[efi] Add support for HII

Some EFI platforms expect us to provide an HII interface to display
information about the driver.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 374 insertions, 0 deletions

diff --git a/src/interface/efi/efi_snp.c b/src/interface/efi/efi_snp.c
index 608aaf50..f40bfff9 100644
--- a/src/interface/efi/efi_snp.c
+++ b/src/interface/efi/efi_snp.c
@@ -31,9 +31,13 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #include <ipxe/efi/efi_pci.h>
 #include <ipxe/efi/efi_driver.h>
 #include <ipxe/efi/efi_strings.h>
+#include <ipxe/efi/efi_hii.h>
 #include <ipxe/efi/Protocol/SimpleNetwork.h>
 #include <ipxe/efi/Protocol/NetworkInterfaceIdentifier.h>
 #include <ipxe/efi/Protocol/DevicePath.h>
+#include <ipxe/efi/Protocol/HiiConfigAccess.h>
+#include <ipxe/efi/Protocol/HiiDatabase.h>
+#include <config/general.h>
 
 /** @file
  *
@@ -71,6 +75,12 @@ struct efi_snp_device {
 	unsigned int rx_count_events;
 	/** The network interface identifier */
 	EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL nii;
+	/** HII configuration access protocol */
+	EFI_HII_CONFIG_ACCESS_PROTOCOL hii;
+	/** HII package list */
+	EFI_HII_PACKAGE_LIST_HEADER *package_list;
+	/** HII handle */
+	EFI_HII_HANDLE hii_handle;
 	/** Device name */
 	wchar_t name[ sizeof ( ( ( struct net_device * ) NULL )->name ) ];
 	/** The device path
@@ -744,6 +754,339 @@ static EFI_SIMPLE_NETWORK_PROTOCOL efi_snp_device_snp = {
 	.Receive	= efi_snp_receive,
 };
 
