/* * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers * * Copyright 2005 Tejun Heo * * Based on preview driver from Silicon Image. * * 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. * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/dma-mapping.h> #include <linux/device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> #include <linux/libata.h> #include <asm/io.h> #define DRV_NAME "sata_sil24" #define DRV_VERSION "0.23" /* * Port request block (PRB) 32 bytes */ struct sil24_prb { u16 ctrl; u16 prot; u32 rx_cnt; u8 fis[6 * 4]; }; /* * Scatter gather entry (SGE) 16 bytes */ struct sil24_sge { u64 addr; u32 cnt; u32 flags; }; /* * Port multiplier */ struct sil24_port_multiplier { u32 diag; u32 sactive; }; enum { /* * Global controller registers (128 bytes @ BAR0) */ /* 32 bit regs */ HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */ HOST_CTRL = 0x40, HOST_IRQ_STAT = 0x44, HOST_PHY_CFG = 0x48, HOST_BIST_CTRL = 0x50, HOST_BIST_PTRN = 0x54, HOST_BIST_STAT = 0x58, HOST_MEM_BIST_STAT = 0x5c, HOST_FLASH_CMD = 0x70, /* 8 bit regs */ HOST_FLASH_DATA = 0x74, HOST_TRANSITION_DETECT = 0x75, HOST_GPIO_CTRL = 0x76, HOST_I2C_ADDR = 0x78, /* 32 bit */ HOST_I2C_DATA = 0x7c, HOST_I2C_XFER_CNT = 0x7e, HOST_I2C_CTRL = 0x7f, /* HOST_SLOT_STAT bits */ HOST_SSTAT_ATTN = (1 << 31), /* * Port registers * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2) */ PORT_REGS_SIZE = 0x2000, PORT_PRB = 0x0000, /* (32 bytes PRB + 16 bytes SGEs * 6) * 31 (3968 bytes) */ PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */ /* 32 bit regs */ PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */ PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */ PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */ PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */ PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */ PORT_ACTIVATE_UPPER_ADDR= 0x101c, PORT_EXEC_FIFO = 0x1020, /* command execution fifo */ PORT_CMD_ERR = 0x1024, /* command error number */ PORT_FIS_CFG = 0x1028, PORT_FIFO_THRES = 0x102c, /* 16 bit regs */ PORT_DECODE_ERR_CNT = 0x1040, PORT_DECODE_ERR_THRESH = 0x1042, PORT_CRC_ERR_CNT = 0x1044, PORT_CRC_ERR_THRESH = 0x1046, PORT_HSHK_ERR_CNT = 0x1048, PORT_HSHK_ERR_THRESH = 0x104a, /* 32 bit regs */ PORT_PHY_CFG = 0x1050, PORT_SLOT_STAT = 0x1800, PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */ PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */ PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */ PORT_SCONTROL = 0x1f00, PORT_SSTATUS = 0x1f04, PORT_SERROR = 0x1f08, PORT_SACTIVE = 0x1f0c, /* PORT_CTRL_STAT bits */ PORT_CS_PORT_RST = (1 << 0), /* port reset */ PORT_CS_DEV_RST = (1 << 1), /* device reset */ PORT_CS_INIT = (1 << 2), /* port initialize */ PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */ PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */ PORT_CS_RESUME = (1 << 6), /* port resume */ PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */ PORT_CS_PM_EN = (1 << 13), /* port multiplier enable */ PORT_CS_RDY = (1 << 31), /* port ready to accept commands */ /* PORT_IRQ_STAT/ENABLE_SET/CLR */ /* bits[11:0] are masked */ PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */ PORT_IRQ_ERROR = (1 << 1), /* command execution error */ PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */ PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */ PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */ PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */ PORT_IRQ_UNK_FIS = (1 << 6), /* Unknown FIS received */ PORT_IRQ_SDB_FIS = (1 << 11), /* SDB FIS received */ /* bits[27:16] are unmasked (raw) */ PORT_IRQ_RAW_SHIFT = 16, PORT_IRQ_MASKED_MASK = 0x7ff, PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT), /* ENABLE_SET/CLR specific, intr steering - 2 bit field */ PORT_IRQ_STEER_SHIFT = 30, PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT), /* PORT_CMD_ERR constants */ PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */ PORT_CERR_SDB = 2, /* Error bit in SDB FIS */ PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */ PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */ PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */ PORT_CERR_DIRECTION = 6, /* Data direction mismatch */ PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */ PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */ PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */ PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */ PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */ PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */ PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */ PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */ PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */ PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */ PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */ PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */ PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */ PORT_CERR_XFR_MSGABRT = 34, /* PSD ecode 10 - master abort */ PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */ PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */ /* bits of PRB control field */ PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */ PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */ PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */ PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */ PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */ /* PRB protocol field */ PRB_PROT_PACKET = (1 << 0), PRB_PROT_TCQ = (1 << 1), PRB_PROT_NCQ = (1 << 2), PRB_PROT_READ = (1 << 3), PRB_PROT_WRITE = (1 << 4), PRB_PROT_TRANSPARENT = (1 << 5), /* * Other constants */ SGE_TRM = (1 << 31), /* Last SGE in chain */ SGE_LNK = (1 << 30), /* linked list Points to SGT, not SGE */ SGE_DRD = (1 << 29), /* discard data read (/dev/null) data address ignored */ /* board id */ BID_SIL3124 = 0, BID_SIL3132 = 1, BID_SIL3131 = 2, IRQ_STAT_4PORTS = 0xf, }; struct sil24_ata_block { struct sil24_prb prb; struct sil24_sge sge[LIBATA_MAX_PRD]; }; struct sil24_atapi_block { struct sil24_prb prb; u8 cdb[16]; struct sil24_sge sge[LIBATA_MAX_PRD - 1]; }; union sil24_cmd_block { struct sil24_ata_block ata; struct sil24_atapi_block atapi; }; /* * ap->private_data * * The preview driver always returned 0 for status. We emulate it * here from the previous interrupt. */ struct sil24_port_priv { union sil24_cmd_block *cmd_block; /* 32 cmd blocks */ dma_addr_t cmd_block_dma; /* DMA base addr for them */ struct ata_taskfile tf; /* Cached taskfile registers */ }; /* ap->host_set->private_data */ struct sil24_host_priv { void __iomem *host_base; /* global controller control (128 bytes @BAR0) */ void __iomem *port_base; /* port registers (4 * 8192 bytes @BAR2) */ }; static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev); static u8 sil24_check_status(struct ata_port *ap); static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg); static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val); static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf); static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes); static void sil24_qc_prep(struct ata_queued_cmd *qc); static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); static void sil24_irq_clear(struct ata_port *ap); static void sil24_eng_timeout(struct ata_port *ap); static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs); static int sil24_port_start(struct ata_port *ap); static void sil24_port_stop(struct ata_port *ap); static void sil24_host_stop(struct ata_host_set *host_set); static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static const struct pci_device_id sil24_pci_tbl[] = { { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 }, { 0x8086, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 }, { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 }, { 0x1095, 0x3131, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 }, { 0x1095, 0x3531, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 }, { } /* terminate list */ }; static struct pci_driver sil24_pci_driver = { .name = DRV_NAME, .id_table = sil24_pci_tbl, .probe = sil24_init_one, .remove = ata_pci_remove_one, /* safe? */ }; static struct scsi_host_template sil24_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .bios_param = ata_std_bios_param, }; static const struct ata_port_operations sil24_ops = { .port_disable = ata_port_disable, .dev_config = sil24_dev_config, .check_status = sil24_check_status, .check_altstatus = sil24_check_status, .dev_select = ata_noop_dev_select, .tf_read = sil24_tf_read, .probe_reset = sil24_probe_reset, .qc_prep = sil24_qc_prep, .qc_issue = sil24_qc_issue, .eng_timeout = sil24_eng_timeout, .irq_handler = sil24_interrupt, .irq_clear = sil24_irq_clear, .scr_read = sil24_scr_read, .scr_write = sil24_scr_write, .port_start = sil24_port_start, .port_stop = sil24_port_stop, .host_stop = sil24_host_stop, }; /* * Use bits 30-31 of host_flags to encode available port numbers. * Current maxium is 4. */ #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30) #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1) static struct ata_port_info sil24_port_info[] = { /* sil_3124 */ { .sht = &sil24_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(4), .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ .port_ops = &sil24_ops, }, /* sil_3132 */ { .sht = &sil24_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(2), .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ .port_ops = &sil24_ops, }, /* sil_3131/sil_3531 */ { .sht = &sil24_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(1), .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ .port_ops = &sil24_ops, }, }; static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev) { void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; if (dev->cdb_len == 16) writel(PORT_CS_CDB16, port + PORT_CTRL_STAT); else writel(PORT_CS_CDB16, port + PORT_CTRL_CLR); } static inline void sil24_update_tf(struct ata_port *ap) { struct sil24_port_priv *pp = ap->private_data; void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; struct sil24_prb __iomem *prb = port; u8 fis[6 * 4]; memcpy_fromio(fis, prb->fis, 6 * 4); ata_tf_from_fis(fis, &pp->tf); } static u8 sil24_check_status(struct ata_port *ap) { struct sil24_port_priv *pp = ap->private_data; return pp->tf.command; } static int sil24_scr_map[] = { [SCR_CONTROL] = 0, [SCR_STATUS] = 1, [SCR_ERROR] = 2, [SCR_ACTIVE] = 3, }; static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg) { void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr; if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { void __iomem *addr; addr = scr_addr + sil24_scr_map[sc_reg] * 4; return readl(scr_addr + sil24_scr_map[sc_reg] * 4); } return 0xffffffffU; } static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) { void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr; if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { void __iomem *addr; addr = scr_addr + sil24_scr_map[sc_reg] * 4; writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); } } static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf) { struct sil24_port_priv *pp = ap->private_data; *tf = pp->tf; } static int sil24_softreset(struct ata_port *ap, int verbose, unsigned int *class) { void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; struct sil24_port_priv *pp = ap->private_data; struct sil24_prb *prb = &pp->cmd_block[0].ata.prb; dma_addr_t paddr = pp->cmd_block_dma; unsigned long timeout = jiffies + ATA_TMOUT_BOOT * HZ; u32 irq_enable, irq_stat; DPRINTK("ENTER\n"); if (!sata_dev_present(ap)) { DPRINTK("PHY reports no device\n"); *class = ATA_DEV_NONE; goto out; } /* temporarily turn off IRQs during SRST */ irq_enable = readl(port + PORT_IRQ_ENABLE_SET); writel(irq_enable, port + PORT_IRQ_ENABLE_CLR); /* * XXX: Not sure whether the following sleep is needed or not. * The original driver had it. So.... */ msleep(10); prb->ctrl = cpu_to_le16(PRB_CTRL_SRST); prb->fis[1] = 0; /* no PM yet */ writel((u32)paddr, port + PORT_CMD_ACTIVATE); do { irq_stat = readl(port + PORT_IRQ_STAT); writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */ irq_stat >>= PORT_IRQ_RAW_SHIFT; if (irq_stat & (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR)) break; msleep(100); } while (time_before(jiffies, timeout)); /* restore IRQs */ writel(irq_enable, port + PORT_IRQ_ENABLE_SET); if (!