| /* |
| * ahci.c - AHCI SATA support |
| * |
| * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| * 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 <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/init.h> |
| #include <linux/blkdev.h> |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| #include <linux/sched.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/device.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <linux/libata.h> |
| #include <asm/io.h> |
| |
| #define DRV_NAME "ahci" |
| #define DRV_VERSION "1.2" |
| |
| |
| enum { |
| AHCI_PCI_BAR = 5, |
| AHCI_MAX_SG = 168, /* hardware max is 64K */ |
| AHCI_DMA_BOUNDARY = 0xffffffff, |
| AHCI_USE_CLUSTERING = 0, |
| AHCI_CMD_SLOT_SZ = 32 * 32, |
| AHCI_RX_FIS_SZ = 256, |
| AHCI_CMD_TBL_HDR = 0x80, |
| AHCI_CMD_TBL_CDB = 0x40, |
| AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16), |
| AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ + |
| AHCI_RX_FIS_SZ, |
| AHCI_IRQ_ON_SG = (1 << 31), |
| AHCI_CMD_ATAPI = (1 << 5), |
| AHCI_CMD_WRITE = (1 << 6), |
| |
| RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */ |
| |
| board_ahci = 0, |
| |
| /* global controller registers */ |
| HOST_CAP = 0x00, /* host capabilities */ |
| HOST_CTL = 0x04, /* global host control */ |
| HOST_IRQ_STAT = 0x08, /* interrupt status */ |
| HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */ |
| HOST_VERSION = 0x10, /* AHCI spec. version compliancy */ |
| |
| /* HOST_CTL bits */ |
| HOST_RESET = (1 << 0), /* reset controller; self-clear */ |
| HOST_IRQ_EN = (1 << 1), /* global IRQ enable */ |
| HOST_AHCI_EN = (1 << 31), /* AHCI enabled */ |
| |
| /* HOST_CAP bits */ |
| HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */ |
| |
| /* registers for each SATA port */ |
| PORT_LST_ADDR = 0x00, /* command list DMA addr */ |
| PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */ |
| PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */ |
| PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */ |
| PORT_IRQ_STAT = 0x10, /* interrupt status */ |
| PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */ |
| PORT_CMD = 0x18, /* port command */ |
| PORT_TFDATA = 0x20, /* taskfile data */ |
| PORT_SIG = 0x24, /* device TF signature */ |
| PORT_CMD_ISSUE = 0x38, /* command issue */ |
| PORT_SCR = 0x28, /* SATA phy register block */ |
| PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */ |
| PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */ |
| PORT_SCR_ERR = 0x30, /* SATA phy register: SError */ |
| PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */ |
| |
| /* PORT_IRQ_{STAT,MASK} bits */ |
| PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */ |
| PORT_IRQ_TF_ERR = (1 << 30), /* task file error */ |
| PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */ |
| PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */ |
| PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */ |
| PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */ |
| PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */ |
| PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */ |
| |
| PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */ |
| PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */ |
| PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */ |
| PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */ |
| PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */ |
| PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */ |
| PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */ |
| PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */ |
| PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */ |
| |
