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Message-Id: <201102111433.41507.bzolnier@gmail.com>
Date: Fri, 11 Feb 2011 14:33:40 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Sergei Shtylyov <sshtylyov@...sta.com>,
Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: [PATCH v2] ata: add CONFIG_SATA_HOST config option
Add CONFIG_SATA_HOST config option (for selecting SATA Host
support) to make setup easier on PATA-only systems.
Additionally move SATA-specific code to libata-sata.c which
allows us to save ~11.5k of the output code size (x86-64) on
PATA-only systems for CONFIG_SATA_HOST=n:
CONFIG_SATA_HOST=y:
text data bss dec hex filename
44283 6576 57 50916 c6e4 drivers/ata/libata-core.o
29054 16 2 29072 7190 drivers/ata/libata-eh.o
20085 0 19 20104 4e88 drivers/ata/libata-sff.o
8699 0 0 8699 21fb drivers/ata/libata-sata.o
CONFIG_SATA_HOST=n:
text data bss dec hex filename
43754 6576 57 50387 c4d3 drivers/ata/libata-core.o
26775 16 2 26793 68a9 drivers/ata/libata-eh.o
20144 0 19 20163 4ec3 drivers/ata/libata-sff.o
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
v2:
- Kconfig fixups per Sergei's comments
- add non-SATA version of ata_std_postreset()
- drop non-SATA versions of sata_link_[debounce,hardreset,resume](),
sata_set_spd(), sata_print_link_status() and ata_tf_from_fis()
- move SATA-specific code to libata-sata.c
drivers/ata/Kconfig | 23
drivers/ata/Makefile | 1
drivers/ata/libata-core.c | 814 ------------------------------
drivers/ata/libata-eh.c | 411 ---------------
drivers/ata/libata-sata.c | 1242 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/ata/libata-sff.c | 32 -
drivers/ata/libata.h | 52 +
include/linux/libata.h | 32 -
8 files changed, 1366 insertions(+), 1241 deletions(-)
Index: b/drivers/ata/Kconfig
===================================================================
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -50,13 +50,22 @@ config ATA_ACPI
You can disable this at kernel boot time by using the
option libata.noacpi=1
+config SATA_HOST
+ bool "SATA Host support"
+ default y
+ help
+ This option adds support for SATA Hosts.
+
config SATA_PMP
bool "SATA Port Multiplier support"
+ depends on SATA_HOST
default y
help
This option adds support for SATA Port Multipliers
(the SATA version of an ethernet hub, or SAS expander).
+if SATA_HOST
+
comment "Controllers with non-SFF native interface"
config SATA_AHCI
@@ -98,6 +107,8 @@ config SATA_SIL24
If unsure, say N.
+endif # SATA_HOST
+
config ATA_SFF
bool "ATA SFF support"
default y
@@ -139,7 +150,7 @@ config PATA_OCTEON_CF
config SATA_QSTOR
tristate "Pacific Digital SATA QStor support"
- depends on PCI
+ depends on PCI && SATA_HOST
help
This option enables support for Pacific Digital Serial ATA QStor.
@@ -147,7 +158,7 @@ config SATA_QSTOR
config SATA_SX4
tristate "Promise SATA SX4 support (Experimental)"
- depends on PCI && EXPERIMENTAL
+ depends on PCI && SATA_HOST && EXPERIMENTAL
help
This option enables support for Promise Serial ATA SX4.
@@ -165,8 +176,6 @@ config ATA_BMDMA
if ATA_BMDMA
-comment "SATA SFF controllers with BMDMA"
-
config ATA_PIIX
tristate "Intel ESB, ICH, PIIX3, PIIX4 PATA/SATA support"
depends on PCI
@@ -177,6 +186,10 @@ config ATA_PIIX
If unsure, say N.
+if SATA_HOST
+
+comment "SATA SFF controllers with BMDMA"
+
config SATA_DWC
tristate "DesignWare Cores SATA support"
depends on 460EX
@@ -263,6 +276,8 @@ config SATA_VITESSE
If unsure, say N.
+endif # SATA_HOST
+
comment "PATA SFF controllers with BMDMA"
config PATA_ALI
Index: b/drivers/ata/Makefile
===================================================================
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_ATA_GENERIC) += ata_generic
obj-$(CONFIG_PATA_LEGACY) += pata_legacy.o
libata-y := libata-core.o libata-scsi.o libata-eh.o libata-transport.o
+libata-$(CONFIG_SATA_HOST) += libata-sata.o
libata-$(CONFIG_ATA_SFF) += libata-sff.o
libata-$(CONFIG_SATA_PMP) += libata-pmp.o
libata-$(CONFIG_ATA_ACPI) += libata-acpi.o
Index: b/drivers/ata/libata-core.c
===================================================================
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -70,11 +70,6 @@
#include "libata.h"
#include "libata-transport.h"
-/* debounce timing parameters in msecs { interval, duration, timeout } */
-const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
-const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
-const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
-
const struct ata_port_operations ata_base_port_ops = {
.prereset = ata_std_prereset,
.postreset = ata_std_postreset,
@@ -96,24 +91,8 @@ static unsigned long ata_dev_blacklisted
unsigned int ata_print_id = 1;
-struct ata_force_param {
- const char *name;
- unsigned int cbl;
- int spd_limit;
- unsigned long xfer_mask;
- unsigned int horkage_on;
- unsigned int horkage_off;
- unsigned int lflags;
-};
-
-struct ata_force_ent {
- int port;
- int device;
- struct ata_force_param param;
-};
-
-static struct ata_force_ent *ata_force_tbl;
-static int ata_force_tbl_size;
+struct ata_force_ent *ata_force_tbl;
+int ata_force_tbl_size;
static char ata_force_param_buf[PAGE_SIZE] __initdata;
/* param_buf is thrown away after initialization, disallow read */
@@ -166,11 +145,6 @@ MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
-static bool ata_sstatus_online(u32 sstatus)
-{
- return (sstatus & 0xf) == 0x3;
-}
-
/**
* ata_link_next - link iteration helper
* @link: the previous link, NULL to start
@@ -342,59 +316,6 @@ void ata_force_cbl(struct ata_port *ap)
}
/**
- * ata_force_link_limits - force link limits according to libata.force
- * @link: ATA link of interest
- *
- * Force link flags and SATA spd limit according to libata.force
- * and whine about it. When only the port part is specified
- * (e.g. 1:), the limit applies to all links connected to both
- * the host link and all fan-out ports connected via PMP. If the
- * device part is specified as 0 (e.g. 1.00:), it specifies the
- * first fan-out link not the host link. Device number 15 always
- * points to the host link whether PMP is attached or not. If the
- * controller has slave link, device number 16 points to it.
- *
- * LOCKING:
- * EH context.
- */
-static void ata_force_link_limits(struct ata_link *link)
-{
- bool did_spd = false;
- int linkno = link->pmp;
- int i;
-
- if (ata_is_host_link(link))
- linkno += 15;
-
- for (i = ata_force_tbl_size - 1; i >= 0; i--) {
- const struct ata_force_ent *fe = &ata_force_tbl[i];
-
- if (fe->port != -1 && fe->port != link->ap->print_id)
- continue;
-
- if (fe->device != -1 && fe->device != linkno)
- continue;
-
- /* only honor the first spd limit */
- if (!did_spd && fe->param.spd_limit) {
- link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
- ata_link_printk(link, KERN_NOTICE,
- "FORCE: PHY spd limit set to %s\n",
- fe->param.name);
- did_spd = true;
- }
-
- /* let lflags stack */
- if (fe->param.lflags) {
- link->flags |= fe->param.lflags;
- ata_link_printk(link, KERN_NOTICE,
- "FORCE: link flag 0x%x forced -> 0x%x\n",
- fe->param.lflags, link->flags);
- }
- }
-}
-
-/**
* ata_force_xfermask - force xfermask according to libata.force
* @dev: ATA device of interest
*
@@ -573,34 +494,26 @@ void ata_tf_to_fis(const struct ata_task
fis[19] = 0;
}
-/**
- * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
- * @fis: Buffer from which data will be input
- * @tf: Taskfile to output
- *
- * Converts a serial ATA FIS structure to a standard ATA taskfile.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
+#ifndef CONFIG_SATA_HOST
+int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ bool spm_wakeup)
{
- tf->command = fis[2]; /* status */
- tf->feature = fis[3]; /* error */
-
- tf->lbal = fis[4];
- tf->lbam = fis[5];
- tf->lbah = fis[6];
- tf->device = fis[7];
-
- tf->hob_lbal = fis[8];
- tf->hob_lbam = fis[9];
- tf->hob_lbah = fis[10];
-
- tf->nsect = fis[12];
- tf->hob_nsect = fis[13];
+ return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
+int sata_std_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL_GPL(sata_std_hardreset);
+void ata_std_postreset(struct ata_link *link, unsigned int *classes)
+{
+ DPRINTK("ENTER\n");
+ DPRINTK("EXIT\n");
}
+EXPORT_SYMBOL_GPL(ata_std_postreset);
+#endif
static const u8 ata_rw_cmds[] = {
/* pio multi */
@@ -2039,40 +1952,6 @@ retry:
return rc;
}
-static int ata_do_link_spd_horkage(struct ata_device *dev)
-{
- struct ata_link *plink = ata_dev_phys_link(dev);
- u32 target, target_limit;
-
- if (!sata_scr_valid(plink))
- return 0;
-
- if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
- target = 1;
- else
- return 0;
-
- target_limit = (1 << target) - 1;
-
- /* if already on stricter limit, no need to push further */
- if (plink->sata_spd_limit <= target_limit)
- return 0;
-
- plink->sata_spd_limit = target_limit;
-
- /* Request another EH round by returning -EAGAIN if link is
- * going faster than the target speed. Forward progress is
- * guaranteed by setting sata_spd_limit to target_limit above.
