From 5433f0e7427ae4f5b128d89ec16ccaafc9fef5ee Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Thu, 2 May 2024 11:26:53 +0200
Subject: ata: Kconfig: Update SATA_MOBILE_LPM_POLICY default to
 med_power_with_dipm

Historically this was set to "keep_firmware_settings" to prevent problems
with power management on very old drives. However it's been observed that
almost all modern Linux distributions either set the policy to
"med_power_with_dipm" in the kernel configuration or update it to this via
userspace policy changes. Update the policy default in the kernel to
"med_power_with_dipm" to match that behavior as well.

Changing the default was previously not a good idea, because LPM disables
detection of hot plug removals, however, since commit ae1f3db006b7 ("ata:
ahci: do not enable LPM on external ports"), a port marked as external
will always be initialized to "keep_firmware_settings", regardless of the
SATA_MOBILE_LPM_POLICY Kconfig value. Therefore, changing the default is
now considered safe (external ports included).

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
[cassel: rebased and reworded commit message]
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index b595494ab9b4..e00536b49552 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -118,7 +118,7 @@ config SATA_AHCI
 config SATA_MOBILE_LPM_POLICY
 	int "Default SATA Link Power Management policy"
 	range 0 4
-	default 0
+	default 3
 	depends on SATA_AHCI
 	help
 	  Select the Default SATA Link Power Management (LPM) policy to use
-- 
cgit v1.2.3


From 38dab832c3f4154968f95b267a3bb789e87554b0 Mon Sep 17 00:00:00 2001
From: Igor Pylypiv <ipylypiv@google.com>
Date: Tue, 2 Jul 2024 02:47:29 +0000
Subject: ata: libata-scsi: Fix offsets for the fixed format sense data
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Correct the ATA PASS-THROUGH fixed format sense data offsets to conform
to SPC-6 and SAT-5 specifications. Additionally, set the VALID bit to
indicate that the INFORMATION field contains valid information.

INFORMATION
===========

SAT-5 Table 212 — "Fixed format sense data INFORMATION field for the ATA
PASS-THROUGH commands" defines the following format:

+------+------------+
| Byte |   Field    |
+------+------------+
|    0 | ERROR      |
|    1 | STATUS     |
|    2 | DEVICE     |
|    3 | COUNT(7:0) |
+------+------------+

SPC-6 Table 48 - "Fixed format sense data" specifies that the INFORMATION
field starts at byte 3 in sense buffer resulting in the following offsets
for the ATA PASS-THROUGH commands:

+------------+-------------------------+
|   Field    |  Offset in sense buffer |
+------------+-------------------------+
| ERROR      |  3                      |
| STATUS     |  4                      |
| DEVICE     |  5                      |
| COUNT(7:0) |  6                      |
+------------+-------------------------+

COMMAND-SPECIFIC INFORMATION
============================

SAT-5 Table 213 - "Fixed format sense data COMMAND-SPECIFIC INFORMATION
field for ATA PASS-THROUGH" defines the following format:

+------+-------------------+
| Byte |        Field      |
+------+-------------------+
|    0 | FLAGS | LOG INDEX |
|    1 | LBA (7:0)         |
|    2 | LBA (15:8)        |
|    3 | LBA (23:16)       |
+------+-------------------+

SPC-6 Table 48 - "Fixed format sense data" specifies that
the COMMAND-SPECIFIC-INFORMATION field starts at byte 8
in sense buffer resulting in the following offsets for
the ATA PASS-THROUGH commands:

Offsets of these fields in the fixed sense format are as follows:

+-------------------+-------------------------+
|       Field       |  Offset in sense buffer |
+-------------------+-------------------------+
| FLAGS | LOG INDEX |  8                      |
| LBA (7:0)         |  9                      |
| LBA (15:8)        |  10                     |
| LBA (23:16)       |  11                     |
+-------------------+-------------------------+

Reported-by: Akshat Jain <akshatzen@google.com>
Fixes: 11093cb1ef56 ("libata-scsi: generate correct ATA pass-through sense")
Cc: stable@vger.kernel.org
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240702024735.1152293-2-ipylypiv@google.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-scsi.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index cdf29b178ddc..a0c68b0a00c4 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -855,7 +855,6 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	struct ata_taskfile *tf = &qc->result_tf;
 	unsigned char *sb = cmd->sense_buffer;
-	unsigned char *desc = sb + 8;
 	u8 sense_key, asc, ascq;
 
 	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
@@ -877,7 +876,8 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 		scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
 	}
 
-	if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
+	if ((sb[0] & 0x7f) >= 0x72) {
+		unsigned char *desc;
 		u8 len;
 
 		/* descriptor format */
@@ -916,21 +916,21 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 		}
 	} else {
 		/* Fixed sense format */
-		desc[0] = tf->error;
-		desc[1] = tf->status;
-		desc[2] = tf->device;
-		desc[3] = tf->nsect;
-		desc[7] = 0;
+		sb[0] |= 0x80;
+		sb[3] = tf->error;
+		sb[4] = tf->status;
+		sb[5] = tf->device;
+		sb[6] = tf->nsect;
 		if (tf->flags & ATA_TFLAG_LBA48)  {
-			desc[8] |= 0x80;
+			sb[8] |= 0x80;
 			if (tf->hob_nsect)
-				desc[8] |= 0x40;
+				sb[8] |= 0x40;
 			if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
-				desc[8] |= 0x20;
+				sb[8] |= 0x20;
 		}
-		desc[9] = tf->lbal;
-		desc[10] = tf->lbam;
-		desc[11] = tf->lbah;
+		sb[9] = tf->lbal;
+		sb[10] = tf->lbam;
+		sb[11] = tf->lbah;
 	}
 }
 
