@@ -45,3 +45,34 @@ ums-realtek-y := realtek_cr.o
ums-sddr09-y := sddr09.o
ums-sddr55-y := sddr55.o
ums-usbat-y := shuttle_usbat.o
+
+# The mkflags host-compiled generator produces usb-ids.c (usb-storage)
+# and usb-ids-uas.c (uas) with USB device tables.
+# These tables include pre-computed 32-bit values, as USB driver_info
+# (where the value is stored) can be only 32-bit.
+# The most significant bit means it is index to 64-bit pre-computed table
+# generated by mkflags host-compiled program.
+# Currently used only by mass-storage and uas driver.
+
+$(obj)/usual-tables.o: $(obj)/usb-ids.c
+$(obj)/uas.o: $(obj)/usb-ids-uas.c
+clean-files := usb-ids.c usb-ids-uas.c
+HOSTCFLAGS_mkflags.o := -I $(srctree)/include/
+ifdef CONFIG_64BIT
+HOSTCFLAGS_mkflags.o += -D CONFIG_64BIT=1
+else
+HOSTCFLAGS_mkflags.o += -D CONFIG_64BIT=0
+endif
+hostprogs += mkflags
+
+quiet_cmd_mkflag_storage = FLAGS $@
+cmd_mkflag_storage = $(obj)/mkflags storage > $@
+
+quiet_cmd_mkflag_uas = FLAGS $@
+cmd_mkflag_uas = $(obj)/mkflags uas > $@
+
+$(obj)/usb-ids.c: $(obj)/mkflags
+ $(call cmd,mkflag_storage)
+
+$(obj)/usb-ids-uas.c: $(obj)/mkflags
+ $(call cmd,mkflag_uas)
new file mode 100644
@@ -0,0 +1,233 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+/*
+ * This is host-compiled generator for usb-ids.c (usb-storage)
+ * and usb-ids-uas.c (uas).
+ *
+ * Generated files contain pre-computed 32-bit values, as USB
+ * driver_info (where the value is stored) can be only 32-bit.
+ * The most significant bit means that it is index to 64-bit
+ * pre-computed table named usb_stor_drv_info_u64_table with size
+ * stored in usb_stor_drv_info_u64_table_size (for sanity check).
+ *
+ * Note that usb-storage driver contains also UAS devices, while UAS
+ * driver contains only UAS entries (so there can be duplicates).
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+/*
+ * Cannot use userspace <inttypes.h> as code below
+ * processes internal kernel headers
+ */
+#include <linux/types.h>
+
+/*
+ * Silence warning for definitions in headers we do not use
+ */
+struct usb_device_id {};
+struct usb_interface;
+
+#include <linux/usb_usual.h>
+
+typedef enum { TYPE_DEVICE_STORAGE, TYPE_DEVICE_UAS, TYPE_CLASS } dev_type;
+typedef enum { FLAGS_NOT_SET, FLAGS_SET, FLAGS_DUPLICATE } dev_flags_set;
+#define FLAGS_END (uint64_t)-1
+
+struct unusual_dev_entry {
+ dev_type type;
+
+ /*interface */
+ uint8_t bDeviceSubClass;
+ uint8_t bDeviceProtocol;
+
+ /* device */
+ uint16_t idVendor;
+ uint16_t idProduct;
+ uint16_t bcdDevice_lo;
+ uint16_t bcdDevice_hi;
+
+ uint64_t flags;
+ dev_flags_set set;
+ unsigned int idx;
+};
+
+static struct unusual_dev_entry unusual_dev_entries[] = {
+#define USUAL_DEV(useProto, useTrans) \
+{ TYPE_CLASS, useProto, useTrans, 0, 0, 0, 0, 0, FLAGS_NOT_SET, 0 }
+
+#define COMPLIANT_DEV UNUSUAL_DEV
+#define IS_ENABLED(x) 0
+
+/* usb-storage */
+#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
+ vendorName, productName, useProtocol, useTransport, \
+ initFunction, flags) \
+{ TYPE_DEVICE_STORAGE, 0, 0, id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, flags, FLAGS_NOT_SET, 0 }
+#include "unusual_devs.h"
+#undef UNUSUAL_DEV
+
+/* uas */
+#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
+ vendorName, productName, useProtocol, useTransport, \
+ initFunction, flags) \
+{ TYPE_DEVICE_UAS, 0, 0, id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, flags, FLAGS_NOT_SET, 0 }
+#include "unusual_uas.h"
