From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/ata/sata_qstor.c | 643 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 643 insertions(+) create mode 100644 drivers/ata/sata_qstor.c (limited to 'drivers/ata/sata_qstor.c') diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c new file mode 100644 index 000000000..af987a4f3 --- /dev/null +++ b/drivers/ata/sata_qstor.c @@ -0,0 +1,643 @@ +/* + * sata_qstor.c - Pacific Digital Corporation QStor SATA + * + * Maintained by: Mark Lord + * + * Copyright 2005 Pacific Digital Corporation. + * (OSL/GPL code release authorized by Jalil Fadavi). + * + * + * 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.* + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRV_NAME "sata_qstor" +#define DRV_VERSION "0.09" + +enum { + QS_MMIO_BAR = 4, + + QS_PORTS = 4, + QS_MAX_PRD = LIBATA_MAX_PRD, + QS_CPB_ORDER = 6, + QS_CPB_BYTES = (1 << QS_CPB_ORDER), + QS_PRD_BYTES = QS_MAX_PRD * 16, + QS_PKT_BYTES = QS_CPB_BYTES + QS_PRD_BYTES, + + /* global register offsets */ + QS_HCF_CNFG3 = 0x0003, /* host configuration offset */ + QS_HID_HPHY = 0x0004, /* host physical interface info */ + QS_HCT_CTRL = 0x00e4, /* global interrupt mask offset */ + QS_HST_SFF = 0x0100, /* host status fifo offset */ + QS_HVS_SERD3 = 0x0393, /* PHY enable offset */ + + /* global control bits */ + QS_HPHY_64BIT = (1 << 1), /* 64-bit bus detected */ + QS_CNFG3_GSRST = 0x01, /* global chip reset */ + QS_SERD3_PHY_ENA = 0xf0, /* PHY detection ENAble*/ + + /* per-channel register offsets */ + QS_CCF_CPBA = 0x0710, /* chan CPB base address */ + QS_CCF_CSEP = 0x0718, /* chan CPB separation factor */ + QS_CFC_HUFT = 0x0800, /* host upstream fifo threshold */ + QS_CFC_HDFT = 0x0804, /* host downstream fifo threshold */ + QS_CFC_DUFT = 0x0808, /* dev upstream fifo threshold */ + QS_CFC_DDFT = 0x080c, /* dev downstream fifo threshold */ + QS_CCT_CTR0 = 0x0900, /* chan control-0 offset */ + QS_CCT_CTR1 = 0x0901, /* chan control-1 offset */ + QS_CCT_CFF = 0x0a00, /* chan command fifo offset */ + + /* channel control bits */ + QS_CTR0_REG = (1 << 1), /* register mode (vs. pkt mode) */ + QS_CTR0_CLER = (1 << 2), /* clear channel errors */ + QS_CTR1_RDEV = (1 << 1), /* sata phy/comms reset */ + QS_CTR1_RCHN = (1 << 4), /* reset channel logic */ + QS_CCF_RUN_PKT = 0x107, /* RUN a new dma PKT */ + + /* pkt sub-field headers */ + QS_HCB_HDR = 0x01, /* Host Control Block header */ + QS_DCB_HDR = 0x02, /* Device Control Block header */ + + /* pkt HCB flag bits */ + QS_HF_DIRO = (1 << 0), /* data DIRection Out */ + QS_HF_DAT = (1 << 3), /* DATa pkt */ + QS_HF_IEN = (1 << 4), /* Interrupt ENable */ + QS_HF_VLD = (1 << 5), /* VaLiD pkt */ + + /* pkt DCB flag bits */ + QS_DF_PORD = (1 << 2), /* Pio OR Dma */ + QS_DF_ELBA = (1 << 3), /* Extended LBA (lba48) */ + + /* PCI device IDs */ + board_2068_idx = 0, /* QStor 4-port SATA/RAID */ +}; + +enum { + QS_DMA_BOUNDARY = ~0UL +}; + +typedef enum { qs_state_mmio, qs_state_pkt } qs_state_t; + +struct qs_port_priv { + u8 *pkt; + dma_addr_t pkt_dma; + qs_state_t state; +}; + +static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); +static int qs_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); +static int qs_port_start(struct ata_port *ap); +static void qs_host_stop(struct ata_host *host); +static void qs_qc_prep(struct ata_queued_cmd *qc); +static unsigned int qs_qc_issue(struct ata_queued_cmd *qc); +static int