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1116 lines
29 KiB
C
1116 lines
29 KiB
C
/*
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* ahci.c - AHCI SATA support
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*
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* Maintained by: Jeff Garzik <jgarzik@pobox.com>
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* Please ALWAYS copy linux-ide@vger.kernel.org
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* on emails.
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*
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* Copyright 2004-2005 Red Hat, Inc.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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* AHCI hardware documentation:
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* http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
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* http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/dma-mapping.h>
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#include <linux/device.h>
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#include "scsi.h"
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <asm/io.h>
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#define DRV_NAME "ahci"
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#define DRV_VERSION "1.01"
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enum {
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AHCI_PCI_BAR = 5,
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AHCI_MAX_SG = 168, /* hardware max is 64K */
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AHCI_DMA_BOUNDARY = 0xffffffff,
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AHCI_USE_CLUSTERING = 0,
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AHCI_CMD_SLOT_SZ = 32 * 32,
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AHCI_RX_FIS_SZ = 256,
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AHCI_CMD_TBL_HDR = 0x80,
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AHCI_CMD_TBL_CDB = 0x40,
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AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16),
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AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
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AHCI_RX_FIS_SZ,
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AHCI_IRQ_ON_SG = (1 << 31),
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AHCI_CMD_ATAPI = (1 << 5),
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AHCI_CMD_WRITE = (1 << 6),
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RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
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board_ahci = 0,
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/* global controller registers */
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HOST_CAP = 0x00, /* host capabilities */
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HOST_CTL = 0x04, /* global host control */
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HOST_IRQ_STAT = 0x08, /* interrupt status */
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HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
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HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
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/* HOST_CTL bits */
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HOST_RESET = (1 << 0), /* reset controller; self-clear */
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HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
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HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
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/* HOST_CAP bits */
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HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
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/* registers for each SATA port */
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PORT_LST_ADDR = 0x00, /* command list DMA addr */
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PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
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PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
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PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
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PORT_IRQ_STAT = 0x10, /* interrupt status */
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PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
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PORT_CMD = 0x18, /* port command */
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PORT_TFDATA = 0x20, /* taskfile data */
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PORT_SIG = 0x24, /* device TF signature */
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PORT_CMD_ISSUE = 0x38, /* command issue */
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PORT_SCR = 0x28, /* SATA phy register block */
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PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
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PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
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PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
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PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
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/* PORT_IRQ_{STAT,MASK} bits */
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PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
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PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
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PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
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PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
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PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
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PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
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PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
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PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
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PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
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PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
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PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
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PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
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PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
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PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
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PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
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PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
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PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
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PORT_IRQ_FATAL = PORT_IRQ_TF_ERR |
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PORT_IRQ_HBUS_ERR |
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PORT_IRQ_HBUS_DATA_ERR |
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PORT_IRQ_IF_ERR,
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DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY |
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PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE |
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PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS |
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PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS |
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PORT_IRQ_D2H_REG_FIS,
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/* PORT_CMD bits */
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PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
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PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
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PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
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PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
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PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
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PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
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PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
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PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
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PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
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/* hpriv->flags bits */
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AHCI_FLAG_MSI = (1 << 0),
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};
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struct ahci_cmd_hdr {
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u32 opts;
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u32 status;
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u32 tbl_addr;
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u32 tbl_addr_hi;
