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sata_nv.c
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/*
* sata_nv.c - NVIDIA nForce SATA
*
* Copyright 2004 NVIDIA Corp. All rights reserved.
* Copyright 2004 Andrew Chew
*
*
* 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.*
*
* No hardware documentation available outside of NVIDIA.
* This driver programs the NVIDIA SATA controller in a similar
* fashion as with other PCI IDE BMDMA controllers, with a few
* NV-specific details such as register offsets, SATA phy location,
* hotplug info, etc.
*
* CK804/MCP04 controllers support an alternate programming interface
* similar to the ADMA specification (with some modifications).
* This allows the use of NCQ. Non-DMA-mapped ATA commands are still
* sent through the legacy interface.
*
*/
#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/device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <linux/libata.h>
#define DRV_NAME "sata_nv"
#define DRV_VERSION "3.5"
#define NV_ADMA_DMA_BOUNDARY 0xffffffffUL
enum {
NV_MMIO_BAR = 5,
NV_PORTS = 2,
NV_PIO_MASK = 0x1f,
NV_MWDMA_MASK = 0x07,
NV_UDMA_MASK = 0x7f,
NV_PORT0_SCR_REG_OFFSET = 0x00,
NV_PORT1_SCR_REG_OFFSET = 0x40,
/* INT_STATUS/ENABLE */
NV_INT_STATUS = 0x10,
NV_INT_ENABLE = 0x11,
NV_INT_STATUS_CK804 = 0x440,
NV_INT_ENABLE_CK804 = 0x441,
/* INT_STATUS/ENABLE bits */
NV_INT_DEV = 0x01,
NV_INT_PM = 0x02,
NV_INT_ADDED = 0x04,
NV_INT_REMOVED = 0x08,
NV_INT_PORT_SHIFT = 4, /* each port occupies 4 bits */
NV_INT_ALL = 0x0f,
NV_INT_MASK = NV_INT_DEV |
NV_INT_ADDED | NV_INT_REMOVED,
/* INT_CONFIG */
NV_INT_CONFIG = 0x12,
NV_INT_CONFIG_METHD = 0x01, // 0 = INT, 1 = SMI
// For PCI config register 20
NV_MCP_SATA_CFG_20 = 0x50,
NV_MCP_SATA_CFG_20_SATA_SPACE_EN = 0x04,
NV_MCP_SATA_CFG_20_PORT0_EN = (1 << 17),
NV_MCP_SATA_CFG_20_PORT1_EN = (1 << 16),
NV_MCP_SATA_CFG_20_PORT0_PWB_EN = (1 << 14),
NV_MCP_SATA_CFG_20_PORT1_PWB_EN = (1 << 12),
NV_ADMA_MAX_CPBS = 32,
NV_ADMA_CPB_SZ = 128,
NV_ADMA_APRD_SZ = 16,
NV_ADMA_SGTBL_LEN = (1024 - NV_ADMA_CPB_SZ) /
NV_ADMA_APRD_SZ,
NV_ADMA_SGTBL_TOTAL_LEN = NV_ADMA_SGTBL_LEN + 5,
NV_ADMA_SGTBL_SZ = NV_ADMA_SGTBL_LEN * NV_ADMA_APRD_SZ,
NV_ADMA_PORT_PRIV_DMA_SZ = NV_ADMA_MAX_CPBS *
