Merge commit '49caedb668e476c100d727f2174724e0610a2b92' of https://github.com/openbmc/linux into openbmc/dev-5.15-intel-bump_v5.15.36

Signed-off-by: Sujoy Ray <sujoy.ray@intel.com>

4 files changed, 97 insertions, 2 deletions

diff --git a/drivers/soc/aspeed/Kconfig b/drivers/soc/aspeed/Kconfig
index 1914f33f0b3b..09bf81b295fd 100644
--- a/drivers/soc/aspeed/Kconfig
+++ b/drivers/soc/aspeed/Kconfig
@@ -108,6 +108,13 @@ config ASPEED_VGA_SHAREDMEM
 	  specification, BIOS will transfer whole SMBIOS table to VGA memory,
 	  and BMC can get the table from VGA memory through this driver.
 
+config ASPEED_SBC
+	bool "ASPEED Secure Boot Controller driver"
+	default MACH_ASPEED_G6
+	help
+	  Say yes to provide information about the secure boot controller in
+	  debugfs.
+
 endmenu
 
 endif
diff --git a/drivers/soc/aspeed/Makefile b/drivers/soc/aspeed/Makefile
index 0ff455f0d0d1..6b498ad1537a 100644
--- a/drivers/soc/aspeed/Makefile
+++ b/drivers/soc/aspeed/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_ASPEED_LPC_SNOOP)		+= aspeed-lpc-snoop.o
 obj-$(CONFIG_ASPEED_UART_ROUTING)	+= aspeed-uart-routing.o
 obj-$(CONFIG_ASPEED_P2A_CTRL)		+= aspeed-p2a-ctrl.o
 obj-$(CONFIG_ASPEED_SOCINFO)		+= aspeed-socinfo.o
+obj-$(CONFIG_ASPEED_SBC)		+= aspeed-sbc.o
 obj-$(CONFIG_ASPEED_XDMA)	+= aspeed-xdma.o
 obj-$(CONFIG_ASPEED_VGA_SHAREDMEM)	+= aspeed-vga-sharedmem.o
 obj-$(CONFIG_ASPEED_MCTP)		+= aspeed-mctp.o
diff --git a/drivers/soc/aspeed/aspeed-sbc.c b/drivers/soc/aspeed/aspeed-sbc.c
new file mode 100644
index 000000000000..be4497b418c4
--- /dev/null
+++ b/drivers/soc/aspeed/aspeed-sbc.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Copyright 2022 IBM Corp. */
+
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/debugfs.h>
+
+#define SEC_STATUS		0x14
+#define ABR_IMAGE_SOURCE	BIT(13)
+#define OTP_PROTECTED		BIT(8)
+#define LOW_SEC_KEY		BIT(7)
+#define SECURE_BOOT		BIT(6)
+#define UART_BOOT		BIT(5)
+
+struct sbe {
+	u8 abr_image;
+	u8 low_security_key;
+	u8 otp_protected;
+	u8 secure_boot;
+	u8 invert;
+	u8 uart_boot;
+};
+
+static struct sbe sbe;
+
+static int __init aspeed_sbc_init(void)
+{
+	struct device_node *np;
+	void __iomem *base;
+	struct dentry *sbc_dir;
+	u32 security_status;
+
+	/* AST2600 only */
+	np = of_find_compatible_node(NULL, NULL, "aspeed,ast2600-sbc");
+	if (!of_device_is_available(np))
+		return -ENODEV;
+
+	base = of_iomap(np, 0);
+	if (!base) {
+		of_node_put(np);
+		return -ENODEV;
+	}
+
+	security_status = readl(base + SEC_STATUS);
+
+	iounmap(base);
+	of_node_put(np);
+
+	sbe.abr_image = !!(security_status & ABR_IMAGE_SOURCE);
+	sbe.low_security_key = !!(security_status & LOW_SEC_KEY);
+	sbe.otp_protected = !!(security_status & OTP_PROTECTED);
+	sbe.secure_boot = !!(security_status & SECURE_BOOT);
+	/* Invert the bit, as 1 is boot from SPI/eMMC */
+	sbe.uart_boot =  !(security_status & UART_BOOT);
+
+	pr_info("AST2600 secure boot %s\n", sbe.secure_boot ? "enabled" : "disabled");
+
+	sbc_dir = debugfs_create_dir("sbc", arch_debugfs_dir);
+	if (IS_ERR(sbc_dir))
+		return PTR_ERR(sbc_dir);
+
+	debugfs_create_u8("abr_image", 0444, sbc_dir, &sbe.abr_image);
+	debugfs_create_u8("low_security_key", 0444, sbc_dir, &sbe.low_security_key);
+	debugfs_create_u8("otp_protected", 0444, sbc_dir, &sbe.otp_protected);
+	debugfs_create_u8("uart_boot", 0444, sbc_dir, &sbe.uart_boot);
+	debugfs_create_u8("secure_boot", 0444, sbc_dir, &sbe.secure_boot);
+
+	return 0;
+}
+
+subsys_initcall(aspeed_sbc_init);
diff --git a/drivers/soc/aspeed/aspeed-xdma.c b/drivers/soc/aspeed/aspeed-xdma.c
index 48cfe30c90ad..579937ee3745 100644
--- a/drivers/soc/aspeed/aspeed-xdma.c
+++ b/drivers/soc/aspeed/aspeed-xdma.c
@@ -253,6 +253,9 @@ struct aspeed_xdma_client {
 	u32 size;
 };
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/xdma.h>
+
 static u32 aspeed_xdma_readl(struct aspeed_xdma *ctx, u8 reg)
 {
 	u32 v = readl(ctx->base + reg);
@@ -448,6 +451,7 @@ static int aspeed_xdma_start(struct aspeed_xdma *ctx, unsigned int num_cmds,
 