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u32 reserved[4];
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};
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struct ahci_sg {
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u32 addr;
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u32 addr_hi;
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u32 reserved;
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u32 flags_size;
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};
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struct ahci_host_priv {
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unsigned long flags;
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u32 cap; /* cache of HOST_CAP register */
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u32 port_map; /* cache of HOST_PORTS_IMPL reg */
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};
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struct ahci_port_priv {
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struct ahci_cmd_hdr *cmd_slot;
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dma_addr_t cmd_slot_dma;
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void *cmd_tbl;
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dma_addr_t cmd_tbl_dma;
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struct ahci_sg *cmd_tbl_sg;
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void *rx_fis;
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dma_addr_t rx_fis_dma;
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};
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static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
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static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
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static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
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static int ahci_qc_issue(struct ata_queued_cmd *qc);
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static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
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static void ahci_phy_reset(struct ata_port *ap);
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static void ahci_irq_clear(struct ata_port *ap);
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static void ahci_eng_timeout(struct ata_port *ap);
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static int ahci_port_start(struct ata_port *ap);
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static void ahci_port_stop(struct ata_port *ap);
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static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
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static void ahci_qc_prep(struct ata_queued_cmd *qc);
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static u8 ahci_check_status(struct ata_port *ap);
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static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
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static void ahci_remove_one (struct pci_dev *pdev);
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static struct scsi_host_template ahci_sht = {
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.module = THIS_MODULE,
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.name = DRV_NAME,
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.ioctl = ata_scsi_ioctl,
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.queuecommand = ata_scsi_queuecmd,
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.eh_strategy_handler = ata_scsi_error,
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.can_queue = ATA_DEF_QUEUE,
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.this_id = ATA_SHT_THIS_ID,
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.sg_tablesize = AHCI_MAX_SG,
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.max_sectors = ATA_MAX_SECTORS,
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.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
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.emulated = ATA_SHT_EMULATED,
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.use_clustering = AHCI_USE_CLUSTERING,
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.proc_name = DRV_NAME,
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.dma_boundary = AHCI_DMA_BOUNDARY,
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.slave_configure = ata_scsi_slave_config,
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.bios_param = ata_std_bios_param,
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.ordered_flush = 1,
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};
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static const struct ata_port_operations ahci_ops = {
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.port_disable = ata_port_disable,
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.check_status = ahci_check_status,
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.check_altstatus = ahci_check_status,
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.dev_select = ata_noop_dev_select,
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.tf_read = ahci_tf_read,
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.phy_reset = ahci_phy_reset,
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.qc_prep = ahci_qc_prep,
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.qc_issue = ahci_qc_issue,
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.eng_timeout = ahci_eng_timeout,
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.irq_handler = ahci_interrupt,
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.irq_clear = ahci_irq_clear,
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.scr_read = ahci_scr_read,
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.scr_write = ahci_scr_write,
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.port_start = ahci_port_start,
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.port_stop = ahci_port_stop,
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};
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static struct ata_port_info ahci_port_info[] = {
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/* board_ahci */
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{
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.sht = &ahci_sht,
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.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
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ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
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ATA_FLAG_PIO_DMA,
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.pio_mask = 0x1f, /* pio0-4 */
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.udma_mask = 0x7f, /* udma0-6 ; FIXME */
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.port_ops = &ahci_ops,
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},
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};
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static struct pci_device_id ahci_pci_tbl[] = {
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{ PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ICH6 */
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{ PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ICH6M */
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{ PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ICH7 */
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{ PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ICH7M */
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{ PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ICH7R */
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{ PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ULi M5288 */
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{ PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ESB2 */
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{ PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ESB2 */
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{ PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ESB2 */
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{ PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
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board_ahci }, /* ICH7-M DH */
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{ } /* terminate list */
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};
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static struct pci_driver ahci_pci_driver = {
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.name = DRV_NAME,
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.id_table = ahci_pci_tbl,
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.probe = ahci_init_one,
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.remove = ahci_remove_one,
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};
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static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
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{
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return base + 0x100 + (port * 0x80);
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}
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static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
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{
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return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
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}
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static int ahci_port_start(struct ata_port *ap)
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{
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struct device *dev = ap->host_set->dev;
