1186 lines
43 KiB
C
1186 lines
43 KiB
C
// AHCI storage driver. This file owns controller attachment, drive discovery, command submission, and worker-driven IRP completion.
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#include "ahci.h"
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const NTL_DDK* gAhciDdk;
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DRIVER_OBJECT g_driver;
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static AHCI_CONTROLLER* g_controllers[MAX_AHCI_CONTROLLERS];
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static int g_controllerCount;
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static uint8_t g_nextDiskIndex;
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#define AHCI_COMMAND_TIMEOUT_MS 10000ull
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#define AHCI_PORT_ERROR_MASK \
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(PORT_IS_TFES | PORT_IS_HBFS | PORT_IS_HBDS | PORT_IS_IFS)
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#define AHCI_PORT_TERMINAL_MASK (PORT_IS_DHRS | AHCI_PORT_ERROR_MASK)
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static const IO_DEVICE_ID g_ahciIds[] = {
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{ IoBusPci, { "PCI\\CC_010601", sizeof("PCI\\CC_010601") - 1 } },
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};
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static const IO_DRIVER_ID_TABLE g_ahciIdTable = {
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g_ahciIds,
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sizeof(g_ahciIds) / sizeof(g_ahciIds[0]),
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};
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// Helpers.
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static KSTATUS AhciStartController(AHCI_CONTROLLER* ctl);
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static void AhciUnregisterController(AHCI_CONTROLLER* ctl);
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// Accessors for port structure memory at known CPU and device-address offsets.
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static inline HBA_CMD_HEADER* cmd_list(AHCI_DRIVE* drv) {
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return (HBA_CMD_HEADER*)((uint8_t*)drv->structVirt + PORT_OFF_CMDLIST);
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}
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// Returns the command-list device address.
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static inline uint64_t cmd_list_device_address(AHCI_DRIVE* drv) {
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return drv->structDeviceAddress + PORT_OFF_CMDLIST;
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}
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// Returns the received-FIS device address.
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static inline uint64_t fis_device_address(AHCI_DRIVE* drv) {
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return drv->structDeviceAddress + PORT_OFF_FIS;
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}
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static inline HBA_CMD_TBL* cmd_tbl(AHCI_DRIVE* drv, int slot) {
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return (HBA_CMD_TBL*)((uint8_t*)drv->structVirt
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+ PORT_OFF_CMDTBLS
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+ (uint32_t)slot * PORT_CMDTBL_SIZE);
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}
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// Returns one command-table device address.
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static inline uint64_t cmd_tbl_device_address(AHCI_DRIVE* drv, int slot) {
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return drv->structDeviceAddress + PORT_OFF_CMDTBLS
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+ (uint64_t)slot * PORT_CMDTBL_SIZE;
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}
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// Port engine start / stop (polling safe).
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// Port memory initialisation.
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// Stops one drive worker before its queue and DMA storage are released.
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static void AhciStopWorker(AHCI_DRIVE* drv) {
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if (!drv)
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return;
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drv->workerRunning = false;
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if (drv->irpQueue.Semaphore)
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KeSignalSemaphore(drv->irpQueue.Semaphore);
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if (drv->workerThread && drv->workerFinished)
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(void)KeWaitForEvent(drv->workerFinished, 0);
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if (drv->workerThread) {
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ObDereferenceObject((OBJECT*)drv->workerThread);
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drv->workerThread = (THREAD*)0;
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}
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if (drv->workerFinished) {
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ObDereferenceObject(&drv->workerFinished->Header);
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drv->workerFinished = (EVENT*)0;
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}
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}
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// Releases the non-DMA synchronization objects owned by one AHCI drive.
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static void AhciReleaseDriveRuntime(AHCI_DRIVE* drv) {
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if (!drv)
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return;
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AhciStopWorker(drv);
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if (drv->removeLockReady) {
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IoDestroyRemoveLock(&drv->removeLock);
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drv->removeLockReady = false;
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}
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if (drv->irpQueue.Semaphore) {
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ObDereferenceObject(&drv->irpQueue.Semaphore->Header);
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drv->irpQueue.Semaphore = (SEMAPHORE*)0;
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}
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if (drv->completionEvent) {
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ObDereferenceObject(&drv->completionEvent->Header);
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drv->completionEvent = (EVENT*)0;
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}
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}
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// Releases the DMA buffers owned by one AHCI drive.
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static void AhciReleaseDriveDma(AHCI_DRIVE* drv) {
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if (!drv || !gAhciDdk || !gAhciDdk->Dma)
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return;
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if (drv->port && drv->controller &&
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!drv->surpriseRemoved && !drv->controller->surpriseRemoved)
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port_stop(drv->port);
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gAhciDdk->Dma->FreeCommonBuffer(drv->bounceDma);
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gAhciDdk->Dma->FreeCommonBuffer(drv->structDma);
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drv->bounceDma = (IO_DMA_BUFFER*)0;
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drv->structDma = (IO_DMA_BUFFER*)0;
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drv->bounceDeviceAddress = 0;
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drv->structDeviceAddress = 0;
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drv->bounceVirt = (void*)0;
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drv->structVirt = (void*)0;
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}
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// Allocates and programs one port's command, FIS, and bounce buffers.
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static KSTATUS port_init_memory(AHCI_DRIVE* drv) {
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if (!drv || !drv->controller || !drv->controller->dmaAdapter)
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return NTLSTATUS_INVALID_PARAMETER;
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KSTATUS status = gAhciDdk->Dma->AllocateCommonBuffer(drv->controller->dmaAdapter,
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PORT_PAGES_STRUCT * PAGE_SIZE,
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PAGE_SIZE,
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&drv->structDma);
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if (!KSUCCESS(status))
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return status;
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drv->structVirt = gAhciDdk->Dma->GetCommonBufferAddress(drv->structDma);
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drv->structDeviceAddress = gAhciDdk->Dma->GetCommonBufferDeviceAddress(drv->structDma);
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status = gAhciDdk->Dma->AllocateCommonBuffer(drv->controller->dmaAdapter,
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BOUNCE_BYTES,
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PAGE_SIZE,
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&drv->bounceDma);
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if (!KSUCCESS(status)) {
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AhciReleaseDriveDma(drv);
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return status;
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}
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drv->bounceVirt = gAhciDdk->Dma->GetCommonBufferAddress(drv->bounceDma);
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drv->bounceDeviceAddress = gAhciDdk->Dma->GetCommonBufferDeviceAddress(drv->bounceDma);
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HBA_PORT* port = drv->port;
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port_stop(port);
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port->clb = (uint32_t)(cmd_list_device_address(drv) & 0xFFFFFFFF);
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port->clbu = (uint32_t)(cmd_list_device_address(drv) >> 32);
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port->fb = (uint32_t)(fis_device_address(drv) & 0xFFFFFFFF);
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port->fbu = (uint32_t)(fis_device_address(drv) >> 32);
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HBA_CMD_HEADER* hdrs = cmd_list(drv);
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for (int i = 0; i < NUM_CMD_SLOTS; i++) {
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hdrs[i].prdtl = PORT_PRDT_COUNT;
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uint64_t table = cmd_tbl_device_address(drv, i);
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hdrs[i].ctba = (uint32_t)(table & 0xFFFFFFFF);
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hdrs[i].ctbau = (uint32_t)(table >> 32);
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}
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port->serr = (uint32_t)-1;
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port->is = (uint32_t)-1;
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port_start(port);
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return NTLSTATUS_SUCCESS;
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}
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// Issue a command - polling fallback (used during early init / IDENTIFY only,
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// before the scheduler and interrupt handler are live).
