crypto/ccp: support hwrng

[dpdk.git] / drivers / crypto / ccp / ccp_dev.c

diff --git a/drivers/crypto/ccp/ccp_dev.c b/drivers/crypto/ccp/ccp_dev.c
index 48bebb2..80fe6a4 100644 (file)
--- a/drivers/crypto/ccp/ccp_dev.c
+++ b/drivers/crypto/ccp/ccp_dev.c
@@ -62,6 +62,26 @@ ccp_allot_queue(struct rte_cryptodev *cdev, int slot_req)
        return NULL;
 }
 
+int
+ccp_read_hwrng(uint32_t *value)
+{
+       struct ccp_device *dev;
+
+       TAILQ_FOREACH(dev, &ccp_list, next) {
+               void *vaddr = (void *)(dev->pci.mem_resource[2].addr);
+
+               while (dev->hwrng_retries++ < CCP_MAX_TRNG_RETRIES) {
+                       *value = CCP_READ_REG(vaddr, TRNG_OUT_REG);
+                       if (*value) {
+                               dev->hwrng_retries = 0;
+                               return 0;
+                       }
+               }
+               dev->hwrng_retries = 0;
+       }
+       return -1;
+}
+
 static const struct rte_memzone *
 ccp_queue_dma_zone_reserve(const char *queue_name,
                           uint32_t queue_size,