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Message-ID: <53f198c00707060131x1e1abdd7l4396c7fede360970@mail.gmail.com>
Date: Fri, 6 Jul 2007 16:31:00 +0800
From: "kuan luo" <kuanluo@...il.com>
To: linux-kernel@...r.kernel.org
Cc: jeff@...zik.org, akpm@...ux-foundation.org, zboszor@...aweb.hu,
hancockr@...w.ca, prakash@...noor.de, pchen@...dia.com,
kluo@...dia.com
Subject: [PATCH] ata: Add the SW NCQ support to sata_nv for MCP51/MCP55/MCP61
From: Kuan Luo <kluo@...dia.com>
Add the Software NCQ support to sata_nv.c for MCP51/MCP55/MCP61 SATA
controller. NCQ function is disable by default, you can enable it with
'swncq=1'. NCQ will be turned off if the drive is Maxtor on MCP51 or
MCP55 rev 0xa2 platform.
Signed-off-by: Kuan Luo <kluo@...dia.com>
Signed-off-by: Peer Chen <pchen@...dia.com>
---
drivers/ata/sata_nv.c | 859 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 850 insertions(+), 9 deletions(-)
diff -purN a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
--- a/drivers/ata/sata_nv.c 2007-06-13 10:15:07.000000000 -0400
+++ b/drivers/ata/sata_nv.c 2007-07-05 10:20:29.000000000 -0400
@@ -169,6 +169,35 @@ enum {
NV_ADMA_PORT_REGISTER_MODE = (1 << 0),
NV_ADMA_ATAPI_SETUP_COMPLETE = (1 << 1),
+ /* MCP55 reg offset */
+ NV_CTL_MCP55 = 0x400,
+ NV_INT_STATUS_MCP55 = 0x440,
+ NV_INT_ENABLE_MCP55 = 0x444,
+ NV_NCQ_REG_MCP55 = 0x448,
+
+ /* MCP55 */
+ NV_INT_ALL_MCP55 = 0xffff,
+ NV_INT_PORT_SHIFT_MCP55 = 16, /* each port occupies 16 bits */
+ NV_INT_MASK_MCP55 = NV_INT_ALL_MCP55 & 0xfffd,
+
+ /* SWNCQ ENABLE BITS*/
+ NV_CTL_PRI_SWNCQ = 0x02,
+ NV_CTL_SEC_SWNCQ = 0x04,
+
+ /* SW NCQ status bits*/
+ NV_SWNCQ_IRQ_DEV = (1 << 0),
+ NV_SWNCQ_IRQ_PM = (1 << 1),
+ NV_SWNCQ_IRQ_ADDED = (1 << 2),
+ NV_SWNCQ_IRQ_REMOVED = (1 << 3),
+
+ NV_SWNCQ_IRQ_BACKOUT = (1 << 4),
+ NV_SWNCQ_IRQ_SDBFIS = (1 << 5),
+ NV_SWNCQ_IRQ_DHREGFIS = (1 << 6),
+ NV_SWNCQ_IRQ_DMASETUP = (1 << 7),
+
+ NV_SWNCQ_IRQ_HOTPLUG = NV_SWNCQ_IRQ_ADDED |
+ NV_SWNCQ_IRQ_REMOVED,
+
};
/* ADMA Physical Region Descriptor - one SG segment */
@@ -226,6 +255,37 @@ struct nv_host_priv {
unsigned long type;
};
+struct defer_queue {
+ u32 defer_bits;
+ unsigned int head;
+ unsigned int tail;
+ unsigned int tag[ATA_MAX_QUEUE];
+};
+
+struct nv_swncq_port_priv {
+ struct ata_prd *prd; /* our SG list */
+ dma_addr_t prd_dma; /* and its DMA mapping */
+ void __iomem *sactive_block;
+ void __iomem *irq_block;
+ void __iomem *tag_block;
+ u32 qc_active;
+ unsigned int last_issue_tag;
+ spinlock_t lock;
+ /* fifo circular queue to store deferral command */
+ struct defer_queue defer_queue;
+
+ /* for NCQ interrupt analysis */
+ u32 dhfis_bits;
+ u32 dmafis_bits;
+ u32 sdbfis_bits;
+
+ unsigned int ncq_saw_d2h:1;
+ unsigned int ncq_saw_dmas:1;
+ unsigned int ncq_saw_sdb:1;
+ unsigned int ncq_saw_backout:1;
+};
+
+
#define NV_ADMA_CHECK_INTR(GCTL, PORT) ((GCTL) & ( 1 << (19 + (12 * (PORT)))))
static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
@@ -263,13 +323,29 @@ static void nv_adma_host_stop(struct ata
static void nv_adma_post_internal_cmd(struct ata_queued_cmd *qc);
static void nv_adma_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
+static void nv_mcp55_thaw(struct ata_port *ap);
+static void nv_mcp55_freeze(struct ata_port *ap);
+static void nv_swncq_error_handler(struct ata_port *ap);
+static int nv_swncq_slave_config(struct scsi_device *sdev);
