Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 413 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/sa.c b/drivers/scsi/aacraid/sa.c
new file mode 100644
index 000000000..c9a1dad2f
--- /dev/null
+++ b/drivers/scsi/aacraid/sa.c
@@ -0,0 +1,413 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *	Adaptec AAC series RAID controller driver
+ *	(c) Copyright 2001 Red Hat Inc.
+ *
+ * based on the old aacraid driver that is..
+ * Adaptec aacraid device driver for Linux.
+ *
+ * Copyright (c) 2000-2010 Adaptec, Inc.
+ *               2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
+ *		 2016-2017 Microsemi Corp. (aacraid@microsemi.com)
+ *
+ * Module Name:
+ *  sa.c
+ *
+ * Abstract: Drawbridge specific support functions
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/time.h>
+#include <linux/interrupt.h>
+
+#include <scsi/scsi_host.h>
+
+#include "aacraid.h"
+
+static irqreturn_t aac_sa_intr(int irq, void *dev_id)
+{
+	struct aac_dev *dev = dev_id;
+	unsigned short intstat, mask;
+
+	intstat = sa_readw(dev, DoorbellReg_p);
+	/*
+	 *	Read mask and invert because drawbridge is reversed.
+	 *	This allows us to only service interrupts that have been enabled.
+	 */
+	mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
+
+	/* Check to see if this is our interrupt.  If it isn't just return */
+
+	if (intstat & mask) {
+		if (intstat & PrintfReady) {
+			aac_printf(dev, sa_readl(dev, Mailbox5));
+			sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
+			sa_writew(dev, DoorbellReg_s, PrintfDone);
+		} else if (intstat & DOORBELL_1) {	// dev -> Host Normal Command Ready
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
+			aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
+		} else if (intstat & DOORBELL_2) {	// dev -> Host Normal Response Ready
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
+			aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
+		} else if (intstat & DOORBELL_3) {	// dev -> Host Normal Command Not Full
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
+		} else if (intstat & DOORBELL_4) {	// dev -> Host Normal Response Not Full
+			sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
+		}
+		return IRQ_HANDLED;
+	}
+	return IRQ_NONE;
+}
+
+/**
+ *	aac_sa_disable_interrupt	-	disable interrupt
+ *	@dev: Which adapter to enable.
+ */
+
+static void aac_sa_disable_interrupt (struct aac_dev *dev)
+{
+	sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
+}
+
+/**
+ *	aac_sa_enable_interrupt	-	enable interrupt
+ *	@dev: Which adapter to enable.
+ */
+
+static void aac_sa_enable_interrupt (struct aac_dev *dev)
+{
+	sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
+				DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
+}
+
+/**
+ *	aac_sa_notify_adapter		-	handle adapter notification
+ *	@dev:	Adapter that notification is for
+ *	@event:	Event to notidy
+ *
+ *	Notify the adapter of an event
+ */
+ 
+static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
+{
+	switch (event) {
+
+	case AdapNormCmdQue:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_1);
+		break;
+	case HostNormRespNotFull:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_4);
+		break;
+	case AdapNormRespQue:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_2);
+		break;
+	case HostNormCmdNotFull:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_3);
+		break;
+	case HostShutdown:
+		/*
+		sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
+		NULL, NULL, NULL, NULL, NULL);
+		*/
+		break;
+	case FastIo:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_6);
+		break;
+	case AdapPrintfDone:
+		sa_writew(dev, DoorbellReg_s,DOORBELL_5);
+		break;
+	default:
+		BUG();
+		break;
+	}
+}
+
+
+/**
+ *	sa_sync_cmd	-	send a command and wait
+ *	@dev: Adapter
+ *	@command: Command to execute
+ *	@p1: first parameter
+ *	@p2: second parameter
+ *	@p3: third parameter
+ *	@p4: forth parameter
+ *	@p5: fifth parameter
+ *	@p6: sixth parameter
+ *	@ret: adapter status
+ *	@r1: first return value
+ *	@r2: second return value
+ *	@r3: third return value
+ *	@r4: forth return value
+ *
+ *	This routine will send a synchronous command to the adapter and wait
+ *	for its	completion.
+ */
+static int sa_sync_cmd(struct aac_dev *dev, u32 command,
+		u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
+		u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
+{
+	unsigned long start;
+ 	int ok;
+	/*
+	 *	Write the Command into Mailbox 0
+	 */
+	sa_writel(dev, Mailbox0, command);
+	/*
+	 *	Write the parameters into Mailboxes 1 - 4
+	 */
+	sa_writel(dev, Mailbox1, p1);
+	sa_writel(dev, Mailbox2, p2);
+	sa_writel(dev, Mailbox3, p3);
+	sa_writel(dev, Mailbox4, p4);
+
+	/*
+	 *	Clear the synch command doorbell to start on a clean slate.
+	 */
+	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
+	/*
+	 *	Signal that there is a new synch command
+	 */
+	sa_writew(dev, DoorbellReg_s, DOORBELL_0);
+
+	ok = 0;
+	start = jiffies;
+
+	while(time_before(jiffies, start+30*HZ))
+	{
+		/*
+		 *	Delay 5uS so that the monitor gets access
+		 */
+		udelay(5);
+		/*
+		 *	Mon110 will set doorbell0 bit when it has 
+		 *	completed the command.
+		 */
+		if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
+			ok = 1;
+			break;
+		}
+		msleep(1);
+	}
+
+	if (ok != 1)
+		return -ETIMEDOUT;
+	/*
+	 *	Clear the synch command doorbell.
+	 */
+	sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
+	/*
+	 *	Pull the synch status from Mailbox 0.
