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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-09 20:46:45 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-09 20:46:45 +0400
commit1763e735b0a093a6747078b3bd101f079e576ab6 (patch)
tree75203a3229977d12dc5a5990d1122e7a3d5f30fc /include
parentb29bdba51924f6fd5971352ba111784dee3a5853 (diff)
parent3065c194670b61e213656ce25976d7c8a95e3c93 (diff)
downloadlinux-1763e735b0a093a6747078b3bd101f079e576ab6.tar.xz
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul: "This time we have dmatest improvements from Andy along with dw_dmac fixes. He has also done support for acpi for dmanegine. Also we have bunch of fixes going in DT support for dmanegine for various folks. Then Haswell and other ioat changes from Dave and SUDMAC support from Shimoda." * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (53 commits) dma: tegra: implement suspend/resume callbacks dma:of: Use a mutex to protect the of_dma_list dma: of: Fix of_node reference leak dmaengine: sirf: move driver init from module_init to subsys_initcall sudmac: add support for SUDMAC dma: sh: add Kconfig at_hdmac: move to generic DMA binding ioatdma: ioat3_alloc_sed can be static ioatdma: Adding write back descriptor error status support for ioatdma 3.3 ioatdma: S1200 platforms ioatdma channel 2 and 3 falsely advertise RAID cap ioatdma: Adding support for 16 src PQ ops and super extended descriptors ioatdma: Removing hw bug workaround for CB3.x .2 and earlier dw_dmac: add ACPI support dmaengine: call acpi_dma_request_slave_channel as well dma: acpi-dma: introduce ACPI DMA helpers dma: of: Remove unnecessary list_empty check DMA: OF: Check properties value before running be32_to_cpup() on it DMA: of: Constant names ioatdma: skip silicon bug workaround for pq_align for cb3.3 ioatdma: Removing PQ val disable for cb3.3 ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/acpi_dma.h116
-rw-r--r--include/linux/dmaengine.h15
-rw-r--r--include/linux/of_dma.h10
-rw-r--r--include/linux/sudmac.h52
4 files changed, 180 insertions, 13 deletions
diff --git a/include/linux/acpi_dma.h b/include/linux/acpi_dma.h
new file mode 100644
index 000000000000..d09deabc7bf6
--- /dev/null
+++ b/include/linux/acpi_dma.h
@@ -0,0 +1,116 @@
+/*
+ * ACPI helpers for DMA request / controller
+ *
+ * Based on of_dma.h
+ *
+ * Copyright (C) 2013, Intel Corporation
+ * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_ACPI_DMA_H
+#define __LINUX_ACPI_DMA_H
+
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/dmaengine.h>
+
+/**
+ * struct acpi_dma_spec - slave device DMA resources
+ * @chan_id: channel unique id
+ * @slave_id: request line unique id
+ * @dev: struct device of the DMA controller to be used in the filter
+ * function
+ */
+struct acpi_dma_spec {
+ int chan_id;
+ int slave_id;
+ struct device *dev;
+};
+
+/**
+ * struct acpi_dma - representation of the registered DMAC
+ * @dma_controllers: linked list node
+ * @dev: struct device of this controller
+ * @acpi_dma_xlate: callback function to find a suitable channel
+ * @data: private data used by a callback function
+ */
+struct acpi_dma {
+ struct list_head dma_controllers;
+ struct device *dev;
+ struct dma_chan *(*acpi_dma_xlate)
+ (struct acpi_dma_spec *, struct acpi_dma *);
+ void *data;
+};
+
+/* Used with acpi_dma_simple_xlate() */
+struct acpi_dma_filter_info {
+ dma_cap_mask_t dma_cap;
+ dma_filter_fn filter_fn;
+};
+
+#ifdef CONFIG_DMA_ACPI
+
+int acpi_dma_controller_register(struct device *dev,
+ struct dma_chan *(*acpi_dma_xlate)
+ (struct acpi_dma_spec *, struct acpi_dma *),
+ void *data);
+int acpi_dma_controller_free(struct device *dev);
+int devm_acpi_dma_controller_register(struct device *dev,
+ struct dma_chan *(*acpi_dma_xlate)
+ (struct acpi_dma_spec *, struct acpi_dma *),
+ void *data);
+void devm_acpi_dma_controller_free(struct device *dev);
+
+struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev,
+ size_t index);
+struct dma_chan *acpi_dma_request_slave_chan_by_name(struct device *dev,
+ const char *name);
+
+struct dma_chan *acpi_dma_simple_xlate(struct acpi_dma_spec *dma_spec,
+ struct acpi_dma *adma);
+#else
+
+static inline int acpi_dma_controller_register(struct device *dev,
+ struct dma_chan *(*acpi_dma_xlate)
+ (struct acpi_dma_spec *, struct acpi_dma *),
+ void *data)
+{
+ return -ENODEV;
+}
+static inline int acpi_dma_controller_free(struct device *dev)
+{
+ return -ENODEV;
+}
+static inline int devm_acpi_dma_controller_register(struct device *dev,
+ struct dma_chan *(*acpi_dma_xlate)
+ (struct acpi_dma_spec *, struct acpi_dma *),
+ void *data)
+{
+ return -ENODEV;
+}