+static int nv_swncq_port_start(struct ata_port *ap);
+static void nv_swncq_qc_prep(struct ata_queued_cmd *qc);
+static void nv_swncq_fill_sg(struct ata_queued_cmd *qc);
+static unsigned int nv_swncq_qc_issue(struct ata_queued_cmd *qc);
+static void nv_swncq_irq_clear(struct ata_port *ap, u16 fis);
+static irqreturn_t nv_swncq_interrupt(int irq, void *dev_instance);
+#ifdef CONFIG_PM
+static int nv_swncq_port_suspend(struct ata_port *ap, pm_message_t mesg);
+static int nv_swncq_port_resume(struct ata_port *ap);
+#endif
+
enum nv_host_type
{
GENERIC,
NFORCE2,
NFORCE3 = NFORCE2, /* NF2 == NF3 as far as sata_nv is concerned */
CK804,
- ADMA
+ ADMA,
+ SWNCQ
};
static const struct pci_device_id nv_pci_tbl[] = {
@@ -280,13 +356,13 @@ static const struct pci_device_id nv_pci
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA2), CK804 },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA), CK804 },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA2), CK804 },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA), GENERIC },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2), GENERIC },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA), GENERIC },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2), GENERIC },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA), GENERIC },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2), GENERIC },
- { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3), GENERIC },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA), SWNCQ },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2), SWNCQ },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA), SWNCQ },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2), SWNCQ },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA), SWNCQ },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2), SWNCQ },
+ { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3), SWNCQ },
{ } /* terminate list */
};
@@ -338,6 +414,24 @@ static struct scsi_host_template nv_adma
.bios_param = ata_std_bios_param,
};
+static struct scsi_host_template nv_swncq_sht = {
+ .module = THIS_MODULE,
+ .name = DRV_NAME,
+ .ioctl = ata_scsi_ioctl,
+ .queuecommand = ata_scsi_queuecmd,
+ .can_queue = ATA_MAX_QUEUE,
+ .this_id = ATA_SHT_THIS_ID,
+ .sg_tablesize = LIBATA_MAX_PRD,
+ .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
+ .emulated = ATA_SHT_EMULATED,
+ .use_clustering = ATA_SHT_USE_CLUSTERING,
+ .proc_name = DRV_NAME,
+ .dma_boundary = ATA_DMA_BOUNDARY,
+ .slave_configure = nv_swncq_slave_config,
+ .slave_destroy = ata_scsi_slave_destroy,
+ .bios_param = ata_std_bios_param,
+};
+
static const struct ata_port_operations nv_generic_ops = {
.port_disable = ata_port_disable,
.tf_load = ata_tf_load,
@@ -450,6 +544,36 @@ static const struct ata_port_operations
.host_stop = nv_adma_host_stop,
};
+static const struct ata_port_operations nv_swncq_ops = {
+ .port_disable = ata_port_disable,
+ .tf_load = ata_tf_load,
+ .tf_read = ata_tf_read,
+ .exec_command = ata_exec_command,
+ .check_status = ata_check_status,
+ .dev_select = ata_std_dev_select,
+ .bmdma_setup = ata_bmdma_setup,
+ .bmdma_start = ata_bmdma_start,
+ .bmdma_stop = ata_bmdma_stop,
+ .bmdma_status = ata_bmdma_status,
+ .qc_prep = nv_swncq_qc_prep,
+ .qc_issue = nv_swncq_qc_issue,
+ .freeze = nv_mcp55_freeze,
+ .thaw = nv_mcp55_thaw,
