Drivers: hv: vmbus: Mark vmbus ring buffer visible to host in Isolation VM
Mark vmbus ring buffer visible with set_memory_decrypted() when establish gpadl handle. Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Link: https://lore.kernel.org/r/20211025122116.264793-5-ltykernel@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
parent
810a521265
commit
d4dccf353d
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@ -17,6 +17,7 @@
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#include <linux/hyperv.h>
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#include <linux/hyperv.h>
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#include <linux/uio.h>
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#include <linux/uio.h>
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#include <linux/interrupt.h>
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#include <linux/interrupt.h>
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#include <linux/set_memory.h>
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#include <asm/page.h>
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#include <asm/page.h>
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#include <asm/mshyperv.h>
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#include <asm/mshyperv.h>
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@ -456,7 +457,7 @@ nomem:
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static int __vmbus_establish_gpadl(struct vmbus_channel *channel,
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static int __vmbus_establish_gpadl(struct vmbus_channel *channel,
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enum hv_gpadl_type type, void *kbuffer,
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enum hv_gpadl_type type, void *kbuffer,
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u32 size, u32 send_offset,
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u32 size, u32 send_offset,
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u32 *gpadl_handle)
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struct vmbus_gpadl *gpadl)
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{
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{
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struct vmbus_channel_gpadl_header *gpadlmsg;
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struct vmbus_channel_gpadl_header *gpadlmsg;
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struct vmbus_channel_gpadl_body *gpadl_body;
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struct vmbus_channel_gpadl_body *gpadl_body;
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@ -474,6 +475,15 @@ static int __vmbus_establish_gpadl(struct vmbus_channel *channel,
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if (ret)
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if (ret)
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return ret;
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return ret;
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ret = set_memory_decrypted((unsigned long)kbuffer,
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PFN_UP(size));
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if (ret) {
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dev_warn(&channel->device_obj->device,
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"Failed to set host visibility for new GPADL %d.\n",
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ret);
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return ret;
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}
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init_completion(&msginfo->waitevent);
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init_completion(&msginfo->waitevent);
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msginfo->waiting_channel = channel;
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msginfo->waiting_channel = channel;
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@ -537,7 +547,10 @@ static int __vmbus_establish_gpadl(struct vmbus_channel *channel,
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}
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}
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/* At this point, we received the gpadl created msg */
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/* At this point, we received the gpadl created msg */
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*gpadl_handle = gpadlmsg->gpadl;
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gpadl->gpadl_handle = gpadlmsg->gpadl;
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gpadl->buffer = kbuffer;
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gpadl->size = size;
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cleanup:
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cleanup:
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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@ -549,6 +562,11 @@ cleanup:
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}
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}
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kfree(msginfo);
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kfree(msginfo);
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if (ret)
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set_memory_encrypted((unsigned long)kbuffer,
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PFN_UP(size));
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return ret;
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return ret;
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}
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}
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@ -561,10 +579,10 @@ cleanup:
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* @gpadl_handle: some funky thing
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* @gpadl_handle: some funky thing
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*/
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*/
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int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer,
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int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer,
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u32 size, u32 *gpadl_handle)
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u32 size, struct vmbus_gpadl *gpadl)
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{
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{
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return __vmbus_establish_gpadl(channel, HV_GPADL_BUFFER, kbuffer, size,
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return __vmbus_establish_gpadl(channel, HV_GPADL_BUFFER, kbuffer, size,
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0U, gpadl_handle);
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0U, gpadl);
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}
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}
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EXPORT_SYMBOL_GPL(vmbus_establish_gpadl);
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EXPORT_SYMBOL_GPL(vmbus_establish_gpadl);
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@ -675,7 +693,7 @@ static int __vmbus_open(struct vmbus_channel *newchannel,
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goto error_clean_ring;
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goto error_clean_ring;
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/* Establish the gpadl for the ring buffer */
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/* Establish the gpadl for the ring buffer */
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newchannel->ringbuffer_gpadlhandle = 0;
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newchannel->ringbuffer_gpadlhandle.gpadl_handle = 0;
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err = __vmbus_establish_gpadl(newchannel, HV_GPADL_RING,
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err = __vmbus_establish_gpadl(newchannel, HV_GPADL_RING,
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page_address(newchannel->ringbuffer_page),
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page_address(newchannel->ringbuffer_page),
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@ -701,7 +719,8 @@ static int __vmbus_open(struct vmbus_channel *newchannel,
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open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL;
