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linux-next/drivers/ata/ahci.h
Dan Williams c312ef1763 libata/ahci: Drop PCS quirk for Denverton and beyond 
The Linux ahci driver has historically implemented a configuration fixup
for platforms / platform-firmware that fails to enable the ports prior
to OS hand-off at boot. The fixup was originally implemented way back
before ahci moved from drivers/scsi/ to drivers/ata/, and was updated in
2007 via commit 49f2909039 "ahci: update PCS programming". The quirk
sets a port-enable bitmap in the PCS register at offset 0x92.

This quirk could be applied generically up until the arrival of the
Denverton (DNV) platform. The DNV AHCI controller architecture supports
more than 6 ports and along with that the PCS register location and
format were updated to allow for more possible ports in the bitmap. DNV
AHCI expands the register to 32-bits and moves it to offset 0x94.

As it stands there are no known problem reports with existing Linux
trying to set bits at offset 0x92 which indicates that the quirk is not
applicable. Likely it is not applicable on a wider range of platforms,
but it is difficult to discern which platforms if any still depend on
the quirk.

Rather than try to fix the PCS quirk to consider the DNV register layout
instead require explicit opt-in. The assumption is that the OS driver
need not touch this register, and platforms can be added with a new
boad_ahci_pcs7 board-id when / if problematic platforms are found in the
future. The logic in ahci_intel_pcs_quirk() looks for all Intel AHCI
instances with "legacy" board-ids and otherwise skips the quirk if the
board was matched by class-code.

Reported-by: Stephen Douthit <stephend@silicom-usa.com>
Cc: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Stephen Douthit <stephend@silicom-usa.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-08-30 20:53:42 -06:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* ahci.h - Common AHCI SATA definitions and declarations
*
* Maintained by: Tejun Heo <tj@kernel.org>
* Please ALWAYS copy linux-ide@vger.kernel.org
* on emails.
*
* Copyright 2004-2005 Red Hat, Inc.
*
* libata documentation is available via 'make {ps|pdf}docs',
* as Documentation/driver-api/libata.rst
*
* AHCI hardware documentation:
* http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
* http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
*/
#ifndef _AHCI_H
#define _AHCI_H
#include <linux/pci.h>
#include <linux/clk.h>
#include <linux/libata.h>
#include <linux/phy/phy.h>
#include <linux/regulator/consumer.h>
/* Enclosure Management Control */
#define EM_CTRL_MSG_TYPE 0x000f0000
/* Enclosure Management LED Message Type */
#define EM_MSG_LED_HBA_PORT 0x0000000f
#define EM_MSG_LED_PMP_SLOT 0x0000ff00
#define EM_MSG_LED_VALUE 0xffff0000
#define EM_MSG_LED_VALUE_ACTIVITY 0x00070000
#define EM_MSG_LED_VALUE_OFF 0xfff80000
#define EM_MSG_LED_VALUE_ON 0x00010000
enum {
AHCI_MAX_PORTS = 32,
AHCI_MAX_CLKS = 5,
AHCI_MAX_SG = 168, /* hardware max is 64K */
AHCI_DMA_BOUNDARY = 0xffffffff,
AHCI_MAX_CMDS = 32,
AHCI_CMD_SZ = 32,
AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
AHCI_RX_FIS_SZ = 256,
AHCI_CMD_TBL_CDB = 0x40,
AHCI_CMD_TBL_HDR_SZ = 0x80,
AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
AHCI_RX_FIS_SZ,
AHCI_PORT_PRIV_FBS_DMA_SZ = AHCI_CMD_SLOT_SZ +
AHCI_CMD_TBL_AR_SZ +
(AHCI_RX_FIS_SZ * 16),
AHCI_IRQ_ON_SG = (1 << 31),
AHCI_CMD_ATAPI = (1 << 5),
AHCI_CMD_WRITE = (1 << 6),
AHCI_CMD_PREFETCH = (1 << 7),
AHCI_CMD_RESET = (1 << 8),
AHCI_CMD_CLR_BUSY = (1 << 10),
RX_FIS_PIO_SETUP = 0x20, /* offset of PIO Setup FIS data */
RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
/* global controller registers */
HOST_CAP = 0x00, /* host capabilities */
HOST_CTL = 0x04, /* global host control */
HOST_IRQ_STAT = 0x08, /* interrupt status */
HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