+ .error_handler = nv_swncq_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+ .data_xfer = ata_data_xfer,
+ .irq_clear = ata_bmdma_irq_clear,
+ .irq_on = ata_irq_on,
+ .irq_ack = ata_irq_ack,
+ .scr_read = nv_scr_read,
+ .scr_write = nv_scr_write,
+#ifdef CONFIG_PM
+ .port_suspend = nv_swncq_port_suspend,
+ .port_resume = nv_swncq_port_resume,
+#endif
+ .port_start = nv_swncq_port_start,
+};
+
static const struct ata_port_info nv_port_info[] = {
/* generic */
{
@@ -496,6 +620,17 @@ static const struct ata_port_info nv_por
.port_ops = &nv_adma_ops,
.irq_handler = nv_adma_interrupt,
},
+ /* SWNCQ */
+ {
+ .sht = &nv_swncq_sht,
+ .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
+ ATA_FLAG_HRST_TO_RESUME,
+ .pio_mask = NV_PIO_MASK,
+ .mwdma_mask = NV_MWDMA_MASK,
+ .udma_mask = NV_UDMA_MASK,
+ .port_ops = &nv_swncq_ops,
+ .irq_handler = nv_swncq_interrupt,
+ },
};
MODULE_AUTHOR("NVIDIA");
@@ -505,6 +640,7 @@ MODULE_DEVICE_TABLE(pci, nv_pci_tbl);
MODULE_VERSION(DRV_VERSION);
static int adma_enabled = 1;
+static int swncq_enabled;
static void nv_adma_register_mode(struct ata_port *ap)
{
@@ -1454,6 +1590,34 @@ static void nv_ck804_thaw(struct ata_por
writeb(mask, mmio_base + NV_INT_ENABLE_CK804);
}
+static void nv_mcp55_freeze(struct ata_port *ap)
+{
+ void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR];
+ int shift = ap->port_no * NV_INT_PORT_SHIFT_MCP55;
+ u32 mask;
+
+ writel(NV_INT_ALL_MCP55 << shift, mmio_base + NV_INT_STATUS_MCP55);
+
+ mask = readl(mmio_base + NV_INT_ENABLE_MCP55);
+ mask &= ~(NV_INT_ALL_MCP55 << shift);
+ writel(mask, mmio_base + NV_INT_ENABLE_MCP55);
+ ata_bmdma_freeze(ap);
+}
+
+static void nv_mcp55_thaw(struct ata_port *ap)
+{
+ void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR];
+ int shift = ap->port_no * NV_INT_PORT_SHIFT_MCP55;
+ u32 mask;
+
+ writel(NV_INT_ALL_MCP55 << shift, mmio_base + NV_INT_STATUS_MCP55);
+
+ mask = readl(mmio_base + NV_INT_ENABLE_MCP55);
+ mask |= (NV_INT_MASK_MCP55 << shift);
+ writel(mask, mmio_base + NV_INT_ENABLE_MCP55);
+ ata_bmdma_thaw(ap);
+}
+
static int nv_hardreset(struct ata_port *ap, unsigned int *class,
unsigned long deadline)
{
@@ -1527,6 +1691,677 @@ static void nv_adma_error_handler(struct
nv_hardreset, ata_std_postreset);
}
+static void nv_swncq_qc_to_dq(struct ata_port *ap, struct ata_queued_cmd *qc)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ struct defer_queue *dq = &pp->defer_queue;
+
+ /* queue is full */
+ WARN_ON(dq->tail - dq->head == ATA_MAX_QUEUE);
+ dq->defer_bits |= (1 << qc->tag);
+ dq->tag[dq->tail++ & (ATA_MAX_QUEUE - 1)] = qc->tag;
+}
+
+static struct ata_queued_cmd *nv_swncq_qc_from_dq(struct ata_port *ap)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ struct defer_queue *dq = &pp->defer_queue;
+ unsigned int tag;
+
+ if (dq->head == dq->tail) /* null queue */
+ return NULL;
+
+ tag = dq->tag[dq->head & (ATA_MAX_QUEUE - 1)];
+ dq->tag[dq->head++ & (ATA_MAX_QUEUE - 1)] = ATA_TAG_POISON;
+ WARN_ON(!(dq->defer_bits & (1 << tag)));
+ dq->defer_bits &= ~(1 << tag);
+
+ return ata_qc_from_tag(ap, tag);
+}
+
+static void nv_swncq_bmdma_stop(struct ata_port *ap)
+{
+ /* clear start/stop bit */
+ iowrite8(ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START,
+ ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+ ata_altstatus(ap);
+}
+
+static void nv_swncq_fis_reinit(struct ata_port *ap)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+
