common/octeontx2: add polling based response mbox message

[dpdk.git] / drivers / common / octeontx2 / otx2_mbox.c

diff --git a/drivers/common/octeontx2/otx2_mbox.c b/drivers/common/octeontx2/otx2_mbox.c
index cc341aa..2b78109 100644 (file)
--- a/drivers/common/octeontx2/otx2_mbox.c
+++ b/drivers/common/octeontx2/otx2_mbox.c
@@ -11,6 +11,7 @@
 #include <rte_cycles.h>
 
 #include "otx2_mbox.h"
+#include "otx2_dev.h"
 
 #define RVU_AF_AFPF_MBOX0      (0x02000)
 #define RVU_AF_AFPF_MBOX1      (0x02008)
@@ -59,12 +60,13 @@ otx2_mbox_reset(struct otx2_mbox *mbox, int devid)
 }
 
 int
-otx2_mbox_init(struct otx2_mbox *mbox, uintptr_t hwbase,
-              uintptr_t reg_base, int direction, int ndevs)
+otx2_mbox_init(struct otx2_mbox *mbox, uintptr_t hwbase, uintptr_t reg_base,
+              int direction, int ndevs, uint64_t intr_offset)
 {
        struct otx2_mbox_dev *mdev;
        int devid;
 
+       mbox->intr_offset = intr_offset;
        mbox->reg_base = reg_base;
        mbox->hwbase = hwbase;
 
@@ -244,6 +246,39 @@ otx2_mbox_get_rsp(struct otx2_mbox *mbox, int devid, void **msg)
        return msghdr->rc;
 }
 
+/**
+ * Polling for given wait time to get mailbox response
+ */
+static int
+mbox_poll(struct otx2_mbox *mbox, uint32_t wait)
+{
+       uint32_t timeout = 0, sleep = 1;
+       uint32_t wait_us = wait * 1000;
+       uint64_t rsp_reg = 0;
+       uintptr_t reg_addr;
+
+       reg_addr = mbox->reg_base + mbox->intr_offset;
+       do {
+               rsp_reg = otx2_read64(reg_addr);
+
+               if (timeout >= wait_us)
+                       return -ETIMEDOUT;
+
+               rte_delay_us(sleep);
+               timeout += sleep;
+       } while (!rsp_reg);
+
+       rte_smp_rmb();
+
+       /* Clear interrupt */
+       otx2_write64(rsp_reg, reg_addr);
+
+       /* Reset mbox */
+       otx2_mbox_reset(mbox, 0);
+
+       return 0;
+}
+
 /**
  * @internal
  * Wait and get mailbox response with timeout
@@ -322,11 +357,15 @@ otx2_mbox_wait_for_rsp_tmo(struct otx2_mbox *mbox, int devid, uint32_t tmo)
        }
 
        /* Wait message */
-       rc = mbox_wait(mbox, devid, tmo);
-       if (rc)
-               return rc;
+       if (rte_thread_is_intr())
+               rc = mbox_poll(mbox, tmo);
+       else
+               rc = mbox_wait(mbox, devid, tmo);
+
+       if (!rc)
+               rc = mdev->num_msgs;
 
-       return mdev->msgs_acked;
+       return rc;
 }
 
 /**