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kernel: supports LED trigger by SATA Port Multiplier port

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This commit is contained in:
Liangbin Lian 2025-01-02 19:40:53 +08:00
parent a0f8ed1334
commit e3263dd951
2 changed files with 248 additions and 0 deletions
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1
target/linux/generic/config-6.6
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@ -5180,6 +5180,7 @@ CONFIG_SATA_MOBILE_LPM_POLICY=0
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PMP is not set
# CONFIG_SATA_PMP_LEDS is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_RCAR is not set

247
target/linux/generic/pending-6.6/835-ledtrig-sata-pmp.patch Normal file
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@ -0,0 +1,247 @@
From 86884eaf288a8ca29ef5ee049de8c5b9d854ca1f Mon Sep 17 00:00:00 2001
From: jjm2473 <1129525450@qq.com>
Date: Mon, 30 Oct 2023 13:53:40 +0800
Subject: [PATCH] drivers/ata: sata pmp supports led trigger
---
drivers/ata/Kconfig | 18 ++++++++++++++
drivers/ata/libata-core.c | 50 +++++++++++++++++++++++++++++++++++++++
drivers/ata/libata-pmp.c | 42 ++++++++++++++++++++++++++++++++
drivers/ata/libata.h | 8 +++++++
include/linux/libata.h | 7 +++++-
5 files changed, 124 insertions(+), 1 deletion(-)
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -83,6 +83,14 @@ config ATA_LEDS
If unsure, say N.
+config ATA_LINK_SUPPORTS_LEDS
+ bool
+ depends on LEDS_CLASS && LEDS_TRIGGERS
+ default y
+
+config ATA_LINK_LEDS
+ bool
+
config ATA_ACPI
bool "ATA ACPI Support"
depends on ACPI
@@ -118,6 +126,16 @@ config SATA_PMP
This option adds support for SATA Port Multipliers
(the SATA version of an ethernet hub, or SAS expander).
+config SATA_PMP_LEDS
+ bool "support SATA Port Multiplier port LED triggers"
+ depends on SATA_PMP && ATA_LINK_SUPPORTS_LEDS
+ select ATA_LINK_LEDS
+ help
+ This option adds a LED trigger for each registered SATA Port Multiplier port.
+ It is used to drive disk activity leds connected via GPIO.
+
+ If unsure, say N.
+
if HAS_DMA
comment "Controllers with non-SFF native interface"
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -696,6 +696,41 @@ static inline void ata_led_act(struct at
}
#endif
+#ifdef CONFIG_ATA_LINK_LEDS
+#define ATA_LINK_BLINK_DELAY 40 /* ms */
+static inline void ata_link_led_act(struct ata_link *link)
+{
+ unsigned long led_delay = ATA_LINK_BLINK_DELAY;
+
+ if (likely(!link->ledtrig || link->offline))
+ return;
+
+ led_trigger_blink_oneshot(link->ledtrig, &led_delay, &led_delay, !link->offline);
+}
+
+static inline void ata_link_led_link(struct ata_link *link, int offline)
+{
+ unsigned long led_delay = ATA_LINK_BLINK_DELAY << 1;
+ link->offline = offline;
+
+ if (likely(!link->ledtrig))
+ return;
+
+ led_trigger_blink_oneshot(link->ledtrig, &led_delay, &led_delay, !offline);
+}
+
+int ata_link_trig_activate(struct led_classdev *led_cdev)
+{
+ char (*ledtrig_name)[12] = (char (*)[12])led_cdev->trigger->name;
+ struct ata_link *link =
+ container_of(ledtrig_name, struct ata_link, ledtrig_name);
+
+ led_set_brightness(led_cdev, link->offline ? LED_OFF : LED_FULL);
+ return 0;
+}
+
+#endif
+
/**
* ata_build_rw_tf - Build ATA taskfile for given read/write request
* @qc: Metadata associated with the taskfile to build
@@ -3184,9 +3219,15 @@ static void sata_print_link_status(struc
tmp = (sstatus >> 4) & 0xf;
ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
sata_spd_string(tmp), sstatus, scontrol);
+#ifdef CONFIG_ATA_LINK_LEDS
+ ata_link_led_link(link, 0);
+#endif
} else {
ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