+ pp->dhfis_bits = 0;
+ pp->dmafis_bits = 0;
+ pp->sdbfis_bits = 0;
+ pp->ncq_saw_d2h = 0;
+ pp->ncq_saw_dmas = 0;
+ pp->ncq_saw_sdb = 0;
+ pp->ncq_saw_backout = 0;
+}
+
+static void nv_swncq_pp_reinit(struct ata_port *ap)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ struct defer_queue *dq = &pp->defer_queue;
+
+ dq->head = dq->tail = 0;
+ dq->defer_bits = 0;
+ pp->qc_active = 0;
+ pp->last_issue_tag = ATA_TAG_POISON;
+ nv_swncq_fis_reinit(ap);
+}
+
+static void nv_swncq_irq_clear(struct ata_port *ap, u16 fis)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+
+ writew(fis, pp->irq_block);
+}
+
+static void nv_swncq_ncq_stop(struct ata_port *ap)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ unsigned int i;
+ u32 sactive;
+ u32 done_mask;
+
+ ata_port_printk(ap, KERN_ERR,
+ "EH in SWNCQ mode,QC:qc_active 0x%X sactive 0x%X\n",
+ ap->qc_active, ap->sactive);
+ ata_port_printk(ap, KERN_ERR,
+ "SWNCQ:qc_active 0x%X defer_bits 0x%X last_issue_tag 0x%x\n "
+ "dhfis 0x%X dmafis 0x%X sdbfis 0x%X\n",
+ pp->qc_active, pp->defer_queue.defer_bits, pp->last_issue_tag,
+ pp->dhfis_bits, pp->dmafis_bits, pp->sdbfis_bits);
+
+ ata_port_printk(ap, KERN_ERR, "ATA_REG 0x%X ERR_REG 0x%X\n",
+ ap->ops->check_status(ap),
+ ioread8(ap->ioaddr.error_addr));
+
+ sactive = readl(pp->sactive_block);
+ done_mask = pp->qc_active ^ sactive;
+
+ ata_port_printk(ap, KERN_ERR, "tag : dhfis dmafis sdbfis sacitve\n");
+ for (i = 0; i < ATA_MAX_QUEUE; i++) {
+ u8 err = 0;
+ if (pp->qc_active & (1 << i))
+ err = 0;
+ else if (done_mask & (1 << i))
+ err = 1;
+ else
+ continue;
+
+ ata_port_printk(ap, KERN_ERR,
+ "tag 0x%x: %01x %01x %01x %01x %s\n", i,
+ (pp->dhfis_bits >> i) & 0x1,
+ (pp->dmafis_bits >> i) & 0x1,
+ (pp->sdbfis_bits >> i) & 0x1,
+ (sactive >> i) & 0x1,
+ (err ? "error! tag doesn't exit" : " "));
+ }
+
+ nv_swncq_pp_reinit(ap);
+ ap->ops->irq_clear(ap);
+ nv_swncq_bmdma_stop(ap);
+ nv_swncq_irq_clear(ap, 0xffff);
+}
+
+static void nv_swncq_error_handler(struct ata_port *ap)
+{
+ struct ata_eh_context *ehc = &ap->eh_context;
+
+ if (ap->sactive) {
+ nv_swncq_ncq_stop(ap);
+ ehc->i.action |= ATA_EH_HARDRESET;
+ }
+
+ ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset,
+ nv_hardreset, ata_std_postreset);
+}
+
+#ifdef CONFIG_PM
+static int nv_swncq_port_suspend(struct ata_port *ap, pm_message_t mesg)
+{
+ void __iomem *mmio = ap->host->iomap[NV_MMIO_BAR];
+ u32 tmp;
+
+ /* clear irq */
+ writel(~0, mmio + NV_INT_STATUS_MCP55);
+
+ if (!(ap->flags & ATA_FLAG_NCQ))
+ return 0;
+
+ /* disable irq */
+ writel(0, mmio + NV_INT_ENABLE_MCP55);
+
+ /* disable swncq */
+ tmp = readl(mmio + NV_CTL_MCP55);
+ tmp &= ~(NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ);
+ writel(tmp, mmio + NV_CTL_MCP55);
+
+ return 0;
+}
+
+static int nv_swncq_port_resume(struct ata_port *ap)
+{
+ void __iomem *mmio = ap->host->iomap[NV_MMIO_BAR];
+ u32 tmp;
+
+ /* clear irq */
+ writel(~0, mmio + NV_INT_STATUS_MCP55);
+
+ if (!(ap->flags & ATA_FLAG_NCQ))
+ return 0;
+
+ /* enable irq */
+ writel(0x00fd00fd, mmio + NV_INT_ENABLE_MCP55);
+
+ /* enable swncq */
+ tmp = readl(mmio + NV_CTL_MCP55);
+ writel(tmp | NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ, mmio + NV_CTL_MCP55);
+
+ return 0;
+}
+#endif
+
+static void nv_swncq_host_init(struct ata_host *host)
+{
+ u32 tmp;
+ void __iomem *mmio = host->iomap[NV_MMIO_BAR];