- */
- if (plink->sata_spd > target) {
- ata_dev_printk(dev, KERN_INFO,
- "applying link speed limit horkage to %s\n",
- sata_spd_string(target));
- return -EAGAIN;
- }
- return 0;
-}
-
static inline u8 ata_dev_knobble(struct ata_device *dev)
{
struct ata_port *ap = dev->link->ap;
@@ -2083,51 +1962,6 @@ static inline u8 ata_dev_knobble(struct
return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
}
-static int ata_dev_config_ncq(struct ata_device *dev,
- char *desc, size_t desc_sz)
-{
- struct ata_port *ap = dev->link->ap;
- int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
- unsigned int err_mask;
- char *aa_desc = "";
-
- if (!ata_id_has_ncq(dev->id)) {
- desc[0] = '\0';
- return 0;
- }
- if (dev->horkage & ATA_HORKAGE_NONCQ) {
- snprintf(desc, desc_sz, "NCQ (not used)");
- return 0;
- }
- if (ap->flags & ATA_FLAG_NCQ) {
- hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
- dev->flags |= ATA_DFLAG_NCQ;
- }
-
- if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
- (ap->flags & ATA_FLAG_FPDMA_AA) &&
- ata_id_has_fpdma_aa(dev->id)) {
- err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
- SATA_FPDMA_AA);
- if (err_mask) {
- ata_dev_printk(dev, KERN_ERR, "failed to enable AA"
- "(error_mask=0x%x)\n", err_mask);
- if (err_mask != AC_ERR_DEV) {
- dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
- return -EIO;
- }
- } else
- aa_desc = ", AA";
- }
-
- if (hdepth >= ddepth)
- snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
- else
- snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
- ddepth, aa_desc);
- return 0;
-}
-
/**
* ata_dev_configure - Configure the specified ATA/ATAPI device
* @dev: Target device to configure
@@ -2645,35 +2479,6 @@ int ata_bus_probe(struct ata_port *ap)
}
/**
- * sata_print_link_status - Print SATA link status
- * @link: SATA link to printk link status about
- *
- * This function prints link speed and status of a SATA link.
- *
- * LOCKING:
- * None.
- */
-static void sata_print_link_status(struct ata_link *link)
-{
- u32 sstatus, scontrol, tmp;
-
- if (sata_scr_read(link, SCR_STATUS, &sstatus))
- return;
- sata_scr_read(link, SCR_CONTROL, &scontrol);
-
- if (ata_phys_link_online(link)) {
- tmp = (sstatus >> 4) & 0xf;
- ata_link_printk(link, KERN_INFO,
- "SATA link up %s (SStatus %X SControl %X)\n",
- sata_spd_string(tmp), sstatus, scontrol);
- } else {
- ata_link_printk(link, KERN_INFO,
- "SATA link down (SStatus %X SControl %X)\n",
- sstatus, scontrol);
- }
-}
-
-/**
* ata_dev_pair - return other device on cable
* @adev: device
*
@@ -2690,160 +2495,6 @@ struct ata_device *ata_dev_pair(struct a
return pair;
}
-/**
- * sata_down_spd_limit - adjust SATA spd limit downward
- * @link: Link to adjust SATA spd limit for
- * @spd_limit: Additional limit
- *
- * Adjust SATA spd limit of @link downward. Note that this
- * function only adjusts the limit. The change must be applied
- * using sata_set_spd().
- *
- * If @spd_limit is non-zero, the speed is limited to equal to or
- * lower than @spd_limit if such speed is supported. If
- * @spd_limit is slower than any supported speed, only the lowest
- * supported speed is allowed.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 0 on success, negative errno on failure
- */
-int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
-{
- u32 sstatus, spd, mask;
- int rc, bit;
-
- if (!sata_scr_valid(link))
- return -EOPNOTSUPP;
-
- /* If SCR can be read, use it to determine the current SPD.
- * If not, use cached value in link->sata_spd.
- */
- rc = sata_scr_read(link, SCR_STATUS, &sstatus);
- if (rc == 0 && ata_sstatus_online(sstatus))
- spd = (sstatus >> 4) & 0xf;
- else
- spd = link->sata_spd;
-
- mask = link->sata_spd_limit;
- if (mask <= 1)
- return -EINVAL;
-
- /* unconditionally mask off the highest bit */
- bit = fls(mask) - 1;
- mask &= ~(1 << bit);
-
- /* Mask off all speeds higher than or equal to the current
- * one. Force 1.5Gbps if current SPD is not available.
- */
- if (spd > 1)
- mask &= (1 << (spd - 1)) - 1;
- else
- mask &= 1;
-
- /* were we already at the bottom? */
- if (!mask)
- return -EINVAL;
-
- if (spd_limit) {
- if (mask & ((1 << spd_limit) - 1))
- mask &= (1 << spd_limit) - 1;
- else {
- bit = ffs(mask) - 1;
- mask = 1 << bit;
- }
- }
-
- link->sata_spd_limit = mask;
-
- ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
- sata_spd_string(fls(mask)));
-
- return 0;
-}
-
-static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
-{
- struct ata_link *host_link = &link->ap->link;
- u32 limit, target, spd;
-
- limit = link->sata_spd_limit;
-
- /* Don't configure downstream link faster than upstream link.
- * It doesn't speed up anything and some PMPs choke on such
- * configuration.
- */
- if (!ata_is_host_link(link) && host_link->sata_spd)
- limit &= (1 << host_link->sata_spd) - 1;
-
- if (limit == UINT_MAX)
- target = 0;
- else
- target = fls(limit);
-
- spd = (*scontrol >> 4) & 0xf;
- *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
-
- return spd != target;
-}
-
-/**
- * sata_set_spd_needed - is SATA spd configuration needed
- * @link: Link in question
- *
- * Test whether the spd limit in SControl matches
- * @link->sata_spd_limit. This function is used to determine
- * whether hardreset is necessary to apply SATA spd
- * configuration.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 1 if SATA spd configuration is needed, 0 otherwise.
- */
-static int sata_set_spd_needed(struct ata_link *link)
-{
- u32 scontrol;
-
- if (sata_scr_read(link, SCR_CONTROL, &scontrol))
- return 1;
-
- return __sata_set_spd_needed(link, &scontrol);
-}
-
-/**
- * sata_set_spd - set SATA spd according to spd limit
- * @link: Link to set SATA spd for
- *
- * Set SATA spd of @link according to sata_spd_limit.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 0 if spd doesn't need to be changed, 1 if spd has been
- * changed. Negative errno if SCR registers are inaccessible.
- */
-int sata_set_spd(struct ata_link *link)
-{
- u32 scontrol;
- int rc;
-
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- return rc;
-
- if (!__sata_set_spd_needed(link, &scontrol))
- return 0;
-
- if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
- return rc;
-
- return 1;
-}
-
/*
* This mode timing computation functionality is ported over from
* drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
@@ -3437,209 +3088,6 @@ int ata_wait_after_reset(struct ata_link
}
/**
- * sata_link_debounce - debounce SATA phy status
- * @link: ATA link to debounce SATA phy status for
- * @params: timing parameters { interval, duratinon, timeout } in msec
- * @deadline: deadline jiffies for the operation
- *
- * Make sure SStatus of @link reaches stable state, determined by
- * holding the same value where DET is not 1 for @duration polled
- * every @interval, before @timeout. Timeout constraints the
- * beginning of the stable state. Because DET gets stuck at 1 on
- * some controllers after hot unplugging, this functions waits
- * until timeout then returns 0 if DET is stable at 1.
- *
- * @timeout is further limited by @deadline. The sooner of the
- * two is used.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int sata_link_debounce(struct ata_link *link, const unsigned long *params,
- unsigned long deadline)
-{
- unsigned long interval = params[0];
- unsigned long duration = params[1];
- unsigned long last_jiffies, t;
- u32 last, cur;
- int rc;
-
- t = ata_deadline(jiffies, params[2]);
- if (time_before(t, deadline))
- deadline = t;
-
- if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
- return rc;
- cur &= 0xf;
-
- last = cur;
- last_jiffies = jiffies;
-
- while (1) {
- ata_msleep(link->ap, interval);
- if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
- return rc;
- cur &= 0xf;
-
- /* DET stable? */
- if (cur == last) {
- if (cur == 1 && time_before(jiffies, deadline))
- continue;
- if (time_after(jiffies,
- ata_deadline(last_jiffies, duration)))
- return 0;
- continue;
- }
-
- /* unstable, start over */
- last = cur;
- last_jiffies = jiffies;
-
- /* Check deadline. If debouncing failed, return
- * -EPIPE to tell upper layer to lower link speed.
- */
- if (time_after(jiffies, deadline))
- return -EPIPE;
- }
-}
-
-/**
- * sata_link_resume - resume SATA link
- * @link: ATA link to resume SATA
- * @params: timing parameters { interval, duratinon, timeout } in msec
- * @deadline: deadline jiffies for the operation
- *
- * Resume SATA phy @link and debounce it.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int sata_link_resume(struct ata_link *link, const unsigned long *params,
- unsigned long deadline)
-{
- int tries = ATA_LINK_RESUME_TRIES;
- u32 scontrol, serror;
- int rc;
-
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- return rc;
-
- /*
- * Writes to SControl sometimes get ignored under certain
- * controllers (ata_piix SIDPR). Make sure DET actually is
- * cleared.
- */
- do {
- scontrol = (scontrol & 0x0f0) | 0x300;
- if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
- return rc;
- /*
- * Some PHYs react badly if SStatus is pounded
- * immediately after resuming. Delay 200ms before
- * debouncing.
- */
- ata_msleep(link->ap, 200);
-
- /* is SControl restored correctly? */
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- return rc;
- } while ((scontrol & 0xf0f) != 0x300 && --tries);
-
- if ((scontrol & 0xf0f) != 0x300) {
- ata_link_printk(link, KERN_ERR,
- "failed to resume link (SControl %X)\n",
- scontrol);
- return 0;
- }
-
- if (tries < ATA_LINK_RESUME_TRIES)
- ata_link_printk(link, KERN_WARNING,
- "link resume succeeded after %d retries\n",
- ATA_LINK_RESUME_TRIES - tries);
-
- if ((rc = sata_link_debounce(link, params, deadline)))
- return rc;
-
- /* clear SError, some PHYs require this even for SRST to work */
- if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
- rc = sata_scr_write(link, SCR_ERROR, serror);
-
- return rc != -EINVAL ? rc : 0;
-}
-
-/**
- * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
- * @link: ATA link to manipulate SControl for
- * @policy: LPM policy to configure
- * @spm_wakeup: initiate LPM transition to active state
- *
- * Manipulate the IPM field of the SControl register of @link
- * according to @policy. If @policy is ATA_LPM_MAX_POWER and
- * @spm_wakeup is %true, the SPM field is manipulated to wake up
- * the link. This function also clears PHYRDY_CHG before
- * returning.
- *
- * LOCKING:
- * EH context.
- *
- * RETURNS:
- * 0 on succes, -errno otherwise.