+#undef UNUSUAL_DEV
+
+/* Terminating entry */
+{ .flags = FLAGS_END }
+};
+#undef USUAL_DEV
+#undef COMPLIANT_DEV
+#undef IS_ENABLED
+
+/* Highest bit indicates it is index to usb_stor_drv_info_u64_table */
+#define HI32 (uint32_t)(1UL << 31)
+
+static uint64_t get_driver_info(uint64_t flags, unsigned int idx)
+{
+ if (CONFIG_64BIT)
+ return flags;
+
+ if (flags < HI32)
+ return flags;
+
+ /* Use index that will be processed in usb_stor_drv_info_to_flags */
+ return HI32 + idx;
+}
+
+static void print_class(uint8_t bDeviceSubClass, uint8_t bDeviceProtocol)
+{
+ printf("\t{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO, ");
+ printf(".bInterfaceClass = USB_CLASS_MASS_STORAGE, ");
+ printf(".bInterfaceSubClass = 0x%x, .bInterfaceProtocol = 0x%x },\n",
+ bDeviceSubClass, bDeviceProtocol);
+}
+static void print_type(dev_type type)
+{
+ for (int i = 0; unusual_dev_entries[i].flags != FLAGS_END; i++) {
+ if (unusual_dev_entries[i].type != type)
+ continue;
+
+ if (type == TYPE_DEVICE_STORAGE || type == TYPE_DEVICE_UAS) {
+ printf("\t{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, ");
+ printf(".idVendor = 0x%04x, .idProduct =0x%04x, "
+ ".bcdDevice_lo = 0x%04x, .bcdDevice_hi = 0x%04x, .driver_info = 0x%llx },\n",
+ unusual_dev_entries[i].idVendor, unusual_dev_entries[i].idProduct,
+ unusual_dev_entries[i].bcdDevice_lo, unusual_dev_entries[i].bcdDevice_hi,
+ get_driver_info(unusual_dev_entries[i].flags, unusual_dev_entries[i].idx));
+ } else if (type == TYPE_CLASS)
+ print_class(unusual_dev_entries[i].bDeviceSubClass, unusual_dev_entries[i].bDeviceProtocol);
+ }
+}
+
+static void print_usb_flags(const char *type)
+{
+ int i, count;
+
+ if (CONFIG_64BIT) {
+ printf("const u64 usb_%s_drv_info_u64_table[] = {};\n", type);
+ printf("const unsigned long usb_%s_drv_info_u64_table_size = 0;\n\n", type);
+ } else {
+ printf("const u64 usb_%s_drv_info_u64_table[] = {\n", type);
+ for (i = 0, count = 0; unusual_dev_entries[i].flags != FLAGS_END; i++) {
+ if (unusual_dev_entries[i].set == FLAGS_SET) {
+ printf("\t/* 0x%02x */ 0x%llx,\n", unusual_dev_entries[i].idx, unusual_dev_entries[i].flags);
+ count++;
+ }
+ }
+ printf("};\n\n");
+ printf("const unsigned long usb_%s_drv_info_u64_table_size = %i;\n\n", type, count);
+ }
+}
+
+static void print_usb_storage(void)
+{
+ printf("#include <linux/usb.h>\n\n");
+
+ /* conversion table from 32-bit device_flags to 64-bit flags */
+ print_usb_flags("stor");
+
+ /* usb_storage_usb_ids */
+ printf("const struct usb_device_id usb_storage_usb_ids[] = {\n");
+
+ /* usb-storage driver devices */
+ print_type(TYPE_DEVICE_STORAGE);
+
+ /* uas driver devices */
+ printf("#if IS_ENABLED(CONFIG_USB_UAS)\n");
+ print_type(TYPE_DEVICE_UAS);
+ printf("#endif\n");
+
+ /* transport subclasses */
+ print_type(TYPE_CLASS);
+
+ printf("\t{ } /* Terminating entry */\n};\n");
+ printf("MODULE_DEVICE_TABLE(usb, usb_storage_usb_ids);\n");
+}
+
+static void print_usb_uas(void)
+{
+ printf("#include <linux/usb.h>\n\n");
+
+ /* conversion table from 32-bit device_flags to 64-bit flags */
+ print_usb_flags("uas");
+
+ /* uas_usb_ids */
+ printf("const struct usb_device_id uas_usb_ids[] = {\n");
+
+ /* uas driver devices */
+ print_type(TYPE_DEVICE_UAS);
+
+ /* transport subclasses */
+ print_class(USB_SC_SCSI, USB_PR_BULK);
+ print_class(USB_SC_SCSI, USB_PR_UAS);
+
+ printf("\t{ } /* Terminating entry */\n};\n");
+ printf("MODULE_DEVICE_TABLE(usb, uas_usb_ids);\n");