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struct ahci_host_priv *hpriv = ap->host_set->private_data;
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struct ahci_port_priv *pp;
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void __iomem *mmio = ap->host_set->mmio_base;
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void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
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void *mem;
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dma_addr_t mem_dma;
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int rc;
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pp = kmalloc(sizeof(*pp), GFP_KERNEL);
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if (!pp)
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return -ENOMEM;
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memset(pp, 0, sizeof(*pp));
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rc = ata_pad_alloc(ap, dev);
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if (rc) {
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kfree(pp);
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return rc;
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}
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mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
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if (!mem) {
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ata_pad_free(ap, dev);
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kfree(pp);
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return -ENOMEM;
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}
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memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
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/*
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* First item in chunk of DMA memory: 32-slot command table,
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* 32 bytes each in size
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*/
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pp->cmd_slot = mem;
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pp->cmd_slot_dma = mem_dma;
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mem += AHCI_CMD_SLOT_SZ;
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mem_dma += AHCI_CMD_SLOT_SZ;
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/*
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* Second item: Received-FIS area
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*/
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pp->rx_fis = mem;
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pp->rx_fis_dma = mem_dma;
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mem += AHCI_RX_FIS_SZ;
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mem_dma += AHCI_RX_FIS_SZ;
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/*
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* Third item: data area for storing a single command
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* and its scatter-gather table
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*/
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pp->cmd_tbl = mem;
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pp->cmd_tbl_dma = mem_dma;
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pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
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ap->private_data = pp;
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if (hpriv->cap & HOST_CAP_64)
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writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
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writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
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readl(port_mmio + PORT_LST_ADDR); /* flush */
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if (hpriv->cap & HOST_CAP_64)
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writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
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writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
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readl(port_mmio + PORT_FIS_ADDR); /* flush */
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writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
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PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
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PORT_CMD_START, port_mmio + PORT_CMD);
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readl(port_mmio + PORT_CMD); /* flush */
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return 0;
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}
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static void ahci_port_stop(struct ata_port *ap)
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{
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struct device *dev = ap->host_set->dev;
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struct ahci_port_priv *pp = ap->private_data;
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void __iomem *mmio = ap->host_set->mmio_base;
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void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
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u32 tmp;
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tmp = readl(port_mmio + PORT_CMD);
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tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
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writel(tmp, port_mmio + PORT_CMD);
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readl(port_mmio + PORT_CMD); /* flush */
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/* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
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* this is slightly incorrect.
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*/
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msleep(500);
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ap->private_data = NULL;
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dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
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pp->cmd_slot, pp->cmd_slot_dma);
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ata_pad_free(ap, dev);
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kfree(pp);
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}
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static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
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{
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unsigned int sc_reg;
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switch (sc_reg_in) {
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case SCR_STATUS: sc_reg = 0; break;
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case SCR_CONTROL: sc_reg = 1; break;
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case SCR_ERROR: sc_reg = 2; break;
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case SCR_ACTIVE: sc_reg = 3; break;
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default:
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return 0xffffffffU;
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}
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return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
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}
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static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
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u32 val)
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{
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unsigned int sc_reg;
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switch (sc_reg_in) {
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case SCR_STATUS: sc_reg = 0; break;
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case SCR_CONTROL: sc_reg = 1; break;
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case SCR_ERROR: sc_reg = 2; break;
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case SCR_ACTIVE: sc_reg = 3; break;
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default:
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return;
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}
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|
|
writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
|
|
}
|
|
|
|
static void ahci_phy_reset(struct ata_port *ap)
|
|
{
|
|
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
|
|
struct ata_taskfile tf;
|
|
struct ata_device *dev = &ap->device[0];
|
|
u32 tmp;
|
|
|
|
__sata_phy_reset(ap);
|
|
|
|
if (ap->flags & ATA_FLAG_PORT_DISABLED)
|
|
return;
|
|
|
|
tmp = readl(port_mmio + PORT_SIG);
|
|
tf.lbah = (tmp >> 24) & 0xff;
|
|
tf.lbam = (tmp >> 16) & 0xff;
|
|
tf.lbal = (tmp >> 8) & 0xff;
|
|
tf.nsect = (tmp) & 0xff;
|
|
|
|
dev->class = ata_dev_classify(&tf);
|
|
if (!ata_dev_present(dev))
|
|
ata_port_disable(ap);
|
|
}
|
|
|
|
static u8 ahci_check_status(struct ata_port *ap)
|
|
{
|
|
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
|
|
|
|
return readl(mmio + PORT_TFDATA) & 0xFF;
|
|
}
|
|
|
|
static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
|
|
{
|
|
struct ahci_port_priv *pp = ap->private_data;
|
|
u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
|
|
|
|
ata_tf_from_fis(d2h_fis, tf);
|
|
}
|
|
|
|
static void ahci_fill_sg(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ahci_port_priv *pp = qc->ap->private_data;
|
|
struct scatterlist *sg;
|
|
struct ahci_sg *ahci_sg;
|
|
|
|
VPRINTK("ENTER\n");
|
|
|
|
/*
|
|
* Next, the S/G list.