HOST_EM_LOC = 0x1c, /* Enclosure Management location */
HOST_EM_CTL = 0x20, /* Enclosure Management Control */
HOST_CAP2 = 0x24, /* host capabilities, extended */
/* HOST_CTL bits */
HOST_RESET = (1 << 0), /* reset controller; self-clear */
HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
HOST_MRSM = (1 << 2), /* MSI Revert to Single Message */
HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
/* HOST_CAP bits */
HOST_CAP_SXS = (1 << 5), /* Supports External SATA */
HOST_CAP_EMS = (1 << 6), /* Enclosure Management support */
HOST_CAP_CCC = (1 << 7), /* Command Completion Coalescing */
HOST_CAP_PART = (1 << 13), /* Partial state capable */
HOST_CAP_SSC = (1 << 14), /* Slumber state capable */
HOST_CAP_PIO_MULTI = (1 << 15), /* PIO multiple DRQ support */
HOST_CAP_FBS = (1 << 16), /* FIS-based switching support */
HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
HOST_CAP_ONLY = (1 << 18), /* Supports AHCI mode only */
HOST_CAP_CLO = (1 << 24), /* Command List Override support */
HOST_CAP_LED = (1 << 25), /* Supports activity LED */
HOST_CAP_ALPM = (1 << 26), /* Aggressive Link PM support */
HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
HOST_CAP_MPS = (1 << 28), /* Mechanical presence switch */
HOST_CAP_SNTF = (1 << 29), /* SNotification register */
HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
/* HOST_CAP2 bits */
HOST_CAP2_BOH = (1 << 0), /* BIOS/OS handoff supported */
HOST_CAP2_NVMHCI = (1 << 1), /* NVMHCI supported */
HOST_CAP2_APST = (1 << 2), /* Automatic partial to slumber */
HOST_CAP2_SDS = (1 << 3), /* Support device sleep */
HOST_CAP2_SADM = (1 << 4), /* Support aggressive DevSlp */
HOST_CAP2_DESO = (1 << 5), /* DevSlp from slumber only */
/* registers for each SATA port */
PORT_LST_ADDR = 0x00, /* command list DMA addr */
PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
PORT_IRQ_STAT = 0x10, /* interrupt status */
PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
PORT_CMD = 0x18, /* port command */
PORT_TFDATA = 0x20, /* taskfile data */
PORT_SIG = 0x24, /* device TF signature */
PORT_CMD_ISSUE = 0x38, /* command issue */
PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
PORT_FBS = 0x40, /* FIS-based Switching */
PORT_DEVSLP = 0x44, /* device sleep */
/* PORT_IRQ_{STAT,MASK} bits */
PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
PORT_IRQ_IF_ERR |
PORT_IRQ_CONNECT |
PORT_IRQ_PHYRDY |
PORT_IRQ_UNK_FIS |
PORT_IRQ_BAD_PMP,
PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
PORT_IRQ_TF_ERR |
PORT_IRQ_HBUS_DATA_ERR,
DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
/* PORT_CMD bits */
PORT_CMD_ASP = (1 << 27), /* Aggressive Slumber/Partial */
PORT_CMD_ALPE = (1 << 26), /* Aggressive Link PM enable */
PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
PORT_CMD_FBSCP = (1 << 22), /* FBS Capable Port */
PORT_CMD_ESP = (1 << 21), /* External Sata Port */
PORT_CMD_HPCP = (1 << 18), /* HotPlug Capable Port */
PORT_CMD_PMP = (1 << 17), /* PMP attached */
PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
PORT_CMD_CLO = (1 << 3), /* Command list override */
PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
/* PORT_FBS bits */
PORT_FBS_DWE_OFFSET = 16, /* FBS device with error offset */
PORT_FBS_ADO_OFFSET = 12, /* FBS active dev optimization offset */
PORT_FBS_DEV_OFFSET = 8, /* FBS device to issue offset */
PORT_FBS_DEV_MASK = (0xf << PORT_FBS_DEV_OFFSET), /* FBS.DEV */
PORT_FBS_SDE = (1 << 2), /* FBS single device error */
PORT_FBS_DEC = (1 << 1), /* FBS device error clear */
PORT_FBS_EN = (1 << 0), /* Enable FBS */
/* PORT_DEVSLP bits */
PORT_DEVSLP_DM_OFFSET = 25, /* DITO multiplier offset */
PORT_DEVSLP_DM_MASK = (0xf << 25), /* DITO multiplier mask */
PORT_DEVSLP_DITO_OFFSET = 15, /* DITO offset */
PORT_DEVSLP_MDAT_OFFSET = 10, /* Minimum assertion time */
PORT_DEVSLP_DETO_OFFSET = 2, /* DevSlp exit timeout */
