Merge tag 'ata-6.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux

2bd37315 · Linus Torvalds <[email protected]> · 2025-08-29 07:29:17 -07:00

Pull ata fixes from Damien Le Moal:

 - Fix the type of return values to be signed in the ahci_xgen driver
   (Qianfeng)

 - Add the mask_port_ext module parameter to the ahci driver.

   This is to allow a user to ignore ports that are advertized as
   external (hotplug capable) in favor of lower link power management
   policies instead of the default max_performance for these ports.

   This is useful to allow e.g. laptops to go into low power states when
   hooked up to docking station with sata slots, connected with an
   external port for hotplug (me)

* tag 'ata-6.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
  ata: ahci_xgene: Use int type for 'rc' to store error codes
  ata: ahci: Allow ignoring the external/hotplug capability of ports

Commit: 2bd3731542af4d32402fdc0e247153a94efeb682
Parents: 18ee2b9b · 82b81661

Merge commit. Changes below are compared with the first parent: 18ee2b9b.

Changes

3 files changed · +43 −22

File	Status	Add	Del	Content
drivers/ata/ahci.c	modified	+40	−17	View file
drivers/ata/ahci.h	modified	+1	−0	View file
drivers/ata/ahci_xgene.c	modified	+2	−5	View file

drivers/ata/ahci.c

View file

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index e1c24bb..7a7f88b 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -689,40 +689,50 @@ MODULE_PARM_DESC(mask_port_map,
 		 "where <pci_dev> is the PCI ID of an AHCI controller in the "
 		 "form \"domain:bus:dev.func\"");
 
-static void ahci_apply_port_map_mask(struct device *dev,
-				     struct ahci_host_priv *hpriv, char *mask_s)
+static char *ahci_mask_port_ext;
+module_param_named(mask_port_ext, ahci_mask_port_ext, charp, 0444);
+MODULE_PARM_DESC(mask_port_ext,
+		 "32-bits mask to ignore the external/hotplug capability of ports. "
+		 "Valid values are: "
+		 "\"<mask>\" to apply the same mask to all AHCI controller "
+		 "devices, and \"<pci_dev>=<mask>,<pci_dev>=<mask>,...\" to "
+		 "specify different masks for the controllers specified, "
+		 "where <pci_dev> is the PCI ID of an AHCI controller in the "
+		 "form \"domain:bus:dev.func\"");
+
+static u32 ahci_port_mask(struct device *dev, char *mask_s)
 {
 	unsigned int mask;
 
 	if (kstrtouint(mask_s, 0, &mask)) {
 		dev_err(dev, "Invalid port map mask\n");
-		return;
+		return 0;
 	}
 
-	hpriv->mask_port_map = mask;
+	return mask;
 }
 
-static void ahci_get_port_map_mask(struct device *dev,
-				   struct ahci_host_priv *hpriv)
+static u32 ahci_get_port_mask(struct device *dev, char *mask_p)
 {
 	char *param, *end, *str, *mask_s;
 	char *name;
+	u32 mask = 0;
 
-	if (!strlen(ahci_mask_port_map))
-		return;
+	if (!mask_p || !strlen(mask_p))
+		return 0;
 
-	str = kstrdup(ahci_mask_port_map, GFP_KERNEL);
+	str = kstrdup(mask_p, GFP_KERNEL);
 	if (!str)
-		return;
+		return 0;
 
 	/* Handle single mask case */
 	if (!strchr(str, '=')) {
-		ahci_apply_port_map_mask(dev, hpriv, str);
+		mask = ahci_port_mask(dev, str);
 		goto free;
 	}
 
 	/*
-	 * Mask list case: parse the parameter to apply the mask only if
+	 * Mask list case: parse the parameter to get the mask only if
 	 * the device name matches.
 	 */
 	param = str;
@@ -752,11 +762,13 @@ static void ahci_get_port_map_mask(struct device *dev,
 			param++;
 		}
 
-		ahci_apply_port_map_mask(dev, hpriv, mask_s);
+		mask = ahci_port_mask(dev, mask_s);
 	}
 
 free:
 	kfree(str);
+
+	return mask;
 }
 
 static void ahci_pci_save_initial_config(struct pci_dev *pdev,
@@ -782,8 +794,10 @@ static void ahci_pci_save_initial_config(struct pci_dev *pdev,
 	}
 
 	/* Handle port map masks passed as module parameter. */
-	if (ahci_mask_port_map)
-		ahci_get_port_map_mask(&pdev->dev, hpriv);
+	hpriv->mask_port_map =
+		ahci_get_port_mask(&pdev->dev, ahci_mask_port_map);
+	hpriv->mask_port_ext =
+		ahci_get_port_mask(&pdev->dev, ahci_mask_port_ext);
 
 	ahci_save_initial_config(&pdev->dev, hpriv);
 }
@@ -1757,11 +1771,20 @@ static void ahci_mark_external_port(struct ata_port *ap)
 	void __iomem *port_mmio = ahci_port_base(ap);
 	u32 tmp;
 
-	/* mark external ports (hotplug-capable, eSATA) */
+	/*
+	 * Mark external ports (hotplug-capable, eSATA), unless we were asked to
+	 * ignore this feature.
+	 */
 	tmp = readl(port_mmio + PORT_CMD);
 	if (((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS)) ||
-	    (tmp & PORT_CMD_HPCP))
+	    (tmp & PORT_CMD_HPCP)) {
+		if (hpriv->mask_port_ext & (1U << ap->port_no)) {
+			ata_port_info(ap,
+				"Ignoring external/hotplug capability\n");
+			return;
+		}
 		ap->pflags |= ATA_PFLAG_EXTERNAL;
+	}
 }
 
 static void ahci_update_initial_lpm_policy(struct ata_port *ap)

drivers/ata/ahci.h

View file

diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 2c10c8f..293b7fb 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -330,6 +330,7 @@ struct ahci_host_priv {
 	/* Input fields */
 	unsigned int		flags;		/* AHCI_HFLAG_* */
 	u32			mask_port_map;	/* Mask of valid ports */
+	u32			mask_port_ext;	/* Mask of ports ext capability */
 
 	void __iomem *		mmio;		/* bus-independent mem map */
 	u32			cap;		/* cap to use */

drivers/ata/ahci_xgene.c

View file

diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index 5d5a51a..6b88446 100644
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -450,7 +450,6 @@ static int xgene_ahci_pmp_softreset(struct ata_link *link, unsigned int *class,
 {
 	int pmp = sata_srst_pmp(link);
 	struct ata_port *ap = link->ap;
-	u32 rc;
 	void __iomem *port_mmio = ahci_port_base(ap);
 	u32 port_fbs;
 
@@ -463,9 +462,7 @@ static int xgene_ahci_pmp_softreset(struct ata_link *link, unsigned int *class,
 	port_fbs |= pmp << PORT_FBS_DEV_OFFSET;
 	writel(port_fbs, port_mmio + PORT_FBS);
 
-	rc = ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
-
-	return rc;
+	return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
 }
 
 /**
@@ -500,7 +497,7 @@ static int xgene_ahci_softreset(struct ata_link *link, unsigned int *class,
 	u32 port_fbs;
 	u32 port_fbs_save;
 	u32 retry = 1;
-	u32 rc;
+	int rc;
 
 	port_fbs_save = readl(port_mmio + PORT_FBS);
 