/* * sata_mv.c - Marvell SATA support * * Copyright 2005: EMC Corporation, all rights reserved. * * Please ALWAYS copy linux-ide@vger.kernel.org on emails. * * 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; version 2 of the License. * * 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; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include #include #include #include "scsi.h" #include #include #include #define DRV_NAME "sata_mv" #define DRV_VERSION "0.25" enum { /* BAR's are enumerated in terms of pci_resource_start() terms */ MV_PRIMARY_BAR = 0, /* offset 0x10: memory space */ MV_IO_BAR = 2, /* offset 0x18: IO space */ MV_MISC_BAR = 3, /* offset 0x1c: FLASH, NVRAM, SRAM */ MV_MAJOR_REG_AREA_SZ = 0x10000, /* 64KB */ MV_MINOR_REG_AREA_SZ = 0x2000, /* 8KB */ MV_PCI_REG_BASE = 0, MV_IRQ_COAL_REG_BASE = 0x18000, /* 6xxx part only */ MV_SATAHC0_REG_BASE = 0x20000, MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ, MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ, MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */ MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ, MV_USE_Q_DEPTH = ATA_DEF_QUEUE, MV_MAX_Q_DEPTH = 32, MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1, /* CRQB needs alignment on a 1KB boundary. Size == 1KB * CRPB needs alignment on a 256B boundary. Size == 256B * SG count of 176 leads to MV_PORT_PRIV_DMA_SZ == 4KB * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B */ MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH), MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH), MV_MAX_SG_CT = 176, MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT), MV_PORT_PRIV_DMA_SZ = (MV_CRQB_Q_SZ + MV_CRPB_Q_SZ + MV_SG_TBL_SZ), /* Our DMA boundary is determined by an ePRD being unable to handle * anything larger than 64KB */ MV_DMA_BOUNDARY = 0xffffU, MV_PORTS_PER_HC = 4, /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */ MV_PORT_HC_SHIFT = 2, /* == (port % MV_PORTS_PER_HC) to determine hard port from 0-7 port */ MV_PORT_MASK = 3, /* Host Flags */ MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */ MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */ MV_FLAG_GLBL_SFT_RST = (1 << 28), /* Global Soft Reset support */ MV_COMMON_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO), MV_6XXX_FLAGS = (MV_FLAG_IRQ_COALESCE | MV_FLAG_GLBL_SFT_RST), chip_504x = 0, chip_508x = 1, chip_604x = 2, chip_608x = 3, CRQB_FLAG_READ = (1 << 0), CRQB_TAG_SHIFT = 1, CRQB_CMD_ADDR_SHIFT = 8, CRQB_CMD_CS = (0x2 << 11), CRQB_CMD_LAST = (1 << 15), CRPB_FLAG_STATUS_SHIFT = 8, EPRD_FLAG_END_OF_TBL = (1 << 31), /* PCI interface registers */ PCI_COMMAND_OFS = 0xc00, PCI_MAIN_CMD_STS_OFS = 0xd30, STOP_PCI_MASTER = (1 << 2), PCI_MASTER_EMPTY = (1 << 3), GLOB_SFT_RST = (1 << 4), PCI_IRQ_CAUSE_OFS = 0x1d58, PCI_IRQ_MASK_OFS = 0x1d5c, PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */ HC_MAIN_IRQ_CAUSE_OFS = 0x1d60, HC_MAIN_IRQ_MASK_OFS = 0x1d64, PORT0_ERR = (1 << 0), /* shift by port # */ PORT0_DONE = (1 << 1), /* shift by port # */ HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */ HC_SHIFT = 9, /* bits 9-17 = HC1's ports */ PCI_ERR = (1 << 18), TRAN_LO_DONE = (1 << 19), /* 6xxx: IRQ coalescing */ TRAN_HI_DONE = (1 << 20), /* 6xxx: IRQ coalescing */ PORTS_0_7_COAL_DONE = (1 << 21), /* 6xxx: IRQ coalescing */ GPIO_INT = (1 << 22), SELF_INT = (1 << 23), TWSI_INT = (1 << 24), HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */ HC_MAIN_MASKED_IRQS = (TRAN_LO_DONE | TRAN_HI_DONE | PORTS_0_7_COAL_DONE | GPIO_INT | TWSI_INT | HC_MAIN_RSVD), /* SATAHC registers */ HC_CFG_OFS = 0, HC_IRQ_CAUSE_OFS = 0x14, CRPB_DMA_DONE = (1 << 0), /* shift by port # */ HC_IRQ_COAL = (1 << 4), /* IRQ coalescing */ DEV_IRQ = (1 << 8), /* shift by port # */ /* Shadow block registers */ SHD_BLK_OFS = 0x100, SHD_CTL_AST_OFS = 0x20, /* ofs from SHD_BLK_OFS */ /* SATA registers */ SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */ SATA_ACTIVE_OFS = 0x350, /* Port registers */ EDMA_CFG_OFS = 0, EDMA_CFG_Q_DEPTH = 0, /* queueing disabled */ EDMA_CFG_NCQ = (1 << 5), EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */ EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */ EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */ EDMA_ERR_IRQ_CAUSE_OFS = 0x8, EDMA_ERR_IRQ_MASK_OFS = 0xc, EDMA_ERR_D_PAR = (1 << 0), EDMA_ERR_PRD_PAR = (1 << 1), EDMA_ERR_DEV = (1 << 2), EDMA_ERR_DEV_DCON = (1 << 3), EDMA_ERR_DEV_CON = (1 << 4), EDMA_ERR_SERR = (1 << 5), EDMA_ERR_SELF_DIS = (1 << 7), EDMA_ERR_BIST_ASYNC = (1 << 8), EDMA_ERR_CRBQ_PAR = (1 << 9), EDMA_ERR_CRPB_PAR = (1 << 10), EDMA_ERR_INTRL_PAR = (1 << 11), EDMA_ERR_IORDY = (1 << 12), EDMA_ERR_LNK_CTRL_RX = (0xf << 13), EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15), EDMA_ERR_LNK_DATA_RX = (0xf << 17), EDMA_ERR_LNK_CTRL_TX = (0x1f << 21), EDMA_ERR_LNK_DATA_TX = (0x1f << 26), EDMA_ERR_TRANS_PROTO = (1 << 31), EDMA_ERR_FATAL = (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR | EDMA_ERR_DEV_DCON | EDMA_ERR_CRBQ_PAR | EDMA_ERR_CRPB_PAR | EDMA_ERR_INTRL_PAR | EDMA_ERR_IORDY | EDMA_ERR_LNK_CTRL_RX_2 | EDMA_ERR_LNK_DATA_RX | EDMA_ERR_LNK_DATA_TX | EDMA_ERR_TRANS_PROTO), EDMA_REQ_Q_BASE_HI_OFS = 0x10, EDMA_REQ_Q_IN_PTR_OFS = 0x14, /* also contains BASE_LO */ EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U, EDMA_REQ_Q_OUT_PTR_OFS = 0x18, EDMA_REQ_Q_PTR_SHIFT = 5, EDMA_RSP_Q_BASE_HI_OFS = 0x1c, EDMA_RSP_Q_IN_PTR_OFS = 0x20, EDMA_RSP_Q_OUT_PTR_OFS = 0x24, /* also contains BASE_LO */ EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U, EDMA_RSP_Q_PTR_SHIFT = 3, EDMA_CMD_OFS = 0x28, EDMA_EN = (1 << 0), EDMA_DS = (1 << 1), ATA_RST = (1 << 2), /* Host private flags (hp_flags) */ MV_HP_FLAG_MSI = (1 << 0), /* Port private flags (pp_flags) */ MV_PP_FLAG_EDMA_EN = (1 << 0), MV_PP_FLAG_EDMA_DS_ACT = (1 << 1), }; /* Command ReQuest Block: 32B */ struct mv_crqb { u32 sg_addr; u32 sg_addr_hi; u16 ctrl_flags; u16 ata_cmd[11]; }; /* Command ResPonse Block: 8B */ struct mv_crpb { u16 id; u16 flags; u32 tmstmp; }; /* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */ struct mv_sg { u32 addr; u32 flags_size; u32 addr_hi; u32 reserved; }; struct mv_port_priv { struct mv_crqb *crqb; dma_addr_t crqb_dma; struct mv_crpb *crpb; dma_addr_t crpb_dma; struct mv_sg *sg_tbl; dma_addr_t sg_tbl_dma; unsigned req_producer; /* cp of req_in_ptr */ unsigned rsp_consumer; /* cp of rsp_out_ptr */ u32 pp_flags; }; struct mv_host_priv { u32 hp_flags; }; static void mv_irq_clear(struct ata_port *ap); static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in); static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val); static u8 mv_check_err(struct ata_port *ap); static void mv_phy_reset(struct ata_port *ap); static void mv_host_stop(struct ata_host_set *host_set); static int mv_port_start(struct ata_port *ap); static void mv_port_stop(struct ata_port *ap); static void mv_qc_prep(struct ata_queued_cmd *qc); static int mv_qc_issue(struct ata_queued_cmd *qc); static irqreturn_t mv_interrupt(int irq, void *dev_instance, struct pt_regs *regs); static void mv_eng_timeout(struct ata_port *ap); static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static Scsi_Host_Template mv_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .eh_strategy_handler = ata_scsi_error, .can_queue = MV_USE_Q_DEPTH, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = MV_MAX_SG_CT, .max_sectors = ATA_MAX_SECTORS, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = MV_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .bios_param = ata_std_bios_param, .ordered_flush = 1, }; static const struct ata_port_operations mv_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .check_err = mv_check_err, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .phy_reset = mv_phy_reset, .qc_prep = mv_qc_prep, .qc_issue = mv_qc_issue, .eng_timeout = mv_eng_timeout, .irq_handler = mv_interrupt, .irq_clear = mv_irq_clear, .scr_read = mv_scr_read, .scr_write = mv_scr_write, .port_start = mv_port_start, .port_stop = mv_port_stop, .host_stop = mv_host_stop, }; static struct ata_port_info mv_port_info[] = { { /* chip_504x */ .sht = &mv_sht, .host_flags = MV_COMMON_FLAGS, .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */ .port_ops = &mv_ops, }, { /* chip_508x */ .sht = &mv_sht, .host_flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC), .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */ .port_ops = &mv_ops, }, { /* chip_604x */ .sht = &mv_sht, .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS), .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &mv_ops, }, { /* chip_608x */ .sht = &mv_sht, .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS | MV_FLAG_DUAL_HC), .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &mv_ops, }, }; static struct pci_device_id mv_pci_tbl[] = { {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5040), 0, 0, chip_504x}, {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5041), 0, 0, chip_504x}, {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5080), 0, 0, chip_508x}, {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5081), 0, 0, chip_508x}, {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6040), 0, 0, chip_604x}, {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6041), 0, 0, chip_604x}, {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6080), 0, 0, chip_608x}, {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6081), 0, 0, chip_608x}, {} /* terminate list */ }; static struct pci_driver mv_pci_driver = { .name = DRV_NAME, .id_table = mv_pci_tbl, .probe = mv_init_one, .remove = ata_pci_remove_one, }; /* * Functions */ static inline void writelfl(unsigned long data, void __iomem *addr) { writel(data, addr); (void) readl(addr); /* flush to avoid PCI posted write */ } static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc) { return (base + MV_SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ)); } static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port) { return (mv_hc_base(base, port >> MV_PORT_HC_SHIFT) + MV_SATAHC_ARBTR_REG_SZ + ((port & MV_PORT_MASK) * MV_PORT_REG_SZ)); } static inline void __iomem *mv_ap_base(struct ata_port *ap) { return mv_port_base(ap->host_set->mmio_base, ap->port_no); } static inline int mv_get_hc_count(unsigned long hp_flags) { return ((hp_flags & MV_FLAG_DUAL_HC) ? 