diff options
Diffstat (limited to 'drivers/hv/channel.c')
| -rw-r--r-- | drivers/hv/channel.c | 143 |
1 files changed, 37 insertions, 106 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index e57cc40cb768..efd5db743319 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -177,6 +177,11 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, &vmbus_connection.chn_msg_list); spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); + if (newchannel->rescind) { + err = -ENODEV; + goto error_free_gpadl; + } + ret = vmbus_post_msg(open_msg, sizeof(struct vmbus_channel_open_channel), true); @@ -421,6 +426,11 @@ int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); + if (channel->rescind) { + ret = -ENODEV; + goto cleanup; + } + ret = vmbus_post_msg(gpadlmsg, msginfo->msgsize - sizeof(*msginfo), true); if (ret != 0) @@ -494,6 +504,10 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) list_add_tail(&info->msglistentry, &vmbus_connection.chn_msg_list); spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); + + if (channel->rescind) + goto post_msg_err; + ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_gpadl_teardown), true); @@ -647,9 +661,23 @@ void vmbus_close(struct vmbus_channel *channel) } EXPORT_SYMBOL_GPL(vmbus_close); -int vmbus_sendpacket_ctl(struct vmbus_channel *channel, void *buffer, - u32 bufferlen, u64 requestid, - enum vmbus_packet_type type, u32 flags) +/** + * vmbus_sendpacket() - Send the specified buffer on the given channel + * @channel: Pointer to vmbus_channel structure. + * @buffer: Pointer to the buffer you want to receive the data into. + * @bufferlen: Maximum size of what the the buffer will hold + * @requestid: Identifier of the request + * @type: Type of packet that is being send e.g. negotiate, time + * packet etc. + * + * Sends data in @buffer directly to hyper-v via the vmbus + * This will send the data unparsed to hyper-v. + * + * Mainly used by Hyper-V drivers. + */ +int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, + u32 bufferlen, u64 requestid, + enum vmbus_packet_type type, u32 flags) { struct vmpacket_descriptor desc; u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; @@ -676,42 +704,19 @@ int vmbus_sendpacket_ctl(struct vmbus_channel *channel, void *buffer, return hv_ringbuffer_write(channel, bufferlist, num_vecs); } -EXPORT_SYMBOL(vmbus_sendpacket_ctl); - -/** - * vmbus_sendpacket() - Send the specified buffer on the given channel - * @channel: Pointer to vmbus_channel structure. - * @buffer: Pointer to the buffer you want to receive the data into. - * @bufferlen: Maximum size of what the the buffer will hold - * @requestid: Identifier of the request - * @type: Type of packet that is being send e.g. negotiate, time - * packet etc. - * - * Sends data in @buffer directly to hyper-v via the vmbus - * This will send the data unparsed to hyper-v. - * - * Mainly used by Hyper-V drivers. - */ -int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, - u32 bufferlen, u64 requestid, - enum vmbus_packet_type type, u32 flags) -{ - return vmbus_sendpacket_ctl(channel, buffer, bufferlen, requestid, - type, flags); -} EXPORT_SYMBOL(vmbus_sendpacket); /* - * vmbus_sendpacket_pagebuffer_ctl - Send a range of single-page buffer + * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer * packets using a GPADL Direct packet type. This interface allows you * to control notifying the host. This will be useful for sending * batched data. Also the sender can control the send flags * explicitly. */ -int vmbus_sendpacket_pagebuffer_ctl(struct vmbus_channel *channel, - struct hv_page_buffer pagebuffers[], - u32 pagecount, void *buffer, u32 bufferlen, - u64 requestid, u32 flags) +int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, + struct hv_page_buffer pagebuffers[], + u32 pagecount, void *buffer, u32 bufferlen, + u64 requestid) { int i; struct vmbus_channel_packet_page_buffer desc; @@ -736,7 +741,7 @@ int vmbus_sendpacket_pagebuffer_ctl(struct vmbus_channel *channel, /* Setup the descriptor */ desc.type = VM_PKT_DATA_USING_GPA_DIRECT; - desc.flags = flags; + desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; desc.dataoffset8 = descsize >> 3; /* in 8-bytes granularity */ desc.length8 = (u16)(packetlen_aligned >> 3); desc.transactionid = requestid; @@ -757,24 +762,6 @@ int vmbus_sendpacket_pagebuffer_ctl(struct vmbus_channel *channel, return hv_ringbuffer_write(channel, bufferlist, 3); } -EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer_ctl); - -/* - * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer - * packets using a GPADL Direct packet type. - */ -int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, - struct hv_page_buffer pagebuffers[], - u32 pagecount, void *buffer, u32 bufferlen, - u64 requestid) -{ - u32 flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; - - return vmbus_sendpacket_pagebuffer_ctl(channel, pagebuffers, pagecount, - buffer, bufferlen, - requestid, flags); - -} EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); /* @@ -814,62 +801,6 @@ int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, } EXPORT_SYMBOL_GPL(vmbus_sendpacket_mpb_desc); -/* - * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet - * using a GPADL Direct packet type. - */ -int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, - struct hv_multipage_buffer *multi_pagebuffer, - void *buffer, u32 bufferlen, u64 requestid) -{ - struct vmbus_channel_packet_multipage_buffer desc; - u32 descsize; - u32 packetlen; - u32 packetlen_aligned; - struct kvec bufferlist[3]; - u64 aligned_data = 0; - u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset, - multi_pagebuffer->len); - - if (pfncount > MAX_MULTIPAGE_BUFFER_COUNT) - return -EINVAL; - - /* - * Adjust the size down since vmbus_channel_packet_multipage_buffer is - * the largest size we support - */ - descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - - ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * - sizeof(u64)); - packetlen = descsize + bufferlen; - packetlen_aligned = ALIGN(packetlen, sizeof(u64)); - - - /* Setup the descriptor */ - desc.type = VM_PKT_DATA_USING_GPA_DIRECT; - desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; - desc.dataoffset8 = descsize >> 3; /* in 8-bytes granularity */ - desc.length8 = (u16)(packetlen_aligned >> 3); - desc.transactionid = requestid; - desc.rangecount = 1; - - desc.range.len = multi_pagebuffer->len; - desc.range.offset = multi_pagebuffer->offset; - - memcpy(desc.range.pfn_array, multi_pagebuffer->pfn_array, - pfncount * sizeof(u64)); - - bufferlist[0].iov_base = &desc; - bufferlist[0].iov_len = descsize; - bufferlist[1].iov_base = buffer; - bufferlist[1].iov_len = bufferlen; - bufferlist[2].iov_base = &aligned_data; - bufferlist[2].iov_len = (packetlen_aligned - packetlen); - - return hv_ringbuffer_write(channel, bufferlist, 3); -} -EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); - /** * vmbus_recvpacket() - Retrieve the user packet on the specified channel * @channel: Pointer to vmbus_channel structure. |