| PORT_IRQ_FATAL = PORT_IRQ_TF_ERR | |
| PORT_IRQ_HBUS_ERR | |
| PORT_IRQ_HBUS_DATA_ERR | |
| PORT_IRQ_IF_ERR, |
| DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY | |
| PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE | |
| PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS | |
| PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS | |
| PORT_IRQ_D2H_REG_FIS, |
| |
| /* PORT_CMD bits */ |
| PORT_CMD_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_POWER_ON = (1 << 2), /* Power up device */ |
| PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */ |
| PORT_CMD_START = (1 << 0), /* Enable port DMA engine */ |
| |
| PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */ |
| PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */ |
| PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */ |
| |
| /* hpriv->flags bits */ |
| AHCI_FLAG_MSI = (1 << 0), |
| }; |
| |
| struct ahci_cmd_hdr { |
| u32 opts; |
| u32 status; |
| u32 tbl_addr; |
| u32 tbl_addr_hi; |
| u32 reserved[4]; |
| }; |
| |
| struct ahci_sg { |
| u32 addr; |
| u32 addr_hi; |
| u32 reserved; |
| u32 flags_size; |
| }; |
| |
| struct ahci_host_priv { |
| unsigned long flags; |
| u32 cap; /* cache of HOST_CAP register */ |
| u32 port_map; /* cache of HOST_PORTS_IMPL reg */ |
| }; |
| |
| struct ahci_port_priv { |
| struct ahci_cmd_hdr *cmd_slot; |
| dma_addr_t cmd_slot_dma; |
| void *cmd_tbl; |
| dma_addr_t cmd_tbl_dma; |
| struct ahci_sg *cmd_tbl_sg; |
| void *rx_fis; |
| dma_addr_t rx_fis_dma; |
| }; |
| |
| static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg); |
| static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); |
| static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); |
| static int ahci_qc_issue(struct ata_queued_cmd *qc); |
| static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
| static void ahci_phy_reset(struct ata_port *ap); |
| static void ahci_irq_clear(struct ata_port *ap); |
| static void ahci_eng_timeout(struct ata_port *ap); |
| static int ahci_port_start(struct ata_port *ap); |
| static void ahci_port_stop(struct ata_port *ap); |
| static void ahci_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 inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); |
| static void ahci_remove_one (struct pci_dev *pdev); |
| |
| static struct scsi_host_template ahci_sht = { |
| .module = THIS_MODULE, |
| .name = DRV_NAME, |
| .ioctl = ata_scsi_ioctl, |
| .queuecommand = ata_scsi_queuecmd, |
| .eh_strategy_handler = ata_scsi_error, |
| .can_queue = ATA_DEF_QUEUE, |
| .this_id = ATA_SHT_THIS_ID, |
| .sg_tablesize = AHCI_MAX_SG, |
| .max_sectors = ATA_MAX_SECTORS, |
| .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
| .emulated = ATA_SHT_EMULATED, |
| .use_clustering = AHCI_USE_CLUSTERING, |
| .proc_name = DRV_NAME, |
| .dma_boundary = AHCI_DMA_BOUNDARY, |
| .slave_configure = ata_scsi_slave_config, |
| .bios_param = ata_std_bios_param, |
| }; |
| |
| 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, |
| |
| .phy_reset = ahci_phy_reset, |
| |
| .qc_prep = ahci_qc_prep, |
| .qc_issue = ahci_qc_issue, |
| |
| .eng_timeout = ahci_eng_timeout, |
| |
| .irq_handler = ahci_interrupt, |
| .irq_clear = ahci_irq_clear, |
| |
| .scr_read = ahci_scr_read, |
| .scr_write = ahci_scr_write, |
| |
| .port_start = ahci_port_start, |
| .port_stop = ahci_port_stop, |
| }; |
| |
| static const struct ata_port_info ahci_port_info[] = { |
| /* board_ahci */ |
| { |
| .sht = &ahci_sht, |
| .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | |
| ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | |
| ATA_FLAG_PIO_DMA, |
| .pio_mask = 0x1f, /* pio0-4 */ |
| .udma_mask = 0x7f, /* udma0-6 ; FIXME */ |
