Merge tag 'for-5.7/libata-2020-03-29' of git://git.kernel.dk/linux-block

Pull libata updates from Jens Axboe:

 - Series from Bart, making the libata code smaller on PATA only setups.
   This is useful for smaller/embedded use cases, and will help us move
   some of those off drivers/ide.

 - Kill unused BPRINTK() (Hannes)

 - Add various Comet Lake ahci PCI ids (Kai-Heng, Mika)

 - Fix for a double scsi_host_put() in error handling (John)

 - Use scnprintf (Takashi)

 - Assign OF node to the SCSI device (Linus Walleij)

* tag 'for-5.7/libata-2020-03-29' of git://git.kernel.dk/linux-block: (36 commits)
  ata: make "libata.force" kernel parameter optional
  ata: move ata_eh_analyze_ncq_error() & co. to libata-sata.c
  ata: start separating SATA specific code from libata-eh.c
  ata: move ata_sas_*() to libata-sata.c
  ata: start separating SATA specific code from libata-scsi.c
  ata: move sata_deb_timing_*() to libata-sata.c
  ata: move ata_qc_complete_multiple() to libata-sata.c
  ata: move sata_link_hardreset() to libata-sata.c
  ata: move sata_link_{debounce,resume}() to libata-sata.c
  ata: move *sata_set_spd*() to libata-sata.c
  ata: move sata_scr_*() to libata-sata.c
  ata: start separating SATA specific code from libata-core.c
  ata: let compiler optimize out ata_eh_set_lpm() on non-SATA hosts
  ata: let compiler optimize out ata_dev_config_ncq() on non-SATA hosts
  ata: add CONFIG_SATA_HOST=n version of ata_ncq_enabled()
  ata: separate PATA timings code from libata-core.c
  ata: fix CodingStyle issues in PATA timings code
  ata: remove EXPORT_SYMBOL_GPL()s not used by modules
  ata: move EXPORT_SYMBOL_GPL()s close to exported code
  ata: optimize ata_scsi_rbuf[] size
  ...

16 files changed, 2065 insertions, 1857 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a6beb2c5a692..05ecdce1b702 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -34,6 +34,12 @@ if ATA
 config ATA_NONSTANDARD
        bool
 
+config SATA_HOST
+	bool
+
+config PATA_TIMINGS
+	bool
+
 config ATA_VERBOSE_ERROR
 	bool "Verbose ATA error reporting"
 	default y
@@ -45,9 +51,26 @@ config ATA_VERBOSE_ERROR
 
 	  If unsure, say Y.
 
+config ATA_FORCE
+	bool "\"libata.force=\" kernel parameter support" if EXPERT
+	default y
+	help
+	  This option adds support for "libata.force=" kernel parameter for
+	  forcing configuration settings.
+
+	  For further information, please read
+	  <file:Documentation/admin-guide/kernel-parameters.txt>.
+
+	  This option will enlarge the kernel by approx. 3KB. Disable it if
+	  kernel size is more important than ability to override the default
+	  configuration settings.
+
+	  If unsure, say Y.
+
 config ATA_ACPI
 	bool "ATA ACPI Support"
 	depends on ACPI
+	select PATA_TIMINGS
 	default y
 	help
 	  This option adds support for ATA-related ACPI objects.
@@ -73,6 +96,7 @@ config SATA_ZPODD
 
 config SATA_PMP
 	bool "SATA Port Multiplier support"
+	depends on SATA_HOST
 	default y
 	help
 	  This option adds support for SATA Port Multipliers
@@ -85,6 +109,7 @@ comment "Controllers with non-SFF native interface"
 config SATA_AHCI
 	tristate "AHCI SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for AHCI Serial ATA.
 
