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authorBjorn Helgaas <bhelgaas@google.com>2019-09-24 00:10:14 +0300
committerBjorn Helgaas <bhelgaas@google.com>2019-09-24 00:10:14 +0300
commit203104c8d5ece4e4c46096db40e04fe48b442cc6 (patch)
tree02445f61878e750b24f4bae00feada40a15b7c65 /drivers/pci/hotplug
parent63fa8437cbae701c163f692bce6ad6e847910e49 (diff)
parent4a06c2c38235d4a0bc436131591e2927288992fe (diff)
downloadlinux-203104c8d5ece4e4c46096db40e04fe48b442cc6.tar.xz
Merge branch 'pci/pciehp'
- Cleanup pciehp LED/indicator control with a new consolidated pciehp_set_indicators() interface that controls both Attention and Power Indicators (Denis Efremov) * pci/pciehp: PCI: pciehp: Refer to "Indicators" instead of "LEDs" in comments PCI: pciehp: Remove pciehp_green_led_{on,off,blink}() PCI: pciehp: Remove pciehp_set_attention_status() PCI: pciehp: Combine adjacent indicator updates PCI: pciehp: Add pciehp_set_indicators() to set both indicators
Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/pciehp.h11
-rw-r--r--drivers/pci/hotplug/pciehp_core.c9
-rw-r--r--drivers/pci/hotplug/pciehp_ctrl.c39
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c87
4 files changed, 66 insertions, 80 deletions
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 8c51a04b8083..654c972b8ea0 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -110,9 +110,9 @@ struct controller {
*
* @OFF_STATE: slot is powered off, no subordinate devices are enumerated
* @BLINKINGON_STATE: slot will be powered on after the 5 second delay,
- * green led is blinking
+ * Power Indicator is blinking
* @BLINKINGOFF_STATE: slot will be powered off after the 5 second delay,
- * green led is blinking
+ * Power Indicator is blinking
* @POWERON_STATE: slot is currently powering on
* @POWEROFF_STATE: slot is currently powering off
* @ON_STATE: slot is powered on, subordinate devices have been enumerated
@@ -167,12 +167,11 @@ int pciehp_power_on_slot(struct controller *ctrl);
void pciehp_power_off_slot(struct controller *ctrl);
void pciehp_get_power_status(struct controller *ctrl, u8 *status);
-void pciehp_set_attention_status(struct controller *ctrl, u8 status);
+#define INDICATOR_NOOP -1 /* Leave indicator unchanged */
+void pciehp_set_indicators(struct controller *ctrl, int pwr, int attn);
+
void pciehp_get_latch_status(struct controller *ctrl, u8 *status);
int pciehp_query_power_fault(struct controller *ctrl);
-void pciehp_green_led_on(struct controller *ctrl);
-void pciehp_green_led_off(struct controller *ctrl);
-void pciehp_green_led_blink(struct controller *ctrl);
bool pciehp_card_present(struct controller *ctrl);
bool pciehp_card_present_or_link_active(struct controller *ctrl);
int pciehp_check_link_status(struct controller *ctrl);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 6ad0d86762cb..b3122c151b80 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -95,15 +95,20 @@ static void cleanup_slot(struct controller *ctrl)
}
/*
- * set_attention_status - Turns the Amber LED for a slot on, off or blink
+ * set_attention_status - Turns the Attention Indicator on, off or blinking
*/
static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
{
struct controller *ctrl = to_ctrl(hotplug_slot);
struct pci_dev *pdev = ctrl->pcie->port;
+ if (status)
+ status <<= PCI_EXP_SLTCTL_ATTN_IND_SHIFT;
+ else
+ status = PCI_EXP_SLTCTL_ATTN_IND_OFF;
+
pci_config_pm_runtime_get(pdev);
- pciehp_set_attention_status(ctrl, status);
+ pciehp_set_indicators(ctrl, INDICATOR_NOOP, status);
pci_config_pm_runtime_put(pdev);
return 0;
}
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 631ced0ab28a..21af7b16d7a4 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -30,7 +30,10 @@
static void set_slot_off(struct controller *ctrl)
{
- /* turn off slot, turn on Amber LED, turn off Green LED if supported*/
+ /*
+ * Turn off slot, turn on attention indicator, turn off power
+ * indicator
+ */
if (POWER_CTRL(ctrl)) {
pciehp_power_off_slot(ctrl);
@@ -42,8 +45,8 @@ static void set_slot_off(struct controller *ctrl)
msleep(1000);
}
- pciehp_green_led_off(ctrl);
- pciehp_set_attention_status(ctrl, 1);
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
+ PCI_EXP_SLTCTL_ATTN_IND_ON);
}
/**
@@ -65,7 +68,8 @@ static int board_added(struct controller *ctrl)
return retval;
}
- pciehp_green_led_blink(ctrl);
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,
+ INDICATOR_NOOP);
/* Check link training status */
retval = pciehp_check_link_status(ctrl);
@@ -90,8 +94,8 @@ static int board_added(struct controller *ctrl)
}
}
- pciehp_green_led_on(ctrl);
- pciehp_set_attention_status(ctrl, 0);
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,
+ PCI_EXP_SLTCTL_ATTN_IND_OFF);
return 0;
err_exit:
@@ -100,7 +104,7 @@ err_exit:
}
/**
- * remove_board - Turns off slot and LEDs
+ * remove_board - Turn off slot and Power Indicator
* @ctrl: PCIe hotplug controller where board is being removed
* @safe_removal: whether the board is safely removed (versus surprise removed)