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// Returns NTLSTATUS_SUCCESS, NTLSTATUS_DEVICE_ERROR, or NTLSTATUS_TIMEOUT.
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static KSTATUS port_issue_cmd_poll(AHCI_DRIVE* drv) {
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HBA_PORT* port = drv->port;
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// Clear pending interrupts before issuing.
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port->is = (uint32_t)-1;
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// Wait for port to be idle (not BSY or DRQ).
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int spin = 0;
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while ((port->tfd & (ATA_SR_BUSY | ATA_SR_DRQ)) && spin < POLL_TIMEOUT)
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spin++;
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if (spin == POLL_TIMEOUT) {
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DbgPrint("AHCI: port hung (pre-issue)\n");
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return NTLSTATUS_TIMEOUT;
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}
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// Issue slot 0.
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port->ci = (1u << 0);
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// Poll until slot 0 clears, but never let early-init I/O hang forever.
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spin = 0;
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while ((port->ci & (1u << 0)) && spin < POLL_TIMEOUT) {
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if (port->is & AHCI_PORT_ERROR_MASK) {
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DbgPrint("AHCI: error IS=0x%x TFD=0x%x SERR=0x%x\n",
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port->is, port->tfd, port->serr);
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port->serr = (uint32_t)-1;
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port->is = (uint32_t)-1;
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return NTLSTATUS_DEVICE_ERROR;
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}
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spin++;
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}
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if (port->ci & (1u << 0)) {
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DbgPrint("AHCI: command timed out while polling CI=0x%x TFD=0x%x IS=0x%x SERR=0x%x\n",
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port->ci, port->tfd, port->is, port->serr);
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return NTLSTATUS_TIMEOUT;
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}
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if (port->is & PORT_IS_TFES) {
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DbgPrint("AHCI: TFES after completion TFD=0x%x\n", port->tfd);
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port->is = (uint32_t)-1;
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return NTLSTATUS_DEVICE_ERROR;
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}
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return NTLSTATUS_SUCCESS;
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}
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// Recovers a port after a command that cannot be trusted to have retired.
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static void AhciRecoverPort(AHCI_DRIVE* drv) {
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if (!drv || !drv->port)
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return;
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HBA_PORT* port = drv->port;
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uint32_t savedIe = port->ie;
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// Keep reset-generated FIS traffic from satisfying a command waiter.
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port->ie = 0;
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KSTATUS status = port_comreset(drv);
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port->serr = (uint32_t)-1;
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port->is = (uint32_t)-1;
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drv->lastIs = 0;
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if (drv->completionEvent)
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KeClearEvent(drv->completionEvent);
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port->ie = savedIe;
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if (!KSUCCESS(status)) {
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DbgPrint("AHCI: port recovery failed st=0x%x CI=0x%x TFD=0x%x SSTS=0x%x\n",
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status, port->ci, port->tfd, port->ssts);
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}
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}
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// Interrupt bottom half. The ISR owns hardware acknowledgement and status
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// capture; this DPC wakes the worker thread after the hard IRQ has unwound.
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static void AhciCompletionDpc(KDPC* dpc, void* context,
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void* systemArgument1, void* systemArgument2) {
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(void)dpc;
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(void)systemArgument1;
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(void)systemArgument2;
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AHCI_DRIVE* drv = (AHCI_DRIVE*)context;
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if (drv && drv->completionEvent)
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KeSignalEvent(drv->completionEvent);
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}
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// ISR - called from KeIrqDispatch on the AHCI PCI IRQ line.
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// Walks all registered drives, checks if their port raised an interrupt,
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// captures IS, clears it, and queues the per-drive completion DPC.
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static void AhciIsr(void) {
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for (int c = 0; c < g_controllerCount; c++) {
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AHCI_CONTROLLER* ctl = g_controllers[c];
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if (!ctl || !ctl->hba || ctl->removed)
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continue;
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// GHC.IS tells us which ports are pending for this HBA.
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uint32_t pending = ctl->hba->is;
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if (!pending)
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continue;
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for (int i = 0; i < ctl->driveCount; i++) {
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AHCI_DRIVE* drv = &ctl->drives[i];
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uint32_t portBit = (1u << drv->portNo);
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if (!(pending & portBit)) continue;
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// Capture and clear port IS before queueing the bottom half. The
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// waiter reads lastIs to check for errors without racing the next
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// command. OR in case hardware reports multiple causes before the
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// DPC releases the worker.
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uint32_t portIs = drv->port->is;
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drv->port->is = portIs; // W1C - write back to clear
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drv->lastIs |= portIs;
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// Clear the HBA-level bit.
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ctl->hba->is = portBit;
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// DMA Setup, PIO Setup, and other progress interrupts are not
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// command completion. Only wake the worker for D2H completion or
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// an error that terminates the command.
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if (portIs & AHCI_PORT_TERMINAL_MASK)
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KeInsertQueueDpc(&drv->completionDpc, (void*)0, (void*)0);
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}
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}
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}
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// Issue a command - interrupt-driven (runtime path).
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// Caller has already built slot 0 via build_rw_cmd / port_identify.
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// Blocks the current thread until the ISR signals completionEvent.
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static KSTATUS port_issue_cmd(AHCI_DRIVE* drv) {
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if (drv->controller && drv->controller->pollingMode)
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return port_issue_cmd_poll(drv);
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HBA_PORT* port = drv->port;
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// A serialized slot must be idle before reuse. A stale active bit means a
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// prior command escaped normal completion and must be recovered first.
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if (port->ci & (1u << 0)) {
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DbgPrint("AHCI: slot 0 still active before issue CI=0x%x TFD=0x%x IS=0x%x SERR=0x%x\n",
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port->ci, port->tfd, port->is, port->serr);
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AhciRecoverPort(drv);
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if (port->ci & (1u << 0))
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return NTLSTATUS_DEVICE_ERROR;
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}
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// Clear stale software and hardware completion state before submission.
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// The event can otherwise retain a late DPC signal from an older command.
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KeClearEvent(drv->completionEvent);
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port->is = (uint32_t)-1;
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drv->lastIs = 0;
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// Wait for port idle.
