USB: Support physical-vector bulk requests.

Introduce a new utility method, "generic_memcpy", which takes
generic_addr_t plus indications of whether these specify virtual or
physical addresses (and potentially user addresess) and calls the
appropriate memcpy variant depending.

All bus drivers adjusted to support this at once. We don't actually
take advantage of the physical addresses in any way (yet), as USB
controllers have some pretty specific requirements that would have
to be carefully validated to use these directly.

All bus drivers tested and confirmed to still be working.

Change-Id: I66326667e148091147bb2b3d0843a26fb7e5bda6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6479
Reviewed-by: waddlesplash <[email protected]>

headers/private/kernel/util/iovec_support.h

@@ -15,7 +15,32 @@ typedef struct generic_io_vec {
 } generic_io_vec;
 
 
+#ifdef _KERNEL_VM_VM_H
+
+static inline status_t
+generic_memcpy(generic_addr_t dest, bool destPhysical, generic_addr_t src, bool srcPhysical,
+	generic_size_t size, bool user = false)
+{
+	if (!srcPhysical && !destPhysical) {
+		if (user)
+			return user_memcpy((void*)dest, (void*)src, size);
+		memcpy((void*)dest, (void*)src, size);
+		return B_OK;
+	} else if (destPhysical && !srcPhysical) {
+		return vm_memcpy_to_physical(dest, (const void*)src, size, user);
+	} else if (!destPhysical && srcPhysical) {
+		return vm_memcpy_from_physical((void*)dest, src, size, user);
+	}
+
+	panic("generic_memcpy: physical -> physical not supported!");
+	return B_NOT_SUPPORTED;
+}
+
+#endif
+
+
 #ifdef IS_USER_ADDRESS
+
 static inline status_t
 get_iovecs_from_user(const iovec* userVecs, size_t vecCount, iovec*& vecs,
 	bool permitNull = false)
@@ -53,6 +78,7 @@ get_iovecs_from_user(const iovec* userVecs, size_t vecCount, iovec*& vecs,
 
 	return B_OK;
 }
+
 #endif