| .port_ops = &ahci_ops, |
| }, |
| }; |
| |
| static const struct pci_device_id ahci_pci_tbl[] = { |
| { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH6 */ |
| { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH6M */ |
| { PCI_VENDOR_ID_INTEL, 0x27c1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH7 */ |
| { PCI_VENDOR_ID_INTEL, 0x27c5, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH7M */ |
| { PCI_VENDOR_ID_INTEL, 0x27c3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH7R */ |
| { PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ULi M5288 */ |
| { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ESB2 */ |
| { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ESB2 */ |
| { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ESB2 */ |
| { PCI_VENDOR_ID_INTEL, 0x27c6, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH7-M DH */ |
| { PCI_VENDOR_ID_INTEL, 0x2821, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH8 */ |
| { PCI_VENDOR_ID_INTEL, 0x2822, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH8 */ |
| { PCI_VENDOR_ID_INTEL, 0x2824, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH8 */ |
| { PCI_VENDOR_ID_INTEL, 0x2829, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH8M */ |
| { PCI_VENDOR_ID_INTEL, 0x282a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* ICH8M */ |
| { 0x197b, 0x2360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| board_ahci }, /* JMicron JMB360 */ |
| { } /* terminate list */ |
| }; |
| |
| |
| static struct pci_driver ahci_pci_driver = { |
| .name = DRV_NAME, |
| .id_table = ahci_pci_tbl, |
| .probe = ahci_init_one, |
| .remove = ahci_remove_one, |
| }; |
| |
| |
| static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port) |
| { |
| return base + 0x100 + (port * 0x80); |
| } |
| |
| static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port) |
| { |
| return (void __iomem *) ahci_port_base_ul((unsigned long)base, port); |
| } |
| |
| static int ahci_port_start(struct ata_port *ap) |
| { |
| struct device *dev = ap->host_set->dev; |
| struct ahci_host_priv *hpriv = ap->host_set->private_data; |
| struct ahci_port_priv *pp; |
| void __iomem *mmio = ap->host_set->mmio_base; |
| void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); |
| void *mem; |
| dma_addr_t mem_dma; |
| int rc; |
| |
| pp = kmalloc(sizeof(*pp), GFP_KERNEL); |
| if (!pp) |
| return -ENOMEM; |
| memset(pp, 0, sizeof(*pp)); |
| |
| rc = ata_pad_alloc(ap, dev); |
| if (rc) { |
| kfree(pp); |
| return rc; |
| } |
| |
| mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL); |
| if (!mem) { |
| ata_pad_free(ap, dev); |
| kfree(pp); |
| return -ENOMEM; |
| } |
| memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ); |
| |
| /* |
| * First item in chunk of DMA memory: 32-slot command table, |
| * 32 bytes each in size |
| */ |
| pp->cmd_slot = mem; |
| pp->cmd_slot_dma = mem_dma; |
| |
| mem += AHCI_CMD_SLOT_SZ; |
| mem_dma += AHCI_CMD_SLOT_SZ; |
| |
| /* |
| * Second item: Received-FIS area |
| */ |
| pp->rx_fis = mem; |
| pp->rx_fis_dma = mem_dma; |
| |
| mem += AHCI_RX_FIS_SZ; |
| mem_dma += AHCI_RX_FIS_SZ; |
| |
| /* |
| * Third item: data area for storing a single command |
| * and its scatter-gather table |
| */ |
| pp->cmd_tbl = mem; |
| pp->cmd_tbl_dma = mem_dma; |
| |
| pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR; |
| |
| ap->private_data = pp; |
| |
| if (hpriv->cap & HOST_CAP_64) |
| writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI); |
| writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); |
| readl(port_mmio + PORT_LST_ADDR); /* flush */ |
| |
| if (hpriv->cap & HOST_CAP_64) |
| writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI); |
| writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); |
| readl(port_mmio + PORT_FIS_ADDR); /* flush */ |
| |
| writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX | |
| PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP | |
| PORT_CMD_START, port_mmio + PORT_CMD); |
| readl(port_mmio + PORT_CMD); /* flush */ |
| |
| return 0; |
| } |
| |
| |
| static void ahci_port_stop(struct ata_port *ap) |
| { |
| struct device *dev = ap->host_set->dev; |
| struct ahci_port_priv *pp = ap->private_data; |
| void __iomem *mmio = ap->host_set->mmio_base; |
| void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); |
| u32 tmp; |
| |
| tmp = readl(port_mmio + PORT_CMD); |
| tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX); |
| writel(tmp, port_mmio + PORT_CMD); |
| readl(port_mmio + PORT_CMD); /* flush */ |
| |
| /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so |
| * this is slightly incorrect. |
| */ |
| msleep(500); |
| |
| ap->private_data = NULL; |
| dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, |
| pp->cmd_slot, pp->cmd_slot_dma); |
| ata_pad_free(ap, dev); |
| kfree(pp); |
| } |
| |
| static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in) |
| { |
| unsigned int sc_reg; |
| |
| switch (sc_reg_in) { |
| case SCR_STATUS: sc_reg = 0; break; |
| case SCR_CONTROL: sc_reg = 1; break; |
| case SCR_ERROR: sc_reg = 2; break; |
| case SCR_ACTIVE: sc_reg = 3; break; |
| default: |
| return 0xffffffffU; |
| } |
| |
| return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); |
| } |
| |
| |
| static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in, |
| u32 val) |
| { |
| unsigned int sc_reg; |
| |
| switch (sc_reg_in) { |
| case SCR_STATUS: sc_reg = 0; break; |
| case SCR_CONTROL: sc_reg = 1; break; |
| case SCR_ERROR: sc_reg = 2; break; |
| case SCR_ACTIVE: sc_reg = 3; break; |
| default: |
| return; |
| } |
| |
| writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); |
| } |
| |
| static void ahci_phy_reset(struct ata_port *ap) |
| { |
| void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; |
| struct ata_taskfile tf; |
| struct ata_device *dev = &ap->device[0]; |
| u32 new_tmp, tmp; |
| |
| __sata_phy_reset(ap); |
| |
| if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| return; |
| |
| tmp = readl(port_mmio + PORT_SIG); |
| tf.lbah = (tmp >> 24) & 0xff; |
| tf.lbam = (tmp >> 16) & 0xff; |
| tf.lbal = (tmp >> 8) & 0xff; |
| tf.nsect = (tmp) & 0xff; |
| |
| dev->class = ata_dev_classify(&tf); |
| if (!ata_dev_present(dev)) { |
| ata_port_disable(ap); |
| return; |
| } |
| |
| /* Make sure port's ATAPI bit is set appropriately */ |
| new_tmp = tmp = readl(port_mmio + PORT_CMD); |
| if (dev->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 = (void __iomem *) 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) |
| { |
| struct ahci_port_priv *pp = qc->ap->private_data; |
| struct scatterlist *sg; |
| struct ahci_sg *ahci_sg; |
| unsigned int n_sg = 0; |
| |
| VPRINTK("ENTER\n"); |
| |
| /* |
| * Next, the S/G list. |
| */ |
| ahci_sg = pp->cmd_tbl_sg; |
| 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; |
| u32 opts; |
| const u32 cmd_fis_len = 5; /* five dwords */ |
| unsigned int n_elem; |
| |
| /* |
| * Fill in command slot information (currently only one slot, |
| * slot 0, is currently since we don't do queueing) |
| */ |
| |
| opts = cmd_fis_len; |
| if (qc->tf.flags & ATA_TFLAG_WRITE) |
| opts |= AHCI_CMD_WRITE; |
| if (is_atapi_taskfile(&qc->tf)) |
| opts |= AHCI_CMD_ATAPI; |
| |
| pp->cmd_slot[0].opts = cpu_to_le32(opts); |
| pp->cmd_slot[0].status = 0; |
| pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff); |
| pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16); |
| |
| /* |
| * Fill in command table information. First, the header, |
| * a SATA Register - Host to Device command FIS. |
| */ |
| ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0); |
| if (opts & AHCI_CMD_ATAPI) { |
| memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); |
| memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len); |
| } |
| |
| if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| return; |
| |
| n_elem = ahci_fill_sg(qc); |
| |
| pp->cmd_slot[0].opts |= cpu_to_le32(n_elem << 16); |
| } |
| |
| static void ahci_restart_port(struct ata_port *ap, u32 irq_stat) |
| { |
| void __iomem *mmio = ap->host_set->mmio_base; |
| void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); |
| u32 tmp; |
| int work; |
| |
| if ((ap->device[0].class != ATA_DEV_ATAPI) || |
| ((irq_stat & PORT_IRQ_TF_ERR) == 0)) |
| printk(KERN_WARNING "ata%u: port reset, " |
| "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n", |
| ap->id, |
| irq_stat, |
| readl(mmio + HOST_IRQ_STAT), |
| readl(port_mmio + PORT_IRQ_STAT), |
| readl(port_mmio + PORT_CMD), |
| readl(port_mmio + PORT_TFDATA), |
| readl(port_mmio + PORT_SCR_STAT), |
| readl(port_mmio + PORT_SCR_ERR)); |
| |
| /* stop DMA */ |
| tmp = readl(port_mmio + PORT_CMD); |
| tmp &= ~PORT_CMD_START; |
| writel(tmp, port_mmio + PORT_CMD); |
| |
| /* wait for engine to stop. TODO: this could be |
| * as long as 500 msec |
| */ |
| work = 1000; |
| while (work-- > 0) { |
| tmp = readl(port_mmio + PORT_CMD); |
| if ((tmp & PORT_CMD_LIST_ON) == 0) |
| break; |
| udelay(10); |
| } |
| |
| /* clear SATA phy error, if any */ |
| tmp = readl(port_mmio + PORT_SCR_ERR); |
| writel(tmp, port_mmio + PORT_SCR_ERR); |
| |
| /* if DRQ/BSY is set, device needs to be reset. |
| * if so, issue COMRESET |
| */ |
| tmp = readl(port_mmio + PORT_TFDATA); |
| if (tmp & (ATA_BUSY | ATA_DRQ)) { |
| writel(0x301, port_mmio + PORT_SCR_CTL); |
| readl(port_mmio + PORT_SCR_CTL); /* flush */ |
| udelay(10); |
| writel(0x300, port_mmio + PORT_SCR_CTL); |
| readl(port_mmio + PORT_SCR_CTL); /* flush */ |
| } |
| |
| /* re-start DMA */ |
| tmp = readl(port_mmio + PORT_CMD); |
| tmp |= PORT_CMD_START; |
| writel(tmp, port_mmio + PORT_CMD); |
| readl(port_mmio + PORT_CMD); /* flush */ |
| } |
| |
| static void ahci_eng_timeout(struct ata_port *ap) |
| { |
| struct ata_host_set *host_set = ap->host_set; |
| void __iomem *mmio = host_set->mmio_base; |
| void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); |
| struct ata_queued_cmd *qc; |
| unsigned long flags; |
| |
| printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id); |
| |
| spin_lock_irqsave(&host_set->lock, flags); |
| |
| qc = ata_qc_from_tag(ap, ap->active_tag); |
| if (!qc) { |
| printk(KERN_ERR "ata%u: BUG: timeout without command\n", |
| ap->id); |
| } else { |
| ahci_restart_port(ap, readl(port_mmio + PORT_IRQ_STAT)); |
| |
| /* hack alert! We cannot use the supplied completion |
| * function from inside the ->eh_strategy_handler() thread. |
| * libata is the only user of ->eh_strategy_handler() in |
| * any kernel, so the default scsi_done() assumes it is |
| * not being called from the SCSI EH. |
| */ |
| qc->scsidone = scsi_finish_command; |
| qc->err_mask |= AC_ERR_OTHER; |
| ata_qc_complete(qc); |
| } |
| |
| spin_unlock_irqrestore(&host_set->lock, flags); |
| } |
| |
| static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc) |
| { |
| void __iomem *mmio = ap->host_set->mmio_base; |
| void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); |
| u32 status, serr, ci; |
| |
| serr = readl(port_mmio + PORT_SCR_ERR); |
| writel(serr, port_mmio + PORT_SCR_ERR); |