@@ -111,6 +136,7 @@ config SATA_MOBILE_LPM_POLICY
 
 config SATA_AHCI_PLATFORM
 	tristate "Platform AHCI SATA support"
+	select SATA_HOST
 	help
 	  This option enables support for Platform AHCI Serial ATA
 	  controllers.
@@ -121,6 +147,7 @@ config AHCI_BRCM
 	tristate "Broadcom AHCI SATA support"
 	depends on ARCH_BRCMSTB || BMIPS_GENERIC || ARCH_BCM_NSP || \
 		   ARCH_BCM_63XX
+	select SATA_HOST
 	help
 	  This option enables support for the AHCI SATA3 controller found on
 	  Broadcom SoC's.
@@ -130,6 +157,7 @@ config AHCI_BRCM
 config AHCI_DA850
 	tristate "DaVinci DA850 AHCI SATA support"
 	depends on ARCH_DAVINCI_DA850
+	select SATA_HOST
 	help
 	  This option enables support for the DaVinci DA850 SoC's
 	  onboard AHCI SATA.
@@ -139,6 +167,7 @@ config AHCI_DA850
 config AHCI_DM816
 	tristate "DaVinci DM816 AHCI SATA support"
 	depends on ARCH_OMAP2PLUS
+	select SATA_HOST
 	help
 	  This option enables support for the DaVinci DM816 SoC's
 	  onboard AHCI SATA controller.
@@ -148,6 +177,7 @@ config AHCI_DM816
 config AHCI_ST
 	tristate "ST AHCI SATA support"
 	depends on ARCH_STI
+	select SATA_HOST
 	help
 	  This option enables support for ST AHCI SATA controller.
 
@@ -157,6 +187,7 @@ config AHCI_IMX
 	tristate "Freescale i.MX AHCI SATA support"
 	depends on MFD_SYSCON && (ARCH_MXC || COMPILE_TEST)
 	depends on (HWMON && (THERMAL || !THERMAL_OF)) || !HWMON
+	select SATA_HOST
 	help
 	  This option enables support for the Freescale i.MX SoC's
 	  onboard AHCI SATA.
@@ -166,6 +197,7 @@ config AHCI_IMX
 config AHCI_CEVA
 	tristate "CEVA AHCI SATA support"
 	depends on OF
+	select SATA_HOST
 	help
 	  This option enables support for the CEVA AHCI SATA.
 	  It can be found on the Xilinx Zynq UltraScale+ MPSoC.
@@ -176,6 +208,7 @@ config AHCI_MTK
 	tristate "MediaTek AHCI SATA support"
 	depends on ARCH_MEDIATEK
 	select MFD_SYSCON
+	select SATA_HOST
 	help
 	  This option enables support for the MediaTek SoC's
 	  onboard AHCI SATA controller.
@@ -185,6 +218,7 @@ config AHCI_MTK
 config AHCI_MVEBU
 	tristate "Marvell EBU AHCI SATA support"
 	depends on ARCH_MVEBU
+	select SATA_HOST
 	help
 	  This option enables support for the Marvebu EBU SoC's
 	  onboard AHCI SATA.
@@ -203,6 +237,7 @@ config AHCI_OCTEON
 config AHCI_SUNXI
 	tristate "Allwinner sunxi AHCI SATA support"
 	depends on ARCH_SUNXI
+	select SATA_HOST
 	help
 	  This option enables support for the Allwinner sunxi SoC's
 	  onboard AHCI SATA.
@@ -212,6 +247,7 @@ config AHCI_SUNXI
 config AHCI_TEGRA
 	tristate "NVIDIA Tegra AHCI SATA support"
 	depends on ARCH_TEGRA
+	select SATA_HOST
 	help
 	  This option enables support for the NVIDIA Tegra SoC's
 	  onboard AHCI SATA.
@@ -221,12 +257,14 @@ config AHCI_TEGRA
 config AHCI_XGENE
 	tristate "APM X-Gene 6.0Gbps AHCI SATA host controller support"
 	depends on PHY_XGENE
+	select SATA_HOST
 	help
 	 This option enables support for APM X-Gene SoC SATA host controller.
 
