Merge tag 'pci-v5.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration:

   - Consolidate _HPP/_HPX stuff in pci-acpi.c and simplify it
     (Krzysztof Wilczynski)

   - Fix incorrect PCIe device types and remove dev->has_secondary_link
     to simplify code that deals with upstream/downstream ports (Mika
     Westerberg)

   - After suspend, restore Resizable BAR size bits correctly for 1MB
     BARs (Sumit Saxena)

   - Enable PCI_MSI_IRQ_DOMAIN support for RISC-V (Wesley Terpstra)

  Virtualization:

   - Add ACS quirks for iProc PAXB (Abhinav Ratna), Amazon Annapurna
     Labs (Ali Saidi)

   - Move sysfs SR-IOV functions to iov.c (Kelsey Skunberg)

   - Remove group write permissions from sysfs sriov_numvfs,
     sriov_drivers_autoprobe (Kelsey Skunberg)

  Hotplug:

   - Simplify pciehp indicator control (Denis Efremov)

  Peer-to-peer DMA:

   - Allow P2P DMA between root ports for whitelisted bridges (Logan
     Gunthorpe)

   - Whitelist some Intel host bridges for P2P DMA (Logan Gunthorpe)

   - DMA map P2P DMA requests that traverse host bridge (Logan
     Gunthorpe)

  Amazon Annapurna Labs host bridge driver:

   - Add DT binding and controller driver (Jonathan Chocron)

  Hyper-V host bridge driver:

   - Fix hv_pci_dev->pci_slot use-after-free (Dexuan Cui)

   - Fix PCI domain number collisions (Haiyang Zhang)

   - Use instance ID bytes 4 & 5 as PCI domain numbers (Haiyang Zhang)

   - Fix build errors on non-SYSFS config (Randy Dunlap)

  i.MX6 host bridge driver:

   - Limit DBI register length (Stefan Agner)

  Intel VMD host bridge driver:

   - Fix config addressing issues (Jon Derrick)

  Layerscape host bridge driver:

   - Add bar_fixed_64bit property to endpoint driver (Xiaowei Bao)

   - Add CONFIG_PCI_LAYERSCAPE_EP to build EP/RC drivers separately
     (Xiaowei Bao)

  Mediatek host bridge driver:

   - Add MT7629 controller support (Jianjun Wang)

  Mobiveil host bridge driver:

   - Fix CPU base address setup (Hou Zhiqiang)

   - Make "num-lanes" property optional (Hou Zhiqiang)

  Tegra host bridge driver:

   - Fix OF node reference leak (Nishka Dasgupta)

   - Disable MSI for root ports to work around design problem (Vidya
     Sagar)

   - Add Tegra194 DT binding and controller support (Vidya Sagar)

   - Add support for sideband pins and slot regulators (Vidya Sagar)

   - Add PIPE2UPHY support (Vidya Sagar)

  Misc:

   - Remove unused pci_block_cfg_access() et al (Kelsey Skunberg)

   - Unexport pci_bus_get(), etc (Kelsey Skunberg)

   - Hide PM, VC, link speed, ATS, ECRC, PTM constants and interfaces in
     the PCI core (Kelsey Skunberg)

   - Clean up sysfs DEVICE_ATTR() usage (Kelsey Skunberg)

   - Mark expected switch fall-through (Gustavo A. R. Silva)

   - Propagate errors for optional regulators and PHYs (Thierry Reding)

   - Fix kernel command line resource_alignment parameter issues (Logan
     Gunthorpe)"

