1ea3cd7SHaiyang Zhang else 547f1ea3cd7SHaiyang Zhang req_id = 0; 548f1ea3cd7SHaiyang Zhang 5495b54dac8SHaiyang Zhang out_channel = net_device->chn_table[packet->q_idx]; 5505b54dac8SHaiyang Zhang if (out_channel == NULL) 5515b54dac8SHaiyang Zhang out_channel = device->channel; 5525b54dac8SHaiyang Zhang packet->channel = out_channel; 5535b54dac8SHaiyang Zhang 55495fa0405SHaiyang Zhang if (packet->page_buf_cnt) { 5555b54dac8SHaiyang Zhang ret = vmbus_sendpacket_pagebuffer(out_channel, 55695fa0405SHaiyang Zhang packet->page_buf, 55795fa0405SHaiyang Zhang packet->page_buf_cnt, 55895fa0405SHaiyang Zhang &sendMessage, 55995fa0405SHaiyang Zhang sizeof(struct nvsp_message), 560f1ea3cd7SHaiyang Zhang req_id); 56195fa0405SHaiyang Zhang } else { 5625b54dac8SHaiyang Zhang ret = vmbus_sendpacket(out_channel, &sendMessage, 56395fa0405SHaiyang Zhang sizeof(struct nvsp_message), 564f1ea3cd7SHaiyang Zhang req_id, 56595fa0405SHaiyang Zhang VM_PKT_DATA_INBAND, 56695fa0405SHaiyang Zhang VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); 56795fa0405SHaiyang Zhang } 56895fa0405SHaiyang Zhang 5691d06825bSHaiyang Zhang if (ret == 0) { 5701d06825bSHaiyang Zhang atomic_inc(&net_device->num_outstanding_sends); 5715b54dac8SHaiyang Zhang atomic_inc(&net_device->queue_sends[packet->q_idx]); 5725b54dac8SHaiyang Zhang 5735b54dac8SHaiyang Zhang if (hv_ringbuf_avail_percent(&out_channel->outbound) < 57433be96e4SHaiyang Zhang RING_AVAIL_PERCENT_LOWATER) { 5755b54dac8SHaiyang Zhang netif_tx_stop_queue(netdev_get_tx_queue( 5765b54dac8SHaiyang Zhang ndev, packet->q_idx)); 5775b54dac8SHaiyang Zhang 57833be96e4SHaiyang Zhang if (atomic_read(&net_device-> 5795b54dac8SHaiyang Zhang queue_sends[packet->q_idx]) < 1) 5805b54dac8SHaiyang Zhang netif_tx_wake_queue(netdev_get_tx_queue( 5815b54dac8SHaiyang Zhang ndev, packet->q_idx)); 58233be96e4SHaiyang Zhang } 5831d06825bSHaiyang Zhang } else if (ret == -EAGAIN) { 5845b54dac8SHaiyang Zhang netif_tx_stop_queue(netdev_get_tx_queue( 5855b54dac8SHaiyang Zhang ndev, packet->q_idx)); 5865b54dac8SHaiyang Zhang if (atomic_read(&net_device->queue_sends[packet->q_idx]) < 1) { 5875b54dac8SHaiyang Zhang netif_tx_wake_queue(netdev_get_tx_queue( 5885b54dac8SHaiyang Zhang ndev, packet->q_idx)); 58933be96e4SHaiyang Zhang ret = -ENOSPC; 59033be96e4SHaiyang Zhang } 5911d06825bSHaiyang Zhang } else { 59295fa0405SHaiyang Zhang netdev_err(ndev, "Unable to send packet %p ret %d\n", 59395fa0405SHaiyang Zhang packet, ret); 5941d06825bSHaiyang Zhang } 59595fa0405SHaiyang Zhang 59695fa0405SHaiyang Zhang return ret; 59795fa0405SHaiyang Zhang } 59895fa0405SHaiyang Zhang 59995fa0405SHaiyang Zhang static void netvsc_send_recv_completion(struct hv_device *device, 6005b54dac8SHaiyang Zhang struct vmbus_channel *channel, 60197c1723aSKY Srinivasan struct netvsc_device *net_device, 60263f6921dSHaiyang Zhang u64 transaction_id, u32 status) 60395fa0405SHaiyang Zhang { 60495fa0405SHaiyang Zhang struct nvsp_message recvcompMessage; 60595fa0405SHaiyang Zhang int retries = 0; 60695fa0405SHaiyang Zhang int ret; 60795fa0405SHaiyang Zhang struct net_device *ndev; 60895fa0405SHaiyang Zhang 60995fa0405SHaiyang Zhang ndev = net_device->ndev; 