diff options
Diffstat (limited to 'drivers/net/hyperv/rndis_filter.c')
| -rw-r--r-- | drivers/net/hyperv/rndis_filter.c | 60 |
1 files changed, 45 insertions, 15 deletions
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 1e88a10..928148c 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -32,23 +32,31 @@ #include "hyperv_net.h" +#define RNDIS_EXT_LEN 100 struct rndis_request { struct list_head list_ent; struct completion wait_event; + struct rndis_message response_msg; /* - * FIXME: We assumed a fixed size response here. If we do ever need to - * handle a bigger response, we can either define a max response - * message or add a response buffer variable above this field + * The buffer for extended info after the RNDIS response message. It's + * referenced based on the data offset in the RNDIS message. Its size + * is enough for current needs, and should be sufficient for the near + * future. */ - struct rndis_message response_msg; + u8 response_ext[RNDIS_EXT_LEN]; /* Simplify allocation by having a netvsc packet inline */ struct hv_netvsc_packet pkt; - struct hv_page_buffer buf; - /* FIXME: We assumed a fixed size request here. */ + /* Set 2 pages for rndis requests crossing page boundary */ + struct hv_page_buffer buf[2]; + struct rndis_message request_msg; - u8 ext[100]; + /* + * The buffer for the extended info after the RNDIS request message. + * It is referenced and sized in a similar way as response_ext. + */ + u8 request_ext[RNDIS_EXT_LEN]; }; static void rndis_filter_send_completion(void *ctx); @@ -221,6 +229,18 @@ static int rndis_filter_send_request(struct rndis_device *dev, packet->page_buf[0].offset = (unsigned long)&req->request_msg & (PAGE_SIZE - 1); + /* Add one page_buf when request_msg crossing page boundary */ + if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) { + packet->page_buf_cnt++; + packet->page_buf[0].len = PAGE_SIZE - + packet->page_buf[0].offset; + packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg + + packet->page_buf[0].len) >> PAGE_SHIFT; + packet->page_buf[1].offset = 0; + packet->page_buf[1].len = req->request_msg.msg_len - + packet->page_buf[0].len; + } + packet->completion.send.send_completion_ctx = req;/* packet; */ packet->completion.send.send_completion = rndis_filter_send_request_completion; @@ -255,7 +275,8 @@ static void rndis_filter_receive_response(struct rndis_device *dev, spin_unlock_irqrestore(&dev->request_lock, flags); if (found) { - if (resp->msg_len <= sizeof(struct rndis_message)) { + if (resp->msg_len <= + sizeof(struct rndis_message) + RNDIS_EXT_LEN) { memcpy(&request->response_msg, resp, resp->msg_len); } else { @@ -392,9 +413,12 @@ int rndis_filter_receive(struct hv_device *dev, struct rndis_device *rndis_dev; struct rndis_message *rndis_msg; struct net_device *ndev; + int ret = 0; - if (!net_dev) - return -EINVAL; + if (!net_dev) { + ret = -EINVAL; + goto exit; + } ndev = net_dev->ndev; @@ -402,14 +426,16 @@ int rndis_filter_receive(struct hv_device *dev, if (!net_dev->extension) { netdev_err(ndev, "got rndis message but no rndis device - " "dropping this message!\n"); - return -ENODEV; + ret = -ENODEV; + goto exit; } rndis_dev = (struct rndis_device *)net_dev->extension; if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) { netdev_err(ndev, "got rndis message but rndis device " "uninitialized...dropping this message!\n"); - return -ENODEV; + ret = -ENODEV; + goto exit; } rndis_msg = pkt->data; @@ -441,7 +467,11 @@ int rndis_filter_receive(struct hv_device *dev, break; } - return 0; +exit: + if (ret != 0) + pkt->status = NVSP_STAT_FAIL; + + return ret; } static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, @@ -641,6 +671,7 @@ int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter) if (t == 0) { netdev_err(ndev, "timeout before we got a set response...\n"); + ret = -ETIMEDOUT; /* * We can't deallocate the request since we may still receive a * send completion for it. @@ -678,8 +709,7 @@ static int rndis_filter_init_device(struct rndis_device *dev) init = &request->request_msg.msg.init_req; init->major_ver = RNDIS_MAJOR_VERSION; init->minor_ver = RNDIS_MINOR_VERSION; - /* FIXME: Use 1536 - rounded ethernet frame size */ - init->max_xfer_size = 2048; + init->max_xfer_size = 0x4000; dev->state = RNDIS_DEV_INITIALIZING; |