PORT_DEVSLP_DSP = (1 << 1), /* DevSlp present */
PORT_DEVSLP_ADSE = (1 << 0), /* Aggressive DevSlp enable */
/* hpriv->flags bits */
#define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
AHCI_HFLAG_NO_NCQ = (1 << 0),
AHCI_HFLAG_IGN_IRQ_IF_ERR = (1 << 1), /* ignore IRQ_IF_ERR */
AHCI_HFLAG_IGN_SERR_INTERNAL = (1 << 2), /* ignore SERR_INTERNAL */
AHCI_HFLAG_32BIT_ONLY = (1 << 3), /* force 32bit */
AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
AHCI_HFLAG_SECT255 = (1 << 8), /* max 255 sectors */
AHCI_HFLAG_YES_NCQ = (1 << 9), /* force NCQ cap on */
AHCI_HFLAG_NO_SUSPEND = (1 << 10), /* don't suspend */
AHCI_HFLAG_SRST_TOUT_IS_OFFLINE = (1 << 11), /* treat SRST timeout as
link offline */
AHCI_HFLAG_NO_SNTF = (1 << 12), /* no sntf */
AHCI_HFLAG_NO_FPDMA_AA = (1 << 13), /* no FPDMA AA */
AHCI_HFLAG_YES_FBS = (1 << 14), /* force FBS cap on */
AHCI_HFLAG_DELAY_ENGINE = (1 << 15), /* do not start engine on
port start (wait until
error-handling stage) */
AHCI_HFLAG_NO_DEVSLP = (1 << 17), /* no device sleep */
AHCI_HFLAG_NO_FBS = (1 << 18), /* no FBS */
#ifdef CONFIG_PCI_MSI
AHCI_HFLAG_MULTI_MSI = (1 << 20), /* per-port MSI(-X) */
#else
/* compile out MSI infrastructure */
AHCI_HFLAG_MULTI_MSI = 0,
#endif
AHCI_HFLAG_WAKE_BEFORE_STOP = (1 << 22), /* wake before DMA stop */
AHCI_HFLAG_YES_ALPM = (1 << 23), /* force ALPM cap on */
AHCI_HFLAG_NO_WRITE_TO_RO = (1 << 24), /* don't write to read
only registers */
AHCI_HFLAG_IS_MOBILE = (1 << 25), /* mobile chipset, use
SATA_MOBILE_LPM_POLICY
as default lpm_policy */
AHCI_HFLAG_SUSPEND_PHYS = (1 << 26), /* handle PHYs during
suspend/resume */
/* ap->flags bits */
AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
ATA_FLAG_ACPI_SATA | ATA_FLAG_AN,
ICH_MAP = 0x90, /* ICH MAP register */
PCS_6 = 0x92, /* 6 port PCS */
PCS_7 = 0x94, /* 7+ port PCS (Denverton) */
/* em constants */
EM_MAX_SLOTS = 8,
EM_MAX_RETRY = 5,
/* em_ctl bits */
EM_CTL_RST = (1 << 9), /* Reset */
EM_CTL_TM = (1 << 8), /* Transmit Message */
EM_CTL_MR = (1 << 0), /* Message Received */
EM_CTL_ALHD = (1 << 26), /* Activity LED */
EM_CTL_XMT = (1 << 25), /* Transmit Only */
EM_CTL_SMB = (1 << 24), /* Single Message Buffer */
EM_CTL_SGPIO = (1 << 19), /* SGPIO messages supported */
EM_CTL_SES = (1 << 18), /* SES-2 messages supported */
EM_CTL_SAFTE = (1 << 17), /* SAF-TE messages supported */
EM_CTL_LED = (1 << 16), /* LED messages supported */
/* em message type */
EM_MSG_TYPE_LED = (1 << 0), /* LED */
EM_MSG_TYPE_SAFTE = (1 << 1), /* SAF-TE */
EM_MSG_TYPE_SES2 = (1 << 2), /* SES-2 */
EM_MSG_TYPE_SGPIO = (1 << 3), /* SGPIO */
};
struct ahci_cmd_hdr {
__le32 opts;
__le32 status;
__le32 tbl_addr;
__le32 tbl_addr_hi;
__le32 reserved[4];
};
struct ahci_sg {
__le32 addr;
__le32 addr_hi;
__le32 reserved;
__le32 flags_size;
};
struct ahci_em_priv {
enum sw_activity blink_policy;
struct timer_list timer;
unsigned long saved_activity;
unsigned long activity;
unsigned long led_state;
struct ata_link *link;
};
struct ahci_port_priv {
struct ata_link *active_link;
struct ahci_cmd_hdr *cmd_slot;
dma_addr_t cmd_slot_dma;
void *cmd_tbl;
dma_addr_t cmd_tbl_dma;
void *rx_fis;
dma_addr_t rx_fis_dma;
/* for NCQ spurious interrupt analysis */
unsigned int ncq_saw_d2h:1;
unsigned int ncq_saw_dmas:1;
unsigned int ncq_saw_sdb:1;
spinlock_t lock; /* protects parent ata_port */
u32 intr_mask; /* interrupts to enable */
bool fbs_supported; /* set iff FBS is supported */
bool fbs_enabled; /* set iff FBS is enabled */
int fbs_last_dev; /* save FBS.DEV of last FIS */
/* enclosure management info per PM slot */
struct ahci_em_priv em_priv[EM_MAX_SLOTS];
char *irq_desc; /* desc in /proc/interrupts */
};
struct ahci_host_priv {
/* Input fields */
unsigned int flags; /* AHCI_HFLAG_* */
u32 force_port_map; /* force port map */
u32 mask_port_map; /* mask out particular bits */
