From: Boqun Feng <boqun.feng@gmail.com>
To: linux-hyperv@vger.kernel.org, linux-input@vger.kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
linux-scsi@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Jiri Kosina <jikos@kernel.org>,
Benjamin Tissoires <benjamin.tissoires@redhat.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Michael Kelley <mikelley@microsoft.com>,
will@kernel.org, ardb@kernel.org, arnd@arndb.de,
catalin.marinas@arm.com, mark.rutland@arm.com, maz@kernel.org,
Boqun Feng <boqun.feng@gmail.com>
Subject: [PATCH v3 02/11] Drivers: hv: vmbus: Move __vmbus_open()
Date: Thu, 10 Sep 2020 22:34:46 +0800 [thread overview]
Message-ID: <20200910143455.109293-3-boqun.feng@gmail.com> (raw)
In-Reply-To: <20200910143455.109293-1-boqun.feng@gmail.com>
Pure function movement, no functional changes. The move is made, because
in a later change, __vmbus_open() will rely on some static functions
afterwards, so we separate the move and the modification of
__vmbus_open() in two patches to make it easy to review.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
---
drivers/hv/channel.c | 309 ++++++++++++++++++++++---------------------
1 file changed, 155 insertions(+), 154 deletions(-)
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 4d0f8e5a88d6..1cbe8fc931fc 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -109,160 +109,6 @@ int vmbus_alloc_ring(struct vmbus_channel *newchannel,
}
EXPORT_SYMBOL_GPL(vmbus_alloc_ring);
-static int __vmbus_open(struct vmbus_channel *newchannel,
- void *userdata, u32 userdatalen,
- void (*onchannelcallback)(void *context), void *context)
-{
- struct vmbus_channel_open_channel *open_msg;
- struct vmbus_channel_msginfo *open_info = NULL;
- struct page *page = newchannel->ringbuffer_page;
- u32 send_pages, recv_pages;
- unsigned long flags;
- int err;
-
- if (userdatalen > MAX_USER_DEFINED_BYTES)
- return -EINVAL;
-
- send_pages = newchannel->ringbuffer_send_offset;
- recv_pages = newchannel->ringbuffer_pagecount - send_pages;
-
- if (newchannel->state != CHANNEL_OPEN_STATE)
- return -EINVAL;
-
- newchannel->state = CHANNEL_OPENING_STATE;
- newchannel->onchannel_callback = onchannelcallback;
- newchannel->channel_callback_context = context;
-
- err = hv_ringbuffer_init(&newchannel->outbound, page, send_pages);
- if (err)
- goto error_clean_ring;
-
- err = hv_ringbuffer_init(&newchannel->inbound,
- &page[send_pages], recv_pages);
- if (err)
- goto error_clean_ring;
-
- /* Establish the gpadl for the ring buffer */
- newchannel->ringbuffer_gpadlhandle = 0;
-
- err = vmbus_establish_gpadl(newchannel,
- page_address(newchannel->ringbuffer_page),
- (send_pages + recv_pages) << PAGE_SHIFT,
- &newchannel->ringbuffer_gpadlhandle);
- if (err)
- goto error_clean_ring;
-
- /* Create and init the channel open message */
- open_info = kmalloc(sizeof(*open_info) +
- sizeof(struct vmbus_channel_open_channel),
- GFP_KERNEL);
- if (!open_info) {
- err = -ENOMEM;
- goto error_free_gpadl;
- }
-
- init_completion(&open_info->waitevent);
- open_info->waiting_channel = newchannel;
-
- open_msg = (struct vmbus_channel_open_channel *)open_info->msg;
- open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL;
- open_msg->openid = newchannel->offermsg.child_relid;
- open_msg->child_relid = newchannel->offermsg.child_relid;
- open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;
- open_msg->downstream_ringbuffer_pageoffset = newchannel->ringbuffer_send_offset;
- open_msg->target_vp = hv_cpu_number_to_vp_number(newchannel->target_cpu);
-
- if (userdatalen)
- memcpy(open_msg->userdata, userdata, userdatalen);
-
- spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
- list_add_tail(&open_info->msglistentry,
- &vmbus_connection.chn_msg_list);
- spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
-
- if (newchannel->rescind) {
- err = -ENODEV;
- goto error_free_info;
- }
-
- err = vmbus_post_msg(open_msg,
- sizeof(struct vmbus_channel_open_channel), true);
-
- trace_vmbus_open(open_msg, err);
-
- if (err != 0)
- goto error_clean_msglist;
-
- wait_for_completion(&open_info->waitevent);
-
- spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
- list_del(&open_info->msglistentry);
- spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
-
- if (newchannel->rescind) {
- err = -ENODEV;
- goto error_free_info;
- }
-
- if (open_info->response.open_result.status) {
- err = -EAGAIN;
- goto error_free_info;
- }
-
- newchannel->state = CHANNEL_OPENED_STATE;
- kfree(open_info);
- return 0;
-
-error_clean_msglist:
- spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
- list_del(&open_info->msglistentry);
- spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
-error_free_info:
- kfree(open_info);
-error_free_gpadl:
- vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
- newchannel->ringbuffer_gpadlhandle = 0;
-error_clean_ring:
- hv_ringbuffer_cleanup(&newchannel->outbound);
- hv_ringbuffer_cleanup(&newchannel->inbound);
- newchannel->state = CHANNEL_OPEN_STATE;
- return err;
-}
-
-/*
- * vmbus_connect_ring - Open the channel but reuse ring buffer
- */
-int vmbus_connect_ring(struct vmbus_channel *newchannel,
- void (*onchannelcallback)(void *context), void *context)
-{
- return __vmbus_open(newchannel, NULL, 0, onchannelcallback, context);
-}
-EXPORT_SYMBOL_GPL(vmbus_connect_ring);
-
-/*
- * vmbus_open - Open the specified channel.