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+ u8 regval;
+ unsigned int i;
+
+ /* disable ECO 398 */
+ pci_read_config_byte(pdev, 0x7f, ®val);
+ regval &= ~(1 << 7);
+ pci_write_config_byte(pdev, 0x7f, regval);
+
+ /* enable swncq */
+ tmp = readl(mmio + NV_CTL_MCP55);
+ VPRINTK("HOST_CTL:0x%X\n", tmp);
+ writel(tmp | NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ, mmio + NV_CTL_MCP55);
+
+ for (i = 0; i < host->n_ports; i++)
+ host->ports[i]->flags |= ATA_FLAG_NCQ;
+
+ /* enable irq intr */
+ tmp = readl(mmio + NV_INT_ENABLE_MCP55);
+ VPRINTK("HOST_ENABLE:0x%X\n", tmp);
+ writel(tmp | 0x00fd00fd, mmio + NV_INT_ENABLE_MCP55);
+
+ /* clear port irq */
+ writel(~0x0, mmio + NV_INT_STATUS_MCP55);
+}
+
+static int nv_swncq_slave_config(struct scsi_device *sdev)
+{
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ struct ata_device *dev;
+ int rc;
+ u8 rev;
+ u8 check_maxtor = 0;
+ unsigned char model_num[ATA_ID_PROD_LEN + 1];
+
+ rc = ata_scsi_slave_config(sdev);
+ if (sdev->id >= ATA_MAX_DEVICES || sdev->channel || sdev->lun)
+ /* Not a proper libata device, ignore */
+ return rc;
+
+ dev = &ap->device[sdev->id];
+ if (!(ap->flags & ATA_FLAG_NCQ) || dev->class == ATA_DEV_ATAPI)
+ return rc;
+
+ /* if MCP51 and Maxtor, then disable ncq */
+ if (pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA ||
+ pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2)
+ check_maxtor = 1;
+
+ /* if MCP55 and rev <= a2 and Maxtor, then disable ncq */
+ if (pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA ||
+ pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2) {
+ pci_read_config_byte(pdev, 0x8, &rev);
+ if (rev <= 0xa2)
+ check_maxtor = 1;
+ }
+
+ if (!check_maxtor)
+ return rc;
+
+ ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
+
+ if (strncmp(model_num, "Maxtor", 6) == 0) {
+ ata_scsi_change_queue_depth(sdev, 1);
+ ata_dev_printk(dev, KERN_NOTICE,
+ "Disabling SWNCQ mode (depth %x)\n", sdev->queue_depth);
+ }
+
+ return rc;
+}
+
+static int nv_swncq_port_start(struct ata_port *ap)
+{
+ struct device *dev = ap->host->dev;
+ void __iomem *mmio = ap->host->iomap[NV_MMIO_BAR];
+ struct nv_swncq_port_priv *pp;
+ int rc;
+
+ rc = ata_port_start(ap);
+ if (rc)
+ return rc;
+
+ pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
+ if (!pp)
+ return -ENOMEM;
+
+ pp->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ * ATA_MAX_QUEUE,
+ &pp->prd_dma, GFP_KERNEL);
+ if (!pp->prd)
+ return -ENOMEM;
+ memset(pp->prd, 0, ATA_PRD_TBL_SZ * ATA_MAX_QUEUE);
+
+ ap->private_data = pp;
+ pp->sactive_block = ap->ioaddr.scr_addr + 4 * SCR_ACTIVE;
+ pp->irq_block = mmio + NV_INT_STATUS_MCP55 + ap->port_no * 2;
+ pp->tag_block = mmio + NV_NCQ_REG_MCP55 + ap->port_no * 2;
+ spin_lock_init(&pp->lock);
+
+ return 0;
+}
+
+static void nv_swncq_qc_prep(struct ata_queued_cmd *qc)
+{
+ if (qc->tf.protocol != ATA_PROT_NCQ) {
+ ata_qc_prep(qc);
+ return;
+ }
+
+ if (!(qc->flags & ATA_QCFLAG_DMAMAP))
+ return;
+
+ nv_swncq_fill_sg(qc);
+}
+
+static void nv_swncq_fill_sg(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct scatterlist *sg;
+ unsigned int idx;
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ struct ata_prd *prd;
+
+ WARN_ON(qc->__sg == NULL);
+ WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
+
+ prd = pp->prd + ATA_MAX_PRD * qc->tag;
+
+ idx = 0;
+ ata_for_each_sg(sg, qc) {
+ u32 addr, offset;
+ u32 sg_len, len;
