forked from KolibriOS/kolibrios
kolibri-ahci:
- use spinlocks (added two functions) instead of delays in ahci_port_identify - small changes git-svn-id: svn://kolibrios.org@9139 a494cfbc-eb01-0410-851d-a64ba20cac60
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@ -26,6 +26,10 @@ AHCI_DEV_SATAPI = 4
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; ATA commands
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ATA_IDENTIFY = 0xEC
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; ATA constants
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ATA_DEV_BUSY = 0x80
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ATA_DEV_DRQ = 0x08
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; ATAPI commands
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ATAPI_IDENTIFY = 0xA1
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@ -45,6 +49,7 @@ bit_AHCI_HBA_PxCMD_ST = 0
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bit_AHCI_HBA_PxCMD_FRE = 4
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bit_AHCI_HBA_PxCMD_FR = 14
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bit_AHCI_HBA_PxCMD_CR = 15
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bit_AHCI_HBA_PxIS_TFES = 30
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AHCI_HBA_PxCMD_ST = 1 shl 0
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AHCI_HBA_PxCMD_FRE = 1 shl 4
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@ -60,6 +65,8 @@ AHCI_HBA_PxSSTS_DET_PRESENT = 3
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AHCI_MAX_PORTS = 32 ;
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;HBA_MEMORY_SIZE = 0x1100
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AHCI_PORT_TIMEOUT = 1000000
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; Frame Information Structure Types
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FIS_TYPE_REG_H2D = 0x27 ; Register FIS - host to device
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FIS_TYPE_REG_D2H = 0x34 ; Register FIS - device to host
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@ -619,37 +626,21 @@ proc ahci_port_identify stdcall, pdata: dword
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@@:
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mov byte [eax + HBA_CMD_TBL.cfis + FIS_REG_H2D.device], 0
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; TODO Wait on previous command to complete. AHCIPortWait(bd->port_num, tS + 2);
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mov ebx, 20 ;;;
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call delay_hs ;;;
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; Wait on previous command to complete, before issuing new command.
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stdcall ahci_port_wait, edi, AHCI_PORT_TIMEOUT
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; DEBUGF 1, "eax = %x\n", eax
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; TODO check eax error value
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mov eax, [cmdslot]
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bts [edi + HBA_PORT.command_issue], eax ; Issue the command
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; TODO AHCIPortCmdWait(bd->port_num, cmd_slot);
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mov ebx, 20 ;;;
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call delay_hs ;;;
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; Wait for command completion
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stdcall ahci_port_cmd_wait, edi, eax;, AHCI_PORT_CMD_TIMEOUT
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; DEBUGF 1, " eax = %x\n", eax
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; TODO check eax error value
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; DEBUGF 1, "sata_error register = 0x%x\n", [edi + HBA_PORT.sata_error]
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; mov ecx, ecx
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; mov esi, [buf_virt]
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; .print_ident:
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; cmp ecx, 512 - 1 ; why -1 ?
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; jae .end_print_ident
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; mov al, byte [esi + ecx]
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; mov byte [modelstr], al
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; mov byte [modelstr + 1], 0
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; DEBUGF 1, "(%s) ", modelstr
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; inc ecx
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; jmp .print_ident
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; .end_print_ident:
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; DEBUGF 1, "\n"
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; DEBUGF 1, "after identification: signature = 0x%x\n", [edi + HBA_PORT.signature]
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mov esi, [buf_virt]
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add esi, 27*2
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mov edi, modelstr
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@ -702,28 +693,84 @@ ahci_stop_cmd:
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ret
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; The commands may not take effect until the command
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; register is read again by software, because reasons.
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; in: eax - address of HBA_PORT structure
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; out: eax - command register value
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ahci_flush_cmd:
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mov eax, [eax + HBA_PORT.command]
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; waits until the port is no longer busy before issuing a new command
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; in: [port] - address of HBA_PORT structure
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; [timeout] - timeout (in iterations)
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; out: eax = 0 if success, 1 if timeout expired
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proc ahci_port_wait stdcall, port: dword, timeout: dword
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push ebx ecx
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mov ebx, [port]
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xor ecx, ecx
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.wait:
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cmp ecx, [timeout]
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jae .wait_end
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mov eax, [ebx + HBA_PORT.task_file_data]
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and eax, ATA_DEV_BUSY or ATA_DEV_DRQ
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test eax, eax
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jz .wait_end
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inc ecx
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jmp .wait
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.wait_end:
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xor eax, eax
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DEBUGF 1, "port wait counter = %u\n", ecx
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cmp ecx, [timeout] ; if they equal it means port is hung
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setz al
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pop ecx ebx
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ret
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endp
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; Send command to port
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; in: eax - address of HBA_PORT structure
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; ebx - index of command slot
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ahci_send_cmd:
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push ecx
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mov [eax + HBA_PORT.interrupt_status], 0xFFFFFFFF
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mov cl, bl
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mov [eax + HBA_PORT.command_issue], 1
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shl [eax + HBA_PORT.command_issue], cl
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call ahci_flush_cmd
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pop ecx
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; Wait for command completion
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; in: [port] - address of HBA_PORT structure
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; [cmdslot] - number of command slot
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; out: eax = 0 if success, 1 if error
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proc ahci_port_cmd_wait stdcall, port: dword, cmdslot: dword ;, timeout: dword
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push ebx ecx edx
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mov ebx, [port]
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mov edx, [cmdslot]
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xor eax, eax
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xor ecx, ecx
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.wait:
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bt [ebx + HBA_PORT.command_issue], edx
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jnc .wait_end
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bt [ebx + HBA_PORT.interrupt_status], bit_AHCI_HBA_PxIS_TFES ; check for Task File Error
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jc .error
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inc ecx
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jmp .wait
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.wait_end:
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DEBUGF 1, "port cmd wait counter = %u\n", ecx
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bt [ebx + HBA_PORT.interrupt_status], bit_AHCI_HBA_PxIS_TFES ; check for Task File Error
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jc .error
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jmp .ret
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.error:
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mov eax, 1
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.ret:
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pop edx ecx ebx
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ret
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endp
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; ; The commands may not take effect until the command
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; ; register is read again by software, because reasons.
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; ; in: eax - address of HBA_PORT structure
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; ; out: eax - command register value
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; ahci_flush_cmd:
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; mov eax, [eax + HBA_PORT.command]
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; ret
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; ; Send command to port
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; ; in: eax - address of HBA_PORT structure
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; ; ebx - index of command slot
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; ahci_send_cmd:
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; push ecx
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; mov [eax + HBA_PORT.interrupt_status], 0xFFFFFFFF
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; mov cl, bl
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; mov [eax + HBA_PORT.command_issue], 1
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; shl [eax + HBA_PORT.command_issue], cl
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; call ahci_flush_cmd
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; pop ecx
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; ret
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; ---------------------------------------------------------------------------
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; in: port - address of HBA_PORT structure
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