/* * ahci.c - AHCI SATA support * * Maintained by: Jeff Garzik * Please ALWAYS copy linux-ide@vger.kernel.org * on emails. * * Copyright 2004-2005 Red Hat, Inc. * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/DocBook/libata.* * * AHCI hardware documentation: * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf * */ #include #include #include #include #include #include #include #include #include #include #include #include #define DRV_NAME "ahci" #define DRV_VERSION "2.1" enum { AHCI_PCI_BAR = 5, AHCI_MAX_PORTS = 32, AHCI_MAX_SG = 168, /* hardware max is 64K */ AHCI_DMA_BOUNDARY = 0xffffffff, AHCI_USE_CLUSTERING = 0, AHCI_MAX_CMDS = 32, AHCI_CMD_SZ = 32, AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ, AHCI_RX_FIS_SZ = 256, AHCI_CMD_TBL_CDB = 0x40, AHCI_CMD_TBL_HDR_SZ = 0x80, AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16), AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS, AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ, AHCI_IRQ_ON_SG = (1 << 31), AHCI_CMD_ATAPI = (1 << 5), AHCI_CMD_WRITE = (1 << 6), AHCI_CMD_PREFETCH = (1 << 7), AHCI_CMD_RESET = (1 << 8), AHCI_CMD_CLR_BUSY = (1 << 10), RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */ RX_FIS_SDB = 0x58, /* offset of SDB FIS data */ RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */ board_ahci = 0, board_ahci_pi = 1, board_ahci_vt8251 = 2, board_ahci_ign_iferr = 3, board_ahci_sb600 = 4, /* 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_SSC = (1 << 14), /* Slumber capable */ HOST_CAP_CLO = (1 << 24), /* Command List Override support */ HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */ HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */ 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_FREEZE = PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS, PORT_IRQ_ERROR = PORT_IRQ_FREEZE | PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR, DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE | PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS, /* PORT_CMD bits */ PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */ 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_CLO = (1 << 3), /* Command list override */ 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_MASK = (0xf << 28), /* i/f ICC state mask */ 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 */ /* ap->flags bits */ AHCI_FLAG_NO_NCQ = (1 << 24), AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */ AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */ AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */ }; 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 { u32 cap; /* cap to use */ u32 port_map; /* port map to use */ u32 saved_cap; /* saved initial cap */ u32 saved_port_map; /* saved initial port_map */ }; 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; void *rx_fis; dma_addr_t rx_fis_dma; /* for NCQ spurious interrupt analysis */ unsigned int ncq_saw_d2h:1; unsigned int ncq_saw_dmas:1; unsigned int ncq_saw_sdb:1; }; 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 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); static irqreturn_t ahci_interrupt (int irq, void *dev_instance); static void ahci_irq_clear(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_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 void ahci_freeze(struct ata_port *ap); static void ahci_thaw(struct ata_port *ap); static void ahci_error_handler(struct ata_port *ap); static void ahci_vt8251_error_handler(struct ata_port *ap); static void ahci_post_internal_cmd(struct ata_queued_cmd *qc); #ifdef CONFIG_PM static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg); static int ahci_port_resume(struct ata_port *ap); static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); static int ahci_pci_device_resume(struct pci_dev *pdev); #endif static struct scsi_host_template ahci_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .change_queue_depth = ata_scsi_change_queue_depth, .can_queue = AHCI_MAX_CMDS - 1, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = AHCI_MAX_SG, .