61095fa0405SHaiyang Zhang 61195fa0405SHaiyang Zhang recvcompMessage.hdr.msg_type = 61295fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; 61395fa0405SHaiyang Zhang 61463f6921dSHaiyang Zhang recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; 61595fa0405SHaiyang Zhang 61695fa0405SHaiyang Zhang retry_send_cmplt: 61795fa0405SHaiyang Zhang /* Send the completion */ 6185b54dac8SHaiyang Zhang ret = vmbus_sendpacket(channel, &recvcompMessage, 61995fa0405SHaiyang Zhang sizeof(struct nvsp_message), transaction_id, 62095fa0405SHaiyang Zhang VM_PKT_COMP, 0); 62195fa0405SHaiyang Zhang if (ret == 0) { 62295fa0405SHaiyang Zhang /* success */ 62395fa0405SHaiyang Zhang /* no-op */ 62495fa0405SHaiyang Zhang } else if (ret == -EAGAIN) { 62595fa0405SHaiyang Zhang /* no more room...wait a bit and attempt to retry 3 times */ 62695fa0405SHaiyang Zhang retries++; 62795fa0405SHaiyang Zhang netdev_err(ndev, "unable to send receive completion pkt" 62895fa0405SHaiyang Zhang " (tid %llx)...retrying %d\n", transaction_id, retries); 62995fa0405SHaiyang Zhang 63095fa0405SHaiyang Zhang if (retries < 4) { 63195fa0405SHaiyang Zhang udelay(100); 63295fa0405SHaiyang Zhang goto retry_send_cmplt; 63395fa0405SHaiyang Zhang } else { 63495fa0405SHaiyang Zhang netdev_err(ndev, "unable to send receive " 63595fa0405SHaiyang Zhang "completion pkt (tid %llx)...give up retrying\n", 63695fa0405SHaiyang Zhang transaction_id); 63795fa0405SHaiyang Zhang } 63895fa0405SHaiyang Zhang } else { 63995fa0405SHaiyang Zhang netdev_err(ndev, "unable to send receive " 64095fa0405SHaiyang Zhang "completion pkt - %llx\n", transaction_id); 64195fa0405SHaiyang Zhang } 64295fa0405SHaiyang Zhang } 64395fa0405SHaiyang Zhang 64495fa0405SHaiyang Zhang /* Send a receive completion packet to RNDIS device (ie NetVsp) */ 64595fa0405SHaiyang Zhang static void netvsc_receive_completion(void *context) 64695fa0405SHaiyang Zhang { 64795fa0405SHaiyang Zhang struct hv_netvsc_packet *packet = context; 648c2fd03a0SJoe Perches struct hv_device *device = packet->device; 6495b54dac8SHaiyang Zhang struct vmbus_channel *channel; 65095fa0405SHaiyang Zhang struct netvsc_device *net_device; 65195fa0405SHaiyang Zhang u64 transaction_id = 0; 65295fa0405SHaiyang Zhang bool fsend_receive_comp = false; 65395fa0405SHaiyang Zhang unsigned long flags; 65495fa0405SHaiyang Zhang struct net_device *ndev; 65563f6921dSHaiyang Zhang u32 status = NVSP_STAT_NONE; 65695fa0405SHaiyang Zhang 65795fa0405SHaiyang Zhang /* 65895fa0405SHaiyang Zhang * Even though it seems logical to do a GetOutboundNetDevice() here to 65995fa0405SHaiyang Zhang * send out receive completion, we are using GetInboundNetDevice() 66095fa0405SHaiyang Zhang * since we may have disable outbound traffic already. 66195fa0405SHaiyang Zhang */ 66295fa0405SHaiyang Zhang net_device = get_inbound_net_device(device); 66395fa0405SHaiyang Zhang if (!net_device) 66495fa0405SHaiyang Zhang return; 66595fa0405SHaiyang Zhang ndev = net_device->ndev; 66695fa0405SHaiyang Zhang 66795fa0405SHaiyang Zhang /* Overloading use of the lock. */ 66895fa0405SHaiyang Zhang spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); 66995fa0405SHaiyang Zhang 67063f6921dSHaiyang Zhang if (packet->status != NVSP_STAT_SUCCESS) 67163f6921dSHaiyang Zhang packet->xfer_page_pkt->status = NVSP_STAT_FAIL; 67263f6921dSHaiyang Zhang 67395fa0405SHaiyang Zhang packet->xfer_page_pkt->count--; 67495fa0405SHaiyang Zhang 67595fa0405SHaiyang Zhang /* 67695fa0405SHaiyang Zhang * Last one in the line that represent 1 xfer page packet. 