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 unsigned long flags; 39195fa0405SHaiyang Zhang 39295fa0405SHaiyang Zhang net_device = hv_get_drvdata(device); 39395fa0405SHaiyang Zhang 39495fa0405SHaiyang Zhang netvsc_disconnect_vsp(net_device); 39595fa0405SHaiyang Zhang 39695fa0405SHaiyang Zhang /* 39795fa0405SHaiyang Zhang * Since we have already drained, we don't need to busy wait 39895fa0405SHaiyang Zhang * as was done in final_release_stor_device() 39995fa0405SHaiyang Zhang * Note that we cannot set the ext pointer to NULL until 40095fa0405SHaiyang Zhang * we have drained - to drain the outgoing packets, we need to 40195fa0405SHaiyang Zhang * allow incoming packets. 40295fa0405SHaiyang Zhang */ 40395fa0405SHaiyang Zhang 40495fa0405SHaiyang Zhang spin_lock_irqsave(&device->channel->inbound_lock, flags); 40595fa0405SHaiyang Zhang hv_set_drvdata(device, NULL); 40695fa0405SHaiyang Zhang spin_unlock_irqrestore(&device->channel->inbound_lock, flags); 40795fa0405SHaiyang Zhang 40895fa0405SHaiyang Zhang /* 40995fa0405SHaiyang Zhang * At this point, no one should be accessing net_device 41095fa0405SHaiyang Zhang * except in here 41195fa0405SHaiyang Zhang */ 41295fa0405SHaiyang Zhang dev_notice(&device->device, "net device safe to remove\n"); 41395fa0405SHaiyang Zhang 41495fa0405SHaiyang Zhang /* Now, we can close the channel safely */ 41595fa0405SHaiyang Zhang vmbus_close(device->channel); 41695fa0405SHaiyang Zhang 41795fa0405SHaiyang Zhang /* Release all resources */ 4185b54dac8SHaiyang Zhang if (net_device->sub_cb_buf) 4195b54dac8SHaiyang Zhang vfree(net_device->sub_cb_buf); 4205b54dac8SHaiyang Zhang 42195fa0405SHaiyang Zhang kfree(net_device); 42295fa0405SHaiyang Zhang return 0; 42395fa0405SHaiyang Zhang } 42495fa0405SHaiyang Zhang 42533be96e4SHaiyang Zhang 42633be96e4SHaiyang Zhang #define RING_AVAIL_PERCENT_HIWATER 20 42733be96e4SHaiyang Zhang #define RING_AVAIL_PERCENT_LOWATER 10 42833be96e4SHaiyang Zhang 42933be96e4SHaiyang Zhang /* 43033be96e4SHaiyang Zhang * Get the percentage of available bytes to write in the ring. 43133be96e4SHaiyang Zhang * The return value is in range from 0 to 100. 43233be96e4SHaiyang Zhang */ 43333be96e4SHaiyang Zhang static inline u32 hv_ringbuf_avail_percent( 43433be96e4SHaiyang Zhang struct hv_ring_buffer_info *ring_info) 43533be96e4SHaiyang Zhang { 43633be96e4SHaiyang Zhang u32 avail_read, avail_write; 43733be96e4SHaiyang Zhang 43833be96e4SHaiyang Zhang hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); 43933be96e4SHaiyang Zhang 44033be96e4SHaiyang Zhang return avail_write * 100 / ring_info->ring_datasize; 44133be96e4SHaiyang Zhang } 44233be96e4SHaiyang Zhang 44397c1723aSKY Srinivasan static void netvsc_send_completion(struct netvsc_device *net_device, 44497c1723aSKY Srinivasan struct hv_device *device, 44595fa0405SHaiyang Zhang struct vmpacket_descriptor *packet) 44695fa0405SHaiyang Zhang { 44795fa0405SHaiyang Zhang struct nvsp_message *nvsp_packet; 44895fa0405SHaiyang Zhang struct hv_netvsc_packet *nvsc_packet; 44995fa0405SHaiyang Zhang struct net_device *ndev; 45095fa0405SHaiyang Zhang 45195fa0405SHaiyang Zhang ndev = net_device->ndev; 