 config AHCI_QORIQ
 	tristate "Freescale QorIQ AHCI SATA support"
 	depends on OF
+	select SATA_HOST
 	help
 	  This option enables support for the Freescale QorIQ AHCI SoC's
 	  onboard AHCI SATA.
@@ -236,6 +274,7 @@ config AHCI_QORIQ
 config SATA_FSL
 	tristate "Freescale 3.0Gbps SATA support"
 	depends on FSL_SOC
+	select SATA_HOST
 	help
 	  This option enables support for Freescale 3.0Gbps SATA controller.
 	  It can be found on MPC837x and MPC8315.
@@ -245,6 +284,7 @@ config SATA_FSL
 config SATA_GEMINI
 	tristate "Gemini SATA bridge support"
 	depends on ARCH_GEMINI || COMPILE_TEST
+	select SATA_HOST
 	default ARCH_GEMINI
 	help
 	  This enabled support for the FTIDE010 to SATA bridge
@@ -255,6 +295,7 @@ config SATA_GEMINI
 config SATA_AHCI_SEATTLE
 	tristate "AMD Seattle 6.0Gbps AHCI SATA host controller support"
 	depends on ARCH_SEATTLE
+	select SATA_HOST
 	help
 	 This option enables support for AMD Seattle SATA host controller.
 
@@ -263,12 +304,14 @@ config SATA_AHCI_SEATTLE
 config SATA_INIC162X
 	tristate "Initio 162x SATA support (Very Experimental)"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Initio 162x Serial ATA.
 
 config SATA_ACARD_AHCI
 	tristate "ACard AHCI variant (ATP 8620)"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Acard.
 
@@ -277,6 +320,7 @@ config SATA_ACARD_AHCI
 config SATA_SIL24
 	tristate "Silicon Image 3124/3132 SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Silicon Image 3124/3132 Serial ATA.
 
@@ -317,6 +361,7 @@ config PDC_ADMA
 config PATA_OCTEON_CF
 	tristate "OCTEON Boot Bus Compact Flash support"
 	depends on CAVIUM_OCTEON_SOC
+	select PATA_TIMINGS
 	help
 	  This option enables a polled compact flash driver for use with
 	  compact flash cards attached to the OCTEON boot bus.
@@ -326,6 +371,7 @@ config PATA_OCTEON_CF
 config SATA_QSTOR
 	tristate "Pacific Digital SATA QStor support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Pacific Digital Serial ATA QStor.
 
@@ -334,6 +380,7 @@ config SATA_QSTOR
 config SATA_SX4
 	tristate "Promise SATA SX4 support (Experimental)"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Promise Serial ATA SX4.
 
@@ -357,6 +404,7 @@ comment "SATA SFF controllers with BMDMA"
 config ATA_PIIX
 	tristate "Intel ESB, ICH, PIIX3, PIIX4 PATA/SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for ICH5/6/7/8 Serial ATA
 	  and support for PATA on the Intel ESB/ICH/PIIX3/PIIX4 series
@@ -368,6 +416,7 @@ config SATA_DWC
 	tristate "DesignWare Cores SATA support"
 	depends on DMADEVICES
 	select GENERIC_PHY
+	select SATA_HOST
 	help
 	  This option enables support for the on-chip SATA controller of the
 	  AppliedMicro processor 460EX.
@@ -398,6 +447,7 @@ config SATA_DWC_VDEBUG
 config SATA_HIGHBANK
 	tristate "Calxeda Highbank SATA support"
 	depends on ARCH_HIGHBANK || COMPILE_TEST
+	select SATA_HOST
 	help
 	  This option enables support for the Calxeda Highbank SoC's
 	  onboard SATA.
@@ -409,6 +459,7 @@ config SATA_MV
 	depends on PCI || ARCH_DOVE || ARCH_MV78XX0 || \
 		   ARCH_MVEBU || ARCH_ORION5X || COMPILE_TEST
 	select GENERIC_PHY
+	select SATA_HOST
 	help
 	  This option enables support for the Marvell Serial ATA family.
 	  Currently supports 88SX[56]0[48][01] PCI(-X) chips,
@@ -419,6 +470,7 @@ config SATA_MV
 config SATA_NV
 	tristate "NVIDIA SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for NVIDIA Serial ATA.
 
@@ -427,6 +479,7 @@ config SATA_NV
 config SATA_PROMISE
 	tristate "Promise SATA TX2/TX4 support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Promise Serial ATA TX2/TX4.
 