67795fa0405SHaiyang Zhang * Return the xfer page packet itself to the freelist 67895fa0405SHaiyang Zhang */ 67995fa0405SHaiyang Zhang if (packet->xfer_page_pkt->count == 0) { 68095fa0405SHaiyang Zhang fsend_receive_comp = true; 6815b54dac8SHaiyang Zhang channel = packet->xfer_page_pkt->channel; 68295fa0405SHaiyang Zhang transaction_id = packet->completion.recv.recv_completion_tid; 68363f6921dSHaiyang Zhang status = packet->xfer_page_pkt->status; 68495fa0405SHaiyang Zhang list_add_tail(&packet->xfer_page_pkt->list_ent, 68595fa0405SHaiyang Zhang &net_device->recv_pkt_list); 68695fa0405SHaiyang Zhang 68795fa0405SHaiyang Zhang } 68895fa0405SHaiyang Zhang 68995fa0405SHaiyang Zhang /* Put the packet back */ 69095fa0405SHaiyang Zhang list_add_tail(&packet->list_ent, &net_device->recv_pkt_list); 69195fa0405SHaiyang Zhang spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); 69295fa0405SHaiyang Zhang 69395fa0405SHaiyang Zhang /* Send a receive completion for the xfer page packet */ 69495fa0405SHaiyang Zhang if (fsend_receive_comp) 6955b54dac8SHaiyang Zhang netvsc_send_recv_completion(device, channel, net_device, 6965b54dac8SHaiyang Zhang transaction_id, status); 69795fa0405SHaiyang Zhang 69895fa0405SHaiyang Zhang } 69995fa0405SHaiyang Zhang 70097c1723aSKY Srinivasan static void netvsc_receive(struct netvsc_device *net_device, 7015b54dac8SHaiyang Zhang struct vmbus_channel *channel, 70297c1723aSKY Srinivasan struct hv_device *device, 70395fa0405SHaiyang Zhang struct vmpacket_descriptor *packet) 70495fa0405SHaiyang Zhang { 70595fa0405SHaiyang Zhang struct vmtransfer_page_packet_header *vmxferpage_packet; 70695fa0405SHaiyang Zhang struct nvsp_message *nvsp_packet; 70795fa0405SHaiyang Zhang struct hv_netvsc_packet *netvsc_packet = NULL; 70895fa0405SHaiyang Zhang /* struct netvsc_driver *netvscDriver; */ 70995fa0405SHaiyang Zhang struct xferpage_packet *xferpage_packet = NULL; 71045326342SHaiyang Zhang int i; 71145326342SHaiyang Zhang int count = 0; 71295fa0405SHaiyang Zhang unsigned long flags; 71395fa0405SHaiyang Zhang struct net_device *ndev; 71495fa0405SHaiyang Zhang 71595fa0405SHaiyang Zhang LIST_HEAD(listHead); 71695fa0405SHaiyang Zhang 71795fa0405SHaiyang Zhang ndev = net_device->ndev; 71895fa0405SHaiyang Zhang 71995fa0405SHaiyang Zhang /* 72095fa0405SHaiyang Zhang * All inbound packets other than send completion should be xfer page 72195fa0405SHaiyang Zhang * packet 72295fa0405SHaiyang Zhang */ 72395fa0405SHaiyang Zhang if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { 72495fa0405SHaiyang Zhang netdev_err(ndev, "Unknown packet type received - %d\n", 72595fa0405SHaiyang Zhang packet->type); 72695fa0405SHaiyang Zhang return; 72795fa0405SHaiyang Zhang } 72895fa0405SHaiyang Zhang 72995fa0405SHaiyang Zhang nvsp_packet = (struct nvsp_message *)((unsigned long)packet + 73095fa0405SHaiyang Zhang (packet->offset8 << 3)); 73195fa0405SHaiyang Zhang 73295fa0405SHaiyang Zhang /* Make sure this is a valid nvsp packet */ 73395fa0405SHaiyang Zhang if (nvsp_packet->hdr.msg_type != 73495fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { 73595fa0405SHaiyang Zhang netdev_err(ndev, "Unknown nvsp packet type received-" 73695fa0405SHaiyang Zhang " %d\n", nvsp_packet->hdr.msg_type); 73795fa0405SHaiyang Zhang return; 73895fa0405SHaiyang Zhang } 73995fa0405SHaiyang Zhang 74095fa0405SHaiyang Zhang vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; 74195fa0405SHaiyang Zhang 74295fa0405SHaiyang Zhang if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { 74395fa0405SHaiyang Zhang netdev_err(ndev, "Invalid xfer page set id - " 74495fa0405SHaiyang Zhang "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, 74595fa0405SHaiyang Zhang vmxferpage_packet->xfer_pageset_id); 74695fa0405SHaiyang Zhang return; 74795fa0405SHaiyang Zhang } 74895fa0405SHaiyang Zhang 74995fa0405SHaiyang Zhang /* 75095fa0405SHaiyang Zhang * Grab free packets (range count + 1) to represent this xfer 75195fa0405SHaiyang Zhang * page packet. +1 to represent the xfer page packet itself. 75295fa0405SHaiyang Zhang * We grab it here so that we know exactly how many we can 75395fa0405SHaiyang Zhang * fulfil 75495fa0405SHaiyang Zhang */ 75595fa0405SHaiyang Zhang spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); 75695fa0405SHaiyang Zhang while (!list_empty(&net_device->recv_pkt_list)) { 75795fa0405SHaiyang Zhang list_move_tail(net_device->recv_pkt_list.next, &listHead); 75895fa0405SHaiyang Zhang if (++count == vmxferpage_packet->range_cnt + 1) 75995fa0405SHaiyang Zhang break; 76095fa0405SHaiyang Zhang } 76195fa0405SHaiyang Zhang spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags); 76295fa0405SHaiyang Zhang 76395fa0405SHaiyang Zhang /* 76495fa0405SHaiyang Zhang * We need at least 2 netvsc pkts (1 to represent the xfer 76595fa0405SHaiyang Zhang * page and at least 1 for the range) i.e. we can handled 76695fa0405SHaiyang Zhang * some of the xfer page packet ranges... 76795fa0405SHaiyang Zhang */ 76895fa0405SHaiyang Zhang if (count < 2) { 76995fa0405SHaiyang Zhang netdev_err(ndev, "Got only %d netvsc pkt...needed " 77095fa0405SHaiyang Zhang "%d pkts. Dropping this xfer page packet completely!\n", 77195fa0405SHaiyang Zhang count, vmxferpage_packet->range_cnt + 1); 77295fa0405SHaiyang Zhang 77395fa0405SHaiyang Zhang /* Return it to the freelist */ 77495fa0405SHaiyang Zhang spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags); 77595fa0405SHaiyang Zhang for (i = count; i != 0; i--) { 77695fa0405SHaiyang Zhang list_move_tail(listHead.next, 77795fa0405SHaiyang Zhang &net_device->recv_pkt_list); 77895fa0405SHaiyang Zhang } 77995fa0405SHaiyang Zhang spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, 78095fa0405SHaiyang Zhang flags); 78195fa0405SHaiyang Zhang 7825b54dac8SHaiyang Zhang netvsc_send_recv_completion(device, channel, net_device, 78363f6921dSHaiyang Zhang vmxferpage_packet->d.trans_id, 78463f6921dSHaiyang Zhang NVSP_STAT_FAIL); 78595fa0405SHaiyang