|
|
*/
|
|
ahci_sg = pp->cmd_tbl_sg;
|
|
ata_for_each_sg(sg, qc) {
|
|
dma_addr_t addr = sg_dma_address(sg);
|
|
u32 sg_len = sg_dma_len(sg);
|
|
|
|
ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
|
|
ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
|
|
ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
|
|
ahci_sg++;
|
|
}
|
|
}
|
|
|
|
static void ahci_qc_prep(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct ahci_port_priv *pp = ap->private_data;
|
|
u32 opts;
|
|
const u32 cmd_fis_len = 5; /* five dwords */
|
|
|
|
/*
|
|
* Fill in command slot information (currently only one slot,
|
|
* slot 0, is currently since we don't do queueing)
|
|
*/
|
|
|
|
opts = (qc->n_elem << 16) | cmd_fis_len;
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE)
|
|
opts |= AHCI_CMD_WRITE;
|
|
if (is_atapi_taskfile(&qc->tf))
|
|
opts |= AHCI_CMD_ATAPI;
|
|
|
|
pp->cmd_slot[0].opts = cpu_to_le32(opts);
|
|
pp->cmd_slot[0].status = 0;
|
|
pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
|
|
pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
|
|
|
|
/*
|
|
* Fill in command table information. First, the header,
|
|
* a SATA Register - Host to Device command FIS.
|
|
*/
|
|
ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
|
|
if (opts & AHCI_CMD_ATAPI) {
|
|
memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
|
|
memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
|
|
}
|
|
|
|
if (!(qc->flags & ATA_QCFLAG_DMAMAP))
|
|
return;
|
|
|
|
ahci_fill_sg(qc);
|
|
}
|
|
|
|
static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
|
|
{
|
|
void __iomem *mmio = ap->host_set->mmio_base;
|
|
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
|
|
u32 tmp;
|
|
int work;
|
|
|
|
/* stop DMA */
|
|
tmp = readl(port_mmio + PORT_CMD);
|
|
tmp &= ~PORT_CMD_START;
|
|
writel(tmp, port_mmio + PORT_CMD);
|
|
|
|
/* wait for engine to stop. TODO: this could be
|
|
* as long as 500 msec
|
|
*/
|
|
work = 1000;
|
|
while (work-- > 0) {
|
|
tmp = readl(port_mmio + PORT_CMD);
|
|
if ((tmp & PORT_CMD_LIST_ON) == 0)
|
|
break;
|
|
udelay(10);
|
|
}
|
|
|
|
/* clear SATA phy error, if any */
|
|
tmp = readl(port_mmio + PORT_SCR_ERR);
|
|
writel(tmp, port_mmio + PORT_SCR_ERR);
|
|
|
|
/* if DRQ/BSY is set, device needs to be reset.
|
|
* if so, issue COMRESET
|
|
*/
|
|
tmp = readl(port_mmio + PORT_TFDATA);
|
|
if (tmp & (ATA_BUSY | ATA_DRQ)) {
|
|
writel(0x301, port_mmio + PORT_SCR_CTL);
|
|
readl(port_mmio + PORT_SCR_CTL); /* flush */
|
|
udelay(10);
|
|
writel(0x300, port_mmio + PORT_SCR_CTL);
|
|
readl(port_mmio + PORT_SCR_CTL); /* flush */
|
|
}
|
|
|
|
/* re-start DMA */
|
|
tmp = readl(port_mmio + PORT_CMD);
|
|
tmp |= PORT_CMD_START;
|
|
writel(tmp, port_mmio + PORT_CMD);
|
|
readl(port_mmio + PORT_CMD); /* flush */
|
|
|
|
printk(KERN_WARNING "ata%u: error occurred, port reset\n", ap->id);
|
|
}
|
|
|
|
static void ahci_eng_timeout(struct ata_port *ap)
|
|
{
|
|
struct ata_host_set *host_set = ap->host_set;
|
|
void __iomem *mmio = host_set->mmio_base;
|
|
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
|
|
struct ata_queued_cmd *qc;
|
|
unsigned long flags;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
spin_lock_irqsave(&host_set->lock, flags);
|
|
|
|
ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
|
|
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
if (!qc) {
|
|
printk(KERN_ERR "ata%u: BUG: timeout without command\n",
|
|
ap->id);
|
|
} else {
|
|
/* hack alert! We cannot use the supplied completion
|
|
* function from inside the ->eh_strategy_handler() thread.
|
|
* libata is the only user of ->eh_strategy_handler() in
|
|
* any kernel, so the default scsi_done() assumes it is
|
|
* not being called from the SCSI EH.