45295fa0405SHaiyang Zhang 45395fa0405SHaiyang Zhang nvsp_packet = (struct nvsp_message *)((unsigned long)packet + 45495fa0405SHaiyang Zhang (packet->offset8 << 3)); 45595fa0405SHaiyang Zhang 45695fa0405SHaiyang Zhang if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || 45795fa0405SHaiyang Zhang (nvsp_packet->hdr.msg_type == 45895fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || 45995fa0405SHaiyang Zhang (nvsp_packet->hdr.msg_type == 4605b54dac8SHaiyang Zhang NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || 4615b54dac8SHaiyang Zhang (nvsp_packet->hdr.msg_type == 4625b54dac8SHaiyang Zhang NVSP_MSG5_TYPE_SUBCHANNEL)) { 46395fa0405SHaiyang Zhang /* Copy the response back */ 46495fa0405SHaiyang Zhang memcpy(&net_device->channel_init_pkt, nvsp_packet, 46595fa0405SHaiyang Zhang sizeof(struct nvsp_message)); 46695fa0405SHaiyang Zhang complete(&net_device->channel_init_wait); 46795fa0405SHaiyang Zhang } else if (nvsp_packet->hdr.msg_type == 46895fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { 46933be96e4SHaiyang Zhang int num_outstanding_sends; 4705b54dac8SHaiyang Zhang u16 q_idx = 0; 4715b54dac8SHaiyang Zhang struct vmbus_channel *channel = device->channel; 4725b54dac8SHaiyang Zhang int queue_sends; 47333be96e4SHaiyang Zhang 47495fa0405SHaiyang Zhang /* Get the send context */ 47595fa0405SHaiyang Zhang nvsc_packet = (struct hv_netvsc_packet *)(unsigned long) 47695fa0405SHaiyang Zhang packet->trans_id; 47795fa0405SHaiyang Zhang 47895fa0405SHaiyang Zhang /* Notify the layer above us */ 4795b54dac8SHaiyang Zhang if (nvsc_packet) { 4805b54dac8SHaiyang Zhang q_idx = nvsc_packet->q_idx; 4815b54dac8SHaiyang Zhang channel = nvsc_packet->channel; 482893f6627SHaiyang Zhang nvsc_packet->send_completion(nvsc_packet-> 483f1ea3cd7SHaiyang Zhang send_completion_ctx); 4845b54dac8SHaiyang Zhang } 48595fa0405SHaiyang Zhang 48633be96e4SHaiyang Zhang num_outstanding_sends = 48733be96e4SHaiyang Zhang atomic_dec_return(&net_device->num_outstanding_sends); 4885b54dac8SHaiyang Zhang queue_sends = atomic_dec_return(&net_device-> 4895b54dac8SHaiyang Zhang queue_sends[q_idx]); 4901d06825bSHaiyang Zhang 491dc5cd894SHaiyang Zhang if (net_device->destroy && num_outstanding_sends == 0) 492dc5cd894SHaiyang Zhang wake_up(&net_device->wait_drain); 493dc5cd894SHaiyang Zhang 4945b54dac8SHaiyang Zhang if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && 4955b54dac8SHaiyang Zhang !net_device->start_remove && 4965b54dac8SHaiyang Zhang (hv_ringbuf_avail_percent(&channel->outbound) > 4975b54dac8SHaiyang Zhang RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) 4985b54dac8SHaiyang Zhang netif_tx_wake_queue(netdev_get_tx_queue( 4995b54dac8SHaiyang Zhang ndev, q_idx)); 50095fa0405SHaiyang Zhang } else { 50195fa0405SHaiyang Zhang netdev_err(ndev, "Unknown send completion packet type- " 50295fa0405SHaiyang Zhang "%d received!!