+
+ 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);
+
+ idx++;
+ sg_len -= len;
+ addr += len;
+ }
+ }
+
+ if (idx)
+ prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
+}
+
+static unsigned int nv_swncq_issue_atacmd(struct ata_port *ap,
+ struct ata_queued_cmd *qc)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+
+ if (qc == NULL)
+ return 0;
+
+ DPRINTK("Enter\n");
+
+ writel((1 << qc->tag), pp->sactive_block);
+ pp->last_issue_tag = qc->tag;
+ pp->dhfis_bits &= ~(1 << qc->tag);
+ pp->dmafis_bits &= ~(1 << qc->tag);
+ pp->qc_active |= (0x1 << qc->tag);
+
+ ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
+ ap->ops->exec_command(ap, &qc->tf);
+
+ DPRINTK("Issued tag %u\n", qc->tag);
+
+ return 0;
+}
+
+static unsigned int nv_swncq_qc_issue(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ unsigned long flags;
+
+ if (qc->tf.protocol != ATA_PROT_NCQ)
+ return ata_qc_issue_prot(qc);
+
+ DPRINTK("Enter\n");
+ spin_lock_irqsave(&pp->lock, flags);
+ if (!pp->qc_active)
+ nv_swncq_issue_atacmd(ap, qc);
+ else
+ nv_swncq_qc_to_dq(ap, qc); /* add qc to defer queue */
+ spin_unlock_irqrestore(&pp->lock, flags);
+ return 0;
+}
+
+static void nv_swncq_hotplug(struct ata_port *ap, u32 fis)
+{
+ u32 serror;
+ struct ata_eh_info *ehi = &ap->eh_info;
+
+ ata_ehi_clear_desc(ehi);
+
+ /* AHCI needs SError cleared; otherwise, it might lock up */
+ sata_scr_read(ap, SCR_ERROR, &serror);
+ sata_scr_write(ap, SCR_ERROR, serror);
+
+ /* analyze @irq_stat */
+ if (fis & NV_SWNCQ_IRQ_ADDED)
+ ata_ehi_push_desc(ehi, "hot plug");
+ else if (fis & NV_SWNCQ_IRQ_REMOVED)
+ ata_ehi_push_desc(ehi, "hot unplug");
+
+ ata_ehi_hotplugged(ehi);
+
+ /* okay, let's hand over to EH */
+ ehi->serror |= serror;
+
+ ata_port_freeze(ap);
+}
+
+static int nv_swncq_sdbfis(struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc;
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ struct ata_eh_info *ehi = &ap->eh_info;
+ u32 sactive;
+ int nr_done = 0;
+ u32 done_mask;
+ int i;
+ u8 host_stat;
+ u8 lack_dhfis = 0;
+
+ host_stat = ap->ops->bmdma_status(ap);
+ if (unlikely(host_stat & ATA_DMA_ERR)) {
+ /* error when transfering data to/from memory */
+ ata_ehi_clear_desc(ehi);
+ ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
+ ehi->err_mask |= AC_ERR_HOST_BUS;
+ ehi->action |= ATA_EH_SOFTRESET;
+ return -EINVAL;
+ }
+
+ ap->ops->irq_clear(ap);
+ nv_swncq_bmdma_stop(ap);
+
+ sactive = readl(pp->sactive_block);
+ done_mask = pp->qc_active ^ sactive;
+
+ if (unlikely(done_mask & sactive)) {
+ ata_ehi_clear_desc(ehi);
+ ata_ehi_push_desc(ehi, "illegal SWNCQ:qc_active transition"
+ "(%08x->%08x)", pp->qc_active, sactive);
+ ehi->err_mask |= AC_ERR_HSM;
+ ehi->action |= ATA_EH_HARDRESET;
+ return -EINVAL;
+ }
+ for (i = 0; i < ATA_MAX_QUEUE; i++) {
+ if (!(done_mask & (1 << i)))
+ continue;
+
+ qc = ata_qc_from_tag(ap, i);
+ if (qc) {
+ ata_qc_complete(qc);
+ pp->qc_active &= ~(1 << i);
+ pp->dhfis_bits &= ~(1 << i);
+ pp->dmafis_bits &= ~(1 << i);
+ pp->sdbfis_bits |= (1 << i);
+ nr_done++;
+ }
+ }
+
+ if (!ap->qc_active) {
+ DPRINTK("over\n");
+ nv_swncq_pp_reinit(ap);
+ return nr_done;
+ }
+
+ if (pp->qc_active & pp->dhfis_bits)
+ return nr_done;
+
+ if (pp->ncq_saw_backout || (pp->qc_active ^ pp->dhfis_bits))
+ /* if the controller cann't get a device to host register FIS,
+ * The driver needs to reissue the new command.
