[PATCH] enable RAID for SATA under VMD

[Kevin Friedberg <kev.friedberg@gmail.com>]

Detect when a SATA controller has been mapped under Intel Alderlake RST
VMD, so that it can use the VMD controller's RAID capabilities. Create
new device type SYS_DEV_SATA_VMD and list separate controller to prevent
mixing with the NVMe SYS_DEV_VMD devices on the same VMD domain.

Signed-off-by: Kevin Friedberg <kev.friedberg@gmail.com>
---
 platform-intel.c | 21 ++++++++++++++++++---
 platform-intel.h |  1 +
 super-intel.c    | 28 ++++++++++++++++++----------
 3 files changed, 37 insertions(+), 13 deletions(-)

diff --git a/platform-intel.c b/platform-intel.c
index 757f0b1b..914164c0 100644
--- a/platform-intel.c
+++ b/platform-intel.c
@@ -64,9 +64,10 @@ struct sys_dev *find_driver_devices(const char *bus, const char *driver)
 
 	if (strcmp(driver, "isci") == 0)
 		type = SYS_DEV_SAS;
-	else if (strcmp(driver, "ahci") == 0)
+	else if (strcmp(driver, "ahci") == 0) {
+		vmd = find_driver_devices("pci", "vmd");
 		type = SYS_DEV_SATA;
-	else if (strcmp(driver, "nvme") == 0) {
+	} else if (strcmp(driver, "nvme") == 0) {
 		/* if looking for nvme devs, first look for vmd */
 		vmd = find_driver_devices("pci", "vmd");
 		type = SYS_DEV_NVME;
@@ -115,6 +116,17 @@ struct sys_dev *find_driver_devices(const char *bus, const char *driver)
 			free(rp);
 		}
 
+		/* change sata type if under a vmd controller */
+		if (type == SYS_DEV_SATA) {
+			struct sys_dev *dev;
+			char *rp = realpath(path, NULL);
+			for (dev = vmd; dev; dev = dev->next) {
+				if ((strncmp(dev->path, rp, strlen(dev->path)) == 0))
+					type = SYS_DEV_SATA_VMD;
+			}
+			free(rp);
+		}
+
 		/* if it's not Intel device or mark as VMD connected - skip it. */
 		if (devpath_to_vendor(path) != 0x8086 || skip == 1)
 			continue;
@@ -166,7 +178,8 @@ struct sys_dev *find_driver_devices(const char *bus, const char *driver)
 	}
 	closedir(driver_dir);
 
-	if (vmd) {
+	/* nvme vmd needs a list separate from sata vmd */
+	if (vmd && type == SYS_DEV_NVME) {
 		if (list)
 			list->next = vmd;
 		else
@@ -273,6 +286,7 @@ struct sys_dev *find_intel_devices(void)
 		free_sys_dev(&intel_devices);
 
 	isci = find_driver_devices("pci", "isci");
+	/* Searching for AHCI will return list of SATA and SATA VMD controllers */
 	ahci = find_driver_devices("pci", "ahci");
 	/* Searching for NVMe will return list of NVMe and VMD controllers */
 	nvme = find_driver_devices("pci", "nvme");
@@ -638,6 +652,7 @@ const struct imsm_orom *find_imsm_efi(struct sys_dev *hba)
 
 		break;
 	case SYS_DEV_VMD:
+	case SYS_DEV_SATA_VMD:
 		for (i = 0; i < ARRAY_SIZE(vmd_efivars); i++) {
 			if (!read_efi_variable(&orom, sizeof(orom),
 						vmd_efivars[i], VENDOR_GUID))
diff --git a/platform-intel.h b/platform-intel.h
index 6238d23f..2c0f4e39 100644
--- a/platform-intel.h
+++ b/platform-intel.h
@@ -196,6 +196,7 @@ enum sys_dev_type {
 	SYS_DEV_SATA,
 	SYS_DEV_NVME,
 	SYS_DEV_VMD,
+	SYS_DEV_SATA_VMD,
 	SYS_DEV_MAX
 };
 
diff --git a/super-intel.c b/super-intel.c
index 89fac626..13671be1 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -626,7 +626,8 @@ static const char *_sys_dev_type[] = {
 	[SYS_DEV_SAS] = "SAS",
 	[SYS_DEV_SATA] = "SATA",
 	[SYS_DEV_NVME] = "NVMe",
-	[SYS_DEV_VMD] = "VMD"
+	[SYS_DEV_VMD] = "VMD",
+	[SYS_DEV_SATA_VMD] = "SATA VMD"
 };
 
 const char *get_sys_dev_type(enum sys_dev_type type)
@@ -2559,6 +2560,8 @@ static void print_found_intel_controllers(struct sys_dev *elem)
 
 		if (elem->type == SYS_DEV_VMD)
 			fprintf(stderr, "VMD domain");
+		else if (elem->type == SYS_DEV_SATA_VMD)
+			fprintf(stderr, "SATA VMD domain");
 		else
 			fprintf(stderr, "RAID controller");
 