Zhang 78695fa0405SHaiyang Zhang return; 78795fa0405SHaiyang Zhang } 78895fa0405SHaiyang Zhang 78995fa0405SHaiyang Zhang /* Remove the 1st packet to represent the xfer page packet itself */ 79095fa0405SHaiyang Zhang xferpage_packet = (struct xferpage_packet *)listHead.next; 79195fa0405SHaiyang Zhang list_del(&xferpage_packet->list_ent); 79263f6921dSHaiyang Zhang xferpage_packet->status = NVSP_STAT_SUCCESS; 7935b54dac8SHaiyang Zhang xferpage_packet->channel = channel; 79495fa0405SHaiyang Zhang 79595fa0405SHaiyang Zhang /* This is how much we can satisfy */ 79695fa0405SHaiyang Zhang xferpage_packet->count = count - 1; 79795fa0405SHaiyang Zhang 79895fa0405SHaiyang Zhang if (xferpage_packet->count != vmxferpage_packet->range_cnt) { 79995fa0405SHaiyang Zhang netdev_err(ndev, "Needed %d netvsc pkts to satisfy " 80095fa0405SHaiyang Zhang "this xfer page...got %d\n", 80195fa0405SHaiyang Zhang vmxferpage_packet->range_cnt, xferpage_packet->count); 80295fa0405SHaiyang Zhang } 80395fa0405SHaiyang Zhang 80495fa0405SHaiyang Zhang /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ 80595fa0405SHaiyang Zhang for (i = 0; i < (count - 1); i++) { 80695fa0405SHaiyang Zhang netvsc_packet = (struct hv_netvsc_packet *)listHead.next; 80795fa0405SHaiyang Zhang list_del(&netvsc_packet->list_ent); 80895fa0405SHaiyang Zhang 80995fa0405SHaiyang Zhang /* Initialize the netvsc packet */ 81063f6921dSHaiyang Zhang netvsc_packet->status = NVSP_STAT_SUCCESS; 81195fa0405SHaiyang Zhang netvsc_packet->xfer_page_pkt = xferpage_packet; 81295fa0405SHaiyang Zhang netvsc_packet->completion.recv.recv_completion = 81395fa0405SHaiyang Zhang netvsc_receive_completion; 81495fa0405SHaiyang Zhang netvsc_packet->completion.recv.recv_completion_ctx = 81595fa0405SHaiyang Zhang netvsc_packet; 81695fa0405SHaiyang Zhang netvsc_packet->device = device; 81795fa0405SHaiyang Zhang /* Save this so that we can send it back */ 81895fa0405SHaiyang Zhang netvsc_packet->completion.recv.recv_completion_tid = 81995fa0405SHaiyang Zhang vmxferpage_packet->d.trans_id; 82095fa0405SHaiyang Zhang 82145326342SHaiyang Zhang netvsc_packet->data = (void *)((unsigned long)net_device-> 82245326342SHaiyang Zhang recv_buf + vmxferpage_packet->ranges[i].byte_offset); 82395fa0405SHaiyang Zhang netvsc_packet->total_data_buflen = 82495fa0405SHaiyang Zhang vmxferpage_packet->ranges[i].byte_count; 82595fa0405SHaiyang Zhang 82695fa0405SHaiyang Zhang /* Pass it to the upper layer */ 82795fa0405SHaiyang Zhang rndis_filter_receive(device, netvsc_packet); 82895fa0405SHaiyang Zhang 82995fa0405SHaiyang Zhang netvsc_receive_completion(netvsc_packet-> 83095fa0405SHaiyang Zhang completion.recv.recv_completion_ctx); 83195fa0405SHaiyang Zhang } 83295fa0405SHaiyang Zhang 83395fa0405SHaiyang Zhang } 83495fa0405SHaiyang Zhang 8355b54dac8SHaiyang Zhang 8365b54dac8SHaiyang Zhang static void netvsc_send_table(struct hv_device *hdev, 8375b54dac8SHaiyang Zhang struct vmpacket_descriptor *vmpkt) 8385b54dac8SHaiyang Zhang { 8395b54dac8SHaiyang Zhang struct netvsc_device *nvscdev; 8405b54dac8SHaiyang Zhang struct net_device *ndev; 8415b54dac8SHaiyang Zhang struct nvsp_message *nvmsg; 