2 : 1); } static void mv_irq_clear(struct ata_port *ap) { } /** * mv_start_dma - Enable eDMA engine * @base: port base address * @pp: port private data * * Verify the local cache of the eDMA state is accurate with an * assert. * * LOCKING: * Inherited from caller. */ static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp) { if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) { writelfl(EDMA_EN, base + EDMA_CMD_OFS); pp->pp_flags |= MV_PP_FLAG_EDMA_EN; } assert(EDMA_EN & readl(base + EDMA_CMD_OFS)); } /** * mv_stop_dma - Disable eDMA engine * @ap: ATA channel to manipulate * * Verify the local cache of the eDMA state is accurate with an * assert. * * LOCKING: * Inherited from caller. */ static void mv_stop_dma(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); struct mv_port_priv *pp = ap->private_data; u32 reg; int i; if (MV_PP_FLAG_EDMA_EN & pp->pp_flags) { /* Disable EDMA if active. The disable bit auto clears. */ writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS); pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; } else { assert(!(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS))); } /* now properly wait for the eDMA to stop */ for (i = 1000; i > 0; i--) { reg = readl(port_mmio + EDMA_CMD_OFS); if (!(EDMA_EN & reg)) { break; } udelay(100); } if (EDMA_EN & reg) { printk(KERN_ERR "ata%u: Unable to stop eDMA\n", ap->id); /* FIXME: Consider doing a reset here to recover */ } } #ifdef ATA_DEBUG static void mv_dump_mem(void __iomem *start, unsigned bytes) { int b, w; for (b = 0; b < bytes; ) { DPRINTK("%p: ", start + b); for (w = 0; b < bytes && w < 4; w++) { printk("%08x ",readl(start + b)); b += sizeof(u32); } printk("\n"); } } #endif static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes) { #ifdef ATA_DEBUG int b, w; u32 dw; for (b = 0; b < bytes; ) { DPRINTK("%02x: ", b); for (w = 0; b < bytes && w < 4; w++) { (void) pci_read_config_dword(pdev,b,&dw); printk("%08x ",dw); b += sizeof(u32); } printk("\n"); } #endif } static void mv_dump_all_regs(void __iomem *mmio_base, int port, struct pci_dev *pdev) { #ifdef ATA_DEBUG void __iomem *hc_base = mv_hc_base(mmio_base, port >> MV_PORT_HC_SHIFT); void __iomem *port_base; int start_port, num_ports, p, start_hc, num_hcs, hc; if (0 > port) { start_hc = start_port = 0; num_ports = 8; /* shld be benign for 4 port devs */ num_hcs = 2; } else { start_hc = port >> MV_PORT_HC_SHIFT; start_port = port; num_ports = num_hcs = 1; } DPRINTK("All registers for port(s) %u-%u:\n", start_port, num_ports > 1 ? num_ports - 1 : start_port); if (NULL != pdev) { DPRINTK("PCI config space regs:\n"); mv_dump_pci_cfg(pdev, 0x68); } DPRINTK("PCI regs:\n"); mv_dump_mem(mmio_base+0xc00, 0x3c); mv_dump_mem(mmio_base+0xd00, 0x34); mv_dump_mem(mmio_base+0xf00, 0x4); mv_dump_mem(mmio_base+0x1d00, 0x6c); for (hc = start_hc; hc < start_hc + num_hcs; hc++) { hc_base = mv_hc_base(mmio_base, port >> MV_PORT_HC_SHIFT); DPRINTK("HC regs (HC %i):\n", hc); mv_dump_mem(hc_base, 0x1c); } for (p = start_port; p < start_port + num_ports; p++) { port_base = mv_port_base(mmio_base, p); DPRINTK("EDMA regs (port %i):\n",p); mv_dump_mem(port_base, 0x54); DPRINTK("SATA regs (port %i):\n",p); mv_dump_mem(port_base+0x300, 0x60); } #endif } static unsigned int mv_scr_offset(unsigned int sc_reg_in) { unsigned int ofs; switch (sc_reg_in) { case SCR_STATUS: case SCR_CONTROL: case SCR_ERROR: ofs = SATA_STATUS_OFS + (sc_reg_in * sizeof(u32)); break; case SCR_ACTIVE: ofs = SATA_ACTIVE_OFS; /* active is not with the others */ break; default: ofs = 0xffffffffU; break; } return ofs; } static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in) { unsigned int ofs = mv_scr_offset(sc_reg_in); if (0xffffffffU != ofs) { return readl(mv_ap_base(ap) + ofs); } else { return (u32) ofs; } } static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val) { unsigned int ofs = mv_scr_offset(sc_reg_in); if (0xffffffffU != ofs) { writelfl(val, mv_ap_base(ap) + ofs); } } /** * mv_global_soft_reset - Perform the 6xxx global soft reset * @mmio_base: base address of the HBA * * This routine only applies to 6xxx parts. * * LOCKING: * Inherited from caller. */ static int mv_global_soft_reset(void __iomem *mmio_base) { void __iomem *reg = mmio_base + PCI_MAIN_CMD_STS_OFS; int i, rc = 0; u32 t; /* Following procedure defined in PCI "main command and status * register" table. */ t = readl(reg); writel(t | STOP_PCI_MASTER, reg); for (i = 0; i < 1000; i++) { udelay(1); t = readl(reg); if (PCI_MASTER_EMPTY & t) { break; } } if (!(PCI_MASTER_EMPTY & t)) { printk(KERN_ERR DRV_NAME ": PCI master won't flush\n"); rc = 1; goto done; } /* set reset */ i = 5; do { writel(t | GLOB_SFT_RST, reg); t = readl(reg); udelay(1); } while (!(GLOB_SFT_RST & t) && (i-- > 0)); if (!