[PATCH] s2io: performance improvements
hi,
This patch contains all the changes that were done to improve
performance of s2io driver. one line description of the changes
are
1. For Non NAPI case the rx interrupt handler is being called
unconditionally
2. code optimization and adding prefetch skb->data
3. Remove modulo operations in fast path
4. Enable Group Reads and set backoff interval to 0x1000
5. correct PIC_CNTL_SHARED_SPLITS macro definition, and reduce
pause parameter
6. Corrected logic of identifying rx buffer level in rx_buffer_level()
7. fix DMA map and unmap done with different sizes in 1-buf mode
8. Removed forcible disabling of ERO
9. Send up the packets with transfer code = 0x5
Signed-off-by: Ananda Raju <ananda.raju@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/s2io-regs.h b/drivers/net/s2io-regs.h
index 00179bc..542ae15 100644
--- a/drivers/net/s2io-regs.h
+++ b/drivers/net/s2io-regs.h
@@ -187,7 +187,7 @@
/* PIC Control registers */
u64 pic_control;
#define PIC_CNTL_RX_ALARM_MAP_1 BIT(0)
-#define PIC_CNTL_SHARED_SPLITS(n) vBIT(n,11,4)
+#define PIC_CNTL_SHARED_SPLITS(n) vBIT(n,11,5)
u64 swapper_ctrl;
#define SWAPPER_CTRL_PIF_R_FE BIT(0)
@@ -284,9 +284,13 @@
u64 gpio_control;
#define GPIO_CTRL_GPIO_0 BIT(8)
u64 misc_control;
+#define EXT_REQ_EN BIT(1)
#define MISC_LINK_STABILITY_PRD(val) vBIT(val,29,3)
- u8 unused7_1[0x240 - 0x208];
+ u8 unused7_1[0x230 - 0x208];
+
+ u64 pic_control2;
+ u64 ini_dperr_ctrl;
u64 wreq_split_mask;
#define WREQ_SPLIT_MASK_SET_MASK(val) vBIT(val, 52, 12)
@@ -493,6 +497,7 @@
#define PRC_CTRL_NO_SNOOP_DESC BIT(22)
#define PRC_CTRL_NO_SNOOP_BUFF BIT(23)
#define PRC_CTRL_BIMODAL_INTERRUPT BIT(37)
+#define PRC_CTRL_GROUP_READS BIT(38)
#define PRC_CTRL_RXD_BACKOFF_INTERVAL(val) vBIT(val,40,24)
u64 prc_alarm_action;