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int spin = 0;
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while ((port->tfd & (ATA_SR_BUSY | ATA_SR_DRQ)) && spin < POLL_TIMEOUT)
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spin++;
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if (spin == POLL_TIMEOUT) {
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DbgPrint("AHCI: port hung before issue TFD=0x%x IS=0x%x SERR=0x%x\n",
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port->tfd, port->is, port->serr);
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AhciRecoverPort(drv);
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return NTLSTATUS_TIMEOUT;
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}
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// Issue slot 0, then block with a finite deadline.
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port->ci = (1u << 0);
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EVENT* events[1] = { drv->completionEvent };
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KSTATUS waitStatus = KeWaitForMultipleEvents(events, 1, 0,
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AHCI_COMMAND_TIMEOUT_MS,
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(uint32_t*)0);
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// Merge any live status that was not consumed by the ISR. This lets a
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// missed IRQ still report the hardware error that accompanied it.
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uint32_t liveIs = port->is;
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uint32_t is = drv->lastIs | liveIs;
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if (liveIs)
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port->is = liveIs;
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if (is & AHCI_PORT_ERROR_MASK) {
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DbgPrint("AHCI: command error IS=0x%x CI=0x%x TFD=0x%x SERR=0x%x\n",
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is, port->ci, port->tfd, port->serr);
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AhciRecoverPort(drv);
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return NTLSTATUS_DEVICE_ERROR;
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}
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if (waitStatus == NTLSTATUS_TIMEOUT) {
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if (!(port->ci & (1u << 0))) {
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DbgPrint("AHCI: completion IRQ missed; command retired IS=0x%x TFD=0x%x SERR=0x%x\n",
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is, port->tfd, port->serr);
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return NTLSTATUS_SUCCESS;
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}
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DbgPrint("AHCI: command timeout CI=0x%x TFD=0x%x IS=0x%x SERR=0x%x\n",
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port->ci, port->tfd, is, port->serr);
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AhciRecoverPort(drv);
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return NTLSTATUS_TIMEOUT;
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}
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if (waitStatus != NTLSTATUS_SUCCESS)
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return waitStatus;
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// An interrupt is only completion if hardware has also retired slot 0.
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if (port->ci & (1u << 0)) {
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DbgPrint("AHCI: premature completion IRQ CI=0x%x TFD=0x%x IS=0x%x SERR=0x%x\n",
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port->ci, port->tfd, is, port->serr);
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AhciRecoverPort(drv);
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return NTLSTATUS_DEVICE_ERROR;
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}
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return NTLSTATUS_SUCCESS;
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}
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// Build a standard DMA read or write command in slot 0.
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static void build_rw_cmd(AHCI_DRIVE* drv, uint64_t lba, uint32_t sectors,
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uint64_t bufferDeviceAddress, bool write) {
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HBA_CMD_HEADER* hdr = cmd_list(drv); // slot 0
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HBA_CMD_TBL* tbl = cmd_tbl(drv, 0);
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memset(tbl, 0, PORT_CMDTBL_SIZE);
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// How many PRDT entries we need (each covers up to 8K = 16 sectors).
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uint32_t prdtl = (sectors + 15) / 16;
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if (prdtl > PORT_PRDT_COUNT) prdtl = PORT_PRDT_COUNT; // capped (see caller)
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hdr->cfl = sizeof(FIS_REG_H2D) / 4;
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hdr->w = write ? 1 : 0;
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hdr->prdtl = (uint16_t)prdtl;
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hdr->prdbc = 0;
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// Fill PRDT entries.
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uint32_t remaining = sectors;
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uint64_t buf = bufferDeviceAddress;
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for (uint32_t i = 0; i < prdtl; i++) {
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uint32_t sects = (remaining > 16) ? 16 : remaining;
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uint32_t bytes = sects * 512;
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tbl->prdt_entry[i].dba = (uint32_t)(buf & 0xFFFFFFFF);
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tbl->prdt_entry[i].dbau = (uint32_t)(buf >> 32);
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tbl->prdt_entry[i].dbc = bytes - 1; // hardware adds 1
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tbl->prdt_entry[i].i = (i == prdtl - 1) ? 1 : 0;
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buf += bytes;
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remaining -= sects;
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}
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// Build H2D FIS.
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FIS_REG_H2D* fis = (FIS_REG_H2D*)tbl->cfis;
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memset(fis, 0, sizeof(*fis));
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fis->fis_type = FIS_TYPE_REG_H2D;
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fis->c = 1;
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fis->command = write ? ATA_CMD_WRITE_DMA_EX : ATA_CMD_READ_DMA_EX;
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fis->device = 1u << 6; // LBA mode
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fis->lba0 = (uint8_t)(lba);
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fis->lba1 = (uint8_t)(lba >> 8);
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fis->lba2 = (uint8_t)(lba >> 16);
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fis->lba3 = (uint8_t)(lba >> 24);
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fis->lba4 = (uint8_t)(lba >> 32);
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fis->lba5 = (uint8_t)(lba >> 40);
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fis->countl = (uint8_t)(sectors & 0xFF);
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fis->counth = (uint8_t)(sectors >> 8);
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}
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// Builds a non-data ATA FLUSH CACHE EXT command in slot 0.
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static void build_flush_cmd(AHCI_DRIVE* drv) {
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HBA_CMD_HEADER* hdr = cmd_list(drv);
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HBA_CMD_TBL* tbl = cmd_tbl(drv, 0);
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memset(tbl, 0, PORT_CMDTBL_SIZE);
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hdr->cfl = sizeof(FIS_REG_H2D) / 4;
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hdr->w = 0;
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hdr->prdtl = 0;
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hdr->prdbc = 0;
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FIS_REG_H2D* fis = (FIS_REG_H2D*)tbl->cfis;
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memset(fis, 0, sizeof(*fis));
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fis->fis_type = FIS_TYPE_REG_H2D;
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fis->c = 1;
|
|
fis->command = ATA_CMD_FLUSH_EXT;
|
|
}
|
|
|
|
// Flushes the drive write cache through the serialized command worker.
|
|
static KSTATUS do_flush(AHCI_DRIVE* drv) {
|
|
if (!drv) return NTLSTATUS_INVALID_PARAMETER;
|
|
build_flush_cmd(drv);
|
|
return port_issue_cmd(drv);
|
|
}
|
|
|
|
// IDENTIFY command - fills a 512-byte buffer and returns it.
|
|
|
|
static KSTATUS port_identify(AHCI_DRIVE* drv) {
|
|
// Reuse bounce buffer for IDENTIFY data (512 bytes).
