/* * ahci.c - AHCI SATA support * * Copyright 2004 Red Hat, Inc. * * The contents of this file are subject to the Open * Software License version 1.1 that can be found at * http://www.opensource.org/licenses/osl-1.1.txt and is included herein * by reference. * * Alternatively, the contents of this file may be used under the terms * of the GNU General Public License version 2 (the "GPL") as distributed * in the kernel source COPYING file, in which case the provisions of * the GPL are applicable instead of the above. If you wish to allow * the use of your version of this file only under the terms of the * GPL and not to allow others to use your version of this file under * the OSL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the GPL. * If you do not delete the provisions above, a recipient may use your * version of this file under either the OSL or the GPL. * * Version 1.0 of the AHCI specification: * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/sched.h> #include <linux/dma-mapping.h> #include "scsi.h" #include <scsi/scsi_host.h> #include <linux/libata.h> #include <asm/io.h> #define DRV_NAME "ahci" #define DRV_VERSION "1.01" enum { AHCI_PCI_BAR = 5, AHCI_MAX_SG = 168, /* hardware max is 64K */ AHCI_DMA_BOUNDARY = 0xffffffff, AHCI_USE_CLUSTERING = 0, AHCI_CMD_SLOT_SZ = 32 * 32, AHCI_RX_FIS_SZ = 256, AHCI_CMD_TBL_HDR = 0x80, AHCI_CMD_TBL_CDB = 0x40, AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16), AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ + AHCI_RX_FIS_SZ, AHCI_IRQ_ON_SG = (1 << 31), AHCI_CMD_ATAPI = (1 << 5), AHCI_CMD_WRITE = (1 << 6), RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */ board_ahci = 0, /* global controller registers */ HOST_CAP = 0x00, /* host capabilities */ HOST_CTL = 0x04, /* global host control */ HOST_IRQ_STAT = 0x08, /* interrupt status */ HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */ HOST_VERSION = 0x10, /* AHCI spec. version compliancy */ /* HOST_CTL bits */ HOST_RESET = (1 << 0), /* reset controller; self-clear */ HOST_IRQ_EN = (1 << 1), /* global IRQ enable */ HOST_AHCI_EN = (1 << 31), /* AHCI enabled */ /* HOST_CAP bits */ HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */ /* registers for each SATA port */ PORT_LST_ADDR = 0x00, /* command list DMA addr */ PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */ PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */ PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */ PORT_IRQ_STAT = 0x10, /* interrupt status */ PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */ PORT_CMD = 0x18, /* port command */ PORT_TFDATA = 0x20, /* taskfile data */ PORT_SIG = 0x24, /* device TF signature */ PORT_CMD_ISSUE = 0x38, /* command issue */ PORT_SCR = 0x28, /* SATA phy register block */ PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */ PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */ PORT_SCR_ERR = 0x30, /* SATA phy register: SError */ PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */ /* PORT_IRQ_{STAT,MASK} bits */ PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */ PORT_IRQ_TF_ERR = (1 << 30), /* task file error */ PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */ PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */ PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */ PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */ PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */ PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */ PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */ PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */ PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */ PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */ PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */ PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */ PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */ PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */ PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */ PORT_IRQ_FATAL = PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_ERR, DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY | PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE | PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS, /* PORT_CMD bits */ PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */ PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */ PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */ PORT_CMD_POWER_ON = (1 << 2), /* Power up device */ PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */ PORT_CMD_START = (1 << 0), /* Enable port DMA engine */ PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */ PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */ PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */ /* hpriv->flags bits */ AHCI_FLAG_MSI = (1 << 0), }; struct ahci_cmd_hdr { u32 opts; u32 status; u32 tbl_addr; u32 tbl_addr_hi; u32 reserved[4]; }; struct ahci_sg { u32 addr; u32 addr_hi; u32 reserved; u32 flags_size; }; struct ahci_host_priv { unsigned long flags; u32 cap; /* cache of HOST_CAP register */ u32 port_map; /* cache