(GLOB_SFT_RST & t)) { printk(KERN_ERR DRV_NAME ": can't set global reset\n"); rc = 1; goto done; } /* clear reset and *reenable the PCI master* (not mentioned in spec) */ i = 5; do { writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg); t = readl(reg); udelay(1); } while ((GLOB_SFT_RST & t) && (i-- > 0)); if (GLOB_SFT_RST & t) { printk(KERN_ERR DRV_NAME ": can't clear global reset\n"); rc = 1; } done: return rc; } /** * mv_host_stop - Host specific cleanup/stop routine. * @host_set: host data structure * * Disable ints, cleanup host memory, call general purpose * host_stop. * * LOCKING: * Inherited from caller. */ static void mv_host_stop(struct ata_host_set *host_set) { struct mv_host_priv *hpriv = host_set->private_data; struct pci_dev *pdev = to_pci_dev(host_set->dev); if (hpriv->hp_flags & MV_HP_FLAG_MSI) { pci_disable_msi(pdev); } else { pci_intx(pdev, 0); } kfree(hpriv); ata_host_stop(host_set); } /** * mv_port_start - Port specific init/start routine. * @ap: ATA channel to manipulate * * Allocate and point to DMA memory, init port private memory, * zero indices. * * LOCKING: * Inherited from caller. */ static int mv_port_start(struct ata_port *ap) { struct device *dev = ap->host_set->dev; struct mv_port_priv *pp; void __iomem *port_mmio = mv_ap_base(ap); void *mem; dma_addr_t mem_dma; pp = kmalloc(sizeof(*pp), GFP_KERNEL); if (!pp) { return -ENOMEM; } memset(pp, 0, sizeof(*pp)); mem = dma_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL); if (!mem) { kfree(pp); return -ENOMEM; } memset(mem, 0, MV_PORT_PRIV_DMA_SZ); /* First item in chunk of DMA memory: * 32-slot command request table (CRQB), 32 bytes each in size */ pp->crqb = mem; pp->crqb_dma = mem_dma; mem += MV_CRQB_Q_SZ; mem_dma += MV_CRQB_Q_SZ; /* Second item: * 32-slot command response table (CRPB), 8 bytes each in size */ pp->crpb = mem; pp->crpb_dma = mem_dma; mem += MV_CRPB_Q_SZ; mem_dma += MV_CRPB_Q_SZ; /* Third item: * Table of scatter-gather descriptors (ePRD), 16 bytes each */ pp->sg_tbl = mem; pp->sg_tbl_dma = mem_dma; writelfl(EDMA_CFG_Q_DEPTH | EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN, port_mmio + EDMA_CFG_OFS); writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS); writelfl(pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK, port_mmio + EDMA_REQ_Q_IN_PTR_OFS); writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS); writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS); writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS); writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); pp->req_producer = pp->rsp_consumer = 0; /* Don't turn on EDMA here...do it before DMA commands only. Else * we'll be unable to send non-data, PIO, etc due to restricted access * to shadow regs. */ ap->private_data = pp; return 0; } /** * mv_port_stop - Port specific cleanup/stop routine. * @ap: ATA channel to manipulate * * Stop DMA, cleanup port memory. * * LOCKING: * This routine uses the host_set lock to protect the DMA stop. */ static void mv_port_stop(struct ata_port *ap) { struct device *dev = ap->host_set->dev; struct mv_port_priv *pp = ap->private_data; unsigned long flags; spin_lock_irqsave(&ap->host_set->lock, flags); mv_stop_dma(ap); spin_unlock_irqrestore(&ap->host_set->lock, flags); ap->private_data = NULL; dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma); kfree(pp); } /** * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries * @qc: queued command whose SG list to source from * * Populate the SG list and mark the last entry. * * LOCKING: * Inherited from caller. */ static void mv_fill_sg(struct ata_queued_cmd *qc) { struct mv_port_priv *pp = qc->ap->private_data; unsigned int i = 0; struct scatterlist *sg; ata_for_each_sg(sg, qc) { u32 sg_len; dma_addr_t addr; addr = sg_dma_address(sg); sg_len = sg_dma_len(sg); pp->sg_tbl[i].addr = cpu_to_le32(addr & 0xffffffff); pp->sg_tbl[i].addr_hi = cpu_to_le32((addr >> 16) >> 16); assert(0 == (sg_len & ~MV_DMA_BOUNDARY)); pp->sg_tbl[i].flags_size = cpu_to_le32(sg_len); if (ata_sg_is_last(sg, qc)) pp->sg_tbl[i].flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL); i++; } } static inline unsigned mv_inc_q_index(unsigned *index) { *index = (*index + 1) & MV_MAX_Q_DEPTH_MASK; return *index; } static inline void mv_crqb_pack_cmd(u16 *cmdw, u8 data, u8 addr, unsigned last) { *cmdw = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS | (last ? CRQB_CMD_LAST : 0); } /** * mv_qc_prep - Host specific command preparation. * @qc: queued command to prepare * * This routine simply redirects to the general purpose routine * if command is not DMA. Else, it handles prep of the CRQB * (command request block), does some sanity checking, and calls * the SG load routine. * * LOCKING: * Inherited from caller. */ static void mv_qc_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct mv_port_priv *pp = ap->private_data; u16 *cw; struct ata_taskfile *tf; u16 flags = 0; if (ATA_PROT_DMA != qc->tf.protocol) { return; } /* the req producer index should be the same as we remember it */ assert(((readl(mv_ap_base(qc->ap) + EDMA_REQ_Q_IN_PTR_OFS) >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == pp->req_producer); /* Fill