| |
| status = readl(port_mmio + PORT_IRQ_STAT); |
| writel(status, port_mmio + PORT_IRQ_STAT); |
| |
| ci = readl(port_mmio + PORT_CMD_ISSUE); |
| if (likely((ci & 0x1) == 0)) { |
| if (qc) { |
| assert(qc->err_mask == 0); |
| ata_qc_complete(qc); |
| qc = NULL; |
| } |
| } |
| |
| if (status & PORT_IRQ_FATAL) { |
| unsigned int err_mask; |
| if (status & PORT_IRQ_TF_ERR) |
| err_mask = AC_ERR_DEV; |
| else if (status & PORT_IRQ_IF_ERR) |
| err_mask = AC_ERR_ATA_BUS; |
| else |
| err_mask = AC_ERR_HOST_BUS; |
| |
| /* command processing has stopped due to error; restart */ |
| ahci_restart_port(ap, status); |
| |
| if (qc) { |
| qc->err_mask |= AC_ERR_OTHER; |
| ata_qc_complete(qc); |
| } |
| } |
| |
| return 1; |
| } |
| |
| static void ahci_irq_clear(struct ata_port *ap) |
| { |
| /* TODO */ |
| } |
| |
| static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs) |
| { |
| struct ata_host_set *host_set = dev_instance; |
| struct ahci_host_priv *hpriv; |
| unsigned int i, handled = 0; |
| void __iomem *mmio; |
| u32 irq_stat, irq_ack = 0; |
| |
| VPRINTK("ENTER\n"); |
| |
| hpriv = host_set->private_data; |
| mmio = host_set->mmio_base; |
| |
| /* sigh. 0xffffffff is a valid return from h/w */ |
| irq_stat = readl(mmio + HOST_IRQ_STAT); |
| irq_stat &= hpriv->port_map; |
| if (!irq_stat) |
| return IRQ_NONE; |
| |
| spin_lock(&host_set->lock); |
| |
| for (i = 0; i < host_set->n_ports; i++) { |
| struct ata_port *ap; |
| |
| if (!(irq_stat & (1 << i))) |
| continue; |
| |
| ap = host_set->ports[i]; |
| if (ap) { |
| struct ata_queued_cmd *qc; |
| qc = ata_qc_from_tag(ap, ap->active_tag); |
| if (!ahci_host_intr(ap, qc)) |
| if (ata_ratelimit()) { |
| struct pci_dev *pdev = |
| to_pci_dev(ap->host_set->dev); |
| dev_printk(KERN_WARNING, &pdev->dev, |
| "unhandled interrupt on port %u\n", |
| i); |
| } |
| |
| VPRINTK("port %u\n", i); |
| } else { |
| VPRINTK("port %u (no irq)\n", i); |
| if (ata_ratelimit()) { |
| struct pci_dev *pdev = |
| to_pci_dev(ap->host_set->dev); |
| dev_printk(KERN_WARNING, &pdev->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_set->lock); |
| |
| VPRINTK("EXIT\n"); |
| |
| return IRQ_RETVAL(handled); |
| } |
| |
| static int ahci_qc_issue(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; |
| |
| writel(1, port_mmio + PORT_CMD_ISSUE); |
| readl(port_mmio + PORT_CMD_ISSUE); /* flush */ |
| |
| return 0; |
| } |
| |
| static void ahci_setup_port(struct ata_ioports *port, unsigned long base, |
| unsigned int port_idx) |
| { |
| VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx); |
| base = ahci_port_base_ul(base, port_idx); |
| VPRINTK("base now==0x%lx\n", base); |
| |
| port->cmd_addr = base; |
| port->scr_addr = base + PORT_SCR; |
| |
| VPRINTK("EXIT\n"); |
| } |
| |
| static int ahci_host_init(struct ata_probe_ent *probe_ent) |
| { |
| struct ahci_host_priv *hpriv = probe_ent->private_data; |
| struct pci_dev *pdev = to_pci_dev(probe_ent->dev); |
| void __iomem *mmio = probe_ent->mmio_base; |
| u32 tmp, cap_save; |
| unsigned int i, j, using_dac; |
| int rc; |
| void __iomem *port_mmio; |
| |
| cap_save = readl(mmio + HOST_CAP); |
| cap_save &= ( (1<<28) | (1<<17) ); |
| cap_save |= (1 << 27); |
| |
| /* global controller reset */ |
| tmp = readl(mmio + HOST_CTL); |
| if ((tmp & HOST_RESET) == 0) { |
| writel(tmp | HOST_RESET, mmio + HOST_CTL); |
| readl(mmio + HOST_CTL); /* flush */ |
| } |
| |
| /* reset must complete within 1 second, or |
| * the hardware should be considered fried. |
| */ |
| ssleep(1); |
| |
| tmp = readl(mmio + HOST_CTL); |
| if (tmp & HOST_RESET) { |
| dev_printk(KERN_ERR, &pdev->dev, |
| "controller reset failed (0x%x)\n", tmp); |