-- 
cgit v1.2.3


From 97981926224afe17ba3e22e0c2b7dd8b516ee574 Mon Sep 17 00:00:00 2001
From: Igor Pylypiv <ipylypiv@google.com>
Date: Tue, 2 Jul 2024 02:47:30 +0000
Subject: ata: libata-scsi: Do not overwrite valid sense data when CK_COND=1

Current ata_gen_passthru_sense() code performs two actions:
1. Generates sense data based on the ATA 'status' and ATA 'error' fields.
2. Populates "ATA Status Return sense data descriptor" / "Fixed format
   sense data" with ATA taskfile fields.

The problem is that #1 generates sense data even when a valid sense data
is already present (ATA_QCFLAG_SENSE_VALID is set). Factoring out #2 into
a separate function allows us to generate sense data only when there is
no valid sense data (ATA_QCFLAG_SENSE_VALID is not set).

As a bonus, we can now delete a FIXME comment in atapi_qc_complete()
which states that we don't want to translate taskfile registers into
sense descriptors for ATAPI.

Additionally, always set SAM_STAT_CHECK_CONDITION when CK_COND=1 because
SAT specification mandates that SATL shall return CHECK CONDITION if
the CK_COND bit is set.

The ATA PASS-THROUGH handling logic in ata_scsi_qc_complete() is hard
to read/understand. Improve the readability of the code by moving checks
into self-explanatory boolean variables.

Cc: stable@vger.kernel.org # 4.19+
Co-developed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240702024735.1152293-3-ipylypiv@google.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-scsi.c | 169 +++++++++++++++++++++++++---------------------
 1 file changed, 92 insertions(+), 77 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a0c68b0a00c4..a9d2a1cf4c3d 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -230,6 +230,80 @@ void ata_scsi_set_sense_information(struct ata_device *dev,
 				   SCSI_SENSE_BUFFERSIZE, information);
 }
 
+/**
+ *	ata_scsi_set_passthru_sense_fields - Set ATA fields in sense buffer
+ *	@qc: ATA PASS-THROUGH command.
+ *
+ *	Populates "ATA Status Return sense data descriptor" / "Fixed format
+ *	sense data" with ATA taskfile fields.
+ *
+ *	LOCKING:
+ *	None.
+ */
+static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc)
+{
+	struct scsi_cmnd *cmd = qc->scsicmd;
+	struct ata_taskfile *tf = &qc->result_tf;
+	unsigned char *sb = cmd->sense_buffer;
+
+	if ((sb[0] & 0x7f) >= 0x72) {
+		unsigned char *desc;
+		u8 len;
+
+		/* descriptor format */
+		len = sb[7];
+		desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
+		if (!desc) {
+			if (SCSI_SENSE_BUFFERSIZE < len + 14)
+				return;
+			sb[7] = len + 14;
+			desc = sb + 8 + len;
+		}
+		desc[0] = 9;
+		desc[1] = 12;
+		/*
+		 * Copy registers into sense buffer.
+		 */
+		desc[2] = 0x00;
+		desc[3] = tf->error;
+		desc[5] = tf->nsect;
+		desc[7] = tf->lbal;
+		desc[9] = tf->lbam;
+		desc[11] = tf->lbah;
+		desc[12] = tf->device;
+		desc[13] = tf->status;
+
+		/*
+		 * Fill in Extend bit, and the high order bytes
+		 * if applicable.
+		 */
+		if (tf->flags & ATA_TFLAG_LBA48) {
+			desc[2] |= 0x01;
+			desc[4] = tf->hob_nsect;
+			desc[6] = tf->hob_lbal;
+			desc[8] = tf->hob_lbam;
+			desc[10] = tf->hob_lbah;
+		}
+	} else {
+		/* Fixed sense format */
+		sb[0] |= 0x80;
+		sb[3] = tf->error;
+		sb[4] = tf->status;
+		sb[5] = tf->device;
+		sb[6] = tf->nsect;
+		if (tf->flags & ATA_TFLAG_LBA48)  {
+			sb[8] |= 0x80;
+			if (tf->hob_nsect)
+				sb[8] |= 0x40;
+			if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
+				sb[8] |= 0x20;
+		}
+		sb[9] = tf->lbal;
+		sb[10] = tf->lbam;
+		sb[11] = tf->lbah;
+	}
+}
+
 static void ata_scsi_set_invalid_field(struct ata_device *dev,
 				       struct scsi_cmnd *cmd, u16 field, u8 bit)
 {
@@ -837,10 +911,8 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
  *	ata_gen_passthru_sense - Generate check condition sense block.
  *	@qc: Command that completed.
  *
- *	This function is specific to the ATA descriptor format sense
- *	block specified for the ATA pass through commands.  Regardless
- *	of whether the command errored or not, return a sense
- *	block. Copy all controller registers into the sense
+ *	This function is specific to the ATA pass through commands.
+ *	Regardless of whether the command errored or not, return a sense
  *	block. If there was no error, we get the request from an ATA
  *	passthrough command, so we use the following sense data:
  *	sk = RECOVERED ERROR
@@ -875,63 +947,6 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 		 */
 		scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
 	}
-
-	if ((sb[0] & 0x7f) >= 0x72) {
-		unsigned char *desc;
-		u8 len;
-
-		/* descriptor format */
-		len = sb[7];
-		desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
-		if (!desc) {
-			if (SCSI_SENSE_BUFFERSIZE < len + 14)
-				return;
-			sb[7] = len + 14;
-			desc = sb + 8 + len;
-		}
-		desc[0] = 9;
-		desc[1] = 12;
-		/*
-		 * Copy registers into sense buffer.
-		 */
-		desc[2] = 0x00;
-		desc[3] = tf->error;
-		desc[5] = tf->nsect;
-		desc[7] = tf->lbal;
-		desc[9] = tf->lbam;
-		desc[11] = tf->lbah;
-		desc[12] = tf->device;
-		desc[13] = tf->status;
-
-		/*
-		 * Fill in Extend bit, and the high order bytes
-		 * if applicable.
-		 */
-		if (tf->flags & ATA_TFLAG_LBA48) {
-			desc[2] |= 0x01;
-			desc[4] = tf->hob_nsect;
-			desc[6] = tf->hob_lbal;
-			desc[8] = tf->hob_lbam;
-			desc[10] = tf->hob_lbah;
-		}
-	} else {
-		/* Fixed sense format */
-		sb[0] |= 0x80;
-		sb[3] = tf->error;
-		sb[4] = tf->status;
-		sb[5] = tf->device;
-		sb[6] = tf->nsect;
-		if (tf->flags & ATA_TFLAG_LBA48)  {
-			sb[8] |= 0x80;
-			if (tf->hob_nsect)
-				sb[8] |= 0x40;
-			if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
-				sb[8] |= 0x20;
-		}
-		sb[9] = tf->lbal;
-		sb[10] = tf->lbam;
-		sb[11] = tf->lbah;
-	}
 }
 