|
|
*/
|
|
qc->scsidone = scsi_finish_command;
|
|
ata_qc_complete(qc, AC_ERR_OTHER);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&host_set->lock, flags);
|
|
}
|
|
|
|
static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
|
|
{
|
|
void __iomem *mmio = ap->host_set->mmio_base;
|
|
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
|
|
u32 status, serr, ci;
|
|
|
|
serr = readl(port_mmio + PORT_SCR_ERR);
|
|
writel(serr, port_mmio + PORT_SCR_ERR);
|
|
|
|
status = readl(port_mmio + PORT_IRQ_STAT);
|
|
writel(status, port_mmio + PORT_IRQ_STAT);
|
|
|
|
ci = readl(port_mmio + PORT_CMD_ISSUE);
|
|
if (likely((ci & 0x1) == 0)) {
|
|
if (qc) {
|
|
ata_qc_complete(qc, 0);
|
|
qc = NULL;
|
|
}
|
|
}
|
|
|
|
if (status & PORT_IRQ_FATAL) {
|
|
ahci_intr_error(ap, status);
|
|
if (qc)
|
|
ata_qc_complete(qc, AC_ERR_OTHER);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void ahci_irq_clear(struct ata_port *ap)
|
|
{
|
|
/* TODO */
|
|
}
|
|
|
|
static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
|
|
{
|
|
struct ata_host_set *host_set = dev_instance;
|
|
struct ahci_host_priv *hpriv;
|
|
unsigned int i, handled = 0;
|
|
void __iomem *mmio;
|
|
u32 irq_stat, irq_ack = 0;
|
|
|
|
VPRINTK("ENTER\n");
|
|
|
|
hpriv = host_set->private_data;
|
|
mmio = host_set->mmio_base;
|
|
|
|
/* sigh. 0xffffffff is a valid return from h/w */
|
|
irq_stat = readl(mmio + HOST_IRQ_STAT);
|
|
irq_stat &= hpriv->port_map;
|
|
if (!irq_stat)
|
|
return IRQ_NONE;
|
|
|
|
spin_lock(&host_set->lock);
|
|
|
|
for (i = 0; i < host_set->n_ports; i++) {
|
|
struct ata_port *ap;
|
|
|
|
if (!(irq_stat & (1 << i)))
|
|
continue;
|
|
|
|
ap = host_set->ports[i];
|
|
if (ap) {
|
|
struct ata_queued_cmd *qc;
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
if (!ahci_host_intr(ap, qc))
|
|
if (ata_ratelimit()) {
|
|
struct pci_dev *pdev =
|
|
to_pci_dev(ap->host_set->dev);
|
|
dev_printk(KERN_WARNING, &pdev->dev,
|
|
"unhandled interrupt on port %u\n",
|
|
i);
|
|
}
|
|
|
|
VPRINTK("port %u\n", i);
|
|
} else {
|
|
VPRINTK("port %u (no irq)\n", i);
|
|
if (ata_ratelimit()) {
|
|
struct pci_dev *pdev =
|
|
to_pci_dev(ap->host_set->dev);
|
|
dev_printk(KERN_WARNING, &pdev->dev,
|
|
"interrupt on disabled port %u\n", i);
|
|
}
|
|
}
|
|
|
|
irq_ack |= (1 << i);
|
|
}
|
|
|
|
if (irq_ack) {
|
|
writel(irq_ack, mmio + HOST_IRQ_STAT);
|
|
handled = 1;
|
|
}
|
|
|
|
spin_unlock(&host_set->lock);
|
|
|
|
VPRINTK("EXIT\n");
|
|
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
static int ahci_qc_issue(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
|
|
|
|
writel(1, port_mmio + PORT_CMD_ISSUE);
|
|
readl(port_mmio + PORT_CMD_ISSUE); /* flush */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
|
|
unsigned int port_idx)
|
|
{
|
|
VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
|
|
base = ahci_port_base_ul(base, port_idx);
|
|
VPRINTK("base now==0x%lx\n", base);
|
|
|
|
port->cmd_addr = base;
|
|
port->scr_addr = base + PORT_SCR;
|
|
|
|
VPRINTK("EXIT\n");
|
|
}
|
|
|
|
static int ahci_host_init(struct ata_probe_ent *probe_ent)
|
|
{
|
|
struct ahci_host_priv *hpriv = probe_ent->private_data;
|
|
struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
|
|
void __iomem *mmio = probe_ent->mmio_base;
|
|
u32 tmp, cap_save;
|
|
u16 tmp16;
|
|
unsigned int i, j, using_dac;
|
|
int rc;
|
|
void __iomem *port_mmio;
|
|
|
|
cap_save = readl(mmio + HOST_CAP);
|
|
cap_save &= ( (1<<28) | (1<<17) );
|
|
cap_save |= (1 << 27);
|
|
|
|
/* global controller reset */
|
|
tmp = readl(mmio + HOST_CTL);
|
|
if ((tmp & HOST_RESET) == 0) {
|
|
writel(tmp | HOST_RESET, mmio + HOST_CTL);
|
|
readl(mmio + HOST_CTL); /* flush */
|
|
}
|
|
|
|
/* reset must complete within 1 second, or
|
|
* the hardware should be considered fried.