| return -EIO; |
| } |
| |
| writel(HOST_AHCI_EN, mmio + HOST_CTL); |
| (void) readl(mmio + HOST_CTL); /* flush */ |
| writel(cap_save, mmio + HOST_CAP); |
| writel(0xf, mmio + HOST_PORTS_IMPL); |
| (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ |
| |
| if (pdev->vendor == PCI_VENDOR_ID_INTEL) { |
| u16 tmp16; |
| |
| pci_read_config_word(pdev, 0x92, &tmp16); |
| tmp16 |= 0xf; |
| pci_write_config_word(pdev, 0x92, tmp16); |
| } |
| |
| hpriv->cap = readl(mmio + HOST_CAP); |
| hpriv->port_map = readl(mmio + HOST_PORTS_IMPL); |
| probe_ent->n_ports = (hpriv->cap & 0x1f) + 1; |
| |
| VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n", |
| hpriv->cap, hpriv->port_map, probe_ent->n_ports); |
| |
| using_dac = hpriv->cap & HOST_CAP_64; |
| if (using_dac && |
| !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) { |
| rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); |
| if (rc) { |
| rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); |
| if (rc) { |
| 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++) { |
| #if 0 /* BIOSen initialize this incorrectly */ |
| if (!(hpriv->port_map & (1 << i))) |
| continue; |
| #endif |
| |
| port_mmio = ahci_port_base(mmio, i); |
| VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio); |
| |
| ahci_setup_port(&probe_ent->port[i], |
| (unsigned long) mmio, i); |
| |
| /* make sure port is not active */ |
| tmp = readl(port_mmio + PORT_CMD); |
| VPRINTK("PORT_CMD 0x%x\n", tmp); |
| if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | |
| PORT_CMD_FIS_RX | PORT_CMD_START)) { |
| tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | |
| PORT_CMD_FIS_RX | PORT_CMD_START); |
| writel(tmp, port_mmio + PORT_CMD); |
| readl(port_mmio + PORT_CMD); /* flush */ |
| |
| /* spec says 500 msecs for each bit, so |
| * this is slightly incorrect. |
| */ |
| msleep(500); |
| } |
| |
| writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD); |
| |
| j = 0; |
| while (j < 100) { |
| msleep(10); |
| tmp = readl(port_mmio + PORT_SCR_STAT); |
| if ((tmp & 0xf) == 0x3) |
| break; |
| j++; |
| } |
| |
| tmp = readl(port_mmio + PORT_SCR_ERR); |
| VPRINTK("PORT_SCR_ERR 0x%x\n", tmp); |
| writel(tmp, port_mmio + PORT_SCR_ERR); |
| |
| /* ack any pending irq events for this port */ |
| tmp = readl(port_mmio + PORT_IRQ_STAT); |
| VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp); |
| if (tmp) |
| writel(tmp, port_mmio + PORT_IRQ_STAT); |
| |
| writel(1 << i, mmio + HOST_IRQ_STAT); |
| |
| /* set irq mask (enables interrupts) */ |
| writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK); |
| } |
| |
| tmp = readl(mmio + HOST_CTL); |
| VPRINTK("HOST_CTL 0x%x\n", tmp); |
| writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); |
| tmp = readl(mmio + HOST_CTL); |
| VPRINTK("HOST_CTL 0x%x\n", tmp); |
| |
| pci_set_master(pdev); |
| |
| return 0; |
| } |
| |
| 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->mmio_base; |
| u32 vers, cap, impl, speed; |
| const char *speed_s; |
| u16 cc; |
| const char *scc_s; |
| |
| vers = readl(mmio + HOST_VERSION); |
| cap = hpriv->cap; |
| impl = hpriv->port_map; |
| |
| speed = (cap >> 20) & 0xf; |
| if (speed == 1) |
| speed_s = "1.5"; |
| else if (speed == 2) |
| speed_s = "3"; |
| else |
| speed_s = "?"; |
| |
| pci_read_config_word(pdev, 0x0a, &cc); |
| if (cc == 0x0101) |
| scc_s = "IDE"; |
| else if (cc == 0x0106) |
| scc_s = "SATA"; |
| else if (cc == 0x0104) |
| scc_s = "RAID"; |
| else |
| scc_s = "unknown"; |
| |
| 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; |
| struct ata_probe_ent *probe_ent = NULL; |
| struct ahci_host_priv *hpriv; |
| unsigned long base; |
| void __iomem *mmio_base; |
