e33e5dce32
modularize it so that new transports can be created. Add a transport for SATA Add a periph+protocol layer for ATA Add a driver for AHCI-compliant hardware. Add a maxio field to CAM so that drivers can advertise their max I/O capability. Modify various drivers so that they are insulated from the value of MAXPHYS. The new ATA/SATA code supports AHCI-compliant hardware, and will override the classic ATA driver if it is loaded as a module at boot time or compiled into the kernel. The stack now support NCQ (tagged queueing) for increased performance on modern SATA drives. It also supports port multipliers. ATA drives are accessed via 'ada' device nodes. ATAPI drives are accessed via 'cd' device nodes. They can all be enumerated and manipulated via camcontrol, just like SCSI drives. SCSI commands are not translated to their ATA equivalents; ATA native commands are used throughout the entire stack, including camcontrol. See the camcontrol manpage for further details. Testing this code may require that you update your fstab, and possibly modify your BIOS to enable AHCI functionality, if available. This code is very experimental at the moment. The userland ABI/API has changed, so applications will need to be recompiled. It may change further in the near future. The 'ada' device name may also change as more infrastructure is completed in this project. The goal is to eventually put all CAM busses and devices until newbus, allowing for interesting topology and management options. Few functional changes will be seen with existing SCSI/SAS/FC drivers, though the userland ABI has still changed. In the future, transports specific modules for SAS and FC may appear in order to better support the topologies and capabilities of these technologies. The modularization of CAM and the addition of the ATA/SATA modules is meant to break CAM out of the mold of being specific to SCSI, letting it grow to be a framework for arbitrary transports and protocols. It also allows drivers to be written to support discrete hardware without jeopardizing the stability of non-related hardware. While only an AHCI driver is provided now, a Silicon Image driver is also in the works. Drivers for ICH1-4, ICH5-6, PIIX, classic IDE, and any other hardware is possible and encouraged. Help with new transports is also encouraged. Submitted by: scottl, mav Approved by: re
423 lines
17 KiB
C
423 lines
17 KiB
C
/*-
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* Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
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* Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/* ATA register defines */
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#define ATA_DATA 0 /* (RW) data */
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#define ATA_FEATURE 1 /* (W) feature */
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#define ATA_F_DMA 0x01 /* enable DMA */
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#define ATA_F_OVL 0x02 /* enable overlap */
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#define ATA_COUNT 2 /* (W) sector count */
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#define ATA_SECTOR 3 /* (RW) sector # */
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#define ATA_CYL_LSB 4 /* (RW) cylinder# LSB */
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#define ATA_CYL_MSB 5 /* (RW) cylinder# MSB */
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#define ATA_DRIVE 6 /* (W) Sector/Drive/Head */
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#define ATA_D_LBA 0x40 /* use LBA addressing */
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#define ATA_D_IBM 0xa0 /* 512 byte sectors, ECC */
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#define ATA_COMMAND 7 /* (W) command */
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#define ATA_ERROR 8 /* (R) error */
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#define ATA_E_ILI 0x01 /* illegal length */
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#define ATA_E_NM 0x02 /* no media */
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#define ATA_E_ABORT 0x04 /* command aborted */
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#define ATA_E_MCR 0x08 /* media change request */
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#define ATA_E_IDNF 0x10 /* ID not found */
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#define ATA_E_MC 0x20 /* media changed */
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#define ATA_E_UNC 0x40 /* uncorrectable data */
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#define ATA_E_ICRC 0x80 /* UDMA crc error */
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#define ATA_E_ATAPI_SENSE_MASK 0xf0 /* ATAPI sense key mask */
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#define ATA_IREASON 9 /* (R) interrupt reason */
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#define ATA_I_CMD 0x01 /* cmd (1) | data (0) */
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#define ATA_I_IN 0x02 /* read (1) | write (0) */
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#define ATA_I_RELEASE 0x04 /* released bus (1) */
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#define ATA_I_TAGMASK 0xf8 /* tag mask */
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#define ATA_STATUS 10 /* (R) status */
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#define ATA_ALTSTAT 11 /* (R) alternate status */
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#define ATA_S_ERROR 0x01 /* error */
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#define ATA_S_INDEX 0x02 /* index */
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#define ATA_S_CORR 0x04 /* data corrected */
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#define ATA_S_DRQ 0x08 /* data request */
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#define ATA_S_DSC 0x10 /* drive seek completed */
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#define ATA_S_SERVICE 0x10 /* drive needs service */
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#define ATA_S_DWF 0x20 /* drive write fault */
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#define ATA_S_DMA 0x20 /* DMA ready */
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#define ATA_S_READY 0x40 /* drive ready */
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#define ATA_S_BUSY 0x80 /* busy */
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#define ATA_CONTROL 12 /* (W) control */
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#define ATA_A_IDS 0x02 /* disable interrupts */
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#define ATA_A_RESET 0x04 /* RESET controller */
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#define ATA_A_4BIT 0x08 /* 4 head bits */
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#define ATA_A_HOB 0x80 /* High Order Byte enable */
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/* SATA register defines */
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#define ATA_SSTATUS 13
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#define ATA_SS_DET_MASK 0x0000000f
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#define ATA_SS_DET_NO_DEVICE 0x00000000
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#define ATA_SS_DET_DEV_PRESENT 0x00000001
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#define ATA_SS_DET_PHY_ONLINE 0x00000003
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#define ATA_SS_DET_PHY_OFFLINE 0x00000004
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#define ATA_SS_SPD_MASK 0x000000f0
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#define ATA_SS_SPD_NO_SPEED 0x00000000
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#define ATA_SS_SPD_GEN1 0x00000010
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#define ATA_SS_SPD_GEN2 0x00000020
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#define ATA_SS_SPD_GEN3 0x00000040
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#define ATA_SS_IPM_MASK 0x00000f00
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#define ATA_SS_IPM_NO_DEVICE 0x00000000
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#define ATA_SS_IPM_ACTIVE 0x00000100
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#define ATA_SS_IPM_PARTIAL 0x00000200
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#define ATA_SS_IPM_SLUMBER 0x00000600
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#define ATA_SERROR 14
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#define ATA_SE_DATA_CORRECTED 0x00000001
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#define ATA_SE_COMM_CORRECTED 0x00000002
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#define ATA_SE_DATA_ERR 0x00000100
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#define ATA_SE_COMM_ERR 0x00000200
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#define ATA_SE_PROT_ERR 0x00000400
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#define ATA_SE_HOST_ERR 0x00000800
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#define ATA_SE_PHY_CHANGED 0x00010000
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#define ATA_SE_PHY_IERROR 0x00020000
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#define ATA_SE_COMM_WAKE 0x00040000
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#define ATA_SE_DECODE_ERR 0x00080000
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#define ATA_SE_PARITY_ERR 0x00100000
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#define ATA_SE_CRC_ERR 0x00200000
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#define ATA_SE_HANDSHAKE_ERR 0x00400000
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#define ATA_SE_LINKSEQ_ERR 0x00800000
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#define ATA_SE_TRANSPORT_ERR 0x01000000
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#define ATA_SE_UNKNOWN_FIS 0x02000000
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#define ATA_SCONTROL 15
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#define ATA_SC_DET_MASK 0x0000000f
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#define ATA_SC_DET_IDLE 0x00000000
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#define ATA_SC_DET_RESET 0x00000001
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#define ATA_SC_DET_DISABLE 0x00000004
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#define ATA_SC_SPD_MASK 0x000000f0
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#define ATA_SC_SPD_NO_SPEED 0x00000000
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#define ATA_SC_SPD_SPEED_GEN1 0x00000010
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#define ATA_SC_SPD_SPEED_GEN2 0x00000020
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#define ATA_SC_SPD_SPEED_GEN3 0x00000040
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#define ATA_SC_IPM_MASK 0x00000f00
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#define ATA_SC_IPM_NONE 0x00000000
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#define ATA_SC_IPM_DIS_PARTIAL 0x00000100
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#define ATA_SC_IPM_DIS_SLUMBER 0x00000200
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#define ATA_SACTIVE 16
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#define AHCI_MAX_PORTS 32
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#define AHCI_MAX_SLOTS 32
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/* SATA AHCI v1.0 register defines */
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#define AHCI_CAP 0x00
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#define AHCI_CAP_NPMASK 0x0000001f
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#define AHCI_CAP_SXS 0x00000020
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#define AHCI_CAP_EMS 0x00000040
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#define AHCI_CAP_CCCS 0x00000080
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#define AHCI_CAP_NCS 0x00001F00
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#define AHCI_CAP_NCS_SHIFT 8
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#define AHCI_CAP_PSC 0x00002000
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#define AHCI_CAP_SSC 0x00004000
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#define AHCI_CAP_PMD 0x00008000
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#define AHCI_CAP_FBSS 0x00010000
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#define AHCI_CAP_SPM 0x00020000
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#define AHCI_CAP_SAM 0x00080000
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#define AHCI_CAP_ISS 0x00F00000
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#define AHCI_CAP_ISS_SHIFT 20
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#define AHCI_CAP_SCLO 0x01000000
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#define AHCI_CAP_SAL 0x02000000
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#define AHCI_CAP_SALP 0x04000000
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#define AHCI_CAP_SSS 0x08000000
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#define AHCI_CAP_SMPS 0x10000000
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#define AHCI_CAP_SSNTF 0x20000000
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#define AHCI_CAP_SNCQ 0x40000000
