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Diffstat (limited to '')
| -rw-r--r-- | drivers/ata/sata_promise.c | 1270 |
1 files changed, 1270 insertions, 0 deletions
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c new file mode 100644 index 000000000..29d2bb465 --- /dev/null +++ b/drivers/ata/sata_promise.c @@ -0,0 +1,1270 @@ +/* + * sata_promise.c - Promise SATA + * + * Maintained by: Tejun Heo <tj@kernel.org> + * Mikael Pettersson + * Please ALWAYS copy linux-ide@vger.kernel.org + * on emails. + * + * Copyright 2003-2004 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/driver-api/libata.rst + * + * Hardware information only available under NDA. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/gfp.h> +#include <linux/pci.h> +#include <linux/blkdev.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <scsi/scsi.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_cmnd.h> +#include <linux/libata.h> +#include "sata_promise.h" + +#define DRV_NAME "sata_promise" +#define DRV_VERSION "2.12" + +enum { + PDC_MAX_PORTS = 4, + PDC_MMIO_BAR = 3, + PDC_MAX_PRD = LIBATA_MAX_PRD - 1, /* -1 for ASIC PRD bug workaround */ + + /* host register offsets (from host->iomap[PDC_MMIO_BAR]) */ + PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */ + PDC_FLASH_CTL = 0x44, /* Flash control register */ + PDC_PCI_CTL = 0x48, /* PCI control/status reg */ + PDC_SATA_PLUG_CSR = 0x6C, /* SATA Plug control/status reg */ + PDC2_SATA_PLUG_CSR = 0x60, /* SATAII Plug control/status reg */ + PDC_TBG_MODE = 0x41C, /* TBG mode (not SATAII) */ + PDC_SLEW_CTL = 0x470, /* slew rate control reg (not SATAII) */ + + /* per-port ATA register offsets (from ap->ioaddr.cmd_addr) */ + PDC_FEATURE = 0x04, /* Feature/Error reg (per port) */ + PDC_SECTOR_COUNT = 0x08, /* Sector count reg (per port) */ + PDC_SECTOR_NUMBER = 0x0C, /* Sector number reg (per port) */ + PDC_CYLINDER_LOW = 0x10, /* Cylinder low reg (per port) */ + PDC_CYLINDER_HIGH = 0x14, /* Cylinder high reg (per port) */ + PDC_DEVICE = 0x18, /* Device/Head reg (per port) */ + PDC_COMMAND = 0x1C, /* Command/status reg (per port) */ + PDC_ALTSTATUS = 0x38, /* Alternate-status/device-control reg (per port) */ + PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */ + PDC_GLOBAL_CTL = 0x48, /* Global control/status (per port) */ + PDC_CTLSTAT = 0x60, /* IDE control and status (per port) */ + + /* per-port SATA register offsets (from ap->ioaddr.scr_addr) */ + PDC_SATA_ERROR = 0x04, + PDC_PHYMODE4 = 0x14, + PDC_LINK_LAYER_ERRORS = 0x6C, + PDC_FPDMA_CTLSTAT = 0xD8, + PDC_INTERNAL_DEBUG_1 = 0xF8, /* also used for PATA */ + PDC_INTERNAL_DEBUG_2 = 0xFC, /* also used for PATA */ + + /* PDC_FPDMA_CTLSTAT bit definitions */ + PDC_FPDMA_CTLSTAT_RESET = 1 << 3, + PDC_FPDMA_CTLSTAT_DMASETUP_INT_FLAG = 1 << 10, + PDC_FPDMA_CTLSTAT_SETDB_INT_FLAG = 1 << 11, + + /* PDC_GLOBAL_CTL bit definitions */ + PDC_PH_ERR = (1 << 8), /* PCI error while loading packet */ + PDC_SH_ERR = (1 << 9), /* PCI error while loading S/G table */ + PDC_DH_ERR = (1 << 10), /* PCI error while loading data */ + PDC2_HTO_ERR = (1 << 12), /* host bus timeout */ + PDC2_ATA_HBA_ERR = (1 << 13), /* error during SATA DATA FIS transmission */ + PDC2_ATA_DMA_CNT_ERR = (1 << 14), /* DMA DATA FIS size differs from S/G count */ + PDC_OVERRUN_ERR = (1 << 19), /* S/G byte count larger than HD requires */ + PDC_UNDERRUN_ERR = (1 << 20), /* S/G byte count less than HD requires */ + PDC_DRIVE_ERR = (1 << 21), /* drive error */ + PDC_PCI_SYS_ERR = (1 << 22), /* PCI system error */ + PDC1_PCI_PARITY_ERR = (1 << 23), /* PCI parity error (from SATA150 driver) */ + PDC1_ERR_MASK = PDC1_PCI_PARITY_ERR, + PDC2_ERR_MASK = PDC2_HTO_ERR | PDC2_ATA_HBA_ERR | + PDC2_ATA_DMA_CNT_ERR, + PDC_ERR_MASK = PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | + PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR | + PDC_DRIVE_ERR | PDC_PCI_SYS_ERR | + PDC1_ERR_MASK | PDC2_ERR_MASK, + + board_2037x = 0, /* FastTrak S150 TX2plus */ + board_2037x_pata = 1, /* FastTrak S150 TX2plus PATA port */ + board_20319 = 2, /* FastTrak S150 TX4 */ + board_20619 = 3, /* FastTrak TX4000 */ + board_2057x = 4, /* SATAII150 Tx2plus */ + board_2057x_pata = 5, /* SATAII150 Tx2plus PATA port */ + board_40518 = 6, /* SATAII150 Tx4 */ + + PDC_HAS_PATA = (1 << 