- */
-int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
- bool spm_wakeup)
-{
- struct ata_eh_context *ehc = &link->eh_context;
- bool woken_up = false;
- u32 scontrol;
- int rc;
-
- rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
- if (rc)
- return rc;
-
- switch (policy) {
- case ATA_LPM_MAX_POWER:
- /* disable all LPM transitions */
- scontrol |= (0x3 << 8);
- /* initiate transition to active state */
- if (spm_wakeup) {
- scontrol |= (0x4 << 12);
- woken_up = true;
- }
- break;
- case ATA_LPM_MED_POWER:
- /* allow LPM to PARTIAL */
- scontrol &= ~(0x1 << 8);
- scontrol |= (0x2 << 8);
- break;
- case ATA_LPM_MIN_POWER:
- /* no restrictions on LPM transitions */
- scontrol &= ~(0x3 << 8);
- break;
- default:
- WARN_ON(1);
- }
-
- rc = sata_scr_write(link, SCR_CONTROL, scontrol);
- if (rc)
- return rc;
-
- /* give the link time to transit out of LPM state */
- if (woken_up)
- msleep(10);
-
- /* clear PHYRDY_CHG from SError */
- ehc->i.serror &= ~SERR_PHYRDY_CHG;
- return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
-}
-
-/**
* ata_std_prereset - prepare for reset
* @link: ATA link to be reset
* @deadline: deadline jiffies for the operation
@@ -3658,23 +3106,26 @@ int sata_link_scr_lpm(struct ata_link *l
*/
int ata_std_prereset(struct ata_link *link, unsigned long deadline)
{
- struct ata_port *ap = link->ap;
struct ata_eh_context *ehc = &link->eh_context;
- const unsigned long *timing = sata_ehc_deb_timing(ehc);
- int rc;
+ struct ata_port *ap __maybe_unused = link->ap;
/* if we're about to do hardreset, nothing more to do */
if (ehc->i.action & ATA_EH_HARDRESET)
return 0;
+#ifdef CONFIG_SATA_HOST
/* if SATA, resume link */
if (ap->flags & ATA_FLAG_SATA) {
+ const unsigned long *timing = sata_ehc_deb_timing(ehc);
+ int rc;
+
rc = sata_link_resume(link, timing, deadline);
/* whine about phy resume failure but proceed */
if (rc && rc != -EOPNOTSUPP)
ata_link_printk(link, KERN_WARNING, "failed to resume "
"link for reset (errno=%d)\n", rc);
}
+#endif
/* no point in trying softreset on offline link */
if (ata_phys_link_offline(link))
@@ -3684,173 +3135,6 @@ int ata_std_prereset(struct ata_link *li
}
/**
- * sata_link_hardreset - reset link via SATA phy reset
- * @link: link to reset
- * @timing: timing parameters { interval, duratinon, timeout } in msec
- * @deadline: deadline jiffies for the operation
- * @online: optional out parameter indicating link onlineness
- * @check_ready: optional callback to check link readiness
- *
- * SATA phy-reset @link using DET bits of SControl register.
- * After hardreset, link readiness is waited upon using
- * ata_wait_ready() if @check_ready is specified. LLDs are
- * allowed to not specify @check_ready and wait itself after this
- * function returns. Device classification is LLD's
- * responsibility.
- *
- * *@...ine is set to one iff reset succeeded and @link is online
- * after reset.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
-int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
- unsigned long deadline,
- bool *online, int (*check_ready)(struct ata_link *))
-{
- u32 scontrol;
- int rc;
-
- DPRINTK("ENTER\n");
-
- if (online)
- *online = false;
-
- if (sata_set_spd_needed(link)) {
- /* SATA spec says nothing about how to reconfigure
- * spd. To be on the safe side, turn off phy during
- * reconfiguration. This works for at least ICH7 AHCI
- * and Sil3124.
- */
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- goto out;
-
- scontrol = (scontrol & 0x0f0) | 0x304;
-
- if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
- goto out;
-
- sata_set_spd(link);
- }
-
- /* issue phy wake/reset */
- if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
- goto out;
-
- scontrol = (scontrol & 0x0f0) | 0x301;
-
- if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
- goto out;
-
- /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
- * 10.4.2 says at least 1 ms.
- */
- ata_msleep(link->ap, 1);
-
- /* bring link back */
- rc = sata_link_resume(link, timing, deadline);
- if (rc)
- goto out;
- /* if link is offline nothing more to do */
- if (ata_phys_link_offline(link))
- goto out;
-
- /* Link is online. From this point, -ENODEV too is an error. */
- if (online)
- *online = true;
-
- if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
- /* If PMP is supported, we have to do follow-up SRST.
- * Some PMPs don't send D2H Reg FIS after hardreset if
- * the first port is empty. Wait only for
- * ATA_TMOUT_PMP_SRST_WAIT.
- */
- if (check_ready) {
- unsigned long pmp_deadline;
-
- pmp_deadline = ata_deadline(jiffies,
- ATA_TMOUT_PMP_SRST_WAIT);
- if (time_after(pmp_deadline, deadline))
- pmp_deadline = deadline;
- ata_wait_ready(link, pmp_deadline, check_ready);
- }
- rc = -EAGAIN;
- goto out;
- }
-
- rc = 0;
- if (check_ready)
- rc = ata_wait_ready(link, deadline, check_ready);
- out:
- if (rc && rc != -EAGAIN) {
- /* online is set iff link is online && reset succeeded */
- if (online)
- *online = false;
- ata_link_printk(link, KERN_ERR,
- "COMRESET failed (errno=%d)\n", rc);
- }
- DPRINTK("EXIT, rc=%d\n", rc);
- return rc;
-}
-
-/**
- * sata_std_hardreset - COMRESET w/o waiting or classification
- * @link: link to reset
- * @class: resulting class of attached device
- * @deadline: deadline jiffies for the operation
- *
- * Standard SATA COMRESET w/o waiting or classification.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 if link offline, -EAGAIN if link online, -errno on errors.
- */
-int sata_std_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
-{
- const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
- bool online;
- int rc;
-
- /* do hardreset */
- rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
- return online ? -EAGAIN : rc;
-}
-
-/**
- * ata_std_postreset - standard postreset callback
- * @link: the target ata_link
- * @classes: classes of attached devices
- *
- * This function is invoked after a successful reset. Note that
- * the device might have been reset more than once using
- * different reset methods before postreset is invoked.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- */
-void ata_std_postreset(struct ata_link *link, unsigned int *classes)
-{
- u32 serror;
-
- DPRINTK("ENTER\n");
-
- /* reset complete, clear SError */
- if (!sata_scr_read(link, SCR_ERROR, &serror))
- sata_scr_write(link, SCR_ERROR, serror);
-
- /* print link status */
- sata_print_link_status(link);
-
- DPRINTK("EXIT\n");
-}
-
-/**
* ata_dev_same_device - Determine whether new ID matches configured device
* @dev: device to compare against
* @new_class: class of the new device
@@ -5425,39 +4709,6 @@ void ata_link_init(struct ata_port *ap,
}
/**
- * sata_link_init_spd - Initialize link->sata_spd_limit
- * @link: Link to configure sata_spd_limit for
- *
- * Initialize @link->[hw_]sata_spd_limit to the currently
- * configured value.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int sata_link_init_spd(struct ata_link *link)
-{
- u8 spd;
- int rc;
-
- rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
- if (rc)
- return rc;
-
- spd = (link->saved_scontrol >> 4) & 0xf;
- if (spd)
- link->hw_sata_spd_limit &= (1 << spd) - 1;
-
- ata_force_link_limits(link);
-
- link->sata_spd_limit = link->hw_sata_spd_limit;
-
- return 0;
-}
-
-/**
* ata_port_alloc - allocate and initialize basic ATA port resources
* @host: ATA host this allocated port belongs to
*
@@ -6599,9 +5850,6 @@ const struct ata_port_info ata_dummy_por
* likely to change as new drivers are added and updated.
* Do not depend on ABI/API stability.
*/
-EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
-EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
-EXPORT_SYMBOL_GPL(sata_deb_timing_long);
EXPORT_SYMBOL_GPL(ata_base_port_ops);
EXPORT_SYMBOL_GPL(sata_port_ops);
EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
@@ -6623,7 +5871,6 @@ EXPORT_SYMBOL_GPL(ata_qc_complete);
EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
EXPORT_SYMBOL_GPL(atapi_cmd_type);
EXPORT_SYMBOL_GPL(ata_tf_to_fis);
-EXPORT_SYMBOL_GPL(ata_tf_from_fis);
EXPORT_SYMBOL_GPL(ata_pack_xfermask);
EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
@@ -6635,15 +5882,8 @@ EXPORT_SYMBOL_GPL(ata_do_set_mode);
EXPORT_SYMBOL_GPL(ata_std_qc_defer);
EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
EXPORT_SYMBOL_GPL(ata_dev_disable);
-EXPORT_SYMBOL_GPL(sata_set_spd);
EXPORT_SYMBOL_GPL(ata_wait_after_reset);
-EXPORT_SYMBOL_GPL(sata_link_debounce);
-EXPORT_SYMBOL_GPL(sata_link_resume);
-EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
EXPORT_SYMBOL_GPL(ata_std_prereset);
-EXPORT_SYMBOL_GPL(sata_link_hardreset);
-EXPORT_SYMBOL_GPL(sata_std_hardreset);
-EXPORT_SYMBOL_GPL(ata_std_postreset);
EXPORT_SYMBOL_GPL(ata_dev_classify);
EXPORT_SYMBOL_GPL(ata_dev_pair);
EXPORT_SYMBOL_GPL(ata_ratelimit);
@@ -6696,12 +5936,10 @@ EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
EXPORT_SYMBOL_GPL(ata_link_abort);
EXPORT_SYMBOL_GPL(ata_port_abort);
EXPORT_SYMBOL_GPL(ata_port_freeze);
-EXPORT_SYMBOL_GPL(sata_async_notification);
EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
-EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
EXPORT_SYMBOL_GPL(ata_do_eh);
EXPORT_SYMBOL_GPL(ata_std_error_handler);
Index: b/drivers/ata/libata-eh.c
===================================================================
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1081,79 +1081,6 @@ int ata_port_freeze(struct ata_port *ap)
}
/**
- * sata_async_notification - SATA async notification handler
- * @ap: ATA port where async notification is received
- *
- * Handler to be called when async notification via SDB FIS is
- * received. This function schedules EH if necessary.
- *
- * LOCKING:
- * spin_lock_irqsave(host lock)
- *
- * RETURNS:
- * 1 if EH is scheduled, 0 otherwise.
- */
-int sata_async_notification(struct ata_port *ap)
-{
- u32 sntf;
- int rc;
-
- if (!(ap->flags & ATA_FLAG_AN))
- return 0;
-
- rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
- if (rc == 0)
- sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
-
- if (!sata_pmp_attached(ap) || rc) {
- /* PMP is not attached or SNTF is not available */
- if (!sata_pmp_attached(ap)) {
- /* PMP is not attached. Check whether ATAPI
- * AN is configured. If so, notify media
- * change.
- */
- struct ata_device *dev = ap->link.device;
-
- if ((dev->class == ATA_DEV_ATAPI) &&
- (dev->flags & ATA_DFLAG_AN))
- ata_scsi_media_change_notify(dev);
- return 0;
- } else {
- /* PMP is attached but SNTF is not available.
- * ATAPI async media change notification is
- * not used. The PMP must be reporting PHY
- * status change, schedule EH.