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#define AHCI_CAP_64BIT 0x80000000
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#define AHCI_GHC 0x04
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#define AHCI_GHC_AE 0x80000000
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#define AHCI_GHC_MRSM 0x00000004
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#define AHCI_GHC_IE 0x00000002
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#define AHCI_GHC_HR 0x00000001
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#define AHCI_IS 0x08
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#define AHCI_PI 0x0c
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#define AHCI_VS 0x10
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#define AHCI_OFFSET 0x100
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#define AHCI_STEP 0x80
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#define AHCI_P_CLB 0x00
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#define AHCI_P_CLBU 0x04
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#define AHCI_P_FB 0x08
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#define AHCI_P_FBU 0x0c
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#define AHCI_P_IS 0x10
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#define AHCI_P_IE 0x14
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#define AHCI_P_IX_DHR 0x00000001
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#define AHCI_P_IX_PS 0x00000002
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#define AHCI_P_IX_DS 0x00000004
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#define AHCI_P_IX_SDB 0x00000008
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#define AHCI_P_IX_UF 0x00000010
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#define AHCI_P_IX_DP 0x00000020
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#define AHCI_P_IX_PC 0x00000040
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#define AHCI_P_IX_DI 0x00000080
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#define AHCI_P_IX_PRC 0x00400000
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#define AHCI_P_IX_IPM 0x00800000
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#define AHCI_P_IX_OF 0x01000000
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#define AHCI_P_IX_INF 0x04000000
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#define AHCI_P_IX_IF 0x08000000
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#define AHCI_P_IX_HBD 0x10000000
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#define AHCI_P_IX_HBF 0x20000000
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#define AHCI_P_IX_TFE 0x40000000
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#define AHCI_P_IX_CPD 0x80000000
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#define AHCI_P_CMD 0x18
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#define AHCI_P_CMD_ST 0x00000001
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#define AHCI_P_CMD_SUD 0x00000002
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#define AHCI_P_CMD_POD 0x00000004
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#define AHCI_P_CMD_CLO 0x00000008
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#define AHCI_P_CMD_FRE 0x00000010
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#define AHCI_P_CMD_CCS_MASK 0x00001f00
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#define AHCI_P_CMD_CCS_SHIFT 8
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#define AHCI_P_CMD_ISS 0x00002000
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#define AHCI_P_CMD_FR 0x00004000
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#define AHCI_P_CMD_CR 0x00008000
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#define AHCI_P_CMD_CPS 0x00010000
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#define AHCI_P_CMD_PMA 0x00020000
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#define AHCI_P_CMD_HPCP 0x00040000
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#define AHCI_P_CMD_ISP 0x00080000
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#define AHCI_P_CMD_CPD 0x00100000
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#define AHCI_P_CMD_ATAPI 0x01000000
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#define AHCI_P_CMD_DLAE 0x02000000
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#define AHCI_P_CMD_ALPE 0x04000000
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#define AHCI_P_CMD_ASP 0x08000000
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#define AHCI_P_CMD_ICC_MASK 0xf0000000
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#define AHCI_P_CMD_NOOP 0x00000000
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#define AHCI_P_CMD_ACTIVE 0x10000000
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#define AHCI_P_CMD_PARTIAL 0x20000000
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#define AHCI_P_CMD_SLUMBER 0x60000000
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#define AHCI_P_TFD 0x20
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#define AHCI_P_SIG 0x24
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#define AHCI_P_SSTS 0x28
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#define AHCI_P_SCTL 0x2c
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#define AHCI_P_SERR 0x30
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#define AHCI_P_SACT 0x34
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#define AHCI_P_CI 0x38
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#define AHCI_P_SNTF 0x3C
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#define AHCI_P_FBS 0x40
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/* Just to be sure, if building as module. */
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#if MAXPHYS < 512 * 1024
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#undef MAXPHYS
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#define MAXPHYS 512 * 1024
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#endif
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/* Pessimistic prognosis on number of required S/G entries */
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#define AHCI_SG_ENTRIES (roundup(btoc(MAXPHYS) + 1, 8))
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/* Command list. 32 commands. First, 1Kbyte aligned. */
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#define AHCI_CL_OFFSET 0
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#define AHCI_CL_SIZE 32
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/* Command tables. Up to 32 commands, Each, 128byte aligned. */
