sync comments, fix function header, rename variable name to follow coding style.

[mirror_edk2.git] / MdeModulePkg / Universal / Network / SnpDxe / Get_status.c

diff --git a/MdeModulePkg/Universal/Network/SnpDxe/Get_status.c b/MdeModulePkg/Universal/Network/SnpDxe/Get_status.c
index 9eaafb932c522356a0d7d5e0643ada947e374093..17078c81cfc9339e330d84289990d9e1587ac806 100644 (file)
--- a/MdeModulePkg/Universal/Network/SnpDxe/Get_status.c
+++ b/MdeModulePkg/Universal/Network/SnpDxe/Get_status.c
@@ -1,21 +1,16 @@
 /** @file\r
 /** @file\r

-Copyright (c) 2004 - 2007, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
-are licensed and made available under the terms and conditions of the BSD License\r
-which accompanies this distribution.  The full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php\r
+               Implementation of reading the current interrupt status and recycled transmit\r
+         buffer status from a network interface.\r
+\r
+Copyright (c) 2004 - 2007, Intel Corporation. <BR> \r
+All rights reserved. This program and the accompanying materials are licensed \r
+and made available under the terms and conditions of the BSD License which \r
+accompanies this distribution. The full text of the license may be found at \r
+http://opensource.org/licenses/bsd-license.php \r

 \r
 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
 \r
 \r
 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
 \r

-Module name:\r
-  get_status.c\r
-\r
-Abstract:\r
-\r
-Revision history:\r
-  2000-Feb-03 M(f)J   Genesis.\r
-\r

 **/\r
 \r
 #include "Snp.h"\r
 **/\r
 \r
 #include "Snp.h"\r


@@ -24,7 +19,7 @@ Revision history:
   this routine calls undi to get the status of the interrupts, get the list of\r
   transmit buffers that completed transmitting!\r
 \r
   this routine calls undi to get the status of the interrupts, get the list of\r
   transmit buffers that completed transmitting!\r
 \r

-  @param  snp                     pointer to snp driver structure\r
+  @param  Snp                     pointer to snp driver structure\r

   @param  InterruptStatusPtr      a non null pointer gets the interrupt status\r
   @param  TransmitBufferListPtrs  a non null ointer gets the list of pointers of\r
                                   previously  transmitted buffers whose\r
   @param  InterruptStatusPtr      a non null pointer gets the interrupt status\r
   @param  TransmitBufferListPtrs  a non null ointer gets the list of pointers of\r
                                   previously  transmitted buffers whose\r


@@ -33,56 +28,56 @@ Revision history:
 \r
 **/\r
 EFI_STATUS\r
 \r
 **/\r
 EFI_STATUS\r

-pxe_getstatus (\r
-  SNP_DRIVER *snp,\r
+PxeGetStatus (\r
+  SNP_DRIVER *Snp,\r

   UINT32     *InterruptStatusPtr,\r
   VOID       **TransmitBufferListPtr\r
   )\r
 {\r
   UINT32     *InterruptStatusPtr,\r
   VOID       **TransmitBufferListPtr\r
   )\r
 {\r

-  PXE_DB_GET_STATUS *db;\r
+  PXE_DB_GET_STATUS *Db;\r

   UINT16            InterruptFlags;\r
 \r
   UINT16            InterruptFlags;\r
 \r

-  db                = snp->db;\r
-  snp->cdb.OpCode   = PXE_OPCODE_GET_STATUS;\r
+  Db                = Snp->Db;\r
+  Snp->Cdb.OpCode   = PXE_OPCODE_GET_STATUS;\r

 \r
 \r

-  snp->cdb.OpFlags  = 0;\r
+  Snp->Cdb.OpFlags  = 0;\r

 \r
   if (TransmitBufferListPtr != NULL) {\r
 \r
   if (TransmitBufferListPtr != NULL) {\r

-    snp->cdb.OpFlags |= PXE_OPFLAGS_GET_TRANSMITTED_BUFFERS;\r
+    Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_TRANSMITTED_BUFFERS;\r

   }\r
 \r
   if (InterruptStatusPtr != NULL) {\r
   }\r
 \r
   if (InterruptStatusPtr != NULL) {\r

-    snp->cdb.OpFlags |= PXE_OPFLAGS_GET_INTERRUPT_STATUS;\r
+    Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_INTERRUPT_STATUS;\r

   }\r
 \r
   }\r
 \r

-  snp->cdb.CPBsize  = PXE_CPBSIZE_NOT_USED;\r
-  snp->cdb.CPBaddr  = PXE_CPBADDR_NOT_USED;\r
+  Snp->Cdb.CPBsize  = PXE_CPBSIZE_NOT_USED;\r
+  Snp->Cdb.CPBaddr  = PXE_CPBADDR_NOT_USED;\r

 \r
   //\r
   // size DB for return of one buffer\r
   //\r
 \r
   //\r
   // size DB for return of one buffer\r
   //\r