- */
-int vmbus_open(struct vmbus_channel *newchannel,
- u32 send_ringbuffer_size, u32 recv_ringbuffer_size,
- void *userdata, u32 userdatalen,
- void (*onchannelcallback)(void *context), void *context)
-{
- int err;
-
- err = vmbus_alloc_ring(newchannel, send_ringbuffer_size,
- recv_ringbuffer_size);
- if (err)
- return err;
-
- err = __vmbus_open(newchannel, userdata, userdatalen,
- onchannelcallback, context);
- if (err)
- vmbus_free_ring(newchannel);
-
- return err;
-}
-EXPORT_SYMBOL_GPL(vmbus_open);
-
/* Used for Hyper-V Socket: a guest client's connect() to the host */
int vmbus_send_tl_connect_request(const guid_t *shv_guest_servie_id,
const guid_t *shv_host_servie_id)
@@ -556,6 +402,161 @@ int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer,
}
EXPORT_SYMBOL_GPL(vmbus_establish_gpadl);
+static int __vmbus_open(struct vmbus_channel *newchannel,
+ void *userdata, u32 userdatalen,
+ void (*onchannelcallback)(void *context), void *context)
+{
+ struct vmbus_channel_open_channel *open_msg;
+ struct vmbus_channel_msginfo *open_info = NULL;
+ struct page *page = newchannel->ringbuffer_page;
+ u32 send_pages, recv_pages;
+ unsigned long flags;
+ int err;
+
+ if (userdatalen > MAX_USER_DEFINED_BYTES)
+ return -EINVAL;
+
+ send_pages = newchannel->ringbuffer_send_offset;
+ recv_pages = newchannel->ringbuffer_pagecount - send_pages;
+
+ if (newchannel->state != CHANNEL_OPEN_STATE)
+ return -EINVAL;
+
+ newchannel->state = CHANNEL_OPENING_STATE;
+ newchannel->onchannel_callback = onchannelcallback;
+ newchannel->channel_callback_context = context;
+
+ err = hv_ringbuffer_init(&newchannel->outbound, page, send_pages);
+ if (err)
+ goto error_clean_ring;
+
+ err = hv_ringbuffer_init(&newchannel->inbound,
+ &page[send_pages], recv_pages);
+ if (err)
+ goto error_clean_ring;
+
+ /* Establish the gpadl for the ring buffer */
+ newchannel->ringbuffer_gpadlhandle = 0;
+
+ err = vmbus_establish_gpadl(newchannel,
+ page_address(newchannel->ringbuffer_page),
+ (send_pages + recv_pages) << PAGE_SHIFT,
+ &newchannel->ringbuffer_gpadlhandle);
+ if (err)
+ goto error_clean_ring;
+
+ /* Create and init the channel open message */
+ open_info = kmalloc(sizeof(*open_info) +
+ sizeof(struct vmbus_channel_open_channel),
+ GFP_KERNEL);
+ if (!open_info) {
+ err = -ENOMEM;
+ goto error_free_gpadl;
+ }
+
+ init_completion(&open_info->waitevent);
+ open_info->waiting_channel = newchannel;
+
+ open_msg = (struct vmbus_channel_open_channel *)open_info->msg;
+ open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL;
+ open_msg->openid = newchannel->offermsg.child_relid;
+ open_msg->child_relid = newchannel->offermsg.child_relid;
+ open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;
+ open_msg->downstream_ringbuffer_pageoffset = newchannel->ringbuffer_send_offset;
+ open_msg->target_vp = hv_cpu_number_to_vp_number(newchannel->target_cpu);
+
+ if (userdatalen)
+ memcpy(open_msg->userdata, userdata, userdatalen);
+
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
+ list_add_tail(&open_info->msglistentry,
+ &vmbus_connection.chn_msg_list);
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+
+ if (newchannel->rescind) {
+ err = -ENODEV;
+ goto error_free_info;
+ }
+
+ err = vmbus_post_msg(open_msg,
+ sizeof(struct vmbus_channel_open_channel), true);
+
+ trace_vmbus_open(open_msg, err);
+
+ if (err != 0)
+ goto error_clean_msglist;
+
+ wait_for_completion(&open_info->waitevent);
+
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
+ list_del(&open_info->msglistentry);