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, .slave_destroy = ata_scsi_slave_destroy, .bios_param = ata_std_bios_param, #ifdef CONFIG_PM .suspend = ata_scsi_device_suspend, .resume = ata_scsi_device_resume, #endif }; static const struct ata_port_operations ahci_ops = { .port_disable = ata_port_disable, .check_status = ahci_check_status, .check_altstatus = ahci_check_status, .dev_select = ata_noop_dev_select, .tf_read = ahci_tf_read, .qc_prep = ahci_qc_prep, .qc_issue = ahci_qc_issue, .irq_handler = ahci_interrupt, .irq_clear = ahci_irq_clear, .irq_on = ata_dummy_irq_on, .irq_ack = ata_dummy_irq_ack, .scr_read = ahci_scr_read, .scr_write = ahci_scr_write, .freeze = ahci_freeze, .thaw = ahci_thaw, .error_handler = ahci_error_handler, .post_internal_cmd = ahci_post_internal_cmd, #ifdef CONFIG_PM .port_suspend = ahci_port_suspend, .port_resume = ahci_port_resume, #endif .port_start = ahci_port_start, .port_stop = ahci_port_stop, }; static const struct ata_port_operations ahci_vt8251_ops = { .port_disable = ata_port_disable, .check_status = ahci_check_status, .check_altstatus = ahci_check_status, .dev_select = ata_noop_dev_select, .tf_read = ahci_tf_read, .qc_prep = ahci_qc_prep, .qc_issue = ahci_qc_issue, .irq_handler = ahci_interrupt, .irq_clear = ahci_irq_clear, .irq_on = ata_dummy_irq_on, .irq_ack = ata_dummy_irq_ack, .scr_read = ahci_scr_read, .scr_write = ahci_scr_write, .freeze = ahci_freeze, .thaw = ahci_thaw, .error_handler = ahci_vt8251_error_handler, .post_internal_cmd = ahci_post_internal_cmd, #ifdef CONFIG_PM .port_suspend = ahci_port_suspend, .port_resume = ahci_port_resume, #endif .port_start = ahci_port_start, .port_stop = ahci_port_stop, }; static const struct ata_port_info ahci_port_info[] = { /* board_ahci */ { .sht = &ahci_sht, .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_SKIP_D2H_BSY, .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_ops, }, /* board_ahci_pi */ { .sht = &ahci_sht, .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI, .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_ops, }, /* board_ahci_vt8251 */ { .sht = &ahci_sht, .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_SKIP_D2H_BSY | ATA_FLAG_HRST_TO_RESUME | AHCI_FLAG_NO_NCQ, .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_vt8251_ops, }, /* board_ahci_ign_iferr */ { .sht = &ahci_sht, .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_IGN_IRQ_IF_ERR, .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_ops, }, /* board_ahci_sb600 */ { .sht = &ahci_sht, .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_IGN_SERR_INTERNAL, .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_ops, }, }; static const struct pci_device_id ahci_pci_tbl[] = { /* Intel */ { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */ { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */ { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */ { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */ { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */ { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */ { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */ { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */ { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */ { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */ { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */ { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */ { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */ { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */ { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */ { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */ { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */ { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */ { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */ { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */ { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */ { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */ { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */ { PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */ { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */ { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */ { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */ /* JMicron 360/1/3/5/6, match class to avoid IDE function */ { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr }, /* ATI */ { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 non-raid */ { PCI_VDEVICE(ATI, 0x4381), board_ahci }, /* ATI SB600 raid */ /* VIA */ { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */ /* NVIDIA */ { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */ { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */ { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */ /* SiS */ { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */ { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */ { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */ /* Generic, PCI class code for AHCI */ { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci }, { } /* terminate list */ }; static struct pci_driver ahci_pci_driver = { .name = DRV_NAME, .id_table = ahci_pci_tbl, .probe = ahci_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM .suspend = ahci_pci_device_suspend, .resume = ahci_pci_device_resume, #endif }; static inline int ahci_nr_ports(u32 cap) { return (cap & 0x1f) + 1; } static inline void __iomem *ahci_port_base(void __iomem *base, unsigned int port) { return base + 0x100 + (port * 0x80); } /** * ahci_save_initial_config - Save and fixup initial config values * @probe_ent: probe_ent of target device * * Some registers containing configuration info might be setup by * BIOS and might be cleared on reset. This function saves the * initial values of those registers into @hpriv such that they * can be restored after controller reset. * * If inconsistent, config values are fixed up by this function. * * LOCKING: * None. */ static void ahci_save_initial_config(struct ata_probe_ent *probe_ent) { struct ahci_host_priv *hpriv = probe_ent->private_data; void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR]; u32 cap, port_map; int i; /* Values prefixed with saved_ are written back to host after * reset. Values without are used for driver operation. */ hpriv->saved_cap = cap = readl(mmio + HOST_CAP); hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL); /* fixup zero port_map */ if (!port_map) { port_map = (1 << ahci_nr_ports(hpriv->cap)) - 1; dev_printk(KERN_WARNING, probe_ent->dev, "PORTS_IMPL is zero, forcing 0x%x\n", port_map); /* write the fixed up value to the PI register */ hpriv->saved_port_map = port_map; } /* cross check port_map and cap.n_ports */ if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) { u32 tmp_port_map = port_map; int n_ports = ahci_nr_ports(cap); for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) { if (tmp_port_map & (1 << i)) { n_ports--; tmp_port_map &= ~(1 << i); } } /* Whine if inconsistent. No need to update cap. * port_map is used to determine number of ports. */ if (n_ports || tmp_port_map) dev_printk(KERN_WARNING, probe_ent->dev, "nr_ports (%u) and implemented port map " "(0x%x) don't match\n", ahci_nr_ports(cap), port_map); } else { /* fabricate port_map from cap.nr_ports */ port_map = (1 << ahci_nr_ports(cap)) - 1; } /* record values to use during operation */ hpriv->cap = cap; hpriv->port_map = port_map; } /** * ahci_restore_initial_config - Restore initial config * @mmio: MMIO base for the host * @hpriv: host private data * * Restore initial config stored by ahci_save_initial_config(). * * LOCKING: * None. */ static void ahci_restore_initial_config(void __iomem *mmio, struct ahci_host_priv *hpriv) { writel(hpriv->saved_cap, mmio + HOST_CAP); writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL); (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ } 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(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, ap->ioaddr.scr_addr + (sc_reg * 4)); } static void ahci_start_engine(void __iomem *port_mmio) { u32 tmp; /* start DMA */ tmp = readl(port_mmio + PORT_CMD); tmp |= PORT_CMD_START; writel(tmp, port_mmio + PORT_CMD); readl(port_mmio + PORT_CMD); /* flush */ } static int ahci_stop_engine(void __iomem *port_mmio) { u32 tmp; tmp = readl(port_mmio + PORT_CMD); /* check if the HBA is idle */ if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0) return 0; /* setting HBA to idle */ tmp &= ~PORT_CMD_START; writel(tmp, port_mmio + PORT_CMD); /* wait for engine to stop. This could be as long as 500 msec */ tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500); if (tmp & PORT_CMD_LIST_ON) return -EIO; return 0; } static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap, dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma) { u32 tmp; /* set FIS registers */ if (cap & HOST_CAP_64) writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI); writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); if (cap & HOST_CAP_64) writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI); writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); /* enable FIS reception */ tmp = readl(port_mmio + PORT_CMD); tmp |= PORT_CMD_FIS_RX; writel(tmp, port_mmio + PORT_CMD); /* flush */ readl(port_mmio + PORT_CMD); } static int ahci_stop_fis_rx(void __iomem *port_mmio) { u32 tmp; /* disable FIS reception */ tmp = readl(port_mmio + PORT_CMD); tmp &= ~PORT_CMD_FIS_RX; writel(tmp, port_mmio + PORT_CMD); /* wait for completion, spec says 500ms, give it 1000 */ tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON, PORT_CMD_FIS_ON, 10, 1000); if (tmp & PORT_CMD_FIS_ON) return -EBUSY; return 0; } static void ahci_power_up(void __iomem *port_mmio, u32 cap) { u32 cmd; cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; /* spin up device */ if (cap & HOST_CAP_SSS) { cmd |= PORT_CMD_SPIN_UP; writel(cmd, port_mmio + PORT_CMD); } /* wake up link */ writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD); } #ifdef CONFIG_PM static void ahci_power_down(void __iomem *port_mmio, u32 cap) { u32 cmd, scontrol; if (!(cap & HOST_CAP_SSS)) return; /* put device into listen mode, first set PxSCTL.DET to 0 */ scontrol = readl(port_mmio + PORT_SCR_CTL); scontrol &= ~0xf; writel(scontrol, port_mmio + PORT_SCR_CTL); /* then set PxCMD.SUD to 0 */ cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; cmd &= ~PORT_CMD_SPIN_UP; writel(cmd, port_mmio + PORT_CMD); } #endif static void ahci_init_port(void __iomem *port_mmio, u32 cap, dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma) { /* enable FIS reception */ ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma); /* enable DMA */ ahci_start_engine(port_mmio); } static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg) { int rc; /* disable DMA */ rc = ahci_stop_engine(port_mmio); if (rc) { *emsg = "failed to stop engine"; return rc; } /* disable FIS reception */ rc = ahci_stop_fis_rx(port_mmio); if (rc) { *emsg = "failed stop FIS RX"; return rc; } return 0; } static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev, struct ahci_host_priv *hpriv) { u32 tmp; /* 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; } /* turn on AHCI mode */ writel(HOST_AHCI_EN, mmio + HOST_CTL); (void) readl(mmio + HOST_CTL); /* flush */ /* some registers might be cleared on reset. restore initial values */ ahci_restore_initial_config(mmio, hpriv); if (pdev->vendor == PCI_VENDOR_ID_INTEL) { u16 tmp16; /* configure PCS */ pci_read_config_word(pdev, 0x92, &tmp16); tmp16 |= 0xf; pci_write_config_word(pdev, 0x92, tmp16); } return 0; } static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev, int n_ports, unsigned int port_flags, struct ahci_host_priv *hpriv) { int i, rc; u32 tmp; for (i = 0; i < n_ports; i++) { void __iomem *port_mmio = ahci_port_base(mmio, i); const char *emsg = NULL; if ((port_flags & AHCI_FLAG_HONOR_PI) && !(hpriv->port_map & (1 << i))) continue; /* make sure port is not active */ rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg); if (rc) dev_printk(KERN_WARNING, &pdev->dev, "%s (%d)\n", emsg, rc); /* clear SError */ tmp = readl(port_mmio + PORT_SCR_ERR); VPRINTK("PORT_SCR_ERR 0x%x\n", tmp); writel(tmp, port_mmio + PORT_SCR_ERR); /* clear port IRQ */ 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); } 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); } static unsigned int ahci_dev_classify(struct ata_port *ap) { void __iomem *port_mmio = ap->ioaddr.cmd_addr; struct ata_taskfile tf; u32 tmp; 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; return ata_dev_classify(&tf); } static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, u32 opts) { dma_addr_t cmd_tbl_dma; cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ; pp->cmd_slot[tag].opts = cpu_to_le32(opts); pp->cmd_slot[tag].status = 0; pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff); pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16); } static int ahci_clo(struct ata_port *ap) { void __iomem *port_mmio = ap->ioaddr.cmd_addr; struct ahci_host_priv *hpriv = ap->host->private_data; u32 tmp; if (!