 /**
@@ -1632,26 +1647,32 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
 {
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	u8 *cdb = cmd->cmnd;
-	int need_sense = (qc->err_mask != 0) &&
-		!(qc->flags & ATA_QCFLAG_SENSE_VALID);
+	bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID;
+	bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12;
+	bool is_ck_cond_request = cdb[2] & 0x20;
+	bool is_error = qc->err_mask != 0;
 
 	/* For ATA pass thru (SAT) commands, generate a sense block if
 	 * user mandated it or if there's an error.  Note that if we
-	 * generate because the user forced us to [CK_COND =1], a check
+	 * generate because the user forced us to [CK_COND=1], a check
 	 * condition is generated and the ATA register values are returned
 	 * whether the command completed successfully or not. If there
-	 * was no error, we use the following sense data:
+	 * was no error, and CK_COND=1, we use the following sense data:
 	 * sk = RECOVERED ERROR
 	 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
 	 */
-	if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
-	    ((cdb[2] & 0x20) || need_sense))
-		ata_gen_passthru_sense(qc);
-	else if (need_sense)
+	if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) {
+		if (!have_sense)
+			ata_gen_passthru_sense(qc);
+		ata_scsi_set_passthru_sense_fields(qc);
+		if (is_ck_cond_request)
+			set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION);
+	} else if (is_error && !have_sense) {
 		ata_gen_ata_sense(qc);
-	else
+	} else {
 		/* Keep the SCSI ML and status byte, clear host byte. */
 		cmd->result &= 0x0000ffff;
+	}
 
 	ata_qc_done(qc);
 }
@@ -2590,14 +2611,8 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc)
 	/* handle completion from EH */
 	if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) {
 
-		if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
-			/* FIXME: not quite right; we don't want the
-			 * translation of taskfile registers into a
-			 * sense descriptors, since that's only
-			 * correct for ATA, not ATAPI
-			 */
+		if (!(qc->flags & ATA_QCFLAG_SENSE_VALID))
 			ata_gen_passthru_sense(qc);
-		}
 
 		/* SCSI EH automatically locks door if sdev->locked is
 		 * set.  Sometimes door lock request continues to
-- 
cgit v1.2.3


From 28ab9769117ca944cb6eb537af5599aa436287a4 Mon Sep 17 00:00:00 2001
From: Igor Pylypiv <ipylypiv@google.com>
Date: Tue, 2 Jul 2024 02:47:31 +0000
Subject: ata: libata-scsi: Honor the D_SENSE bit for CK_COND=1 and no error

SAT-5 revision 8 specification removed the text about the ANSI INCITS
431-2007 compliance which was requiring SCSI/ATA Translation (SAT) to
return descriptor format sense data for the ATA PASS-THROUGH commands
regardless of the setting of the D_SENSE bit.

Let's honor the D_SENSE bit for ATA PASS-THROUGH commands while
generating the "ATA PASS-THROUGH INFORMATION AVAILABLE" sense data.