+/******************************************************************************
+ *
+ * Human Interface Infrastructure
+ *
+ ******************************************************************************
+ */
+
+/** EFI configuration access protocol GUID */
+static EFI_GUID efi_hii_config_access_protocol_guid
+	= EFI_HII_CONFIG_ACCESS_PROTOCOL_GUID;
+
+/** EFI HII database protocol */
+static EFI_HII_DATABASE_PROTOCOL *efihii;
+EFI_REQUIRE_PROTOCOL ( EFI_HII_DATABASE_PROTOCOL, &efihii );
+
+/** Local GUID used for our EFI SNP formset */
+#define EFI_SNP_FORMSET_GUID						\
+	{ 0xc4f84019, 0x6dfd, 0x4a27,					\
+	  { 0x9b, 0x94, 0xb7, 0x2e, 0x1f, 0xbc, 0xad, 0xca } }
+
+/** Form identifiers used for our EFI SNP HII */
+enum efi_snp_hii_form_id {
+	EFI_SNP_FORM = 0x0001,		/**< The only form */
+};
+
+/** String identifiers used for our EFI SNP HII */
+enum efi_snp_hii_string_id {
+	/* Language name */
+	EFI_SNP_LANGUAGE_NAME = 0x0001,
+	/* Formset */
+	EFI_SNP_FORMSET_TITLE, EFI_SNP_FORMSET_HELP,
+	/* Product name */
+	EFI_SNP_PRODUCT_PROMPT, EFI_SNP_PRODUCT_HELP, EFI_SNP_PRODUCT_TEXT,
+	/* Version */
+	EFI_SNP_VERSION_PROMPT, EFI_SNP_VERSION_HELP, EFI_SNP_VERSION_TEXT,
+	/* Driver */
+	EFI_SNP_DRIVER_PROMPT, EFI_SNP_DRIVER_HELP, EFI_SNP_DRIVER_TEXT,
+	/* Device */
+	EFI_SNP_DEVICE_PROMPT, EFI_SNP_DEVICE_HELP, EFI_SNP_DEVICE_TEXT,
+	/* End of list */
+	EFI_SNP_MAX_STRING_ID
+};
+
+/** EFI SNP formset */
+struct efi_snp_formset {
+	EFI_HII_PACKAGE_HEADER Header;
+	EFI_IFR_FORM_SET_TYPE(1) FormSet;
+	EFI_IFR_GUID_CLASS Class;
+	EFI_IFR_GUID_SUBCLASS SubClass;
+	EFI_IFR_FORM Form;
+	EFI_IFR_TEXT ProductText;
+	EFI_IFR_TEXT VersionText;
+	EFI_IFR_TEXT DriverText;
+	EFI_IFR_TEXT DeviceText;
+	EFI_IFR_END EndForm;
+	EFI_IFR_END EndFormSet;
+} __attribute__ (( packed )) efi_snp_formset = {
+	.Header = {
+		.Length = sizeof ( efi_snp_formset ),
+		.Type = EFI_HII_PACKAGE_FORMS,
+	},
+	.FormSet = EFI_IFR_FORM_SET ( EFI_SNP_FORMSET_GUID,
+				      EFI_SNP_FORMSET_TITLE,
+				      EFI_SNP_FORMSET_HELP,
+				      typeof ( efi_snp_formset.FormSet ),
+				      EFI_HII_PLATFORM_SETUP_FORMSET_GUID ),
+	.Class = EFI_IFR_GUID_CLASS ( EFI_NETWORK_DEVICE_CLASS ),
+	.SubClass = EFI_IFR_GUID_SUBCLASS ( 0x03 ),
+	.Form = EFI_IFR_FORM ( EFI_SNP_FORM, EFI_SNP_FORMSET_TITLE ),
+	.ProductText = EFI_IFR_TEXT ( EFI_SNP_PRODUCT_PROMPT,
+				      EFI_SNP_PRODUCT_HELP,
+				      EFI_SNP_PRODUCT_TEXT ),
+	.VersionText = EFI_IFR_TEXT ( EFI_SNP_VERSION_PROMPT,
+				      EFI_SNP_VERSION_HELP,
+				      EFI_SNP_VERSION_TEXT ),
+	.DriverText = EFI_IFR_TEXT ( EFI_SNP_DRIVER_PROMPT,
+				     EFI_SNP_DRIVER_HELP,
+				     EFI_SNP_DRIVER_TEXT ),
+	.DeviceText = EFI_IFR_TEXT ( EFI_SNP_DEVICE_PROMPT,
+				     EFI_SNP_DEVICE_HELP,
+				     EFI_SNP_DEVICE_TEXT ),
+	.EndForm = EFI_IFR_END(),
+	.EndFormSet = EFI_IFR_END(),
+};
+
+/**
+ * Generate EFI SNP string
+ *
+ * @v wbuf		Buffer
+ * @v swlen		Size of buffer (in wide characters)
+ * @v snpdev		SNP device
+ * @ret wlen		Length of string (in wide characters)
+ */
+static int efi_snp_string ( wchar_t *wbuf, ssize_t swlen,
+			    enum efi_snp_hii_string_id id,
+			    struct efi_snp_device *snpdev ) {
+	struct net_device *netdev = snpdev->netdev;
+	struct device *dev = netdev->dev;
+
+	switch ( id ) {
+	case EFI_SNP_LANGUAGE_NAME:
+		return efi_ssnprintf ( wbuf, swlen, "English" );
+	case EFI_SNP_FORMSET_TITLE:
+		return efi_ssnprintf ( wbuf, swlen, "%s (%s)",
+				       ( PRODUCT_NAME[0] ?
+					 PRODUCT_NAME : PRODUCT_SHORT_NAME ),
+				       netdev_addr ( netdev ) );
+	case EFI_SNP_FORMSET_HELP:
+		return efi_ssnprintf ( wbuf, swlen,
+				       "Configure " PRODUCT_SHORT_NAME );
+	case EFI_SNP_PRODUCT_PROMPT:
+		return efi_ssnprintf ( wbuf, swlen, "Name" );
+	case EFI_SNP_PRODUCT_HELP:
+		return efi_ssnprintf ( wbuf, swlen, "Firmware product name" );
+	case EFI_SNP_PRODUCT_TEXT:
+		return efi_ssnprintf ( wbuf, swlen, "%s",
+				       ( PRODUCT_NAME[0] ?
+					 PRODUCT_NAME : PRODUCT_SHORT_NAME ) );
+	case EFI_SNP_VERSION_PROMPT:
+		return efi_ssnprintf ( wbuf, swlen, "Version" );
+	case EFI_SNP_VERSION_HELP:
+		return efi_ssnprintf ( wbuf, swlen, "Firmware version" );
+	case EFI_SNP_VERSION_TEXT:
+		return efi_ssnprintf ( wbuf, swlen, VERSION );
+	case EFI_SNP_DRIVER_PROMPT:
+		return efi_ssnprintf ( wbuf, swlen, "Driver" );
+	case EFI_SNP_DRIVER_HELP:
+		return efi_ssnprintf ( wbuf, swlen, "Firmware driver" );
+	case EFI_SNP_DRIVER_TEXT:
+		return efi_ssnprintf ( wbuf, swlen, "%s", dev->driver_name );
+	case EFI_SNP_DEVICE_PROMPT:
+		return efi_ssnprintf ( wbuf, swlen, "Device" );
+	case EFI_SNP_DEVICE_HELP:
+		return efi_ssnprintf ( wbuf, swlen, "Hardware device" );
+	case EFI_SNP_DEVICE_TEXT:
+		return efi_ssnprintf ( wbuf, swlen, "%s", dev->name );
+	default:
+		assert ( 0 );
+		return 0;
+	}
+}
+
+/**
+ * Generate EFI SNP string package
+ *
+ * @v strings		String package header buffer
+ * @v max_len		Buffer length
+ * @v snpdev		SNP device
+ * @ret len		Length of string package
+ */
+static int efi_snp_strings ( EFI_HII_STRING_PACKAGE_HDR *strings,
+			     size_t max_len, struct efi_snp_device *snpdev ) {
+	static const char language[] = "en-us";
+	void *buf = strings;
+	ssize_t remaining = max_len;
+	size_t hdrsize;
+	EFI_HII_SIBT_STRING_UCS2_BLOCK *string;
+	ssize_t wremaining;
+	size_t string_wlen;
+	unsigned int id;
+	EFI_HII_STRING_BLOCK *end;
+	size_t len;
+
+	/* Calculate header size */
+	hdrsize = ( offsetof ( typeof ( *strings ), Language ) +
+		    sizeof ( language ) );
