mirror of https://github.com/acidanthera/audk.git
140 lines
4.8 KiB
C
140 lines
4.8 KiB
C
/** @file
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Device Abstraction: device creation utility functions.
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Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <Library/BaseLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <LibConfig.h>
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#include <errno.h>
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#include <sys/poll.h>
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#include <kfile.h>
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#include <Device/Device.h>
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#include <MainData.h>
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LIST_ENTRY daDeviceList = INITIALIZE_LIST_HEAD_VARIABLE(daDeviceList);
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DeviceNode *daDefaultDevice = NULL; ///< Device to use if nothing else found
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DeviceNode *daRootDevice = NULL; ///< Device containing the root file system
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DeviceNode *daCurrentDevice = NULL; ///< Device currently being accessed
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/* Commonly used fileops
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fnullop_* Does nothing and returns success.
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fbadop_* Does nothing and returns EPERM
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*/
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int EFIAPI fnullop_fcntl (struct __filedes *filp, UINT32 Cmd, void *p3, void *p4)
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{ return 0; }
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short EFIAPI fnullop_poll (struct __filedes *filp, short Events)
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{
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return ((POLLIN | POLLRDNORM | POLLOUT) & Events);
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}
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int EFIAPI fnullop_flush (struct __filedes *filp)
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{ return 0; }
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int EFIAPI fbadop_stat (struct __filedes *filp, struct stat *StatBuf, void *Buf)
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{ return -EPERM; }
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int EFIAPI fbadop_ioctl (struct __filedes *filp, ULONGN Cmd, void *argp)
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{ return -EPERM; }
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int EFIAPI fbadop_delete (struct __filedes *filp)
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{ return -EPERM; }
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int EFIAPI fbadop_mkdir (const char *path, __mode_t perms)
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{ return -EPERM; }
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int EFIAPI fbadop_rename (const char *from, const char *to)
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{ return -EPERM; }
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int EFIAPI fbadop_rmdir (struct __filedes *filp)
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{ return -EPERM; }
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/** Add a new device to the device list.
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If both DevName and DevProto are NULL, register this as the Default device.
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@param DevName Name of the device to add.
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@param DevProto Pointer to the GUID identifying the protocol associated with this device.
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If DevProto is NULL, startup code will not try to find instances
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of this device.
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@param OpenFunc Pointer to the device's Open function.
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@param InstanceList Optional pointer to the device's initialized instance list.
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If InstanceList is NULL, the application startup code will
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scan for instances of the protocol identified by DevProto and
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populate the InstanceList in the order those protocols are found.
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@param NumInstance Number of instances in InstanceList.
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@param Modes Bit-mapped flags indicating operations (R, W, RW, ...) permitted to this device.
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**/
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DeviceNode *
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EFIAPI
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__DevRegister(
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IN const CHAR16 *DevName,
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IN GUID *DevProto,
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IN FO_OPEN OpenFunc,
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IN void *InstanceList,
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IN int NumInstance,
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IN UINT32 InstanceSize,
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IN UINT32 Modes
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)
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{
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DeviceNode *Node;
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GenericInstance *GIp;
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char *GenPtr;
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int i;
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/* Validate parameters */
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if(((DevName == NULL) && (DevProto != NULL)) ||
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(OpenFunc == NULL)) {
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EFIerrno = RETURN_INVALID_PARAMETER;
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return NULL;
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}
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Node = (DeviceNode *)AllocateZeroPool(sizeof(DeviceNode));
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if(Node == NULL) {
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EFIerrno = RETURN_OUT_OF_RESOURCES;
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return NULL;
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}
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Node->DevName = DevName;
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Node->DevProto = DevProto;
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Node->InstanceList = InstanceList;
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Node->OpenFunc = OpenFunc;
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Node->InstanceSize = InstanceSize;
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Node->NumInstances = NumInstance;
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Node->OpModes = Modes;
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/* Update the Parent member of each element of the InstanceList */
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if(InstanceList != NULL) {
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GenPtr = InstanceList;
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for(i = 0; i < NumInstance; ++i) { // Iterate through each element of InstanceList
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GIp = (GenericInstance *)GenPtr;
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GIp->Parent = Node; // Initializing the Parent member & InstanceNum
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//GIp->InstanceNum = i;
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GenPtr += InstanceSize;
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}
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}
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if(DevName == NULL) {
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if(daDefaultDevice != NULL) {
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EFIerrno = RETURN_INVALID_PARAMETER;
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return NULL;
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}
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daDefaultDevice = Node;
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}
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else {
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(void) InsertTailList(&daDeviceList, &Node->DevList);
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}
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EFIerrno = RETURN_SUCCESS;
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return Node;
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}
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