RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 01:17:35 +00:00
Code Issues Activity Actions

Kernel: Wait for NVMe controller to change enabled state

Browse source 
We need to wait up to CAP.TO units of 500ms when changing CC.EN to
enable or disable the controller.
This commit is contained in:
Tom 2022-01-15 13:45:50 -07:00 • committed by Brian Gianforcaro
parent 8a879e205b
commit 0d65af5e0f
3 changed files with 61 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Kernel/Storage/NVMe/NVMeDefinitions.h
View file

@ -46,17 +46,31 @@ static constexpr u8 DBL_REG_SIZE = 8;
// CAP
static constexpr u8 CAP_DBL_SHIFT = 32;
static constexpr u8 CAP_DBL_MASK = 0xf;
static constexpr u8 CAP_TO_SHIFT = 24;
static constexpr u64 CAP_TO_MASK = 0xff << CAP_TO_SHIFT;
static constexpr u16 MQES(u64 cap)
{
return (cap & 0xffff) + 1;
}
static constexpr u32 CAP_TO(u64 cap)
{
return (cap & CAP_TO_MASK) >> CAP_TO_SHIFT;
}
// CC – Controller Configuration
static constexpr u8 CC_EN_BIT = 0x0;
static constexpr u8 CSTS_RDY_BIT = 0x0;
static constexpr u8 CSTS_SHST_SHIFT = 2;
static constexpr u32 CSTS_SHST_MASK = 0x3 << CSTS_SHST_SHIFT;
static constexpr u8 CC_IOSQES_BIT = 16;
static constexpr u8 CC_IOCQES_BIT = 20;
static constexpr u32 CSTS_SHST(u32 x)
{
return (x & CSTS_SHST_MASK) >> CSTS_SHST_SHIFT;
}
static constexpr u16 CC_AQA_MASK = (0xfff);
static constexpr u16 ACQ_SIZE(u32 x)
{