\n", nvsp_packet->hdr.msg_type); 50395fa0405SHaiyang Zhang } 50495fa0405SHaiyang Zhang 50595fa0405SHaiyang Zhang } 50695fa0405SHaiyang Zhang 50795fa0405SHaiyang Zhang int netvsc_send(struct hv_device *device, 50895fa0405SHaiyang Zhang struct hv_netvsc_packet *packet) 50995fa0405SHaiyang Zhang { 51095fa0405SHaiyang Zhang struct netvsc_device *net_device; 51195fa0405SHaiyang Zhang int ret = 0; 51295fa0405SHaiyang Zhang struct nvsp_message sendMessage; 51395fa0405SHaiyang Zhang struct net_device *ndev; 5145b54dac8SHaiyang Zhang struct vmbus_channel *out_channel = NULL; 515f1ea3cd7SHaiyang Zhang u64 req_id; 51695fa0405SHaiyang Zhang 51795fa0405SHaiyang Zhang net_device = get_outbound_net_device(device); 51895fa0405SHaiyang Zhang if (!net_device) 51995fa0405SHaiyang Zhang return -ENODEV; 52095fa0405SHaiyang Zhang ndev = net_device->ndev; 52195fa0405SHaiyang Zhang 52295fa0405SHaiyang Zhang sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; 52395fa0405SHaiyang Zhang if (packet->is_data_pkt) { 52495fa0405SHaiyang Zhang /* 0 is RMC_DATA; */ 52595fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0; 52695fa0405SHaiyang Zhang } else { 52795fa0405SHaiyang Zhang /* 1 is RMC_CONTROL; */ 52895fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1; 52995fa0405SHaiyang Zhang } 53095fa0405SHaiyang Zhang 53195fa0405SHaiyang Zhang /* Not using send buffer section */ 53295fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index = 53395fa0405SHaiyang Zhang 0xFFFFFFFF; 53495fa0405SHaiyang Zhang sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; 53595fa0405SHaiyang Zhang 536893f6627SHaiyang Zhang if (packet->send_completion) 53700ca8f0cSHaiyang Zhang req_id = (ulong)packet; 538f1ea3cd7SHaiyang Zhang else 539f1ea3cd7SHaiyang Zhang req_id = 0; 540f1ea3cd7SHaiyang Zhang 5415b54dac8SHaiyang Zhang out_channel = net_device->chn_table[packet->q_idx]; 5425b54dac8SHaiyang Zhang if (out_channel == NULL) 5435b54dac8SHaiyang Zhang out_channel = device->channel; 5445b54dac8SHaiyang Zhang packet->channel = out_channel; 5455b54dac8SHaiyang Zhang 54695fa0405SHaiyang Zhang if (packet->page_buf_cnt) { 5475b54dac8SHaiyang Zhang ret = vmbus_sendpacket_pagebuffer(out_channel, 54895fa0405SHaiyang Zhang packet->page_buf, 54995fa0405SHaiyang Zhang packet->page_buf_cnt, 55095fa0405SHaiyang Zhang &sendMessage, 55195fa0405SHaiyang Zhang sizeof(struct nvsp_message), 552f1ea3cd7SHaiyang Zhang req_id); 55395fa0405SHaiyang Zhang } else { 5545b54dac8SHaiyang Zhang ret = vmbus_sendpacket(out_channel, &sendMessage, 55595fa0405SHaiyang Zhang sizeof(struct nvsp_message), 556f1ea3cd7SHaiyang Zhang req_id, 55795fa0405SHaiyang Zhang VM_PKT_DATA_INBAND, 55895fa0405SHaiyang Zhang VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); 55995fa0405SHaiyang Zhang } 56095fa0405SHaiyang Zhang 5611d06825bSHaiyang Zhang if (ret == 0) { 5621d06825bSHaiyang Zhang atomic_inc(&net_device->num_outstanding_sends); 5635b54dac8SHaiyang Zhang atomic_inc(&net_device->queue_sends[packet->q_idx]); 5645b54dac8SHaiyang Zhang 5655b54dac8SHaiyang Zhang if (hv_ringbuf_avail_percent(&out_channel->outbound) < 56633be96e4SHaiyang Zhang RING_AVAIL_PERCENT_LOWATER) { 5675b54dac8SHaiyang Zhang netif_tx_stop_queue(netdev_get_tx_queue( 5685b54dac8SHaiyang Zhang ndev, packet->q_idx)); 5695b54dac8SHaiyang Zhang 57033be96e4SHaiyang Zhang if (atomic_read(&net_device-> 5715b54dac8SHaiyang Zhang queue_sends[packet->q_idx]) < 