@@ -435,6 +488,7 @@ config SATA_PROMISE
 config SATA_RCAR
 	tristate "Renesas R-Car SATA support"
 	depends on ARCH_RENESAS || COMPILE_TEST
+	select SATA_HOST
 	help
 	  This option enables support for Renesas R-Car Serial ATA.
 
@@ -443,6 +497,7 @@ config SATA_RCAR
 config SATA_SIL
 	tristate "Silicon Image SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Silicon Image Serial ATA.
 
@@ -452,6 +507,7 @@ config SATA_SIS
 	tristate "SiS 964/965/966/180 SATA support"
 	depends on PCI
 	select PATA_SIS
+	select SATA_HOST
 	help
 	  This option enables support for SiS Serial ATA on
 	  SiS 964/965/966/180 and Parallel ATA on SiS 180.
@@ -462,6 +518,7 @@ config SATA_SIS
 config SATA_SVW
 	tristate "ServerWorks Frodo / Apple K2 SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Broadcom/Serverworks/Apple K2
 	  SATA support.
@@ -471,6 +528,7 @@ config SATA_SVW
 config SATA_ULI
 	tristate "ULi Electronics SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for ULi Electronics SATA.
 
@@ -479,6 +537,7 @@ config SATA_ULI
 config SATA_VIA
 	tristate "VIA SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for VIA Serial ATA.
 
@@ -487,6 +546,7 @@ config SATA_VIA
 config SATA_VITESSE
 	tristate "VITESSE VSC-7174 / INTEL 31244 SATA support"
 	depends on PCI
+	select SATA_HOST
 	help
 	  This option enables support for Vitesse VSC7174 and Intel 31244 Serial ATA.
 
@@ -497,6 +557,7 @@ comment "PATA SFF controllers with BMDMA"
 config PATA_ALI
 	tristate "ALi PATA support"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the ALi ATA interfaces
 	  found on the many ALi chipsets.
@@ -506,6 +567,7 @@ config PATA_ALI
 config PATA_AMD
 	tristate "AMD/NVidia PATA support"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the AMD and NVidia PATA
 	  interfaces found on the chipsets for Athlon/Athlon64.
@@ -540,6 +602,7 @@ config PATA_ATIIXP
 config PATA_ATP867X
 	tristate "ARTOP/Acard ATP867X PATA support"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for ARTOP/Acard ATP867X PATA
 	  controllers.
@@ -549,6 +612,7 @@ config PATA_ATP867X
 config PATA_BK3710
 	tristate "Palmchip BK3710 PATA support"
 	depends on ARCH_DAVINCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the integrated IDE controller on
 	  the TI DaVinci SoC.
@@ -558,6 +622,7 @@ config PATA_BK3710
 config PATA_CMD64X
 	tristate "CMD64x PATA support"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the CMD64x series chips
 	  except for the CMD640.
@@ -603,6 +668,7 @@ config PATA_CS5536
 config PATA_CYPRESS
 	tristate "Cypress CY82C693 PATA support (Very Experimental)"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the Cypress/Contaq CY82C693
 	  chipset found in some Alpha systems
@@ -621,6 +687,7 @@ config PATA_EFAR
 config PATA_EP93XX
 	tristate "Cirrus Logic EP93xx PATA support"
 	depends on ARCH_EP93XX
+	select PATA_TIMINGS
 	help