1), /* PDC20375/20575 has PATA */ + + /* Sequence counter control registers bit definitions */ + PDC_SEQCNTRL_INT_MASK = (1 << 5), /* Sequence Interrupt Mask */ + + /* Feature register values */ + PDC_FEATURE_ATAPI_PIO = 0x00, /* ATAPI data xfer by PIO */ + PDC_FEATURE_ATAPI_DMA = 0x01, /* ATAPI data xfer by DMA */ + + /* Device/Head register values */ + PDC_DEVICE_SATA = 0xE0, /* Device/Head value for SATA devices */ + + /* PDC_CTLSTAT bit definitions */ + PDC_DMA_ENABLE = (1 << 7), + PDC_IRQ_DISABLE = (1 << 10), + PDC_RESET = (1 << 11), /* HDMA reset */ + + PDC_COMMON_FLAGS = ATA_FLAG_PIO_POLLING, + + /* ap->flags bits */ + PDC_FLAG_GEN_II = (1 << 24), + PDC_FLAG_SATA_PATA = (1 << 25), /* supports SATA + PATA */ + PDC_FLAG_4_PORTS = (1 << 26), /* 4 ports */ +}; + +struct pdc_port_priv { + u8 *pkt; + dma_addr_t pkt_dma; +}; + +struct pdc_host_priv { + spinlock_t hard_reset_lock; +}; + +static int pdc_sata_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); +static int pdc_sata_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); +static int pdc_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); +static int pdc_common_port_start(struct ata_port *ap); +static int pdc_sata_port_start(struct ata_port *ap); +static enum ata_completion_errors pdc_qc_prep(struct ata_queued_cmd *qc); +static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf); +static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf); +static int pdc_check_atapi_dma(struct ata_queued_cmd *qc); +static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc); +static void pdc_irq_clear(struct ata_port *ap); +static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc); +static void pdc_freeze(struct ata_port *ap); +static void pdc_sata_freeze(struct ata_port *ap); +static void pdc_thaw(struct ata_port *ap); +static void pdc_sata_thaw(struct ata_port *ap); +static int pdc_pata_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline); +static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline); +static void pdc_error_handler(struct ata_port *ap); +static void pdc_post_internal_cmd(struct ata_queued_cmd *qc); +static int pdc_pata_cable_detect(struct ata_port *ap); +static int pdc_sata_cable_detect(struct ata_port *ap); + +static struct scsi_host_template pdc_ata_sht = { + ATA_BASE_SHT(DRV_NAME), + .sg_tablesize = PDC_MAX_PRD, + .dma_boundary = ATA_DMA_BOUNDARY, +}; + +static const struct ata_port_operations pdc_common_ops = { + .inherits = &ata_sff_port_ops, + + .sff_tf_load = pdc_tf_load_mmio, + .sff_exec_command = pdc_exec_command_mmio, + .check_atapi_dma = pdc_check_atapi_dma, + .qc_prep = pdc_qc_prep, + .qc_issue = pdc_qc_issue, + + .sff_irq_clear = pdc_irq_clear, + .lost_interrupt = ATA_OP_NULL, + + .post_internal_cmd = pdc_post_internal_cmd, + .error_handler = pdc_error_handler, +}; + +static struct ata_port_operations pdc_sata_ops = { + .inherits = &pdc_common_ops, + .cable_detect = pdc_sata_cable_detect, + .freeze = pdc_sata_freeze, + .thaw = pdc_sata_thaw, + .scr_read = pdc_sata_scr_read, + .scr_write = pdc_sata_scr_write, + .port_start = pdc_sata_port_start, + .hardreset = pdc_sata_hardreset, +}; + +/* First-generation chips need a more restrictive ->check_atapi_dma op, + and ->freeze/thaw that ignore the hotplug controls. */ +static struct ata_port_operations pdc_old_sata_ops = { + .inherits = &pdc_sata_ops, + .freeze = pdc_freeze, + .thaw = pdc_thaw, + .check_atapi_dma = pdc_old_sata_check_atapi_dma, +}; + +static struct ata_port_operations pdc_pata_ops = { + .inherits = &pdc_common_ops, + .cable_detect = pdc_pata_cable_detect, + .freeze = pdc_freeze, + .thaw = pdc_thaw, + .port_start = pdc_common_port_start, + .softreset = pdc_pata_softreset, +}; + +static const struct ata_port_info pdc_port_info[] = { + [board_2037x] = + { + .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA | + PDC_FLAG_SATA_PATA, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &pdc_old_sata_ops, + }, + + [board_2037x_pata] = + { + .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &pdc_pata_ops, + }, + + [board_20319] = + { + .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA | + PDC_FLAG_4_PORTS, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &pdc_old_sata_ops, + }, + + [board_20619] = + { + .