- */
- ata_port_schedule_eh(ap);
- return 1;
- }
- } else {
- /* PMP is attached and SNTF is available */
- struct ata_link *link;
-
- /* check and notify ATAPI AN */
- ata_for_each_link(link, ap, EDGE) {
- if (!(sntf & (1 << link->pmp)))
- continue;
-
- if ((link->device->class == ATA_DEV_ATAPI) &&
- (link->device->flags & ATA_DFLAG_AN))
- ata_scsi_media_change_notify(link->device);
- }
-
- /* If PMP is reporting that PHY status of some
- * downstream ports has changed, schedule EH.
- */
- if (sntf & (1 << SATA_PMP_CTRL_PORT)) {
- ata_port_schedule_eh(ap);
- return 1;
- }
-
- return 0;
- }
-}
-
-/**
* ata_eh_freeze_port - EH helper to freeze port
* @ap: ATA port to freeze
*
@@ -1407,98 +1334,6 @@ static const char *ata_err_string(unsign
}
/**
- * ata_read_log_page - read a specific log page
- * @dev: target device
- * @page: page to read
- * @buf: buffer to store read page
- * @sectors: number of sectors to read
- *
- * Read log page using READ_LOG_EXT command.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * 0 on success, AC_ERR_* mask otherwise.
- */
-static unsigned int ata_read_log_page(struct ata_device *dev,
- u8 page, void *buf, unsigned int sectors)
-{
- struct ata_taskfile tf;
- unsigned int err_mask;
-
- DPRINTK("read log page - page %d\n", page);
-
- ata_tf_init(dev, &tf);
- tf.command = ATA_CMD_READ_LOG_EXT;
- tf.lbal = page;
- tf.nsect = sectors;
- tf.hob_nsect = sectors >> 8;
- tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
- tf.protocol = ATA_PROT_PIO;
-
- err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
- buf, sectors * ATA_SECT_SIZE, 0);
-
- DPRINTK("EXIT, err_mask=%x\n", err_mask);
- return err_mask;
-}
-
-/**
- * ata_eh_read_log_10h - Read log page 10h for NCQ error details
- * @dev: Device to read log page 10h from
- * @tag: Resulting tag of the failed command
- * @tf: Resulting taskfile registers of the failed command
- *
- * Read log page 10h to obtain NCQ error details and clear error
- * condition.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
-static int ata_eh_read_log_10h(struct ata_device *dev,
- int *tag, struct ata_taskfile *tf)
-{
- u8 *buf = dev->link->ap->sector_buf;
- unsigned int err_mask;
- u8 csum;
- int i;
-
- err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1);
- if (err_mask)
- return -EIO;
-
- csum = 0;
- for (i = 0; i < ATA_SECT_SIZE; i++)
- csum += buf[i];
- if (csum)
- ata_dev_printk(dev, KERN_WARNING,
- "invalid checksum 0x%x on log page 10h\n", csum);
-
- if (buf[0] & 0x80)
- return -ENOENT;
-
- *tag = buf[0] & 0x1f;
-
- tf->command = buf[2];
- tf->feature = buf[3];
- tf->lbal = buf[4];
- tf->lbam = buf[5];
- tf->lbah = buf[6];
- tf->device = buf[7];
- tf->hob_lbal = buf[8];
- tf->hob_lbam = buf[9];
- tf->hob_lbah = buf[10];
- tf->nsect = buf[12];
- tf->hob_nsect = buf[13];
-
- return 0;
-}
-
-/**
* atapi_eh_tur - perform ATAPI TEST_UNIT_READY
* @dev: target ATAPI device
* @r_sense_key: out parameter for sense_key
@@ -1583,117 +1418,10 @@ static unsigned int atapi_eh_request_sen
sense_buf, SCSI_SENSE_BUFFERSIZE, 0);
}
-/**
- * ata_eh_analyze_serror - analyze SError for a failed port
- * @link: ATA link to analyze SError for
- *
- * Analyze SError if available and further determine cause of
- * failure.
- *
- * LOCKING:
- * None.
- */
-static void ata_eh_analyze_serror(struct ata_link *link)
-{
- struct ata_eh_context *ehc = &link->eh_context;
- u32 serror = ehc->i.serror;
- unsigned int err_mask = 0, action = 0;
- u32 hotplug_mask;
-
- if (serror & (SERR_PERSISTENT | SERR_DATA)) {
- err_mask |= AC_ERR_ATA_BUS;
- action |= ATA_EH_RESET;
- }
- if (serror & SERR_PROTOCOL) {
- err_mask |= AC_ERR_HSM;
- action |= ATA_EH_RESET;
- }
- if (serror & SERR_INTERNAL) {
- err_mask |= AC_ERR_SYSTEM;
- action |= ATA_EH_RESET;
- }
-
- /* Determine whether a hotplug event has occurred. Both
- * SError.N/X are considered hotplug events for enabled or
- * host links. For disabled PMP links, only N bit is
- * considered as X bit is left at 1 for link plugging.
- */
- if (link->lpm_policy != ATA_LPM_MAX_POWER)
- hotplug_mask = 0; /* hotplug doesn't work w/ LPM */
- else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link))
- hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG;
- else
- hotplug_mask = SERR_PHYRDY_CHG;
-
- if (serror & hotplug_mask)
- ata_ehi_hotplugged(&ehc->i);
-
- ehc->i.err_mask |= err_mask;
- ehc->i.action |= action;
-}
-
-/**
- * ata_eh_analyze_ncq_error - analyze NCQ error
- * @link: ATA link to analyze NCQ error for
- *
- * Read log page 10h, determine the offending qc and acquire
- * error status TF. For NCQ device errors, all LLDDs have to do
- * is setting AC_ERR_DEV in ehi->err_mask. This function takes
- * care of the rest.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- */
-void ata_eh_analyze_ncq_error(struct ata_link *link)
-{
- struct ata_port *ap = link->ap;
- struct ata_eh_context *ehc = &link->eh_context;
- struct ata_device *dev = link->device;
- struct ata_queued_cmd *qc;
- struct ata_taskfile tf;
- int tag, rc;
-
- /* if frozen, we can't do much */
- if (ap->pflags & ATA_PFLAG_FROZEN)
- return;
-
- /* is it NCQ device error? */
- if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV))
- return;
-
- /* has LLDD analyzed already? */
- for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
- qc = __ata_qc_from_tag(ap, tag);
-
- if (!(qc->flags & ATA_QCFLAG_FAILED))
- continue;
-
- if (qc->err_mask)
- return;
- }
-
- /* okay, this error is ours */
- memset(&tf, 0, sizeof(tf));
- rc = ata_eh_read_log_10h(dev, &tag, &tf);
- if (rc) {
- ata_link_printk(link, KERN_ERR, "failed to read log page 10h "
- "(errno=%d)\n", rc);
- return;
- }
-
- if (!(link->sactive & (1 << tag))) {
- ata_link_printk(link, KERN_ERR, "log page 10h reported "
- "inactive tag %d\n", tag);
- return;
- }
-
- /* we've got the perpetrator, condemn it */
- qc = __ata_qc_from_tag(ap, tag);
- memcpy(&qc->result_tf, &tf, sizeof(tf));
- qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
- qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ;
- ehc->i.err_mask &= ~AC_ERR_DEV;
-}
+#ifndef CONFIG_SATA_HOST
+void ata_eh_analyze_ncq_error(struct ata_link *link) { }
+EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
+#endif
/**
* ata_eh_analyze_tf - analyze taskfile of a failed qc
@@ -2349,7 +2077,7 @@ static void ata_eh_link_report(struct at
ata_link_printk(link, KERN_ERR, "%s\n", desc);
}
-#ifdef CONFIG_ATA_VERBOSE_ERROR
+#if defined(CONFIG_SATA_HOST) && defined(CONFIG_ATA_VERBOSE_ERROR)
if (ehc->i.serror)
ata_link_printk(link, KERN_ERR,
"SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
@@ -3252,135 +2980,6 @@ static int ata_eh_maybe_retry_flush(stru
return rc;
}
-/**
- * ata_eh_set_lpm - configure SATA interface power management
- * @link: link to configure power management
- * @policy: the link power management policy
- * @r_failed_dev: out parameter for failed device
- *
- * Enable SATA Interface power management. This will enable
- * Device Interface Power Management (DIPM) for min_power
- * policy, and then call driver specific callbacks for
- * enabling Host Initiated Power management.
- *
- * LOCKING:
- * EH context.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
- struct ata_device **r_failed_dev)
-{
- struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL;
- struct ata_eh_context *ehc = &link->eh_context;
- struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL;
- enum ata_lpm_policy old_policy = link->lpm_policy;
- unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM;
- unsigned int err_mask;
- int rc;
-
- /* if the link or host doesn't do LPM, noop */
- if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm))
- return 0;
-
- /*
- * DIPM is enabled only for MIN_POWER as some devices
- * misbehave when the host NACKs transition to SLUMBER. Order
- * device and link configurations such that the host always
- * allows DIPM requests.
- */
- ata_for_each_dev(dev, link, ENABLED) {
- bool hipm = ata_id_has_hipm(dev->id);
- bool dipm = ata_id_has_dipm(dev->id);
-
- /* find the first enabled and LPM enabled devices */
- if (!link_dev)
- link_dev = dev;
-
- if (!lpm_dev && (hipm || dipm))
- lpm_dev = dev;
-
- hints &= ~ATA_LPM_EMPTY;
- if (!hipm)
- hints &= ~ATA_LPM_HIPM;
-
- /* disable DIPM before changing link config */
- if (policy != ATA_LPM_MIN_POWER && dipm) {
- err_mask = ata_dev_set_feature(dev,
- SETFEATURES_SATA_DISABLE, SATA_DIPM);
- if (err_mask && err_mask != AC_ERR_DEV) {
- ata_dev_printk(dev, KERN_WARNING,
- "failed to disable DIPM, Emask 0x%x\n",
- err_mask);
- rc = -EIO;
- goto fail;
- }
- }
- }
-
- if (ap) {
- rc = ap->ops->set_lpm(link, policy, hints);
- if (!rc && ap->slave_link)
- rc = ap->ops->set_lpm(ap->slave_link, policy, hints);
- } else
- rc = sata_pmp_set_lpm(link, policy, hints);
-
- /*
- * Attribute link config failure to the first (LPM) enabled
- * device on the link.
- */
- if (rc) {
- if (rc == -EOPNOTSUPP) {
- link->flags |= ATA_LFLAG_NO_LPM;
- return 0;
- }
- dev = lpm_dev ? lpm_dev : link_dev;
- goto fail;
- }
-
- /*
- * Low level driver acked the transition. Issue DIPM command
- * with the new policy set.