|
|
*/
|
|
ssleep(1);
|
|
|
|
tmp = readl(mmio + HOST_CTL);
|
|
if (tmp & HOST_RESET) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"controller reset failed (0x%x)\n", tmp);
|
|
return -EIO;
|
|
}
|
|
|
|
writel(HOST_AHCI_EN, mmio + HOST_CTL);
|
|
(void) readl(mmio + HOST_CTL); /* flush */
|
|
writel(cap_save, mmio + HOST_CAP);
|
|
writel(0xf, mmio + HOST_PORTS_IMPL);
|
|
(void) readl(mmio + HOST_PORTS_IMPL); /* flush */
|
|
|
|
pci_read_config_word(pdev, 0x92, &tmp16);
|
|
tmp16 |= 0xf;
|
|
pci_write_config_word(pdev, 0x92, tmp16);
|
|
|
|
hpriv->cap = readl(mmio + HOST_CAP);
|
|
hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
|
|
probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
|
|
|
|
VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
|
|
hpriv->cap, hpriv->port_map, probe_ent->n_ports);
|
|
|
|
using_dac = hpriv->cap & HOST_CAP_64;
|
|
if (using_dac &&
|
|
!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
|
|
if (rc) {
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
|
|
if (rc) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"64-bit DMA enable failed\n");
|
|
return rc;
|
|
}
|
|
}
|
|
} else {
|
|
rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
|
|
if (rc) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"32-bit DMA enable failed\n");
|
|
return rc;
|
|
}
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
|
|
if (rc) {
|
|
dev_printk(KERN_ERR, &pdev->dev,
|
|
"32-bit consistent DMA enable failed\n");
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < probe_ent->n_ports; i++) {
|
|
#if 0 /* BIOSen initialize this incorrectly */
|
|
if (!(hpriv->port_map & (1 << i)))
|
|
continue;
|
|
#endif
|
|
|
|
port_mmio = ahci_port_base(mmio, i);
|
|
VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
|
|
|
|
ahci_setup_port(&probe_ent->port[i],
|
|
(unsigned long) mmio, i);
|
|
|
|
/* make sure port is not active */
|
|
tmp = readl(port_mmio + PORT_CMD);
|
|
VPRINTK("PORT_CMD 0x%x\n", tmp);
|
|
if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
|
|
PORT_CMD_FIS_RX | PORT_CMD_START)) {
|
|
tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
|
|
PORT_CMD_FIS_RX | PORT_CMD_START);
|
|
writel(tmp, port_mmio + PORT_CMD);
|
|
readl(port_mmio + PORT_CMD); /* flush */
|
|
|
|
/* spec says 500 msecs for each bit, so
|
|
* this is slightly incorrect.