in command request block */ if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { flags |= CRQB_FLAG_READ; } assert(MV_MAX_Q_DEPTH > qc->tag); flags |= qc->tag << CRQB_TAG_SHIFT; pp->crqb[pp->req_producer].sg_addr = cpu_to_le32(pp->sg_tbl_dma & 0xffffffff); pp->crqb[pp->req_producer].sg_addr_hi = cpu_to_le32((pp->sg_tbl_dma >> 16) >> 16); pp->crqb[pp->req_producer].ctrl_flags = cpu_to_le16(flags); cw = &pp->crqb[pp->req_producer].ata_cmd[0]; tf = &qc->tf; /* Sadly, the CRQB cannot accomodate all registers--there are * only 11 bytes...so we must pick and choose required * registers based on the command. So, we drop feature and * hob_feature for [RW] DMA commands, but they are needed for * NCQ. NCQ will drop hob_nsect. */ switch (tf->command) { case ATA_CMD_READ: case ATA_CMD_READ_EXT: case ATA_CMD_WRITE: case ATA_CMD_WRITE_EXT: mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0); break; #ifdef LIBATA_NCQ /* FIXME: remove this line when NCQ added */ case ATA_CMD_FPDMA_READ: case ATA_CMD_FPDMA_WRITE: mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0); mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0); break; #endif /* FIXME: remove this line when NCQ added */ default: /* The only other commands EDMA supports in non-queued and * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none * of which are defined/used by Linux. If we get here, this * driver needs work. * * FIXME: modify libata to give qc_prep a return value and * return error here. */ BUG_ON(tf->command); break; } mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0); mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0); mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0); mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0); mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0); mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0); mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0); mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0); mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */ if (!(qc->flags & ATA_QCFLAG_DMAMAP)) { return; } mv_fill_sg(qc); } /** * mv_qc_issue - Initiate a command to the host * @qc: queued command to start * * This routine simply redirects to the general purpose routine * if command is not DMA. Else, it sanity checks our local * caches of the request producer/consumer indices then enables * DMA and bumps the request producer index. * * LOCKING: * Inherited from caller. */ static int mv_qc_issue(struct ata_queued_cmd *qc) { void __iomem *port_mmio = mv_ap_base(qc->ap); struct mv_port_priv *pp = qc->ap->private_data; u32 in_ptr; if (ATA_PROT_DMA != qc->tf.protocol) { /* We're about to send a non-EDMA capable command to the * port. Turn off EDMA so there won't be problems accessing * shadow block, etc registers. */ mv_stop_dma(qc->ap); return ata_qc_issue_prot(qc); } in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS); /* the req producer index should be the same as we remember it */ assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == pp->req_producer); /* until we do queuing, the queue should be empty at this point */ assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK)); mv_inc_q_index(&pp->req_producer); /* now incr producer index */ mv_start_dma(port_mmio, pp); /* and write the request in pointer to kick the EDMA to life */ in_ptr &= EDMA_REQ_Q_BASE_LO_MASK; in_ptr |= pp->req_producer << EDMA_REQ_Q_PTR_SHIFT; writelfl(in_ptr, port_mmio + EDMA_REQ_Q_IN_PTR_OFS); return 0; } /** * mv_get_crpb_status - get status from most recently completed cmd * @ap: ATA channel to manipulate * * This routine is for use when the port is in DMA mode, when it * will be using the CRPB (command response block) method of * returning command completion information. We assert indices * are good, grab status, and bump the response consumer index to * prove that we're up to date. * * LOCKING: * Inherited from caller. */ static u8 mv_get_crpb_status(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); struct mv_port_priv *pp = ap->private_data; u32 out_ptr; out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); /* the response consumer index should be the same as we remember it */ assert(((out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == pp->rsp_consumer); /* increment our consumer index... */ pp->rsp_consumer = mv_inc_q_index(&pp->rsp_consumer); /* and, until we do NCQ, there should only be 1 CRPB waiting */ assert(((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == pp->rsp_consumer); /* write out our inc'd consumer index so EDMA knows we're caught up */ out_ptr &= EDMA_RSP_Q_BASE_LO_MASK; out_ptr |= pp->rsp_consumer << EDMA_RSP_Q_PTR_SHIFT; writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); /* Return ATA status register for completed CRPB */ return (pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT); } /** * mv_err_intr - Handle error interrupts on the port * @ap: ATA channel to manipulate * * In most cases, just clear the interrupt