+	buf += hdrsize;
+	remaining -= hdrsize;
+
+	/* Fill in strings */
+	for ( id = 1 ; id < EFI_SNP_MAX_STRING_ID ; id++ ) {
+		string = buf;
+		if ( remaining >= ( ( ssize_t ) sizeof ( string->Header ) ) )
+			string->Header.BlockType = EFI_HII_SIBT_STRING_UCS2;
+		buf += offsetof ( typeof ( *string ), StringText );
+		remaining -= offsetof ( typeof ( *string ), StringText );
+		wremaining = ( remaining /
+			       ( ( ssize_t ) sizeof ( string->StringText[0] )));
+		assert ( ! ( ( remaining <= 0 ) && ( wremaining > 0 ) ) );
+		string_wlen = efi_snp_string ( string->StringText, wremaining,
+					       id, snpdev );
+		buf += ( ( string_wlen + 1 /* wNUL */ ) *
+			 sizeof ( string->StringText[0] ) );
+		remaining -= ( ( string_wlen + 1 /* wNUL */ ) *
+			       sizeof ( string->StringText[0] ) );
+	}
+
+	/* Fill in end marker */
+	end = buf;
+	if ( remaining >= ( ( ssize_t ) sizeof ( *end ) ) )
+		end->BlockType = EFI_HII_SIBT_END;
+	buf += sizeof ( *end );
+	remaining -= sizeof ( *end );
+
+	/* Calculate overall length */
+	len = ( max_len - remaining );
+
+	/* Fill in string package header */
+	if ( strings ) {
+		memset ( strings, 0, sizeof ( *strings ) );
+		strings->Header.Length = len;
+		strings->Header.Type = EFI_HII_PACKAGE_STRINGS;
+		strings->HdrSize = hdrsize;
+		strings->StringInfoOffset = hdrsize;
+		strings->LanguageName = EFI_SNP_LANGUAGE_NAME;
+		memcpy ( strings->Language, language, sizeof ( language ) );
+	}
+
+	return len;
+}
+
+/**
+ * Generate EFI SNP package list
+ *
+ * @v snpdev		SNP device
+ * @ret package_list	Package list, or NULL on error
+ *
+ * The package list is allocated using malloc(), and must eventually
+ * be freed by the caller.
+ */
+static EFI_HII_PACKAGE_LIST_HEADER *
+efi_snp_package_list ( struct efi_snp_device *snpdev ) {
+	size_t strings_len = efi_snp_strings ( NULL, 0, snpdev );
+	struct {
+		EFI_HII_PACKAGE_LIST_HEADER header;
+		struct efi_snp_formset formset;
+		union {
+			EFI_HII_STRING_PACKAGE_HDR strings;
+			uint8_t pad[strings_len];
+		} __attribute__ (( packed )) strings;
+		EFI_HII_PACKAGE_HEADER end;
+	} __attribute__ (( packed )) *package_list;
+
+	/* Allocate package list */
+	package_list = zalloc ( sizeof ( *package_list ) );
+	if ( ! package_list )
+		return NULL;
+
+	/* Populate package list */
+	memcpy ( &package_list->header.PackageListGuid,
+		 &efi_snp_formset.FormSet.FormSet.Guid,
+		 sizeof ( package_list->header.PackageListGuid ) );
+	package_list->header.PackageLength = sizeof ( *package_list );
+	memcpy ( &package_list->formset, &efi_snp_formset,
+		 sizeof ( package_list->formset ) );
+	efi_snp_strings ( &package_list->strings.strings,
+			  sizeof ( package_list->strings ), snpdev );
+	package_list->end.Length = sizeof ( package_list->end );
+	package_list->end.Type = EFI_HII_PACKAGE_END;
+
+	return &package_list->header;
+}
+
+/**
+ * Fetch configuration
+ *
+ * @v hii		HII configuration access protocol
+ * @v request		Configuration to fetch
+ * @ret progress	Progress made through configuration to fetch
+ * @ret results		Query results
+ * @ret efirc		EFI status code
+ */
+static EFI_STATUS EFIAPI
+efi_snp_hii_extract_config ( const EFI_HII_CONFIG_ACCESS_PROTOCOL *hii,
+			     EFI_STRING request, EFI_STRING *progress,
+			     EFI_STRING *results __unused ) {
+	struct efi_snp_device *snpdev =
+		container_of ( hii, struct efi_snp_device, hii );
+
+	DBGC ( snpdev, "SNPDEV %p ExtractConfig\n", snpdev );
+
+	*progress = request;
+	return EFI_INVALID_PARAMETER;
+}
+
+/**
+ * Store configuration
+ *
+ * @v hii		HII configuration access protocol
+ * @v config		Configuration to store
+ * @ret progress	Progress made through configuration to store
+ * @ret efirc		EFI status code
+ */
+static EFI_STATUS EFIAPI
+efi_snp_hii_route_config ( const EFI_HII_CONFIG_ACCESS_PROTOCOL *hii,
+			   EFI_STRING config, EFI_STRING *progress ) {
+	struct efi_snp_device *snpdev =
+		container_of ( hii, struct efi_snp_device, hii );
+
+	DBGC ( snpdev, "SNPDEV %p RouteConfig\n", snpdev );
+
+	*progress = config;
+	return EFI_INVALID_PARAMETER;
+}
+
+/**
+ * Handle form actions
+ *
+ * @v hii		HII configuration access protocol
+ * @v action		Form browser action
+ * @v question_id	Question ID
+ * @v type		Type of value
+ * @v value		Value
+ * @ret action_request	Action requested by driver
+ * @ret efirc		EFI status code
+ */
+static EFI_STATUS EFIAPI
+efi_snp_hii_callback ( const EFI_HII_CONFIG_ACCESS_PROTOCOL *hii,
+		       EFI_BROWSER_ACTION action __unused,
+		       EFI_QUESTION_ID question_id __unused,
+		       UINT8 type __unused, EFI_IFR_TYPE_VALUE *value __unused,
+		       EFI_BROWSER_ACTION_REQUEST *action_request __unused ) {
+	struct efi_snp_device *snpdev =
+		container_of ( hii, struct efi_snp_device, hii );
+
+	DBGC ( snpdev, "SNPDEV %p Callback\n", snpdev );
+	return EFI_UNSUPPORTED;
+}
+
+/** HII configuration access protocol */
+static EFI_HII_CONFIG_ACCESS_PROTOCOL efi_snp_device_hii = {
+	.ExtractConfig	= efi_snp_hii_extract_config,
+	.RouteConfig	= efi_snp_hii_route_config,
+	.Callback	= efi_snp_hii_callback,
+};
+
+/******************************************************************************
+ *
+ * iPXE network driver
+ *
+ ******************************************************************************
+ */
+
 /**
  * Locate SNP device corresponding to network device
  *
@@ -830,6 +1173,9 @@ static int efi_snp_probe ( struct net_device *netdev ) {
 	strncpy ( snpdev->nii.StringId, "iPXE",
 		  sizeof ( snpdev->nii.StringId ) );
 
