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[libata] sata_mv: Minor cleanups and renaming, preparing for new EH &…
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… NCQ

Minor cleanups, new definitions, and code movement, preparing for
upcoming new-EH and NCQ changes.  This commit shoult not change behavior
at all.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
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Jeff Garzik committed Jul 11, 2007
1 parent 814600e commit c5d3e45
Showing 1 changed file with 105 additions and 57 deletions.
162 changes: 105 additions & 57 deletions drivers/ata/sata_mv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -108,8 +108,6 @@ enum {
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,

Expand All @@ -133,18 +131,22 @@ enum {
/* Host Flags */
MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */
MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */
MV_COMMON_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING),
MV_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING,
MV_6XXX_FLAGS = MV_FLAG_IRQ_COALESCE,

CRQB_FLAG_READ = (1 << 0),
CRQB_TAG_SHIFT = 1,
CRQB_IOID_SHIFT = 6, /* CRQB Gen-II/IIE IO Id shift */
CRQB_HOSTQ_SHIFT = 17, /* CRQB Gen-II/IIE HostQueTag shift */
CRQB_CMD_ADDR_SHIFT = 8,
CRQB_CMD_CS = (0x2 << 11),
CRQB_CMD_LAST = (1 << 15),

CRPB_FLAG_STATUS_SHIFT = 8,
CRPB_IOID_SHIFT_6 = 5, /* CRPB Gen-II IO Id shift */
CRPB_IOID_SHIFT_7 = 7, /* CRPB Gen-IIE IO Id shift */

EPRD_FLAG_END_OF_TBL = (1 << 31),

Expand Down Expand Up @@ -236,8 +238,10 @@ enum {
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_SELF_DIS = (1 << 7), /* Gen II/IIE self-disable */
EDMA_ERR_SELF_DIS_5 = (1 << 8), /* Gen I self-disable */
EDMA_ERR_BIST_ASYNC = (1 << 8),
EDMA_ERR_TRANS_IRQ_7 = (1 << 8), /* Gen IIE transprt layer irq */
EDMA_ERR_CRBQ_PAR = (1 << 9),
EDMA_ERR_CRPB_PAR = (1 << 10),
EDMA_ERR_INTRL_PAR = (1 << 11),
Expand All @@ -248,6 +252,8 @@ enum {
EDMA_ERR_LNK_CTRL_TX = (0x1f << 21),
EDMA_ERR_LNK_DATA_TX = (0x1f << 26),
EDMA_ERR_TRANS_PROTO = (1 << 31),
EDMA_ERR_OVERRUN_5 = (1 << 5),
EDMA_ERR_UNDERRUN_5 = (1 << 6),
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 |
Expand Down Expand Up @@ -288,6 +294,7 @@ enum {
/* Port private flags (pp_flags) */
MV_PP_FLAG_EDMA_EN = (1 << 0),
MV_PP_FLAG_EDMA_DS_ACT = (1 << 1),
MV_PP_FLAG_HAD_A_RESET = (1 << 2),
};

#define IS_50XX(hpriv) ((hpriv)->hp_flags & MV_HP_50XX)
Expand Down Expand Up @@ -417,12 +424,30 @@ static void mv_channel_reset(struct mv_host_priv *hpriv, void __iomem *mmio,
unsigned int port_no);
static void mv_stop_and_reset(struct ata_port *ap);

static struct scsi_host_template mv_sht = {
static struct scsi_host_template mv5_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = MV_MAX_SG_CT,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = 1,
.proc_name = DRV_NAME,
.dma_boundary = MV_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
};