qs_check_atapi_dma(struct ata_queued_cmd *qc); +static void qs_freeze(struct ata_port *ap); +static void qs_thaw(struct ata_port *ap); +static int qs_prereset(struct ata_link *link, unsigned long deadline); +static void qs_error_handler(struct ata_port *ap); + +static struct scsi_host_template qs_ata_sht = { + ATA_BASE_SHT(DRV_NAME), + .sg_tablesize = QS_MAX_PRD, + .dma_boundary = QS_DMA_BOUNDARY, +}; + +static struct ata_port_operations qs_ata_ops = { + .inherits = &ata_sff_port_ops, + + .check_atapi_dma = qs_check_atapi_dma, + .qc_prep = qs_qc_prep, + .qc_issue = qs_qc_issue, + + .freeze = qs_freeze, + .thaw = qs_thaw, + .prereset = qs_prereset, + .softreset = ATA_OP_NULL, + .error_handler = qs_error_handler, + .lost_interrupt = ATA_OP_NULL, + + .scr_read = qs_scr_read, + .scr_write = qs_scr_write, + + .port_start = qs_port_start, + .host_stop = qs_host_stop, +}; + +static const struct ata_port_info qs_port_info[] = { + /* board_2068_idx */ + { + .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_POLLING, + .pio_mask = ATA_PIO4_ONLY, + .udma_mask = ATA_UDMA6, + .port_ops = &qs_ata_ops, + }, +}; + +static const struct pci_device_id qs_ata_pci_tbl[] = { + { PCI_VDEVICE(PDC, 0x2068), board_2068_idx }, + + { } /* terminate list */ +}; + +static struct pci_driver qs_ata_pci_driver = { + .name = DRV_NAME, + .id_table = qs_ata_pci_tbl, + .probe = qs_ata_init_one, + .remove = ata_pci_remove_one, +}; + +static void __iomem *qs_mmio_base(struct ata_host *host) +{ + return host->iomap[QS_MMIO_BAR]; +} + +static int qs_check_atapi_dma(struct ata_queued_cmd *qc) +{ + return 1; /* ATAPI DMA not supported */ +} + +static inline void qs_enter_reg_mode(struct ata_port *ap) +{ + u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000); + struct qs_port_priv *pp = ap->private_data; + + pp->state = qs_state_mmio; + writeb(QS_CTR0_REG, chan + QS_CCT_CTR0); + readb(chan + QS_CCT_CTR0); /* flush */ +} + +static inline void qs_reset_channel_logic(struct ata_port *ap) +{ + u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000); + + writeb(QS_CTR1_RCHN, chan + QS_CCT_CTR1); + readb(chan + QS_CCT_CTR0); /* flush */ + qs_enter_reg_mode(ap); +} + +static void qs_freeze(struct ata_port *ap) +{ + u8 __iomem *mmio_base = qs_mmio_base(ap->host); + + writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */ + qs_enter_reg_mode(ap); +} + +static void qs_thaw(struct ata_port *ap) +{ + u8 __iomem *mmio_base = qs_mmio_base(ap->host); + + qs_enter_reg_mode(ap); + writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */ +} + +static int qs_prereset(struct ata_link *link, unsigned long deadline) +{ + struct ata_port *ap = link->ap; + + qs_reset_channel_logic(ap); + return ata_sff_prereset(link, deadline); +} + +static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) +{ + if (sc_reg > SCR_CONTROL) + return -EINVAL; + *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 8)); + return 0; +} + +static void qs_error_handler(struct ata_port *ap) +{ + qs_enter_reg_mode(ap); + ata_sff_error_handler(ap); +} + +static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) +{ + if (sc_reg > SCR_CONTROL) + return -EINVAL; + writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 8)); + return 0; +} + +static unsigned int qs_fill_sg(struct ata_queued_cmd *qc) +{ + struct scatterlist *sg; + struct ata_port *ap = qc->ap; + struct qs_port_priv *pp = ap->private_data; + u8 *prd = pp->pkt + QS_CPB_BYTES; + unsigned