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS | + PDC_FLAG_4_PORTS, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &pdc_pata_ops, + }, + + [board_2057x] = + { + .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA | + PDC_FLAG_GEN_II | PDC_FLAG_SATA_PATA, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &pdc_sata_ops, + }, + + [board_2057x_pata] = + { + .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS | + PDC_FLAG_GEN_II, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &pdc_pata_ops, + }, + + [board_40518] = + { + .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA | + PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + .port_ops = &pdc_sata_ops, + }, +}; + +static const struct pci_device_id pdc_ata_pci_tbl[] = { + { PCI_VDEVICE(PROMISE, 0x3371), board_2037x }, + { PCI_VDEVICE(PROMISE, 0x3373), board_2037x }, + { PCI_VDEVICE(PROMISE, 0x3375), board_2037x }, + { PCI_VDEVICE(PROMISE, 0x3376), board_2037x }, + { PCI_VDEVICE(PROMISE, 0x3570), board_2057x }, + { PCI_VDEVICE(PROMISE, 0x3571), board_2057x }, + { PCI_VDEVICE(PROMISE, 0x3574), board_2057x }, + { PCI_VDEVICE(PROMISE, 0x3577), board_2057x }, + { PCI_VDEVICE(PROMISE, 0x3d73), board_2057x }, + { PCI_VDEVICE(PROMISE, 0x3d75), board_2057x }, + + { PCI_VDEVICE(PROMISE, 0x3318), board_20319 }, + { PCI_VDEVICE(PROMISE, 0x3319), board_20319 }, + { PCI_VDEVICE(PROMISE, 0x3515), board_40518 }, + { PCI_VDEVICE(PROMISE, 0x3519), board_40518 }, + { PCI_VDEVICE(PROMISE, 0x3d17), board_40518 }, + { PCI_VDEVICE(PROMISE, 0x3d18), board_40518 }, + + { PCI_VDEVICE(PROMISE, 0x6629), board_20619 }, + + { } /* terminate list */ +}; + +static struct pci_driver pdc_ata_pci_driver = { + .name = DRV_NAME, + .id_table = pdc_ata_pci_tbl, + .probe = pdc_ata_init_one, + .remove = ata_pci_remove_one, +}; + +static int pdc_common_port_start(struct ata_port *ap) +{ + struct device *dev = ap->host->dev; + struct pdc_port_priv *pp; + int rc; + + /* we use the same prd table as bmdma, allocate it */ + rc = ata_bmdma_port_start(ap); + if (rc) + return rc; + + pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); + if (!pp) + return -ENOMEM; + + pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL); + if (!pp->pkt) + return -ENOMEM; + + ap->private_data = pp; + + return 0; +} + +static int pdc_sata_port_start(struct ata_port *ap) +{ + int rc; + + rc = pdc_common_port_start(ap); + if (rc) + return rc; + + /* fix up PHYMODE4 align timing */ + if (ap->flags & PDC_FLAG_GEN_II) { + void __iomem *sata_mmio = ap->ioaddr.scr_addr; + unsigned int tmp; + + tmp = readl(sata_mmio + PDC_PHYMODE4); + tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */ + writel(tmp, sata_mmio + PDC_PHYMODE4); + } + + return 0; +} + +static void pdc_fpdma_clear_interrupt_flag(struct ata_port *ap) +{ + void __iomem *sata_mmio = ap->ioaddr.scr_addr; + u32 tmp; + + tmp = readl(sata_mmio + PDC_FPDMA_CTLSTAT); + tmp |= PDC_FPDMA_CTLSTAT_DMASETUP_INT_FLAG; + tmp |= PDC_FPDMA_CTLSTAT_SETDB_INT_FLAG; + + /* It's not allowed to write to the entire FPDMA_CTLSTAT register + when NCQ is running. So do a byte-sized write to bits 10 and 11. */ + writeb(tmp >> 8, sata_mmio + PDC_FPDMA_CTLSTAT + 1); + readb(sata_mmio + PDC_FPDMA_CTLSTAT + 1); /* flush */ +} + +static void pdc_fpdma_reset(struct ata_port *ap) +{ + void __iomem *sata_mmio = ap->ioaddr.scr_addr; + u8 tmp; + + tmp = (u8)readl(sata_mmio + PDC_FPDMA_CTLSTAT); + tmp &= 0x7F; + tmp |= PDC_FPDMA_CTLSTAT_RESET; + writeb(tmp, sata_mmio + PDC_FPDMA_CTLSTAT); + readl(sata_mmio + PDC_FPDMA_CTLSTAT); /* flush */ + udelay(100); + tmp &= ~PDC_FPDMA_CTLSTAT_RESET; + writeb(tmp, sata_mmio + PDC_FPDMA_CTLSTAT); + readl(sata_mmio + PDC_FPDMA_CTLSTAT); /* flush */ + + pdc_fpdma_clear_interrupt_flag(ap); +} + +static void pdc_not_at_command_packet_phase(struct ata_port *ap) +{ + void __iomem *sata_mmio = ap->ioaddr.scr_addr; + unsigned int i; + u32 tmp; + + /* check not at ASIC packet command phase */ + for (i = 0; i < 100; ++i) { + writel(0, sata_mmio + PDC_INTERNAL_DEBUG_1); + tmp = readl(sata_mmio + PDC_INTERNAL_DEBUG_2); + if ((tmp & 0xF) != 1) + break; + udelay(100); + } +} + +static void pdc_clear_internal_debug_record_error_register(struct ata_port *ap) +{ + void __iomem *sata_mmio = ap->ioaddr.scr_addr; + + writel(0xffffffff, sata_mmio + PDC_SATA_ERROR); + writel(0xffff0000, sata_mmio + PDC_LINK_LAYER_ERRORS); +} + +static void pdc_reset_port(struct ata_port *ap) +{ + void __iomem *ata_ctlstat_mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT; + unsigned int i; + u32 tmp; + + if (ap->flags & PDC_FLAG_GEN_II) + pdc_not_at_command_packet_phase(ap); + + tmp = readl(ata_ctlstat_mmio); + tmp |= PDC_RESET; + writel(tmp, ata_ctlstat_mmio); + + for (i = 11; i > 0; i--) { + tmp = readl(ata_ctlstat_mmio); + if (tmp & PDC_RESET) + break; + + udelay(100); + + tmp |= PDC_RESET; + writel(tmp, ata_ctlstat_mmio); + } + + tmp &= ~PDC_RESET; + writel(tmp, ata_ctlstat_mmio); + readl(ata_ctlstat_mmio); /* flush */ + + if (sata_scr_valid(&ap->link) && (ap->flags & PDC_FLAG_GEN_II)) { + pdc_fpdma_reset(ap); + pdc_clear_internal_debug_record_error_register(ap); + } +} + +static int pdc_pata_cable_detect(struct ata_port *ap) +{ + u8 tmp; + void __iomem *ata_mmio = ap->ioaddr.cmd_addr; + + tmp = readb(ata_mmio + PDC_CTLSTAT + 3); + if (tmp & 0x01) + return ATA_CBL_PATA40; + return ATA_CBL_PATA80; +} + +static int pdc_sata_cable_detect(struct ata_port *ap) +{ + return ATA_CBL_SATA; +} + +static int pdc_sata_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 * 4)); + return 0; +} + +static int pdc_sata_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 * 4)); + return 0; +} + +static void pdc_atapi_pkt(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + dma_addr_t sg_table = ap->bmdma_prd_dma; + unsigned int cdb_len = qc->dev->cdb_len; + u8 *cdb = qc->cdb; + struct pdc_port_priv *pp = ap->private_data; + u8 *buf = pp->pkt; + __le32 *buf32 = (__le32 *) buf; + unsigned int dev_sel, feature; + + /* set control bits (byte 0), zero delay seq id (byte 3), + * and seq id (byte 2) + */ + switch (qc->tf.protocol) { + case ATAPI_PROT_DMA: + if (!(qc->tf.flags & ATA_TFLAG_WRITE)) + buf32[0] = cpu_to_le32(PDC_PKT_READ); + else + buf32[0] = 0; + break; + case ATAPI_PROT_NODATA: + buf32[0] = cpu_to_le32(PDC_PKT_NODATA); + break; + default: + BUG(); + break; + } + buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */ + buf32[2] = 0; /* no next-packet */ + + /* select drive */ + if (sata_scr_valid(&ap->link)) + dev_sel = PDC_DEVICE_SATA; + else + dev_sel = qc->tf.device; + + buf[12] = (1 << 5) | ATA_REG_DEVICE; + buf[13] = dev_sel; + buf[14] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_CLEAR_BSY; + buf[15] = dev_sel; /* once more, waiting for BSY to clear */ + + buf[16] = (1 << 5) | ATA_REG_NSECT; + buf[17] = qc->tf.nsect; + buf[18] = (1 << 5) | ATA_REG_LBAL; + buf[19] = qc->tf.lbal; + + /* set feature and byte counter registers */ + if (qc->tf.protocol != ATAPI_PROT_DMA) + feature = PDC_FEATURE_ATAPI_PIO; + else + feature = PDC_FEATURE_ATAPI_DMA; + + buf[20] = (1 << 5) | ATA_REG_FEATURE; + buf[21] = feature; + buf[22] = (1 << 5) | ATA_REG_BYTEL; + buf[23] = qc->tf.lbam; + buf[24] = (1 << 5) | ATA_REG_BYTEH; + buf[25] = qc->tf.lbah; + + /* send ATAPI packet command 0xA0 */ + buf[26] = (1 << 5) | ATA_REG_CMD; + buf[27] = qc->tf.command; + + /* select drive and check DRQ */ + buf[28] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_WAIT_DRDY; + buf[29] = dev_sel; + + /* we can represent cdb lengths 2/4/6/8/10/12/14/16 */ + BUG_ON(cdb_len & ~0x1E); + + /* append the CDB as the final part */ + buf[30] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG; + memcpy(buf+31, cdb, cdb_len); +} + +/** + * pdc_fill_sg - Fill PCI IDE PRD table + * @qc: Metadata associated with taskfile to be transferred + * + * Fill PCI IDE PRD (scatter-gather) table with segments + * associated with the current disk command. + * Make sure hardware does not choke on it. + * + * LOCKING: + * spin_lock_irqsave(host lock) + * + */ +static void pdc_fill_sg(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct ata_bmdma_prd *prd = ap->bmdma_prd; + struct scatterlist *sg; + const u32 SG_COUNT_ASIC_BUG = 41*4; + unsigned int si, idx; + u32 len; + + if (!