|
|
memset(drv->bounceVirt, 0, 512);
|
|
|
|
HBA_CMD_HEADER* hdr = cmd_list(drv);
|
|
HBA_CMD_TBL* tbl = cmd_tbl(drv, 0);
|
|
|
|
memset(tbl, 0, PORT_CMDTBL_SIZE);
|
|
|
|
hdr->cfl = sizeof(FIS_REG_H2D) / 4;
|
|
hdr->w = 0;
|
|
hdr->prdtl = 1;
|
|
hdr->prdbc = 0;
|
|
|
|
tbl->prdt_entry[0].dba = (uint32_t)(drv->bounceDeviceAddress & 0xFFFFFFFF);
|
|
tbl->prdt_entry[0].dbau = (uint32_t)(drv->bounceDeviceAddress >> 32);
|
|
tbl->prdt_entry[0].dbc = 512 - 1;
|
|
tbl->prdt_entry[0].i = 1;
|
|
|
|
FIS_REG_H2D* fis = (FIS_REG_H2D*)tbl->cfis;
|
|
memset(fis, 0, sizeof(*fis));
|
|
fis->fis_type = FIS_TYPE_REG_H2D;
|
|
fis->c = 1;
|
|
fis->command = ATA_CMD_IDENTIFY;
|
|
fis->device = 0;
|
|
|
|
// Poll: IDENTIFY runs before the scheduler and IRQ handler are live.
|
|
KSTATUS st = port_issue_cmd_poll(drv);
|
|
if (!KSUCCESS(st)) return st;
|
|
|
|
// Parse sector count from IDENTIFY data.
|
|
const uint16_t* id = (const uint16_t*)drv->bounceVirt;
|
|
|
|
if (id[ATA_IDENT_W83] & (1u << 10)) {
|
|
// 48-bit LBA supported.
|
|
drv->sectorCount = (uint64_t)id[ATA_IDENT_W100]
|
|
| ((uint64_t)id[ATA_IDENT_W100 + 1] << 16)
|
|
| ((uint64_t)id[ATA_IDENT_W100 + 2] << 32)
|
|
| ((uint64_t)id[ATA_IDENT_W100 + 3] << 48);
|
|
} else {
|
|
// 28-bit LBA.
|
|
drv->sectorCount = (uint64_t)id[ATA_IDENT_W60]
|
|
| ((uint64_t)id[ATA_IDENT_W60 + 1] << 16);
|
|
}
|
|
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
|
|
// Core read logic.
|
|
static KSTATUS do_read(AHCI_DRIVE* drv, uint64_t lba,
|
|
uint32_t count, void* buf) {
|
|
uint8_t* out = (uint8_t*)buf;
|
|
|
|
while (count > 0) {
|
|
uint32_t batch = (count > BOUNCE_SECTORS) ? BOUNCE_SECTORS : count;
|
|
|
|
build_rw_cmd(drv, lba, batch, drv->bounceDeviceAddress, false);
|
|
KSTATUS st = port_issue_cmd(drv);
|
|
if (!KSUCCESS(st)) return st;
|
|
|
|
memcpy(out, drv->bounceVirt, (size_t)batch * 512);
|
|
out += (size_t)batch * 512;
|
|
lba += batch;
|
|
count -= batch;
|
|
}
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
|
|
// Core write logic.
|
|
static KSTATUS do_write(AHCI_DRIVE* drv, uint64_t lba,
|
|
uint32_t count, const void* buf) {
|
|
const uint8_t* in = (const uint8_t*)buf;
|
|
|
|
while (count > 0) {
|
|
uint32_t batch = (count > BOUNCE_SECTORS) ? BOUNCE_SECTORS : count;
|
|
|
|
memcpy(drv->bounceVirt, in, (size_t)batch * 512);
|
|
build_rw_cmd(drv, lba, batch, drv->bounceDeviceAddress, true);
|
|
KSTATUS st = port_issue_cmd(drv);
|
|
if (!KSUCCESS(st)) return st;
|
|
|
|
in += (size_t)batch * 512;
|
|
lba += batch;
|
|
count -= batch;
|
|
}
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
|
|
// Async IRP dispatch.
|
|
|
|
static KSTATUS AhciGetIrpReadWrite(IRP* irp, bool* outWrite, uint64_t* outLba,
|
|
uint32_t* outSectors, void** outBuffer) {
|
|
if (!irp || !outWrite || !outLba || !outSectors || !outBuffer)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
IO_STACK_LOCATION* ios = IoGetCurrentIrpStackLocation(irp);
|
|
if (!ios) return NTLSTATUS_INVALID_PARAMETER;
|
|
if (ios->MajorFunction != IRP_MJ_READ && ios->MajorFunction != IRP_MJ_WRITE)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
if ((ios->Parameters.ReadWrite.ByteOffset & 511ull) ||
|
|
(ios->Parameters.ReadWrite.Length & 511u))
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
if (!irp->UserBuffer || ios->Parameters.ReadWrite.Length == 0)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
*outWrite = (ios->MajorFunction == IRP_MJ_WRITE);
|
|
*outLba = ios->Parameters.ReadWrite.ByteOffset >> 9;
|
|
*outSectors = ios->Parameters.ReadWrite.Length >> 9;
|
|
*outBuffer = irp->UserBuffer;
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
|
|
// AhciDispatchReadWrite - DEVICE_OBJECT dispatch entry for disk IRPs.
|
|
// Accepted IRPs are queued to the per-drive worker and completed later with
|
|
// IoCompleteRequest(). Rejected IRPs are returned synchronously and are not
|
|
// completed.
|
|
static KSTATUS AhciDispatchReadWrite(DEVICE_OBJECT* device, IRP* irp) {
|
|
if (!device || !irp) return NTLSTATUS_INVALID_PARAMETER;
|
|
AHCI_DRIVE* drv = (AHCI_DRIVE*)device->DeviceExtension;
|
|
if (!drv) return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
KSTATUS st = IoAcquireRemoveLock(&drv->removeLock, irp);
|
|
if (!KSUCCESS(st))
|
|
return st;
|
|
|
|
bool write = false;
|
|
uint64_t lba = 0;
|
|
uint32_t sectors = 0;
|
|
void* buffer = (void*)0;
|
|
st = AhciGetIrpReadWrite(irp, &write, &lba, §ors, &buffer);
|
|
(void)write;
|
|
(void)buffer;
|
|
if (!KSUCCESS(st) || lba + sectors > drv->sectorCount) {
|
|
IoReleaseRemoveLock(&drv->removeLock, irp);
|
|
return KSUCCESS(st) ? NTLSTATUS_INVALID_PARAMETER : st;
|
|
}
|
|
|
|
irp->Status = NTLSTATUS_FAILURE;
|
|
irp->Information = 0;
|
|
IrpQueueEnqueue(&drv->irpQueue, irp);
|
|
return NTLSTATUS_PENDING;
|
|
}
|
|
|
|
// Cancels release Remove Lock.
|
|
static void AhciCancelReleaseRemoveLock(IRP* irp, void* context) {
|
|
AHCI_DRIVE* drv = (AHCI_DRIVE*)context;
|
|
if (drv)
|
|
IoReleaseRemoveLock(&drv->removeLock, irp);
|
|
}
|
|
|
|
// Dispatches drive Pnp.