 	  This option enables support for the PATA controller in
 	  the Cirrus Logic EP9312 and EP9315 ARM CPU.
@@ -685,6 +752,7 @@ config PATA_HPT3X3_DMA
 config PATA_ICSIDE
 	tristate "Acorn ICS PATA support"
 	depends on ARM && ARCH_ACORN
+	select PATA_TIMINGS
 	help
 	  On Acorn systems, say Y here if you wish to use the ICS PATA
 	  interface card.  This is not required for ICS partition support.
@@ -693,6 +761,7 @@ config PATA_ICSIDE
 config PATA_IMX
 	tristate "PATA support for Freescale iMX"
 	depends on ARCH_MXC
+	select PATA_TIMINGS
 	help
 	  This option enables support for the PATA host available on Freescale
           iMX SoCs.
@@ -778,6 +847,7 @@ config PATA_NINJA32
 config PATA_NS87415
 	tristate "Nat Semi NS87415 PATA support"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the National Semiconductor
 	  NS87415 PCI-IDE controller.
@@ -902,6 +972,7 @@ config PATA_TRIFLEX
 config PATA_VIA
 	tristate "VIA PATA support"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the VIA PATA interfaces
 	  found on the many VIA chipsets.
@@ -935,6 +1006,7 @@ comment "PIO-only SFF controllers"
 config PATA_CMD640_PCI
 	tristate "CMD640 PCI PATA support (Experimental)"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the CMD640 PCI IDE
 	  interface chip. Only the primary channel is currently
@@ -1005,6 +1077,7 @@ config PATA_MPIIX
 config PATA_NS87410
 	tristate "Nat Semi NS87410 PATA support"
 	depends on PCI
+	select PATA_TIMINGS
 	help
 	  This option enables support for the National Semiconductor
 	  NS87410 PCI-IDE controller.
@@ -1085,6 +1158,7 @@ config PATA_RZ1000
 config PATA_SAMSUNG_CF
 	tristate "Samsung SoC PATA support"
 	depends on SAMSUNG_DEV_IDE
+	select PATA_TIMINGS
 	help
 	  This option enables basic support for Samsung's S3C/S5P board
 	  PATA controllers via the new ATA layer
@@ -1104,6 +1178,7 @@ comment "Generic fallback / legacy drivers"
 config PATA_ACPI
 	tristate "ACPI firmware driver for PATA"
 	depends on ATA_ACPI && ATA_BMDMA && PCI
+	select PATA_TIMINGS
 	help
 	  This option enables an ACPI method driver which drives
 	  motherboard PATA controller interfaces through the ACPI
@@ -1113,6 +1188,7 @@ config PATA_ACPI
 config ATA_GENERIC
 	tristate "Generic ATA support"
 	depends on PCI && ATA_BMDMA
+	select SATA_HOST
 	help
 	  This option enables support for generic BIOS configured
 	  ATA controllers via the new ATA layer
@@ -1122,6 +1198,7 @@ config ATA_GENERIC
 config PATA_LEGACY
 	tristate "Legacy ISA PATA support (Experimental)"
 	depends on (ISA || PCI)
+	select PATA_TIMINGS
 	help
 	  This option enables support for ISA/VLB/PCI bus legacy PATA
 	  ports and allows them to be accessed via the new ATA layer.
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index d8cc2e04a6c7..b8aebfb14e82 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -123,7 +123,9 @@ obj-$(CONFIG_PATA_LEGACY)	+= pata_legacy.o
 