* tag 'pci-v5.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (112 commits)
  PCI: Add pci_irq_vector() and other stubs when !CONFIG_PCI
  arm64: tegra: Add PCIe slot supply information in p2972-0000 platform
  arm64: tegra: Add configuration for PCIe C5 sideband signals
  PCI: tegra: Add support to enable slot regulators
  PCI: tegra: Add support to configure sideband pins
  PCI: vmd: Fix shadow offsets to reflect spec changes
  PCI: vmd: Fix config addressing when using bus offsets
  PCI: dwc: Add validation that PCIe core is set to correct mode
  PCI: dwc: al: Add Amazon Annapurna Labs PCIe controller driver
  dt-bindings: PCI: Add Amazon's Annapurna Labs PCIe host bridge binding
  PCI: Add quirk to disable MSI-X support for Amazon's Annapurna Labs Root Port
  PCI/VPD: Prevent VPD access for Amazon's Annapurna Labs Root Port
  PCI: Add ACS quirk for Amazon Annapurna Labs root ports
  PCI: Add Amazon's Annapurna Labs vendor ID
  MAINTAINERS: Add PCI native host/endpoint controllers designated reviewer
  PCI: hv: Use bytes 4 and 5 from instance ID as the PCI domain numbers
  dt-bindings: PCI: tegra: Add PCIe slot supplies regulator entries
  dt-bindings: PCI: tegra: Add sideband pins configuration entries
  PCI: tegra: Add Tegra194 PCIe support
  PCI: Get rid of dev->has_secondary_link flag
  ...

11 files changed, 68 insertions, 92 deletions

diff --git a/drivers/pci/hotplug/cpci_hotplug_core.c b/drivers/pci/hotplug/cpci_hotplug_core.c
index 603eadf3d965..d0559d2faf50 100644
--- a/drivers/pci/hotplug/cpci_hotplug_core.c
+++ b/drivers/pci/hotplug/cpci_hotplug_core.c
@@ -563,7 +563,6 @@ cleanup_slots(void)
 	}
 cleanup_null:
 	up_write(&list_rwsem);
-	return;
 }
 
 int
diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index 16bbb183695a..b8aacb41a83c 100644
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -173,7 +173,6 @@ static void pci_print_IRQ_route(void)
 		dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
 
 	}
-	return;
 }
 
 
diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c
index b7f4e1f099d9..68de958a9be8 100644
--- a/drivers/pci/hotplug/cpqphp_ctrl.c
+++ b/drivers/pci/hotplug/cpqphp_ctrl.c
@@ -1872,8 +1872,6 @@ static void interrupt_event_handler(struct controller *ctrl)
 			}
 		}		/* End of FOR loop */
 	}
-
-	return;
 }
 
 
@@ -1943,8 +1941,6 @@ void cpqhp_pushbutton_thread(struct timer_list *t)
 
 		p_slot->state = STATIC_STATE;
 	}
-
-	return;
 }
 
 
diff --git a/drivers/pci/hotplug/cpqphp_nvram.h b/drivers/pci/hotplug/cpqphp_nvram.h
index 918ff8dbfe62..70e879b6a23f 100644
--- a/drivers/pci/hotplug/cpqphp_nvram.h
+++ b/drivers/pci/hotplug/cpqphp_nvram.h
@@ -16,10 +16,7 @@
 
 #ifndef CONFIG_HOTPLUG_PCI_COMPAQ_NVRAM
 
-static inline void compaq_nvram_init(void __iomem *rom_start)
-{
-	return;
-}
+static inline void compaq_nvram_init(void __iomem *rom_start) { }
 
 static inline int compaq_nvram_load(void __iomem *rom_start, struct controller *ctrl)
 {
diff --git a/drivers/pci/hotplug/ibmphp_res.c b/drivers/pci/hotplug/ibmphp_res.c
index 5e8caf7a4452..5c93aa14f0de 100644
--- a/drivers/pci/hotplug/ibmphp_res.c
+++ b/drivers/pci/hotplug/ibmphp_res.c
@@ -1941,6 +1941,7 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 						break;
 					case PCI_HEADER_TYPE_BRIDGE:
 						function = 0x8;
+						/* fall through */
 					case PCI_HEADER_TYPE_MULTIBRIDGE:
 						/* We assume here that only 1 bus behind the bridge
 						   TO DO: add functionality for several:
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);
 	}
 
 	/*
diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index 182f9e3443ee..977946e4e613 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -473,7 +473,6 @@ int __init rpadlpar_io_init(void)
 void rpadlpar_io_exit(void)
 {
 	dlpar_sysfs_exit();
-	return;
 }
 
 module_init(rpadlpar_io_init);
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
index c3899ee1db99..18627bb21e9e 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -408,7 +408,6 @@ static void __exit cleanup_slots(void)
 		pci_hp_deregister(&slot->hotplug_slot);
 		dealloc_slot_struct(slot);
 	}
-	return;
 }
 
 static int __init rpaphp_init(void)