@@ -2729,8 +2732,9 @@ static int detail_platform_imsm(int verbose, int enumerate_only, char *controlle
 		if (!find_imsm_capability(hba)) {
 			char buf[PATH_MAX];
 			pr_err("imsm capabilities not found for controller: %s (type %s)\n",
-				  hba->type == SYS_DEV_VMD ? vmd_domain_to_controller(hba, buf) : hba->path,
-				  get_sys_dev_type(hba->type));
+				  hba->type == SYS_DEV_VMD || hba->type == SYS_DEV_SATA_VMD ?
+				  vmd_domain_to_controller(hba, buf) :
+				  hba->path, get_sys_dev_type(hba->type));
 			continue;
 		}
 		result = 0;
@@ -2783,11 +2787,12 @@ static int detail_platform_imsm(int verbose, int enumerate_only, char *controlle
 
 			printf(" I/O Controller : %s (%s)\n",
 				hba->path, get_sys_dev_type(hba->type));
-			if (hba->type == SYS_DEV_SATA) {
+			if (hba->type == SYS_DEV_SATA || hba->type == SYS_DEV_SATA_VMD) {
 				host_base = ahci_get_port_count(hba->path, &port_count);
 				if (ahci_enumerate_ports(hba->path, port_count, host_base, verbose)) {
 					if (verbose > 0)
-						pr_err("failed to enumerate ports on SATA controller at %s.\n", hba->pci_id);
+						pr_err("failed to enumerate ports on %s controller at %s.\n",
+							get_sys_dev_type(hba->type), hba->pci_id);
 					result |= 2;
 				}
 			}
@@ -2817,7 +2822,8 @@ static int export_detail_platform_imsm(int verbose, char *controller_path)
 		if (!find_imsm_capability(hba) && verbose > 0) {
 			char buf[PATH_MAX];
 			pr_err("IMSM_DETAIL_PLATFORM_ERROR=NO_IMSM_CAPABLE_DEVICE_UNDER_%s\n",
-			hba->type == SYS_DEV_VMD ? vmd_domain_to_controller(hba, buf) : hba->path);
+				hba->type == SYS_DEV_VMD || hba->type == SYS_DEV_SATA_VMD ?
+				vmd_domain_to_controller(hba, buf) : hba->path);
 		}
 		else
 			result = 0;
@@ -2826,7 +2832,7 @@ static int export_detail_platform_imsm(int verbose, char *controller_path)
 	const struct orom_entry *entry;
 
 	for (entry = orom_entries; entry; entry = entry->next) {
-		if (entry->type == SYS_DEV_VMD) {
+		if (entry->type == SYS_DEV_VMD || entry->type == SYS_DEV_SATA_VMD) {
 			for (hba = list; hba; hba = hba->next)
 				print_imsm_capability_export(&entry->orom);
 			continue;
@@ -4742,10 +4748,12 @@ static int find_intel_hba_capability(int fd, struct intel_super *super, char *de
 				"    but the container is assigned to Intel(R) %s %s (",
 				devname,
 				get_sys_dev_type(hba_name->type),
-				hba_name->type == SYS_DEV_VMD ? "domain" : "RAID controller",
+				hba_name->type == SYS_DEV_VMD || hba_name->type == SYS_DEV_SATA_VMD ?
+					"domain" : "RAID controller",
 				hba_name->pci_id ? : "Err!",
 				get_sys_dev_type(super->hba->type),
-				hba->type == SYS_DEV_VMD ? "domain" : "RAID controller");
+				hba->type == SYS_DEV_VMD || hba_name->type == SYS_DEV_SATA_VMD ?
+					"domain" : "RAID controller");
 
 			while (hba) {
 				fprintf(stderr, "%s", hba->pci_id ? : "Err!");
@@ -11234,7 +11242,7 @@ static const char *imsm_get_disk_controller_domain(const char *path)
 		hba = find_disk_attached_hba(-1, path);
 		if (hba && hba->type == SYS_DEV_SAS)
 			drv = "isci";
-		else if (hba && hba->type == SYS_DEV_SATA)
+		else if (hba && (hba->type == SYS_DEV_SATA || hba->type == SYS_DEV_SATA_VMD))
 			drv = "ahci";
 		else if (hba && hba->type == SYS_DEV_VMD)
 			drv = "vmd";
-- 
2.39.1