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Date: Fri, 23 Oct 2009 19:30:06 +0100
From: Ben Hutchings <bhutchings@...arflare.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: [PATCH 06/27] sfc: Remove versioned bitfield macros
These macros are not extensible to more than two NIC types without
repetition of register definitions, and they are only used to deal
with a few fields in RX_CFG_REG and global events which moved between
Falcon rev A1 and B0.
Therefore:
- Move RX_CFG_REG initialisation into its own function which tests the
NIC revision just once
- Explicitly test the NIC revision when checking the RX_RECOVERY flag in
global events
- Merge definitions of RX_XOFF_MAC_EN flag, which did not move
- Remove the macro definitions
Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
drivers/net/sfc/bitfield.h | 13 -------
drivers/net/sfc/falcon.c | 67 +++++++++++++++++++++++++-------------
drivers/net/sfc/falcon_hwdefs.h | 7 ++--
3 files changed, 47 insertions(+), 40 deletions(-)
diff --git a/drivers/net/sfc/bitfield.h b/drivers/net/sfc/bitfield.h
index d54d84c..6ad909b 100644
--- a/drivers/net/sfc/bitfield.h
+++ b/drivers/net/sfc/bitfield.h
@@ -520,19 +520,6 @@ typedef union efx_oword {
#define EFX_SET_QWORD_FIELD EFX_SET_QWORD_FIELD32
#endif
-#define EFX_SET_OWORD_FIELD_VER(efx, oword, field, value) do { \
- if (falcon_rev(efx) >= FALCON_REV_B0) { \
- EFX_SET_OWORD_FIELD((oword), field##_B0, (value)); \
- } else { \
- EFX_SET_OWORD_FIELD((oword), field##_A1, (value)); \
- } \
-} while (0)
-
-#define EFX_QWORD_FIELD_VER(efx, qword, field) \
- (falcon_rev(efx) >= FALCON_REV_B0 ? \
- EFX_QWORD_FIELD((qword), field##_B0) : \
- EFX_QWORD_FIELD((qword), field##_A1))
-
/* Used to avoid compiler warnings about shift range exceeding width
* of the data types when dma_addr_t is only 32 bits wide.
*/
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index eed8d1f..4cb98d4 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -929,7 +929,9 @@ static void falcon_handle_global_event(struct efx_channel *channel,
handled = true;
}
- if (EFX_QWORD_FIELD_VER(efx, *event, RX_RECOVERY)) {
+ if (falcon_rev(efx) <= FALCON_REV_A1 ?
+ EFX_QWORD_FIELD(*event, RX_RECOVERY_A1) :
+ EFX_QWORD_FIELD(*event, RX_RECOVERY_B0)) {
EFX_ERR(efx, "channel %d seen global RX_RESET "
"event. Resetting.\n", channel->channel);
@@ -2006,7 +2008,7 @@ void falcon_reconfigure_mac_wrapper(struct efx_nic *efx)
* Action on receipt of pause frames is controller by XM_DIS_FCNTL */
tx_fc = !!(efx->link_fc & EFX_FC_TX);
falcon_read(efx, ®, RX_CFG_REG_KER);
- EFX_SET_OWORD_FIELD_VER(efx, reg, RX_XOFF_MAC_EN, tx_fc);
+ EFX_SET_OWORD_FIELD(reg, RX_XOFF_MAC_EN, tx_fc);
/* Unisolate the MAC -> RX */
if (falcon_rev(efx) >= FALCON_REV_B0)
@@ -2910,6 +2912,45 @@ int falcon_probe_nic(struct efx_nic *efx)
return rc;
}
+static void falcon_init_rx_cfg(struct efx_nic *efx)
+{
+ /* Prior to Siena the RX DMA engine will split each frame at
+ * intervals of RX_USR_BUF_SIZE (32-byte units). We set it to
+ * be so large that that never happens. */
+ const unsigned huge_buf_size = (3 * 4096) >> 5;
+ /* RX control FIFO thresholds (32 entries) */
+ const unsigned ctrl_xon_thr = 20;
+ const unsigned ctrl_xoff_thr = 25;
+ /* RX data FIFO thresholds (256-byte units; size varies) */
+ unsigned data_xon_thr =
+ ((rx_xon_thresh_bytes >= 0) ?
+ rx_xon_thresh_bytes : efx->type->rx_xon_thresh) >> 8;
+ unsigned data_xoff_thr =
+ ((rx_xoff_thresh_bytes >= 0) ?