and move on. However, * some cases require an eDMA reset, which is done right before * the COMRESET in mv_phy_reset(). The SERR case requires a * clear of pending errors in the SATA SERROR register. Finally, * if the port disabled DMA, update our cached copy to match. * * LOCKING: * Inherited from caller. */ static void mv_err_intr(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); u32 edma_err_cause, serr = 0; edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); if (EDMA_ERR_SERR & edma_err_cause) { serr = scr_read(ap, SCR_ERROR); scr_write_flush(ap, SCR_ERROR, serr); } if (EDMA_ERR_SELF_DIS & edma_err_cause) { struct mv_port_priv *pp = ap->private_data; pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; } DPRINTK(KERN_ERR "ata%u: port error; EDMA err cause: 0x%08x " "SERR: 0x%08x\n", ap->id, edma_err_cause, serr); /* Clear EDMA now that SERR cleanup done */ writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); /* check for fatal here and recover if needed */ if (EDMA_ERR_FATAL & edma_err_cause) { mv_phy_reset(ap); } } /** * mv_host_intr - Handle all interrupts on the given host controller * @host_set: host specific structure * @relevant: port error bits relevant to this host controller * @hc: which host controller we're to look at * * Read then write clear the HC interrupt status then walk each * port connected to the HC and see if it needs servicing. Port * success ints are reported in the HC interrupt status reg, the * port error ints are reported in the higher level main * interrupt status register and thus are passed in via the * 'relevant' argument. * * LOCKING: * Inherited from caller. */ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, unsigned int hc) { void __iomem *mmio = host_set->mmio_base; void __iomem *hc_mmio = mv_hc_base(mmio, hc); struct ata_port *ap; struct ata_queued_cmd *qc; u32 hc_irq_cause; int shift, port, port0, hard_port, handled; u8 ata_status = 0; if (hc == 0) { port0 = 0; } else { port0 = MV_PORTS_PER_HC; } /* we'll need the HC success int register in most cases */ hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS); if (hc_irq_cause) { writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS); } VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n", hc,relevant,hc_irq_cause); for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) { ap = host_set->ports[port]; hard_port = port & MV_PORT_MASK; /* range 0-3 */ handled = 0; /* ensure ata_status is set if handled++ */ if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) { /* new CRPB on the queue; just one at a time until NCQ */ ata_status = mv_get_crpb_status(ap); handled++; } else if ((DEV_IRQ << hard_port) & hc_irq_cause) { /* received ATA IRQ; read the status reg to clear INTRQ */ ata_status = readb((void __iomem *) ap->ioaddr.status_addr); handled++; } shift = port << 1; /* (port * 2) */ if (port >= MV_PORTS_PER_HC) { shift++; /* skip bit 8 in the HC Main IRQ reg */ } if ((PORT0_ERR << shift) & relevant) { mv_err_intr(ap); /* OR in ATA_ERR to ensure libata knows we took one */ ata_status = readb((void __iomem *) ap->ioaddr.status_addr) | ATA_ERR; handled++; } if (handled && ap) { qc = ata_qc_from_tag(ap, ap->active_tag); if (NULL != qc) { VPRINTK("port %u IRQ found for qc, " "ata_status 0x%x\n", port,ata_status); /* mark qc status appropriately */ ata_qc_complete(qc, ata_status); } } } VPRINTK("EXIT\n"); } /** * mv_interrupt - * @irq: unused * @dev_instance: private data; in this case the host structure * @regs: unused * * Read the read only register to determine if any host * controllers have pending interrupts. If so, call lower level * routine to handle. Also check for PCI errors which are only * reported here. * * LOCKING: * This routine holds the host_set lock while processing pending * interrupts. */ static irqreturn_t mv_interrupt(int irq, void *dev_instance, struct pt_regs *regs) { struct ata_host_set *host_set = dev_instance; unsigned int hc, handled = 0, n_hcs; void __iomem *mmio = host_set->mmio_base; u32 irq_stat; irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS); /* check the cases where we either have nothing pending or have read * a bogus register value which can indicate HW removal or PCI fault */ if (!irq_stat || (0xffffffffU == irq_stat)) { return IRQ_NONE; } n_hcs = mv_get_hc_count(host_set->ports[0]->flags); spin_lock(&host_set->lock); for (hc = 0; hc < n_hcs; hc++) { u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT)); if (relevant) { mv_host_intr(host_set, relevant, hc); handled++; } } if (PCI_ERR & irq_stat) { printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n", readl(mmio + PCI_IRQ_CAUSE_OFS)); DPRINTK("All regs @ PCI error\n"); mv_dump_all_regs(mmio, -1, to_pci_dev(host_set->dev)); writelfl(0, mmio + PCI_IRQ_CAUSE_OFS); handled++; } spin_unlock(&host_set->lock); return IRQ_RETVAL(handled); } /** * mv_check_err - Return the error shadow register to caller. * @ap: ATA channel to manipulate * * Marvell requires DMA to be stopped before accessing shadow * registers. So we do that, then