(NV_ADMA_CPB_SZ + NV_ADMA_SGTBL_SZ),
/* BAR5 offset to ADMA general registers */
NV_ADMA_GEN = 0x400,
NV_ADMA_GEN_CTL = 0x00,
NV_ADMA_NOTIFIER_CLEAR = 0x30,
/* BAR5 offset to ADMA ports */
NV_ADMA_PORT = 0x480,
/* size of ADMA port register space */
NV_ADMA_PORT_SIZE = 0x100,
/* ADMA port registers */
NV_ADMA_CTL = 0x40,
NV_ADMA_CPB_COUNT = 0x42,
NV_ADMA_NEXT_CPB_IDX = 0x43,
NV_ADMA_STAT = 0x44,
NV_ADMA_CPB_BASE_LOW = 0x48,
NV_ADMA_CPB_BASE_HIGH = 0x4C,
NV_ADMA_APPEND = 0x50,
NV_ADMA_NOTIFIER = 0x68,
NV_ADMA_NOTIFIER_ERROR = 0x6C,
/* NV_ADMA_CTL register bits */
NV_ADMA_CTL_HOTPLUG_IEN = (1 << 0),
NV_ADMA_CTL_CHANNEL_RESET = (1 << 5),
NV_ADMA_CTL_GO = (1 << 7),
NV_ADMA_CTL_AIEN = (1 << 8),
NV_ADMA_CTL_READ_NON_COHERENT = (1 << 11),
NV_ADMA_CTL_WRITE_NON_COHERENT = (1 << 12),
/* CPB response flag bits */
NV_CPB_RESP_DONE = (1 << 0),
NV_CPB_RESP_ATA_ERR = (1 << 3),
NV_CPB_RESP_CMD_ERR = (1 << 4),
NV_CPB_RESP_CPB_ERR = (1 << 7),
/* CPB control flag bits */
NV_CPB_CTL_CPB_VALID = (1 << 0),
NV_CPB_CTL_QUEUE = (1 << 1),
NV_CPB_CTL_APRD_VALID = (1 << 2),
NV_CPB_CTL_IEN = (1 << 3),
NV_CPB_CTL_FPDMA = (1 << 4),
/* APRD flags */
NV_APRD_WRITE = (1 << 1),
NV_APRD_END = (1 << 2),
NV_APRD_CONT = (1 << 3),
/* NV_ADMA_STAT flags */
NV_ADMA_STAT_TIMEOUT = (1 << 0),
NV_ADMA_STAT_HOTUNPLUG = (1 << 1),
NV_ADMA_STAT_HOTPLUG = (1 << 2),
NV_ADMA_STAT_CPBERR = (1 << 4),
NV_ADMA_STAT_SERROR = (1 << 5),
NV_ADMA_STAT_CMD_COMPLETE = (1 << 6),
NV_ADMA_STAT_IDLE = (1 << 8),
NV_ADMA_STAT_LEGACY = (1 << 9),
NV_ADMA_STAT_STOPPED = (1 << 10),
NV_ADMA_STAT_DONE = (1 << 12),
NV_ADMA_STAT_ERR = NV_ADMA_STAT_CPBERR |
NV_ADMA_STAT_TIMEOUT,
/* port flags */
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 */
struct nv_adma_prd {
__le64 addr;
__le32 len;
u8 flags;
u8 packet_len;
__le16 reserved;
};
enum nv_adma_regbits {
CMDEND = (1 << 15), /* end of command list */
WNB = (1 << 14), /* wait-not-BSY */
IGN = (1 << 13), /* ignore this entry */
CS1n = (1 << (4 + 8)), /* std. PATA signals follow... */
DA2 = (1 << (2 + 8)),
DA1 = (1 << (1 + 8)),
DA0 = (1 << (0 + 8)),
};
/* ADMA Command Parameter Block
The first 5 SG segments are stored inside the Command Parameter Block itself.