+ */
+ lack_dhfis = 1;
+
+ DPRINTK("id 0x%x QC: qc_active 0x%x,"
+ "SWNCQ:qc_active 0x%X defer_bits %X "
+ "dhfis 0x%X dmafis 0x%X last_issue_tag %x\n",
+ ap->print_id, ap->qc_active, pp->qc_active,
+ pp->defer_queue.defer_bits, pp->dhfis_bits,
+ pp->dmafis_bits, pp->last_issue_tag);
+
+ nv_swncq_fis_reinit(ap);
+
+ if (lack_dhfis) {
+ qc = ata_qc_from_tag(ap, pp->last_issue_tag);
+ nv_swncq_issue_atacmd(ap, qc);
+ return nr_done;
+ }
+
+ if (pp->defer_queue.defer_bits) {
+ /* send deferral queue command */
+ qc = nv_swncq_qc_from_dq(ap);
+ WARN_ON(qc == NULL);
+ nv_swncq_issue_atacmd(ap, qc);
+ }
+
+ return nr_done;
+}
+
+static inline u32 nv_swncq_tag(struct ata_port *ap)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ u32 tag;
+
+ tag = readb(pp->tag_block) >> 2;
+ return (tag & 0x1f);
+}
+
+static int nv_swncq_dmafis(struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc;
+ unsigned int rw;
+ u8 dmactl;
+ u32 tag;
+ struct nv_swncq_port_priv *pp = ap->private_data;
+
+ nv_swncq_bmdma_stop(ap);
+ tag = nv_swncq_tag(ap);
+
+ DPRINTK("dma setup tag 0x%x\n", tag);
+ qc = ata_qc_from_tag(ap, tag);
+
+ if (unlikely(!qc))
+ return 0;
+
+ rw = qc->tf.flags & ATA_TFLAG_WRITE;
+
+ /* load PRD table addr. */
+ iowrite32(pp->prd_dma + ATA_PRD_TBL_SZ * qc->tag,
+ ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
+
+ /* specify data direction, triple-check start bit is clear */
+ dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+ dmactl &= ~ATA_DMA_WR;
+ if (!rw)
+ dmactl |= ATA_DMA_WR;
+
+ iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+
+ return 1;
+}
+
+static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis)
+{
+ struct nv_swncq_port_priv *pp = ap->private_data;
+ struct ata_queued_cmd *qc;
+ struct ata_eh_info *ehi = &ap->eh_info;
+ u32 serror;
+ u8 ata_stat;
+ int rc = 0;
+
+ ata_stat = ap->ops->check_status(ap);
+ nv_swncq_irq_clear(ap, fis);
+ if (!fis)
+ return;
+
+ if (ap->pflags & ATA_PFLAG_FROZEN)
+ return;
+
+ if (fis & NV_SWNCQ_IRQ_HOTPLUG) {
+ nv_swncq_hotplug(ap, fis);
+ return;
+ }
+
+ if (!pp->qc_active)
+ return;
+
+ serror = ap->ops->scr_read(ap, SCR_ERROR);
+ ap->ops->scr_write(ap, SCR_ERROR, serror);
+
+ if (ata_stat & ATA_ERR) {
+ ata_ehi_clear_desc(ehi);
+ ata_ehi_push_desc(ehi, "Ata error. fis:0x%X", fis);
+ ehi->err_mask |= AC_ERR_DEV;
+ ehi->serror |= serror;
+ ehi->action |= ATA_EH_SOFTRESET;
+ ata_port_freeze(ap);
+ return;
+ }
+
+ spin_lock(&pp->lock);
+ if (fis & NV_SWNCQ_IRQ_BACKOUT) {
+ /* If the IRQ is backout, driver must issue
+ * the new command again some time later.
