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misc: fastrpc: Add mmap request assigning for static PD pool

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If the mmap request is to add pages and thre are VMIDs associated with
that context, do a call to SCM to reassign that memory. Do not do this
for remote heap allocation, that is done on init create static process
only.

Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221125071405.148786-10-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Abel Vesa 2022-11-25 07:14:04 +00:00 committed by Greg Kroah-Hartman
parent 76e8e4ace1
commit 532ad70c6d
1 changed files with 18 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

19
drivers/misc/fastrpc.c
View file

@ -1839,8 +1839,9 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
if (copy_from_user(&req, argp, sizeof(req)))
return -EFAULT;
if (req.flags != ADSP_MMAP_ADD_PAGES) {
if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) {
dev_err(dev, "flag not supported 0x%x\n", req.flags);
return -EINVAL;
}
@ -1886,6 +1887,22 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
/* let the client know the address to use */
req.vaddrout = rsp_msg.vaddr;
/* Add memory to static PD pool, protection thru hypervisor */
if (req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) {
struct qcom_scm_vmperm perm;
int err = 0;
perm.vmid = QCOM_SCM_VMID_HLOS;
perm.perm = QCOM_SCM_PERM_RWX;
err = qcom_scm_assign_mem(buf->phys, buf->size,
&(fl->cctx->vmperms[0].vmid), &perm, 1);
if (err) {
dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
buf->phys, buf->size, err);
goto err_assign;
}
}
spin_lock(&fl->lock);
list_add_tail(&buf->node, &fl->mmaps);
spin_unlock(&fl->lock);