| unsigned int board_idx = (unsigned int) ent->driver_data; |
| int have_msi, pci_dev_busy = 0; |
| int rc; |
| |
| VPRINTK("ENTER\n"); |
| |
| if (!printed_version++) |
| 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) { |
| pci_dev_busy = 1; |
| goto err_out; |
| } |
| |
| if (pci_enable_msi(pdev) == 0) |
| have_msi = 1; |
| else { |
| pci_intx(pdev, 1); |
| have_msi = 0; |
| } |
| |
| probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); |
| if (probe_ent == NULL) { |
| rc = -ENOMEM; |
| goto err_out_msi; |
| } |
| |
| memset(probe_ent, 0, sizeof(*probe_ent)); |
| probe_ent->dev = pci_dev_to_dev(pdev); |
| INIT_LIST_HEAD(&probe_ent->node); |
| |
| mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0); |
| if (mmio_base == NULL) { |
| rc = -ENOMEM; |
| goto err_out_free_ent; |
| } |
| base = (unsigned long) mmio_base; |
| |
| hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL); |
| if (!hpriv) { |
| rc = -ENOMEM; |
| goto err_out_iounmap; |
| } |
| memset(hpriv, 0, sizeof(*hpriv)); |
| |
| probe_ent->sht = ahci_port_info[board_idx].sht; |
| probe_ent->host_flags = ahci_port_info[board_idx].host_flags; |
| probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask; |
| probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask; |
| probe_ent->port_ops = ahci_port_info[board_idx].port_ops; |
| |
| probe_ent->irq = pdev->irq; |
| probe_ent->irq_flags = SA_SHIRQ; |
| probe_ent->mmio_base = mmio_base; |
| probe_ent->private_data = hpriv; |
| |
| if (have_msi) |
| hpriv->flags |= AHCI_FLAG_MSI; |
| |
| /* JMicron-specific fixup: make sure we're in AHCI mode */ |
| if (pdev->vendor == 0x197b) |
| pci_write_config_byte(pdev, 0x41, 0xa1); |
| |
| /* initialize adapter */ |
| rc = ahci_host_init(probe_ent); |
| if (rc) |
| goto err_out_hpriv; |
| |
| ahci_print_info(probe_ent); |
| |
| /* FIXME: check ata_device_add return value */ |
| ata_device_add(probe_ent); |
| kfree(probe_ent); |
| |
| return 0; |
| |
| err_out_hpriv: |
| kfree(hpriv); |
| err_out_iounmap: |
| pci_iounmap(pdev, mmio_base); |
| err_out_free_ent: |
| kfree(probe_ent); |
| err_out_msi: |
| if (have_msi) |
| pci_disable_msi(pdev); |
| else |
| pci_intx(pdev, 0); |
| pci_release_regions(pdev); |
| err_out: |
| if (!pci_dev_busy) |
| pci_disable_device(pdev); |
| return rc; |
| } |
| |
| static void ahci_remove_one (struct pci_dev *pdev) |
| { |
| struct device *dev = pci_dev_to_dev(pdev); |
| struct ata_host_set *host_set = dev_get_drvdata(dev); |
| struct ahci_host_priv *hpriv = host_set->private_data; |
| struct ata_port *ap; |
| unsigned int i; |
| int have_msi; |
| |
| for (i = 0; i < host_set->n_ports; i++) { |
| ap = host_set->ports[i]; |
| |
| scsi_remove_host(ap->host); |
| } |
| |
| have_msi = hpriv->flags & AHCI_FLAG_MSI; |
| free_irq(host_set->irq, host_set); |
| |
| for (i = 0; i < host_set->n_ports; i++) { |
| ap = host_set->ports[i]; |
| |
| ata_scsi_release(ap->host); |
| scsi_host_put(ap->host); |
| } |
| |
| kfree(hpriv); |
| pci_iounmap(pdev, host_set->mmio_base); |
| kfree(host_set); |
| |
| if (have_msi) |
| pci_disable_msi(pdev); |
| else |
| pci_intx(pdev, 0); |
| pci_release_regions(pdev); |
| pci_disable_device(pdev); |
| dev_set_drvdata(dev, NULL); |
| } |
| |
| static int __init ahci_init(void) |
| { |
| return pci_module_init(&ahci_pci_driver); |
| } |
| |
| static void __exit ahci_exit(void) |
| { |
| pci_unregister_driver(&ahci_pci_driver); |
| } |
| |
| |
| MODULE_AUTHOR("Jeff Garzik"); |
| MODULE_DESCRIPTION("AHCI SATA low-level driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DEVICE_TABLE(pci, ahci_pci_tbl); |
| MODULE_VERSION(DRV_VERSION); |
| |
| module_init(ahci_init); |
| module_exit(ahci_exit); |