*/
@@ -123,8 +127,8 @@ static void remove_board(struct controller *ctrl, bool safe_removal)
&ctrl->pending_events);
}
- /* turn off Green LED */
- pciehp_green_led_off(ctrl);
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
+ INDICATOR_NOOP);
}
static int pciehp_enable_slot(struct controller *ctrl);
@@ -171,9 +175,9 @@ void pciehp_handle_button_press(struct controller *ctrl)
ctrl_info(ctrl, "Slot(%s) Powering on due to button press\n",
slot_name(ctrl));
}
- /* blink green LED and turn off amber */
- pciehp_green_led_blink(ctrl);
- pciehp_set_attention_status(ctrl, 0);
+ /* blink power indicator and turn off attention */
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,
+ PCI_EXP_SLTCTL_ATTN_IND_OFF);
schedule_delayed_work(&ctrl->button_work, 5 * HZ);
break;
case BLINKINGOFF_STATE:
@@ -187,12 +191,13 @@ void pciehp_handle_button_press(struct controller *ctrl)
cancel_delayed_work(&ctrl->button_work);
if (ctrl->state == BLINKINGOFF_STATE) {
ctrl->state = ON_STATE;
- pciehp_green_led_on(ctrl);
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,
+ PCI_EXP_SLTCTL_ATTN_IND_OFF);
} else {
ctrl->state = OFF_STATE;
- pciehp_green_led_off(ctrl);
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
+ PCI_EXP_SLTCTL_ATTN_IND_OFF);
}
- pciehp_set_attention_status(ctrl, 0);
ctrl_info(ctrl, "Slot(%s): Action canceled due to button press\n",
slot_name(ctrl));
break;
@@ -310,7 +315,9 @@ static int pciehp_enable_slot(struct controller *ctrl)
pm_runtime_get_sync(&ctrl->pcie->port->dev);
ret = __pciehp_enable_slot(ctrl);
if (ret && ATTN_BUTTN(ctrl))
- pciehp_green_led_off(ctrl); /* may be blinking */
+ /* may be blinking */
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
+ INDICATOR_NOOP);
pm_runtime_put(&ctrl->pcie->port->dev);
mutex_lock(&ctrl->state_lock);
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index bd990e3371e3..1a522c1c4177 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -418,65 +418,40 @@ int pciehp_set_raw_indicator_status(struct hotplug_slot *hotplug_slot,
return 0;
}
-void pciehp_set_attention_status(struct controller *ctrl, u8 value)
+/**
+ * pciehp_set_indicators() - set attention indicator, power indicator, or both
+ * @ctrl: PCIe hotplug controller
+ * @pwr: one of:
+ * PCI_EXP_SLTCTL_PWR_IND_ON
+ * PCI_EXP_SLTCTL_PWR_IND_BLINK
+ * PCI_EXP_SLTCTL_PWR_IND_OFF
+ * @attn: one of:
+ * PCI_EXP_SLTCTL_ATTN_IND_ON
+ * PCI_EXP_SLTCTL_ATTN_IND_BLINK
+ * PCI_EXP_SLTCTL_ATTN_IND_OFF
+ *
+ * Either @pwr or @attn can also be INDICATOR_NOOP to leave that indicator
+ * unchanged.
+ */
+void pciehp_set_indicators(struct controller *ctrl, int pwr, int attn)
{
- u16 slot_cmd;
+ u16 cmd = 0, mask = 0;
- if (!ATTN_LED(ctrl))
- return;
-
- switch (value) {
- case 0: /* turn off */
- slot_cmd = PCI_EXP_SLTCTL_ATTN_IND_OFF;
- break;
- case 1: /* turn on */
- slot_cmd = PCI_EXP_SLTCTL_ATTN_IND_ON;
- break;
- case 2: /* turn blink */
- slot_cmd = PCI_EXP_SLTCTL_ATTN_IND_BLINK;
- break;
- default:
- return;
+ if (PWR_LED(ctrl) && pwr != INDICATOR_NOOP) {
+ cmd |= (pwr & PCI_EXP_SLTCTL_PIC);
+ mask |= PCI_EXP_SLTCTL_PIC;
}
- pcie_write_cmd_nowait(ctrl, slot_cmd, PCI_EXP_SLTCTL_AIC);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
- pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
-}
-void pciehp_green_led_on(struct controller *ctrl)
-{
- if (!PWR_LED(ctrl))
- return;
-
- pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,
- PCI_EXP_SLTCTL_PIC);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
- pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
- PCI_EXP_SLTCTL_PWR_IND_ON);
-}
-
-void pciehp_green_led_off(struct controller *ctrl)
-{
- if (!PWR_LED(ctrl))
- return;
-
- pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
- PCI_EXP_SLTCTL_PIC);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
- pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
- PCI_EXP_SLTCTL_PWR_IND_OFF);
-}
-
-void pciehp_green_led_blink(struct controller *ctrl)
-{
- if (!PWR_LED(ctrl))
- return;
+ if (ATTN_LED(ctrl) && attn != INDICATOR_NOOP) {
+ cmd |= (attn & PCI_EXP_SLTCTL_AIC);
+ mask |= PCI_EXP_SLTCTL_AIC;
+ }
- pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,
- PCI_EXP_SLTCTL_PIC);
- ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
- pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
- PCI_EXP_SLTCTL_PWR_IND_BLINK);
+ if (cmd) {
+ pcie_write_cmd_nowait(ctrl, cmd, mask);
+ ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
+ pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, cmd);
+ }
}
int pciehp_power_on_slot(struct controller *ctrl)
@@ -638,8 +613,8 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id)
if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
ctrl->power_fault_detected = 1;
ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));
- pciehp_set_attention_status(ctrl, 1);
- pciehp_green_led_off(ctrl);
+ pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
+ PCI_EXP_SLTCTL_ATTN_IND_ON);
}
/*