1) 5725b54dac8SHaiyang Zhang netif_tx_wake_queue(netdev_get_tx_queue( 5735b54dac8SHaiyang Zhang ndev, packet->q_idx)); 57433be96e4SHaiyang Zhang } 5751d06825bSHaiyang Zhang } else if (ret == -EAGAIN) { 5765b54dac8SHaiyang Zhang netif_tx_stop_queue(netdev_get_tx_queue( 5775b54dac8SHaiyang Zhang ndev, packet->q_idx)); 5785b54dac8SHaiyang Zhang if (atomic_read(&net_device->queue_sends[packet->q_idx]) < 1) { 5795b54dac8SHaiyang Zhang netif_tx_wake_queue(netdev_get_tx_queue( 5805b54dac8SHaiyang Zhang ndev, packet->q_idx)); 58133be96e4SHaiyang Zhang ret = -ENOSPC; 58233be96e4SHaiyang Zhang } 5831d06825bSHaiyang Zhang } else { 58495fa0405SHaiyang Zhang netdev_err(ndev, "Unable to send packet %p ret %d\n", 58595fa0405SHaiyang Zhang packet, ret); 5861d06825bSHaiyang Zhang } 58795fa0405SHaiyang Zhang 58895fa0405SHaiyang Zhang return ret; 58995fa0405SHaiyang Zhang } 59095fa0405SHaiyang Zhang 59195fa0405SHaiyang Zhang static void netvsc_send_recv_completion(struct hv_device *device, 5925b54dac8SHaiyang Zhang struct vmbus_channel *channel, 59397c1723aSKY Srinivasan struct netvsc_device *net_device, 59463f6921dSHaiyang Zhang u64 transaction_id, u32 status) 59595fa0405SHaiyang Zhang { 59695fa0405SHaiyang Zhang struct nvsp_message recvcompMessage; 59795fa0405SHaiyang Zhang int retries = 0; 59895fa0405SHaiyang Zhang int ret; 59995fa0405SHaiyang Zhang struct net_device *ndev; 60095fa0405SHaiyang Zhang 60195fa0405SHaiyang Zhang ndev = net_device->ndev; 60295fa0405SHaiyang Zhang 60395fa0405SHaiyang Zhang recvcompMessage.hdr.msg_type = 60495fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; 60595fa0405SHaiyang Zhang 60663f6921dSHaiyang Zhang recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; 60795fa0405SHaiyang Zhang 60895fa0405SHaiyang Zhang retry_send_cmplt: 60995fa0405SHaiyang Zhang /* Send the completion */ 6105b54dac8SHaiyang Zhang ret = vmbus_sendpacket(channel, &recvcompMessage, 61195fa0405SHaiyang Zhang sizeof(struct nvsp_message), transaction_id, 61295fa0405SHaiyang Zhang VM_PKT_COMP, 0); 61395fa0405SHaiyang Zhang if (ret == 0) { 61495fa0405SHaiyang Zhang /* success */ 61595fa0405SHaiyang Zhang /* no-op */ 61695fa0405SHaiyang Zhang } else if (ret == -EAGAIN) { 61795fa0405SHaiyang Zhang /* no more room...wait a bit and attempt to retry 3 times */ 61895fa0405SHaiyang Zhang retries++; 61995fa0405SHaiyang Zhang netdev_err(ndev, "unable to send receive completion pkt" 62095fa0405SHaiyang Zhang " (tid %llx)...retrying %d\n", transaction_id, retries); 62195fa0405SHaiyang Zhang 62295fa0405SHaiyang Zhang if (retries < 4) { 62395fa0405SHaiyang Zhang udelay(100); 62495fa0405SHaiyang Zhang goto retry_send_cmplt; 62595fa0405SHaiyang Zhang } else { 62695fa0405SHaiyang Zhang netdev_err(ndev, "unable to send receive " 62795fa0405SHaiyang Zhang "completion pkt (tid %llx)...give up retrying\n", 62895fa0405SHaiyang Zhang transaction_id); 62995fa0405SHaiyang Zhang } 63095fa0405SHaiyang Zhang } else { 63195fa0405SHaiyang Zhang netdev_err(ndev, "unable to send receive " 63295fa0405SHaiyang Zhang "completion pkt - %llx\n", transaction_id); 63395fa0405SHaiyang Zhang } 63495fa0405SHaiyang Zhang } 63595fa0405SHaiyang Zhang 63697c1723aSKY Srinivasan static void netvsc_receive(struct netvsc_device *net_device, 6375b54dac8SHaiyang Zhang struct vmbus_channel *channel, 63897c1723aSKY Srinivasan struct hv_device *device, 63995fa0405SHaiyang Zhang struct vmpacket_descriptor *packet) 64095fa0405SHaiyang Zhang { 64195fa0405SHaiyang Zhang struct vmtransfer_page_packet_header *vmxferpage_packet; 64295fa0405SHaiyang Zhang struct nvsp_message *nvsp_packet; 6434baab261SHaiyang Zhang struct hv_netvsc_packet nv_pkt; 6444baab261SHaiyang Zhang struct hv_netvsc_packet *netvsc_packet = &nv_pkt; 6454baab261SHaiyang Zhang u32 status = NVSP_STAT_SUCCESS; 64645326342SHaiyang Zhang int i; 64745326342SHaiyang Zhang int count = 0; 64895fa0405SHaiyang Zhang struct net_device *ndev; 64995fa0405SHaiyang Zhang 65095fa0405SHaiyang Zhang ndev = net_device->ndev; 65195fa0405SHaiyang Zhang 65295fa0405SHaiyang Zhang /* 65395fa0405SHaiyang Zhang * All inbound packets other than send completion should be xfer page 65495fa0405SHaiyang Zhang * packet 65595fa0405SHaiyang Zhang */ 65695fa0405SHaiyang Zhang if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { 65795fa0405SHaiyang Zhang netdev_err(ndev, "Unknown packet type received - %d\n", 65895fa0405SHaiyang Zhang packet->type); 65995fa0405SHaiyang Zhang return; 66095fa0405SHaiyang Zhang } 66195fa0405SHaiyang Zhang 66295fa0405SHaiyang Zhang nvsp_packet = (struct nvsp_message *)((unsigned long)packet + 66395fa0405SHaiyang Zhang (packet->offset8 << 3)); 66495fa0405SHaiyang Zhang 66595fa0405SHaiyang Zhang /* Make sure this is a valid nvsp packet */ 66695fa0405SHaiyang Zhang if (nvsp_packet->hdr.msg_type != 66795fa0405SHaiyang Zhang NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { 66895fa0405SHaiyang Zhang netdev_err(ndev, "Unknown nvsp packet type received-" 66995fa0405SHaiyang Zhang " %d\n", nvsp_packet->hdr.msg_type); 67095fa0405SHaiyang Zhang return; 67195fa0405SHaiyang Zhang } 67295fa0405SHaiyang Zhang 67395fa0405SHaiyang Zhang vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; 67495fa0405SHaiyang Zhang 67595fa0405SHaiyang Zhang if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { 67695fa0405SHaiyang Zhang netdev_err(ndev, "Invalid xfer page set id - " 67795fa0405SHaiyang Zhang "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, 67895fa0405SHaiyang Zhang vmxferpage_packet->xfer_pageset_id); 67995fa0405SHaiyang Zhang return; 68095fa0405SHaiyang Zhang } 68195fa0405SHaiyang Zhang 6824baab261SHaiyang Zhang count = vmxferpage_packet->range_cnt; 6834baab261SHaiyang Zhang netvsc_packet->device = device; 6844baab261SHaiyang Zhang netvsc_packet->channel = channel; 68595fa0405SHaiyang Zhang 68695fa0405SHaiyang Zhang /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ 6874baab261SHaiyang Zhang for (i = 0; i < count; i++) { 68895fa0405SHaiyang Zhang /* Initialize the netvsc packet */ 68963f6921dSHaiyang Zhang netvsc_packet->status = NVSP_STAT_SUCCESS; 69045326342SHaiyang Zhang netvsc_packet->data = (void *)((unsigned long)net_device-> 69145326342SHaiyang Zhang recv_buf + vmxferpage_packet->ranges[i].byte_offset); 69295fa0405SHaiyang Zhang