If there are more than 5 segments the remainder are stored in a separate
memory area indicated by next_aprd. */
struct nv_adma_cpb {
u8 resp_flags; /* 0 */
u8 reserved1; /* 1 */
u8 ctl_flags; /* 2 */
/* len is length of taskfile in 64 bit words */
u8 len; /* 3 */
u8 tag; /* 4 */
u8 next_cpb_idx; /* 5 */
__le16 reserved2; /* 6-7 */
__le16 tf[12]; /* 8-31 */
struct nv_adma_prd aprd[5]; /* 32-111 */
__le64 next_aprd; /* 112-119 */
__le64 reserved3; /* 120-127 */
};
struct nv_adma_port_priv {
struct nv_adma_cpb *cpb;
dma_addr_t cpb_dma;
struct nv_adma_prd *aprd;
dma_addr_t aprd_dma;
void __iomem *ctl_block;
void __iomem *gen_block;
void __iomem *notifier_clear_block;
u64 adma_dma_mask;
u8 flags;
int last_issue_ncq;
};
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];
};
enum ncq_saw_flag_list {
ncq_saw_d2h = (1U << 0),
ncq_saw_dmas = (1U << 1),
ncq_saw_sdb = (1U << 2),
ncq_saw_backout = (1U << 3),
};
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;
/* 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_flags;
};
#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);
#ifdef CONFIG_PM
static int nv_pci_device_resume(struct pci_dev *pdev);
#endif
static void nv_ck804_host_stop(struct ata_host *host);
static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance);
static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance);
static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance);
static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
static void nv_nf2_freeze(struct ata_port *ap);
static void nv_nf2_thaw(struct ata_port *ap);
static void nv_ck804_freeze(struct ata_port *ap);
static void nv_ck804_thaw(struct ata_port *ap);
static int nv_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
static int nv_adma_slave_config(struct scsi_device *sdev);
static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc);
static void nv_adma_qc_prep(struct ata_queued_cmd *qc);
static unsigned int nv_adma_qc_issue(struct ata_queued_cmd *qc);
static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance);
static void nv_adma_irq_clear(struct ata_port *ap);
static int nv_adma_port_start(struct ata_port *ap);
static void nv_adma_port_stop(struct ata_port *ap);
#ifdef CONFIG_PM
static int nv_adma_port_suspend(struct ata_port *ap, pm_message_t mesg);
static int nv_adma_port_resume(struct ata_port *ap);
#endif
static void nv_adma_freeze(struct ata_port *ap);
static void nv_adma_thaw(struct ata_port *ap);
static void nv_adma_error_handler(struct ata_port *ap);
static void nv_adma_host_stop(struct ata_host *host);
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,
SWNCQ,
};
static const struct pci_device_id nv_pci_tbl[] = {
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA), NFORCE2 },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA), NFORCE3 },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2), NFORCE3 },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA), CK804 },
{ 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), 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), GENERIC },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2), GENERIC },
{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3), GENERIC },
{ } /* terminate list */
};
static struct pci_driver nv_pci_driver = {
.name = DRV_NAME,
.id_table = nv_pci_tbl,
.probe = nv_init_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.resume = nv_pci_device_resume,
#endif
.remove = ata_pci_remove_one,
};
static struct scsi_host_template nv_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
static struct scsi_host_template nv_adma_sht = {
ATA_NCQ_SHT(DRV_NAME),
.can_queue = NV_ADMA_MAX_CPBS,
.sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN,
.dma_boundary = NV_ADMA_DMA_BOUNDARY,
.slave_configure = nv_adma_slave_config,
};
static struct scsi_host_template nv_swncq_sht = {
ATA_NCQ_SHT(DRV_NAME),
.can_queue = ATA_MAX_QUEUE,
.sg_tablesize = LIBATA_MAX_PRD,
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = nv_swncq_slave_config,
};
static struct ata_port_operations nv_generic_ops = {
.inherits = &ata_bmdma_port_ops,
.hardreset = nv_hardreset,
.scr_read = nv_scr_read,
.scr_write = nv_scr_write,
};
static struct ata_port_operations nv_nf2_ops = {
.inherits = &nv_generic_ops,
.freeze = nv_nf2_freeze,
.thaw = nv_nf2_thaw,
};
static struct ata_port_operations nv_ck804_ops = {
.inherits = &nv_generic_ops,
.freeze = nv_ck804_freeze,
.thaw = nv_ck804_thaw,
.host_stop = nv_ck804_host_stop,
};
static struct ata_port_operations nv_adma_ops = {
.inherits = &nv_generic_ops,
.check_atapi_dma = nv_adma_check_atapi_dma,
.sff_tf_read = nv_adma_tf_read,
.qc_defer = ata_std_qc_defer,
.qc_prep = nv_adma_qc_prep,
.qc_issue = nv_adma_qc_issue,
.sff_irq_clear = nv_adma_irq_clear,
.freeze = nv_adma_freeze,
.thaw = nv_adma_thaw,
.error_handler = nv_adma_error_handler,
.post_internal_cmd = nv_adma_post_internal_cmd,
.port_start = nv_adma_port_start,
.port_stop = nv_adma_port_stop,
#ifdef CONFIG_PM
.port_suspend = nv_adma_port_suspend,
.port_resume = nv_adma_port_resume,
#endif
.host_stop = nv_adma_host_stop,
};
static struct ata_port_operations nv_swncq_ops = {
.inherits = &nv_generic_ops,
.qc_defer = ata_std_qc_defer,
.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,
#ifdef CONFIG_PM
.port_suspend = nv_swncq_port_suspend,
.port_resume = nv_swncq_port_resume,
#endif
.port_start = nv_swncq_port_start,
};
struct nv_pi_priv {
irq_handler_t irq_handler;
struct scsi_host_template *sht;
};
#define NV_PI_PRIV(_irq_handler, _sht) \
&(struct nv_pi_priv){ .irq_handler = _irq_handler, .sht = _sht }
static const struct ata_port_info nv_port_info[] = {
/* generic */
{
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_generic_ops,
.private_data = NV_PI_PRIV(nv_generic_interrupt, &nv_sht),
},
/* nforce2/3 */
{
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_nf2_ops,
.private_data = NV_PI_PRIV(nv_nf2_interrupt, &nv_sht),
},
/* ck804 */
{
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_ck804_ops,
.private_data = NV_PI_PRIV(nv_ck804_interrupt, &nv_sht),
},
/* ADMA */
{
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_NCQ,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_adma_ops,
.private_data = NV_PI_PRIV(nv_adma_interrupt, &nv_adma_sht),
},
/* SWNCQ */
{
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_NCQ,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_swncq_ops,
.private_data = NV_PI_PRIV(nv_swncq_interrupt, &nv_swncq_sht),
},
};
MODULE_AUTHOR("NVIDIA");
MODULE_DESCRIPTION("low-level driver for NVIDIA nForce SATA controller");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, nv_pci_tbl);
MODULE_VERSION(DRV_VERSION);
static int adma_enabled;
static int swncq_enabled = 1;
static void nv_adma_register_mode(struct ata_port *ap)
{
struct nv_adma_port_priv *pp = ap->private_data;
void __iomem *mmio = pp->ctl_block;
u16 tmp, status;
int count = 0;
if (pp->flags & NV_ADMA_PORT_REGISTER_MODE)
return;
status = readw(mmio + NV_ADMA_STAT);
while (!(status & NV_ADMA_STAT_IDLE) && count < 20) {
ndelay(50);
status = readw(mmio + NV_ADMA_STAT);
count++;
}
if (count == 20)
ata_port_printk(ap, KERN_WARNING,
"timeout waiting for ADMA IDLE, stat=0x%hx\n",
status);
tmp = readw(mmio + NV_ADMA_CTL);
writew(tmp & ~NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL);
count = 0;