 libata-y	:= libata-core.o libata-scsi.o libata-eh.o \
 	libata-transport.o libata-trace.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
 libata-$(CONFIG_SATA_ZPODD)	+= libata-zpodd.o
+libata-$(CONFIG_PATA_TIMINGS)	+= libata-pata-timings.o
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 11ea1aff40db..ad0185c8dcee 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -40,6 +40,7 @@
 enum {
 	AHCI_PCI_BAR_STA2X11	= 0,
 	AHCI_PCI_BAR_CAVIUM	= 0,
+	AHCI_PCI_BAR_LOONGSON	= 0,
 	AHCI_PCI_BAR_ENMOTUS	= 2,
 	AHCI_PCI_BAR_CAVIUM_GEN5	= 4,
 	AHCI_PCI_BAR_STANDARD	= 5,
@@ -245,6 +246,7 @@ static const struct ata_port_info ahci_port_info[] = {
 
 static const struct pci_device_id ahci_pci_tbl[] = {
 	/* Intel */
+	{ PCI_VDEVICE(INTEL, 0x06d6), board_ahci }, /* Comet Lake PCH-H RAID */
 	{ PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
 	{ PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
 	{ PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
@@ -401,6 +403,8 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	{ PCI_VDEVICE(INTEL, 0xa252), board_ahci }, /* Lewisburg RAID*/
 	{ PCI_VDEVICE(INTEL, 0xa256), board_ahci }, /* Lewisburg RAID*/
 	{ PCI_VDEVICE(INTEL, 0xa356), board_ahci }, /* Cannon Lake PCH-H RAID */
+	{ PCI_VDEVICE(INTEL, 0x06d7), board_ahci }, /* Comet Lake-H RAID */
+	{ PCI_VDEVICE(INTEL, 0xa386), board_ahci }, /* Comet Lake PCH-V RAID */
 	{ PCI_VDEVICE(INTEL, 0x0f22), board_ahci_mobile }, /* Bay Trail AHCI */
 	{ PCI_VDEVICE(INTEL, 0x0f23), board_ahci_mobile }, /* Bay Trail AHCI */
 	{ PCI_VDEVICE(INTEL, 0x22a3), board_ahci_mobile }, /* Cherry Tr. AHCI */
@@ -589,6 +593,9 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	/* Enmotus */
 	{ PCI_DEVICE(0x1c44, 0x8000), board_ahci },
 
+	/* Loongson */
+	{ PCI_VDEVICE(LOONGSON, 0x7a08), board_ahci },
+
 	/* Generic, PCI class code for AHCI */
 	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 	  PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
@@ -1680,6 +1687,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 			ahci_pci_bar = AHCI_PCI_BAR_CAVIUM;
 		if (pdev->device == 0xa084)
 			ahci_pci_bar = AHCI_PCI_BAR_CAVIUM_GEN5;
+	} else if (pdev->vendor == PCI_VENDOR_ID_LOONGSON) {
+		if (pdev->device == 0x7a08)
+			ahci_pci_bar = AHCI_PCI_BAR_LOONGSON;
 	}
 
 	/* acquire resources */
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 42c8728f6117..beca5f91bb4c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2,10 +2,6 @@
 /*
  *  libata-core.c - helper library for ATA
  *
- *  Maintained by:  Tejun Heo <tj@kernel.org>
- *    		    Please ALWAYS copy linux-ide@vger.kernel.org
- *		    on emails.
- *
  *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
  *  Copyright 2003-2004 Jeff Garzik
  *
@@ -22,6 +18,11 @@
  *	http://www.compactflash.org (CF)
  *	http://www.qic.org (QIC157 - Tape and DSC)
  *	http://www.ce-ata.org (CE-ATA: not supported)
+ *
+ * libata is essentially a library of internal helper functions for
+ * low-level ATA host controller drivers.  As such, the API/ABI is
+ * likely to change as new drivers are added and updated.
+ * Do not depend on ABI/API stability.
  */
 
 #include <linux/kernel.h>
@@ -56,6 +57,7 @@
 #include <linux/leds.h>
 #include <linux/pm_runtime.h>
 #include <linux/platform_device.h>
+#include <asm/setup.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/libata.h>
@@ -63,11 +65,6 @@
 #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,
@@ -82,6 +79,7 @@ const struct ata_port_operations sata_port_ops = {
 	.qc_defer		= ata_std_qc_defer,
 	.hardreset		= sata_std_hardreset,
 };
+EXPORT_SYMBOL_GPL(sata_port_ops);
 
 static unsigned int ata_dev_init_params(struct ata_device *dev,
 					u16 heads, u16 sectors);
@@ -91,14 +89,15 @@ static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
 
 atomic_t ata_print_id = ATOMIC_INIT(0);
 
+#ifdef CONFIG_ATA_FORCE
 struct ata_force_param {
 	const char	*name;
-	unsigned int	cbl;
-	int		spd_limit;
+	u8		cbl;
+	u8		spd_limit;
 	unsigned long	xfer_mask;
 	unsigned int	horkage_on;
 	unsigned int	horkage_off;
-	unsigned int	lflags;
+	u16		lflags;
 };
 
 struct ata_force_ent {
@@ -110,10 +109,11 @@ struct ata_force_ent {
 static struct ata_force_ent *ata_force_tbl;
 static int ata_force_tbl_size;
 
-static char ata_force_param_buf[PAGE_SIZE] __initdata;
+static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata;
 /* param_buf is thrown away after initialization, disallow read */
 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
+#endif
 
 static int atapi_enabled = 1;
 module_param(atapi_enabled, int, 0444);
@@ -224,6 +224,7 @@ struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
 
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(ata_link_next);
 