netvsc_packet->total_data_buflen = 69395fa0405SHaiyang Zhang vmxferpage_packet->ranges[i].byte_count; 69495fa0405SHaiyang Zhang 69595fa0405SHaiyang Zhang /* Pass it to the upper layer */ 69695fa0405SHaiyang Zhang rndis_filter_receive(device, netvsc_packet); 69795fa0405SHaiyang Zhang 6984baab261SHaiyang Zhang if (netvsc_packet->status != NVSP_STAT_SUCCESS) 6994baab261SHaiyang Zhang status = NVSP_STAT_FAIL; 70095fa0405SHaiyang Zhang } 70195fa0405SHaiyang Zhang 7024baab261SHaiyang Zhang netvsc_send_recv_completion(device, channel, net_device, 7034baab261SHaiyang Zhang vmxferpage_packet->d.trans_id, status); 70495fa0405SHaiyang Zhang } 70595fa0405SHaiyang Zhang 7065b54dac8SHaiyang Zhang 7075b54dac8SHaiyang Zhang static void netvsc_send_table(struct hv_device *hdev, 7085b54dac8SHaiyang Zhang struct vmpacket_descriptor *vmpkt) 7095b54dac8SHaiyang Zhang { 7105b54dac8SHaiyang Zhang struct netvsc_device *nvscdev; 7115b54dac8SHaiyang Zhang struct net_device *ndev; 7125b54dac8SHaiyang Zhang struct nvsp_message *nvmsg; 7135b54dac8SHaiyang Zhang int i; 7145b54dac8SHaiyang Zhang u32 count, *tab; 7155b54dac8SHaiyang Zhang 7165b54dac8SHaiyang Zhang nvscdev = get_outbound_net_device(hdev); 7175b54dac8SHaiyang Zhang if (!nvscdev) 7185b54dac8SHaiyang Zhang return; 7195b54dac8SHaiyang Zhang ndev = nvscdev->ndev; 7205b54dac8SHaiyang Zhang 7215b54dac8SHaiyang Zhang nvmsg = (struct nvsp_message *)((unsigned long)vmpkt + 7225b54dac8SHaiyang Zhang (vmpkt->offset8 << 3)); 7235b54dac8SHaiyang Zhang 7245b54dac8SHaiyang Zhang if (nvmsg->hdr.msg_type != NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE) 7255b54dac8SHaiyang Zhang return; 7265b54dac8SHaiyang Zhang 7275b54dac8SHaiyang Zhang count = nvmsg->msg.v5_msg.send_table.count; 7285b54dac8SHaiyang Zhang if (count != VRSS_SEND_TAB_SIZE) { 7295b54dac8SHaiyang Zhang netdev_err(ndev, "Received wrong send-table size:%u\n", count); 7305b54dac8SHaiyang Zhang return; 7315b54dac8SHaiyang Zhang } 7325b54dac8SHaiyang Zhang 7335b54dac8SHaiyang Zhang tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + 7345b54dac8SHaiyang Zhang nvmsg->msg.v5_msg.send_table.offset); 7355b54dac8SHaiyang Zhang 7365b54dac8SHaiyang Zhang for (i = 0; i < count; i++) 7375b54dac8SHaiyang Zhang nvscdev->send_table[i] = tab[i]; 7385b54dac8SHaiyang Zhang } 7395b54dac8SHaiyang Zhang 7405b54dac8SHaiyang Zhang void netvsc_channel_cb(void *context) 74195fa0405SHaiyang Zhang { 74295fa0405SHaiyang Zhang int ret; 7435b54dac8SHaiyang Zhang struct vmbus_channel *channel = (struct vmbus_channel *)context; 7445b54dac8SHaiyang Zhang struct hv_device *device; 74595fa0405SHaiyang Zhang struct netvsc_device *net_device; 74695fa0405SHaiyang Zhang u32 bytes_recvd; 74795fa0405SHaiyang Zhang u64 request_id; 74895fa0405SHaiyang Zhang struct vmpacket_descriptor *desc; 74995fa0405SHaiyang Zhang unsigned char *buffer; 75095fa0405SHaiyang Zhang int bufferlen = NETVSC_PACKET_SIZE; 75195fa0405SHaiyang Zhang struct net_device *ndev; 75295fa0405SHaiyang Zhang 7535b54dac8SHaiyang Zhang if (channel->primary_channel != NULL) 7545b54dac8SHaiyang Zhang device = channel->primary_channel->device_obj; 7555b54dac8SHaiyang