-  snp->cdb.DBsize = (UINT16) (((UINT16) (sizeof (PXE_DB_GET_STATUS)) - (UINT16) (sizeof db->TxBuffer)) + (UINT16) (sizeof db->TxBuffer[0]));\r
+  Snp->Cdb.DBsize     = (UINT16) ((sizeof (PXE_DB_GET_STATUS) - sizeof (Db->TxBuffer)) + sizeof (Db->TxBuffer[0]));\r

 \r
 \r

-  snp->cdb.DBaddr     = (UINT64)(UINTN) db;\r
+  Snp->Cdb.DBaddr     = (UINT64)(UINTN) Db;\r

 \r
 \r

-  snp->cdb.StatCode   = PXE_STATCODE_INITIALIZE;\r
-  snp->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;\r
-  snp->cdb.IFnum      = snp->if_num;\r
-  snp->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;\r
+  Snp->Cdb.StatCode   = PXE_STATCODE_INITIALIZE;\r
+  Snp->Cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;\r
+  Snp->Cdb.IFnum      = Snp->IfNum;\r
+  Snp->Cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;\r

 \r
   //\r
   // Issue UNDI command and check result.\r
   //\r
 \r
   //\r
   // Issue UNDI command and check result.\r
   //\r

-  DEBUG ((EFI_D_NET, "\nsnp->undi.get_status()  "));\r
+  DEBUG ((EFI_D_NET, "\nSnp->undi.get_status()  "));\r

 \r
 \r

-  (*snp->issue_undi32_command) ((UINT64)(UINTN) &snp->cdb);\r
+  (*Snp->IssueUndi32Command) ((UINT64)(UINTN) &Snp->Cdb);\r

 \r
 \r

-  if (snp->cdb.StatCode != EFI_SUCCESS) {\r
+  if (Snp->Cdb.StatCode != EFI_SUCCESS) {\r

     DEBUG (\r
       (EFI_D_NET,\r
     DEBUG (\r
       (EFI_D_NET,\r

-      "\nsnp->undi.get_status()  %xh:%xh\n",\r
-      snp->cdb.StatFlags,\r
-      snp->cdb.StatFlags)\r
+      "\nSnp->undi.get_status()  %xh:%xh\n",\r
+      Snp->Cdb.StatFlags,\r
+      Snp->Cdb.StatFlags)\r

       );\r
 \r
     return EFI_DEVICE_ERROR;\r
       );\r
 \r
     return EFI_DEVICE_ERROR;\r


@@ -91,23 +86,23 @@ pxe_getstatus (
   // report the values back..\r
   //\r
   if (InterruptStatusPtr != NULL) {\r
   // report the values back..\r
   //\r
   if (InterruptStatusPtr != NULL) {\r

-    InterruptFlags      = (UINT16) (snp->cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_INTERRUPT_MASK);\r
+    InterruptFlags      = (UINT16) (Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_INTERRUPT_MASK);\r

 \r
     *InterruptStatusPtr = 0;\r
 \r
 \r
     *InterruptStatusPtr = 0;\r
 \r

-    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_RECEIVE) {\r
+    if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_RECEIVE) == PXE_STATFLAGS_GET_STATUS_RECEIVE) {\r

       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;\r
     }\r
 \r
       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;\r
     }\r
 \r

-    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_TRANSMIT) {\r
+    if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_TRANSMIT) == PXE_STATFLAGS_GET_STATUS_TRANSMIT) {\r

       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;\r
     }\r
 \r
       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;\r
     }\r
 \r

-    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_COMMAND) {\r
+    if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_COMMAND) == PXE_STATFLAGS_GET_STATUS_COMMAND) {\r

       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;\r
     }\r
 \r
       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;\r
     }\r
 \r

-    if (InterruptFlags & PXE_STATFLAGS_GET_STATUS_SOFTWARE) {\r
+    if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_SOFTWARE) == PXE_STATFLAGS_GET_STATUS_SOFTWARE) {\r

       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;\r
     }\r
 \r
       *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;\r
     }\r
 \r


@@ -116,58 +111,82 @@ pxe_getstatus (
   if (TransmitBufferListPtr != NULL) {\r
     *TransmitBufferListPtr =\r
       (\r
   if (TransmitBufferListPtr != NULL) {\r
     *TransmitBufferListPtr =\r
       (\r

-        (snp->cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN) ||\r
-        (snp->cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_TXBUF_QUEUE_EMPTY)\r
-      ) ? 0 : (VOID *) (UINTN) db->TxBuffer[0];\r
+        (Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN) ||\r
+        (Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_TXBUF_QUEUE_EMPTY)\r
+      ) ? 0 : (VOID *) (UINTN) Db->TxBuffer[0];\r

 \r
   }\r
 \r
   return EFI_SUCCESS;\r
 }\r
 \r
 \r
   }\r
 \r
   return EFI_SUCCESS;\r
 }\r
 \r