+	/* Populate the HII configuration access structure */
+	memcpy ( &snpdev->hii, &efi_snp_device_hii, sizeof ( snpdev->hii ) );
+
 	/* Populate the device name */
 	efi_snprintf ( snpdev->name, ( sizeof ( snpdev->name ) /
 				       sizeof ( snpdev->name[0] ) ),
@@ -858,6 +1204,7 @@ static int efi_snp_probe ( struct net_device *netdev ) {
 			&efi_device_path_protocol_guid, &snpdev->path,
 			&efi_nii_protocol_guid, &snpdev->nii,
 			&efi_nii31_protocol_guid, &snpdev->nii,
+			&efi_hii_config_access_protocol_guid, &snpdev->hii,
 			NULL ) ) != 0 ) {
 		DBGC ( snpdev, "SNPDEV %p could not install protocols: "
 		       "%s\n", snpdev, efi_strerror ( efirc ) );
@@ -874,6 +1221,25 @@ static int efi_snp_probe ( struct net_device *netdev ) {
 		goto err_efipci_child_add;
 	}
 
+	/* Create HII package list */
+	snpdev->package_list = efi_snp_package_list ( snpdev );
+	if ( ! snpdev->package_list ) {
+		DBGC ( snpdev, "SNPDEV %p could not create HII package list\n",
+		       snpdev );
+		rc = -ENOMEM;
+		goto err_create_hii;
+	}
+
+	/* Add HII packages */
+	if ( ( efirc = efihii->NewPackageList ( efihii, snpdev->package_list,
+						snpdev->handle,
+						&snpdev->hii_handle ) ) != 0 ) {
+		DBGC ( snpdev, "SNPDEV %p could not add HII packages: %s\n",
+		       snpdev, efi_strerror ( efirc ) );
+		rc = EFIRC_TO_RC ( efirc );
+		goto err_register_hii;
+	}
+
 	/* Add to list of SNP devices */
 	list_add ( &snpdev->list, &efi_snp_devices );
 