static struct scsi_host_template mv6_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.can_queue = MV_USE_Q_DEPTH,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = MV_MAX_SG_CT,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
Expand Down Expand Up @@ -530,38 +555,38 @@ static const struct ata_port_info mv_port_info[] = {
.port_ops = &mv5_ops,
},
{ /* chip_508x */
.flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC),
.flags = MV_COMMON_FLAGS | MV_FLAG_DUAL_HC,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = ATA_UDMA6,
.port_ops = &mv5_ops,
},
{ /* chip_5080 */
.flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC),
.flags = MV_COMMON_FLAGS | MV_FLAG_DUAL_HC,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = ATA_UDMA6,
.port_ops = &mv5_ops,
},
{ /* chip_604x */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
.flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = ATA_UDMA6,
.port_ops = &mv6_ops,
},
{ /* chip_608x */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS |
MV_FLAG_DUAL_HC),
.flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS |
MV_FLAG_DUAL_HC,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = ATA_UDMA6,
.port_ops = &mv6_ops,
},
{ /* chip_6042 */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
.flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = ATA_UDMA6,
.port_ops = &mv_iie_ops,
},
{ /* chip_7042 */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
.flags = MV_COMMON_FLAGS | MV_6XXX_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = ATA_UDMA6,
.port_ops = &mv_iie_ops,
Expand Down Expand Up @@ -709,6 +734,41 @@ static void mv_irq_clear(struct ata_port *ap)
{
}

static void mv_set_edma_ptrs(void __iomem *port_mmio,
struct mv_host_priv *hpriv,
struct mv_port_priv *pp)
{
/*
* initialize request queue
*/
WARN_ON(pp->crqb_dma & 0x3ff);
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);

if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
writelfl(pp->crqb_dma & 0xffffffff,
port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
else
writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);

/*
* initialize response queue
*/
WARN_ON(pp->crpb_dma & 0xff);
writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS);

if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
writelfl(pp->crpb_dma & 0xffffffff,
port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
else
writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);

writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK,
port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);

}

/**
* mv_start_dma - Enable eDMA engine
* @base: port base address
Expand All @@ -720,9 +780,10 @@ static void mv_irq_clear(struct ata_port *ap)
* LOCKING:
* Inherited from caller.
*/
static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp)
static void mv_start_dma(void __iomem *base, struct mv_host_priv *hpriv,
struct mv_port_priv *pp)
{
if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) {
if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
writelfl(EDMA_EN, base + EDMA_CMD_OFS);
pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
}
Expand All @@ -739,12 +800,12 @@ static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp)
* LOCKING:
* Inherited from caller.
*/
static void mv_stop_dma(struct ata_port *ap)
static int 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;
int i, err = 0;

if (MV_PP_FLAG_EDMA_EN & pp->pp_flags) {
/* Disable EDMA if active. The disable bit auto clears.
Expand All @@ -764,10 +825,13 @@ static void mv_stop_dma(struct ata_port *ap)
udelay(100);
}

if (EDMA_EN & reg) {
if (reg & EDMA_EN) {
ata_port_printk(ap, KERN_ERR, "Unable to stop eDMA\n");
/* FIXME: Consider doing a reset here to recover */
err = -EIO;
}

return err;
}

#ifdef ATA_DEBUG
Expand Down Expand Up @@ -884,12 +948,13 @@ static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
writelfl(val, mv_ap_base(ap) + ofs);
}

static void mv_edma_cfg(struct mv_host_priv *hpriv, void __iomem *port_mmio)
static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
void __iomem *port_mmio)
{
u32 cfg = readl(port_mmio + EDMA_CFG_OFS);

/* set up non-NCQ EDMA configuration */
cfg &= ~(1 << 9); /* disable equeue */
cfg &= ~(1 << 9); /* disable eQue */

if (IS_GEN_I(hpriv)) {
cfg &= ~0x1f; /* clear queue depth */
Expand Down Expand Up @@ -971,28 +1036,9 @@ static int mv_port_start(struct ata_port *ap)
pp->sg_tbl = mem;
pp->sg_tbl_dma = mem_dma;

mv_edma_cfg(hpriv, port_mmio);