-\r

 /**\r
 /**\r

-  This is the SNP interface routine for getting the status\r
-  This routine basically retrieves snp structure, checks the SNP state and\r
-  calls the pxe_getstatus routine to actually get the undi status\r
-\r
-  @param  this                    context pointer\r
-  @param  InterruptStatusPtr      a non null pointer gets the interrupt status\r
-  @param  TransmitBufferListPtrs  a non null ointer gets the list of pointers of\r
-                                  previously  transmitted buffers whose\r
-                                  transmission was completed  asynchrnously.\r
-\r
+  Reads the current interrupt status and recycled transmit buffer status from a\r
+  network interface.\r
+  \r
+  This function gets the current interrupt and recycled transmit buffer status \r
+  from the network interface. The interrupt status is returned as a bit mask in\r
+  InterruptStatus. If InterruptStatus is NULL, the interrupt status will not be\r
+  read. If TxBuf is not NULL, a recycled transmit buffer address will be retrieved.\r
+  If a recycled transmit buffer address is returned in TxBuf, then the buffer has\r
+  been successfully transmitted, and the status for that buffer is cleared. If\r
+  the status of the network interface is successfully collected, EFI_SUCCESS \r
+  will be returned. If the driver has not been initialized, EFI_DEVICE_ERROR will\r
+  be returned.\r
+\r
+  @param This            A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.\r
+  @param InterruptStatus A pointer to the bit mask of the currently active \r
+                         interrupts (see "Related Definitions"). If this is NULL,\r
+                         the interrupt status will not be read from the device.\r
+                         If this is not NULL, the interrupt status will be read\r
+                         from the device. When the interrupt status is read, it \r
+                         will also be cleared. Clearing the transmit interrupt does \r
+                         not empty the recycled transmit buffer array.\r
+  @param TxBuf           Recycled transmit buffer address. The network interface\r
+                         will not transmit if its internal recycled transmit \r
+                         buffer array is full. Reading the transmit buffer does\r
+                         not clear the transmit interrupt. If this is NULL, then\r
+                         the transmit buffer status will not be read. If there \r
+                         are no transmit buffers to recycle and TxBuf is not NULL, \r
+                         TxBuf will be set to NULL.\r
+\r
+  @retval EFI_SUCCESS           The status of the network interface was retrieved.\r
+  @retval EFI_NOT_STARTED       The network interface has not been started.\r
+  @retval EFI_INVALID_PARAMETER This parameter was NULL or did not point to a valid \r
+                                EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
+  @retval EFI_DEVICE_ERROR      The command could not be sent to the network \r
+                                interface.\r

 \r
 **/\r
 EFI_STATUS\r
 EFIAPI\r
 \r
 **/\r
 EFI_STATUS\r
 EFIAPI\r

-snp_undi32_get_status (\r
-  IN EFI_SIMPLE_NETWORK_PROTOCOL * this,\r
-  OUT UINT32                     *InterruptStatusPtr OPTIONAL,\r
-  OUT VOID                       **TransmitBufferListPtr OPTIONAL\r
+SnpUndi32GetStatus (\r
+  IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r
+  OUT UINT32                     *InterruptStatus, OPTIONAL\r
+  OUT VOID                       **TxBuf           OPTIONAL\r

   )\r
 {\r
   )\r
 {\r

-  SNP_DRIVER  *snp;\r
+  SNP_DRIVER  *Snp;\r

   EFI_TPL     OldTpl;\r
   EFI_STATUS  Status;\r
 \r
   EFI_TPL     OldTpl;\r
   EFI_STATUS  Status;\r
 \r

-  if (this == NULL) {\r
+  if (This == NULL) {\r

     return EFI_INVALID_PARAMETER;\r
   }\r
 \r
     return EFI_INVALID_PARAMETER;\r
   }\r
 \r

-  if (InterruptStatusPtr == NULL && TransmitBufferListPtr == NULL) {\r
+  if (InterruptStatus == NULL && TxBuf == NULL) {\r

     return EFI_INVALID_PARAMETER;\r
   }\r
 \r
     return EFI_INVALID_PARAMETER;\r
   }\r
 \r

-  snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);\r
+  Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);\r

 \r
   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
 \r
 \r
   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
 \r

-  if (snp == NULL) {\r
+  if (Snp == NULL) {\r

     return EFI_DEVICE_ERROR;\r
   }\r
 \r
     return EFI_DEVICE_ERROR;\r
   }\r
 \r

-  switch (snp->mode.State) {\r
+  switch (Snp->Mode.State) {\r

   case EfiSimpleNetworkInitialized:\r
     break;\r
 \r
   case EfiSimpleNetworkInitialized:\r
     break;\r
 \r


@@ -180,7 +199,7 @@ snp_undi32_get_status (
     goto ON_EXIT;\r
   }\r
 \r
     goto ON_EXIT;\r
   }\r
 \r

-  Status = pxe_getstatus (snp, InterruptStatusPtr, TransmitBufferListPtr);\r
+  Status = PxeGetStatus (Snp, InterruptStatus, TxBuf);\r

 \r
 ON_EXIT:\r
   gBS->RestoreTPL (OldTpl);\r
 \r
 ON_EXIT:\r
   gBS->RestoreTPL (OldTpl);\r