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open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL;
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open_msg->openid = newchannel->offermsg.child_relid;
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open_msg->openid = newchannel->offermsg.child_relid;
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open_msg->child_relid = newchannel->offermsg.child_relid;
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open_msg->child_relid = newchannel->offermsg.child_relid;
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open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;
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open_msg->ringbuffer_gpadlhandle
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= newchannel->ringbuffer_gpadlhandle.gpadl_handle;
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/*
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/*
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* The unit of ->downstream_ringbuffer_pageoffset is HV_HYP_PAGE and
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* The unit of ->downstream_ringbuffer_pageoffset is HV_HYP_PAGE and
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* the unit of ->ringbuffer_send_offset (i.e. send_pages) is PAGE, so
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* the unit of ->ringbuffer_send_offset (i.e. send_pages) is PAGE, so
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@ -759,8 +778,7 @@ error_clean_msglist:
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error_free_info:
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error_free_info:
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kfree(open_info);
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kfree(open_info);
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error_free_gpadl:
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error_free_gpadl:
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vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
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vmbus_teardown_gpadl(newchannel, &newchannel->ringbuffer_gpadlhandle);
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newchannel->ringbuffer_gpadlhandle = 0;
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error_clean_ring:
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error_clean_ring:
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hv_ringbuffer_cleanup(&newchannel->outbound);
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hv_ringbuffer_cleanup(&newchannel->outbound);
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hv_ringbuffer_cleanup(&newchannel->inbound);
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hv_ringbuffer_cleanup(&newchannel->inbound);
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@ -806,7 +824,7 @@ EXPORT_SYMBOL_GPL(vmbus_open);
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/*
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/*
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* vmbus_teardown_gpadl -Teardown the specified GPADL handle
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* vmbus_teardown_gpadl -Teardown the specified GPADL handle
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*/
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*/
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int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle)
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int vmbus_teardown_gpadl(struct vmbus_channel *channel, struct vmbus_gpadl *gpadl)
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{
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{
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struct vmbus_channel_gpadl_teardown *msg;
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struct vmbus_channel_gpadl_teardown *msg;
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struct vmbus_channel_msginfo *info;
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struct vmbus_channel_msginfo *info;
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@ -825,7 +843,7 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle)
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msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN;
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msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN;
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msg->child_relid = channel->offermsg.child_relid;
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msg->child_relid = channel->offermsg.child_relid;
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msg->gpadl = gpadl_handle;
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msg->gpadl = gpadl->gpadl_handle;
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
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list_add_tail(&info->msglistentry,
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list_add_tail(&info->msglistentry,
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@ -845,6 +863,8 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle)
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wait_for_completion(&info->waitevent);
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wait_for_completion(&info->waitevent);
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gpadl->gpadl_handle = 0;
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post_msg_err:
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post_msg_err:
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/*
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/*
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* If the channel has been rescinded;
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* If the channel has been rescinded;
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
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kfree(info);
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kfree(info);
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ret = set_memory_encrypted((unsigned long)gpadl->buffer,
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PFN_UP(gpadl->size));
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if (ret)
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pr_warn("Fail to set mem host visibility in GPADL teardown %d.\n", ret);
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return ret;
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return ret;
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}
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}
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EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl);
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EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl);
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@ -933,9 +959,8 @@ static int vmbus_close_internal(struct vmbus_channel *channel)
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}
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}
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/* Tear down the gpadl for the channel's ring buffer */
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/* Tear down the gpadl for the channel's ring buffer */
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else if (channel->ringbuffer_gpadlhandle) {
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else if (channel->ringbuffer_gpadlhandle.gpadl_handle) {
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ret = vmbus_teardown_gpadl(channel,
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ret = vmbus_teardown_gpadl(channel, &channel->ringbuffer_gpadlhandle);
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channel->ringbuffer_gpadlhandle);
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if (ret) {
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if (ret) {
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pr_err("Close failed: teardown gpadl return %d\n", ret);
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pr_err("Close failed: teardown gpadl return %d\n", ret);
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/*
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/*
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@ -943,8 +968,6 @@ static int vmbus_close_internal(struct vmbus_channel *channel)
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* it is perhaps better to leak memory.
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* it is perhaps better to leak memory.