status = readw(mmio + NV_ADMA_STAT);
while (!(status & NV_ADMA_STAT_LEGACY) && count < 20) {
ndelay(50);
status = readw(mmio + NV_ADMA_STAT);
count++;
}
if (count == 20)
ata_port_printk(ap, KERN_WARNING,
"timeout waiting for ADMA LEGACY, stat=0x%hx\n",
status);
pp->flags |= NV_ADMA_PORT_REGISTER_MODE;
}
static void nv_adma_mode(struct ata_port *ap)
{
struct nv_adma_port_priv *pp = ap->private_data;
void __iomem *mmio = pp->ctl_block;
u16 tmp, status;
int count = 0;
if (!(pp->flags & NV_ADMA_PORT_REGISTER_MODE))
return;
WARN_ON(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE);
tmp = readw(mmio + NV_ADMA_CTL);
writew(tmp | NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL);
status = readw(mmio + NV_ADMA_STAT);
while (((status & NV_ADMA_STAT_LEGACY) ||
!(status & NV_ADMA_STAT_IDLE)) && count < 20) {
ndelay(50);
status = readw(mmio + NV_ADMA_STAT);
count++;
}
if (count == 20)
ata_port_printk(ap, KERN_WARNING,
"timeout waiting for ADMA LEGACY clear and IDLE, stat=0x%hx\n",
status);
pp->flags &= ~NV_ADMA_PORT_REGISTER_MODE;
}
static int nv_adma_slave_config(struct scsi_device *sdev)
{
struct ata_port *ap = ata_shost_to_port(sdev->host);
struct nv_adma_port_priv *pp = ap->private_data;
struct nv_adma_port_priv *port0, *port1;
struct scsi_device *sdev0, *sdev1;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
unsigned long segment_boundary, flags;
unsigned short sg_tablesize;
int rc;
int adma_enable;
u32 current_reg, new_reg, config_mask;
rc = ata_scsi_slave_config(sdev);
if (sdev->id >= ATA_MAX_DEVICES || sdev->channel || sdev->lun)
/* Not a proper libata device, ignore */
return rc;
spin_lock_irqsave(ap->lock, flags);
if (ap->link.device[sdev->id].class == ATA_DEV_ATAPI) {
/*
* NVIDIA reports that ADMA mode does not support ATAPI commands.
* Therefore ATAPI commands are sent through the legacy interface.
* However, the legacy interface only supports 32-bit DMA.
* Restrict DMA parameters as required by the legacy interface
* when an ATAPI device is connected.
*/
segment_boundary = ATA_DMA_BOUNDARY;
/* Subtract 1 since an extra entry may be needed for padding, see
libata-scsi.c */
sg_tablesize = LIBATA_MAX_PRD - 1;
/* Since the legacy DMA engine is in use, we need to disable ADMA
on the port. */
adma_enable = 0;
nv_adma_register_mode(ap);
} else {
segment_boundary = NV_ADMA_DMA_BOUNDARY;
sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN;
adma_enable = 1;
}
pci_read_config_dword(pdev, NV_MCP_SATA_CFG_20, ¤t_reg);
if (ap->port_no == 1)
config_mask = NV_MCP_SATA_CFG_20_PORT1_EN |
NV_MCP_SATA_CFG_20_PORT1_PWB_EN;
else
config_mask = NV_MCP_SATA_CFG_20_PORT0_EN |
NV_MCP_SATA_CFG_20_PORT0_PWB_EN;
if (adma_enable) {
new_reg = current_reg | config_mask;
pp->flags &= ~NV_ADMA_ATAPI_SETUP_COMPLETE;
} else {
new_reg = current_reg & ~config_mask;
pp->flags |= NV_ADMA_ATAPI_SETUP_COMPLETE;
}
if (current_reg != new_reg)
pci_write_config_dword(pdev, NV_MCP_SATA_CFG_20, new_reg);
port0 = ap->host->ports[0]->private_data;
port1 = ap->host->ports[1]->private_data;
sdev0 = ap->host->ports[0]->link.device[0].sdev;
sdev1 = ap->host->ports[1]->link.device[0].sdev;
if ((port0->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) ||
(port1->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)) {
/** We have to set the DMA mask to 32-bit if either port is in
ATAPI mode, since they are on the same PCI device which is
used for DMA mapping. If we set the mask we also need to set
the bounce limit on both ports to ensure that the block
layer doesn't feed addresses that cause DMA mapping to
choke. If either SCSI device is not allocated yet, it's OK
since that port will discover its correct setting when it
does get allocated.