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);

if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
writelfl(pp->crqb_dma & 0xffffffff,
port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
else
writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);

writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS);
mv_edma_cfg(ap, hpriv, port_mmio);

if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
writelfl(pp->crpb_dma & 0xffffffff,
port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
else
writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);

writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK,
port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
mv_set_edma_ptrs(port_mmio, hpriv, pp);

/* 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
Expand Down Expand Up @@ -1088,7 +1134,7 @@ static void mv_qc_prep(struct ata_queued_cmd *qc)
u16 flags = 0;
unsigned in_index;

if (ATA_PROT_DMA != qc->tf.protocol)
if (qc->tf.protocol != ATA_PROT_DMA)
return;

/* Fill in command request block
Expand Down Expand Up @@ -1180,7 +1226,7 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
unsigned in_index;
u32 flags = 0;

if (ATA_PROT_DMA != qc->tf.protocol)
if (qc->tf.protocol != ATA_PROT_DMA)
return;

/* Fill in Gen IIE command request block
Expand Down Expand Up @@ -1241,17 +1287,19 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
*/
static unsigned 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;
struct ata_port *ap = qc->ap;
void __iomem *port_mmio = mv_ap_base(ap);
struct mv_port_priv *pp = ap->private_data;
struct mv_host_priv *hpriv = ap->host->private_data;
unsigned in_index;
u32 in_ptr;

if (ATA_PROT_DMA != qc->tf.protocol) {
if (qc->tf.protocol != ATA_PROT_DMA) {
/* 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);
mv_stop_dma(ap);
return ata_qc_issue_prot(qc);
}

Expand All @@ -1264,7 +1312,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)

in_index = mv_inc_q_index(in_index); /* now incr producer index */

mv_start_dma(port_mmio, pp);
mv_start_dma(port_mmio, hpriv, pp);

/* and write the request in pointer to kick the EDMA to life */
in_ptr &= EDMA_REQ_Q_BASE_LO_MASK;
Expand Down Expand Up @@ -1379,7 +1427,8 @@ static void mv_host_intr(struct ata_host *host, u32 relevant, unsigned int hc)
void __iomem *hc_mmio = mv_hc_base(mmio, hc);
struct ata_queued_cmd *qc;
u32 hc_irq_cause;
int shift, port, port0, hard_port, handled;
int port, port0;
int shift, hard_port, handled;
unsigned int err_mask;

if (hc == 0)
Expand Down Expand Up @@ -1458,10 +1507,9 @@ static void mv_host_intr(struct ata_host *host, u32 relevant, unsigned int hc)
}

/**
* mv_interrupt -
* mv_interrupt - Main interrupt event handler
* @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
Expand Down Expand Up @@ -1965,7 +2013,7 @@ static void __mv_phy_reset(struct ata_port *ap, int can_sleep)
void __iomem *port_mmio = mv_ap_base(ap);
struct ata_taskfile tf;
struct ata_device *dev = &ap->device[0];
unsigned long timeout;
unsigned long deadline;
int retry = 5;
u32 sstatus;

Expand All @@ -1983,14 +2031,14 @@ static void __mv_phy_reset(struct ata_port *ap, int can_sleep)
sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
__msleep(20, can_sleep);

timeout = jiffies + msecs_to_jiffies(200);
deadline = jiffies + msecs_to_jiffies(200);
do {
sata_scr_read(ap, SCR_STATUS, &sstatus);
if (((sstatus & 0x3) == 3) || ((sstatus & 0x3) == 0))
break;

__msleep(1, can_sleep);
} while (time_before(jiffies, timeout));
} while (time_before(jiffies, deadline));

/* work around errata */
if (IS_60XX(hpriv) &&
Expand Down Expand Up @@ -2427,7 +2475,7 @@ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)

pci_set_master(pdev);
return ata_host_activate(host, pdev->irq, mv_interrupt, IRQF_SHARED,
&mv_sht);
IS_GEN_I(hpriv) ? &mv5_sht : &mv6_sht);
}

static int __init mv_init(void)
Expand Down

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