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+
+ if (newchannel->rescind) {
+ err = -ENODEV;
+ goto error_free_info;
+ }
+
+ if (open_info->response.open_result.status) {
+ err = -EAGAIN;
+ goto error_free_info;
+ }
+
+ newchannel->state = CHANNEL_OPENED_STATE;
+ kfree(open_info);
+ return 0;
+
+error_clean_msglist:
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
+ list_del(&open_info->msglistentry);
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+error_free_info:
+ kfree(open_info);
+error_free_gpadl:
+ vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle);
+ newchannel->ringbuffer_gpadlhandle = 0;
+error_clean_ring:
+ hv_ringbuffer_cleanup(&newchannel->outbound);
+ hv_ringbuffer_cleanup(&newchannel->inbound);
+ newchannel->state = CHANNEL_OPEN_STATE;
+ return err;
+}
+
+/*
+ * vmbus_connect_ring - Open the channel but reuse ring buffer
+ */
+int vmbus_connect_ring(struct vmbus_channel *newchannel,
+ void (*onchannelcallback)(void *context), void *context)
+{
+ return __vmbus_open(newchannel, NULL, 0, onchannelcallback, context);
+}
+EXPORT_SYMBOL_GPL(vmbus_connect_ring);
+
+/*
+ * vmbus_open - Open the specified channel.
+ */
+int vmbus_open(struct vmbus_channel *newchannel,
+ u32 send_ringbuffer_size, u32 recv_ringbuffer_size,
+ void *userdata, u32 userdatalen,
+ void (*onchannelcallback)(void *context), void *context)
+{
+ int err;
+
+ err = vmbus_alloc_ring(newchannel, send_ringbuffer_size,
+ recv_ringbuffer_size);
+ if (err)
+ return err;
+
+ err = __vmbus_open(newchannel, userdata, userdatalen,
+ onchannelcallback, context);
+ if (err)
+ vmbus_free_ring(newchannel);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(vmbus_open);
+
+
/*
* vmbus_teardown_gpadl -Teardown the specified GPADL handle
*/
--
2.28.0
next prev parent reply other threads:[~2020-09-10 21:07 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 14:34 [PATCH v3 00/11] Hyper-V: Support PAGE_SIZE larger than 4K Boqun Feng
2020-09-10 14:34 ` [PATCH v3 01/11] Drivers: hv: vmbus: Always use HV_HYP_PAGE_SIZE for gpadl Boqun Feng
2020-09-12 19:23 ` Michael Kelley
2020-09-10 14:34 ` Boqun Feng [this message]
2020-09-12 19:24 ` [PATCH v3 02/11] Drivers: hv: vmbus: Move __vmbus_open() Michael Kelley
2020-09-10 14:34 ` [PATCH v3 03/11] Drivers: hv: vmbus: Introduce types of GPADL Boqun Feng
2020-09-12 19:29 ` Michael Kelley
2020-09-10 14:34 ` [PATCH v3 04/11] Drivers: hv: Use HV_HYP_PAGE in hv_synic_enable_regs() Boqun Feng
2020-09-12 19:30 ` Michael Kelley
2020-09-10 14:34 ` [PATCH v3 05/11] Drivers: hv: vmbus: Move virt_to_hvpfn() to hyperv header Boqun Feng
2020-09-12 19:32 ` Michael Kelley
2020-09-10 14:34 ` [PATCH v3 06/11] hv: hyperv.h: Introduce some hvpfn helper functions Boqun Feng
2020-09-12 19:33 ` Michael Kelley
2020-09-10 14:34 ` [PATCH v3 07/11] hv_netvsc: Use HV_HYP_PAGE_SIZE for Hyper-V communication Boqun Feng
2020-09-12 19:36 ` Michael Kelley
2020-09-10 14:34 ` [PATCH v3 08/11] Input: hyperv-keyboard: Make ringbuffer at least take two pages Boqun Feng
2020-09-12 19:37 ` Michael Kelley
2020-09-13 16:59 ` Dmitry Torokhov
2020-09-14 8:46 ` Boqun Feng
2020-09-14 9:30 ` Wei Liu
2020-09-14 10:22 ` Boqun Feng
2020-09-10 14:34 ` [PATCH v3 09/11] HID: hyperv: " Boqun Feng
2020-09-12 19:38 ` Michael Kelley
2020-09-10 14:34 ` [PATCH v3 10/11] Driver: hv: util: " Boqun Feng
2020-09-12 19:40 ` Michael Kelley
2020-09-10 14:34 ` [PATCH v3 11/11] scsi: storvsc: Support PAGE_SIZE larger than 4K Boqun Feng
2020-09-12 19:55 ` Michael Kelley
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