SAT-5 revision 7
================

12.2.2.8 Fixed format sense data

Table 212 shows the fields returned in the fixed format sense data
(see SPC-5) for ATA PASS-THROUGH commands. SATLs compliant with ANSI
INCITS 431-2007, SCSI/ATA Translation (SAT) return descriptor format
sense data for the ATA PASS-THROUGH commands regardless of the setting
of the D_SENSE bit.

SAT-5 revision 8
================

12.2.2.8 Fixed format sense data

Table 211 shows the fields returned in the fixed format sense data
(see SPC-5) for ATA PASS-THROUGH commands.

Cc: stable@vger.kernel.org # 4.19+
Reported-by: Niklas Cassel <cassel@kernel.org>
Closes: https://lore.kernel.org/linux-ide/Zn1WUhmLglM4iais@ryzen.lan
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20240702024735.1152293-4-ipylypiv@google.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-scsi.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a9d2a1cf4c3d..fdc2a3b59fc1 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -941,11 +941,8 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 				   &sense_key, &asc, &ascq);
 		ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
 	} else {
-		/*
-		 * ATA PASS-THROUGH INFORMATION AVAILABLE
-		 * Always in descriptor format sense.
-		 */
-		scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
+		/* ATA PASS-THROUGH INFORMATION AVAILABLE */
+		ata_scsi_set_sense(qc->dev, cmd, RECOVERED_ERROR, 0, 0x1D);
 	}
 }
 
-- 
cgit v1.2.3


From 3f6d903b54a137e9e438d9c3b774b5d0432917bc Mon Sep 17 00:00:00 2001
From: Igor Pylypiv <ipylypiv@google.com>
Date: Tue, 2 Jul 2024 02:47:32 +0000
Subject: ata: libata-scsi: Remove redundant sense_buffer memsets

SCSI layer clears sense_buffer in scsi_queue_rq() so there is no need for
libata to clear it again.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240702024735.1152293-5-ipylypiv@google.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-scsi.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index fdc2a3b59fc1..01ba659d5f1b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -926,11 +926,8 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 {
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	struct ata_taskfile *tf = &qc->result_tf;
-	unsigned char *sb = cmd->sense_buffer;
 	u8 sense_key, asc, ascq;
 
-	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
-
 	/*
 	 * Use ata_to_sense_error() to map status register bits
 	 * onto sense key, asc & ascq.
@@ -965,8 +962,6 @@ static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
 	u64 block;
 	u8 sense_key, asc, ascq;
 
-	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
-
 	if (ata_dev_disabled(dev)) {
 		/* Device disabled after error recovery */
 		/* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
-- 
cgit v1.2.3


From ea3b26a9bb97082ced4686c830265da03db7c435 Mon Sep 17 00:00:00 2001
From: Igor Pylypiv <ipylypiv@google.com>
Date: Tue, 2 Jul 2024 02:47:33 +0000
Subject: ata: libata-scsi: Do not pass ATA device id to ata_to_sense_error()

ATA device id is not used in ata_to_sense_error().

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240702024735.1152293-6-ipylypiv@google.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-scsi.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 01ba659d5f1b..f922e3f96ad0 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -785,7 +785,6 @@ static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
 
 /**
  *	ata_to_sense_error - convert ATA error to SCSI error
- *	@id: ATA device number
  *	@drv_stat: value contained in ATA status register
  *	@drv_err: value contained in ATA error register
  *	@sk: the sense key we'll fill out
@@ -799,8 +798,8 @@ static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
  *	LOCKING:
  *	spin_lock_irqsave(host lock)
  */
-static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
-			       u8 *asc, u8 *ascq)
+static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
+			       u8 *ascq)
 {
 	int i;
 
@@ -934,7 +933,7 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 	 */
 	if (qc->err_mask ||
 	    tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
-		ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
+		ata_to_sense_error(tf->status, tf->error,
 				   &sense_key, &asc, &ascq);
 		ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
 	} else {
@@ -973,7 +972,7 @@ static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
 	 */
 	if (qc->err_mask ||
 	    tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
-		ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
+		ata_to_sense_error(tf->status, tf->error,
 				   &sense_key, &asc, &ascq);
 		ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
 	} else {
-- 
cgit v1.2.3


From 18676c6aab0863618eb35443e7b8615eea3535a9 Mon Sep 17 00:00:00 2001
From: Igor Pylypiv <ipylypiv@google.com>
Date: Tue, 2 Jul 2024 02:47:34 +0000
Subject: ata: libata-core: Set ATA_QCFLAG_RTF_FILLED in fill_result_tf()

ATA_QCFLAG_RTF_FILLED is not specific to ahci and can be used generally
to check if qc->result_tf contains valid data.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240702024735.1152293-7-ipylypiv@google.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libahci.c     | 12 ++----------
 drivers/ata/libata-core.c |  8 ++++++++
 2 files changed, 10 insertions(+), 10 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 83431aae74d8..fdfa7b266218 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -2075,13 +2075,6 @@ static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
 	struct ahci_port_priv *pp = qc->ap->private_data;
 	u8 *rx_fis = pp->rx_fis;
 
-	/*
-	 * rtf may already be filled (e.g. for successful NCQ commands).
-	 * If that is the case, we have nothing to do.
-	 */
-	if (qc->flags & ATA_QCFLAG_RTF_FILLED)
-		return;
-
 	if (pp->fbs_enabled)
 		rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
 