|
|
static KSTATUS AhciDispatchDrivePnp(DEVICE_OBJECT* device, IRP* irp) {
|
|
if (!device || !irp) return NTLSTATUS_INVALID_PARAMETER;
|
|
AHCI_DRIVE* drv = (AHCI_DRIVE*)device->DeviceExtension;
|
|
if (!drv) return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
IO_STACK_LOCATION* ios = IoGetCurrentIrpStackLocation(irp);
|
|
if (!ios || ios->MajorFunction != IRP_MJ_PNP)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
switch ((IO_PNP_MINOR_FUNCTION)ios->MinorFunction) {
|
|
case IRP_MN_START_DEVICE:
|
|
device->PnpState = DevicePnpStarted;
|
|
return NTLSTATUS_SUCCESS;
|
|
case IRP_MN_QUERY_REMOVE_DEVICE:
|
|
device->PnpState = DevicePnpRemovePending;
|
|
return NTLSTATUS_SUCCESS;
|
|
case IRP_MN_CANCEL_REMOVE_DEVICE:
|
|
device->PnpState = DevicePnpStarted;
|
|
return NTLSTATUS_SUCCESS;
|
|
case IRP_MN_SURPRISE_REMOVAL:
|
|
drv->surpriseRemoved = true;
|
|
device->PnpState = DevicePnpSurpriseRemoved;
|
|
IrpQueueCancelAllWithCallback(&drv->irpQueue, NTLSTATUS_OBJECT_DEAD, AhciCancelReleaseRemoveLock, drv);
|
|
return NTLSTATUS_SUCCESS;
|
|
case IRP_MN_REMOVE_DEVICE:
|
|
drv->removed = true;
|
|
device->PnpState = DevicePnpDeleted;
|
|
IrpQueueCancelAllWithCallback(&drv->irpQueue, NTLSTATUS_OBJECT_DEAD, AhciCancelReleaseRemoveLock, drv);
|
|
if (drv->removeLockReady)
|
|
IoReleaseRemoveLockAndWait(&drv->removeLock, irp);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
IoDeleteDevice(device);
|
|
drv->deviceObject = (DEVICE_OBJECT*)0;
|
|
return NTLSTATUS_SUCCESS;
|
|
default:
|
|
return NTLSTATUS_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
|
|
// Dispatches controller Pnp.
|
|
static KSTATUS AhciDispatchControllerPnp(DEVICE_OBJECT* device, IRP* irp) {
|
|
if (!device || !irp) return NTLSTATUS_INVALID_PARAMETER;
|
|
AHCI_CONTROLLER* ctl = (AHCI_CONTROLLER*)device->DeviceExtension;
|
|
if (!ctl || ctl->magic != AHCI_CONTROLLER_MAGIC)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
IO_STACK_LOCATION* ios = IoGetCurrentIrpStackLocation(irp);
|
|
if (!ios || ios->MajorFunction != IRP_MJ_PNP)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
switch ((IO_PNP_MINOR_FUNCTION)ios->MinorFunction) {
|
|
case IRP_MN_START_DEVICE:
|
|
if (ctl->started) {
|
|
device->PnpState = DevicePnpStarted;
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
return AhciStartController(ctl);
|
|
|
|
case IRP_MN_QUERY_REMOVE_DEVICE:
|
|
device->PnpState = DevicePnpRemovePending;
|
|
return NTLSTATUS_SUCCESS;
|
|
|
|
case IRP_MN_CANCEL_REMOVE_DEVICE:
|
|
device->PnpState = DevicePnpStarted;
|
|
return NTLSTATUS_SUCCESS;
|
|
|
|
case IRP_MN_SURPRISE_REMOVAL:
|
|
ctl->surpriseRemoved = true;
|
|
device->PnpState = DevicePnpSurpriseRemoved;
|
|
for (int i = 0; i < ctl->driveCount; i++) {
|
|
AHCI_DRIVE* drv = &ctl->drives[i];
|
|
drv->surpriseRemoved = true;
|
|
if (drv->deviceObject)
|
|
(void)IoNotifyDiskSurpriseRemoved(drv->deviceObject->u.Disk.DiskIndex);
|
|
else
|
|
IrpQueueCancelAllWithCallback(&drv->irpQueue, NTLSTATUS_OBJECT_DEAD, AhciCancelReleaseRemoveLock, drv);
|
|
}
|
|
return NTLSTATUS_SUCCESS;
|
|
|
|
case IRP_MN_REMOVE_DEVICE:
|
|
ctl->removed = true;
|
|
device->PnpState = DevicePnpDeleted;
|
|
for (int i = 0; i < ctl->driveCount; i++) {
|
|
AHCI_DRIVE* drv = &ctl->drives[i];
|
|
if (drv->deviceObject) {
|
|
(void)IoUnregisterDiskDevice(drv->deviceObject->u.Disk.DiskIndex);
|
|
} else {
|
|
drv->removed = true;
|
|
IrpQueueCancelAllWithCallback(&drv->irpQueue, NTLSTATUS_OBJECT_DEAD, AhciCancelReleaseRemoveLock, drv);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
}
|
|
}
|
|
AhciUnregisterController(ctl);
|
|
gAhciDdk->Dma->PutAdapter(ctl->dmaAdapter);
|
|
ctl->dmaAdapter = (IO_DMA_ADAPTER*)0;
|
|
IoDetachDevice(device);
|
|
IoDeleteDevice(device);
|
|
return NTLSTATUS_SUCCESS;
|
|
|
|
default:
|
|
return NTLSTATUS_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
|
|
// Queues one write-cache flush on the per-drive worker.
|
|
static KSTATUS AhciDispatchFlush(DEVICE_OBJECT* device, IRP* irp) {
|
|
if (!device || !irp) return NTLSTATUS_INVALID_PARAMETER;
|
|
AHCI_DRIVE* drv = (AHCI_DRIVE*)device->DeviceExtension;
|
|
if (!drv || drv->magic != AHCI_DRIVE_MAGIC)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
KSTATUS st = IoAcquireRemoveLock(&drv->removeLock, irp);
|
|
if (!KSUCCESS(st))
|
|
return st;
|
|
|
|
IO_STACK_LOCATION* ios = IoGetCurrentIrpStackLocation(irp);
|
|
if (!ios || ios->MajorFunction != IRP_MJ_FLUSH_BUFFERS) {
|
|
IoReleaseRemoveLock(&drv->removeLock, irp);
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
irp->Status = NTLSTATUS_FAILURE;
|
|
irp->Information = 0;
|
|
IrpQueueEnqueue(&drv->irpQueue, irp);
|
|
return NTLSTATUS_PENDING;
|
|
}
|
|
|
|
// Dispatches pnp.