int si; + + for_each_sg(qc->sg, sg, qc->n_elem, si) { + u64 addr; + u32 len; + + addr = sg_dma_address(sg); + *(__le64 *)prd = cpu_to_le64(addr); + prd += sizeof(u64); + + len = sg_dma_len(sg); + *(__le32 *)prd = cpu_to_le32(len); + prd += sizeof(u64); + + VPRINTK("PRD[%u] = (0x%llX, 0x%X)\n", si, + (unsigned long long)addr, len); + } + + return si; +} + +static void qs_qc_prep(struct ata_queued_cmd *qc) +{ + struct qs_port_priv *pp = qc->ap->private_data; + u8 dflags = QS_DF_PORD, *buf = pp->pkt; + u8 hflags = QS_HF_DAT | QS_HF_IEN | QS_HF_VLD; + u64 addr; + unsigned int nelem; + + VPRINTK("ENTER\n"); + + qs_enter_reg_mode(qc->ap); + if (qc->tf.protocol != ATA_PROT_DMA) + return; + + nelem = qs_fill_sg(qc); + + if ((qc->tf.flags & ATA_TFLAG_WRITE)) + hflags |= QS_HF_DIRO; + if ((qc->tf.flags & ATA_TFLAG_LBA48)) + dflags |= QS_DF_ELBA; + + /* host control block (HCB) */ + buf[ 0] = QS_HCB_HDR; + buf[ 1] = hflags; + *(__le32 *)(&buf[ 4]) = cpu_to_le32(qc->nbytes); + *(__le32 *)(&buf[ 8]) = cpu_to_le32(nelem); + addr = ((u64)pp->pkt_dma) + QS_CPB_BYTES; + *(__le64 *)(&buf[16]) = cpu_to_le64(addr); + + /* device control block (DCB) */ + buf[24] = QS_DCB_HDR; + buf[28] = dflags; + + /* frame information structure (FIS) */ + ata_tf_to_fis(&qc->tf, 0, 1, &buf[32]); +} + +static inline void qs_packet_start(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000); + + VPRINTK("ENTER, ap %p\n", ap); + + writeb(QS_CTR0_CLER, chan + QS_CCT_CTR0); + wmb(); /* flush PRDs and pkt to memory */ + writel(QS_CCF_RUN_PKT, chan + QS_CCT_CFF); + readl(chan + QS_CCT_CFF); /* flush */ +} + +static unsigned int qs_qc_issue(struct ata_queued_cmd *qc) +{ + struct qs_port_priv *pp = qc->ap->private_data; + + switch (qc->tf.protocol) { + case ATA_PROT_DMA: + pp->state = qs_state_pkt; + qs_packet_start(qc); + return 0; + + case ATAPI_PROT_DMA: + BUG(); + break; + + default: + break; + } + + pp->state = qs_state_mmio; + return ata_sff_qc_issue(qc); +} + +static void qs_do_or_die(struct ata_queued_cmd *qc, u8 status) +{ + qc->err_mask |= ac_err_mask(status); + + if (!qc->err_mask) { + ata_qc_complete(qc); + } else { + struct ata_port *ap = qc->ap; + struct ata_eh_info *ehi = &ap->link.eh_info; + + ata_ehi_clear_desc(ehi); + ata_ehi_push_desc(ehi, "status 0x%02X", status); + + if (qc->err_mask == AC_ERR_DEV) + ata_port_abort(ap); + else + ata_port_freeze(ap); + } +} + +static inline unsigned int qs_intr_pkt(struct ata_host *host) +{ + unsigned int handled = 0; + u8 sFFE; + u8 __iomem *mmio_base = qs_mmio_base(host); + + do { + u32 sff0 = readl(mmio_base + QS_HST_SFF); + u32 sff1 = readl(mmio_base + QS_HST_SFF + 4); + u8 sEVLD = (sff1 >> 30) & 0x01; /* valid flag */ + sFFE = sff1 >> 31; /* empty flag */ + + if (sEVLD) { + u8 sDST = sff0 >> 16; /* dev status */ + u8 sHST = sff1 & 0x3f; /* host status */ + unsigned int port_no = (sff1 >> 8) & 0x03; + struct ata_port *ap = host->ports[port_no]; + struct qs_port_priv *pp = ap->private_data; + struct ata_queued_cmd *qc; + + DPRINTK("SFF=%08x%08x: sCHAN=%u sHST=%d sDST=%02x\n", + sff1, sff0, port_no, sHST, sDST); + handled = 1; + if (!pp || pp->state != qs_state_pkt) + continue; + qc = ata_qc_from_tag(ap, ap->link.active_tag); + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { + switch (sHST) { + case 0: /* successful CPB */ + case 3: /* device error */ + qs_enter_reg_mode(qc->ap); + qs_do_or_die(qc, sDST); + break; + default: + break; + } + } + } + } while (!sFFE); + return handled; +} + +static inline unsigned int qs_intr_mmio(struct ata_host *host) +{ + unsigned int handled = 0, port_no; + + for (port_no = 0; port_no < host->n_ports; ++port_no) { + struct ata_port *ap = host->ports[port_no]; + struct qs_port_priv *pp = ap->private_data; + struct ata_queued_cmd *qc; + + qc = ata_qc_from_tag(ap, ap->link.active_tag); + if (!qc) { + /* + * The qstor hardware generates spurious + * interrupts from time to time when switching + * in and out of packet mode. There's no + * obvious way to know if we're here now due + * to that, so just ack the irq and pretend we + * knew it was ours.. (ugh). This does not + * affect packet mode. + */ + ata_sff_check_status(ap); + handled = 1; + continue; + } + + if (!pp || pp->state != qs_state_mmio) + continue; + if (!(qc->tf.flags & ATA_TFLAG_POLLING)) + handled |= ata_sff_port_intr(ap, qc); + } + return handled; +} + +static irqreturn_t qs_intr(int irq, void *dev_instance) +{ + struct ata_host *host = dev_instance; + unsigned int handled = 0; + unsigned long flags; + + VPRINTK("ENTER\n"); + + spin_lock_irqsave(&host->lock, flags); + handled = qs_intr_pkt(host) | qs_intr_mmio(host); + spin_unlock_irqrestore(&host->lock, flags); + + VPRINTK("EXIT\n"); + + return IRQ_RETVAL(handled); +} + +static void qs_ata_setup_port(struct ata_ioports *port, void __iomem *base) +{ + port->cmd_addr = + port->data_addr = base + 0x400; + port->error_addr = + port->feature_addr = base + 0x408; /* hob_feature = 0x409 */ + port->nsect_addr = base + 0x410; /* hob_nsect = 0x411 */ + port->lbal_addr = base + 0x418; /* hob_lbal = 0x419 */ + port->lbam_addr = base + 0x420; /* hob_lbam = 0x421 */ + port->lbah_addr = base + 0x428; /* hob_lbah = 0x429 */ + port->device_addr = base + 0x430; + port->status_addr = + port->command_addr = base + 0x438; + port->altstatus_addr = + port->ctl_addr = base + 0x440; + port->scr_addr = base + 0xc00; +} + +static int qs_port_start(struct ata_port *ap) +{ + struct device *dev = ap->host->dev; + struct qs_port_priv *pp; + void __iomem *mmio_base = qs_mmio_base(ap->host); + void __iomem *chan = mmio_base + (ap->port_no * 0x4000); + u64 addr; + + pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); + if (!pp) + return -ENOMEM; + pp->pkt = dmam_alloc_coherent(dev, QS_PKT_BYTES, &pp->pkt_dma, + GFP_KERNEL); + if (!pp->pkt) + return -ENOMEM; + memset(pp->pkt, 0, QS_PKT_BYTES); + ap->private_data = pp; + + qs_enter_reg_mode(ap); + addr = (u64)pp->pkt_dma; + writel((u32) addr, chan + QS_CCF_CPBA); + writel((u32)(addr >> 32), chan + QS_CCF_CPBA + 4); + return 0; +} + +static void qs_host_stop(struct ata_host *host) +{ + void __iomem *mmio_base = qs_mmio_base(host); + + writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */ + writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */ +} + +static void qs_host_init(struct ata_host *host, unsigned int chip_id) +{ + void __iomem *mmio_base = host->iomap[QS_MMIO_BAR]; + unsigned int port_no; + + writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */ + writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */ + + /* reset each channel in turn */ + for (port_no = 0; port_no < host->n_ports; ++port_no) { + u8 __iomem *chan = mmio_base + (port_no * 0x4000); + writeb(QS_CTR1_RDEV|QS_CTR1_RCHN, chan + QS_CCT_CTR1); + writeb(QS_CTR0_REG, chan + QS_CCT_CTR0); + readb(chan + QS_CCT_CTR0); /* flush */ + } + writeb(QS_SERD3_PHY_ENA, mmio_base + QS_HVS_SERD3); /* enable phy */ + + for (port_no = 0; port_no < host->n_ports; ++port_no) { + u8 __iomem *chan = mmio_base + (port_no * 0x4000); + /* set FIFO depths to same settings as Windows driver */ + writew(32, chan + QS_CFC_HUFT); + writew(32, chan + QS_CFC_HDFT); + writew(10, chan + QS_CFC_DUFT); + writew( 8, chan + QS_CFC_DDFT); + /* set CPB size in bytes, as a power of two */ + writeb(QS_CPB_ORDER, chan + QS_CCF_CSEP); + } + writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */ +} + +/* + * The QStor understands 64-bit buses, and uses 64-bit fields + * for DMA pointers regardless of bus width. We just have to + * make sure our DMA masks are set appropriately for whatever + * bridge lies between us and the QStor, and then the DMA mapping + * code will ensure we only ever "see" appropriate buffer addresses. + * If we're 32-bit limited somewhere, then our 64-bit fields will + * just end up with zeros in the upper 32-bits, without any special + * logic required outside of this routine (below). + */ +static int qs_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base) +{ + u32 bus_info = readl(mmio_base + QS_HID_HPHY); + int rc, have_64bit_bus = (bus_info & QS_HPHY_64BIT); + + if (have_64bit_bus && + !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { + rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); + if (rc) { + rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (rc) { + dev_err(&pdev->dev, + "64-bit DMA enable failed\n"); + return rc; + } + } + } else { + rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (rc) { + dev_err(&pdev->dev, "32-bit DMA enable failed\n"); + return rc; + } + rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (rc) { + dev_err(&pdev->dev, + "32-bit consistent DMA enable failed\n"); + return rc; + } + } + return 0; +} + +static int qs_ata_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + unsigned int board_idx = (unsigned int) ent->driver_data; + const struct ata_port_info *ppi[] = { &qs_port_info[board_idx], NULL }; + struct ata_host *host; + int rc, port_no; + + ata_print_version_once(&pdev->dev, DRV_VERSION); + + /* alloc host */ + host = ata_host_alloc_pinfo(&pdev->dev, ppi, QS_PORTS); + if (!host) + return -ENOMEM; + + /* acquire resources and fill host */ + rc = pcim_enable_device(pdev); + if (rc) + return rc; + + if ((pci_resource_flags(pdev, QS_MMIO_BAR) & IORESOURCE_MEM) == 0) + return -ENODEV; + + rc = pcim_iomap_regions(pdev, 1 << QS_MMIO_BAR, DRV_NAME); + if (rc) + return rc; + host->iomap = pcim_iomap_table(pdev); + + rc = qs_set_dma_masks(pdev, host->iomap[QS_MMIO_BAR]); + if (rc) + return rc; + + for (port_no = 0; port_no < host->n_ports; ++port_no) { + struct ata_port *ap = host->ports[port_no]; + unsigned int offset = port_no * 0x4000; + void __iomem *chan = host->iomap[QS_MMIO_BAR] + offset; + + qs_ata_setup_port(&ap->ioaddr, chan); + + ata_port_pbar_desc(ap, QS_MMIO_BAR, -1, "mmio"); + ata_port_pbar_desc(ap, QS_MMIO_BAR, offset, "port"); + } + + /* initialize adapter */ + qs_host_init(host, board_idx); + + pci_set_master(pdev); + return ata_host_activate(host, pdev->irq, qs_intr, IRQF_SHARED, + &qs_ata_sht); +} + +module_pci_driver(qs_ata_pci_driver); + +MODULE_AUTHOR("Mark Lord"); +MODULE_DESCRIPTION("Pacific Digital Corporation QStor SATA low-level driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, qs_ata_pci_tbl); +MODULE_VERSION(DRV_VERSION); -- cgit v1.2.3