sstatus, scontrol);
+#ifdef CONFIG_ATA_LINK_LEDS
+ ata_link_led_link(link, 1);
+#endif
}
}
@@ -4786,6 +4827,10 @@ void __ata_qc_complete(struct ata_queued
ata_led_act(ap);
#endif
+#ifdef CONFIG_ATA_LINK_LEDS
+ ata_link_led_act(link);
+#endif
+
/* clear exclusive status */
if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
ap->excl_link == link))
@@ -5418,6 +5463,11 @@ void ata_link_init(struct ata_port *ap,
link->active_tag = ATA_TAG_POISON;
link->hw_sata_spd_limit = UINT_MAX;
+#ifdef CONFIG_ATA_LINK_LEDS
+ link->offline = 0;
+ link->ledtrig = NULL;
+#endif
+
/* can't use iterator, ap isn't initialized yet */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &link->device[i];
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -355,6 +355,16 @@ static int sata_pmp_init_links (struct a
goto err_tlink;
}
}
+#ifdef CONFIG_SATA_PMP_LEDS
+ for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
+ struct ata_link *link = &pmp_link[i];
+ link->ledtrig = NULL;
+ link->offline = 1;
+ snprintf(link->ledtrig_name,
+ sizeof(link->ledtrig_name), "ata%up%u",
+ ap->print_id, link->pmp);
+ }
+#endif
}
for (i = 0; i < nr_ports; i++) {
@@ -366,6 +376,23 @@ static int sata_pmp_init_links (struct a
ehc->i.action |= ATA_EH_RESET;
}
+#ifdef CONFIG_SATA_PMP_LEDS
+ for (i = 0; i < nr_ports; i++) {
+ struct ata_link *link = &pmp_link[i];
+ link->ledtrig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
+ if (unlikely(!link->ledtrig))
+ continue;
+
+ link->ledtrig->name = link->ledtrig_name;
+ link->ledtrig->activate = ata_link_trig_activate;
+
+ if (led_trigger_register(link->ledtrig)) {
+ kfree(link->ledtrig);
+ link->ledtrig = NULL;
+ }
+ }
+#endif
+
return 0;
err_tlink:
while (--i >= 0)
@@ -562,6 +589,10 @@ static void sata_pmp_detach(struct ata_d
struct ata_port *ap = link->ap;
struct ata_link *tlink;
unsigned long flags;
+#ifdef CONFIG_SATA_PMP_LEDS
+ int i;
+ struct ata_link *pmp_link = ap->pmp_link;
+#endif
ata_dev_info(dev, "Port Multiplier detaching\n");
@@ -578,6 +609,17 @@ static void sata_pmp_detach(struct ata_d
ap->nr_pmp_links = 0;
link->pmp = 0;
spin_unlock_irqrestore(ap->lock, flags);
+
+#ifdef CONFIG_SATA_PMP_LEDS
+ for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
+ struct ata_link *link = &pmp_link[i];
+ if (link->ledtrig) {
+ led_trigger_unregister(link->ledtrig);
+ kfree(link->ledtrig);
+ link->ledtrig = NULL;
+ }
+ }
+#endif
}
/**
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -12,6 +12,10 @@
#ifndef __LIBATA_H__
#define __LIBATA_H__
+#ifdef CONFIG_ATA_LINK_LEDS
+#include <linux/leds.h>
+#endif
+
#define DRV_NAME "libata"
#define DRV_VERSION "3.00" /* must be exactly four chars */
@@ -236,4 +240,8 @@ static inline void zpodd_disable_run_wak
static inline void zpodd_post_poweron(struct ata_device *dev) {}
#endif /* CONFIG_SATA_ZPODD */
+#ifdef CONFIG_ATA_LINK_LEDS
+int ata_link_trig_activate(struct led_classdev *led_cdev);
+#endif
+
#endif /* __LIBATA_H__ */
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -23,7 +23,7 @@
#include <linux/cdrom.h>
#include <linux/sched.h>
#include <linux/async.h>
-#ifdef CONFIG_ATA_LEDS
+#if defined(CONFIG_ATA_LEDS) || defined(CONFIG_ATA_LINK_LEDS)
#include <linux/leds.h>
#endif
@@ -803,6 +803,11 @@ struct ata_link {
struct ata_device device[ATA_MAX_DEVICES];
unsigned long last_lpm_change; /* when last LPM change happened */
+#ifdef CONFIG_ATA_LINK_LEDS
+ unsigned int offline;
+ struct led_trigger *ledtrig;
+ char ledtrig_name[12];
+#endif
};
#define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
#define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])