net: cadence_gem: Add macro with max number of descriptor words

Add macro with max number of DMA descriptor words.
No functional change.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20181011021931.4249-5-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c
index d672493..a59a36e 100644 (file)
--- a/hw/net/cadence_gem.c
+++ b/hw/net/cadence_gem.c
@@ -1042,7 +1042,7 @@ static void gem_transmit_updatestats(CadenceGEMState *s, const uint8_t *packet,
  */
 static void gem_transmit(CadenceGEMState *s)
 {
-    uint32_t desc[2];
+    uint32_t desc[DESC_MAX_NUM_WORDS];
     hwaddr packet_desc_addr;
     uint8_t     tx_packet[2048];
     uint8_t     *p;
@@ -1108,7 +1108,7 @@ static void gem_transmit(CadenceGEMState *s)
 
             /* Last descriptor for this packet; hand the whole thing off */
             if (tx_desc_get_last(desc)) {
-                uint32_t desc_first[2];
+                uint32_t desc_first[DESC_MAX_NUM_WORDS];
 
                 /* Modify the 1st descriptor of this packet to be owned by
                  * the processor.

diff --git a/include/hw/net/cadence_gem.h b/include/hw/net/cadence_gem.h
index 633d564..b33ef65 100644 (file)
--- a/include/hw/net/cadence_gem.h
+++ b/include/hw/net/cadence_gem.h
@@ -32,6 +32,9 @@
 
 #define CADENCE_GEM_MAXREG        (0x00000800 / 4) /* Last valid GEM address */
 
+/* Max number of words in a DMA descriptor.  */
+#define DESC_MAX_NUM_WORDS              2
+
 #define MAX_PRIORITY_QUEUES             8
 #define MAX_TYPE1_SCREENERS             16
 #define MAX_TYPE2_SCREENERS             16
@@ -74,7 +77,7 @@ typedef struct CadenceGEMState {
 
     uint8_t can_rx_state; /* Debug only */
 
-    uint32_t rx_desc[MAX_PRIORITY_QUEUES][2];
+    uint32_t rx_desc[MAX_PRIORITY_QUEUES][DESC_MAX_NUM_WORDS];
 
     bool sar_active[4];
 } CadenceGEMState;