@@ -2095,7 +2088,6 @@ static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
 	    !(qc->flags & ATA_QCFLAG_EH)) {
 		ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
 		qc->result_tf.status = (rx_fis + RX_FIS_PIO_SETUP)[15];
-		qc->flags |= ATA_QCFLAG_RTF_FILLED;
 		return;
 	}
 
@@ -2118,12 +2110,10 @@ static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
 		 */
 		qc->result_tf.status = fis[2];
 		qc->result_tf.error = fis[3];
-		qc->flags |= ATA_QCFLAG_RTF_FILLED;
 		return;
 	}
 
 	ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
-	qc->flags |= ATA_QCFLAG_RTF_FILLED;
 }
 
 static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask)
@@ -2158,6 +2148,7 @@ static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask)
 			if (qc && ata_is_ncq(qc->tf.protocol)) {
 				qc->result_tf.status = status;
 				qc->result_tf.error = error;
+				qc->result_tf.flags = qc->tf.flags;
 				qc->flags |= ATA_QCFLAG_RTF_FILLED;
 			}
 			done_mask &= ~(1ULL << tag);
@@ -2182,6 +2173,7 @@ static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask)
 			fis += RX_FIS_SDB;
 			qc->result_tf.status = fis[2];
 			qc->result_tf.error = fis[3];
+			qc->result_tf.flags = qc->tf.flags;
 			qc->flags |= ATA_QCFLAG_RTF_FILLED;
 		}
 		done_mask &= ~(1ULL << tag);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4f35aab81a0a..45e3acb466c3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4794,8 +4794,16 @@ static void fill_result_tf(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 
+	/*
+	 * rtf may already be filled (e.g. for successful NCQ commands).
+	 * If that is the case, we have nothing to do.
+	 */
+	if (qc->flags & ATA_QCFLAG_RTF_FILLED)
+		return;
+
 	qc->result_tf.flags = qc->tf.flags;
 	ap->ops->qc_fill_rtf(qc);
+	qc->flags |= ATA_QCFLAG_RTF_FILLED;
 }
 
 static void ata_verify_xfer(struct ata_queued_cmd *qc)
-- 
cgit v1.2.3


From 816be86c7993d3c5832c3017c0056297e86f978c Mon Sep 17 00:00:00 2001
From: Igor Pylypiv <ipylypiv@google.com>
Date: Tue, 2 Jul 2024 02:47:35 +0000
Subject: ata: libata-scsi: Check ATA_QCFLAG_RTF_FILLED before using result_tf

qc->result_tf contents are only valid when the ATA_QCFLAG_RTF_FILLED flag
is set. The ATA_QCFLAG_RTF_FILLED flag should be always set for commands
that failed or for commands that have the ATA_QCFLAG_RESULT_TF flag set.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240702024735.1152293-8-ipylypiv@google.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-scsi.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index f922e3f96ad0..280034b3e04c 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -242,10 +242,17 @@ void ata_scsi_set_sense_information(struct ata_device *dev,
  */
 static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc)
 {
+	struct ata_device *dev = qc->dev;
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	struct ata_taskfile *tf = &qc->result_tf;
 	unsigned char *sb = cmd->sense_buffer;
 
+	if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) {
+		ata_dev_dbg(dev,
+			    "missing result TF: can't set ATA PT sense fields\n");
+		return;
+	}
+
 	if ((sb[0] & 0x7f) >= 0x72) {
 		unsigned char *desc;
 		u8 len;
@@ -923,10 +930,17 @@ static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
  */
 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 {
+	struct ata_device *dev = qc->dev;
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	struct ata_taskfile *tf = &qc->result_tf;
 	u8 sense_key, asc, ascq;
 
+	if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) {
+		ata_dev_dbg(dev,
+			    "missing result TF: can't generate ATA PT sense data\n");
+		return;
+	}
+
 	/*
 	 * Use ata_to_sense_error() to map status register bits
 	 * onto sense key, asc & ascq.
@@ -967,6 +981,13 @@ static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
 		ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
 		return;
 	}
+
+	if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) {
+		ata_dev_dbg(dev,
+			    "missing result TF: can't generate sense data\n");
+		return;
+	}
+
 	/* Use ata_to_sense_error() to map status register bits
 	 * onto sense key, asc & ascq.
 	 */
-- 
cgit v1.2.3


From c10bc5614ce0027fa2282ad11827629d81957a3a Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:18 +0200
Subject: ata,scsi: Remove wrappers ata_sas_tport_{add,delete}()

The ata_sas_tport_add() and ata_sas_tport_delete() wrappers only exist in
order to export the internal libata functions which they wrap.
Remove the wrappers and instead export the libata functions directly.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-12-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-sata.c      | 12 ------------
 drivers/ata/libata-transport.c |  2 ++
 drivers/ata/libata-transport.h |  3 ---
 3 files changed, 2 insertions(+), 15 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index 9e047bf912b1..e7991595bfe5 100644
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -1241,18 +1241,6 @@ struct ata_port *ata_sas_port_alloc(struct ata_host *host,
 }
 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
 
