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Add initial AHCI structures and probe capabilities

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Justin C. Miller
2018-05-09 02:30:06 -07:00
parent b389e75d33
commit 7ded9fe219
3 changed files with 118 additions and 0 deletions
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88
src/kernel/ahci.cpp Normal file
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#include "kutil/enum_bitfields.h"
#include "ahci.h"
#include "log.h"
#include "device_manager.h"
#include "page_manager.h"
enum class ata_status : uint8_t
{
error = 0x01,
index = 0x02,
corrected = 0x04,
data_ready = 0x08,
seek_done = 0x10,
fault = 0x20,
ready = 0x40,
busy = 0x80
};
IS_BITFIELD(ata_status);
enum class ata_error : uint8_t
{
amnf = 0x01, // Address mark not found
tkznf = 0x02, // Track 0 not found
abort = 0x04, // Command abort
mcr = 0x08, // No media
idnf = 0x10, // Id not found
mc = 0x20, // No media
unc = 0x40, // Uncorrectable
bbk = 0x80, // Bad sector
};
IS_BITFIELD(ata_error);
enum class ata_cmd : uint8_t
{
read_pio = 0x20,
read_pio_ext = 0x24,
read_dma = 0xC8,
read_dma_ext = 0x25,
write_pio = 0x30,
write_pio_ext = 0x34,
write_dma = 0xCA,
write_dma_ext = 0x35,
cache_flush = 0xE7,
cache_flush_ext = 0xEA,
packet = 0xA0,
identify_packet = 0xA1,
identify = 0xEC
};
ahci_driver::ahci_driver()
{
}
void
ahci_driver::register_device(pci_device *device)
{
log::info(logs::driver, "AHCI registering device %d:%d:%d:",
device->bus(), device->device(), device->function());
uint32_t bar5 = device->get_bar(5);
uint32_t *bara = reinterpret_cast<uint32_t *>(bar5 & ~0xfffull);
page_manager *pm = page_manager::get();
pm->map_offset_pointer(reinterpret_cast<void **>(&bara), 0x2000);
uint32_t cap = bara[0];
log::info(logs::driver, " %d ports", (cap & 0xf) + 1);
log::info(logs::driver, " %d command slots", ((cap >> 8) & 0x1f) + 1);
log::info(logs::driver, " Supports:");
if (cap & 0x80000000) log::info(logs::driver, " - 64 bit addressing");
if (cap & 0x40000000) log::info(logs::driver, " - native command queuing");
if (cap & 0x20000000) log::info(logs::driver, " - SNotification register");
if (cap & 0x10000000) log::info(logs::driver, " - mechanical presence switches");
if (cap & 0x08000000) log::info(logs::driver, " - staggered spin up");
if (cap & 0x04000000) log::info(logs::driver, " - agressive link power management");
if (cap & 0x02000000) log::info(logs::driver, " - activity LED");
if (cap & 0x01000000) log::info(logs::driver, " - command list override");
if (cap & 0x00040000) log::info(logs::driver, " - AHCI only");
if (cap & 0x00020000) log::info(logs::driver, " - port multiplier");
if (cap & 0x00010000) log::info(logs::driver, " - FIS switching");
if (cap & 0x00008000) log::info(logs::driver, " - PIO multiple DRQ");
if (cap & 0x00004000) log::info(logs::driver, " - slumber state");
if (cap & 0x00002000) log::info(logs::driver, " - partial state");
if (cap & 0x00000080) log::info(logs::driver, " - command completion coalescing");
if (cap & 0x00000040) log::info(logs::driver, " - enclosure management");
if (cap & 0x00000020) log::info(logs::driver, " - external SATA");
}