Note: Setting 32-bit mask should not fail. */
if (sdev0)
blk_queue_bounce_limit(sdev0->request_queue,
ATA_DMA_MASK);
if (sdev1)
blk_queue_bounce_limit(sdev1->request_queue,
ATA_DMA_MASK);
pci_set_dma_mask(pdev, ATA_DMA_MASK);
} else {
/** This shouldn't fail as it was set to this value before */
pci_set_dma_mask(pdev, pp->adma_dma_mask);
if (sdev0)
blk_queue_bounce_limit(sdev0->request_queue,
pp->adma_dma_mask);
if (sdev1)
blk_queue_bounce_limit(sdev1->request_queue,
pp->adma_dma_mask);
}
blk_queue_segment_boundary(sdev->request_queue, segment_boundary);
blk_queue_max_hw_segments(sdev->request_queue, sg_tablesize);
ata_port_printk(ap, KERN_INFO,
"DMA mask 0x%llX, segment boundary 0x%lX, hw segs %hu\n",
(unsigned long long)*ap->host->dev->dma_mask,
segment_boundary, sg_tablesize);
spin_unlock_irqrestore(ap->lock, flags);
return rc;
}
static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc)
{
struct nv_adma_port_priv *pp = qc->ap->private_data;
return !(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE);
}
static void nv_adma_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
{
/* Other than when internal or pass-through commands are executed,
the only time this function will be called in ADMA mode will be
if a command fails. In the failure case we don't care about going
into register mode with ADMA commands pending, as the commands will
all shortly be aborted anyway. We assume that NCQ commands are not
issued via passthrough, which is the only way that switching into
ADMA mode could abort outstanding commands. */
nv_adma_register_mode(ap);
ata_sff_tf_read(ap, tf);
}
static unsigned int nv_adma_tf_to_cpb(struct ata_taskfile *tf, __le16 *cpb)
{
unsigned int idx = 0;
if (tf->flags & ATA_TFLAG_ISADDR) {
if (tf->flags & ATA_TFLAG_LBA48) {
cpb[idx++] = cpu_to_le16((ATA_REG_ERR << 8) | tf->hob_feature | WNB);
cpb[idx++] = cpu_to_le16((ATA_REG_NSECT << 8) | tf->hob_nsect);
cpb[idx++] = cpu_to_le16((ATA_REG_LBAL << 8) | tf->hob_lbal);
cpb[idx++] = cpu_to_le16((ATA_REG_LBAM << 8) | tf->hob_lbam);
cpb[idx++] = cpu_to_le16((ATA_REG_LBAH << 8) | tf->hob_lbah);
cpb[idx++] = cpu_to_le16((ATA_REG_ERR << 8) | tf->feature);
} else
cpb[idx++] = cpu_to_le16((ATA_REG_ERR << 8) | tf->feature | WNB);
cpb[idx++] = cpu_to_le16((ATA_REG_NSECT << 8) | tf->nsect);
cpb[idx++] = cpu_to_le16((ATA_REG_LBAL << 8) | tf->lbal);
cpb[idx++] = cpu_to_le16((ATA_REG_LBAM << 8) | tf->lbam);
cpb[idx++] = cpu_to_le16((ATA_REG_LBAH << 8) | tf->lbah);
}
if (tf->flags & ATA_TFLAG_DEVICE)
cpb[idx++] = cpu_to_le16((ATA_REG_DEVICE << 8) | tf->device);
cpb[idx++] = cpu_to_le16((ATA_REG_CMD << 8) | tf->command | CMDEND);
while (idx < 12)
cpb[idx++] = cpu_to_le16(IGN);
return idx;
}
static int nv_adma_check_cpb(struct ata_port *ap, int cpb_num, int force_err)
{
struct nv_adma_port_priv *pp = ap->private_data;
u8 flags = pp->cpb[cpb_num].resp_flags;
VPRINTK("CPB %d, flags=0x%x\n", cpb_num, flags);
if (unlikely((force_err ||
flags & (NV_CPB_RESP_ATA_ERR |
NV_CPB_RESP_CMD_ERR |
