blob: 82fb695e76967fb099bd820feb421f53bbc54133 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Bus/USB/USBTransfer.h>
#include <Kernel/Memory/MemoryManager.h>
namespace Kernel::USB {
RefPtr<Transfer> Transfer::try_create(Pipe& pipe, u16 len)
{
auto vmobject = Memory::AnonymousVMObject::try_create_physically_contiguous_with_size(PAGE_SIZE);
if (!vmobject)
return nullptr;
return AK::try_create<Transfer>(pipe, len, *vmobject);
}
Transfer::Transfer(Pipe& pipe, u16 len, Memory::AnonymousVMObject& vmobject)
: m_pipe(pipe)
, m_transfer_data_size(len)
{
// Initialize data buffer for transfer
// This will definitely need to be refactored in the future, I doubt this will scale well...
m_data_buffer = MM.allocate_kernel_region_with_vmobject(vmobject, PAGE_SIZE, "USB Transfer Buffer", Memory::Region::Access::ReadWrite);
}
Transfer::~Transfer()
{
}
void Transfer::set_setup_packet(const USBRequestData& request)
{
// Kind of a nasty hack... Because the kernel isn't in the business
// of handing out physical pointers that we can directly write to,
// we set the address of the setup packet to be the first 8 bytes of
// the data buffer, which we then set to the physical address.
auto* request_data = reinterpret_cast<USBRequestData*>(buffer().as_ptr());
request_data->request_type = request.request_type;
request_data->request = request.request;
request_data->value = request.value;
request_data->index = request.index;
request_data->length = request.length;
m_request = request;
}
}
|