 	ctx->upstream = upstream;
 	for (i = 0; i < num_cmds; ++i) {
+		trace_xdma_start(ctx, &cmds[i]);
 		/*
 		 * Use memcpy_toio here to get some barriers before starting
 		 * the operation. The command(s) need to be in physical memory
@@ -490,6 +494,8 @@ static irqreturn_t aspeed_xdma_irq(int irq, void *arg)
 	spin_lock(&ctx->engine_lock);
 	status = aspeed_xdma_readl(ctx, ctx->chip->regs.status);
 
+	trace_xdma_irq(status);
+
 	if (status & ctx->chip->status_bits.ds_dirty) {
 		aspeed_xdma_done(ctx, true);
 	} else {
@@ -514,6 +520,8 @@ static void aspeed_xdma_reset(struct aspeed_xdma *ctx)
 {
 	unsigned long flags;
 
+	trace_xdma_reset(ctx);
+
 	reset_control_assert(ctx->reset);
 	usleep_range(XDMA_ENGINE_SETUP_TIME_MIN_US,
 		     XDMA_ENGINE_SETUP_TIME_MAX_US);
@@ -544,7 +552,7 @@ static irqreturn_t aspeed_xdma_pcie_irq(int irq, void *arg)
 {
 	struct aspeed_xdma *ctx = arg;
 
-	dev_dbg(ctx->dev, "PCI-E reset requested.\n");
+	trace_xdma_perst(ctx);
 
 	spin_lock(&ctx->engine_lock);
 	if (ctx->in_reset) {
@@ -682,6 +690,7 @@ static void aspeed_xdma_vma_close(struct vm_area_struct *vma)
 
 	gen_pool_free(client->ctx->pool, (unsigned long)client->virt,
 		      client->size);
+	trace_xdma_unmap(client);
 
 	client->virt = NULL;
 	client->phys = 0;
@@ -706,6 +715,7 @@ static int aspeed_xdma_mmap(struct file *file, struct vm_area_struct *vma)
 	client->virt = gen_pool_dma_alloc(ctx->pool, client->size,
 					  &client->phys);
 	if (!client->virt) {
+		trace_xdma_mmap_error(client, 0UL);
 		client->phys = 0;
 		client->size = 0;
 		return -ENOMEM;
@@ -725,12 +735,14 @@ static int aspeed_xdma_mmap(struct file *file, struct vm_area_struct *vma)
 		gen_pool_free(ctx->pool, (unsigned long)client->virt,
 			      client->size);
 
+		trace_xdma_mmap_error(client, vma->vm_start);
 		client->virt = NULL;
 		client->phys = 0;
 		client->size = 0;
 		return rc;
 	}
 
+	trace_xdma_mmap(client);
 	dev_dbg(ctx->dev, "mmap: v[%08lx] to p[%08x], s[%08x]\n",
 		vma->vm_start, (u32)client->phys, client->size);
 
@@ -776,9 +788,11 @@ static int aspeed_xdma_release(struct inode *inode, struct file *file)
 	if (reset)
 		aspeed_xdma_reset(ctx);
 
-	if (client->virt)
+	if (client->virt) {
 		gen_pool_free(ctx->pool, (unsigned long)client->virt,
 			      client->size);
+		trace_xdma_unmap(client);
+	}
 
 	kfree(client);
 	kobject_put(&ctx->kobj);