-int ata_sas_tport_add(struct device *parent, struct ata_port *ap)
-{
-	return ata_tport_add(parent, ap);
-}
-EXPORT_SYMBOL_GPL(ata_sas_tport_add);
-
-void ata_sas_tport_delete(struct ata_port *ap)
-{
-	ata_tport_delete(ap);
-}
-EXPORT_SYMBOL_GPL(ata_sas_tport_delete);
-
 /**
  *	ata_sas_device_configure - Default device_configure routine for libata
  *				   devices
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
index 3e49a877500e..d24f201c0ab2 100644
--- a/drivers/ata/libata-transport.c
+++ b/drivers/ata/libata-transport.c
@@ -265,6 +265,7 @@ void ata_tport_delete(struct ata_port *ap)
 	transport_destroy_device(dev);
 	put_device(dev);
 }
+EXPORT_SYMBOL_GPL(ata_tport_delete);
 
 static const struct device_type ata_port_sas_type = {
 	.name = ATA_PORT_TYPE_NAME,
@@ -329,6 +330,7 @@ int ata_tport_add(struct device *parent,
 	put_device(dev);
 	return error;
 }
+EXPORT_SYMBOL_GPL(ata_tport_add);
 
 /**
  *     ata_port_classify - determine device type based on ATA-spec signature
diff --git a/drivers/ata/libata-transport.h b/drivers/ata/libata-transport.h
index 08a57fb9dc61..50cd2cbe8eea 100644
--- a/drivers/ata/libata-transport.h
+++ b/drivers/ata/libata-transport.h
@@ -8,9 +8,6 @@ extern struct scsi_transport_template *ata_scsi_transport_template;
 int ata_tlink_add(struct ata_link *link);
 void ata_tlink_delete(struct ata_link *link);
 
-int ata_tport_add(struct device *parent, struct ata_port *ap);
-void ata_tport_delete(struct ata_port *ap);
-
 struct scsi_transport_template *ata_attach_transport(void);
 void ata_release_transport(struct scsi_transport_template *t);
 
-- 
cgit v1.2.3


From 23262cce529e9f437ce2fa8fe4c2fa5b2b182318 Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:20 +0200
Subject: ata: libata-core: Remove support for decreasing the number of ports

Commit f31871951b38 ("libata: separate out ata_host_alloc() and
ata_host_register()") added ata_host_alloc(), where the API allowed
a LLD to overallocate the number of ports supplied to ata_host_alloc(),
as long as the LLD decreased host->n_ports before calling
ata_host_register().

However, this functionally has never ever been used by a single LLD.

Because of the current API design, the assignment of ap->print_id is
deferred until registration time, which is bad, because that means that
the ata_port_*() print functions cannot be used by a LLD until after
registration time, which means that a LLD is forced to use a print
function that is non-port specific, even for a port specific error.

Remove the support for decreasing the number of ports, such that it will
be possible to assign ap->print_id earlier.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-14-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-core.c | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 949662bc50e4..d2d397964be4 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5555,24 +5555,19 @@ EXPORT_SYMBOL_GPL(ata_host_put);
 /**
  *	ata_host_alloc - allocate and init basic ATA host resources
  *	@dev: generic device this host is associated with
- *	@max_ports: maximum number of ATA ports associated with this host
+ *	@n_ports: the number of ATA ports associated with this host
  *
  *	Allocate and initialize basic ATA host resources.  LLD calls
  *	this function to allocate a host, initializes it fully and
  *	attaches it using ata_host_register().
  *
- *	@max_ports ports are allocated and host->n_ports is
- *	initialized to @max_ports.  The caller is allowed to decrease
- *	host->n_ports before calling ata_host_register().  The unused
- *	ports will be automatically freed on registration.
- *
  *	RETURNS:
  *	Allocate ATA host on success, NULL on failure.
  *
  *	LOCKING:
  *	Inherited from calling layer (may sleep).
  */
-struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
+struct ata_host *ata_host_alloc(struct device *dev, int n_ports)
 {
 	struct ata_host *host;
 	size_t sz;
@@ -5580,7 +5575,7 @@ struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
 	void *dr;
 
 	/* alloc a container for our list of ATA ports (buses) */
-	sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
+	sz = sizeof(struct ata_host) + n_ports * sizeof(void *);
 	host = kzalloc(sz, GFP_KERNEL);
 	if (!host)
 		return NULL;
@@ -5600,11 +5595,11 @@ struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
 	spin_lock_init(&host->lock);
 	mutex_init(&host->eh_mutex);
 	host->dev = dev;
-	host->n_ports = max_ports;
+	host->n_ports = n_ports;
 	kref_init(&host->kref);
 
 	/* allocate ports bound to this host */
-	for (i = 0; i < max_ports; i++) {
+	for (i = 0; i < n_ports; i++) {
 		struct ata_port *ap;
 
 		ap = ata_port_alloc(host);
@@ -5913,13 +5908,6 @@ int ata_host_register(struct ata_host *host, const struct scsi_host_template *sh
 		return -EINVAL;
 	}
 
-	/* Blow away unused ports.  This happens when LLD can't
-	 * determine the exact number of ports to allocate at
-	 * allocation time.
-	 */
-	for (i = host->n_ports; host->ports[i]; i++)
-		ata_port_free(host->ports[i]);
-
 	/* give ports names and add SCSI hosts */
 	for (i = 0; i < host->n_ports; i++) {
 		host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
-- 
cgit v1.2.3