(irq_stat & PORT_IRQ_COMPLETE)) { DPRINTK("EXIT, srst failed\n"); return -EIO; } sil24_update_tf(ap); *class = ata_dev_classify(&pp->tf); if (*class == ATA_DEV_UNKNOWN) *class = ATA_DEV_NONE; out: DPRINTK("EXIT, class=%u\n", *class); return 0; } static int sil24_hardreset(struct ata_port *ap, int verbose, unsigned int *class) { unsigned int dummy_class; /* sil24 doesn't report device signature after hard reset */ return sata_std_hardreset(ap, verbose, &dummy_class); } static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes) { return ata_drive_probe_reset(ap, ata_std_probeinit, sil24_softreset, sil24_hardreset, ata_std_postreset, classes); } static inline void sil24_fill_sg(struct ata_queued_cmd *qc, struct sil24_sge *sge) { struct scatterlist *sg; unsigned int idx = 0; ata_for_each_sg(sg, qc) { sge->addr = cpu_to_le64(sg_dma_address(sg)); sge->cnt = cpu_to_le32(sg_dma_len(sg)); if (ata_sg_is_last(sg, qc)) sge->flags = cpu_to_le32(SGE_TRM); else sge->flags = 0; sge++; idx++; } } static void sil24_qc_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct sil24_port_priv *pp = ap->private_data; union sil24_cmd_block *cb = pp->cmd_block + qc->tag; struct sil24_prb *prb; struct sil24_sge *sge; switch (qc->tf.protocol) { case ATA_PROT_PIO: case ATA_PROT_DMA: case ATA_PROT_NODATA: prb = &cb->ata.prb; sge = cb->ata.sge; prb->ctrl = 0; break; case ATA_PROT_ATAPI: case ATA_PROT_ATAPI_DMA: case ATA_PROT_ATAPI_NODATA: prb = &cb->atapi.prb; sge = cb->atapi.sge; memset(cb->atapi.cdb, 0, 32); memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len); if (qc->tf.protocol != ATA_PROT_ATAPI_NODATA) { if (qc->tf.flags & ATA_TFLAG_WRITE) prb->ctrl = cpu_to_le16(PRB_CTRL_PACKET_WRITE); else prb->ctrl = cpu_to_le16(PRB_CTRL_PACKET_READ); } else prb->ctrl = 0; break; default: prb = NULL; /* shut up, gcc */ sge = NULL; BUG(); } ata_tf_to_fis(&qc->tf, prb->fis, 0); if (qc->flags & ATA_QCFLAG_DMAMAP) sil24_fill_sg(qc, sge); } static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; struct sil24_port_priv *pp = ap->private_data; dma_addr_t paddr = pp->cmd_block_dma + qc->tag * sizeof(*pp->cmd_block); writel((u32)paddr, port + PORT_CMD_ACTIVATE); return 0; } static void sil24_irq_clear(struct ata_port *ap) { /* unused */ } static int __sil24_restart_controller(void __iomem *port) { u32 tmp; int cnt; writel(PORT_CS_INIT, port + PORT_CTRL_STAT); /* Max ~10ms */ for (cnt = 0; cnt < 10000; cnt++) { tmp = readl(port + PORT_CTRL_STAT); if (tmp & PORT_CS_RDY) return 0; udelay(1); } return -1; } static void sil24_restart_controller(struct ata_port *ap) { if (__sil24_restart_controller((void __iomem *)ap->ioaddr.cmd_addr)) printk(KERN_ERR DRV_NAME " ata%u: failed to restart controller\n", ap->id); } static int __sil24_reset_controller(void __iomem *port) { int cnt; u32 tmp; /* Reset controller state. Is this correct? */ writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); readl(port + PORT_CTRL_STAT); /* sync */ /* Max ~100ms */ for (cnt = 0; cnt < 1000; cnt++) { udelay(100); tmp = readl(port + PORT_CTRL_STAT); if (!(tmp & PORT_CS_DEV_RST)) break; } if (tmp & PORT_CS_DEV_RST) return -1; if (tmp & PORT_CS_RDY) return 0; return __sil24_restart_controller(port); } static void sil24_reset_controller(struct ata_port *ap) { printk(KERN_NOTICE DRV_NAME " ata%u: resetting controller...\n", ap->id); if (__sil24_reset_controller((void __iomem *)ap->ioaddr.cmd_addr)) printk(KERN_ERR DRV_NAME " ata%u: failed to reset controller\n", ap->id); } static void sil24_eng_timeout(struct ata_port *ap) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); printk(KERN_ERR "ata%u: command timeout\n", ap->id); qc->err_mask |= AC_ERR_TIMEOUT; ata_eh_qc_complete(qc); sil24_reset_controller(ap); } static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) { struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); struct sil24_port_priv *pp = ap->private_data; void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; u32 irq_stat, cmd_err, sstatus, serror; unsigned int err_mask; irq_stat = readl(port + PORT_IRQ_STAT); writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */ if (!