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2019-04-21Merge 5.1-rc6 into char-misc-nextGreg Kroah-Hartman1-1/+6
We want the fixes, and this resolves a merge error in the fastrpc driver. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-02misc: fastrpc: add checked value for dma_set_maskBo YU1-1/+6
There be should check return value from dma_set_mask to throw some info if fail to set dma mask. Detected by CoverityScan, CID# 1443983: Error handling issues (CHECKED_RETURN) Fixes: f6f9279f2bf0 ("misc: fastrpc: Add Qualcomm fastrpc basic driver model") Signed-off-by: Bo YU <tsu.yubo@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: increase max init file size to 64 MBSrinivas Kandagatla1-1/+1
In some cases where Neural Processing is required the size of init process exceeds default size of 2MB, increase this size to 64MB which is required for QCS404 CDSP Neural Processing. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: fix remote page size calculationSrinivas Kandagatla1-2/+9
Remote page size should be calculated based on address and size, fix this! Without this we will endup with one page less in cases where the buffer is across 3 pages. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Reported-by: Krishnaiah Tadakamalla <ktadakam@qti.qualcomm.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: take into account of overlapping buffersSrinivas Kandagatla1-14/+98
Argument buffers that are passed could be derived from a big buffer, and some of the arguments buffers could overlap each other. Take care of such instanaces. This is optimization that DSP expects while sending buffers which overlap. So make the DSP happy doing it. Without which DSP seems to crash. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: consider address offset before sending to DSPSrinivas Kandagatla1-0/+8
While passing address phy address to DSP, take care of the offset calculated from virtual address vma. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: use correct spinlock variantSrinivas Kandagatla1-19/+29
context spin lock can be interrupted from callback path so use correct spinlock so that we do not hit spinlock recursion. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: make sure memory read and writes are visibleSrinivas Kandagatla1-0/+5
dma_alloc_coherent buffers could have writes queued in store buffers so commit them before sending buffer to DSP using correct dma barriers. Same with vice-versa. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: Fix a possible double freeThierry Escande1-11/+20
This patch fixes the error exit path of fastrpc_init_create_process(). If the DMA allocation or the DSP invoke fails the fastrpc_map was freed but not removed from the mapping list leading to a double free once the mapping list is emptied in fastrpc_device_release(). [srinivas kandagatla]: Cleaned up error path labels and reset init mem to NULL after free Fixes: d73f71c7c6ee("misc: fastrpc: Add support for create remote init process") Signed-off-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28misc: fastrpc: Avoid free of DMA buffer in interrupt contextThierry Escande1-1/+17
When the remote DSP invocation is interrupted by the user, the associated DMA buffer can be freed in interrupt context causing a kernel BUG. This patch adds a worker thread associated to the fastrpc context. It is scheduled in the rpmsg callback to decrease its refcount out of the interrupt context. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-19misc: fastrpc: Fix return value check in fastrpc_map_create()Wei Yongjun1-2/+2
In case of error, the function dma_buf_get() 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 <weiyongjun1@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-19misc: fastrpc: Fix device_open when no session is availableThierry Escande1-1/+10
This change fixes fastrpc_device_open() when no session is available and return an error in such case. Signed-off-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-12misc: fastrpc: Add support for dmabuf exporterSrinivas Kandagatla1-0/+184
User process can involve dealing with big buffer sizes, and also passing buffers from one compute context bank to other compute context bank for complex dsp algorithms. This patch adds support to fastrpc to make it a proper dmabuf exporter to avoid making copies of buffers. Co-developed-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-12misc: fastrpc: Add support for create remote init processSrinivas Kandagatla1-0/+156
This patch adds support to create or attach remote shell process. The shell process called fastrpc_shell_0 is usually loaded on the DSP when a user process is spawned. Most of the work is derived from various downstream Qualcomm kernels. Credits to various Qualcomm authors who have contributed to this code. Specially Tharun Kumar Merugu <mtharu@codeaurora.org> Co-developed-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-12misc: fastrpc: Add support for context Invoke methodSrinivas Kandagatla1-0/+730
This patch adds support to compute context invoke method on the remote processor (DSP). This involves setting up the functions input and output arguments, input and output handles and mapping the dmabuf fd for the argument/handle buffers. The below diagram depicts invocation of a single method where the client and objects reside on different processors. An object could expose multiple methods which can be grouped together and referred to as an interface. ,--------, ,------, ,-----------, ,------, ,--------, | | method | | | | | | method | | | Client |------->| Stub |->| Transport |->| Skel |------->| Object | | | | | | | | | | | `--------` `------` `-----------` `------` `--------` Client: Linux user mode process that initiates the remote invocation Stub: Auto generated code linked in with the user mode process that takes care of marshaling parameters Transport: Involved in carrying an invocation from a client to an object. This involves two portions: 1) FastRPC Linux kernel driver that receives the remote invocation, queues them up and then waits for the response after signaling the remote side. 2) Service running on the remote side that dequeues the messages from the queue and dispatches them for processing. Skel: Auto generated code that takes care of un-marshaling parameters Object: Method implementation Most of the work is derived from various downstream Qualcomm kernels. Credits to various Qualcomm authors who have contributed to this code. Specially Tharun Kumar Merugu <mtharu@codeaurora.org> Co-developed-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-12misc: fastrpc: Add Qualcomm fastrpc basic driver modelSrinivas Kandagatla1-0/+322
This patch adds basic driver model for Qualcomm FastRPC driver which implements an IPC (Inter-Processor Communication) mechanism that allows for clients to transparently make remote method invocations across processor boundaries. Each DSP rpmsg channel is represented as fastrpc channel context and is exposed as a character device for userspace interface. Each compute context bank is represented as fastrpc-session-context, which are dynamically managed by the channel context char device. Co-developed-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Thierry Escande <thierry.escande@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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