Zhang else 7565b54dac8SHaiyang Zhang device = channel->device_obj; 7575b54dac8SHaiyang Zhang 75895fa0405SHaiyang Zhang net_device = get_inbound_net_device(device); 75995fa0405SHaiyang Zhang if (!net_device) 760ee0c4c39SKY Srinivasan return; 76195fa0405SHaiyang Zhang ndev = net_device->ndev; 7625b54dac8SHaiyang Zhang buffer = get_per_channel_state(channel); 76395fa0405SHaiyang Zhang 76495fa0405SHaiyang Zhang do { 7655b54dac8SHaiyang Zhang ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, 76695fa0405SHaiyang Zhang &bytes_recvd, &request_id); 76795fa0405SHaiyang Zhang if (ret == 0) { 76895fa0405SHaiyang Zhang if (bytes_recvd > 0) { 76995fa0405SHaiyang Zhang desc = (struct vmpacket_descriptor *)buffer; 77095fa0405SHaiyang Zhang switch (desc->type) { 77195fa0405SHaiyang Zhang case VM_PKT_COMP: 77297c1723aSKY Srinivasan netvsc_send_completion(net_device, 77397c1723aSKY Srinivasan device, desc); 77495fa0405SHaiyang Zhang break; 77595fa0405SHaiyang Zhang 77695fa0405SHaiyang Zhang case VM_PKT_DATA_USING_XFER_PAGES: 7775b54dac8SHaiyang Zhang netvsc_receive(net_device, channel, 77897c1723aSKY Srinivasan device, desc); 77995fa0405SHaiyang Zhang break; 78095fa0405SHaiyang Zhang 7815b54dac8SHaiyang Zhang case VM_PKT_DATA_INBAND: 7825b54dac8SHaiyang Zhang netvsc_send_table(device, desc); 7835b54dac8SHaiyang Zhang break; 7845b54dac8SHaiyang Zhang 78595fa0405SHaiyang Zhang default: 78695fa0405SHaiyang Zhang netdev_err(ndev, 78795fa0405SHaiyang Zhang "unhandled packet type %d, " 78895fa0405SHaiyang Zhang "tid %llx len %d\n", 78995fa0405SHaiyang Zhang desc->type, request_id, 79095fa0405SHaiyang Zhang bytes_recvd); 79195fa0405SHaiyang Zhang break; 79295fa0405SHaiyang Zhang } 79395fa0405SHaiyang Zhang 79495fa0405SHaiyang Zhang } else { 795ee0c4c39SKY Srinivasan /* 796ee0c4c39SKY Srinivasan * We are done for this pass. 797ee0c4c39SKY Srinivasan */ 79895fa0405SHaiyang Zhang break; 79995fa0405SHaiyang Zhang } 800ee0c4c39SKY Srinivasan 80195fa0405SHaiyang Zhang } else if (ret == -ENOBUFS) { 802ee0c4c39SKY Srinivasan if (bufferlen > NETVSC_PACKET_SIZE) 803ee0c4c39SKY Srinivasan kfree(buffer); 80495fa0405SHaiyang Zhang /* Handle large packet */ 80595fa0405SHaiyang Zhang buffer = kmalloc(bytes_recvd, GFP_ATOMIC); 80695fa0405SHaiyang Zhang if (buffer == NULL) { 80795fa0405SHaiyang Zhang /* Try again next time around */ 80895fa0405SHaiyang Zhang netdev_err(ndev, 80995fa0405SHaiyang Zhang "unable to allocate buffer of size " 81095fa0405SHaiyang Zhang "(%d)!!\n", bytes_recvd); 81195fa0405SHaiyang Zhang break; 81295fa0405SHaiyang Zhang } 81395fa0405SHaiyang Zhang 81495fa0405SHaiyang Zhang bufferlen = bytes_recvd; 81595fa0405SHaiyang Zhang } 81695fa0405SHaiyang Zhang } while (1); 81795fa0405SHaiyang Zhang 818ee0c4c39SKY Srinivasan if (bufferlen > NETVSC_PACKET_SIZE) 81995fa0405SHaiyang Zhang kfree(buffer); 82095fa0405SHaiyang Zhang return; 82195fa0405SHaiyang Zhang } 82295fa0405SHaiyang Zhang 82395fa0405SHaiyang Zhang /* 82495fa0405SHaiyang Zhang * netvsc_device_add - Callback when the device belonging to this 82595fa0405SHaiyang Zhang * driver is added 82695fa0405SHaiyang Zhang */ 82795fa0405SHaiyang Zhang