common/sfc_efx/base: separate target EvQ and IRQ config

[dpdk.git] / drivers / raw / octeontx2_ep / otx2_ep_vf.c

diff --git a/drivers/raw/octeontx2_ep/otx2_ep_vf.c b/drivers/raw/octeontx2_ep/otx2_ep_vf.c
index 24d0ead..bf2a19e 100644 (file)
--- a/drivers/raw/octeontx2_ep/otx2_ep_vf.c
+++ b/drivers/raw/octeontx2_ep/otx2_ep_vf.c
@@ -409,6 +409,28 @@ sdp_vf_disable_io_queues(struct sdp_device *sdpvf)
                sdp_vf_disable_oq(sdpvf, q_no);
 }
 
+static uint32_t
+sdp_vf_update_read_index(struct sdp_instr_queue *iq)
+{
+       uint32_t new_idx = rte_read32(iq->inst_cnt_reg);
+
+       /* The new instr cnt reg is a 32-bit counter that can roll over.
+        * We have noted the counter's initial value at init time into
+        * reset_instr_cnt
+        */
+       if (iq->reset_instr_cnt < new_idx)
+               new_idx -= iq->reset_instr_cnt;
+       else
+               new_idx += (0xffffffff - iq->reset_instr_cnt) + 1;
+
+       /* Modulo of the new index with the IQ size will give us
+        * the new index.
+        */
+       new_idx %= iq->nb_desc;
+
+       return new_idx;
+}
+
 int
 sdp_vf_setup_device(struct sdp_device *sdpvf)
 {
@@ -436,6 +458,8 @@ sdp_vf_setup_device(struct sdp_device *sdpvf)
        sdpvf->fn_list.setup_oq_regs       = sdp_vf_setup_oq_regs;
 
        sdpvf->fn_list.setup_device_regs   = sdp_vf_setup_device_regs;
+       sdpvf->fn_list.update_iq_read_idx  = sdp_vf_update_read_index;
+
        sdpvf->fn_list.enable_io_queues    = sdp_vf_enable_io_queues;
        sdpvf->fn_list.disable_io_queues   = sdp_vf_disable_io_queues;