+}
+
+int main(int argc, char *argv[])
+{
+ int i, j, idx = 0, idx_old, skip = 0;
+
+ if (argc != 2 || (strcmp(argv[1], "storage") && strcmp(argv[1], "uas"))) {
+ printf("Please specify output type: storage or uas.\n");
+ return 1;
+ }
+
+ for (i = 0; unusual_dev_entries[i].flags != FLAGS_END; i++) {
+ if (unusual_dev_entries[i].type == TYPE_CLASS)
+ continue;
+ skip = 0;
+ if (unusual_dev_entries[i].flags >= HI32) {
+ for (j = 0; j < i; j++) {
+ if (unusual_dev_entries[j].flags == unusual_dev_entries[i].flags &&
+ unusual_dev_entries[j].set == FLAGS_SET) {
+ skip = 1;
+ idx_old = unusual_dev_entries[j].idx;
+ break;
+ }
+ }
+ if (skip) {
+ unusual_dev_entries[i].idx = idx_old;
+ unusual_dev_entries[i].set = FLAGS_DUPLICATE;
+ } else {
+ unusual_dev_entries[i].idx = idx;
+ unusual_dev_entries[i].set = FLAGS_SET;
+ idx++;
+ }
+ }
+ }
+
+ if (!strcmp(argv[1], "storage"))
+ print_usb_storage();
+ else if (!strcmp(argv[1], "uas"))
+ print_usb_uas();
+ else
+ return 1;
+
+ return 0;
+}
@@ -54,12 +54,16 @@ static int uas_find_endpoints(struct usb_host_interface *alt,
static int uas_use_uas_driver(struct usb_interface *intf,
const struct usb_device_id *id,
+ const u64 *drv_info_u64_table,
+ unsigned long drv_info_u64_table_size,
u64 *flags_ret)
{
struct usb_host_endpoint *eps[4] = { };
struct usb_device *udev = interface_to_usbdev(intf);
struct usb_hcd *hcd = bus_to_hcd(udev->bus);
- u64 flags = id->driver_info;
+ u64 flags = usb_stor_drv_info_to_flags(drv_info_u64_table,
+ drv_info_u64_table_size,
+ id->driver_info);
struct usb_host_interface *alt;
int r;
@@ -26,9 +26,13 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
+#include "usb-ids.h"
#include "uas-detect.h"
#include "scsiglue.h"
+/* The table of devices is pre-generated in usb-ids-uas.c */
+#include "usb-ids-uas.c"
+
#define MAX_CMNDS 256
struct uas_dev_info {
@@ -909,22 +913,6 @@ static const struct scsi_host_template uas_host_template = {
.cmd_size = sizeof(struct uas_cmd_info),
};
-#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
- vendorName, productName, useProtocol, useTransport, \
- initFunction, flags) \
-{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
- .driver_info = (flags) }
-
-static struct usb_device_id uas_usb_ids[] = {
-# include "unusual_uas.h"
- { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) },
- { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) },
- { }
-};
-MODULE_DEVICE_TABLE(usb, uas_usb_ids);
-
-#undef UNUSUAL_DEV
-
static int uas_switch_interface(struct usb_device *udev,
struct usb_interface *intf)
{
@@ -990,7 +978,8 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
struct usb_device *udev = interface_to_usbdev(intf);
u64 dev_flags;
- if (!uas_use_uas_driver(intf, id, &dev_flags))
+ if (!uas_use_uas_driver(intf, id, usb_uas_drv_info_u64_table,
+ usb_uas_drv_info_u64_table_size, &dev_flags))
return -ENODEV;
if (uas_switch_interface(udev, intf))
new file mode 100644
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef _USB_STOR_IDS_H_
+#define _USB_STOR_IDS_H_
+
+#include <linux/types.h>
+#include <linux/bug.h>
+
+/* Conversion of 32-bit quirks flags for 32-bit platforms */
+extern const unsigned long usb_stor_drv_info_u64_table_size;
+extern const unsigned long usb_uas_drv_info_u64_table_size;
+extern const u64 usb_stor_drv_info_u64_table[];
+extern const u64 usb_uas_drv_info_u64_table[];
+
+#if IS_ENABLED(CONFIG_64BIT)
+/* 64-bit systems don't need to use the drv_info_64_table */