(irq_stat & PORT_IRQ_ERROR)) { /* ignore non-completion, non-error irqs for now */ printk(KERN_WARNING DRV_NAME "ata%u: non-error exception irq (irq_stat %x)\n", ap->id, irq_stat); return; } cmd_err = readl(port + PORT_CMD_ERR); sstatus = readl(port + PORT_SSTATUS); serror = readl(port + PORT_SERROR); if (serror) writel(serror, port + PORT_SERROR); /* * Don't log ATAPI device errors. They're supposed to happen * and any serious errors will be logged using sense data by * the SCSI layer. */ if (ap->device[0].class != ATA_DEV_ATAPI || cmd_err > PORT_CERR_SDB) printk("ata%u: error interrupt on port%d\n" " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n", ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror); if (cmd_err == PORT_CERR_DEV || cmd_err == PORT_CERR_SDB) { /* * Device is reporting error, tf registers are valid. */ sil24_update_tf(ap); err_mask = ac_err_mask(pp->tf.command); sil24_restart_controller(ap); } else { /* * Other errors. libata currently doesn't have any * mechanism to report these errors. Just turn on * ATA_ERR. */ err_mask = AC_ERR_OTHER; sil24_reset_controller(ap); } if (qc) { qc->err_mask |= err_mask; ata_qc_complete(qc); } } static inline void sil24_host_intr(struct ata_port *ap) { struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; u32 slot_stat; slot_stat = readl(port + PORT_SLOT_STAT); if (!(slot_stat & HOST_SSTAT_ATTN)) { struct sil24_port_priv *pp = ap->private_data; /* * !HOST_SSAT_ATTN guarantees successful completion, * so reading back tf registers is unnecessary for * most commands. TODO: read tf registers for * commands which require these values on successful * completion (EXECUTE DEVICE DIAGNOSTIC, CHECK POWER, * DEVICE RESET and READ PORT MULTIPLIER (any more?). */ sil24_update_tf(ap); if (qc) { qc->err_mask |= ac_err_mask(pp->tf.command); ata_qc_complete(qc); } } else sil24_error_intr(ap, slot_stat); } static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs) { struct ata_host_set *host_set = dev_instance; struct sil24_host_priv *hpriv = host_set->private_data; unsigned handled = 0; u32 status; int i; status = readl(hpriv->host_base + HOST_IRQ_STAT); if (status == 0xffffffff) { printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, " "PCI fault or device removal?\n"); goto out; } if (!(status & IRQ_STAT_4PORTS)) goto out; spin_lock(&host_set->lock); for (i = 0; i < host_set->n_ports; i++) if (status & (1 << i)) { struct ata_port *ap = host_set->ports[i]; if (ap && !(ap->flags & ATA_FLAG_PORT_DISABLED)) { sil24_host_intr(host_set->ports[i]); handled++; } else printk(KERN_ERR DRV_NAME ": interrupt from disabled port %d\n", i); } spin_unlock(&host_set->lock); out: return IRQ_RETVAL(handled); } static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev) { const size_t cb_size = sizeof(*pp->cmd_block); dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma); } static int sil24_port_start(struct ata_port *ap) { struct device *dev = ap->host_set->dev; struct sil24_port_priv *pp; union sil24_cmd_block *cb; size_t cb_size = sizeof(*cb); dma_addr_t cb_dma; int rc = -ENOMEM; pp = kzalloc(sizeof(*pp), GFP_KERNEL); if (!pp) goto err_out; pp->tf.command = ATA_DRDY; cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); if (!cb) goto err_out_pp; memset(cb, 0, cb_size); rc = ata_pad_alloc(ap, dev); if (rc) goto err_out_pad; pp->cmd_block = cb; pp->cmd_block_dma = cb_dma; ap->private_data = pp; return 0; err_out_pad: sil24_cblk_free(pp, dev); err_out_pp: kfree(pp); err_out: return rc; } static void sil24_port_stop(struct ata_port *ap) { struct device *dev = ap->host_set->dev; struct sil24_port_priv *pp = ap->private_data; sil24_cblk_free(pp, dev); ata_pad_free(ap, dev); kfree(pp); } static void sil24_host_stop(struct ata_host_set *host_set) { struct sil24_host_priv *hpriv = host_set->private_data; struct pci_dev *pdev = to_pci_dev(host_set->dev); pci_iounmap(pdev, hpriv->host_base); pci_iounmap(pdev, hpriv->port_base); kfree(hpriv); } static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version = 0; unsigned int board_id = (unsigned int)ent->driver_data; struct ata_port_info *pinfo = &sil24_port_info[board_id]; struct ata_probe_ent *probe_ent = NULL; struct sil24_host_priv *hpriv = NULL; void __iomem *host_base = NULL; void __iomem *port_base = NULL; int i, rc; 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) goto out_disable; rc = -ENOMEM; /* map mmio registers */ host_base = pci_iomap(pdev, 0, 0); if (!host_base) goto out_free; port_base = pci_iomap(pdev, 2, 0); if (!port_base) goto out_free; /* allocate & init probe_ent and hpriv */ probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL); if (!probe_ent) goto out_free; hpriv = kzalloc(sizeof(*hpriv), GFP_KERNEL); if (!hpriv) goto out_free; probe_ent->dev = pci_dev_to_dev(pdev); INIT_LIST_HEAD(&probe_ent->node); probe_ent->sht = pinfo->sht; probe_ent->host_flags = pinfo->host_flags; probe_ent->pio_mask = pinfo->pio_mask; probe_ent->mwdma_mask = pinfo->mwdma_mask; probe_ent->udma_mask = pinfo->udma_mask; probe_ent->port_ops = pinfo->port_ops; probe_ent->n_ports = SIL24_FLAG2NPORTS(pinfo->host_flags); probe_ent->irq = pdev->irq; probe_ent->irq_flags = SA_SHIRQ; probe_ent->mmio_base = port_base; probe_ent->private_data = hpriv; hpriv->host_base = host_base; hpriv->port_base = port_base; /* * Configure the device */ /* * FIXME: This device is certainly 64-bit capable. We just * don't know how to use it. After fixing 32bit activation in * this function, enable 64bit masks here. */ rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); if (rc) { dev_printk(KERN_ERR, &pdev->dev, "32-bit DMA enable failed\n"); goto out_free; } 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"); goto out_free; } /* GPIO off */ writel(0, host_base + HOST_FLASH_CMD); /* Mask interrupts during initialization */ writel(0, host_base + HOST_CTRL); for (i = 0; i < probe_ent->n_ports; i++) { void __iomem *port = port_base + i * PORT_REGS_SIZE; unsigned long portu = (unsigned long)port; u32 tmp; int cnt; probe_ent->port[i].cmd_addr = portu + PORT_PRB; probe_ent->port[i].scr_addr = portu + PORT_SCONTROL; ata_std_ports(&probe_ent->port[i]); /* Initial PHY setting */ writel(0x20c, port + PORT_PHY_CFG); /* Clear port RST */ tmp = readl(port + PORT_CTRL_STAT); if (tmp & PORT_CS_PORT_RST) { writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); readl(port + PORT_CTRL_STAT); /* sync */ for (cnt = 0; cnt < 10; cnt++) { msleep(10); tmp = readl(port + PORT_CTRL_STAT); if (!(tmp & PORT_CS_PORT_RST)) break; } if (tmp & PORT_CS_PORT_RST) dev_printk(KERN_ERR, &pdev->dev, "failed to clear port RST\n"); } /* Zero error counters. */ writel(0x8000, port + PORT_DECODE_ERR_THRESH); writel(0x8000, port + PORT_CRC_ERR_THRESH); writel(0x8000, port + PORT_HSHK_ERR_THRESH); writel(0x0000, port + PORT_DECODE_ERR_CNT); writel(0x0000, port + PORT_CRC_ERR_CNT); writel(0x0000, port + PORT_HSHK_ERR_CNT); /* FIXME: 32bit activation? */ writel(0, port + PORT_ACTIVATE_UPPER_ADDR); writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_STAT); /* Configure interrupts */ writel(0xffff, port + PORT_IRQ_ENABLE_CLR); writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | PORT_IRQ_SDB_FIS, port + PORT_IRQ_ENABLE_SET); /* Clear interrupts */ writel(0x0fff0fff, port + PORT_IRQ_STAT); writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); /* Clear port multiplier enable and resume bits */ writel(PORT_CS_PM_EN | PORT_CS_RESUME, port + PORT_CTRL_CLR); /* Reset itself */ if (__sil24_reset_controller(port)) dev_printk(KERN_ERR, &pdev->dev, "failed to reset controller\n"); } /* Turn on interrupts */ writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL); pci_set_master(pdev); /* FIXME: check ata_device_add return value */ ata_device_add(probe_ent); kfree(probe_ent); return 0; out_free: if (host_base) pci_iounmap(pdev, host_base); if (port_base) pci_iounmap(pdev, port_base); kfree(probe_ent); kfree(hpriv); pci_release_regions(pdev); out_disable: pci_disable_device(pdev); return rc; } static int __init sil24_init(void) { return pci_module_init(&sil24_pci_driver); } static void __exit sil24_exit(void) { pci_unregister_driver(&sil24_pci_driver); } MODULE_AUTHOR("Tejun Heo"); MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, sil24_pci_tbl); module_init(sil24_init); module_exit(sil24_exit);