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ubwcp: Re-map as uncached and invalidate

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Re-map ULA PA as uncached and invalidate before power
collapse.

Change-Id: Ice676b98a472512c0be1ad83b5b592fec079e7ee
Signed-off-by: Liam Mark <quic_lmark@quicinc.com>
This commit is contained in:
Liam Mark
2022-11-16 11:27:04 -08:00
parent 7a0417fe15
commit bc6e2ce23d
1 changed files with 19 additions and 0 deletions
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19
ubwcp/ubwcp_main.c
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@@ -26,6 +26,7 @@
#include <linux/debugfs.h>
#include <linux/clk.h>
#include <linux/iommu.h>
#include <linux/set_memory.h>
MODULE_IMPORT_NS(DMA_BUF);
@@ -2000,6 +2001,24 @@ static int ubwcp_free_buffer(struct dma_buf *dmabuf)
* care of flush. Just a note for now. Might need to add the
* flush here for debug purpose.
*/
DBG("set_direct_map_range_uncached() for ULA PA pool st:0x%lx num pages:%lu",
ubwcp->ula_pool_base, ubwcp->ula_pool_size >> PAGE_SHIFT);
ret = set_direct_map_range_uncached((unsigned long)phys_to_virt(
ubwcp->ula_pool_base), ubwcp->ula_pool_size >> PAGE_SHIFT);
if (ret) {
ERR("set_direct_map_range_uncached failed st:0x%lx num pages:%lu err: %d",
ubwcp->ula_pool_base,
ubwcp->ula_pool_size >> PAGE_SHIFT, ret);
goto err_remove_mem;
} else {
DBG("DONE: calling set_direct_map_range_uncached() for ULA PA pool");
}
DBG("Calling dma_sync_single_for_cpu() for ULA PA pool");
dma_sync_single_for_cpu(ubwcp->dev, ubwcp->ula_pool_base, ubwcp->ula_pool_size,
DMA_BIDIRECTIONAL);
DBG("Calling offline_and_remove_memory() for ULA PA pool");
ret = offline_and_remove_memory(ubwcp->ula_pool_base,
ubwcp->ula_pool_size);