summaryrefslogtreecommitdiffstats
path: root/sound/pci/ctxfi/ctvmem.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/pci/ctxfi/ctvmem.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/pci/ctxfi/ctvmem.h')
-rw-r--r--sound/pci/ctxfi/ctvmem.h60
1 files changed, 60 insertions, 0 deletions
diff --git a/sound/pci/ctxfi/ctvmem.h b/sound/pci/ctxfi/ctvmem.h
new file mode 100644
index 0000000000..da54cbcdb0
--- /dev/null
+++ b/sound/pci/ctxfi/ctvmem.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
+ *
+ * @File ctvmem.h
+ *
+ * @Brief
+ * This file contains the definition of virtual memory management object
+ * for card device.
+ *
+ * @Author Liu Chun
+ * @Date Mar 28 2008
+ */
+
+#ifndef CTVMEM_H
+#define CTVMEM_H
+
+#define CT_PTP_NUM 4 /* num of device page table pages */
+
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <sound/memalloc.h>
+
+/* The chip can handle the page table of 4k pages
+ * (emu20k1 can handle even 8k pages, but we don't use it right now)
+ */
+#define CT_PAGE_SIZE 4096
+#define CT_PAGE_SHIFT 12
+#define CT_PAGE_MASK (~(PAGE_SIZE - 1))
+#define CT_PAGE_ALIGN(addr) ALIGN(addr, CT_PAGE_SIZE)
+
+struct ct_vm_block {
+ unsigned int addr; /* starting logical addr of this block */
+ unsigned int size; /* size of this device virtual mem block */
+ struct list_head list;
+};
+
+struct snd_pcm_substream;
+
+/* Virtual memory management object for card device */
+struct ct_vm {
+ struct snd_dma_buffer ptp[CT_PTP_NUM]; /* Device page table pages */
+ unsigned int size; /* Available addr space in bytes */
+ struct list_head unused; /* List of unused blocks */
+ struct list_head used; /* List of used blocks */
+ struct mutex lock;
+
+ /* Map host addr (kmalloced/vmalloced) to device logical addr. */
+ struct ct_vm_block *(*map)(struct ct_vm *, struct snd_pcm_substream *,
+ int size);
+ /* Unmap device logical addr area. */
+ void (*unmap)(struct ct_vm *, struct ct_vm_block *block);
+ dma_addr_t (*get_ptp_phys)(struct ct_vm *vm, int index);
+};
+
+int ct_vm_create(struct ct_vm **rvm, struct pci_dev *pci);
+void ct_vm_destroy(struct ct_vm *vm);
+
+#endif /* CTVMEM_H */