From 6933eb8e50a3e4dc129095cb795261454476f111 Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:21 +0200
Subject: ata: libata-sata: Remove superfluous assignment in
 ata_sas_port_alloc()

ata_sas_port_alloc() calls ata_port_alloc() which already assigns ap->lock
so there is no need for ata_sas_port_alloc() to assign it again.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-15-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-sata.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index e7991595bfe5..1a36a5d1d7bc 100644
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -1228,7 +1228,6 @@ struct ata_port *ata_sas_port_alloc(struct ata_host *host,
 		return NULL;
 
 	ap->port_no = 0;
-	ap->lock = &host->lock;
 	ap->pio_mask = port_info->pio_mask;
 	ap->mwdma_mask = port_info->mwdma_mask;
 	ap->udma_mask = port_info->udma_mask;
-- 
cgit v1.2.3


From 1dd63a6b573ffb989ca618e60b6469f885454606 Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:22 +0200
Subject: ata: libata-core: Remove local_port_no struct member

ap->local_port_no is simply ap->port_no + 1.
Since ap->local_port_no can be derived from ap->port_no, there is no need
for the ap->local_port_no struct member, so remove ap->local_port_no.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-16-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-core.c      | 5 +----
 drivers/ata/libata-transport.c | 3 ++-
 2 files changed, 3 insertions(+), 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d2d397964be4..68a75483822e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5471,7 +5471,6 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 	ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
 	ap->lock = &host->lock;
 	ap->print_id = -1;
-	ap->local_port_no = -1;
 	ap->host = host;
 	ap->dev = host->dev;
 
@@ -5909,10 +5908,8 @@ int ata_host_register(struct ata_host *host, const struct scsi_host_template *sh
 	}
 
 	/* give ports names and add SCSI hosts */
-	for (i = 0; i < host->n_ports; i++) {
+	for (i = 0; i < host->n_ports; i++)
 		host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
-		host->ports[i]->local_port_no = i + 1;
-	}
 
 	/* Create associated sysfs transport objects  */
 	for (i = 0; i < host->n_ports; i++) {
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
index d24f201c0ab2..9e24c33388f9 100644
--- a/drivers/ata/libata-transport.c
+++ b/drivers/ata/libata-transport.c
@@ -217,7 +217,8 @@ static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
 
 ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
 ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
-ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int);
+/* We want the port_no sysfs attibute to start at 1 (ap->port_no starts at 0) */
+ata_port_simple_attr(port_no + 1, port_no, "%u\n", unsigned int);
 
 static DECLARE_TRANSPORT_CLASS(ata_port_class,
 			       "ata_port", NULL, NULL, NULL);
-- 
cgit v1.2.3


From 1c1fbb865d713d667d62c9c676b79cf9c14ba39e Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:23 +0200
Subject: ata: libata: Assign print_id at port allocation time

While the assignment of ap->print_id could have been moved to
ata_host_alloc(), let's simply move it to ata_port_alloc().

If you allocate a port, you want to give it a unique name that can be used
for printing.

By moving the ap->print_id assignment to ata_port_alloc(), means that we
can also remove the ap->print_id assignment from ata_sas_port_alloc().

This will allow a LLD to use the ata_port_*() print functions before
ata_host_register() has been called.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-17-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-core.c | 6 +-----
 drivers/ata/libata-sata.c | 1 -
 drivers/ata/libata.h      | 1 -
 3 files changed, 1 insertion(+), 7 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 68a75483822e..da7c141b1f2e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5470,7 +5470,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
 	ap->lock = &host->lock;
-	ap->print_id = -1;
+	ap->print_id = atomic_inc_return(&ata_print_id);
 	ap->host = host;
 	ap->dev = host->dev;
 
@@ -5907,10 +5907,6 @@ int ata_host_register(struct ata_host *host, const struct scsi_host_template *sh
 		return -EINVAL;
 	}
 
-	/* give ports names and add SCSI hosts */
-	for (i = 0; i < host->n_ports; i++)
-		host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
-
 	/* Create associated sysfs transport objects  */
 	for (i = 0; i < host->n_ports; i++) {
 		rc = ata_tport_add(host->dev,host->ports[i]);
diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index 1a36a5d1d7bc..b602247604dc 100644
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -1234,7 +1234,6 @@ struct ata_port *ata_sas_port_alloc(struct ata_host *host,
 	ap->flags |= port_info->flags;
 	ap->ops = port_info->port_ops;
 	ap->cbl = ATA_CBL_SATA;
-	ap->print_id = atomic_inc_return(&ata_print_id);
 
 	return ap;
 }
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 38ce13b55474..5ea194ae8a8b 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -32,7 +32,6 @@ enum {
 
 #define ATA_PORT_TYPE_NAME	"ata_port"
 
-extern atomic_t ata_print_id;
 extern int atapi_passthru16;
 extern int libata_fua;
 extern int libata_noacpi;
-- 
cgit v1.2.3


From 1228713c75b891291e86c4b1ff0228862fad096a Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:24 +0200
Subject: ata: libata-core: Reuse available ata_port print_ids

Currently, the ata_port print_ids are increased indefinitely, even when
there are lower ids available.

E.g. on first boot you will have ata1-ata6 assigned.
After a rmmod + modprobe, you will instead have ata7-ata12 assigned.