(hpriv->cap & HOST_CAP_CLO)) return -EOPNOTSUPP; tmp = readl(port_mmio + PORT_CMD); tmp |= PORT_CMD_CLO; writel(tmp, port_mmio + PORT_CMD); tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); if (tmp & PORT_CMD_CLO) return -EIO; return 0; } static int ahci_softreset(struct ata_port *ap, unsigned int *class) { struct ahci_port_priv *pp = ap->private_data; void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); const u32 cmd_fis_len = 5; /* five dwords */ const char *reason = NULL; struct ata_taskfile tf; u32 tmp; u8 *fis; int rc; DPRINTK("ENTER\n"); if (ata_port_offline(ap)) { DPRINTK("PHY reports no device\n"); *class = ATA_DEV_NONE; return 0; } /* prepare for SRST (AHCI-1.1 10.4.1) */ rc = ahci_stop_engine(port_mmio); if (rc) { reason = "failed to stop engine"; goto fail_restart; } /* check BUSY/DRQ, perform Command List Override if necessary */ if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) { rc = ahci_clo(ap); if (rc == -EOPNOTSUPP) { reason = "port busy but CLO unavailable"; goto fail_restart; } else if (rc) { reason = "port busy but CLO failed"; goto fail_restart; } } /* restart engine */ ahci_start_engine(port_mmio); ata_tf_init(ap->device, &tf); fis = pp->cmd_tbl; /* issue the first D2H Register FIS */ ahci_fill_cmd_slot(pp, 0, cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY); tf.ctl |= ATA_SRST; ata_tf_to_fis(&tf, fis, 0); fis[1] &= ~(1 << 7); /* turn off Command FIS bit */ writel(1, port_mmio + PORT_CMD_ISSUE); tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500); if (tmp & 0x1) { rc = -EIO; reason = "1st FIS failed"; goto fail; } /* spec says at least 5us, but be generous and sleep for 1ms */ msleep(1); /* issue the second D2H Register FIS */ ahci_fill_cmd_slot(pp, 0, cmd_fis_len); tf.ctl &= ~ATA_SRST; ata_tf_to_fis(&tf, fis, 0); fis[1] &= ~(1 << 7); /* turn off Command FIS bit */ writel(1, port_mmio + PORT_CMD_ISSUE); readl(port_mmio + PORT_CMD_ISSUE); /* flush */ /* spec mandates ">= 2ms" before checking status. * We wait 150ms, because that was the magic delay used for * ATAPI devices in Hale Landis's ATADRVR, for the period of time * between when the ATA command register is written, and then * status is checked. Because waiting for "a while" before * checking status is fine, post SRST, we perform this magic * delay here as well. */ msleep(150); *class = ATA_DEV_NONE; if (ata_port_online(ap)) { if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { rc = -EIO; reason = "device not ready"; goto fail; } *class = ahci_dev_classify(ap); } DPRINTK("EXIT, class=%u\n", *class); return 0; fail_restart: ahci_start_engine(port_mmio); fail: ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason); return rc; } static int ahci_hardreset(struct ata_port *ap, unsigned int *class) { struct ahci_port_priv *pp = ap->private_data; u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; struct ata_taskfile tf; void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); int rc; DPRINTK("ENTER\n"); ahci_stop_engine(port_mmio); /* clear D2H reception area to properly wait for D2H FIS */ ata_tf_init(ap->device, &tf); tf.command = 0x80; ata_tf_to_fis(&tf, d2h_fis, 0); rc = sata_std_hardreset(ap, class); ahci_start_engine(port_mmio); if (rc == 0 && ata_port_online(ap)) *class = ahci_dev_classify(ap); if (*class == ATA_DEV_UNKNOWN) *class = ATA_DEV_NONE; DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); return rc; } static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class) { void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); int rc; DPRINTK("ENTER\n"); ahci_stop_engine(port_mmio); rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context)); /* vt8251 needs SError cleared for the port to operate */ ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR)); ahci_start_engine(port_mmio); DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); /* vt8251 doesn't clear BSY on signature FIS reception, * request follow-up softreset. */ return rc ?: -EAGAIN; } static void ahci_postreset(struct ata_port *ap, unsigned int *class) { void __iomem *port_mmio = ap->ioaddr.cmd_addr; u32 new_tmp, tmp; ata_std_postreset(ap, class); /* Make sure port's ATAPI bit is set appropriately */ new_tmp = tmp = readl(port_mmio + PORT_CMD); if (*class == ATA_DEV_ATAPI) new_tmp |= PORT_CMD_ATAPI; else new_tmp &= ~PORT_CMD_ATAPI; if (new_tmp != tmp) { writel(new_tmp, port_mmio + PORT_CMD); readl(port_mmio + PORT_CMD); /* flush */ } } static u8 ahci_check_status(struct ata_port *ap) { void __iomem *mmio = 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 unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) { struct scatterlist *sg; struct ahci_sg *ahci_sg; unsigned int n_sg = 0; VPRINTK("ENTER\n"); /* * Next, the S/G list. */ ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; 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++; n_sg++; } return n_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; int is_atapi = is_atapi_taskfile(&qc->tf); void *cmd_tbl; u32 opts; const u32 cmd_fis_len = 5; /* five dwords */ unsigned int n_elem; /* * Fill in command table information. First, the header, * a SATA Register - Host to Device command FIS. */ cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ; ata_tf_to_fis(&qc->tf, cmd_tbl, 0); if (is_atapi) { memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); } n_elem = 0; if (qc->flags & ATA_QCFLAG_DMAMAP) n_elem = ahci_fill_sg(qc, cmd_tbl); /* * Fill in command slot information. */ opts = cmd_fis_len | n_elem << 16; if (qc->tf.flags & ATA_TFLAG_WRITE) opts |= AHCI_CMD_WRITE; if (is_atapi) opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; ahci_fill_cmd_slot(pp, qc->tag, opts); } static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) { struct ahci_port_priv *pp = ap->private_data; struct ata_eh_info *ehi = &ap->eh_info; unsigned int err_mask = 0, action = 0; struct ata_queued_cmd *qc; u32 serror; ata_ehi_clear_desc(ehi); /* AHCI needs SError cleared; otherwise, it might lock up */ serror = ahci_scr_read(ap, SCR_ERROR); ahci_scr_write(ap, SCR_ERROR, serror); /* analyze @irq_stat */ ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); /* some controllers set IRQ_IF_ERR on device errors, ignore it */ if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR) irq_stat &= ~PORT_IRQ_IF_ERR; if (irq_stat & PORT_IRQ_TF_ERR) { err_mask |= AC_ERR_DEV; if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL) serror &= ~SERR_INTERNAL; } if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { err_mask |= AC_ERR_HOST_BUS; action |= ATA_EH_SOFTRESET; } if (irq_stat & PORT_IRQ_IF_ERR) { err_mask |= AC_ERR_ATA_BUS; action |= ATA_EH_SOFTRESET; ata_ehi_push_desc(ehi, ", interface fatal error"); } if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { ata_ehi_hotplugged(ehi); ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ? "connection status changed" : "PHY RDY changed"); } if (irq_stat & PORT_IRQ_UNK_FIS) { u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK); err_mask |= AC_ERR_HSM; action |= ATA_EH_SOFTRESET; ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x", unk[0], unk[1], unk[2], unk[3]); } /* okay, let's hand over to EH */ ehi->serror |= serror; ehi->action |= action; qc = ata_qc_from_tag(ap, ap->active_tag); if (qc) qc->err_mask |= err_mask; else ehi->err_mask |= err_mask; if (irq_stat & PORT_IRQ_FREEZE) ata_port_freeze(ap); else ata_port_abort(ap); } static void ahci_host_intr(struct ata_port *ap) { void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); struct ata_eh_info *ehi = &ap->eh_info; struct ahci_port_priv *pp = ap->private_data; u32 status, qc_active; int rc, known_irq = 0; status = readl(port_mmio + PORT_IRQ_STAT); writel(status, port_mmio + PORT_IRQ_STAT); if (unlikely(status & PORT_IRQ_ERROR)) { ahci_error_intr(ap, status); return; } if (ap->sactive) qc_active = readl(port_mmio + PORT_SCR_ACT); else qc_active = readl(port_mmio + PORT_CMD_ISSUE); rc = ata_qc_complete_multiple(ap, qc_active, NULL); if (rc > 0) return; if (rc < 0) { ehi->err_mask |= AC_ERR_HSM; ehi->action |= ATA_EH_SOFTRESET; ata_port_freeze(ap); return; } /* hmmm... a spurious interupt */ /* if !NCQ, ignore. No modern ATA device has broken HSM * implementation for non-NCQ commands. */ if (!ap->sactive) return; if (status & PORT_IRQ_D2H_REG_FIS) { if (!pp->ncq_saw_d2h) ata_port_printk(ap, KERN_INFO, "D2H reg with I during NCQ, " "this message won't be printed again\n"); pp->ncq_saw_d2h = 1; known_irq = 1; } if (status & PORT_IRQ_DMAS_FIS) { if (!pp->ncq_saw_dmas) ata_port_printk(ap, KERN_INFO, "DMAS FIS during NCQ, " "this message won't be printed again\n"); pp->ncq_saw_dmas = 1; known_irq = 1; } if (status & PORT_IRQ_SDB_FIS) { const __le32 *f = pp->rx_fis + RX_FIS_SDB; if (le32_to_cpu(f[1])) { /* SDB FIS