|
|
*/
|
|
msleep(500);
|
|
}
|
|
|
|
writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
|
|
|
|
j = 0;
|
|
while (j < 100) {
|
|
msleep(10);
|
|
tmp = readl(port_mmio + PORT_SCR_STAT);
|
|
if ((tmp & 0xf) == 0x3)
|
|
break;
|
|
j++;
|
|
}
|
|
|
|
tmp = readl(port_mmio + PORT_SCR_ERR);
|
|
VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
|
|
writel(tmp, port_mmio + PORT_SCR_ERR);
|
|
|
|
/* ack any pending irq events for this port */
|
|
tmp = readl(port_mmio + PORT_IRQ_STAT);
|
|
VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
|
|
if (tmp)
|
|
writel(tmp, port_mmio + PORT_IRQ_STAT);
|
|
|
|
writel(1 << i, mmio + HOST_IRQ_STAT);
|
|
|
|
/* set irq mask (enables interrupts) */
|
|
writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
|
|
}
|
|
|
|
tmp = readl(mmio + HOST_CTL);
|
|
VPRINTK("HOST_CTL 0x%x\n", tmp);
|
|
writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
|
|
tmp = readl(mmio + HOST_CTL);
|
|
VPRINTK("HOST_CTL 0x%x\n", tmp);
|
|
|
|
pci_set_master(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ahci_print_info(struct ata_probe_ent *probe_ent)
|
|
{
|
|
struct ahci_host_priv *hpriv = probe_ent->private_data;
|
|
struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
|
|
void __iomem *mmio = probe_ent->mmio_base;
|
|
u32 vers, cap, impl, speed;
|
|
const char *speed_s;
|
|
u16 cc;
|
|
const char *scc_s;
|
|
|
|
vers = readl(mmio + HOST_VERSION);
|
|
cap = hpriv->cap;
|
|
impl = hpriv->port_map;
|
|
|
|
speed = (cap >> 20) & 0xf;
|
|
if (speed == 1)
|
|
speed_s = "1.5";
|
|
else if (speed == 2)
|
|
speed_s = "3";
|
|
else
|
|
speed_s = "?";
|
|
|
|
pci_read_config_word(pdev, 0x0a, &cc);
|
|
if (cc == 0x0101)
|
|
scc_s = "IDE";
|
|
else if (cc == 0x0106)
|
|
scc_s = "SATA";
|
|
else if (cc == 0x0104)
|
|
scc_s = "RAID";
|
|
else
|
|
scc_s = "unknown";
|
|
|
|
dev_printk(KERN_INFO, &pdev->dev,
|
|
"AHCI %02x%02x.%02x%02x "
|
|
"%u slots %u ports %s Gbps 0x%x impl %s mode\n"
|
|
,
|
|
|
|
(vers >> 24) & 0xff,
|
|
(vers >> 16) & 0xff,
|
|
(vers >> 8) & 0xff,
|
|
vers & 0xff,
|
|
|
|
((cap >> 8) & 0x1f) + 1,
|
|
(cap & 0x1f) + 1,
|
|
speed_s,
|
|
impl,
|
|
scc_s);
|
|
|
|
dev_printk(KERN_INFO, &pdev->dev,
|
|
"flags: "
|
|
"%s%s%s%s%s%s"
|
|
"%s%s%s%s%s%s%s\n"
|
|
,
|
|
|
|
cap & (1 << 31) ? "64bit " : "",
|
|
cap & (1 << 30) ? "ncq " : "",
|
|
cap & (1 << 28) ? "ilck " : "",
|
|
cap & (1 << 27) ? "stag " : "",
|
|
cap & (1 << 26) ? "pm " : "",
|
|
cap & (1 << 25) ? "led " : "",
|
|
|
|
cap & (1 << 24) ? "clo " : "",
|
|
cap & (1 << 19) ? "nz " : "",
|
|
cap & (1 << 18) ? "only " : "",
|
|
cap & (1 << 17) ? "pmp " : "",
|
|
cap & (1 << 15) ? "pio " : "",
|
|
cap & (1 << 14) ? "slum " : "",
|
|
cap & (1 << 13) ? "part " : ""
|
|
);
|
|
}
|
|
|
|
static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
static int printed_version;
|
|
struct ata_probe_ent *probe_ent = NULL;
|
|
struct ahci_host_priv *hpriv;
|
|
unsigned long base;
|
|
void __iomem *mmio_base;
|
|
unsigned int board_idx = (unsigned int) ent->driver_data;
|
|
int have_msi, pci_dev_busy = 0;
|
|
int rc;
|
|
|
|
VPRINTK("ENTER\n");
|
|
|
|
if (!printed_version++)
|
|
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
|
|
|
|
rc = pci_enable_device(pdev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = pci_request_regions(pdev, DRV_NAME);
