iommu/amd: Add PCI segment support for ivrs_[ioapic/hpet/acpihid] commands

By default, PCI segment is zero and can be omitted. To support system
with non-zero PCI segment ID, modify the parsing functions to allow
PCI segment ID.

Co-developed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20220706113825.25582-33-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 27 insertions, 17 deletions

diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 0336740b41b0..19da19eaba99 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -84,6 +84,10 @@
 #define ACPI_DEVFLAG_ATSDIS             0x10000000
 
 #define LOOP_TIMEOUT	2000000
+
+#define IVRS_GET_SBDF_ID(seg, bus, dev, fd)	(((seg & 0xffff) << 16) | ((bus & 0xff) << 8) \
+						 | ((dev & 0x1f) << 3) | (fn & 0x7))
+
 /*
  * ACPI table definitions
  *
@@ -3291,15 +3295,17 @@ static int __init parse_amd_iommu_options(char *str)
 
 static int __init parse_ivrs_ioapic(char *str)
 {
-	unsigned int bus, dev, fn;
+	u32 seg = 0, bus, dev, fn;
 	int ret, id, i;
-	u16 devid;
+	u32 devid;
 
 	ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
-
 	if (ret != 4) {
-		pr_err("Invalid command line: ivrs_ioapic%s\n", str);
-		return 1;
+		ret = sscanf(str, "[%d]=%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn);
+		if (ret != 5) {
+			pr_err("Invalid command line: ivrs_ioapic%s\n", str);
+			return 1;
+		}
 	}
 
 	if (early_ioapic_map_size == EARLY_MAP_SIZE) {
@@ -3308,7 +3314,7 @@ static int __init parse_ivrs_ioapic(char *str)
 		return 1;
 	}
 
-	devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
+	devid = IVRS_GET_SBDF_ID(seg, bus, dev, fn);
 
 	cmdline_maps			= true;
 	i				= early_ioapic_map_size++;
@@ -3321,15 +3327,17 @@ static int __init parse_ivrs_ioapic(char *str)
 
 static int __init parse_ivrs_hpet(char *str)
 {
-	unsigned int bus, dev, fn;
+	u32 seg = 0, bus, dev, fn;
 	int ret, id, i;
-	u16 devid;
+	u32 devid;
 
 	ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
-
 	if (ret != 4) {
-		pr_err("Invalid command line: ivrs_hpet%s\n", str);
-		return 1;
+		ret = sscanf(str, "[%d]=%x:%x:%x.%x", &id, &seg, &bus, &dev, &fn);
+		if (ret != 5) {
+			pr_err("Invalid command line: ivrs_hpet%s\n", str);
+			return 1;
+		}
 	}
 
 	if (early_hpet_map_size == EARLY_MAP_SIZE) {
@@ -3338,7 +3346,7 @@ static int __init parse_ivrs_hpet(char *str)
 		return 1;
 	}
 
-	devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
+	devid = IVRS_GET_SBDF_ID(seg, bus, dev, fn);
 
 	cmdline_maps			= true;
 	i				= early_hpet_map_size++;
@@ -3351,15 +3359,18 @@ static int __init parse_ivrs_hpet(char *str)
 
 static int __init parse_ivrs_acpihid(char *str)
 {
-	u32 bus, dev, fn;
+	u32 seg = 0, bus, dev, fn;
 	char *hid, *uid, *p;
 	char acpiid[ACPIHID_UID_LEN + ACPIHID_HID_LEN] = {0};
 	int ret, i;
 
 	ret = sscanf(str, "[%x:%x.%x]=%s", &bus, &dev, &fn, acpiid);
 	if (ret != 4) {
-		pr_err("Invalid command line: ivrs_acpihid(%s)\n", str);
-		return 1;
+		ret = sscanf(str, "[%x:%x:%x.%x]=%s", &seg, &bus, &dev, &fn, acpiid);
+		if (ret != 5) {
+			pr_err("Invalid command line: ivrs_acpihid(%s)\n", str);
+			return 1;
+		}
 	}
 
 	p = acpiid;
@@ -3374,8 +3385,7 @@ static int __init parse_ivrs_acpihid(char *str)
 	i = early_acpihid_map_size++;
 	memcpy(early_acpihid_map[i].hid, hid, strlen(hid));
 	memcpy(early_acpihid_map[i].uid, uid, strlen(uid));
-	early_acpihid_map[i].devid =
-		((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
+	early_acpihid_map[i].devid = IVRS_GET_SBDF_ID(seg, bus, dev, fn);
 	early_acpihid_map[i].cmd_line	= true;
 
 	return 1;