|
|
static KSTATUS AhciDispatchPnp(DEVICE_OBJECT* device, IRP* irp) {
|
|
if (!device || !device->DeviceExtension)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
uint32_t magic = *(uint32_t*)device->DeviceExtension;
|
|
if (magic == AHCI_CONTROLLER_MAGIC)
|
|
return AhciDispatchControllerPnp(device, irp);
|
|
if (magic == AHCI_DRIVE_MAGIC)
|
|
return AhciDispatchDrivePnp(device, irp);
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
// AhciWorker - kernel thread, one per drive.
|
|
// Dequeues IRPs and executes them one at a time using the existing
|
|
// single-slot interrupt-driven path. Completion fires the IRP's event
|
|
// and/or callback so the original caller can observe the result without
|
|
// ever having blocked in a driver call.
|
|
|
|
// NCQ remains serialized until the driver grows a multi-slot dispatcher:
|
|
// 1. Wait for a free slot and a pending IRP through the queue semaphore.
|
|
// 2. Pick the oldest IRP from the queue.
|
|
// 3. Grab a free bit in drv->slotMask (under the slot spinlock).
|
|
// 4. Copy write data into slotBounce[slot], build the NCQ FIS (FPDMA),
|
|
// record slotIrp[slot] = irp, and issue via port->sact + port->ci.
|
|
// 5. Return immediately so the ISR can drive all completions.
|
|
static void AhciWorker(uintptr_t arg) {
|
|
AHCI_DRIVE* drv = (AHCI_DRIVE*)arg;
|
|
|
|
while (drv && drv->workerRunning) {
|
|
// Block until AHCI dispatch signals a new IRP.
|
|
KeWaitSemaphore(drv->irpQueue.Semaphore, KE_WAIT_INFINITE);
|
|
if (!drv->workerRunning)
|
|
break;
|
|
|
|
IRP* irp = IrpQueueDequeue(&drv->irpQueue);
|
|
if (!irp)
|
|
continue;
|
|
|
|
IO_STACK_LOCATION* ios = IoGetCurrentIrpStackLocation(irp);
|
|
KSTATUS st = NTLSTATUS_INVALID_PARAMETER;
|
|
size_t information = 0;
|
|
|
|
if (ios && ios->MajorFunction == IRP_MJ_FLUSH_BUFFERS) {
|
|
st = do_flush(drv);
|
|
} else {
|
|
bool write = false;
|
|
uint64_t lba = 0;
|
|
uint32_t sectors = 0;
|
|
void* buffer = (void*)0;
|
|
st = AhciGetIrpReadWrite(irp, &write, &lba, §ors, &buffer);
|
|
if (KSUCCESS(st)) {
|
|
if (write)
|
|
st = do_write(drv, lba, sectors, buffer);
|
|
else
|
|
st = do_read(drv, lba, sectors, buffer);
|
|
if (KSUCCESS(st))
|
|
information = (size_t)sectors * 512u;
|
|
}
|
|
}
|
|
|
|
// Publish result then fire completion hooks through the common I/O path.
|
|
IoReleaseRemoveLock(&drv->removeLock, irp);
|
|
IoCompleteRequest(irp, st, information);
|
|
}
|
|
|
|
if (drv && drv->workerFinished)
|
|
KeSignalEvent(drv->workerFinished);
|
|
}
|
|
|
|
// AHCI controller initialisation.
|
|
|
|
// Before memory init: only check physical link. Signature is not yet valid.
|
|
|
|
// After COMRESET + FIS receive: check signature for SATA disk.
|
|
|
|
// Issue a COMRESET on the port, wait for link re-establishment and D2H FIS.
|
|
// FRE must already be set (port_init_memory does this) so the HBA can
|
|
// capture the signature FIS the device sends after the reset.
|
|
|
|
// Runtime commands are non-NCQ DMA commands. DHRS is their completion signal;
|
|
// setup/progress FIS interrupts must not wake the serialized command waiter.
|
|
|
|
// Registers controller.
|
|
static KSTATUS AhciRegisterController(AHCI_CONTROLLER* ctl) {
|
|
if (!ctl) return NTLSTATUS_INVALID_PARAMETER;
|
|
for (int i = 0; i < g_controllerCount; i++) {
|
|
if (g_controllers[i] == ctl)
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
if (g_controllerCount >= MAX_AHCI_CONTROLLERS)
|
|
return NTLSTATUS_NO_MEMORY;
|
|
g_controllers[g_controllerCount++] = ctl;
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
|
|
// Removes a controller from the interrupt registry.
|
|
static void AhciUnregisterController(AHCI_CONTROLLER* ctl) {
|
|
if (!ctl)
|
|
return;
|
|
for (int i = 0; i < g_controllerCount; i++) {
|
|
if (g_controllers[i] != ctl)
|
|
continue;
|
|
g_controllerCount--;
|
|
g_controllers[i] = g_controllers[g_controllerCount];
|
|
g_controllers[g_controllerCount] = (AHCI_CONTROLLER*)0;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Starts controller.
|
|
static KSTATUS AhciStartController(AHCI_CONTROLLER* ctl) {
|
|
if (!ctl || ctl->magic != AHCI_CONTROLLER_MAGIC || !ctl->pdo || !ctl->fdo)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
if (ctl->started)
|
|
return NTLSTATUS_SUCCESS;
|
|
|
|
KSTATUS st = PciGetDeviceInfo(ctl->pdo, &ctl->pciInfo);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: PciGetDeviceInfo failed: 0x%x\n", st);
|
|
return st;
|
|
}
|
|
|
|
DbgPrint("AHCI: controller at PCI %02x:%02x.%x vendor=%04x device=%04x\n",
|
|
ctl->pciInfo.Address.Bus,
|
|
ctl->pciInfo.Address.Device,
|
|
ctl->pciInfo.Address.Function,
|
|
ctl->pciInfo.VendorId,
|
|
ctl->pciInfo.DeviceId);
|
|
|
|
ctl->irq = 0xFFu;
|
|
ctl->usingMsi = false;
|
|
ctl->pollingMode = false;
|
|
|
|
st = PciEnableMsiAuto(ctl->pdo, &ctl->irq);
|
|
if (KSUCCESS(st)) {
|
|
ctl->usingMsi = true;
|
|
DbgPrint("AHCI: using MSI IRQ slot %u\n", (unsigned)ctl->irq);
|
|
} else {
|
|
KSTATUS intxStatus = PciGetInterrupt(ctl->pdo, &ctl->irq);
|
|
if (KSUCCESS(intxStatus) && ctl->irq != 0xFFu) {
|
|
DbgPrint("AHCI: using legacy INTx IRQ %u\n", (unsigned)ctl->irq);
|
|
} else {
|
|
ctl->irq = 0xFFu;
|
|
ctl->pollingMode = true;
|
|
DbgPrint("AHCI: no MSI/INTx interrupt available; using polled command completion (msi=0x%x intx=0x%x)\n",
|
|
st, intxStatus);
|
|
}
|
|
}
|
|
|
|
st = PciGetBar(ctl->pdo, AHCI_PCI_BAR_ABAR, &ctl->abar);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: BAR5/ABAR not present (0x%x)\n", st);