8425b54dac8SHaiyang Zhang int i; 8435b54dac8SHaiyang Zhang u32 count, *tab; 8445b54dac8SHaiyang Zhang 8455b54dac8SHaiyang Zhang nvscdev = get_outbound_net_device(hdev); 8465b54dac8SHaiyang Zhang if (!nvscdev) 8475b54dac8SHaiyang Zhang return; 8485b54dac8SHaiyang Zhang ndev = nvscdev->ndev; 8495b54dac8SHaiyang Zhang 8505b54dac8SHaiyang Zhang nvmsg = (struct nvsp_message *)((unsigned long)vmpkt + 8515b54dac8SHaiyang Zhang (vmpkt->offset8 << 3)); 8525b54dac8SHaiyang Zhang 8535b54dac8SHaiyang Zhang if (nvmsg->hdr.msg_type != NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE) 8545b54dac8SHaiyang Zhang return; 8555b54dac8SHaiyang Zhang 8565b54dac8SHaiyang Zhang count = nvmsg->msg.v5_msg.send_table.count; 8575b54dac8SHaiyang Zhang if (count != VRSS_SEND_TAB_SIZE) { 8585b54dac8SHaiyang Zhang netdev_err(ndev, "Received wrong send-table size:%u\n", count); 8595b54dac8SHaiyang Zhang return; 8605b54dac8SHaiyang Zhang } 8615b54dac8SHaiyang Zhang 8625b54dac8SHaiyang Zhang tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + 8635b54dac8SHaiyang Zhang nvmsg->msg.v5_msg.send_table.offset); 8645b54dac8SHaiyang Zhang 8655b54dac8SHaiyang Zhang for (i = 0; i < count; i++) 8665b54dac8SHaiyang Zhang nvscdev->send_table[i] = tab[i]; 8675b54dac8SHaiyang Zhang } 8685b54dac8SHaiyang Zhang 8695b54dac8SHaiyang Zhang void netvsc_channel_cb(void *context) 87095fa0405SHaiyang Zhang { 87195fa0405SHaiyang Zhang int ret; 8725b54dac8SHaiyang Zhang struct vmbus_channel *channel = (struct vmbus_channel *)context; 8735b54dac8SHaiyang Zhang struct hv_device *device; 87495fa0405SHaiyang Zhang struct netvsc_device *net_device; 87595fa0405SHaiyang Zhang u32 bytes_recvd; 87695fa0405SHaiyang Zhang u64 request_id; 87795fa0405SHaiyang Zhang struct vmpacket_descriptor *desc; 87895fa0405SHaiyang Zhang unsigned char *buffer; 87995fa0405SHaiyang Zhang int bufferlen = NETVSC_PACKET_SIZE; 88095fa0405SHaiyang Zhang struct net_device *ndev; 88195fa0405SHaiyang Zhang 8825b54dac8SHaiyang Zhang if (channel->primary_channel != NULL) 8835b54dac8SHaiyang Zhang device = channel->primary_channel->device_obj; 8845b54dac8SHaiyang Zhang else 8855b54dac8SHaiyang Zhang device = channel->device_obj; 8865b54dac8SHaiyang Zhang 88795fa0405SHaiyang Zhang net_device = get_inbound_net_device(device); 88895fa0405SHaiyang Zhang if (!net_device) 889ee0c4c39SKY Srinivasan return; 89095fa0405SHaiyang Zhang ndev = net_device->ndev; 8915b54dac8SHaiyang Zhang buffer = get_per_channel_state(channel); 89295fa0405SHaiyang Zhang 89395fa0405SHaiyang Zhang do { 8945b54dac8SHaiyang Zhang ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, 89595fa0405SHaiyang Zhang &bytes_recvd, &request_id); 89695fa0405SHaiyang Zhang if (ret == 0) { 89795fa0405SHaiyang Zhang if (bytes_recvd > 0) { 89895fa0405SHaiyang Zhang desc = (struct vmpacket_descriptor *)buffer; 89995fa0405SHaiyang Zhang switch (desc->type) { 90095fa0405SHaiyang Zhang case VM_PKT_COMP: 90197c1723aSKY Srinivasan netvsc_send_completion(net_device, 90297c1723aSKY Srinivasan device, desc); 90395fa0405SHaiyang Zhang break; 90495fa0405SHaiyang Zhang 90595fa0405SHaiyang Zhang case VM_PKT_DATA_USING_XFER_PAGES: 9065b54dac8SHaiyang Zhang netvsc_receive(net_device, channel, 90797c1723aSKY Srinivasan device, desc); 90895fa0405SHaiyang Zhang break; 90995fa0405SHaiyang Zhang 9105b54dac8SHaiyang Zhang case VM_PKT_DATA_INBAND: 9115b54dac8SHaiyang Zhang netvsc_send_table(device, desc); 9125b54dac8SHaiyang Zhang break; 9135b54dac8SHaiyang Zhang 91495fa0405SHaiyang Zhang default: 91595fa0405SHaiyang Zhang netdev_err(ndev, 91695fa0405SHaiyang Zhang "unhandled packet type %d, " 91795fa0405SHaiyang Zhang "tid %llx len %d\n", 91895fa0405SHaiyang Zhang desc->type, request_id, 91995fa0405SHaiyang Zhang bytes_recvd); 92095fa0405SHaiyang Zhang break; 92195fa0405SHaiyang Zhang } 92295fa0405SHaiyang Zhang 92395fa0405SHaiyang Zhang } else { 924ee0c4c39SKY Srinivasan /* 925ee0c4c39SKY Srinivasan * We are done for this pass. 926ee0c4c39SKY Srinivasan */ 92795fa0405SHaiyang Zhang break; 92895fa0405SHaiyang Zhang } 929ee0c4c39SKY Srinivasan 93095fa0405SHaiyang Zhang } else if (ret == -ENOBUFS) { 931ee0c4c39SKY Srinivasan if (bufferlen > NETVSC_PACKET_SIZE) 932ee0c4c39SKY Srinivasan kfree(buffer); 93395fa0405SHaiyang Zhang /* Handle large packet */ 93495fa0405SHaiyang Zhang buffer = kmalloc(bytes_recvd, GFP_ATOMIC); 93595fa0405SHaiyang Zhang if (buffer == NULL) { 93695fa0405SHaiyang Zhang /* Try again next time around */ 93795fa0405SHaiyang Zhang netdev_err(ndev, 93895fa0405SHaiyang Zhang "unable to allocate buffer of size " 93995fa0405SHaiyang Zhang "(%d)!!\n", bytes_recvd); 94095fa0405SHaiyang Zhang break; 94195fa0405SHaiyang Zhang } 94295fa0405SHaiyang Zhang 94395fa0405SHaiyang Zhang bufferlen = bytes_recvd; 94495fa0405SHaiyang Zhang } 94595fa0405SHaiyang Zhang } while (1); 94695fa0405SHaiyang Zhang 947ee0c4c39SKY Srinivasan if (bufferlen > NETVSC_PACKET_SIZE) 94895fa0405SHaiyang Zhang kfree(buffer); 94995fa0405SHaiyang Zhang return; 95095fa0405SHaiyang Zhang } 95195fa0405SHaiyang Zhang 95295fa0405SHaiyang Zhang /* 95395fa0405SHaiyang Zhang * netvsc_device_add - Callback when the device belonging to this 95495fa0405SHaiyang Zhang * driver is added 95595fa0405SHaiyang Zhang */ 95695fa0405SHaiyang Zhang int netvsc_device_add(struct hv_device *device, void *additional_info) 95795fa0405SHaiyang Zhang { 95895fa0405SHaiyang Zhang int ret = 0; 95995fa0405SHaiyang Zhang int i; 96095fa0405SHaiyang Zhang int ring_size = 96195fa0405SHaiyang Zhang ((struct netvsc_device_info *)additional_info)->ring_size; 96295fa0405SHaiyang Zhang struct netvsc_device *net_device; 96395fa0405SHaiyang Zhang struct hv_netvsc_packet *packet, *pos; 96495fa0405SHaiyang Zhang struct net_device *ndev; 96595fa0405SHaiyang Zhang 96695fa0405SHaiyang Zhang net_device = alloc_net_device(device); 96795fa0405SHaiyang Zhang if (!net_device) { 96895fa0405SHaiyang Zhang ret = -ENOMEM; 96995fa0405SHaiyang Zhang goto cleanup; 97095fa0405SHaiyang Zhang } 97195fa0405SHaiyang Zhang 9725b54dac8SHaiyang Zhang net_device->ring_size = ring_size; 9735b54dac8SHaiyang Zhang 97495fa0405SHaiyang Zhang /* 97595fa0405SHaiyang Zhang * Coming into this function, struct net_device * is 97695fa0405SHaiyang Zhang * registered as the driver private data. 97795fa0405SHaiyang Zhang * In alloc_net_device(), we register struct netvsc_device * 97895fa0405SHaiyang Zhang * as the driver private data and stash away struct net_device * 97995fa0405SHaiyang Zhang * in struct netvsc_device *. 