containing spurious completions * might be dangerous, whine and fail commands * with HSM violation. EH will turn off NCQ * after several such failures. */ ata_ehi_push_desc(ehi, "spurious completions during NCQ " "issue=0x%x SAct=0x%x FIS=%08x:%08x", readl(port_mmio + PORT_CMD_ISSUE), readl(port_mmio + PORT_SCR_ACT), le32_to_cpu(f[0]), le32_to_cpu(f[1])); ehi->err_mask |= AC_ERR_HSM; ehi->action |= ATA_EH_SOFTRESET; ata_port_freeze(ap); } else { if (!pp->ncq_saw_sdb) ata_port_printk(ap, KERN_INFO, "spurious SDB FIS %08x:%08x during NCQ, " "this message won't be printed again\n", le32_to_cpu(f[0]), le32_to_cpu(f[1])); pp->ncq_saw_sdb = 1; } known_irq = 1; } if (!known_irq) ata_port_printk(ap, KERN_INFO, "spurious interrupt " "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n", status, ap->active_tag, ap->sactive); } static void ahci_irq_clear(struct ata_port *ap) { /* TODO */ } static irqreturn_t ahci_interrupt(int irq, void *dev_instance) { struct ata_host *host = 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->private_data; mmio = host->iomap[AHCI_PCI_BAR]; /* 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->lock); for (i = 0; i < host->n_ports; i++) { struct ata_port *ap; if (!(irq_stat & (1 << i))) continue; ap = host->ports[i]; if (ap) { ahci_host_intr(ap); VPRINTK("port %u\n", i); } else { VPRINTK("port %u (no irq)\n", i); if (ata_ratelimit()) dev_printk(KERN_WARNING, host->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->lock); VPRINTK("EXIT\n"); return IRQ_RETVAL(handled); } static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; void __iomem *port_mmio = ap->ioaddr.cmd_addr; if (qc->tf.protocol == ATA_PROT_NCQ) writel(1 << qc->tag, port_mmio + PORT_SCR_ACT); writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE); readl(port_mmio + PORT_CMD_ISSUE); /* flush */ return 0; } static void ahci_freeze(struct ata_port *ap) { void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); /* turn IRQ off */ writel(0, port_mmio + PORT_IRQ_MASK); } static void ahci_thaw(struct ata_port *ap) { void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); u32 tmp; /* clear IRQ */ tmp = readl(port_mmio + PORT_IRQ_STAT); writel(tmp, port_mmio + PORT_IRQ_STAT); writel(1 << ap->port_no, mmio + HOST_IRQ_STAT); /* turn IRQ back on */ writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK); } static void ahci_error_handler(struct ata_port *ap) { void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); if (!(ap->pflags & ATA_PFLAG_FROZEN)) { /* restart engine */ ahci_stop_engine(port_mmio); ahci_start_engine(port_mmio); } /* perform recovery */ ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset, ahci_postreset); } static void ahci_vt8251_error_handler(struct ata_port *ap) { void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); if (!(ap->pflags & ATA_PFLAG_FROZEN)) { /* restart engine */ ahci_stop_engine(port_mmio); ahci_start_engine(port_mmio); } /* perform recovery */ ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset, ahci_postreset); } static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); if (qc->flags & ATA_QCFLAG_FAILED) qc->err_mask |= AC_ERR_OTHER; if (qc->err_mask) { /* make DMA engine forget about the failed command */ ahci_stop_engine(port_mmio); ahci_start_engine(port_mmio); } } #ifdef CONFIG_PM static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) { struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_port_priv *pp = ap->private_data; void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); const char *emsg = NULL; int rc; rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg); if (rc == 0) ahci_power_down(port_mmio, hpriv->cap); else { ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc); ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma); } return rc; } static int ahci_port_resume(struct ata_port *ap) { struct ahci_port_priv *pp = ap->private_data; struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); ahci_power_up(port_mmio, hpriv->cap); ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma); return 0; } static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) { struct ata_host *host = dev_get_drvdata(&pdev->dev); void __iomem *mmio = host->iomap[AHCI_PCI_BAR]; u32 ctl; if (mesg.event == PM_EVENT_SUSPEND) { /* AHCI spec rev1.1 section 8.3.3: * Software must disable interrupts prior to requesting a * transition of the HBA to D3 state. */ ctl = readl(mmio + HOST_CTL); ctl &= ~HOST_IRQ_EN; writel(ctl, mmio + HOST_CTL); readl(mmio + HOST_CTL); /* flush */ } return ata_pci_device_suspend(pdev, mesg); } static int ahci_pci_device_resume(struct pci_dev *pdev) { struct ata_host *host = dev_get_drvdata(&pdev->dev); struct ahci_host_priv *hpriv = host->private_data; void __iomem *mmio = host->iomap[AHCI_PCI_BAR]; int rc; rc = ata_pci_device_do_resume(pdev); if (rc) return rc; if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) { rc = ahci_reset_controller(mmio, pdev, hpriv); if (rc) return rc; ahci_init_controller(mmio, pdev, host->n_ports, host->ports[0]->flags, hpriv); } ata_host_resume(host); return 0; } #endif static int ahci_port_start(struct ata_port *ap) { struct device *dev = ap->host->dev; struct ahci_host_priv *hpriv = ap->host->private_data; struct ahci_port_priv *pp; void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); void *mem; dma_addr_t mem_dma; int rc; pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); if (!pp) return -ENOMEM; rc = ata_pad_alloc(ap, dev); if (rc) return rc; mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL); if (!mem) 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; ap->private_data = pp; /* power up port */ ahci_power_up(port_mmio, hpriv->cap); /* initialize port */ ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma); return 0; } static void ahci_port_stop(struct ata_port *ap) { struct ahci_host_priv *hpriv = ap->host->private_data; void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR]; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); const char *emsg = NULL; int rc; /* de-initialize port */ rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg); if (rc) ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc); } static void ahci_setup_port(struct ata_ioports *port, void __iomem *base, unsigned int port_idx) { VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx); base = ahci_port_base(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->iomap[AHCI_PCI_BAR]; unsigned int i, using_dac; int rc; rc = ahci_reset_controller(mmio, pdev, hpriv); if (rc) return rc; probe_ent->n_ports = fls(hpriv->port_map); probe_ent->dummy_port_mask = ~hpriv->port_map; 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++) ahci_setup_port(&probe_ent->port[i], mmio, i); ahci_init_controller(mmio, pdev, probe_ent->n_ports, probe_ent->port_flags, hpriv); 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->iomap[AHCI_PCI_BAR]; 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 == PCI_CLASS_STORAGE_IDE) scc_s = "IDE"; else if (cc == PCI_CLASS_STORAGE_SATA) scc_s = "SATA"; else if (cc == PCI_CLASS_STORAGE_RAID) 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; unsigned int board_idx = (unsigned int) ent->driver_data; struct device *dev = &pdev->dev; struct ata_probe_ent *probe_ent; struct ahci_host_priv *hpriv; int rc; VPRINTK("ENTER\n"); WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS); if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); rc = pcim_enable_device(pdev); if (rc) return rc; rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME); if (rc == -EBUSY) pcim_pin_device(pdev); if (rc) return rc; if (pci_enable_msi(pdev)) pci_intx(pdev, 1); probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL); if (probe_ent == NULL) return -ENOMEM; probe_ent->dev = pci_dev_to_dev(pdev); INIT_LIST_HEAD(&probe_ent->node); hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL); if (!hpriv) return -ENOMEM; probe_ent->sht = ahci_port_info[board_idx].sht; probe_ent->port_flags = ahci_port_info[board_idx].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 = IRQF_SHARED; probe_ent->iomap = pcim_iomap_table(pdev); probe_ent->private_data = hpriv; /* initialize adapter */ ahci_save_initial_config(probe_ent); rc = ahci_host_init(probe_ent); if (rc) return rc; if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) && (hpriv->cap & HOST_CAP_NCQ)) probe_ent->port_flags |= ATA_FLAG_NCQ; ahci_print_info(probe_ent); if (!ata_device_add(probe_ent)) return -ENODEV; devm_kfree(dev, probe_ent); return 0; } static int __init ahci_init(void) { return pci_register_driver(&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);