|
|
return st;
|
|
}
|
|
if (ctl->abar.Type != PciBarMemory32 && ctl->abar.Type != PciBarMemory64) {
|
|
DbgPrint("AHCI: BAR5/ABAR is not MMIO (type=%u)\n", ctl->abar.Type);
|
|
return NTLSTATUS_DEVICE_ERROR;
|
|
}
|
|
|
|
st = PciMapBar(ctl->pdo,
|
|
AHCI_PCI_BAR_ABAR,
|
|
PAGE_PRESENT | PAGE_WRITE | PAGE_CACHE_UC,
|
|
(void**)&ctl->hba,
|
|
&ctl->abarLength);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: PciMapBar(BAR5) failed: 0x%x\n", st);
|
|
return st;
|
|
}
|
|
|
|
uint32_t enableFlags = PCI_ENABLE_MEMORY | PCI_ENABLE_BUSMASTER;
|
|
if (ctl->usingMsi || ctl->pollingMode)
|
|
enableFlags |= PCI_DISABLE_INTX;
|
|
else
|
|
enableFlags |= PCI_ENABLE_INTX;
|
|
|
|
st = PciEnableDevice(ctl->pdo, enableFlags);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: PciEnableDevice failed: 0x%x\n", st);
|
|
return st;
|
|
}
|
|
|
|
DbgPrint("AHCI: ABAR phys=0x%016llX len=0x%llx version=0x%08x\n",
|
|
(unsigned long long)ctl->abar.Base,
|
|
(unsigned long long)ctl->abarLength,
|
|
ctl->hba->vs);
|
|
|
|
st = hba_reset(ctl->hba);
|
|
if (!KSUCCESS(st))
|
|
return st;
|
|
|
|
uint32_t cap = ctl->hba->cap;
|
|
uint32_t nPorts = (cap & 0x1F) + 1;
|
|
uint32_t nSlots = ((cap >> 8) & 0x1F) + 1;
|
|
bool s64a = !!(cap & (1u << 31));
|
|
DbgPrint("AHCI: cap=0x%08x ports=%u slots=%u 64bit=%d\n",
|
|
cap, nPorts, nSlots, (int)s64a);
|
|
|
|
IO_DMA_REQUIREMENTS dmaRequirements;
|
|
memset(&dmaRequirements, 0, sizeof(dmaRequirements));
|
|
dmaRequirements.MaximumDeviceAddress = s64a ? (uint64_t)-1 : 0xFFFFFFFFULL;
|
|
dmaRequirements.Alignment = 2;
|
|
dmaRequirements.MaximumSegmentLength = 1u << 22;
|
|
dmaRequirements.MaximumSegments = PORT_PRDT_COUNT;
|
|
st = gAhciDdk->Dma->GetAdapter(ctl->fdo, &dmaRequirements, &ctl->dmaAdapter);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: DMA adapter creation failed (0x%x)\n", st);
|
|
return st;
|
|
}
|
|
|
|
st = AhciRegisterController(ctl);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: controller registry full (0x%x)\n", st);
|
|
gAhciDdk->Dma->PutAdapter(ctl->dmaAdapter);
|
|
ctl->dmaAdapter = (IO_DMA_ADAPTER*)0;
|
|
return st;
|
|
}
|
|
|
|
// IoRegisterDiskDevice publishes arrival synchronously, and partition/filesystem
|
|
// consumers may issue reads from that callback. Install the controller ISR before
|
|
// any disk is published so an interrupt-driven drive can complete those reads.
|
|
if (!ctl->pollingMode)
|
|
KeIrqRegister(ctl->irq, AhciIsr);
|
|
|
|
uint32_t pi = ctl->hba->pi;
|
|
for (uint32_t portno = 0; portno < 32 && ctl->driveCount < MAX_AHCI_DRIVES; portno++) {
|
|
if (!(pi & (1u << portno))) continue;
|
|
|
|
HBA_PORT* port = &ctl->hba->ports[portno];
|
|
|
|
// Phase 1: physical link check.
|
|
if (!port_link_up(port)) {
|
|
DbgPrint("AHCI: port %u: no link (ssts=0x%08x)\n", portno, port->ssts);
|
|
continue;
|
|
}
|
|
|
|
DbgPrint("AHCI: port %u: link up, initializing...\n", portno);
|
|
|
|
int driveIdx = ctl->driveCount;
|
|
AHCI_DRIVE* drv = &ctl->drives[driveIdx];
|
|
memset(drv, 0, sizeof(*drv));
|
|
drv->magic = AHCI_DRIVE_MAGIC;
|
|
drv->controller = ctl;
|
|
drv->port = port;
|
|
drv->portNo = (uint8_t)portno;
|
|
|
|
// Phase 2: allocate command list, FIS buffer, bounce buffer.
|
|
st = port_init_memory(drv);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: port %u: memory init failed (0x%x)\n", portno, st);
|
|
continue;
|
|
}
|
|
|
|
// Phase 3: COMRESET - forces device to re-send D2H FIS for valid SIG.
|
|
st = port_comreset(drv);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: port %u: COMRESET failed\n", portno);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
|
|
// Phase 4: filter to SATA disks.
|
|
if (!port_is_sata_disk(port)) {
|
|
DbgPrint("AHCI: port %u: not a SATA disk (sig=0x%08x), skipping\n",
|
|
portno, port->sig);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
|
|
// Phase 5: create per-drive completion event (auto-reset, initially clear).
|
|
st = KeEventCreate(EventAutoReset, 0, &drv->completionEvent);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: port %u: event create failed (0x%x)\n", portno, st);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
KeInitializeDpc(&drv->completionDpc, AhciCompletionDpc, drv);
|
|
|
|
// Phase 5b: create the IRP queue semaphore and initialise the queue.
|
|
// The semaphore starts at 0; each submitted IRP increments it by one.
|
|
SEMAPHORE* irpSem = (SEMAPHORE*)0;
|
|
st = KeSemaphoreCreate(0, 0x7FFFFFFF, &irpSem);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: port %u: semaphore create failed (0x%x)\n", portno, st);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
IrpQueueInit(&drv->irpQueue, irpSem);
|
|
st = IoInitializeRemoveLock(&drv->removeLock);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: port %u: remove-lock init failed (0x%x)\n", portno, st);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
drv->removeLockReady = true;
|
|
|
|
// Phase 6: IDENTIFY remains polled until the disk runtime path is ready.
|
|
st = port_identify(drv);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: port %u: IDENTIFY failed (0x%x)\n", portno, st);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
|
|
DbgPrint("AHCI: drive %d: %llu sectors (%llu MB)\n",
|
|
g_nextDiskIndex,
|
|
(unsigned long long)drv->sectorCount,
|
|
(unsigned long long)(drv->sectorCount / 2048));
|
|
|
|
// Phase 7: create the disk DEVICE_OBJECT, but do not publish it until the
|
|
// asynchronous runtime path is fully operational.