@@ -881,6 +1247,10 @@ static int efi_snp_probe ( struct net_device *netdev ) {
 	       snpdev, netdev->name, snpdev->handle );
 	return 0;
 
+	efihii->RemovePackageList ( efihii, snpdev->hii_handle );
+ err_register_hii:
+	free ( snpdev->package_list );
+ err_create_hii:
 	efipci_child_del ( efipci, snpdev->handle );
  err_efipci_child_add:
 	bs->UninstallMultipleProtocolInterfaces (
@@ -889,6 +1259,7 @@ static int efi_snp_probe ( struct net_device *netdev ) {
 			&efi_device_path_protocol_guid, &snpdev->path,
 			&efi_nii_protocol_guid, &snpdev->nii,
 			&efi_nii31_protocol_guid, &snpdev->nii,
+			&efi_hii_config_access_protocol_guid, &snpdev->hii,
 			NULL );
  err_install_protocol_interface:
 	bs->CloseEvent ( snpdev->snp.WaitForPacket );
@@ -927,6 +1298,8 @@ static void efi_snp_remove ( struct net_device *netdev ) {
 	}
 
 	/* Uninstall the SNP */
+	efihii->RemovePackageList ( efihii, snpdev->hii_handle );
+	free ( snpdev->package_list );
 	efipci_child_del ( snpdev->efipci, snpdev->handle );
 	list_del ( &snpdev->list );
 	bs->UninstallMultipleProtocolInterfaces (
@@ -935,6 +1308,7 @@ static void efi_snp_remove ( struct net_device *netdev ) {
 			&efi_device_path_protocol_guid, &snpdev->path,
 			&efi_nii_protocol_guid, &snpdev->nii,
 			&efi_nii31_protocol_guid, &snpdev->nii,
+			&efi_hii_config_access_protocol_guid, &snpdev->hii,
 			NULL );
 	bs->CloseEvent ( snpdev->snp.WaitForPacket );
 	netdev_put ( snpdev->netdev );