- */
- link->lpm_policy = policy;
- if (ap && ap->slave_link)
- ap->slave_link->lpm_policy = policy;
-
- /* host config updated, enable DIPM if transitioning to MIN_POWER */
- ata_for_each_dev(dev, link, ENABLED) {
- if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) {
- err_mask = ata_dev_set_feature(dev,
- SETFEATURES_SATA_ENABLE, SATA_DIPM);
- if (err_mask && err_mask != AC_ERR_DEV) {
- ata_dev_printk(dev, KERN_WARNING,
- "failed to enable DIPM, Emask 0x%x\n",
- err_mask);
- rc = -EIO;
- goto fail;
- }
- }
- }
-
- return 0;
-
-fail:
- /* restore the old policy */
- link->lpm_policy = old_policy;
- if (ap && ap->slave_link)
- ap->slave_link->lpm_policy = old_policy;
-
- /* if no device or only one more chance is left, disable LPM */
- if (!dev || ehc->tries[dev->devno] <= 2) {
- ata_link_printk(link, KERN_WARNING,
- "disabling LPM on the link\n");
- link->flags |= ATA_LFLAG_NO_LPM;
- }
- if (r_failed_dev)
- *r_failed_dev = dev;
- return rc;
-}
-
static int ata_link_nr_enabled(struct ata_link *link)
{
struct ata_device *dev;
Index: b/drivers/ata/libata-sata.c
===================================================================
--- /dev/null
+++ b/drivers/ata/libata-sata.c
@@ -0,0 +1,1242 @@
+/*
+ * libata-sff.c - libata SATA host support
+ *
+ * Maintained by: Jeff Garzik <jgarzik@...ox.com>
+ * Please ALWAYS copy linux-ide@...r.kernel.org
+ * on emails.
+ *
+ * Copyright 2003-2006 Red Hat, Inc. All rights reserved.
+ * Copyright 2003-2006 Jeff Garzik
+ *
+ *
+ * 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.*
+ *
+ * Hardware documentation available from http://www.t13.org/ and
+ * http://www.sata-io.org/
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/libata.h>
+#include "libata.h"
+
+/* debounce timing parameters in msecs { interval, duration, timeout } */
+const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
+EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
+const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
+EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
+const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
+EXPORT_SYMBOL_GPL(sata_deb_timing_long);
+
+/**
+ * ata_force_link_limits - force link limits according to libata.force
+ * @link: ATA link of interest
+ *
+ * Force link flags and SATA spd limit according to libata.force
+ * and whine about it. When only the port part is specified
+ * (e.g. 1:), the limit applies to all links connected to both
+ * the host link and all fan-out ports connected via PMP. If the
+ * device part is specified as 0 (e.g. 1.00:), it specifies the
+ * first fan-out link not the host link. Device number 15 always
+ * points to the host link whether PMP is attached or not. If the
+ * controller has slave link, device number 16 points to it.
+ *
+ * LOCKING:
+ * EH context.
+ */
+static void ata_force_link_limits(struct ata_link *link)
+{
+ bool did_spd = false;
+ int linkno = link->pmp;
+ int i;
+
+ if (ata_is_host_link(link))
+ linkno += 15;
+
+ for (i = ata_force_tbl_size - 1; i >= 0; i--) {
+ const struct ata_force_ent *fe = &ata_force_tbl[i];
+
+ if (fe->port != -1 && fe->port != link->ap->print_id)
+ continue;
+
+ if (fe->device != -1 && fe->device != linkno)
+ continue;
+
+ /* only honor the first spd limit */
+ if (!did_spd && fe->param.spd_limit) {
+ link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
+ ata_link_printk(link, KERN_NOTICE,
+ "FORCE: PHY spd limit set to %s\n",
+ fe->param.name);
+ did_spd = true;
+ }
+
+ /* let lflags stack */
+ if (fe->param.lflags) {
+ link->flags |= fe->param.lflags;
+ ata_link_printk(link, KERN_NOTICE,
+ "FORCE: link flag 0x%x forced -> 0x%x\n",
+ fe->param.lflags, link->flags);
+ }
+ }
+}
+
+/**
+ * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
+ * @fis: Buffer from which data will be input
+ * @tf: Taskfile to output
+ *
+ * Converts a serial ATA FIS structure to a standard ATA taskfile.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
+void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
+{
+ tf->command = fis[2]; /* status */
+ tf->feature = fis[3]; /* error */
+
+ tf->lbal = fis[4];
+ tf->lbam = fis[5];
+ tf->lbah = fis[6];
+ tf->device = fis[7];
+
+ tf->hob_lbal = fis[8];
+ tf->hob_lbam = fis[9];
+ tf->hob_lbah = fis[10];
+
+ tf->nsect = fis[12];
+ tf->hob_nsect = fis[13];
+}
+EXPORT_SYMBOL_GPL(ata_tf_from_fis);
+
+int ata_do_link_spd_horkage(struct ata_device *dev)
+{
+ struct ata_link *plink = ata_dev_phys_link(dev);
+ u32 target, target_limit;
+
+ if (!sata_scr_valid(plink))
+ return 0;
+
+ if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
+ target = 1;
+ else
+ return 0;
+
+ target_limit = (1 << target) - 1;
+
+ /* if already on stricter limit, no need to push further */
+ if (plink->sata_spd_limit <= target_limit)
+ return 0;
+
+ plink->sata_spd_limit = target_limit;
+
+ /* Request another EH round by returning -EAGAIN if link is
+ * going faster than the target speed. Forward progress is
+ * guaranteed by setting sata_spd_limit to target_limit above.
+ */
+ if (plink->sata_spd > target) {
+ ata_dev_printk(dev, KERN_INFO,
+ "applying link speed limit horkage to %s\n",
+ sata_spd_string(target));
+ return -EAGAIN;
+ }
+ return 0;
+}
+
+int ata_dev_config_ncq(struct ata_device *dev, char *desc, size_t desc_sz)
+{
+ struct ata_port *ap = dev->link->ap;
+ int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
+ unsigned int err_mask;
+ char *aa_desc = "";
+
+ if (!ata_id_has_ncq(dev->id)) {
+ desc[0] = '\0';
+ return 0;
+ }
+ if (dev->horkage & ATA_HORKAGE_NONCQ) {
+ snprintf(desc, desc_sz, "NCQ (not used)");
+ return 0;
+ }
+ if (ap->flags & ATA_FLAG_NCQ) {
+ hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
+ dev->flags |= ATA_DFLAG_NCQ;
+ }
+
+ if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
+ (ap->flags & ATA_FLAG_FPDMA_AA) &&
+ ata_id_has_fpdma_aa(dev->id)) {
+ err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
+ SATA_FPDMA_AA);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_ERR, "failed to enable AA"
+ "(error_mask=0x%x)\n", err_mask);
+ if (err_mask != AC_ERR_DEV) {
+ dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
+ return -EIO;
+ }
+ } else
+ aa_desc = ", AA";
+ }
+
+ if (hdepth >= ddepth)
+ snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
+ else
+ snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
+ ddepth, aa_desc);
+ return 0;
+}
+
+/**
+ * sata_print_link_status - Print SATA link status
+ * @link: SATA link to printk link status about
+ *
+ * This function prints link speed and status of a SATA link.
+ *
+ * LOCKING:
+ * None.
+ */
+static void sata_print_link_status(struct ata_link *link)
+{
+ u32 sstatus, scontrol, tmp;
+
+ if (sata_scr_read(link, SCR_STATUS, &sstatus))
+ return;
+ sata_scr_read(link, SCR_CONTROL, &scontrol);
+
+ if (ata_phys_link_online(link)) {
+ tmp = (sstatus >> 4) & 0xf;
+ ata_link_printk(link, KERN_INFO,
+ "SATA link up %s (SStatus %X SControl %X)\n",
+ sata_spd_string(tmp), sstatus, scontrol);
+ } else {
+ ata_link_printk(link, KERN_INFO,
+ "SATA link down (SStatus %X SControl %X)\n",
+ sstatus, scontrol);
+ }
+}
+
+/**
+ * sata_down_spd_limit - adjust SATA spd limit downward
+ * @link: Link to adjust SATA spd limit for
+ * @spd_limit: Additional limit
+ *
+ * Adjust SATA spd limit of @link downward. Note that this
+ * function only adjusts the limit. The change must be applied
+ * using sata_set_spd().
+ *
+ * If @spd_limit is non-zero, the speed is limited to equal to or
+ * lower than @spd_limit if such speed is supported. If
+ * @spd_limit is slower than any supported speed, only the lowest
+ * supported speed is allowed.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 0 on success, negative errno on failure
+ */
+int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
+{
+ u32 sstatus, spd, mask;
+ int rc, bit;
+
+ if (!sata_scr_valid(link))
+ return -EOPNOTSUPP;
+
+ /* If SCR can be read, use it to determine the current SPD.
+ * If not, use cached value in link->sata_spd.
+ */
+ rc = sata_scr_read(link, SCR_STATUS, &sstatus);
+ if (rc == 0 && ata_sstatus_online(sstatus))
+ spd = (sstatus >> 4) & 0xf;
+ else
+ spd = link->sata_spd;
+
+ mask = link->sata_spd_limit;
+ if (mask <= 1)
+ return -EINVAL;
+
+ /* unconditionally mask off the highest bit */
+ bit = fls(mask) - 1;
+ mask &= ~(1 << bit);
+
+ /* Mask off all speeds higher than or equal to the current
+ * one. Force 1.5Gbps if current SPD is not available.
+ */
+ if (spd > 1)
+ mask &= (1 << (spd - 1)) - 1;
+ else
+ mask &= 1;
+
+ /* were we already at the bottom? */
+ if (!mask)
+ return -EINVAL;
+
+ if (spd_limit) {
+ if (mask & ((1 << spd_limit) - 1))
+ mask &= (1 << spd_limit) - 1;
+ else {
+ bit = ffs(mask) - 1;
+ mask = 1 << bit;
+ }
+ }
+
+ link->sata_spd_limit = mask;
+
+ ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
+ sata_spd_string(fls(mask)));
+
+ return 0;
+}
+
+static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
+{
+ struct ata_link *host_link = &link->ap->link;
+ u32 limit, target, spd;
+
+ limit = link->sata_spd_limit;
+
+ /* Don't configure downstream link faster than upstream link.
+ * It doesn't speed up anything and some PMPs choke on such
+ * configuration.
+ */
+ if (!ata_is_host_link(link) && host_link->sata_spd)
+ limit &= (1 << host_link->sata_spd) - 1;
+
+ if (limit == UINT_MAX)
+ target = 0;
+ else
+ target = fls(limit);
+
+ spd = (*scontrol >> 4) & 0xf;
+ *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
+
+ return spd != target;
+}
+
+/**
+ * sata_set_spd_needed - is SATA spd configuration needed
+ * @link: Link in question
+ *
+ * Test whether the spd limit in SControl matches
+ * @link->sata_spd_limit. This function is used to determine
+ * whether hardreset is necessary to apply SATA spd
+ * configuration.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 1 if SATA spd configuration is needed, 0 otherwise.