int netvsc_device_add(struct hv_device *device, void *additional_info) 82895fa0405SHaiyang Zhang { 82995fa0405SHaiyang Zhang int ret = 0; 83095fa0405SHaiyang Zhang int ring_size = 83195fa0405SHaiyang Zhang ((struct netvsc_device_info *)additional_info)->ring_size; 83295fa0405SHaiyang Zhang struct netvsc_device *net_device; 83395fa0405SHaiyang Zhang struct net_device *ndev; 83495fa0405SHaiyang Zhang 83595fa0405SHaiyang Zhang net_device = alloc_net_device(device); 83695fa0405SHaiyang Zhang if (!net_device) { 83795fa0405SHaiyang Zhang ret = -ENOMEM; 83895fa0405SHaiyang Zhang goto cleanup; 83995fa0405SHaiyang Zhang } 84095fa0405SHaiyang Zhang 8415b54dac8SHaiyang Zhang net_device->ring_size = ring_size; 8425b54dac8SHaiyang Zhang 84395fa0405SHaiyang Zhang /* 84495fa0405SHaiyang Zhang * Coming into this function, struct net_device * is 84595fa0405SHaiyang Zhang * registered as the driver private data. 84695fa0405SHaiyang Zhang * In alloc_net_device(), we register struct netvsc_device * 84795fa0405SHaiyang Zhang * as the driver private data and stash away struct net_device * 84895fa0405SHaiyang Zhang * in struct netvsc_device *. 84995fa0405SHaiyang Zhang */ 85095fa0405SHaiyang Zhang ndev = net_device->ndev; 85195fa0405SHaiyang Zhang 85295fa0405SHaiyang Zhang /* Initialize the NetVSC channel extension */ 85395fa0405SHaiyang Zhang init_completion(&net_device->channel_init_wait); 85495fa0405SHaiyang Zhang 8555b54dac8SHaiyang Zhang set_per_channel_state(device->channel, net_device->cb_buffer); 8565b54dac8SHaiyang Zhang 85795fa0405SHaiyang Zhang /* Open the channel */ 85895fa0405SHaiyang Zhang ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, 85995fa0405SHaiyang Zhang ring_size * PAGE_SIZE, NULL, 0, 8605b54dac8SHaiyang Zhang netvsc_channel_cb, device->channel); 86195fa0405SHaiyang Zhang 86295fa0405SHaiyang Zhang if (ret != 0) { 86395fa0405SHaiyang Zhang netdev_err(ndev, "unable to open channel: %d\n", ret); 86495fa0405SHaiyang Zhang goto cleanup; 86595fa0405SHaiyang Zhang } 86695fa0405SHaiyang Zhang 86795fa0405SHaiyang Zhang /* Channel is opened */ 86895fa0405SHaiyang Zhang pr_info("hv_netvsc channel opened successfully\n"); 86995fa0405SHaiyang Zhang 8705b54dac8SHaiyang Zhang net_device->chn_table[0] = device->channel; 8715b54dac8SHaiyang Zhang 87295fa0405SHaiyang Zhang /* Connect with the NetVsp */ 87395fa0405SHaiyang Zhang ret = netvsc_connect_vsp(device); 87495fa0405SHaiyang Zhang if (ret != 0) { 87595fa0405SHaiyang Zhang netdev_err(ndev, 87695fa0405SHaiyang Zhang "unable to connect to NetVSP - %d\n", ret); 87795fa0405SHaiyang Zhang goto close; 87895fa0405SHaiyang Zhang } 87995fa0405SHaiyang Zhang 88095fa0405SHaiyang Zhang return ret; 88195fa0405SHaiyang Zhang 88295fa0405SHaiyang Zhang close: 88395fa0405SHaiyang Zhang /* Now, we can close the channel safely */ 88495fa0405SHaiyang Zhang vmbus_close(device->channel); 88595fa0405SHaiyang Zhang 88695fa0405SHaiyang Zhang cleanup: 88795fa0405SHaiyang Zhang 8884baab261SHaiyang Zhang if (net_device) 88995fa0405SHaiyang Zhang kfree(net_device); 89095fa0405SHaiyang Zhang 89195fa0405SHaiyang Zhang return ret; 89295fa0405SHaiyang Zhang } 893