+	 */
+	if (ret)
+		*ret = sa_readl(dev, Mailbox0);
+	if (r1)
+		*r1 = sa_readl(dev, Mailbox1);
+	if (r2)
+		*r2 = sa_readl(dev, Mailbox2);
+	if (r3)
+		*r3 = sa_readl(dev, Mailbox3);
+	if (r4)
+		*r4 = sa_readl(dev, Mailbox4);
+	return 0;
+}
+
+/**
+ *	aac_sa_interrupt_adapter	-	interrupt an adapter
+ *	@dev: Which adapter to enable.
+ *
+ *	Breakpoint an adapter.
+ */
+ 
+static void aac_sa_interrupt_adapter (struct aac_dev *dev)
+{
+	sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
+			NULL, NULL, NULL, NULL, NULL);
+}
+
+/**
+ *	aac_sa_start_adapter		-	activate adapter
+ *	@dev:	Adapter
+ *
+ *	Start up processing on an ARM based AAC adapter
+ */
+
+static void aac_sa_start_adapter(struct aac_dev *dev)
+{
+	union aac_init *init;
+	/*
+	 * Fill in the remaining pieces of the init.
+	 */
+	init = dev->init;
+	init->r7.host_elapsed_seconds = cpu_to_le32(ktime_get_real_seconds());
+	/* We can only use a 32 bit address here */
+	sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, 
+			(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
+			NULL, NULL, NULL, NULL, NULL);
+}
+
+static int aac_sa_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type)
+{
+	return -EINVAL;
+}
+
+/**
+ *	aac_sa_check_health
+ *	@dev: device to check if healthy
+ *
+ *	Will attempt to determine if the specified adapter is alive and
+ *	capable of handling requests, returning 0 if alive.
+ */
+static int aac_sa_check_health(struct aac_dev *dev)
+{
+	long status = sa_readl(dev, Mailbox7);
+
+	/*
+	 *	Check to see if the board failed any self tests.
+	 */
+	if (status & SELF_TEST_FAILED)
+		return -1;
+	/*
+	 *	Check to see if the board panic'd while booting.
+	 */
+	if (status & KERNEL_PANIC)
+		return -2;
+	/*
+	 *	Wait for the adapter to be up and running. Wait up to 3 minutes
+	 */
+	if (!(status & KERNEL_UP_AND_RUNNING))
+		return -3;
+	/*
+	 *	Everything is OK
+	 */
+	return 0;
+}
+
+/**
+ *	aac_sa_ioremap
+ *	@dev: device to ioremap
+ *	@size: mapping resize request
+ *
+ */
+static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
+{
+	if (!size) {
+		iounmap(dev->regs.sa);
+		return 0;
+	}
+	dev->base = dev->regs.sa = ioremap(dev->base_start, size);
+	return (dev->base == NULL) ? -1 : 0;
+}
+
+/**
+ *	aac_sa_init	-	initialize an ARM based AAC card
+ *	@dev: device to configure
+ *
+ *	Allocate and set up resources for the ARM based AAC variants. The
+ *	device_interface in the commregion will be allocated and linked
+ *	to the comm region.
+ */
+
+int aac_sa_init(struct aac_dev *dev)
+{
+	unsigned long start;
+	unsigned long status;
+	int instance;
+	const char *name;
+
+	instance = dev->id;
+	name     = dev->name;
+
+	/*
+	 *	Fill in the function dispatch table.
+	 */
+
+	dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
+	dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
+	dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
+	dev->a_ops.adapter_notify = aac_sa_notify_adapter;
+	dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
+	dev->a_ops.adapter_check_health = aac_sa_check_health;
+	dev->a_ops.adapter_restart = aac_sa_restart_adapter;
+	dev->a_ops.adapter_start = aac_sa_start_adapter;
+	dev->a_ops.adapter_intr = aac_sa_intr;
+	dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
+	dev->a_ops.adapter_ioremap = aac_sa_ioremap;
+
+	if (aac_sa_ioremap(dev, dev->base_size)) {
+		printk(KERN_WARNING "%s: unable to map adapter.\n", name);
+		goto error_iounmap;
+	}
+
+	/*
+	 *	Check to see if the board failed any self tests.
+	 */
+	if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
+		printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
+		goto error_iounmap;
+	}
+	/*
+	 *	Check to see if the board panic'd while booting.
+	 */
+	if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
+		printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
+		goto error_iounmap;
+	}
+	start = jiffies;
+	/*
+	 *	Wait for the adapter to be up and running. Wait up to 3 minutes.
+	 */
+	while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
+		if (time_after(jiffies, start+startup_timeout*HZ)) {
+			status = sa_readl(dev, Mailbox7);
+			printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n", 
+					name, instance, status);
+			goto error_iounmap;
+		}
+		msleep(1);
+	}
+
+	/*
+	 *	First clear out all interrupts.  Then enable the one's that 
+	 *	we can handle.
+	 */
+	aac_adapter_disable_int(dev);
+	aac_adapter_enable_int(dev);
+
+	if(aac_init_adapter(dev) == NULL)
+		goto error_irq;
+	dev->sync_mode = 0;	/* sync. mode not supported */
+	if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
+			IRQF_SHARED, "aacraid", (void *)dev) < 0) {
+		printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
+			name, instance);
+		goto error_iounmap;
+	}
+	dev->dbg_base = dev->base_start;
+	dev->dbg_base_mapped = dev->base;
+	dev->dbg_size = dev->base_size;
+
+	aac_adapter_enable_int(dev);
+
+	/*
+	 *	Tell the adapter that all is configure, and it can start 
+	 *	accepting requests
+	 */
+	aac_sa_start_adapter(dev);
+	return 0;
+
+error_irq:
+	aac_sa_disable_interrupt(dev);
+	free_irq(dev->pdev->irq, (void *)dev);
+
+error_iounmap:
+
+	return -1;
+}
+