of HOST_PORTS_IMPL reg */ }; struct ahci_port_priv { struct ahci_cmd_hdr *cmd_slot; dma_addr_t cmd_slot_dma; void *cmd_tbl; dma_addr_t cmd_tbl_dma; struct ahci_sg *cmd_tbl_sg; void *rx_fis; dma_addr_t rx_fis_dma; }; static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg); static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); static int ahci_qc_issue(struct ata_queued_cmd *qc); static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs); static void ahci_phy_reset(struct ata_port *ap); static void ahci_irq_clear(struct ata_port *ap); static void ahci_eng_timeout(struct ata_port *ap); static int ahci_port_start(struct ata_port *ap); static void ahci_port_stop(struct ata_port *ap); static void ahci_host_stop(struct ata_host_set *host_set); static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf); static void ahci_qc_prep(struct ata_queued_cmd *qc); static u8 ahci_check_status(struct ata_port *ap); static u8 ahci_check_err(struct ata_port *ap); static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); static void ahci_remove_one (struct pci_dev *pdev); static Scsi_Host_Template ahci_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .eh_strategy_handler = ata_scsi_error, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = AHCI_MAX_SG, .max_sectors = ATA_MAX_SECTORS, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = AHCI_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = AHCI_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .bios_param = ata_std_bios_param, .ordered_flush = 1, }; static struct ata_port_operations ahci_ops = { .port_disable = ata_port_disable, .check_status = ahci_check_status, .check_altstatus = ahci_check_status, .check_err = ahci_check_err, .dev_select = ata_noop_dev_select, .tf_read = ahci_tf_read, .phy_reset = ahci_phy_reset, .qc_prep = ahci_qc_prep, .qc_issue = ahci_qc_issue, .eng_timeout = ahci_eng_timeout, .irq_handler = ahci_interrupt, .irq_clear = ahci_irq_clear, .scr_read = ahci_scr_read, .scr_write = ahci_scr_write, .port_start = ahci_port_start, .port_stop = ahci_port_stop, .host_stop = ahci_host_stop, }; static struct ata_port_info ahci_port_info[] = { /* board_ahci */ { .sht = &ahci_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA, .pio_mask = 0x03, /* pio3-4 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_ops, }, }; static struct pci_device_id ahci_pci_tbl[] = { { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ICH6 */ { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ICH6M */ { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ICH7 */ { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ICH7M */ { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ICH7R */ { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ULi M5288 */ { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ESB2 */ { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ESB2 */ { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ESB2 */ { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ICH7-M DH */ { } /* terminate list */ }; static struct pci_driver ahci_pci_driver = { .name = DRV_NAME, .id_table = ahci_pci_tbl, .probe = ahci_init_one, .remove = ahci_remove_one, }; static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port) { return base + 0x100 + (port * 0x80); } static inline void *ahci_port_base (void *base, unsigned int port) { return (void *) ahci_port_base_ul((unsigned long)base, port); } static void ahci_host_stop(struct ata_host_set *host_set) { struct ahci_host_priv *hpriv = host_set->private_data; kfree(hpriv); ata_host_stop(host_set); } static int ahci_port_start(struct ata_port *ap) { struct device *dev = ap->host_set->dev; struct ahci_host_priv *hpriv = ap->host_set->private_data; struct ahci_port_priv *pp; void *mem, *mmio = ap->host_set->mmio_base; void *port_mmio = ahci_port_base(mmio, ap->port_no); dma_addr_t mem_dma; pp = kmalloc(sizeof(*pp), GFP_KERNEL); if (!pp) return -ENOMEM; memset(pp, 0, sizeof(*pp)); mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL); if (!mem) { kfree(pp); return -ENOMEM; } memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ); /* * First item in chunk of DMA memory: 32-slot command table, * 32 bytes each in size */ pp->cmd_slot = mem; pp->cmd_slot_dma = mem_dma; mem += AHCI_CMD_SLOT_SZ; mem_dma += AHCI_CMD_SLOT_SZ; /* * Second item: Received-FIS area */ pp->rx_fis = mem; pp->rx_fis_dma = mem_dma; mem += AHCI_RX_FIS_SZ; mem_dma += AHCI_RX_FIS_SZ; /* * Third item: data area for storing a single command * and its scatter-gather table */ pp->cmd_tbl = mem; pp->cmd_tbl_dma = mem_dma; pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR; ap->private_data = pp; if (hpriv->cap & HOST_CAP_64) writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI); writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); readl(port_mmio + PORT_LST_ADDR); /* flush */ if (hpriv->cap & HOST_CAP_64) writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI); writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); readl(port_mmio + PORT_FIS_ADDR); /* flush */ writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX | PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP | PORT_CMD_START, port_mmio + PORT_CMD); readl(port_mmio + PORT_CMD); /* flush */ return 0; } static void ahci_port_stop(struct ata_port *ap) { struct device *dev = ap->host_set->dev; struct ahci_port_priv *pp = ap->private_data; void *mmio = ap->host_set->mmio_base; void *port_mmio = ahci_port_base(mmio, ap->port_no); u32 tmp; tmp = readl(port_mmio + PORT_CMD); tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX); writel(tmp, port_mmio + PORT_CMD); readl(port_mmio + PORT_CMD); /* flush */ /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so * this is slightly incorrect. */ msleep(500); ap->private_data = NULL; dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, pp->cmd_slot, pp->cmd_slot_dma); kfree(pp); } static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in) { unsigned int sc_reg; switch (sc_reg_in) { case SCR_STATUS: sc_reg = 0; break; case SCR_CONTROL: sc_reg = 1; break; case SCR_ERROR: sc_reg = 2; break; case SCR_ACTIVE: sc_reg = 3; break; default: return 0xffffffffU; } return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4)); } static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in, u32 val) { unsigned int sc_reg; switch (sc_reg_in) { case SCR_STATUS: sc_reg = 0; break; case SCR_CONTROL: sc_reg = 1; break; case SCR_ERROR: sc_reg = 2; break; case SCR_ACTIVE: sc_reg = 3; break; default: return; } writel(val, (void *) 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 *mmio = (void *) ap->ioaddr.cmd_addr; return readl(mmio + PORT_TFDATA) & 0xFF; } static u8 ahci_check_err(struct ata_port *ap) { void *mmio = (void *) ap->ioaddr.cmd_addr; return (readl(mmio + PORT_TFDATA) >> 8) & 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; unsigned int i; VPRINTK("ENTER\n"); /* * Next, the S/G list. */ for (i = 0; i < qc->n_elem; i++) { u32 sg_len; dma_addr_t addr; addr = sg_dma_address(&qc->sg[i]); sg_len = sg_dma_len(&qc->sg[i]); pp->cmd_tbl_sg[i].addr = cpu_to_le32(addr & 0xffffffff); pp->cmd_tbl_sg[i].addr_hi = cpu_to_le32((addr >> 16) >> 16); pp->cmd_tbl_sg[i].flags_size = cpu_to_le32(sg_len - 1); } } 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 *mmio = ap->host_set->mmio_base; void *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) { void *mmio = ap->host_set->mmio_base; void *port_mmio = ahci_port_base(mmio, ap->port_no); struct ata_queued_cmd *qc; DPRINTK("ENTER\n"); 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, ATA_ERR); } } static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc) { void *mmio = ap->host_set->mmio_base; void *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, ATA_ERR); } 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 *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; u32 tmp; VPRINTK("port %u\n", i); ap = host_set->ports[i]; tmp = irq_stat & (1 << i); if (tmp && ap) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); if (ahci_host_intr(ap, qc)) 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 *port_mmio = (void *) 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) { printk(KERN_ERR DRV_NAME "(%s): controller reset failed (0x%x)\n", pci_name(pdev), 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) { printk(KERN_ERR DRV_NAME "(%s): 64-bit DMA enable failed\n", pci_name(pdev)); return rc; } } } else { rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); if (rc) { printk(KERN_ERR DRV_NAME "(%s): 32-bit DMA enable failed\n", pci_name(pdev)); return rc; } rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); if (rc) { printk(KERN_ERR DRV_NAME "(%s): 32-bit consistent DMA enable failed\n", pci_name(pdev)); 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; } /* move to PCI layer, integrate w/ MSI stuff */ static void pci_intx(struct pci_dev *pdev, int enable) { u16 pci_command, new; pci_read_config_word(pdev, PCI_COMMAND, &pci_command); if (enable) new = pci_command & ~PCI_COMMAND_INTX_DISABLE; else new = pci_command | PCI_COMMAND_INTX_DISABLE; if (new != pci_command) pci_write_config_word(pdev, PCI_COMMAND, pci_command); } 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 *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"; printk(KERN_INFO DRV_NAME "(%s) AHCI %02x%02x.%02x%02x " "%u slots %u ports %s Gbps 0x%x impl %s mode\n" , pci_name(pdev), (vers >> 24) & 0xff, (vers >> 16) & 0xff, (vers >> 8) & 0xff, vers & 0xff, ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s); printk(KERN_INFO DRV_NAME "(%s) flags: " "%s%s%s%s%s%s" "%s%s%s%s%s%s%s\n" , pci_name(pdev), 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 *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++) printk(KERN_DEBUG DRV_NAME " 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 = ioremap(pci_resource_start(pdev, AHCI_PCI_BAR), pci_resource_len(pdev, AHCI_PCI_BAR)); 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: iounmap(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); } host_set->ops->host_stop(host_set); 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);