+static inline void devm_acpi_dma_controller_free(struct device *dev)
+{
+}
+
+static inline struct dma_chan *acpi_dma_request_slave_chan_by_index(
+ struct device *dev, size_t index)
+{
+ return NULL;
+}
+static inline struct dma_chan *acpi_dma_request_slave_chan_by_name(
+ struct device *dev, const char *name)
+{
+ return NULL;
+}
+
+#define acpi_dma_simple_xlate NULL
+
+#endif
+
+#define acpi_dma_request_slave_channel acpi_dma_request_slave_chan_by_index
+
+#endif /* __LINUX_ACPI_DMA_H */
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 91ac8da25020..96d3e4ab11a9 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -967,8 +967,9 @@ enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie);
#ifdef CONFIG_DMA_ENGINE
enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
void dma_issue_pending_all(void);
-struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param);
-struct dma_chan *dma_request_slave_channel(struct device *dev, char *name);
+struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
+ dma_filter_fn fn, void *fn_param);
+struct dma_chan *dma_request_slave_channel(struct device *dev, const char *name);
void dma_release_channel(struct dma_chan *chan);
#else
static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx)
@@ -978,13 +979,13 @@ static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descript
static inline void dma_issue_pending_all(void)
{
}
-static inline struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask,
+static inline struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
dma_filter_fn fn, void *fn_param)
{
return NULL;
}
static inline struct dma_chan *dma_request_slave_channel(struct device *dev,
- char *name)
+ const char *name)
{
return NULL;
}
@@ -1005,9 +1006,9 @@ struct dma_chan *net_dma_find_channel(void);
__dma_request_slave_channel_compat(&(mask), x, y, dev, name)
static inline struct dma_chan
-*__dma_request_slave_channel_compat(dma_cap_mask_t *mask, dma_filter_fn fn,
- void *fn_param, struct device *dev,
- char *name)
+*__dma_request_slave_channel_compat(const dma_cap_mask_t *mask,
+ dma_filter_fn fn, void *fn_param,
+ struct device *dev, char *name)
{
struct dma_chan *chan;
diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
index d15073e080dd..364dda734877 100644
--- a/include/linux/of_dma.h
+++ b/include/linux/of_dma.h
@@ -25,7 +25,6 @@ struct of_dma {
struct dma_chan *(*of_dma_xlate)
(struct of_phandle_args *, struct of_dma *);
void *of_dma_data;
- int use_count;
};
struct of_dma_filter_info {
@@ -38,9 +37,9 @@ extern int of_dma_controller_register(struct device_node *np,
struct dma_chan *(*of_dma_xlate)
(struct of_phandle_args *, struct of_dma *),
void *data);
-extern int of_dma_controller_free(struct device_node *np);
+extern void of_dma_controller_free(struct device_node *np);
extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
- char *name);
+ const char *name);
extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
struct of_dma *ofdma);
#else
@@ -52,13 +51,12 @@ static inline int of_dma_controller_register(struct device_node *np,
return -ENODEV;
}
-static inline int of_dma_controller_free(struct device_node *np)
+static inline void of_dma_controller_free(struct device_node *np)
{
- return -ENODEV;
}
static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
- char *name)
+ const char *name)
{
return NULL;
}
diff --git a/include/linux/sudmac.h b/include/linux/sudmac.h
new file mode 100644
index 000000000000..377b8a5788fa
--- /dev/null
+++ b/include/linux/sudmac.h
@@ -0,0 +1,52 @@
+/*
+ * Header for the SUDMAC driver
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+#ifndef SUDMAC_H
+#define SUDMAC_H
+
+#include <linux/dmaengine.h>
+#include <linux/shdma-base.h>
+#include <linux/types.h>
+
+/* Used by slave DMA clients to request DMA to/from a specific peripheral */
+struct sudmac_slave {
+ struct shdma_slave shdma_slave; /* Set by the platform */
+};
+
+/*
+ * Supplied by platforms to specify, how a DMA channel has to be configured for
+ * a certain peripheral
+ */
+struct sudmac_slave_config {
+ int slave_id;
+};
+
+struct sudmac_channel {
+ unsigned long offset;
+ unsigned long config;
+ unsigned long wait; /* The configuable range is 0 to 3 */
+ unsigned long dint_end_bit;
+};
+
+struct sudmac_pdata {
+ const struct sudmac_slave_config *slave;
+ int slave_num;
+ const struct sudmac_channel *channel;
+ int channel_num;
+};
+
+/* Definitions for the sudmac_channel.config */
+#define SUDMAC_TX_BUFFER_MODE BIT(0)
+#define SUDMAC_RX_END_MODE BIT(1)
+
+/* Definitions for the sudmac_channel.dint_end_bit */
+#define SUDMAC_DMA_BIT_CH0 BIT(0)
+#define SUDMAC_DMA_BIT_CH1 BIT(1)
+
+#endif