 /**
  *	ata_dev_next - device iteration helper
@@ -277,6 +278,7 @@ struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
 		goto next;
 	return dev;
 }
+EXPORT_SYMBOL_GPL(ata_dev_next);
 
 /**
  *	ata_dev_phys_link - find physical link for a device
@@ -303,6 +305,7 @@ struct ata_link *ata_dev_phys_link(struct ata_device *dev)
 	return ap->slave_link;
 }
 
+#ifdef CONFIG_ATA_FORCE
 /**
  *	ata_force_cbl - force cable type according to libata.force
  *	@ap: ATA port of interest
@@ -483,6 +486,11 @@ static void ata_force_horkage(struct ata_device *dev)
 			       fe->param.name);
 	}
 }
+#else
+static inline void ata_force_link_limits(struct ata_link *link) { }
+static inline void ata_force_xfermask(struct ata_device *dev) { }
+static inline void ata_force_horkage(struct ata_device *dev) { }
+#endif
 
 /**
  *	atapi_cmd_type - Determine ATAPI command type from SCSI opcode
@@ -521,79 +529,7 @@ int atapi_cmd_type(u8 opcode)
 		return ATAPI_MISC;
 	}
 }
-
-/**
- *	ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
- *	@tf: Taskfile to convert
- *	@pmp: Port multiplier port
- *	@is_cmd: This FIS is for command
- *	@fis: Buffer into which data will output
- *
- *	Converts a standard ATA taskfile to a Serial ATA
- *	FIS structure (Register - Host to Device).
- *
- *	LOCKING:
- *	Inherited from caller.
- */
-void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
-{
-	fis[0] = 0x27;			/* Register - Host to Device FIS */
-	fis[1] = pmp & 0xf;		/* Port multiplier number*/
-	if (is_cmd)
-		fis[1] |= (1 << 7);	/* bit 7 indicates Command FIS */
-
-	fis[2] = tf->command;
-	fis[3] = tf->feature;
-
-	fis[4] = tf->lbal;
-	fis[5] = tf->lbam;
-	fis[6] = tf->lbah;
-	fis[7] = tf->device;
-
-	fis[8] = tf->hob_lbal;
-	fis[9] = tf->hob_lbam;
-	fis[10] = tf->hob_lbah;
-	fis[11] = tf->hob_feature;
-
-	fis[12] = tf->nsect;
-	fis[13] = tf->hob_nsect;
-	fis[14] = 0;
-	fis[15] = tf->ctl;
-
-	fis[16] = tf->auxiliary & 0xff;
-	fis[17] = (tf->auxiliary >> 8) & 0xff;
-	fis[18] = (tf->auxiliary >> 16) & 0xff;
-	fis[19] = (tf->auxiliary >> 24) & 0xff;
-}
-
-/**
- *	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(atapi_cmd_type);
 
 static const u8 ata_rw_cmds[] = {
 	/* pio multi */
@@ -868,6 +804,7 @@ unsigned long ata_pack_xfermask(unsigned long pio_mask,
 		((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
 		((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
 }
+EXPORT_SYMBOL_GPL(ata_pack_xfermask);
 
 /**
  *	ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
@@ -923,6 +860,7 @@ u8 ata_xfer_mask2mode(unsigned long xfer_mask)
 			return ent->base + highbit - ent->shift;
 	return 0xff;
 }
+EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
 
 /**
  *	ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
@@ -946,6 +884,7 @@ unsigned long ata_xfer_mode2mask(u8 xfer_mode)
 				& ~((1 << ent->shift) - 1);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
 
 /**
  *	ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
@@ -968,6 +907,7 @@ int ata_xfer_mode2shift(unsigned long xfer_mode)
 			return ent->shift;
 	return -1;
 }
+EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
 
 /**
  *	ata_mode_string - convert xfer_mask to string
@@ -1014,6 +954,7 @@ const char *ata_mode_string(unsigned long xfer_mask)
 		return xfer_mode_str[highbit];
 	return "<n/a>";
 }
+EXPORT_SYMBOL_GPL(ata_mode_string);
 
 const char *sata_spd_string(unsigned int spd)
 {
@@ -1094,6 +1035,7 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
 	DPRINTK("unknown device\n");
 	return ATA_DEV_UNKNOWN;
 }
+EXPORT_SYMBOL_GPL(ata_dev_classify);
 