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*/
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*/
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}
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}
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channel->ringbuffer_gpadlhandle = 0;
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}
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}
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if (!ret)
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if (!ret)
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/* Receive buffer allocated by us but manages by NetVSP */
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/* Receive buffer allocated by us but manages by NetVSP */
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void *recv_buf;
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void *recv_buf;
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u32 recv_buf_size; /* allocated bytes */
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u32 recv_buf_size; /* allocated bytes */
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u32 recv_buf_gpadl_handle;
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struct vmbus_gpadl recv_buf_gpadl_handle;
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u32 recv_section_cnt;
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u32 recv_section_cnt;
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u32 recv_section_size;
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u32 recv_section_size;
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u32 recv_completion_cnt;
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u32 recv_completion_cnt;
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/* Send buffer allocated by us */
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/* Send buffer allocated by us */
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void *send_buf;
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void *send_buf;
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u32 send_buf_gpadl_handle;
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u32 send_buf_size;
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struct vmbus_gpadl send_buf_gpadl_handle;
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u32 send_section_cnt;
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u32 send_section_cnt;
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u32 send_section_size;
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u32 send_section_size;
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unsigned long *send_section_map;
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unsigned long *send_section_map;
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@ -278,9 +278,9 @@ static void netvsc_teardown_recv_gpadl(struct hv_device *device,
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{
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{
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int ret;
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int ret;
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if (net_device->recv_buf_gpadl_handle) {
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if (net_device->recv_buf_gpadl_handle.gpadl_handle) {
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ret = vmbus_teardown_gpadl(device->channel,
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ret = vmbus_teardown_gpadl(device->channel,
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net_device->recv_buf_gpadl_handle);
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&net_device->recv_buf_gpadl_handle);
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/* If we failed here, we might as well return and have a leak
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/* If we failed here, we might as well return and have a leak
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* rather than continue and a bugchk
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* rather than continue and a bugchk
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@ -290,7 +290,6 @@ static void netvsc_teardown_recv_gpadl(struct hv_device *device,
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"unable to teardown receive buffer's gpadl\n");
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"unable to teardown receive buffer's gpadl\n");
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return;
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return;
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}
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}
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net_device->recv_buf_gpadl_handle = 0;
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}
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}
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}
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}
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@ -300,9 +299,9 @@ static void netvsc_teardown_send_gpadl(struct hv_device *device,
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{
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{
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int ret;
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int ret;
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if (net_device->send_buf_gpadl_handle) {
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if (net_device->send_buf_gpadl_handle.gpadl_handle) {
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ret = vmbus_teardown_gpadl(device->channel,
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ret = vmbus_teardown_gpadl(device->channel,
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net_device->send_buf_gpadl_handle);
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&net_device->send_buf_gpadl_handle);
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/* If we failed here, we might as well return and have a leak
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/* If we failed here, we might as well return and have a leak
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* rather than continue and a bugchk
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* rather than continue and a bugchk
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"unable to teardown send buffer's gpadl\n");
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"unable to teardown send buffer's gpadl\n");
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return;
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return;
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}
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}
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net_device->send_buf_gpadl_handle = 0;
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}
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}
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}
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}
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@ -380,7 +378,7 @@ static int netvsc_init_buf(struct hv_device *device,
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memset(init_packet, 0, sizeof(struct nvsp_message));
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memset(init_packet, 0, sizeof(struct nvsp_message));
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init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF;
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init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF;
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init_packet->msg.v1_msg.send_recv_buf.
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init_packet->msg.v1_msg.send_recv_buf.
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gpadl_handle = net_device->recv_buf_gpadl_handle;
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gpadl_handle = net_device->recv_buf_gpadl_handle.gpadl_handle;
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init_packet->msg.v1_msg.
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init_packet->msg.v1_msg.
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send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
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send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
