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msm: adsprpc: Adding inrout buffer cache maintenance support

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Adding inrout buffer CMO support with new cache flush logic
involving offsets and overlaps.

Acked-by: Deepika Singh <dsi@qti.qualcomm.com>
Change-Id: I1e5ac1e3c52c80d40b6c3a0c9207e7a73d06bf65
Signed-off-by: Mohammed Nayeem Ur Rahman <mohara@codeaurora.org>
This commit is contained in:
Mohammed Nayeem Ur Rahman 2020-02-18 23:48:15 +05:30
commit 2973e84157
1 changed files with 13 additions and 7 deletions
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20
drivers/char/adsprpc.c
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@ -273,6 +273,7 @@ struct overlap {
uintptr_t mstart;
uintptr_t mend;
uintptr_t offset;
int do_cmo; /*used for cache maintenance of inrout buffers*/
};
struct smq_invoke_ctx {
@ -1318,6 +1319,9 @@ static int context_build_overlap(struct smq_invoke_ctx *ctx)
if (ctx->overps[i]->end > max.end) {
max.end = ctx->overps[i]->end;
} else {
if (max.raix + 1 <= inbufs &&
ctx->overps[i]->raix + 1 > inbufs)
ctx->overps[i]->do_cmo = 1;
ctx->overps[i]->mend = 0;
ctx->overps[i]->mstart = 0;
}
@ -1966,11 +1970,12 @@ static int get_args(uint32_t kernel, struct smq_invoke_ctx *ctx)
if (map && (map->attr & FASTRPC_ATTR_FORCE_NOFLUSH))
continue;
if (rpra && rpra[i].buf.len &&
ctx->overps[oix]->mstart) {
if (rpra && rpra[i].buf.len && (ctx->overps[oix]->mstart ||
ctx->overps[oix]->do_cmo == 1)) {
if (map && map->buf) {
if ((buf_page_size(ctx->overps[oix]->mend -
ctx->overps[oix]->mstart)) == map->size) {
if (((buf_page_size(ctx->overps[oix]->mend -
ctx->overps[oix]->mstart)) == map->size) ||
ctx->overps[oix]->do_cmo) {
dma_buf_begin_cpu_access(map->buf,
DMA_TO_DEVICE);
dma_buf_end_cpu_access(map->buf,
@ -2105,10 +2110,11 @@ static void inv_args(struct smq_invoke_ctx *ctx)
buf_page_start(rpra[over].buf.pv)) {
continue;
}
if (ctx->overps[i]->mstart) {
if (ctx->overps[i]->mstart || ctx->overps[i]->do_cmo == 1) {
if (map && map->buf) {
if ((buf_page_size(ctx->overps[i]->mend -
ctx->overps[i]->mstart)) == map->size) {
if (((buf_page_size(ctx->overps[i]->mend -
ctx->overps[i]->mstart)) == map->size) ||
ctx->overps[i]->do_cmo) {
dma_buf_begin_cpu_access(map->buf,
DMA_TO_DEVICE);
dma_buf_end_cpu_access(map->buf,