void __iomem * mmio; /* bus-independent mem map */
u32 cap; /* cap to use */
u32 cap2; /* cap2 to use */
u32 version; /* cached version */
u32 port_map; /* port map to use */
u32 saved_cap; /* saved initial cap */
u32 saved_cap2; /* saved initial cap2 */
u32 saved_port_map; /* saved initial port_map */
u32 em_loc; /* enclosure management location */
u32 em_buf_sz; /* EM buffer size in byte */
u32 em_msg_type; /* EM message type */
bool got_runtime_pm; /* Did we do pm_runtime_get? */
struct clk *clks[AHCI_MAX_CLKS]; /* Optional */
struct reset_control *rsts; /* Optional */
struct regulator **target_pwrs; /* Optional */
struct regulator *ahci_regulator;/* Optional */
struct regulator *phy_regulator;/* Optional */
/*
* If platform uses PHYs. There is a 1:1 relation between the port number and
* the PHY position in this array.
*/
struct phy **phys;
unsigned nports; /* Number of ports */
void *plat_data; /* Other platform data */
unsigned int irq; /* interrupt line */
/*
* Optional ahci_start_engine override, if not set this gets set to the
* default ahci_start_engine during ahci_save_initial_config, this can
* be overridden anytime before the host is activated.
*/
void (*start_engine)(struct ata_port *ap);
/*
* Optional ahci_stop_engine override, if not set this gets set to the
* default ahci_stop_engine during ahci_save_initial_config, this can
* be overridden anytime before the host is activated.
*/
int (*stop_engine)(struct ata_port *ap);
irqreturn_t (*irq_handler)(int irq, void *dev_instance);
/* only required for per-port MSI(-X) support */
int (*get_irq_vector)(struct ata_host *host,
int port);
};
extern int ahci_ignore_sss;
extern struct device_attribute *ahci_shost_attrs[];
extern struct device_attribute *ahci_sdev_attrs[];
/*
* This must be instantiated by the edge drivers. Read the comments
* for ATA_BASE_SHT
*/
#define AHCI_SHT(drv_name) \
ATA_NCQ_SHT(drv_name), \
.can_queue = AHCI_MAX_CMDS, \
.sg_tablesize = AHCI_MAX_SG, \
.dma_boundary = AHCI_DMA_BOUNDARY, \
.shost_attrs = ahci_shost_attrs, \
.sdev_attrs = ahci_sdev_attrs
extern struct ata_port_operations ahci_ops;
extern struct ata_port_operations ahci_platform_ops;
extern struct ata_port_operations ahci_pmp_retry_srst_ops;
unsigned int ahci_dev_classify(struct ata_port *ap);
void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
u32 opts);
void ahci_save_initial_config(struct device *dev,
struct ahci_host_priv *hpriv);
void ahci_init_controller(struct ata_host *host);
int ahci_reset_controller(struct ata_host *host);
int ahci_do_softreset(struct ata_link *link, unsigned int *class,
int pmp, unsigned long deadline,
int (*check_ready)(struct ata_link *link));
int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline, bool *online);
unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
int ahci_stop_engine(struct ata_port *ap);
void ahci_start_fis_rx(struct ata_port *ap);
void ahci_start_engine(struct ata_port *ap);
int ahci_check_ready(struct ata_link *link);
int ahci_kick_engine(struct ata_port *ap);
int ahci_port_resume(struct ata_port *ap);
void ahci_set_em_messages(struct ahci_host_priv *hpriv,
struct ata_port_info *pi);
int ahci_reset_em(struct ata_host *host);
void ahci_print_info(struct ata_host *host, const char *scc_s);
int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht);
void ahci_error_handler(struct ata_port *ap);
u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked);
static inline void __iomem *__ahci_port_base(struct ata_host *host,
unsigned int port_no)
{
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = hpriv->mmio;
return mmio + 0x100 + (port_no * 0x80);
}
static inline void __iomem *ahci_port_base(struct ata_port *ap)
{
return __ahci_port_base(ap->host, ap->port_no);
}
static inline int ahci_nr_ports(u32 cap)
{
return (cap & 0x1f) + 1;
}
#endif /* _AHCI_H */
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