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If device_node np doesn't contain child or first child doesn't have
property "reg" then hidma_mgmt_of_populate_channels() perfoms
deallocation on uninitialized local variable res.
The patch adds res initialization by NULL.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Reviewed-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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A regression was found while testing QOS with different channels.
The QOS register offset is 0x700 rather than 0x300.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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A false overriding information is being presented during boot
under this scenario.
1. First object checks for kernel command line value against zero.
2. It doesn't find it, it sets the command line variable to the
value coming from ACPI/DT.
3. Second object is being probed.
4. Second object sees that the value of kernel command line
override is non-zero, it prints an overriding message even though
value matches ACPI/DT value.
hidma-mgmt QCOM8060:03: overriding max-write-burst-bytes: 1024
Add an additional check to verify that kernel command line value
is different from the ACPI/DT value.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Parameters like maximum read/write request size and the maximum
number of active transactions are currently configured in DT/ACPI.
This patch allows a user to override these to fine tune performance
for their application.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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MODULE_DEVICE_TABLE is used by the kernel to determine which device driver
should be loaded for which platform device. MODULE_DEVICE_TABLE has been
only defined for the device-tree based platforms in the current code.
Defining it also for ACPI based platforms.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Device node iterators put the previous value of the index variable, so an
explicit put causes a double put.
Generated by: scripts/coccinelle/iterators/device_node_continue.cocci
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Configure the DMA bindings for the device tree based firmware.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Use for_each_matching_node() macro instead of open coding it.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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hidma_mgmt_of_populate_channels()
In case of error, the function platform_device_register_full()
returns ERR_PTR() and never returns NULL. The NULL test in the
return value check should be replaced with IS_ERR().
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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In order to create a relationship model between the channels and the
management object, we are adding support for object hierarchy to the
drivers. This patch simplifies the userspace application development.
We will not have to traverse different firmware paths based on device
tree or ACPI based kernels.
No matter what flavor of kernel is used, objects will be represented as
platform devices.
The new layout is as follows:
hidmam_10: hidma-mgmt@0x5A000000 {
compatible = "qcom,hidma-mgmt-1.0";
...
hidma_10: hidma@0x5a010000 {
compatible = "qcom,hidma-1.0";
...
}
}
The hidma_mgmt_init detects each instance of the hidma-mgmt-1.0 objects
in device tree and calls into the channel driver to create platform devices
for each child of the management object.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The Qualcomm Technologies HIDMA device has been designed to support
virtualization technology. The driver has been divided into two to follow
the hardware design.
1. HIDMA Management driver
2. HIDMA Channel driver
Each HIDMA HW consists of multiple channels. These channels share some set
of common parameters. These parameters are initialized by the management
driver during power up. Same management driver is used for monitoring the
execution of the channels. Management driver can change the performance
behavior dynamically such as bandwidth allocation and prioritization.
The management driver is executed in host context and is the main
management entity for all channels provided by the device.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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