Move to use the ida_alloc() API, such that print_ids will get reused.
This means that even after a rmmod + modprobe, the ports will be assigned
print_ids ata1-ata6.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-18-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-core.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index da7c141b1f2e..02c3b8a22417 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -86,7 +86,7 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
 static void ata_dev_xfermask(struct ata_device *dev);
 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
 
-atomic_t ata_print_id = ATOMIC_INIT(0);
+static DEFINE_IDA(ata_ida);
 
 #ifdef CONFIG_ATA_FORCE
 struct ata_force_param {
@@ -5463,6 +5463,7 @@ int sata_link_init_spd(struct ata_link *link)
 struct ata_port *ata_port_alloc(struct ata_host *host)
 {
 	struct ata_port *ap;
+	int id;
 
 	ap = kzalloc(sizeof(*ap), GFP_KERNEL);
 	if (!ap)
@@ -5470,7 +5471,12 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
 	ap->lock = &host->lock;
-	ap->print_id = atomic_inc_return(&ata_print_id);
+	id = ida_alloc_min(&ata_ida, 1, GFP_KERNEL);
+	if (id < 0) {
+		kfree(ap);
+		return NULL;
+	}
+	ap->print_id = id;
 	ap->host = host;
 	ap->dev = host->dev;
 
@@ -5504,6 +5510,7 @@ void ata_port_free(struct ata_port *ap)
 	kfree(ap->pmp_link);
 	kfree(ap->slave_link);
 	kfree(ap->ncq_sense_buf);
+	ida_free(&ata_ida, ap->print_id);
 	kfree(ap);
 }
 EXPORT_SYMBOL_GPL(ata_port_free);
-- 
cgit v1.2.3


From 0d3603acffe294ffacaf75b18b46f182b68a50df Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:25 +0200
Subject: ata,scsi: Remove wrapper ata_sas_port_alloc()

The ata_sas_port_alloc() wrapper mainly exists in order to export the
internal libata function which it wraps. The secondary reason is that
it initializes some ata_port struct members.

However, ata_sas_port_alloc() is only used in a single location,
sas_ata_init(), which already performs some ata_port struct member
initialization, so it does not make sense to spread this initialization
out over two separate locations.

Thus, remove the wrapper and instead export the libata function directly,
and move the libsas specific ata_port initialization to sas_ata_init(),
which already does some ata_port initialization.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-19-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/libata-core.c |  1 +
 drivers/ata/libata-sata.c | 35 -----------------------------------
 drivers/ata/libata.h      |  1 -
 3 files changed, 1 insertion(+), 36 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 02c3b8a22417..c7752dc80028 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5501,6 +5501,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	return ap;
 }
+EXPORT_SYMBOL_GPL(ata_port_alloc);
 
 void ata_port_free(struct ata_port *ap)
 {
diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index b602247604dc..48660d445602 100644
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -1204,41 +1204,6 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
 }
 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
 
-/**
- *	ata_sas_port_alloc - Allocate port for a SAS attached SATA device
- *	@host: ATA host container for all SAS ports
- *	@port_info: Information from low-level host driver
- *	@shost: SCSI host that the scsi device is attached to
- *
- *	LOCKING:
- *	PCI/etc. bus probe sem.
- *
- *	RETURNS:
- *	ata_port pointer on success / NULL on failure.
- */
-
-struct ata_port *ata_sas_port_alloc(struct ata_host *host,
-				    struct ata_port_info *port_info,
-				    struct Scsi_Host *shost)
-{
-	struct ata_port *ap;
-
-	ap = ata_port_alloc(host);
-	if (!ap)
-		return NULL;
-
-	ap->port_no = 0;
-	ap->pio_mask = port_info->pio_mask;
-	ap->mwdma_mask = port_info->mwdma_mask;
-	ap->udma_mask = port_info->udma_mask;
-	ap->flags |= port_info->flags;
-	ap->ops = port_info->port_ops;
-	ap->cbl = ATA_CBL_SATA;
-
-	return ap;
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
-
 /**
  *	ata_sas_device_configure - Default device_configure routine for libata
  *				   devices
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 5ea194ae8a8b..6abf265f626e 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -81,7 +81,6 @@ 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);
 extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
 				      u8 page, void *buf, unsigned int sectors);
-- 
cgit v1.2.3


From f97106b10d9ac0b5472be45cbc2d3de7d654648a Mon Sep 17 00:00:00 2001
From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 3 Jul 2024 20:44:26 +0200
Subject: ata: ahci: Add debug print for external port

Add a debug print that tells us if LPM is not getting enabled because the
port is external.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-20-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
 drivers/ata/ahci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index fc6fd583faf8..a05c17249448 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1732,8 +1732,10 @@ static void ahci_update_initial_lpm_policy(struct ata_port *ap)
 	 * Management Interaction in AHCI 1.3.1. Therefore, do not enable
 	 * LPM if the port advertises itself as an external port.
 	 */
-	if (ap->pflags & ATA_PFLAG_EXTERNAL)
+	if (ap->pflags & ATA_PFLAG_EXTERNAL) {
+		ata_port_dbg(ap, "external port, not enabling LPM\n");
 		return;
+	}
 
 	/* If no LPM states are supported by the HBA, do not bother with LPM */
 	if ((ap->host->flags & ATA_HOST_NO_PART) &&
-- 
cgit v1.2.3