bus/fslmc: optimize physical to virtual address search

[dpdk.git] / drivers / bus / fslmc / portal / dpaa2_hw_pvt.h

diff --git a/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h b/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
index c76393d..e081afb 100644 (file)
--- a/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
+++ b/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
@@ -254,15 +254,38 @@ enum qbman_fd_format {
  */
 #define DPAA2_EQ_RESP_ALWAYS           1
 
+/* Various structures representing contiguous memory maps */
+struct dpaa2_memseg {
+       TAILQ_ENTRY(dpaa2_memseg) next;
+       char *vaddr;
+       rte_iova_t iova;
+       size_t len;
+};
+
+TAILQ_HEAD(dpaa2_memseg_list, dpaa2_memseg);
+extern struct dpaa2_memseg_list rte_dpaa2_memsegs;
+
 #ifdef RTE_LIBRTE_DPAA2_USE_PHYS_IOVA
 extern uint8_t dpaa2_virt_mode;
 static void *dpaa2_mem_ptov(phys_addr_t paddr) __attribute__((unused));
 /* todo - this is costly, need to write a fast coversion routine */
 static void *dpaa2_mem_ptov(phys_addr_t paddr)
 {
+       struct dpaa2_memseg *ms;
+
        if (dpaa2_virt_mode)
                return (void *)(size_t)paddr;
 
+       /* Check if the address is already part of the memseg list internally
+        * maintained by the dpaa2 driver.
+        */
+       TAILQ_FOREACH(ms, &rte_dpaa2_memsegs, next) {
+               if (paddr >= ms->iova && paddr <
+                       ms->iova + ms->len)
+                       return RTE_PTR_ADD(ms->vaddr, (uintptr_t)(paddr - ms->iova));
+       }
+
+       /* If not, Fallback to full memseg list searching */
        return rte_mem_iova2virt(paddr);
 }