+ */
+static int sata_set_spd_needed(struct ata_link *link)
+{
+ u32 scontrol;
+
+ if (sata_scr_read(link, SCR_CONTROL, &scontrol))
+ return 1;
+
+ return __sata_set_spd_needed(link, &scontrol);
+}
+
+/**
+ * sata_set_spd - set SATA spd according to spd limit
+ * @link: Link to set SATA spd for
+ *
+ * Set SATA spd of @link according to sata_spd_limit.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 0 if spd doesn't need to be changed, 1 if spd has been
+ * changed. Negative errno if SCR registers are inaccessible.
+ */
+int sata_set_spd(struct ata_link *link)
+{
+ u32 scontrol;
+ int rc;
+
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ return rc;
+
+ if (!__sata_set_spd_needed(link, &scontrol))
+ return 0;
+
+ if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
+ return rc;
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(sata_set_spd);
+
+/**
+ * sata_link_debounce - debounce SATA phy status
+ * @link: ATA link to debounce SATA phy status for
+ * @params: timing parameters { interval, duratinon, timeout } in msec
+ * @deadline: deadline jiffies for the operation
+ *
+ * Make sure SStatus of @link reaches stable state, determined by
+ * holding the same value where DET is not 1 for @duration polled
+ * every @interval, before @timeout. Timeout constraints the
+ * beginning of the stable state. Because DET gets stuck at 1 on
+ * some controllers after hot unplugging, this functions waits
+ * until timeout then returns 0 if DET is stable at 1.
+ *
+ * @timeout is further limited by @deadline. The sooner of the
+ * two is used.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int sata_link_debounce(struct ata_link *link, const unsigned long *params,
+ unsigned long deadline)
+{
+ unsigned long interval = params[0];
+ unsigned long duration = params[1];
+ unsigned long last_jiffies, t;
+ u32 last, cur;
+ int rc;
+
+ t = ata_deadline(jiffies, params[2]);
+ if (time_before(t, deadline))
+ deadline = t;
+
+ if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
+ return rc;
+ cur &= 0xf;
+
+ last = cur;
+ last_jiffies = jiffies;
+
+ while (1) {
+ ata_msleep(link->ap, interval);
+ if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
+ return rc;
+ cur &= 0xf;
+
+ /* DET stable? */
+ if (cur == last) {
+ if (cur == 1 && time_before(jiffies, deadline))
+ continue;
+ if (time_after(jiffies,
+ ata_deadline(last_jiffies, duration)))
+ return 0;
+ continue;
+ }
+
+ /* unstable, start over */
+ last = cur;
+ last_jiffies = jiffies;
+
+ /* Check deadline. If debouncing failed, return
+ * -EPIPE to tell upper layer to lower link speed.
+ */
+ if (time_after(jiffies, deadline))
+ return -EPIPE;
+ }
+}
+EXPORT_SYMBOL_GPL(sata_link_debounce);
+
+/**
+ * sata_link_resume - resume SATA link
+ * @link: ATA link to resume SATA
+ * @params: timing parameters { interval, duratinon, timeout } in msec
+ * @deadline: deadline jiffies for the operation
+ *
+ * Resume SATA phy @link and debounce it.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int sata_link_resume(struct ata_link *link, const unsigned long *params,
+ unsigned long deadline)
+{
+ int tries = ATA_LINK_RESUME_TRIES;
+ u32 scontrol, serror;
+ int rc;
+
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ return rc;
+
+ /*
+ * Writes to SControl sometimes get ignored under certain
+ * controllers (ata_piix SIDPR). Make sure DET actually is
+ * cleared.
+ */
+ do {
+ scontrol = (scontrol & 0x0f0) | 0x300;
+ if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
+ return rc;
+ /*
+ * Some PHYs react badly if SStatus is pounded
+ * immediately after resuming. Delay 200ms before
+ * debouncing.
+ */
+ ata_msleep(link->ap, 200);
+
+ /* is SControl restored correctly? */
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ return rc;
+ } while ((scontrol & 0xf0f) != 0x300 && --tries);
+
+ if ((scontrol & 0xf0f) != 0x300) {
+ ata_link_printk(link, KERN_ERR,
+ "failed to resume link (SControl %X)\n",
+ scontrol);
+ return 0;
+ }
+
+ if (tries < ATA_LINK_RESUME_TRIES)
+ ata_link_printk(link, KERN_WARNING,
+ "link resume succeeded after %d retries\n",
+ ATA_LINK_RESUME_TRIES - tries);
+
+ if ((rc = sata_link_debounce(link, params, deadline)))
+ return rc;
+
+ /* clear SError, some PHYs require this even for SRST to work */
+ if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
+ rc = sata_scr_write(link, SCR_ERROR, serror);
+
+ return rc != -EINVAL ? rc : 0;
+}
+EXPORT_SYMBOL_GPL(sata_link_resume);
+
+/**
+ * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
+ * @link: ATA link to manipulate SControl for
+ * @policy: LPM policy to configure
+ * @spm_wakeup: initiate LPM transition to active state
+ *
+ * Manipulate the IPM field of the SControl register of @link
+ * according to @policy. If @policy is ATA_LPM_MAX_POWER and
+ * @spm_wakeup is %true, the SPM field is manipulated to wake up
+ * the link. This function also clears PHYRDY_CHG before
+ * returning.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on succes, -errno otherwise.
+ */
+int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ bool spm_wakeup)
+{
+ struct ata_eh_context *ehc = &link->eh_context;
+ bool woken_up = false;
+ u32 scontrol;
+ int rc;
+
+ rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
+ if (rc)
+ return rc;
+
+ switch (policy) {
+ case ATA_LPM_MAX_POWER:
+ /* disable all LPM transitions */
+ scontrol |= (0x3 << 8);
+ /* initiate transition to active state */
+ if (spm_wakeup) {
+ scontrol |= (0x4 << 12);
+ woken_up = true;
+ }
+ break;
+ case ATA_LPM_MED_POWER:
+ /* allow LPM to PARTIAL */
+ scontrol &= ~(0x1 << 8);
+ scontrol |= (0x2 << 8);
+ break;
+ case ATA_LPM_MIN_POWER:
+ /* no restrictions on LPM transitions */
+ scontrol &= ~(0x3 << 8);
+ break;
+ default:
+ WARN_ON(1);
+ }
+
+ rc = sata_scr_write(link, SCR_CONTROL, scontrol);
+ if (rc)
+ return rc;
+
+ /* give the link time to transit out of LPM state */
+ if (woken_up)
+ msleep(10);
+
+ /* clear PHYRDY_CHG from SError */
+ ehc->i.serror &= ~SERR_PHYRDY_CHG;
+ return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
+}
+EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
+
+/**
+ * sata_link_hardreset - reset link via SATA phy reset
+ * @link: link to reset
+ * @timing: timing parameters { interval, duratinon, timeout } in msec
+ * @deadline: deadline jiffies for the operation
+ * @online: optional out parameter indicating link onlineness
+ * @check_ready: optional callback to check link readiness
+ *
+ * SATA phy-reset @link using DET bits of SControl register.
+ * After hardreset, link readiness is waited upon using
+ * ata_wait_ready() if @check_ready is specified. LLDs are
+ * allowed to not specify @check_ready and wait itself after this
+ * function returns. Device classification is LLD's
+ * responsibility.
+ *
+ * *@...ine is set to one iff reset succeeded and @link is online
+ * after reset.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
+ unsigned long deadline,
+ bool *online, int (*check_ready)(struct ata_link *))
+{
+ u32 scontrol;
+ int rc;
+
+ DPRINTK("ENTER\n");
+
+ if (online)
+ *online = false;
+
+ if (sata_set_spd_needed(link)) {
+ /* SATA spec says nothing about how to reconfigure
+ * spd. To be on the safe side, turn off phy during
+ * reconfiguration. This works for at least ICH7 AHCI
+ * and Sil3124.
+ */
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ goto out;
+
+ scontrol = (scontrol & 0x0f0) | 0x304;
+
+ if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
+ goto out;
+
+ sata_set_spd(link);
+ }
+
+ /* issue phy wake/reset */
+ if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
+ goto out;
+
+ scontrol = (scontrol & 0x0f0) | 0x301;
+
+ if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
+ goto out;
+
+ /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
+ * 10.4.2 says at least 1 ms.
+ */
+ ata_msleep(link->ap, 1);
+
+ /* bring link back */
+ rc = sata_link_resume(link, timing, deadline);
+ if (rc)
+ goto out;
+ /* if link is offline nothing more to do */
+ if (ata_phys_link_offline(link))
+ goto out;
+
+ /* Link is online. From this point, -ENODEV too is an error. */
+ if (online)
+ *online = true;
+
+ if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
+ /* If PMP is supported, we have to do follow-up SRST.
+ * Some PMPs don't send D2H Reg FIS after hardreset if
+ * the first port is empty. Wait only for
+ * ATA_TMOUT_PMP_SRST_WAIT.
+ */
+ if (check_ready) {
+ unsigned long pmp_deadline;
+
+ pmp_deadline = ata_deadline(jiffies,
+ ATA_TMOUT_PMP_SRST_WAIT);
+ if (time_after(pmp_deadline, deadline))
+ pmp_deadline = deadline;
+ ata_wait_ready(link, pmp_deadline, check_ready);
+ }
+ rc = -EAGAIN;
+ goto out;
+ }
+
+ rc = 0;
+ if (check_ready)
+ rc = ata_wait_ready(link, deadline, check_ready);
+ out:
+ if (rc && rc != -EAGAIN) {
+ /* online is set iff link is online && reset succeeded */
+ if (online)
+ *online = false;
+ ata_link_printk(link, KERN_ERR,
+ "COMRESET failed (errno=%d)\n", rc);
+ }
+ DPRINTK("EXIT, rc=%d\n", rc);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(sata_link_hardreset);
+
+/**
+ * sata_std_hardreset - COMRESET w/o waiting or classification
+ * @link: link to reset
+ * @class: resulting class of attached device
+ * @deadline: deadline jiffies for the operation
+ *
+ * Standard SATA COMRESET w/o waiting or classification.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 if link offline, -EAGAIN if link online, -errno on errors.