 /**
  *	ata_id_string - Convert IDENTIFY DEVICE page into string
@@ -1130,6 +1072,7 @@ void ata_id_string(const u16 *id, unsigned char *s,
 		len -= 2;
 	}
 }
+EXPORT_SYMBOL_GPL(ata_id_string);
 
 /**
  *	ata_id_c_string - Convert IDENTIFY DEVICE page into C string
@@ -1157,6 +1100,7 @@ void ata_id_c_string(const u16 *id, unsigned char *s,
 		p--;
 	*p = '\0';
 }
+EXPORT_SYMBOL_GPL(ata_id_c_string);
 
 static u64 ata_id_n_sectors(const u16 *id)
 {
@@ -1514,6 +1458,7 @@ unsigned long ata_id_xfermask(const u16 *id)
 
 	return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
 }
+EXPORT_SYMBOL_GPL(ata_id_xfermask);
 
 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
 {
@@ -1771,6 +1716,7 @@ unsigned int ata_pio_need_iordy(const struct ata_device *adev)
 		return 1;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
 
 /**
  *	ata_pio_mask_no_iordy	-	Return the non IORDY mask
@@ -1811,6 +1757,7 @@ unsigned int ata_do_dev_read_id(struct ata_device *dev,
 	return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
 				     id, sizeof(id[0]) * ATA_ID_WORDS, 0);
 }
+EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
 
 /**
  *	ata_dev_read_id - Read ID data from the specified device
@@ -2265,6 +2212,8 @@ static int ata_dev_config_ncq(struct ata_device *dev,
 		desc[0] = '\0';
 		return 0;
 	}
+	if (!IS_ENABLED(CONFIG_SATA_HOST))
+		return 0;
 	if (dev->horkage & ATA_HORKAGE_NONCQ) {
 		snprintf(desc, desc_sz, "NCQ (not used)");
 		return 0;
@@ -2783,6 +2732,7 @@ int ata_cable_40wire(struct ata_port *ap)
 {
 	return ATA_CBL_PATA40;
 }
+EXPORT_SYMBOL_GPL(ata_cable_40wire);
 
 /**
  *	ata_cable_80wire	-	return 80 wire cable type
@@ -2796,6 +2746,7 @@ int ata_cable_80wire(struct ata_port *ap)
 {
 	return ATA_CBL_PATA80;
 }
+EXPORT_SYMBOL_GPL(ata_cable_80wire);
 
 /**
  *	ata_cable_unknown	-	return unknown PATA cable.
@@ -2808,6 +2759,7 @@ int ata_cable_unknown(struct ata_port *ap)
 {
 	return ATA_CBL_PATA_UNK;
 }
+EXPORT_SYMBOL_GPL(ata_cable_unknown);
 
 /**
  *	ata_cable_ignore	-	return ignored PATA cable.
@@ -2820,6 +2772,7 @@ int ata_cable_ignore(struct ata_port *ap)
 {
 	return ATA_CBL_PATA_IGN;
 }
+EXPORT_SYMBOL_GPL(ata_cable_ignore);
 
 /**
  *	ata_cable_sata	-	return SATA cable type
@@ -2832,6 +2785,7 @@ int ata_cable_sata(struct ata_port *ap)
 {
 	return ATA_CBL_SATA;
 }
+EXPORT_SYMBOL_GPL(ata_cable_sata);
 
 /**
  *	ata_bus_probe - Reset and probe ATA bus
@@ -3014,6 +2968,7 @@ struct ata_device *ata_dev_pair(struct ata_device *adev)
 		return NULL;
 	return pair;
 }
+EXPORT_SYMBOL_GPL(ata_dev_pair);
 
 /**
  *	sata_down_spd_limit - adjust SATA spd limit downward
@@ -3095,252 +3050,7 @@ int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
 	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
- */
-/*
- * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
- * These were taken from ATA/ATAPI-6 standard, rev 0a, except
- * for UDMA6, which is currently supported only by Maxtor drives.
- *
- * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.