+ */
+ pp->ncq_saw_backout = 1;
+ }
+
+ if (fis & NV_SWNCQ_IRQ_SDBFIS) {
+ pp->ncq_saw_sdb = 1;
+ DPRINTK("id 0x%x SWNCQ: qc_active 0x%X "
+ "dhfis 0x%X dmafis 0x%X sactive 0x%X\n",
+ ap->print_id, pp->qc_active, pp->dhfis_bits,
+ pp->dmafis_bits, readl(pp->sactive_block));
+ rc = nv_swncq_sdbfis(ap);
+ if (rc < 0)
+ goto irq_error;
+ }
+
+ if (fis & NV_SWNCQ_IRQ_DHREGFIS) {
+ /* The interrupt indicates the new command
+ * was transmitted correctly to the drive.
+ */
+ pp->dhfis_bits |= (0x1 << pp->last_issue_tag);
+ pp->ncq_saw_d2h = 1;
+ if (pp->ncq_saw_sdb || pp->ncq_saw_backout) {
+ ata_ehi_push_desc(ehi, "illegal fis transaction");
+ ehi->err_mask |= AC_ERR_HSM;
+ ehi->action |= ATA_EH_HARDRESET;
+ goto irq_error;
+ }
+
+ if (!(fis & NV_SWNCQ_IRQ_DMASETUP) && !pp->ncq_saw_dmas) {
+ ata_stat = ap->ops->check_status(ap);
+ if (ata_stat & ATA_BUSY)
+ goto irq_exit;
+
+ if (pp->defer_queue.defer_bits) {
+ DPRINTK("send next command\n");
+ qc = nv_swncq_qc_from_dq(ap);
+ nv_swncq_issue_atacmd(ap, qc);
+ }
+ }
+ }
+
+ if (fis & NV_SWNCQ_IRQ_DMASETUP) {
+ /* program the dma controller with appropriate PRD buffers
+ * and start the DMA transfer for requested command.
+ */
+ pp->dmafis_bits |= (0x1 << nv_swncq_tag(ap));
+ pp->ncq_saw_dmas = 1;
+ rc = nv_swncq_dmafis(ap);
+ }
+
+irq_exit:
+ spin_unlock(&pp->lock);
+ return;
+irq_error:
+ ata_ehi_push_desc(ehi, "fis:0x%x", fis);
+ ata_port_freeze(ap);
+ spin_unlock(&pp->lock);
+ return;
+}
+
+static irqreturn_t nv_swncq_interrupt(int irq, void *dev_instance)
+{
+ struct ata_host *host = dev_instance;
+ unsigned int i;
+ unsigned int handled = 0;
+ unsigned long flags;
+ u32 irq_stat;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ irq_stat = readl(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_MCP55);
+
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+
+ if (ap && !(ap->flags & ATA_FLAG_DISABLED)) {
+ if (ap->sactive) {
+ nv_swncq_host_interrupt(ap, (u16)irq_stat);
+ handled = 1;
+ } else {
+ if (irq_stat) /* reserve Hotplug */
+ nv_swncq_irq_clear(ap, 0xfff0);
+
+ handled += nv_host_intr(ap, (u8)irq_stat);
+ }
+ }
+ irq_stat >>= NV_INT_PORT_SHIFT_MCP55;
+ }
+
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ return IRQ_RETVAL(handled);
+}
+
static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version = 0;
@@ -1553,7 +2388,7 @@ static int nv_init_one (struct pci_dev *
return rc;
/* determine type and allocate host */
- if (type >= CK804 && adma_enabled) {
+ if (type == CK804 && adma_enabled) {
dev_printk(KERN_NOTICE, &pdev->dev, "Using ADMA mode\n");
type = ADMA;
}
@@ -1599,6 +2434,9 @@ static int nv_init_one (struct pci_dev *
rc = nv_adma_host_init(host);
if (rc)
return rc;
+ } else if (type == SWNCQ && swncq_enabled) {
+ dev_printk(KERN_NOTICE, &pdev->dev, "Using SWNCQ mode\n");
+ nv_swncq_host_init(host);
}
pci_set_master(pdev);
@@ -1698,3 +2536,6 @@ module_init(nv_init);
module_exit(nv_exit);
module_param_named(adma, adma_enabled, bool, 0444);
MODULE_PARM_DESC(adma, "Enable use of ADMA (Default: true)");
+module_param_named(swncq, swncq_enabled, bool, 0444);
+MODULE_PARM_DESC(swncq, "Enable use of SWNCQ (Default: false)");
+
_
-
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