+static u64 usb_stor_drv_info_to_flags(const u64 *drv_info_u64_table,
+ unsigned long table_size, unsigned long idx)
+{
+ return idx;
+}
+#else
+/* 32-bit systems need to look up flags if bits 31 or beyond are used */
+static u64 usb_stor_drv_info_to_flags(const u64 *drv_info_u64_table,
+ unsigned long table_size, unsigned long idx)
+{
+ u64 flags = 0;
+
+ if (idx < (1UL << 31))
+ return idx;
+
+ idx -= (1UL << 31);
+
+ if (idx < table_size)
+ flags = drv_info_u64_table[idx];
+ else
+ pr_warn_once("usb_stor_drv_info_u64_table not updated");
+
+ return flags;
+}
+#endif
+
+#endif
@@ -56,6 +56,7 @@
#include "sierra_ms.h"
#include "option_ms.h"
+#include "usb-ids.h"
#if IS_ENABLED(CONFIG_USB_UAS)
#include "uas-detect.h"
#endif
@@ -574,7 +575,7 @@ EXPORT_SYMBOL_GPL(usb_stor_adjust_quirks);
/* Get the unusual_devs entries and the string descriptors */
static int get_device_info(struct us_data *us, const struct usb_device_id *id,
- const struct us_unusual_dev *unusual_dev)
+ const struct us_unusual_dev *unusual_dev, int fflags_use_index)
{
struct usb_device *dev = us->pusb_dev;
struct usb_interface_descriptor *idesc =
@@ -589,7 +590,11 @@ static int get_device_info(struct us_data *us, const struct usb_device_id *id,
us->protocol = (unusual_dev->useTransport == USB_PR_DEVICE) ?
idesc->bInterfaceProtocol :
unusual_dev->useTransport;
- us->fflags = id->driver_info;
+ if (fflags_use_index)
+ us->fflags = usb_stor_drv_info_to_flags(usb_stor_drv_info_u64_table,
+ usb_stor_drv_info_u64_table_size, id->driver_info);
+ else
+ us->fflags = id->driver_info;
usb_stor_adjust_quirks(us->pusb_dev, &us->fflags);
if (us->fflags & US_FL_IGNORE_DEVICE) {
@@ -921,11 +926,12 @@ static unsigned int usb_stor_sg_tablesize(struct usb_interface *intf)
}
/* First part of general USB mass-storage probing */
-int usb_stor_probe1(struct us_data **pus,
+static int usb_stor_probe1_fflags(struct us_data **pus,
struct usb_interface *intf,
const struct usb_device_id *id,
const struct us_unusual_dev *unusual_dev,
- const struct scsi_host_template *sht)
+ const struct scsi_host_template *sht,
+ int fflags_use_index)
{
struct Scsi_Host *host;
struct us_data *us;
@@ -962,7 +968,7 @@ int usb_stor_probe1(struct us_data **pus,
goto BadDevice;
/* Get the unusual_devs entries and the descriptors */
- result = get_device_info(us, id, unusual_dev);
+ result = get_device_info(us, id, unusual_dev, fflags_use_index);
if (result)
goto BadDevice;
@@ -981,6 +987,15 @@ int usb_stor_probe1(struct us_data **pus,
release_everything(us);
return result;
}
+
+int usb_stor_probe1(struct us_data **pus,
+ struct usb_interface *intf,
+ const struct usb_device_id *id,
+ const struct us_unusual_dev *unusual_dev,
+ const struct scsi_host_template *sht)
+{
+ return usb_stor_probe1_fflags(pus, intf, id, unusual_dev, sht, 0);
+}
EXPORT_SYMBOL_GPL(usb_stor_probe1);
/* Second part of general USB mass-storage probing */
@@ -1090,7 +1105,8 @@ static int storage_probe(struct usb_interface *intf,
/* If uas is enabled and this device can do uas then ignore it. */
#if IS_ENABLED(CONFIG_USB_UAS)
- if (uas_use_uas_driver(intf, id, NULL))
+ if (uas_use_uas_driver(intf, id, usb_stor_drv_info_u64_table,
+ usb_stor_drv_info_u64_table_size, NULL))
return -ENXIO;
#endif
@@ -1119,8 +1135,8 @@ static int storage_probe(struct usb_interface *intf,
id->idVendor, id->idProduct);
}
- result = usb_stor_probe1(&us, intf, id, unusual_dev,
- &usb_stor_host_template);
