uas: MS UAS Gadget driver - Infrastructure

PATCH Superseded Tatyana Brokhman 1 participant 1 message Mar 7, 2011

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Tatyana Brokhman

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2011-03-07 16:47 UTC #0 lore raw

PATCH v2 2/5 uas: MS UAS Gadget driver - Infrastructure

This patch implements the infrastructure for the UAS gadget driver. The UAS gadget driver registers as a second configuration of the MS gadet driver.

A new module parameter was added to the mass_storage module:
bool use_uasp. (default = 0)
If this parameter is set to true, the mass_storage module will register with the UAS configuration as the devices first configuration and operate according to the UAS protocol.

The number of buffers used by the mass_storage device was increased according to the number of supported streams.

It defines the API for COMMAND/TASK MANAGEMENT IU implementation.

Signed-off-by Tatyana Brokhman <[email protected]>

drivers/usb/gadget/f_mass_storage.c +15 ~~-11~~

index a688d04..e79ac84 100644
@@ -2734,7 +2734,8 @@ static inline void fsg_common_put(struct fsg_common *common)
 
 static struct fsg_common *fsg_common_init(struct fsg_common *common,
 					  struct usb_composite_dev *cdev,
-					  struct fsg_config *cfg)
+					  struct fsg_config *cfg,
+					  int start_thread)
 {
 	struct usb_gadget *gadget = cdev->gadget;
 	struct fsg_buffhd *bh;

@@ -2883,12 +2884,14 @@ buffhds_first_it:
 	kref_init(&common->ref);
 
 	/* Tell the thread to start working */
-	common->thread_task =
-		kthread_create(fsg_main_thread, common,
+	if (start_thread) {
+		common->thread_task =
+			kthread_create(fsg_main_thread, common,
 			       cfg->thread_name ?: "file-storage");
-	if (IS_ERR(common->thread_task)) {
-		rc = PTR_ERR(common->thread_task);
-		goto error_release;
+		if (IS_ERR(common->thread_task)) {
+			rc = PTR_ERR(common->thread_task);
+			goto error_release;
+		}
 	}
 	init_completion(&common->thread_notifier);
 	init_waitqueue_head(&common->fsg_wait);

@@ -2919,10 +2922,11 @@ buffhds_first_it:
 	}
 	kfree(pathbuf);
 
-	DBG(common, "I/O thread pid: %d\n", task_pid_nr(common->thread_task));
-
-	wake_up_process(common->thread_task);
-
+	if (start_thread) {
+		DBG(common, "I/O thread pid: %d\n",
+		    task_pid_nr(common->thread_task));
+		wake_up_process(common->thread_task);
+	}
 	return common;
 
 error_luns:

@@ -3190,6 +3194,6 @@ fsg_common_from_params(struct fsg_common *common,
 {
 	struct fsg_config cfg;
 	fsg_config_from_params(&cfg, params);
-	return fsg_common_init(common, cdev, &cfg);
+	return fsg_common_init(common, cdev, &cfg, 1);
 }

drivers/usb/gadget/f_uasp.c new file +2454 -0

2,454 lines not on this page · raw message

drivers/usb/gadget/f_uasp.h new file +395 -0

395 lines not on this page · raw message

drivers/usb/gadget/mass_storage.c +61 -6

100 lines not on this page · raw message

drivers/usb/gadget/storage_common.c +15 -4

index b015561..d33d73c 100644
@@ -220,6 +220,7 @@ struct interrupt_data {
 #define SS_UNRECOVERED_READ_ERROR		0x031100
[… more lines in the raw message]

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drivers/usb/gadget/uasp_cmdiu.c new file +520 -0

520 lines not on this page · raw message

drivers/usb/gadget/uasp_tmiu.c new file +283 -0

283 lines not on this page · raw message

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Signature · 9 lines

1.7.0.4

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