|
|
st = IoCreateDevice(&g_driver, 0, &drv->deviceObject);
|
|
if (!KSUCCESS(st)) {
|
|
DbgPrint("AHCI: drive %d: IoCreateDevice failed (0x%x)\n", g_nextDiskIndex, st);
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
drv->deviceObject->DeviceExtension = drv;
|
|
drv->deviceObject->u.Disk.SectorCount = drv->sectorCount;
|
|
drv->deviceObject->u.Disk.SectorSize = 512;
|
|
drv->deviceObject->AlignmentRequirement = 512;
|
|
|
|
// Phase 8: start the per-drive IRP worker before publishing the disk.
|
|
// IoRegisterDiskDevice synchronously notifies partition consumers, which may
|
|
// immediately submit reads that must have a live worker and completion path.
|
|
st = KeEventCreate(EventManualReset, 0, &drv->workerFinished);
|
|
if (KSUCCESS(st)) {
|
|
drv->workerRunning = true;
|
|
const KE_THREAD_CREATE_PARAMETERS workerParameters = KE_THREAD_CREATE_NORMAL(PriorityHigh);
|
|
st = KeCreateKernelThread((uintptr_t)AhciWorker,
|
|
(uintptr_t)drv,
|
|
&workerParameters,
|
|
&drv->workerThread);
|
|
}
|
|
if (!KSUCCESS(st)) {
|
|
drv->workerRunning = false;
|
|
DbgPrint("AHCI: drive %u: worker creation failed (0x%x)\n", g_nextDiskIndex, st);
|
|
IoDeleteDevice(drv->deviceObject);
|
|
drv->deviceObject = (DEVICE_OBJECT*)0;
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
|
|
// Make the initialized drive visible to the controller ISR, then arm its
|
|
// interrupt source. No consumer can submit I/O until publication below.
|
|
ctl->driveCount++;
|
|
port->is = (uint32_t)-1;
|
|
port->ie = AHCI_PORT_TERMINAL_MASK;
|
|
|
|
// Phase 9: publish only after reads and writes can complete synchronously.
|
|
uint8_t diskIndex = g_nextDiskIndex;
|
|
st = IoRegisterDiskDevice(diskIndex, drv->deviceObject);
|
|
if (KSUCCESS(st)) {
|
|
DbgPrint("AHCI: drive %u registered\n", diskIndex);
|
|
g_nextDiskIndex++;
|
|
} else {
|
|
DbgPrint("AHCI: IoRegisterDiskDevice(%u) failed (0x%x)\n", diskIndex, st);
|
|
port->ie = 0;
|
|
ctl->driveCount--;
|
|
IoDeleteDevice(drv->deviceObject);
|
|
drv->deviceObject = (DEVICE_OBJECT*)0;
|
|
AhciReleaseDriveRuntime(drv);
|
|
AhciReleaseDriveDma(drv);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (ctl->driveCount == 0)
|
|
DbgPrint("AHCI: no drives found on PCI %02x:%02x.%x\n",
|
|
ctl->pciInfo.Address.Bus,
|
|
ctl->pciInfo.Address.Device,
|
|
ctl->pciInfo.Address.Function);
|
|
|
|
if (!ctl->pollingMode) {
|
|
DbgPrint("AHCI: ISR registered on IRQ %u (%s); controller drives=%d\n",
|
|
(unsigned)ctl->irq, ctl->usingMsi ? "MSI" : "INTx", ctl->driveCount);
|
|
} else {
|
|
DbgPrint("AHCI: controller started in polling mode; controller drives=%d\n",
|
|
ctl->driveCount);
|
|
}
|
|
ctl->started = true;
|
|
ctl->fdo->PnpState = DevicePnpStarted;
|
|
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
|
|
// Implements the add Device operation.
|
|
static KSTATUS AhciAddDevice(DRIVER_OBJECT* driver, DEVICE_OBJECT* physicalDeviceObject) {
|
|
if (!driver || !physicalDeviceObject || physicalDeviceObject->Type != DeviceObjectPhysical)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
DEVICE_OBJECT* fdo = (DEVICE_OBJECT*)0;
|
|
KSTATUS st = IoCreateDevice(driver, sizeof(AHCI_CONTROLLER), &fdo);
|
|
if (!KSUCCESS(st))
|
|
return st;
|
|
|
|
AHCI_CONTROLLER* ctl = (AHCI_CONTROLLER*)fdo->DeviceExtension;
|
|
memset(ctl, 0, sizeof(*ctl));
|
|
ctl->magic = AHCI_CONTROLLER_MAGIC;
|
|
ctl->fdo = fdo;
|
|
ctl->pdo = physicalDeviceObject;
|
|
ctl->irq = 0xFF;
|
|
(void)IoSetDeviceName(fdo, SYS_SV_LITERAL("ahci-controller"));
|
|
|
|
ctl->lowerDevice = IoAttachDeviceToDeviceStack(fdo, physicalDeviceObject);
|
|
if (!ctl->lowerDevice) {
|
|
IoDeleteDevice(fdo);
|
|
return NTLSTATUS_FAILURE;
|
|
}
|
|
|
|
DbgPrint("AHCI: FDO attached to %v\n", physicalDeviceObject->Name);
|
|
return NTLSTATUS_SUCCESS;
|
|
}
|
|
|
|
// Implements the driver Entry operation.
|
|
KSTATUS DriverEntry(const NTL_DDK* ddk, NTL_DRIVER_INIT* init) {
|
|
(void)init;
|
|
if (!ddk || !ddk->Memory || !ddk->Memory->PhysToVirt || !ddk->Dma)
|
|
return NTLSTATUS_INVALID_PARAMETER;
|
|
|
|
DbgPrint("AHCI: driver loading...\n");
|
|
gAhciDdk = ddk;
|
|
g_controllerCount = 0;
|
|
g_nextDiskIndex = 0;
|
|
|
|
memset(&g_driver, 0, sizeof(g_driver));
|
|
IoInitializeDriverObject(&g_driver, SYS_SV_LITERAL("ahci"));
|
|
g_driver.IdTable = &g_ahciIdTable;
|
|
g_driver.DriverAddDevice = AhciAddDevice;
|
|
g_driver.MajorFunction[IRP_MJ_READ] = AhciDispatchReadWrite;
|
|
g_driver.MajorFunction[IRP_MJ_WRITE] = AhciDispatchReadWrite;
|
|
g_driver.MajorFunction[IRP_MJ_FLUSH_BUFFERS] = AhciDispatchFlush;
|
|
g_driver.MajorFunction[IRP_MJ_PNP] = AhciDispatchPnp;
|
|
|
|
KSTATUS st = IoRegisterDriverObject(&g_driver);
|
|
if (!KSUCCESS(st))
|
|
DbgPrint("AHCI: IoRegisterDriverObject failed: 0x%x\n", st);
|
|
return st;
|
|
}
|