return the needed register. * * LOCKING: * Inherited from caller. FIXME: protect mv_stop_dma with lock? */ static u8 mv_check_err(struct ata_port *ap) { mv_stop_dma(ap); /* can't read shadow regs if DMA on */ return readb((void __iomem *) ap->ioaddr.error_addr); } /** * mv_phy_reset - Perform eDMA reset followed by COMRESET * @ap: ATA channel to manipulate * * Part of this is taken from __sata_phy_reset and modified to * not sleep since this routine gets called from interrupt level. * * LOCKING: * Inherited from caller. This is coded to safe to call at * interrupt level, i.e. it does not sleep. */ static void mv_phy_reset(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); struct ata_taskfile tf; struct ata_device *dev = &ap->device[0]; unsigned long timeout; VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio); mv_stop_dma(ap); writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS); udelay(25); /* allow reset propagation */ /* Spec never mentions clearing the bit. Marvell's driver does * clear the bit, however. */ writelfl(0, port_mmio + EDMA_CMD_OFS); VPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x " "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS), mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL)); /* proceed to init communications via the scr_control reg */ scr_write_flush(ap, SCR_CONTROL, 0x301); mdelay(1); scr_write_flush(ap, SCR_CONTROL, 0x300); timeout = jiffies + (HZ * 1); do { mdelay(10); if ((scr_read(ap, SCR_STATUS) & 0xf) != 1) break; } while (time_before(jiffies, timeout)); VPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x " "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS), mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL)); if (sata_dev_present(ap)) { ata_port_probe(ap); } else { printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n", ap->id, scr_read(ap, SCR_STATUS)); ata_port_disable(ap); return; } ap->cbl = ATA_CBL_SATA; tf.lbah = readb((void __iomem *) ap->ioaddr.lbah_addr); tf.lbam = readb((void __iomem *) ap->ioaddr.lbam_addr); tf.lbal = readb((void __iomem *) ap->ioaddr.lbal_addr); tf.nsect = readb((void __iomem *) ap->ioaddr.nsect_addr); dev->class = ata_dev_classify(&tf); if (!ata_dev_present(dev)) { VPRINTK("Port disabled post-sig: No device present.\n"); ata_port_disable(ap); } VPRINTK("EXIT\n"); } /** * mv_eng_timeout - Routine called by libata when SCSI times out I/O * @ap: ATA channel to manipulate * * Intent is to clear all pending error conditions, reset the * chip/bus, fail the command, and move on. * * LOCKING: * This routine holds the host_set lock while failing the command. */ static void mv_eng_timeout(struct ata_port *ap) { struct ata_queued_cmd *qc; unsigned long flags; printk(KERN_ERR "ata%u: Entering mv_eng_timeout\n",ap->id); DPRINTK("All regs @ start of eng_timeout\n"); mv_dump_all_regs(ap->host_set->mmio_base, ap->port_no, to_pci_dev(ap->host_set->dev)); qc = ata_qc_from_tag(ap, ap->active_tag); printk(KERN_ERR "mmio_base %p ap %p qc %p scsi_cmnd %p &cmnd %p\n", ap->host_set->mmio_base, ap, qc, qc->scsicmd, &qc->scsicmd->cmnd); mv_err_intr(ap); mv_phy_reset(ap); if (!qc) { printk(KERN_ERR "ata%u: BUG: timeout without command\n", ap->id); } else { /* 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. */ spin_lock_irqsave(&ap->host_set->lock, flags); qc->scsidone = scsi_finish_command; ata_qc_complete(qc, ATA_ERR); spin_unlock_irqrestore(&ap->host_set->lock, flags); } } /** * mv_port_init - Perform some early initialization on a single port. * @port: libata data structure storing shadow register addresses * @port_mmio: base address of the port * * Initialize shadow register mmio addresses, clear outstanding * interrupts on the port, and unmask interrupts for the future * start of the port. * * LOCKING: * Inherited from caller. */ static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio) { unsigned long shd_base = (unsigned long) port_mmio + SHD_BLK_OFS; unsigned serr_ofs; /* PIO related setup */ port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA); port->error_addr = port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR); port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT); port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL); port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM); port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH); port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE); port->status_addr = port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS); /* special case: control/altstatus doesn't have ATA_REG_ address */ port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST_OFS; /* unused: */ port->cmd_addr = port->bmdma_addr = port->scr_addr = 0; /* Clear any currently outstanding port interrupt conditions */ serr_ofs = mv_scr_offset(SCR_ERROR); writelfl(readl(port_mmio + serr_ofs), port_mmio + serr_ofs); writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); /* unmask all EDMA error interrupts */ writelfl(~0, port_mmio + EDMA_ERR_IRQ_MASK_OFS); VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n", readl(port_mmio + EDMA_CFG_OFS), readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS), readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS)); } /** * mv_host_init - Perform some early initialization of the host. * @probe_ent: early data struct representing the host * * If possible, do an early global reset of the host. Then do * our port init and clear/unmask all/relevant host interrupts. * * LOCKING: * Inherited from caller. */ static int mv_host_init(struct ata_probe_ent *probe_ent) { int rc = 0, n_hc, port, hc; void __iomem *mmio = probe_ent->mmio_base; void __iomem *port_mmio; if ((MV_FLAG_GLBL_SFT_RST & probe_ent->host_flags) && mv_global_soft_reset(probe_ent->mmio_base)) { rc = 1; goto done; } n_hc = mv_get_hc_count(probe_ent->host_flags); probe_ent->n_ports = MV_PORTS_PER_HC * n_hc; for (port = 0; port < probe_ent->n_ports; port++) { port_mmio = mv_port_base(mmio, port); mv_port_init(&probe_ent->port[port], port_mmio); } for (hc = 0; hc < n_hc; hc++) { void __iomem *hc_mmio = mv_hc_base(mmio, hc); VPRINTK("HC%i: HC config=0x%08x HC IRQ cause " "(before clear)=0x%08x\n", hc, readl(hc_mmio + HC_CFG_OFS), readl(hc_mmio + HC_IRQ_CAUSE_OFS)); /* Clear any currently outstanding hc interrupt conditions */ writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS); } /* Clear any currently outstanding host interrupt conditions */ writelfl(0, mmio + PCI_IRQ_CAUSE_OFS); /* and unmask interrupt generation for host regs */ writelfl(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS); writelfl(~HC_MAIN_MASKED_IRQS, mmio + HC_MAIN_IRQ_MASK_OFS); VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x " "PCI int cause/mask=0x%08x/0x%08x\n", readl(mmio + HC_MAIN_IRQ_CAUSE_OFS), readl(mmio + HC_MAIN_IRQ_MASK_OFS), readl(mmio + PCI_IRQ_CAUSE_OFS), readl(mmio + PCI_IRQ_MASK_OFS)); done: return rc; } /** * mv_print_info - Dump key info to kernel log for perusal. * @probe_ent: early data struct representing the host * * FIXME: complete this. * * LOCKING: * Inherited from caller. */ static void mv_print_info(struct ata_probe_ent *probe_ent) { struct pci_dev *pdev = to_pci_dev(probe_ent->dev); struct mv_host_priv *hpriv = probe_ent->private_data; u8 rev_id, scc; const char *scc_s; /* Use this to determine the HW stepping of the chip so we know * what errata to workaround */ pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id); pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc); if (scc == 0) scc_s = "SCSI"; else if (scc == 0x01) scc_s = "RAID"; else scc_s = "unknown"; printk(KERN_INFO DRV_NAME "(%s) %u slots %u ports %s mode IRQ via %s\n", pci_name(pdev), (unsigned)MV_MAX_Q_DEPTH, probe_ent->n_ports, scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx"); } /** * mv_init_one - handle a positive probe of a Marvell host * @pdev: PCI device found * @ent: PCI device ID entry for the matched host * * LOCKING: * Inherited from caller. */ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version = 0; struct ata_probe_ent *probe_ent = NULL; struct mv_host_priv *hpriv; unsigned int board_idx = (unsigned int)ent->driver_data; void __iomem *mmio_base; int pci_dev_busy = 0, rc; if (!printed_version++) { printk(KERN_INFO DRV_NAME " 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; } probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); if (probe_ent == NULL) { rc = -ENOMEM; goto err_out_regions; } 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, MV_PRIMARY_BAR, 0); if (mmio_base == NULL) { rc = -ENOMEM; goto err_out_free_ent; } hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL); if (!hpriv) { rc = -ENOMEM; goto err_out_iounmap; } memset(hpriv, 0, sizeof(*hpriv)); probe_ent->sht = mv_port_info[board_idx].sht; probe_ent->host_flags = mv_port_info[board_idx].host_flags; probe_ent->pio_mask = mv_port_info[board_idx].pio_mask; probe_ent->udma_mask = mv_port_info[board_idx].udma_mask; probe_ent->port_ops = mv_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; /* initialize adapter */ rc = mv_host_init(probe_ent); if (rc) { goto err_out_hpriv; } /* Enable interrupts */ if (pci_enable_msi(pdev) == 0) { hpriv->hp_flags |= MV_HP_FLAG_MSI; } else { pci_intx(pdev, 1); } mv_dump_pci_cfg(pdev, 0x68); mv_print_info(probe_ent); if (ata_device_add(probe_ent) == 0) { rc = -ENODEV; /* No devices discovered */ goto err_out_dev_add; } kfree(probe_ent); return 0; err_out_dev_add: if (MV_HP_FLAG_MSI & hpriv->hp_flags) { pci_disable_msi(pdev); } else { pci_intx(pdev, 0); } err_out_hpriv: kfree(hpriv); err_out_iounmap: pci_iounmap(pdev, mmio_base); err_out_free_ent: kfree(probe_ent); err_out_regions: pci_release_regions(pdev); err_out: if (!pci_dev_busy) { pci_disable_device(pdev); } return rc; } static int __init mv_init(void) { return pci_module_init(&mv_pci_driver); } static void __exit mv_exit(void) { pci_unregister_driver(&mv_pci_driver); } MODULE_AUTHOR("Brett Russ"); MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, mv_pci_tbl); MODULE_VERSION(DRV_VERSION); module_init(mv_init); module_exit(mv_exit);