NV_CPB_RESP_CPB_ERR)))) {
struct ata_eh_info *ehi = &ap->link.eh_info;
int freeze = 0;
ata_ehi_clear_desc(ehi);
__ata_ehi_push_desc(ehi, "CPB resp_flags 0x%x: ", flags);
if (flags & NV_CPB_RESP_ATA_ERR) {
ata_ehi_push_desc(ehi, "ATA error");
ehi->err_mask |= AC_ERR_DEV;
} else if (flags & NV_CPB_RESP_CMD_ERR) {
ata_ehi_push_desc(ehi, "CMD error");
ehi->err_mask |= AC_ERR_DEV;
} else if (flags & NV_CPB_RESP_CPB_ERR) {
ata_ehi_push_desc(ehi, "CPB error");
ehi->err_mask |= AC_ERR_SYSTEM;
freeze = 1;
} else {
/* notifier error, but no error in CPB flags? */
ata_ehi_push_desc(ehi, "unknown");
ehi->err_mask |= AC_ERR_OTHER;
freeze = 1;
}
/* Kill all commands. EH will determine what actually failed. */
if (freeze)
ata_port_freeze(ap);
else
ata_port_abort(ap);
return 1;
}
if (likely(flags & NV_CPB_RESP_DONE)) {
struct ata_queued_cmd *qc = ata_qc_from_tag(ap, cpb_num);
VPRINTK("CPB flags done, flags=0x%x\n", flags);
if (likely(qc)) {
DPRINTK("Completing qc from tag %d\n", cpb_num);
ata_qc_complete(qc);
} else {
struct ata_eh_info *ehi = &ap->link.eh_info;
/* Notifier bits set without a command may indicate the drive
is misbehaving. Raise host state machine violation on this
condition. */
ata_port_printk(ap, KERN_ERR,
"notifier for tag %d with no cmd?\n",
cpb_num);
ehi->err_mask |= AC_ERR_HSM;
ehi->action |= ATA_EH_RESET;
ata_port_freeze(ap);
return 1;
}
}
return 0;
}
static int nv_host_intr(struct ata_port *ap, u8 irq_stat)
{
struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
/* freeze if hotplugged */
if (unlikely(irq_stat & (NV_INT_ADDED | NV_INT_REMOVED))) {
ata_port_freeze(ap);
return 1;
}
/* bail out if not our interrupt */
if (!(irq_stat & NV_INT_DEV))
return 0;
/* DEV interrupt w/ no active qc? */
if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
ata_sff_check_status(ap);
return 1;
}
/* handle interrupt */
return ata_sff_host_intr(ap, qc);
}
static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
int i, handled = 0;
u32 notifier_clears[2];
spin_lock(&host->lock);
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
notifier_clears[i] = 0;
if (ap && !(ap->flags & ATA_FLAG_DISABLED)) {
struct nv_adma_port_priv *pp = ap->private_data;
void __iomem *mmio = pp->ctl_block;
u16 status;
u32 gen_ctl;
u32 notifier, notifier_error;
/* if ADMA is disabled, use standard ata interrupt handler */
if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) {
u8 irq_stat = readb(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804)
>> (NV_INT_PORT_SHIFT * i);
handled += nv_host_intr(ap, irq_stat);
continue;
}
/* if in ATA register mode, check for standard interrupts */
if (pp->flags & NV_ADMA_PORT_REGISTER_MODE) {
u8 irq_stat = readb(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804)
>> (NV_INT_PORT_SHIFT * i);
if (ata_tag_valid(ap->link.active_tag))
/** NV_INT_DEV indication seems unreliable at times
at least in ADMA mode. Force it on always when a
command is active, to prevent losing interrupts. */
irq_stat |= NV_INT_DEV;