(qc->flags & ATA_QCFLAG_DMAMAP)) + return; + + idx = 0; + for_each_sg(qc->sg, sg, qc->n_elem, si) { + u32 addr, offset; + u32 sg_len; + + /* determine if physical DMA addr spans 64K boundary. + * Note h/w doesn't support 64-bit, so we unconditionally + * truncate dma_addr_t to u32. + */ + addr = (u32) sg_dma_address(sg); + sg_len = sg_dma_len(sg); + + while (sg_len) { + offset = addr & 0xffff; + len = sg_len; + if ((offset + sg_len) > 0x10000) + len = 0x10000 - offset; + + prd[idx].addr = cpu_to_le32(addr); + prd[idx].flags_len = cpu_to_le32(len & 0xffff); + VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); + + idx++; + sg_len -= len; + addr += len; + } + } + + len = le32_to_cpu(prd[idx - 1].flags_len); + + if (len > SG_COUNT_ASIC_BUG) { + u32 addr; + + VPRINTK("Splitting last PRD.\n"); + + addr = le32_to_cpu(prd[idx - 1].addr); + prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG); + VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG); + + addr = addr + len - SG_COUNT_ASIC_BUG; + len = SG_COUNT_ASIC_BUG; + prd[idx].addr = cpu_to_le32(addr); + prd[idx].flags_len = cpu_to_le32(len); + VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); + + idx++; + } + + prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); +} + +static enum ata_completion_errors pdc_qc_prep(struct ata_queued_cmd *qc) +{ + struct pdc_port_priv *pp = qc->ap->private_data; + unsigned int i; + + VPRINTK("ENTER\n"); + + switch (qc->tf.protocol) { + case ATA_PROT_DMA: + pdc_fill_sg(qc); + /*FALLTHROUGH*/ + case ATA_PROT_NODATA: + i = pdc_pkt_header(&qc->tf, qc->ap->bmdma_prd_dma, + qc->dev->devno, pp->pkt); + if (qc->tf.flags & ATA_TFLAG_LBA48) + i = pdc_prep_lba48(&qc->tf, pp->pkt, i); + else + i = pdc_prep_lba28(&qc->tf, pp->pkt, i); + pdc_pkt_footer(&qc->tf, pp->pkt, i); + break; + case ATAPI_PROT_PIO: + pdc_fill_sg(qc); + break; + case ATAPI_PROT_DMA: + pdc_fill_sg(qc); + /*FALLTHROUGH*/ + case ATAPI_PROT_NODATA: + pdc_atapi_pkt(qc); + break; + default: + break; + } + + return AC_ERR_OK; +} + +static int pdc_is_sataii_tx4(unsigned long flags) +{ + const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS; + return (flags & mask) == mask; +} + +static unsigned int pdc_port_no_to_ata_no(unsigned int port_no, + int is_sataii_tx4) +{ + static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2}; + return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no; +} + +static unsigned int pdc_sata_nr_ports(const struct ata_port *ap) +{ + return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2; +} + +static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap) +{ + const struct ata_host *host = ap->host; + unsigned int nr_ports = pdc_sata_nr_ports(ap); + unsigned int i; + + for (i = 0; i < nr_ports && host->ports[i] != ap; ++i) + ; + BUG_ON(i >= nr_ports); + return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags)); +} + +static void pdc_freeze(struct ata_port *ap) +{ + void __iomem *ata_mmio = ap->ioaddr.cmd_addr; + u32 tmp; + + tmp = readl(ata_mmio + PDC_CTLSTAT); + tmp |= PDC_IRQ_DISABLE; + tmp &= ~PDC_DMA_ENABLE; + writel(tmp, ata_mmio + PDC_CTLSTAT); + readl(ata_mmio + PDC_CTLSTAT); /* flush */ +} + +static void pdc_sata_freeze(struct ata_port *ap) +{ + struct ata_host *host = ap->host; + void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR]; + unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR; + unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap); + u32 hotplug_status; + + /* Disable hotplug events on this port. + * + * Locking: + * 1) hotplug register accesses must be serialised via host->lock + * 2) ap->lock == &ap->host->lock + * 3) ->freeze() and ->thaw() are called with ap->lock held + */ + hotplug_status = readl(host_mmio + hotplug_offset); + hotplug_status |= 0x11 << (ata_no + 16); + writel(hotplug_status, host_mmio + hotplug_offset); + readl(host_mmio + hotplug_offset); /* flush */ + + pdc_freeze(ap); +} + +static void pdc_thaw(struct ata_port *ap) +{ + void __iomem *ata_mmio = ap->ioaddr.cmd_addr; + u32 tmp; + + /* clear IRQ */ + readl(ata_mmio + PDC_COMMAND); + + /* turn IRQ back on */ + tmp = readl(ata_mmio + PDC_CTLSTAT); + tmp &= ~PDC_IRQ_DISABLE; + writel(tmp, ata_mmio + PDC_CTLSTAT); + readl(ata_mmio + PDC_CTLSTAT); /* flush */ +} + +static void pdc_sata_thaw(struct ata_port *ap) +{ + struct ata_host *host = ap->host; + void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR]; + unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR; + unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap); + u32 hotplug_status; + + pdc_thaw(ap); + + /* Enable hotplug events on this port. + * Locking: see pdc_sata_freeze(). + */ + hotplug_status = readl(host_mmio + hotplug_offset); + hotplug_status |= 0x11 << ata_no; + hotplug_status &= ~(0x11 << (ata_no + 16)); + writel(hotplug_status, host_mmio + hotplug_offset); + readl(host_mmio + hotplug_offset); /* flush */ +} + +static int pdc_pata_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + pdc_reset_port(link->ap); + return ata_sff_softreset(link, class, deadline); +} + +static unsigned int pdc_ata_port_to_ata_no(const struct ata_port *ap) +{ + void __iomem *ata_mmio = ap->ioaddr.cmd_addr; + void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR]; + + /* ata_mmio == host_mmio + 0x200 + ata_no * 0x80 */ + return (ata_mmio - host_mmio - 0x200) / 0x80; +} + +static void pdc_hard_reset_port(struct ata_port *ap) +{ + void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR]; + void __iomem *pcictl_b1_mmio = host_mmio + PDC_PCI_CTL + 1; + unsigned int ata_no = pdc_ata_port_to_ata_no(ap); + struct pdc_host_priv *hpriv = ap->host->private_data; + u8 tmp; + + spin_lock(&hpriv->hard_reset_lock); + + tmp = readb(pcictl_b1_mmio); + tmp &= ~(0x10 << ata_no); + writeb(tmp, pcictl_b1_mmio); + readb(pcictl_b1_mmio); /* flush */ + udelay(100); + tmp |= (0x10 << ata_no); + writeb(tmp, pcictl_b1_mmio); + readb(pcictl_b1_mmio); /* flush */ + + spin_unlock(&hpriv->hard_reset_lock); +} + +static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + if (link->ap->flags & PDC_FLAG_GEN_II) + pdc_not_at_command_packet_phase(link->ap); + /* hotplug IRQs should have been masked by pdc_sata_freeze() */ + pdc_hard_reset_port(link->ap); + pdc_reset_port(link->ap); + + /* sata_promise can't reliably acquire the first D2H Reg FIS + * after hardreset. Do non-waiting hardreset and request + * follow-up SRST. + */ + return sata_std_hardreset(link, class, deadline); +} + +static void pdc_error_handler(struct ata_port *ap) +{ + if (!(ap->pflags & ATA_PFLAG_FROZEN)) + pdc_reset_port(ap); + + ata_sff_error_handler(ap); +} + +static void pdc_post_internal_cmd(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + + /* make DMA engine forget about the failed command */ + if (qc->flags & ATA_QCFLAG_FAILED) + pdc_reset_port(ap); +} + +static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc, + u32 port_status, u32 err_mask) +{ + struct ata_eh_info *ehi = &ap->link.eh_info; + unsigned int ac_err_mask = 0; + + ata_ehi_clear_desc(ehi); + ata_ehi_push_desc(ehi, "port_status 0x%08x", port_status); + port_status &= err_mask; + + if (port_status & PDC_DRIVE_ERR) + ac_err_mask |= AC_ERR_DEV; + if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR)) + ac_err_mask |= AC_ERR_OTHER; + if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR)) + ac_err_mask |= AC_ERR_ATA_BUS; + if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR + | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR)) + ac_err_mask |= AC_ERR_HOST_BUS; + + if (sata_scr_valid(&ap->link)) { + u32 serror; + + pdc_sata_scr_read(&ap->link, SCR_ERROR, &serror); + ehi->serror |= serror; + } + + qc->err_mask |= ac_err_mask; + + pdc_reset_port(ap); + + ata_port_abort(ap); +} + +static unsigned int pdc_host_intr(struct ata_port *ap, + struct ata_queued_cmd *qc) +{ + unsigned int handled = 0; + void __iomem *ata_mmio = ap->ioaddr.cmd_addr; + u32 port_status, err_mask; + + err_mask = PDC_ERR_MASK; + if (ap->flags & PDC_FLAG_GEN_II) + err_mask &= ~PDC1_ERR_MASK; + else + err_mask &= ~PDC2_ERR_MASK; + port_status = readl(ata_mmio + PDC_GLOBAL_CTL); + if (unlikely(port_status & err_mask)) { + pdc_error_intr(ap, qc, port_status, err_mask); + return 1; + } + + switch (qc->tf.protocol) { + case ATA_PROT_DMA: + case ATA_PROT_NODATA: + case ATAPI_PROT_DMA: + case ATAPI_PROT_NODATA: + qc->err_mask |= ac_err_mask(ata_wait_idle(ap)); + ata_qc_complete(qc); + handled = 1; + break; + default: + ap->stats.idle_irq++; + break; + } + + return handled; +} + +static void pdc_irq_clear(struct ata_port *ap) +{ + void __iomem *ata_mmio = ap->ioaddr.cmd_addr; + + readl(ata_mmio + PDC_COMMAND); +} + +static irqreturn_t pdc_interrupt(int irq, void *dev_instance) +{ + struct ata_host *host = dev_instance; + struct ata_port *ap; + u32 mask = 0; + unsigned int i, tmp; + unsigned int handled = 0; + void __iomem *host_mmio; + unsigned int hotplug_offset, ata_no; + u32 hotplug_status; + int is_sataii_tx4; + + VPRINTK("ENTER\n"); + + if (!host || !host->iomap[PDC_MMIO_BAR]) { + VPRINTK("QUICK EXIT\n"); + return IRQ_NONE; + } + + host_mmio = host->iomap[PDC_MMIO_BAR]; + + spin_lock(&host->lock); + + /* read and clear hotplug flags for all ports */ + if (host->ports[0]->flags & PDC_FLAG_GEN_II) { + hotplug_offset = PDC2_SATA_PLUG_CSR; + hotplug_status = readl(host_mmio + hotplug_offset); + if (hotplug_status & 0xff) + writel(hotplug_status | 0xff, host_mmio + hotplug_offset); + hotplug_status &= 0xff; /* clear uninteresting bits */ + } else + hotplug_status = 0; + + /* reading should also clear interrupts */ + mask = readl(host_mmio + PDC_INT_SEQMASK); + + if (mask == 0xffffffff && hotplug_status == 0) { + VPRINTK("QUICK EXIT 2\n"); + goto done_irq; + } + + mask &= 0xffff; /* only 16 SEQIDs possible */ + if (mask == 0 && hotplug_status == 0) { + VPRINTK("QUICK EXIT 3\n"); + goto done_irq; + } + + writel(mask, host_mmio + PDC_INT_SEQMASK); + + is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags); + + for (i = 0; i < host->n_ports; i++) { + VPRINTK("port %u\n", i); + ap = host->ports[i]; + + /* check for a plug or unplug event */ + ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4); + tmp = hotplug_status & (0x11 << ata_no); + if (tmp) { + struct ata_eh_info *ehi = &ap->link.eh_info; + ata_ehi_clear_desc(ehi); + ata_ehi_hotplugged(ehi); + ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp); + ata_port_freeze(ap); + ++handled; + continue; + } + + /* check for a packet interrupt */ + tmp = mask & (1 << (i + 1)); + if (tmp) { + struct ata_queued_cmd *qc; + + qc = ata_qc_from_tag(ap, ap->link.active_tag); + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) + handled += pdc_host_intr(ap, qc); + } + } + + VPRINTK("EXIT\n"); + +done_irq: + spin_unlock(&host->lock); + return IRQ_RETVAL(handled); +} + +static void pdc_packet_start(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct pdc_port_priv *pp = ap->private_data; + void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR]; + void __iomem *ata_mmio = ap->ioaddr.cmd_addr; + unsigned int port_no = ap->port_no; + u8 seq = (u8) (port_no + 1); + + VPRINTK("ENTER, ap %p\n", ap); + + writel(0x00000001, host_mmio + (seq * 4)); + readl(host_mmio + (seq * 4)); /* flush */ + + pp->pkt[2] = seq; + wmb(); /* flush PRD, pkt writes */ + writel(pp->pkt_dma, ata_mmio + PDC_PKT_SUBMIT); + readl(ata_mmio + PDC_PKT_SUBMIT); /* flush */ +} + +static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc) +{ + switch (qc->tf.protocol) { + case ATAPI_PROT_NODATA: + if (qc->dev->flags & ATA_DFLAG_CDB_INTR) + break; + /*FALLTHROUGH*/ + case ATA_PROT_NODATA: + if (qc->tf.flags & ATA_TFLAG_POLLING) + break; + /*FALLTHROUGH*/ + case ATAPI_PROT_DMA: + case ATA_PROT_DMA: + pdc_packet_start(qc); + return 0; + default: + break; + } + return ata_sff_qc_issue(qc); +} + +static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) +{ + WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA); + ata_sff_tf_load(ap, tf); +} + +static void pdc_exec_command_mmio(struct ata_port *ap, + const struct ata_taskfile *tf) +{ + WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA); + ata_sff_exec_command(ap, tf); +} + +static int pdc_check_atapi_dma(struct ata_queued_cmd *qc) +{ + u8 *scsicmd = qc->scsicmd->cmnd; + int pio = 1; /* atapi dma off by default */ + + /* Whitelist commands that may use DMA. */ + switch (scsicmd[0]) { + case WRITE_12: + case WRITE_10: + case WRITE_6: + case READ_12: + case READ_10: + case READ_6: + case 0xad: /* READ_DVD_STRUCTURE */ + case 0xbe: /* READ_CD */ + pio = 0; + } + /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */ + if (scsicmd[0] == WRITE_10) { + unsigned int lba = + (scsicmd[2] << 24) | + (scsicmd[3] << 16) | + (scsicmd[4] << 8) | + scsicmd[5]; + if (lba >= 0xFFFF4FA2) + pio = 1; + } + return pio; +} + +static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc) +{ + /* First generation chips cannot use ATAPI DMA on SATA ports */ + return 1; +} + +static void pdc_ata_setup_port(struct ata_port *ap, + void __iomem *base, void __iomem *scr_addr) +{ + ap->ioaddr.cmd_addr = base; + ap->ioaddr.data_addr = base; + ap->ioaddr.feature_addr = + ap->ioaddr.error_addr = base + 0x4; + ap->ioaddr.nsect_addr = base + 0x8; + ap->ioaddr.lbal_addr = base + 0xc; + ap->ioaddr.lbam_addr = base + 0x10; + ap->ioaddr.lbah_addr = base + 0x14; + ap->ioaddr.device_addr = base + 0x18; + ap->ioaddr.command_addr = + ap->ioaddr.status_addr = base + 0x1c; + ap->ioaddr.altstatus_addr = + ap->ioaddr.ctl_addr = base + 0x38; + ap->ioaddr.scr_addr = scr_addr; +} + +static void pdc_host_init(struct ata_host *host) +{ + void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR]; + int is_gen2 = host->ports[0]->flags & PDC_FLAG_GEN_II; + int hotplug_offset; + u32 tmp; + + if (is_gen2) + hotplug_offset = PDC2_SATA_PLUG_CSR; + else + hotplug_offset = PDC_SATA_PLUG_CSR; + + /* + * Except for the hotplug stuff, this is voodoo from the + * Promise driver. Label this entire section + * "TODO: figure out why we do this" + */ + + /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */ + tmp = readl(host_mmio + PDC_FLASH_CTL); + tmp |= 0x02000; /* bit 13 (enable bmr burst) */ + if (!is_gen2) + tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */ + writel(tmp, host_mmio + PDC_FLASH_CTL); + + /* clear plug/unplug flags for all ports */ + tmp = readl(host_mmio + hotplug_offset); + writel(tmp | 0xff, host_mmio + hotplug_offset); + + tmp = readl(host_mmio + hotplug_offset); + if (is_gen2) /* unmask plug/unplug ints */ + writel(tmp & ~0xff0000, host_mmio + hotplug_offset); + else /* mask plug/unplug ints */ + writel(tmp | 0xff0000, host_mmio + hotplug_offset); + + /* don't initialise TBG or SLEW on 2nd generation chips */ + if (is_gen2) + return; + + /* reduce TBG clock to 133 Mhz. */ + tmp = readl(host_mmio + PDC_TBG_MODE); + tmp &= ~0x30000; /* clear bit 17, 16*/ + tmp |= 0x10000; /* set bit 17:16 = 0:1 */ + writel(tmp, host_mmio + PDC_TBG_MODE); + + readl(host_mmio + PDC_TBG_MODE); /* flush */ + msleep(10); + + /* adjust slew rate control register. */ + tmp = readl(host_mmio + PDC_SLEW_CTL); + tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */ + tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */ + writel(tmp, host_mmio + PDC_SLEW_CTL); +} + +static int pdc_ata_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + const struct ata_port_info *pi = &pdc_port_info[ent->driver_data]; + const struct ata_port_info *ppi[PDC_MAX_PORTS]; + struct ata_host *host; + struct pdc_host_priv *hpriv; + void __iomem *host_mmio; + int n_ports, i, rc; + int is_sataii_tx4; + + ata_print_version_once(&pdev->dev, DRV_VERSION); + + /* enable and acquire resources */ + rc = pcim_enable_device(pdev); + if (rc) + return rc; + + rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME); + if (rc == -EBUSY) + pcim_pin_device(pdev); + if (rc) + return rc; + host_mmio = pcim_iomap_table(pdev)[PDC_MMIO_BAR]; + + /* determine port configuration and setup host */ + n_ports = 2; + if (pi->flags & PDC_FLAG_4_PORTS) + n_ports = 4; + for (i = 0; i < n_ports; i++) + ppi[i] = pi; + + if (pi->flags & PDC_FLAG_SATA_PATA) { + u8 tmp = readb(host_mmio + PDC_FLASH_CTL + 1); + if (!(tmp & 0x80)) + ppi[n_ports++] = pi + 1; + } + + host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports); + if (!host) { + dev_err(&pdev->dev, "failed to allocate host\n"); + return -ENOMEM; + } + hpriv = devm_kzalloc(&pdev->dev, sizeof *hpriv, GFP_KERNEL); + if (!hpriv) + return -ENOMEM; + spin_lock_init(&hpriv->hard_reset_lock); + host->private_data = hpriv; + host->iomap = pcim_iomap_table(pdev); + + is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags); + for (i = 0; i < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4); + unsigned int ata_offset = 0x200 + ata_no * 0x80; + unsigned int scr_offset = 0x400 + ata_no * 0x100; + + pdc_ata_setup_port(ap, host_mmio + ata_offset, host_mmio + scr_offset); + + ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio"); + ata_port_pbar_desc(ap, PDC_MMIO_BAR, ata_offset, "ata"); + } + + /* initialize adapter */ + pdc_host_init(host); + + rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK); + if (rc) + return rc; + rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK); + if (rc) + return rc; + + /* start host, request IRQ and attach */ + pci_set_master(pdev); + return ata_host_activate(host, pdev->irq, pdc_interrupt, IRQF_SHARED, + &pdc_ata_sht); +} + +module_pci_driver(pdc_ata_pci_driver); + +MODULE_AUTHOR("Jeff Garzik"); +MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl); +MODULE_VERSION(DRV_VERSION); |