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| author | Subramaniam C.A <subramaniam.ca@ti.com> | 2012-02-09 17:40:13 -0600 |
|---|---|---|
| committer | Ziyann <jaraidaniel@gmail.com> | 2014-10-01 12:56:55 +0200 |
| commit | 595d8026b9c22605877eeec8a7e6fbf3d43292ab (patch) | |
| tree | 3bdd8596f28dad7ae44a4c06a14a869843fc53fe /drivers/remoteproc | |
| parent | 37e92a5897889e40cf496b33c1b4b3951b3720cd (diff) | |
| download | kernel_samsung_tuna-595d8026b9c22605877eeec8a7e6fbf3d43292ab.tar.gz kernel_samsung_tuna-595d8026b9c22605877eeec8a7e6fbf3d43292ab.tar.bz2 kernel_samsung_tuna-595d8026b9c22605877eeec8a7e6fbf3d43292ab.zip | |
remoteproc: add an api to do pa to da conversion
Added an api to provide memory translation from a
physical address to a device virtual address.
Change-Id: I476ce1ba8dc53562c500ad069be42b62e69c5ee3
Signed-off-by: Subramaniam C.A <subramaniam.ca@ti.com>
Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/remoteproc.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc.c b/drivers/remoteproc/remoteproc.c index 12dd4ddc4e0..2f71c80fa26 100644 --- a/drivers/remoteproc/remoteproc.c +++ b/drivers/remoteproc/remoteproc.c @@ -1201,6 +1201,34 @@ static int rproc_loader(struct rproc *rproc) return 0; } +int rproc_pa_to_da(struct rproc *rproc, phys_addr_t pa, u64 *da) +{ + int i, ret = -EINVAL; + struct rproc_mem_entry *maps = NULL; + + if (!rproc || !da) + return -EINVAL; + + if (mutex_lock_interruptible(&rproc->lock)) + return -EINTR; + + if (rproc->state == RPROC_RUNNING || rproc->state == RPROC_SUSPENDED) { + maps = rproc->memory_maps; + for (i = 0; maps->size; maps++) { + if (pa >= maps->pa && pa < (maps->pa + maps->size)) { + *da = maps->da + (pa - maps->pa); + ret = 0; + break; + } + } + } + + mutex_unlock(&rproc->lock); + return ret; + +} +EXPORT_SYMBOL(rproc_pa_to_da); + int rproc_set_secure(const char *name, bool enable) { struct rproc *rproc; |