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#define AHCI_CT_OFFSET (AHCI_CL_OFFSET + AHCI_CL_SIZE * AHCI_MAX_SLOTS)
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#define AHCI_CT_SIZE (128 + AHCI_SG_ENTRIES * 16)
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/* Total main work area. */
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#define AHCI_WORK_SIZE (AHCI_CT_OFFSET + AHCI_CT_SIZE * ch->numslots)
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struct ahci_dma_prd {
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u_int64_t dba;
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u_int32_t reserved;
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u_int32_t dbc; /* 0 based */
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#define AHCI_PRD_MASK 0x003fffff /* max 4MB */
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#define AHCI_PRD_MAX (AHCI_PRD_MASK + 1)
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#define AHCI_PRD_IPC (1 << 31)
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} __packed;
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struct ahci_cmd_tab {
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u_int8_t cfis[64];
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u_int8_t acmd[32];
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u_int8_t reserved[32];
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struct ahci_dma_prd prd_tab[AHCI_SG_ENTRIES];
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} __packed;
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struct ahci_cmd_list {
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u_int16_t cmd_flags;
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#define AHCI_CMD_ATAPI 0x0020
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#define AHCI_CMD_WRITE 0x0040
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#define AHCI_CMD_PREFETCH 0x0080
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#define AHCI_CMD_RESET 0x0100
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#define AHCI_CMD_BIST 0x0200
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#define AHCI_CMD_CLR_BUSY 0x0400
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u_int16_t prd_length; /* PRD entries */
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u_int32_t bytecount;
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u_int64_t cmd_table_phys; /* 128byte aligned */
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} __packed;
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/* misc defines */
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#define ATA_IRQ_RID 0
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#define ATA_INTR_FLAGS (INTR_MPSAFE|INTR_TYPE_BIO|INTR_ENTROPY)
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struct ata_dmaslot {
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bus_dmamap_t data_map; /* data DMA map */
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int nsegs; /* Number of segs loaded */
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};
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/* structure holding DMA related information */
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struct ata_dma {
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bus_dma_tag_t work_tag; /* workspace DMA tag */
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bus_dmamap_t work_map; /* workspace DMA map */
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uint8_t *work; /* workspace */
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bus_addr_t work_bus; /* bus address of work */
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bus_dma_tag_t rfis_tag; /* RFIS list DMA tag */
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bus_dmamap_t rfis_map; /* RFIS list DMA map */
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uint8_t *rfis; /* FIS receive area */
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bus_addr_t rfis_bus; /* bus address of rfis */
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bus_dma_tag_t data_tag; /* data DMA tag */
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u_int64_t max_address; /* highest DMA'able address */
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};
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enum ahci_slot_states {
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AHCI_SLOT_EMPTY,
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AHCI_SLOT_LOADING,
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AHCI_SLOT_RUNNING,
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AHCI_SLOT_WAITING
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};
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struct ahci_slot {
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device_t dev; /* Device handle */
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u_int8_t slot; /* Number of this slot */
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enum ahci_slot_states state; /* Slot state */
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union ccb *ccb; /* CCB occupying slot */
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struct ata_dmaslot dma; /* DMA data of this slot */
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struct callout timeout; /* Execution timeout */
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};
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/* structure describing an ATA channel */
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struct ahci_channel {
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device_t dev; /* Device handle */
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int unit; /* Physical channel */
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struct resource *r_mem; /* Memory of this channel */
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struct resource *r_irq; /* Interrupt of this channel */
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void *ih; /* Interrupt handle */
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struct ata_dma dma; /* DMA data */
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struct cam_sim *sim;
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struct cam_path *path;
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uint32_t caps; /* Controller capabilities */
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int numslots; /* Number of present slots */
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int pm_level; /* power management level */
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int sata_rev; /* Maximum allowed SATA generation */
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struct ahci_slot slot[AHCI_MAX_SLOTS];