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@ -463,6 +461,7 @@ static int netvsc_init_buf(struct hv_device *device,
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ret = -ENOMEM;
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ret = -ENOMEM;
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goto cleanup;
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goto cleanup;
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}
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}
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net_device->send_buf_size = buf_size;
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/* Establish the gpadl handle for this buffer on this
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/* Establish the gpadl handle for this buffer on this
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* channel. Note: This call uses the vmbus connection rather
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* channel. Note: This call uses the vmbus connection rather
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memset(init_packet, 0, sizeof(struct nvsp_message));
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memset(init_packet, 0, sizeof(struct nvsp_message));
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init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF;
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init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF;
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init_packet->msg.v1_msg.send_send_buf.gpadl_handle =
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init_packet->msg.v1_msg.send_send_buf.gpadl_handle =
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net_device->send_buf_gpadl_handle;
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net_device->send_buf_gpadl_handle.gpadl_handle;
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init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID;
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init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID;
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trace_nvsp_send(ndev, init_packet);
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trace_nvsp_send(ndev, init_packet);
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@ -58,11 +58,11 @@ struct hv_uio_private_data {
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atomic_t refcnt;
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atomic_t refcnt;
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void *recv_buf;
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void *recv_buf;
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u32 recv_gpadl;
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struct vmbus_gpadl recv_gpadl;
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char recv_name[32]; /* "recv_4294967295" */
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char recv_name[32]; /* "recv_4294967295" */
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void *send_buf;
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void *send_buf;
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u32 send_gpadl;
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struct vmbus_gpadl send_gpadl;
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char send_name[32];
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char send_name[32];
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};
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};
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@ -179,15 +179,13 @@ hv_uio_new_channel(struct vmbus_channel *new_sc)
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static void
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static void
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hv_uio_cleanup(struct hv_device *dev, struct hv_uio_private_data *pdata)
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hv_uio_cleanup(struct hv_device *dev, struct hv_uio_private_data *pdata)
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{
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{
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if (pdata->send_gpadl) {
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if (pdata->send_gpadl.gpadl_handle) {
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vmbus_teardown_gpadl(dev->channel, pdata->send_gpadl);
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vmbus_teardown_gpadl(dev->channel, &pdata->send_gpadl);
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pdata->send_gpadl = 0;
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vfree(pdata->send_buf);
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vfree(pdata->send_buf);
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}
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}
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if (pdata->recv_gpadl) {
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if (pdata->recv_gpadl.gpadl_handle) {
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vmbus_teardown_gpadl(dev->channel, pdata->recv_gpadl);
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vmbus_teardown_gpadl(dev->channel, &pdata->recv_gpadl);
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pdata->recv_gpadl = 0;
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vfree(pdata->recv_buf);
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vfree(pdata->recv_buf);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
@ -303,7 +301,7 @@ hv_uio_probe(struct hv_device *dev,
|
||||||
|
|
||||||
/* put Global Physical Address Label in name */
|
/* put Global Physical Address Label in name */
|
||||||
snprintf(pdata->recv_name, sizeof(pdata->recv_name),
|
snprintf(pdata->recv_name, sizeof(pdata->recv_name),
|
||||||
"recv:%u", pdata->recv_gpadl);
|
"recv:%u", pdata->recv_gpadl.gpadl_handle);
|
||||||
pdata->info.mem[RECV_BUF_MAP].name = pdata->recv_name;
|
pdata->info.mem[RECV_BUF_MAP].name = pdata->recv_name;
|
||||||
pdata->info.mem[RECV_BUF_MAP].addr
|
pdata->info.mem[RECV_BUF_MAP].addr
|
||||||
= (uintptr_t)pdata->recv_buf;
|
= (uintptr_t)pdata->recv_buf;
|
||||||
|
@ -324,7 +322,7 @@ hv_uio_probe(struct hv_device *dev,
|
||||||
}
|
}
|
||||||
|
|
||||||
snprintf(pdata->send_name, sizeof(pdata->send_name),
|
snprintf(pdata->send_name, sizeof(pdata->send_name),
|
||||||
"send:%u", pdata->send_gpadl);
|
"send:%u", pdata->send_gpadl.gpadl_handle);
|
||||||
pdata->info.mem[SEND_BUF_MAP].name = pdata->send_name;
|
pdata->info.mem[SEND_BUF_MAP].name = pdata->send_name;
|
||||||
pdata->info.mem[SEND_BUF_MAP].addr
|
pdata->info.mem[SEND_BUF_MAP].addr
|
||||||
= (uintptr_t)pdata->send_buf;
|
= (uintptr_t)pdata->send_buf;
|
||||||
|
|
|
@ -803,6 +803,12 @@ struct vmbus_device {
|
||||||
|
|
||||||
#define VMBUS_DEFAULT_MAX_PKT_SIZE 4096
|
#define VMBUS_DEFAULT_MAX_PKT_SIZE 4096
|
||||||
|
|
||||||
|
struct vmbus_gpadl {
|
||||||
|
u32 gpadl_handle;
|
||||||
|
u32 size;
|
||||||
|
void *buffer;
|
||||||
|
};
|
||||||
|
|
||||||
struct vmbus_channel {
|
struct vmbus_channel {
|
||||||
struct list_head listentry;
|
struct list_head listentry;
|
||||||
|
|
||||||
|
@ -822,7 +828,7 @@ struct vmbus_channel {
|
||||||
bool rescind_ref; /* got rescind msg, got channel reference */
|
bool rescind_ref; /* got rescind msg, got channel reference */
|
||||||
struct completion rescind_event;
|
struct completion rescind_event;
|
||||||
|
|
||||||
u32 ringbuffer_gpadlhandle;
|
struct vmbus_gpadl ringbuffer_gpadlhandle;
|
||||||
|
|
||||||
/* Allocated memory for ring buffer */
|
/* Allocated memory for ring buffer */
|
||||||
struct page *ringbuffer_page;
|
struct page *ringbuffer_page;
|
||||||
|
@ -1192,10 +1198,10 @@ extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
|
||||||
extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
|
extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
|
||||||
void *kbuffer,
|
void *kbuffer,
|
||||||
u32 size,
|
u32 size,
|
||||||
u32 *gpadl_handle);
|
struct vmbus_gpadl *gpadl);
|
||||||
|
|
||||||
extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
|
extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
|
||||||
u32 gpadl_handle);
|
struct vmbus_gpadl *gpadl);
|
||||||
|
|
||||||
void vmbus_reset_channel_cb(struct vmbus_channel *channel);
|
void vmbus_reset_channel_cb(struct vmbus_channel *channel);
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue