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authorDavid Daney <ddaney@caviumnetworks.com>2010-01-07 11:05:04 -0800
committerRalf Baechle <ralf@linux-mips.org>2010-02-27 12:53:08 +0100
commit3368c784bcf77124aaf39372e627016c36bd4472 (patch)
treee8c0c3ba5d36f9070ac5ab131f7991fd16a8e532 /drivers/staging/octeon/ethernet-rx.h
parent6888fc87768eaa218b6244f2e78c55416706981a (diff)
Staging: Octeon Ethernet: Convert to NAPI.
Convert the driver to be a reasonably well behaved NAPI citizen. There is one NAPI instance per CPU shared between all input ports. As receive backlog increases, NAPI is scheduled on additional CPUs. Receive buffer refill code factored out so it can also be called from the periodic timer. This is needed to recover from temporary buffer starvation conditions. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org To: gregkh@suse.de Patchwork: http://patchwork.linux-mips.org/patch/839/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/staging/octeon/ethernet-rx.h')
-rw-r--r--drivers/staging/octeon/ethernet-rx.h25
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/staging/octeon/ethernet-rx.h b/drivers/staging/octeon/ethernet-rx.h
index a9b72b87a7a6..a0743b85d54e 100644
--- a/drivers/staging/octeon/ethernet-rx.h
+++ b/drivers/staging/octeon/ethernet-rx.h
@@ -24,10 +24,29 @@
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
*********************************************************************/
+#include "cvmx-fau.h"
-irqreturn_t cvm_oct_do_interrupt(int cpl, void *dev_id);
void cvm_oct_poll_controller(struct net_device *dev);
-void cvm_oct_tasklet_rx(unsigned long unused);
-
void cvm_oct_rx_initialize(void);
void cvm_oct_rx_shutdown(void);
+
+static inline void cvm_oct_rx_refill_pool(int fill_threshold)
+{
+ int number_to_free;
+ int num_freed;
+ /* Refill the packet buffer pool */
+ number_to_free =
+ cvmx_fau_fetch_and_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
+
+ if (number_to_free > fill_threshold) {
+ cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
+ -number_to_free);
+ num_freed = cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL,
+ CVMX_FPA_PACKET_POOL_SIZE,
+ number_to_free);
+ if (num_freed != number_to_free) {
+ cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE,
+ number_to_free - num_freed);
+ }
+ }
+}

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