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union ccb *hold[AHCI_MAX_SLOTS];
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struct mtx mtx; /* state lock */
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int devices; /* What is present */
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int pm_present; /* PM presence reported */
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uint32_t rslots; /* Running slots */
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uint32_t aslots; /* Slots with atomic commands */
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int numrslots; /* Number of running slots */
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int numtslots; /* Number of tagged slots */
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int readlog; /* Our READ LOG active */
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int lastslot; /* Last used slot */
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int taggedtarget; /* Last tagged target */
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union ccb *frozen; /* Frozen command */
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};
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/* structure describing a AHCI controller */
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struct ahci_controller {
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device_t dev;
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int r_rid;
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struct resource *r_mem;
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struct rman sc_iomem;
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struct ahci_controller_irq {
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struct ahci_controller *ctlr;
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struct resource *r_irq;
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void *handle;
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int r_irq_rid;
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int mode;
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#define AHCI_IRQ_MODE_ALL 0
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#define AHCI_IRQ_MODE_AFTER 1
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#define AHCI_IRQ_MODE_ONE 2
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} irqs[16];
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int numirqs;
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int channels;
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int ichannels;
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struct {
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void (*function)(void *);
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void *argument;
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} interrupt[AHCI_MAX_PORTS];
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};
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enum ahci_err_type {
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AHCI_ERR_NONE, /* No error */
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AHCI_ERR_INVALID, /* Error detected by us before submitting. */
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AHCI_ERR_INNOCENT, /* Innocent victim. */
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AHCI_ERR_TFE, /* Task File Error. */
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AHCI_ERR_SATA, /* SATA error. */
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AHCI_ERR_TIMEOUT, /* Command execution timeout. */
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AHCI_ERR_NCQ, /* NCQ command error. CCB should be put on hold
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* until READ LOG executed to reveal error. */
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};
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/* macros to hide busspace uglyness */
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#define ATA_INB(res, offset) \
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bus_read_1((res), (offset))
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#define ATA_INW(res, offset) \
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bus_read_2((res), (offset))
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#define ATA_INL(res, offset) \
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bus_read_4((res), (offset))
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#define ATA_INSW(res, offset, addr, count) \
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bus_read_multi_2((res), (offset), (addr), (count))
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#define ATA_INSW_STRM(res, offset, addr, count) \
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bus_read_multi_stream_2((res), (offset), (addr), (count))
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#define ATA_INSL(res, offset, addr, count) \
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bus_read_multi_4((res), (offset), (addr), (count))
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#define ATA_INSL_STRM(res, offset, addr, count) \
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bus_read_multi_stream_4((res), (offset), (addr), (count))
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#define ATA_OUTB(res, offset, value) \
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bus_write_1((res), (offset), (value))
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#define ATA_OUTW(res, offset, value) \
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bus_write_2((res), (offset), (value))
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#define ATA_OUTL(res, offset, value) \
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bus_write_4((res), (offset), (value))
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#define ATA_OUTSW(res, offset, addr, count) \
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bus_write_multi_2((res), (offset), (addr), (count))
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#define ATA_OUTSW_STRM(res, offset, addr, count) \
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bus_write_multi_stream_2((res), (offset), (addr), (count))
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#define ATA_OUTSL(res, offset, addr, count) \
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bus_write_multi_4((res), (offset), (addr), (count))
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#define ATA_OUTSL_STRM(res, offset, addr, count) \
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bus_write_multi_stream_4((res), (offset), (addr), (count))
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