DMA between a host os and processor (such as an x86 processor running
linux) and vice versa is used and supported by Intel's HDA DMA
Controller. This provides a method to transfer data, using hardware,
between the host and the local processor running Zephyr. The enums
added here are used to extend the dma_status direction enum
which provides information back to the DMA user and driver the
direction of the DMA transfer for a particular channel. This can
then be used, where needed, to add logic around the direction of the
transfer.
In addition to adding the two directions it adds enums to account for
cases where additional DMA directions that are IP and driver specific
may exist.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
Some drivers explicitely casted data/config from void * to the
corresponding type. However, this is unnecessary and, in many drivers it
has been misused to drop const qualifier (refer to previous commits).
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
This adds the necessary API calls to support the hardware feature of
suspending and resuming active DMA channels. The hardware feature is
supported by at least Synopsys's DesignWare DMA and NXP's eDMA.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
The magic code to identify context content is a 32-bit value
defined in the dma.h. When tested against the dma_context magic element,
both format must be aligned.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
use atomic_clear_bit instead of atomic_test_and_set_bit
which will not return old value, and thus more coverity friendy
Fixing: #35154
Signed-off-by: Hake Huang <hake.huang@oss.nxp.com>
These are all the case that coccinelle cannot find as they are inside
macro declarations.
Fixed via:
git grep -rlz -E "\(struct device \*" |
xargs -0 sed -i 's/(struct device/(const struct device/g'
Fixes#27399
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Now that device_api attribute is unmodified at runtime, as well as all
the other attributes, it is possible to switch all device driver
instance to be constant.
A coccinelle rule is used for this:
@r_const_dev_1
disable optional_qualifier
@
@@
-struct device *
+const struct device *
@r_const_dev_2
disable optional_qualifier
@
@@
-struct device * const
+const struct device *
Fixes#27399
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Until now, each and every driver had to redeclare the type to store such
pointer, now they will be using this typedef.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Normalize callback like other APIs.
This clarifies the callback usage. It will also help to switch all
device instance to constants.
Fixes#26923
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Add 64bit source_address/dest_address fields support.
This is needed in situation where DMA controller is capable
of handling more than 32bit source and destination addresses.
Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
1. expand PERIPHERAL_TO_PERIPHERAL
2. add slot size to 128 as i.MX-rt has 127 slot
3. add link_channel member in dma_conf which is used to
support chain channel
Signed-off-by: Hake Huang <hake.huang@oss.nxp.com>
This change removes the hardcoded subsystem list in gen_kobject_list.py
favor of marking the relevant driver API structs with the _subsystem
sentinel.
Signed-off-by: Corey Wharton <coreyw7@fb.com>
move dma.h to drivers/dma.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