+ */
+int sata_std_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
+ bool online;
+ int rc;
+
+ /* do hardreset */
+ rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
+ return online ? -EAGAIN : rc;
+}
+EXPORT_SYMBOL_GPL(sata_std_hardreset);
+
+/**
+ * ata_std_postreset - standard postreset callback
+ * @link: the target ata_link
+ * @classes: classes of attached devices
+ *
+ * This function is invoked after a successful reset. Note that
+ * the device might have been reset more than once using
+ * different reset methods before postreset is invoked.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
+void ata_std_postreset(struct ata_link *link, unsigned int *classes)
+{
+ u32 serror;
+
+ DPRINTK("ENTER\n");
+
+ /* reset complete, clear SError */
+ if (!sata_scr_read(link, SCR_ERROR, &serror))
+ sata_scr_write(link, SCR_ERROR, serror);
+
+ /* print link status */
+ sata_print_link_status(link);
+
+ DPRINTK("EXIT\n");
+}
+EXPORT_SYMBOL_GPL(ata_std_postreset);
+
+/**
+ * sata_link_init_spd - Initialize link->sata_spd_limit
+ * @link: Link to configure sata_spd_limit for
+ *
+ * Initialize @link->[hw_]sata_spd_limit to the currently
+ * configured value.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int sata_link_init_spd(struct ata_link *link)
+{
+ u8 spd;
+ int rc;
+
+ rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
+ if (rc)
+ return rc;
+
+ spd = (link->saved_scontrol >> 4) & 0xf;
+ if (spd)
+ link->hw_sata_spd_limit &= (1 << spd) - 1;
+
+ ata_force_link_limits(link);
+
+ link->sata_spd_limit = link->hw_sata_spd_limit;
+
+ return 0;
+}
+
+/**
+ * sata_async_notification - SATA async notification handler
+ * @ap: ATA port where async notification is received
+ *
+ * Handler to be called when async notification via SDB FIS is
+ * received. This function schedules EH if necessary.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * 1 if EH is scheduled, 0 otherwise.
+ */
+int sata_async_notification(struct ata_port *ap)
+{
+ u32 sntf;
+ int rc;
+
+ if (!(ap->flags & ATA_FLAG_AN))
+ return 0;
+
+ rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
+ if (rc == 0)
+ sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
+
+ if (!sata_pmp_attached(ap) || rc) {
+ /* PMP is not attached or SNTF is not available */
+ if (!sata_pmp_attached(ap)) {
+ /* PMP is not attached. Check whether ATAPI
+ * AN is configured. If so, notify media
+ * change.
+ */
+ struct ata_device *dev = ap->link.device;
+
+ if ((dev->class == ATA_DEV_ATAPI) &&
+ (dev->flags & ATA_DFLAG_AN))
+ ata_scsi_media_change_notify(dev);
+ return 0;
+ } else {
+ /* PMP is attached but SNTF is not available.
+ * ATAPI async media change notification is
+ * not used. The PMP must be reporting PHY
+ * status change, schedule EH.
+ */
+ ata_port_schedule_eh(ap);
+ return 1;
+ }
+ } else {
+ /* PMP is attached and SNTF is available */
+ struct ata_link *link;
+
+ /* check and notify ATAPI AN */
+ ata_for_each_link(link, ap, EDGE) {
+ if (!(sntf & (1 << link->pmp)))
+ continue;
+
+ if ((link->device->class == ATA_DEV_ATAPI) &&
+ (link->device->flags & ATA_DFLAG_AN))
+ ata_scsi_media_change_notify(link->device);
+ }
+
+ /* If PMP is reporting that PHY status of some
+ * downstream ports has changed, schedule EH.
+ */
+ if (sntf & (1 << SATA_PMP_CTRL_PORT)) {
+ ata_port_schedule_eh(ap);
+ return 1;
+ }
+
+ return 0;
+ }
+}
+EXPORT_SYMBOL_GPL(sata_async_notification);
+
+/**
+ * ata_read_log_page - read a specific log page
+ * @dev: target device
+ * @page: page to read
+ * @buf: buffer to store read page
+ * @sectors: number of sectors to read
+ *
+ * Read log page using READ_LOG_EXT command.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, AC_ERR_* mask otherwise.
+ */
+static unsigned int ata_read_log_page(struct ata_device *dev,
+ u8 page, void *buf, unsigned int sectors)
+{
+ struct ata_taskfile tf;
+ unsigned int err_mask;
+
+ DPRINTK("read log page - page %d\n", page);
+
+ ata_tf_init(dev, &tf);
+ tf.command = ATA_CMD_READ_LOG_EXT;
+ tf.lbal = page;
+ tf.nsect = sectors;
+ tf.hob_nsect = sectors >> 8;
+ tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
+ tf.protocol = ATA_PROT_PIO;
+
+ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
+ buf, sectors * ATA_SECT_SIZE, 0);
+
+ DPRINTK("EXIT, err_mask=%x\n", err_mask);
+ return err_mask;
+}
+
+/**
+ * ata_eh_read_log_10h - Read log page 10h for NCQ error details
+ * @dev: Device to read log page 10h from
+ * @tag: Resulting tag of the failed command
+ * @tf: Resulting taskfile registers of the failed command
+ *
+ * Read log page 10h to obtain NCQ error details and clear error
+ * condition.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+static int ata_eh_read_log_10h(struct ata_device *dev,
+ int *tag, struct ata_taskfile *tf)
+{
+ u8 *buf = dev->link->ap->sector_buf;
+ unsigned int err_mask;
+ u8 csum;
+ int i;
+
+ err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1);
+ if (err_mask)
+ return -EIO;
+
+ csum = 0;
+ for (i = 0; i < ATA_SECT_SIZE; i++)
+ csum += buf[i];
+ if (csum)
+ ata_dev_printk(dev, KERN_WARNING,
+ "invalid checksum 0x%x on log page 10h\n", csum);
+
+ if (buf[0] & 0x80)
+ return -ENOENT;
+
+ *tag = buf[0] & 0x1f;
+
+ tf->command = buf[2];
+ tf->feature = buf[3];
+ tf->lbal = buf[4];
+ tf->lbam = buf[5];
+ tf->lbah = buf[6];
+ tf->device = buf[7];
+ tf->hob_lbal = buf[8];
+ tf->hob_lbam = buf[9];
+ tf->hob_lbah = buf[10];
+ tf->nsect = buf[12];
+ tf->hob_nsect = buf[13];
+
+ return 0;
+}
+
+/**
+ * ata_eh_analyze_serror - analyze SError for a failed port
+ * @link: ATA link to analyze SError for
+ *
+ * Analyze SError if available and further determine cause of
+ * failure.
+ *
+ * LOCKING:
+ * None.
+ */
+void ata_eh_analyze_serror(struct ata_link *link)
+{
+ struct ata_eh_context *ehc = &link->eh_context;
+ u32 serror = ehc->i.serror;
+ unsigned int err_mask = 0, action = 0;
+ u32 hotplug_mask;
+
+ if (serror & (SERR_PERSISTENT | SERR_DATA)) {
+ err_mask |= AC_ERR_ATA_BUS;
+ action |= ATA_EH_RESET;
+ }
+ if (serror & SERR_PROTOCOL) {
+ err_mask |= AC_ERR_HSM;
+ action |= ATA_EH_RESET;
+ }
+ if (serror & SERR_INTERNAL) {
+ err_mask |= AC_ERR_SYSTEM;
+ action |= ATA_EH_RESET;
+ }
+
+ /* Determine whether a hotplug event has occurred. Both
+ * SError.N/X are considered hotplug events for enabled or
+ * host links. For disabled PMP links, only N bit is
+ * considered as X bit is left at 1 for link plugging.
+ */
+ if (link->lpm_policy != ATA_LPM_MAX_POWER)
+ hotplug_mask = 0; /* hotplug doesn't work w/ LPM */
+ else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link))
+ hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG;
+ else
+ hotplug_mask = SERR_PHYRDY_CHG;
+
+ if (serror & hotplug_mask)
+ ata_ehi_hotplugged(&ehc->i);
+
+ ehc->i.err_mask |= err_mask;
+ ehc->i.action |= action;
+}
+
+/**
+ * ata_eh_analyze_ncq_error - analyze NCQ error
+ * @link: ATA link to analyze NCQ error for
+ *
+ * Read log page 10h, determine the offending qc and acquire
+ * error status TF. For NCQ device errors, all LLDDs have to do
+ * is setting AC_ERR_DEV in ehi->err_mask. This function takes
+ * care of the rest.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+void ata_eh_analyze_ncq_error(struct ata_link *link)
+{
+ struct ata_port *ap = link->ap;
+ struct ata_eh_context *ehc = &link->eh_context;
+ struct ata_device *dev = link->device;
+ struct ata_queued_cmd *qc;
+ struct ata_taskfile tf;
+ int tag, rc;
+
+ /* if frozen, we can't do much */
+ if (ap->pflags & ATA_PFLAG_FROZEN)
+ return;
+
+ /* is it NCQ device error? */
+ if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV))
+ return;
+
+ /* has LLDD analyzed already? */
+ for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
+ qc = __ata_qc_from_tag(ap, tag);
+
+ if (!(qc->flags & ATA_QCFLAG_FAILED))
+ continue;
+
+ if (qc->err_mask)
+ return;
+ }
+
+ /* okay, this error is ours */
+ memset(&tf, 0, sizeof(tf));
+ rc = ata_eh_read_log_10h(dev, &tag, &tf);
+ if (rc) {
+ ata_link_printk(link, KERN_ERR, "failed to read log page 10h "
+ "(errno=%d)\n", rc);
+ return;
+ }
+
+ if (!(link->sactive & (1 << tag))) {
+ ata_link_printk(link, KERN_ERR, "log page 10h reported "
+ "inactive tag %d\n", tag);
+ return;
+ }
+
+ /* we've got the perpetrator, condemn it */
+ qc = __ata_qc_from_tag(ap, tag);
+ memcpy(&qc->result_tf, &tf, sizeof(tf));
+ qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
+ qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ;
+ ehc->i.err_mask &= ~AC_ERR_DEV;
+}
+EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
+
+/**
+ * ata_eh_set_lpm - configure SATA interface power management
+ * @link: link to configure power management
+ * @policy: the link power management policy
+ * @r_failed_dev: out parameter for failed device
+ *
+ * Enable SATA Interface power management. This will enable
+ * Device Interface Power Management (DIPM) for min_power
+ * policy, and then call driver specific callbacks for
+ * enabling Host Initiated Power management.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ struct ata_device **r_failed_dev)
+{
+ struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL;
+ struct ata_eh_context *ehc = &link->eh_context;
+ struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL;
+ enum ata_lpm_policy old_policy = link->lpm_policy;
+ unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM;
+ unsigned int err_mask;
+ int rc;
+
+ /* if the link or host doesn't do LPM, noop */
+ if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm))
+ return 0;
+
+ /*
+ * DIPM is enabled only for MIN_POWER as some devices
+ * misbehave when the host NACKs transition to SLUMBER. Order
+ * device and link configurations such that the host always
+ * allows DIPM requests.