98095fa0405SHaiyang Zhang */ 98195fa0405SHaiyang Zhang ndev = net_device->ndev; 98295fa0405SHaiyang Zhang 98395fa0405SHaiyang Zhang /* Initialize the NetVSC channel extension */ 98495fa0405SHaiyang Zhang spin_lock_init(&net_device->recv_pkt_list_lock); 98595fa0405SHaiyang Zhang 98695fa0405SHaiyang Zhang INIT_LIST_HEAD(&net_device->recv_pkt_list); 98795fa0405SHaiyang Zhang 98895fa0405SHaiyang Zhang for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { 9896562640bSHaiyang Zhang packet = kzalloc(sizeof(struct hv_netvsc_packet), GFP_KERNEL); 99095fa0405SHaiyang Zhang if (!packet) 99195fa0405SHaiyang Zhang break; 99295fa0405SHaiyang Zhang 99395fa0405SHaiyang Zhang list_add_tail(&packet->list_ent, 99495fa0405SHaiyang Zhang &net_device->recv_pkt_list); 99595fa0405SHaiyang Zhang } 99695fa0405SHaiyang Zhang init_completion(&net_device->channel_init_wait); 99795fa0405SHaiyang Zhang 9985b54dac8SHaiyang Zhang set_per_channel_state(device->channel, net_device->cb_buffer); 9995b54dac8SHaiyang Zhang 100095fa0405SHaiyang Zhang /* Open the channel */ 100195fa0405SHaiyang Zhang ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, 100295fa0405SHaiyang Zhang ring_size * PAGE_SIZE, NULL, 0, 10035b54dac8SHaiyang Zhang netvsc_channel_cb, device->channel); 100495fa0405SHaiyang Zhang 100595fa0405SHaiyang Zhang if (ret != 0) { 100695fa0405SHaiyang Zhang netdev_err(ndev, "unable to open channel: %d\n", ret); 100795fa0405SHaiyang Zhang goto cleanup; 100895fa0405SHaiyang Zhang } 100995fa0405SHaiyang Zhang 101095fa0405SHaiyang Zhang /* Channel is opened */ 101195fa0405SHaiyang Zhang pr_info("hv_netvsc channel opened successfully\n"); 101295fa0405SHaiyang Zhang 10135b54dac8SHaiyang Zhang net_device->chn_table[0] = device->channel; 10145b54dac8SHaiyang Zhang 101595fa0405SHaiyang Zhang /* Connect with the NetVsp */ 101695fa0405SHaiyang Zhang ret = netvsc_connect_vsp(device); 101795fa0405SHaiyang Zhang if (ret != 0) { 101895fa0405SHaiyang Zhang netdev_err(ndev, 101995fa0405SHaiyang Zhang "unable to connect to NetVSP - %d\n", ret); 102095fa0405SHaiyang Zhang goto close; 102195fa0405SHaiyang Zhang } 102295fa0405SHaiyang Zhang 102395fa0405SHaiyang Zhang return ret; 102495fa0405SHaiyang Zhang 102595fa0405SHaiyang Zhang close: 102695fa0405SHaiyang Zhang /* Now, we can close the channel safely */ 102795fa0405SHaiyang Zhang vmbus_close(device->channel); 102895fa0405SHaiyang Zhang 102995fa0405SHaiyang Zhang cleanup: 103095fa0405SHaiyang Zhang 103195fa0405SHaiyang Zhang if (net_device) { 103295fa0405SHaiyang Zhang list_for_each_entry_safe(packet, pos, 103395fa0405SHaiyang Zhang &net_device->recv_pkt_list, 103495fa0405SHaiyang Zhang list_ent) { 103595fa0405SHaiyang Zhang list_del(&packet->list_ent); 103695fa0405SHaiyang Zhang kfree(packet); 103795fa0405SHaiyang Zhang } 103895fa0405SHaiyang Zhang 103995fa0405SHaiyang Zhang kfree(net_device); 104095fa0405SHaiyang Zhang } 104195fa0405SHaiyang Zhang 104295fa0405SHaiyang Zhang return ret; 104395fa0405SHaiyang Zhang } 1044