handled += nv_host_intr(ap, irq_stat);
}
notifier = readl(mmio + NV_ADMA_NOTIFIER);
notifier_error = readl(mmio + NV_ADMA_NOTIFIER_ERROR);
notifier_clears[i] = notifier | notifier_error;
gen_ctl = readl(pp->gen_block + NV_ADMA_GEN_CTL);
if (!NV_ADMA_CHECK_INTR(gen_ctl, ap->port_no) && !notifier &&
!notifier_error)
/* Nothing to do */
continue;
status = readw(mmio + NV_ADMA_STAT);
/* Clear status. Ensure the controller sees the clearing before we start
looking at any of the CPB statuses, so that any CPB completions after
this point in the handler will raise another interrupt. */
writew(status, mmio + NV_ADMA_STAT);
readw(mmio + NV_ADMA_STAT); /* flush posted write */
rmb();
handled++; /* irq handled if we got here */
/* freeze if hotplugged or controller error */
if (unlikely(status & (NV_ADMA_STAT_HOTPLUG |
NV_ADMA_STAT_HOTUNPLUG |
NV_ADMA_STAT_TIMEOUT |
NV_ADMA_STAT_SERROR))) {
struct ata_eh_info *ehi = &ap->link.eh_info;
ata_ehi_clear_desc(ehi);
__ata_ehi_push_desc(ehi, "ADMA status 0x%08x: ", status);
if (status & NV_ADMA_STAT_TIMEOUT) {
ehi->err_mask |= AC_ERR_SYSTEM;
ata_ehi_push_desc(ehi, "timeout");
} else if (status & NV_ADMA_STAT_HOTPLUG) {
ata_ehi_hotplugged(ehi);
ata_ehi_push_desc(ehi, "hotplug");
} else if (status & NV_ADMA_STAT_HOTUNPLUG) {
ata_ehi_hotplugged(ehi);
ata_ehi_push_desc(ehi, "hot unplug");
} else if (status & NV_ADMA_STAT_SERROR) {
/* let libata analyze SError and figure out the cause */
ata_ehi_push_desc(ehi, "SError");
} else
ata_ehi_push_desc(ehi, "unknown");
ata_port_freeze(ap);
continue;
}
if (status & (NV_ADMA_STAT_DONE |
NV_ADMA_STAT_CPBERR |
NV_ADMA_STAT_CMD_COMPLETE)) {
u32 check_commands = notifier_clears[i];
int pos, error = 0;
if (status & NV_ADMA_STAT_CPBERR) {
/* Check all active commands */
if (ata_tag_valid(ap->link.active_tag))
check_commands = 1 <<
ap->link.active_tag;
else
check_commands = ap->
link.sactive;
}
/** Check CPBs for completed commands */
while ((pos = ffs(check_commands)) && !error) {
pos--;
error = nv_adma_check_cpb(ap, pos,
notifier_error & (1 << pos));
check_commands &= ~(1 << pos);
}
}
}
}
if (notifier_clears[0] || notifier_clears[1]) {
/* Note: Both notifier clear registers must be written
if either is set, even if one is zero, according to NVIDIA. */
struct nv_adma_port_priv *pp = host->ports[0]->private_data;
writel(notifier_clears[0], pp->notifier_clear_block);
pp = host->ports[1]->private_data;
writel(notifier_clears[1], pp->notifier_clear_block);
}
spin_unlock(&host->lock);
return IRQ_RETVAL(handled);
}
static void nv_adma_freeze(struct ata_port *ap)
{
struct nv_adma_port_priv *pp = ap->private_data;
void __iomem *mmio = pp->ctl_block;
u16 tmp;
nv_ck804_freeze(ap);
if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)
return;
/* clear any outstanding CK804 notifications */
writeb(NV_INT_ALL << (ap->port_no * NV_INT_PORT_SHIFT),
ap->host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804);
/* Disable interrupt */
tmp = readw(mmio + NV_ADMA_CTL);