|
|
if (rc) {
|
|
pci_dev_busy = 1;
|
|
goto err_out;
|
|
}
|
|
|
|
if (pci_enable_msi(pdev) == 0)
|
|
have_msi = 1;
|
|
else {
|
|
pci_intx(pdev, 1);
|
|
have_msi = 0;
|
|
}
|
|
|
|
probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
|
|
if (probe_ent == NULL) {
|
|
rc = -ENOMEM;
|
|
goto err_out_msi;
|
|
}
|
|
|
|
memset(probe_ent, 0, sizeof(*probe_ent));
|
|
probe_ent->dev = pci_dev_to_dev(pdev);
|
|
INIT_LIST_HEAD(&probe_ent->node);
|
|
|
|
mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
|
|
if (mmio_base == NULL) {
|
|
rc = -ENOMEM;
|
|
goto err_out_free_ent;
|
|
}
|
|
base = (unsigned long) mmio_base;
|
|
|
|
hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
|
|
if (!hpriv) {
|
|
rc = -ENOMEM;
|
|
goto err_out_iounmap;
|
|
}
|
|
memset(hpriv, 0, sizeof(*hpriv));
|
|
|
|
probe_ent->sht = ahci_port_info[board_idx].sht;
|
|
probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
|
|
probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
|
|
probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
|
|
probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
|
|
|
|
probe_ent->irq = pdev->irq;
|
|
probe_ent->irq_flags = SA_SHIRQ;
|
|
probe_ent->mmio_base = mmio_base;
|
|
probe_ent->private_data = hpriv;
|
|
|
|
if (have_msi)
|
|
hpriv->flags |= AHCI_FLAG_MSI;
|
|
|
|
/* initialize adapter */
|
|
rc = ahci_host_init(probe_ent);
|
|
if (rc)
|
|
goto err_out_hpriv;
|
|
|
|
ahci_print_info(probe_ent);
|
|
|
|
/* FIXME: check ata_device_add return value */
|
|
ata_device_add(probe_ent);
|
|
kfree(probe_ent);
|
|
|
|
return 0;
|
|
|
|
err_out_hpriv:
|
|
kfree(hpriv);
|
|
err_out_iounmap:
|
|
pci_iounmap(pdev, mmio_base);
|
|
err_out_free_ent:
|
|
kfree(probe_ent);
|
|
err_out_msi:
|
|
if (have_msi)
|
|
pci_disable_msi(pdev);
|
|
else
|
|
pci_intx(pdev, 0);
|
|
pci_release_regions(pdev);
|
|
err_out:
|
|
if (!pci_dev_busy)
|
|
pci_disable_device(pdev);
|
|
return rc;
|
|
}
|
|
|
|
static void ahci_remove_one (struct pci_dev *pdev)
|
|
{
|
|
struct device *dev = pci_dev_to_dev(pdev);
|
|
struct ata_host_set *host_set = dev_get_drvdata(dev);
|
|
struct ahci_host_priv *hpriv = host_set->private_data;
|
|
struct ata_port *ap;
|
|
unsigned int i;
|
|
int have_msi;
|
|
|
|
for (i = 0; i < host_set->n_ports; i++) {
|
|
ap = host_set->ports[i];
|
|
|
|
scsi_remove_host(ap->host);
|
|
}
|
|
|
|
have_msi = hpriv->flags & AHCI_FLAG_MSI;
|
|
free_irq(host_set->irq, host_set);
|
|
|
|
for (i = 0; i < host_set->n_ports; i++) {
|
|
ap = host_set->ports[i];
|
|
|
|
ata_scsi_release(ap->host);
|
|
scsi_host_put(ap->host);
|
|
}
|
|
|
|
kfree(hpriv);
|
|
pci_iounmap(pdev, host_set->mmio_base);
|
|
kfree(host_set);
|
|
|
|
if (have_msi)
|
|
pci_disable_msi(pdev);
|
|
else
|
|
pci_intx(pdev, 0);
|
|
pci_release_regions(pdev);
|
|
pci_disable_device(pdev);
|
|
dev_set_drvdata(dev, NULL);
|
|
}
|
|
|
|
static int __init ahci_init(void)
|
|
{
|
|
return pci_module_init(&ahci_pci_driver);
|
|
}
|
|
|
|
static void __exit ahci_exit(void)
|
|
{
|
|
pci_unregister_driver(&ahci_pci_driver);
|
|
}
|
|
|
|
|
|
MODULE_AUTHOR("Jeff Garzik");
|
|
MODULE_DESCRIPTION("AHCI SATA low-level driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|
|
module_init(ahci_init);
|
|
module_exit(ahci_exit);
|