+ */
+ ata_for_each_dev(dev, link, ENABLED) {
+ bool hipm = ata_id_has_hipm(dev->id);
+ bool dipm = ata_id_has_dipm(dev->id);
+
+ /* find the first enabled and LPM enabled devices */
+ if (!link_dev)
+ link_dev = dev;
+
+ if (!lpm_dev && (hipm || dipm))
+ lpm_dev = dev;
+
+ hints &= ~ATA_LPM_EMPTY;
+ if (!hipm)
+ hints &= ~ATA_LPM_HIPM;
+
+ /* disable DIPM before changing link config */
+ if (policy != ATA_LPM_MIN_POWER && dipm) {
+ err_mask = ata_dev_set_feature(dev,
+ SETFEATURES_SATA_DISABLE, SATA_DIPM);
+ if (err_mask && err_mask != AC_ERR_DEV) {
+ ata_dev_printk(dev, KERN_WARNING,
+ "failed to disable DIPM, Emask 0x%x\n",
+ err_mask);
+ rc = -EIO;
+ goto fail;
+ }
+ }
+ }
+
+ if (ap) {
+ rc = ap->ops->set_lpm(link, policy, hints);
+ if (!rc && ap->slave_link)
+ rc = ap->ops->set_lpm(ap->slave_link, policy, hints);
+ } else
+ rc = sata_pmp_set_lpm(link, policy, hints);
+
+ /*
+ * Attribute link config failure to the first (LPM) enabled
+ * device on the link.
+ */
+ if (rc) {
+ if (rc == -EOPNOTSUPP) {
+ link->flags |= ATA_LFLAG_NO_LPM;
+ return 0;
+ }
+ dev = lpm_dev ? lpm_dev : link_dev;
+ goto fail;
+ }
+
+ /*
+ * Low level driver acked the transition. Issue DIPM command
+ * with the new policy set.
+ */
+ link->lpm_policy = policy;
+ if (ap && ap->slave_link)
+ ap->slave_link->lpm_policy = policy;
+
+ /* host config updated, enable DIPM if transitioning to MIN_POWER */
+ ata_for_each_dev(dev, link, ENABLED) {
+ if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) {
+ err_mask = ata_dev_set_feature(dev,
+ SETFEATURES_SATA_ENABLE, SATA_DIPM);
+ if (err_mask && err_mask != AC_ERR_DEV) {
+ ata_dev_printk(dev, KERN_WARNING,
+ "failed to enable DIPM, Emask 0x%x\n",
+ err_mask);
+ rc = -EIO;
+ goto fail;
+ }
+ }
+ }
+
+ return 0;
+
+fail:
+ /* restore the old policy */
+ link->lpm_policy = old_policy;
+ if (ap && ap->slave_link)
+ ap->slave_link->lpm_policy = old_policy;
+
+ /* if no device or only one more chance is left, disable LPM */
+ if (!dev || ehc->tries[dev->devno] <= 2) {
+ ata_link_printk(link, KERN_WARNING,
+ "disabling LPM on the link\n");
+ link->flags |= ATA_LFLAG_NO_LPM;
+ }
+ if (r_failed_dev)
+ *r_failed_dev = dev;
+ return rc;
+}
+
+#ifdef CONFIG_ATA_SFF
+/**
+ * sata_sff_hardreset - reset host port via SATA phy reset
+ * @link: link to reset
+ * @class: resulting class of attached device
+ * @deadline: deadline jiffies for the operation
+ *
+ * SATA phy-reset host port using DET bits of SControl register,
+ * wait for !BSY and classify the attached device.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ struct ata_eh_context *ehc = &link->eh_context;
+ const unsigned long *timing = sata_ehc_deb_timing(ehc);
+ bool online;
+ int rc;
+
+ rc = sata_link_hardreset(link, timing, deadline, &online,
+ ata_sff_check_ready);
+ if (online)
+ *class = ata_sff_dev_classify(link->device, 1, NULL);
+
+ DPRINTK("EXIT, class=%u\n", *class);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(sata_sff_hardreset);
+#endif
Index: b/drivers/ata/libata-sff.c
===================================================================
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -252,7 +252,7 @@ int ata_sff_busy_sleep(struct ata_port *
}
EXPORT_SYMBOL_GPL(ata_sff_busy_sleep);
-static int ata_sff_check_ready(struct ata_link *link)
+int ata_sff_check_ready(struct ata_link *link)
{
u8 status = link->ap->ops->sff_check_status(link->ap);
@@ -2061,38 +2061,14 @@ int ata_sff_softreset(struct ata_link *l
}
EXPORT_SYMBOL_GPL(ata_sff_softreset);
-/**
- * sata_sff_hardreset - reset host port via SATA phy reset
- * @link: link to reset
- * @class: resulting class of attached device
- * @deadline: deadline jiffies for the operation
- *
- * SATA phy-reset host port using DET bits of SControl register,
- * wait for !BSY and classify the attached device.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
+#ifndef CONFIG_SATA_HOST
int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
- struct ata_eh_context *ehc = &link->eh_context;
- const unsigned long *timing = sata_ehc_deb_timing(ehc);
- bool online;
- int rc;
-
- rc = sata_link_hardreset(link, timing, deadline, &online,
- ata_sff_check_ready);
- if (online)
- *class = ata_sff_dev_classify(link->device, 1, NULL);
-
- DPRINTK("EXIT, class=%u\n", *class);
- return rc;
+ return -EOPNOTSUPP;
}
EXPORT_SYMBOL_GPL(sata_sff_hardreset);
+#endif
/**
* ata_sff_postreset - SFF postreset callback
Index: b/drivers/ata/libata.h
===================================================================
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -53,6 +53,29 @@ enum {
ATA_DNXFER_QUIET = (1 << 31),
};
+static inline bool ata_sstatus_online(u32 sstatus)
+{
+ return (sstatus & 0xf) == 0x3;
+}
+
+struct ata_force_param {
+ const char *name;
+ unsigned int cbl;
+ int spd_limit;
+ unsigned long xfer_mask;
+ unsigned int horkage_on;
+ unsigned int horkage_off;
+ unsigned int lflags;
+};
+
+struct ata_force_ent {
+ int port;
+ int device;
+ struct ata_force_param param;
+};
+
+extern struct ata_force_ent *ata_force_tbl;
+extern int ata_force_tbl_size;
extern unsigned int ata_print_id;
extern int atapi_passthru16;
extern int libata_fua;
@@ -84,7 +107,6 @@ extern int ata_dev_reread_id(struct ata_
extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
unsigned int readid_flags);
extern int ata_dev_configure(struct ata_device *dev);
-extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
extern unsigned int ata_dev_set_feature(struct ata_device *dev,
u8 enable, u8 feature);
@@ -98,12 +120,37 @@ extern bool ata_phys_link_online(struct
extern bool ata_phys_link_offline(struct ata_link *link);
extern void ata_dev_init(struct ata_device *dev);
extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
-extern int sata_link_init_spd(struct ata_link *link);
extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
extern struct ata_port *ata_port_alloc(struct ata_host *host);
extern const char *sata_spd_string(unsigned int spd);
+/* libata-sata.c */
+#ifdef CONFIG_SATA_HOST
+int ata_do_link_spd_horkage(struct ata_device *dev);
+int ata_dev_config_ncq(struct ata_device *dev, char *desc, size_t desc_sz);
+int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
+int sata_link_init_spd(struct ata_link *link);
+void ata_eh_analyze_serror(struct ata_link *link);
+int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ struct ata_device **r_failed_dev);
+#else
+static inline int ata_do_link_spd_horkage(struct ata_device *dev) { return 0; }
+static inline int ata_dev_config_ncq(struct ata_device *dev,
+ char *desc, size_t desc_sz)
+{
+ desc[0] = '\0';
+ return 0;
+}
+static inline int sata_down_spd_limit(struct ata_link *link,
+ u32 spd_limit) { return 0; }
+static inline int sata_link_init_spd(struct ata_link *link) { return 0; }
+static inline void ata_eh_analyze_serror(struct ata_link *link) { }
+static inline int ata_eh_set_lpm(struct ata_link *link,
+ enum ata_lpm_policy policy,
+ struct ata_device **r_failed_dev) { return 0; }
+#endif
+
/* libata-acpi.c */
#ifdef CONFIG_ATA_ACPI
extern unsigned int ata_acpi_gtf_filter;
@@ -206,6 +253,7 @@ static inline int sata_pmp_attach(struct
/* libata-sff.c */
#ifdef CONFIG_ATA_SFF
+extern int ata_sff_check_ready(struct ata_link *link);
extern void ata_sff_flush_pio_task(struct ata_port *ap);
extern void ata_sff_port_init(struct ata_port *ap);
extern int ata_sff_init(void);
Index: b/include/linux/libata.h
===================================================================
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -931,15 +931,13 @@ struct ata_timing {
};
/*
- * Core layer - drivers/ata/libata-core.c
+ * SATA host - drivers/ata/libata-sata.c
*/
+#ifdef CONFIG_SATA_HOST
extern const unsigned long sata_deb_timing_normal[];
extern const unsigned long sata_deb_timing_hotplug[];
extern const unsigned long sata_deb_timing_long[];
-extern struct ata_port_operations ata_dummy_port_ops;
-extern const struct ata_port_info ata_dummy_port_info;
-
static inline const unsigned long *
sata_ehc_deb_timing(struct ata_eh_context *ehc)
{
@@ -949,24 +947,33 @@ sata_ehc_deb_timing(struct ata_eh_contex
return sata_deb_timing_normal;
}
+void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
+int sata_set_spd(struct ata_link *link);
+int sata_link_debounce(struct ata_link *link, const unsigned long *params,
+ unsigned long deadline);
+int sata_link_resume(struct ata_link *link, const unsigned long *params,
+ unsigned long deadline);
+int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
+ unsigned long deadline, bool *online,
+ int (*check_ready)(struct ata_link *));
+#endif
+
+/*
+ * Core layer - drivers/ata/libata-core.c
+ */
+extern struct ata_port_operations ata_dummy_port_ops;
+extern const struct ata_port_info ata_dummy_port_info;
+
static inline int ata_port_is_dummy(struct ata_port *ap)
{
return ap->ops == &ata_dummy_port_ops;
}
-extern int sata_set_spd(struct ata_link *link);
extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
int (*check_ready)(struct ata_link *link));
-extern int sata_link_debounce(struct ata_link *link,
- const unsigned long *params, unsigned long deadline);
-extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
- unsigned long deadline);
extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
bool spm_wakeup);
-extern int sata_link_hardreset(struct ata_link *link,
- const unsigned long *timing, unsigned long deadline,
- bool *online, int (*check_ready)(struct ata_link *));
extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
@@ -1015,7 +1022,6 @@ extern u32 ata_wait_register(struct ata_
extern int atapi_cmd_type(u8 opcode);
extern void ata_tf_to_fis(const struct ata_taskfile *tf,
u8 pmp, int is_cmd, u8 *fis);
-extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
unsigned long mwdma_mask, unsigned long udma_mask);
extern void ata_unpack_xfermask(unsigned long xfer_mask,
--
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