+ result = usb_stor_probe1_fflags(&us, intf, id, unusual_dev,
+ &usb_stor_host_template, 1);
if (result)
return result;
@@ -13,28 +13,9 @@
/*
- * The table of devices
+ * The table of devices is pre-generated in usb-ids.c
*/
-#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
- vendorName, productName, useProtocol, useTransport, \
- initFunction, flags) \
-{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
- .driver_info = (kernel_ulong_t)(flags) }
-
-#define COMPLIANT_DEV UNUSUAL_DEV
-
-#define USUAL_DEV(useProto, useTrans) \
-{ USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, useProto, useTrans) }
-
-const struct usb_device_id usb_storage_usb_ids[] = {
-# include "unusual_devs.h"
- { } /* Terminating entry */
-};
-MODULE_DEVICE_TABLE(usb, usb_storage_usb_ids);
-
-#undef UNUSUAL_DEV
-#undef COMPLIANT_DEV
-#undef USUAL_DEV
+#include "usb-ids.c"
/*
* The table of devices to ignore
The USB mass storage quirks flags can be stored in driver_info in a 32-bit integer (unsigned long on 32-bit platforms). As this attribute cannot be enlarged, we need to use some form of translation of 64-bit quirk bits. This problem was discussed on the USB list https://lore.kernel.org/linux-usb/f9e8acb5-32d5-4a30-859f-d4336a86b31a@gmail.com/ The initial solution to use a static array extensively increased the size of the kernel module, so I decided to try the second suggested solution: generate a table by host-compiled program and use bit 31 to indicate that the value is an index, not the actual value. This patch adds a host-compiled program that processes unusual_devs.h (and unusual_uas.h) and generates files usb-ids.c and usb-ids-uas.c (for pre-processed USB device table with 32-bit device info). These files also contain a generated translation table for driver_info to 64-bit values. The translation function is used only in usb-storage and uas modules; all other USB storage modules store flags directly, using only 32-bit flags. For 64-bit platforms, where unsigned long is 64-bit, we do not need to convert quirk flags to 32-bit index; the translation function there uses flags directly. Signed-off-by: Milan Broz <gmazyland@gmail.com> --- Changes from v3 - Include changes from Alan Stern review - Make unusual*.h mkflags dependences implicit in Makefile - Avoid conditional macros in function definition (usb-ids.h) Changes from v2 - Rebased to usb-testing tree - Include changes from Alan Stern and Greg KH reviews (thanks!) - Remove FORCE from Makefile add explicit dependence on unusual*.h headers - Avoid use of #ifdef (mkflags.c need -D CONFIG_64BIT=X flag now) - Use drv_info in functions and variable names (instead of di) - Use wrapper for usb_stor_probe1(), this simplifies the previous separate patch (no need to touch other drivers) so it can be merged here directly - Merge 64bit optimization to this patch too Changes from v1 - Separate flags generation from OPAL command patchset (it means there is currently no quirk flag that requires this patch yet) drivers/usb/storage/Makefile | 31 ++++ drivers/usb/storage/mkflags.c | 233 +++++++++++++++++++++++++++++ drivers/usb/storage/uas-detect.h | 6 +- drivers/usb/storage/uas.c | 23 +-- drivers/usb/storage/usb-ids.h | 43 ++++++ drivers/usb/storage/usb.c | 32 +++- drivers/usb/storage/usual-tables.c | 23 +-- 7 files changed, 344 insertions(+), 47 deletions(-) create mode 100644 drivers/usb/storage/mkflags.c create mode 100644 drivers/usb/storage/usb-ids.h