kernel/linux.git/drivers/soc/qcom/smem.c, branch linux-4.7.y

soc: qcom: smem: Use write-combine remap for SMEM

2016-04-20T02:55:06+00:00

Mapping the SMEM region as write combine makes the contiguous writes in SMD perform better and also allows us to do unaligned read and writes on ARM64. Signed-off-by: Bjorn Andersson Reviewed-by: Andy Gross Signed-off-by: Andy Gross

soc: qcom: smem: Move RPM message ram out of smem DT node

2015-10-14T19:51:40+00:00

SMEM is a software construct built on top of a DDR reserved region and sometimes a device memory region called RPM message ram. Having the RPM message ram in the smem DT node's reg property leads to the smem node being located in different places depending on if the message ram is being used or not. Let's add a qcom specific property, qcom,rpm-msg-ram, and point to the device memory from the SMEM node via a phandle. As SMEM is a software construct, it really needs to reside at the root of the DT regardless of whether it's using the message ram or not. Cc: Bjorn Andersson Signed-off-by: Stephen Boyd Signed-off-by: Andy Gross

soc: qcom: smem: Handle big endian CPUs

2015-10-14T19:51:20+00:00

The contents of smem are always in little endian, but the smem driver is not capable of being used on big endian CPUs. Annotate the little endian data members and update the code to do the proper byte swapping. Cc: Bjorn Andersson Signed-off-by: Stephen Boyd Reviewed-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: Make qcom_smem_get() return a pointer

2015-10-14T19:51:20+00:00

Passing a void ** almost always requires a cast at the call site. Instead of littering the code with casts every time this function is called, have qcom_smem_get() return a void pointer to the location of the smem item. This frees the caller from having to cast the pointer. Cc: Bjorn Andersson Signed-off-by: Stephen Boyd Reviewed-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: smem: Avoid NULL pointer exception on remove

2015-10-14T19:51:20+00:00

Don't set a pointer to NULL and then dereference it in the next line. Cc: Bjorn Andersson Signed-off-by: Stephen Boyd Reviewed-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: smem: Fix errant private access

2015-09-09T20:56:52+00:00

This patch corrects private partition item access. Instead of falling back to global for instances where we have an actual host and remote partition existing, return the results of the private lookup. Signed-off-by: Andy Gross

soc: qcom: Add Shared Memory Manager driver

2015-07-28T20:50:16+00:00

The Shared Memory Manager driver implements an interface for allocating and accessing items in the memory area shared among all of the processors in a Qualcomm platform. Signed-off-by: Bjorn Andersson Acked-by: Andy Gross Signed-off-by: Andy Gross