+ rx_xoff_thresh_bytes : efx->type->rx_xoff_thresh) >> 8;
+ efx_oword_t reg;
+
+ falcon_read(efx, ®, RX_CFG_REG_KER);
+ if (falcon_rev(efx) <= FALCON_REV_A1) {
+ EFX_SET_OWORD_FIELD(reg, RX_DESC_PUSH_EN_A1, 0);
+ EFX_SET_OWORD_FIELD(reg, RX_USR_BUF_SIZE_A1, huge_buf_size);
+ EFX_SET_OWORD_FIELD(reg, RX_XON_MAC_TH_A1, data_xon_thr);
+ EFX_SET_OWORD_FIELD(reg, RX_XOFF_MAC_TH_A1, data_xoff_thr);
+ EFX_SET_OWORD_FIELD(reg, RX_XON_TX_TH_A1, ctrl_xon_thr);
+ EFX_SET_OWORD_FIELD(reg, RX_XOFF_TX_TH_A1, ctrl_xoff_thr);
+ } else {
+ /* Register fields moved */
+ EFX_SET_OWORD_FIELD(reg, RX_DESC_PUSH_EN_B0, 0);
+ EFX_SET_OWORD_FIELD(reg, RX_USR_BUF_SIZE_B0, huge_buf_size);
+ EFX_SET_OWORD_FIELD(reg, RX_XON_MAC_TH_B0, data_xon_thr);
+ EFX_SET_OWORD_FIELD(reg, RX_XOFF_MAC_TH_B0, data_xoff_thr);
+ EFX_SET_OWORD_FIELD(reg, RX_XON_TX_TH_B0, ctrl_xon_thr);
+ EFX_SET_OWORD_FIELD(reg, RX_XOFF_TX_TH_B0, ctrl_xoff_thr);
+ EFX_SET_OWORD_FIELD(reg, RX_INGR_EN_B0, 1);
+ }
+ falcon_write(efx, ®, RX_CFG_REG_KER);
+}
+
/* This call performs hardware-specific global initialisation, such as
* defining the descriptor cache sizes and number of RSS channels.
* It does not set up any buffers, descriptor rings or event queues.
@@ -2917,7 +2958,6 @@ int falcon_probe_nic(struct efx_nic *efx)
int falcon_init_nic(struct efx_nic *efx)
{
efx_oword_t temp;
- unsigned thresh;
int rc;
/* Use on-chip SRAM */
@@ -3024,26 +3064,7 @@ int falcon_init_nic(struct efx_nic *efx)
EFX_SET_OWORD_FIELD(temp, TX_NO_EOP_DISC_EN, 0);
falcon_write(efx, &temp, TX_CFG_REG_KER);
- /* RX config */
- falcon_read(efx, &temp, RX_CFG_REG_KER);
- EFX_SET_OWORD_FIELD_VER(efx, temp, RX_DESC_PUSH_EN, 0);
- if (EFX_WORKAROUND_7575(efx))
- EFX_SET_OWORD_FIELD_VER(efx, temp, RX_USR_BUF_SIZE,
- (3 * 4096) / 32);
- if (falcon_rev(efx) >= FALCON_REV_B0)
- EFX_SET_OWORD_FIELD(temp, RX_INGR_EN_B0, 1);
-
- /* RX FIFO flow control thresholds */
- thresh = ((rx_xon_thresh_bytes >= 0) ?
- rx_xon_thresh_bytes : efx->type->rx_xon_thresh);
- EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XON_MAC_TH, thresh / 256);
- thresh = ((rx_xoff_thresh_bytes >= 0) ?
- rx_xoff_thresh_bytes : efx->type->rx_xoff_thresh);
- EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XOFF_MAC_TH, thresh / 256);
- /* RX control FIFO thresholds [32 entries] */
- EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XON_TX_TH, 20);
- EFX_SET_OWORD_FIELD_VER(efx, temp, RX_XOFF_TX_TH, 25);
- falcon_write(efx, &temp, RX_CFG_REG_KER);
+ falcon_init_rx_cfg(efx);
/* Set destination of both TX and RX Flush events */
if (falcon_rev(efx) >= FALCON_REV_B0) {
diff --git a/drivers/net/sfc/falcon_hwdefs.h b/drivers/net/sfc/falcon_hwdefs.h
index 2d22611..13f3999 100644
--- a/drivers/net/sfc/falcon_hwdefs.h
+++ b/drivers/net/sfc/falcon_hwdefs.h
@@ -313,8 +313,6 @@
#define RX_XON_MAC_TH_B0_WIDTH 9
#define RX_XOFF_MAC_TH_B0_LBN 1
#define RX_XOFF_MAC_TH_B0_WIDTH 9
-#define RX_XOFF_MAC_EN_B0_LBN 0
-#define RX_XOFF_MAC_EN_B0_WIDTH 1
/* A1 */
#define RX_DESC_PUSH_EN_A1_LBN 35
@@ -329,8 +327,9 @@
#define RX_XON_MAC_TH_A1_WIDTH 5
#define RX_XOFF_MAC_TH_A1_LBN 1
#define RX_XOFF_MAC_TH_A1_WIDTH 5
-#define RX_XOFF_MAC_EN_A1_LBN 0
-#define RX_XOFF_MAC_EN_A1_WIDTH 1
+
+#define RX_XOFF_MAC_EN_LBN 0
+#define RX_XOFF_MAC_EN_WIDTH 1
/* Receive filter control register */
#define RX_FILTER_CTL_REG 0x810
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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