[PATCH] sky2: remove support for untested Yukon EC/rev 0
The Yukon EC/rev0 (A1) chipset requires a bunch of workarounds. I copied these
from sk98lin. But since they never got tested and add more cruft to the code;
any attempt at using driver as is on this version will probably fail.
It looks like this was a early engineering sample chip revision, if it ever shows
up on a real system. Produce an error message.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 7326036..3086e52 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -61,10 +61,6 @@
* a receive requires one (or two if using 64 bit dma).
*/
-#define is_ec_a1(hw) \
- unlikely((hw)->chip_id == CHIP_ID_YUKON_EC && \
- (hw)->chip_rev == CHIP_REV_YU_EC_A1)
-
#define RX_LE_SIZE 512
#define RX_LE_BYTES (RX_LE_SIZE*sizeof(struct sky2_rx_le))
#define RX_MAX_PENDING (RX_LE_SIZE/2 - 2)
@@ -725,37 +721,11 @@
return le;
}
-/*
- * This is a workaround code taken from SysKonnect sk98lin driver
- * to deal with chip bug on Yukon EC rev 0 in the wraparound case.
- */
-static void sky2_put_idx(struct sky2_hw *hw, unsigned q,
- u16 idx, u16 *last, u16 size)
+/* Update chip's next pointer */
+static inline void sky2_put_idx(struct sky2_hw *hw, unsigned q, u16 idx)
{
wmb();
- if (is_ec_a1(hw) && idx < *last) {
- u16 hwget = sky2_read16(hw, Y2_QADDR(q, PREF_UNIT_GET_IDX));
-
- if (hwget == 0) {
- /* Start prefetching again */
- sky2_write8(hw, Y2_QADDR(q, PREF_UNIT_FIFO_WM), 0xe0);
- goto setnew;
- }
-
- if (hwget == size - 1) {
- /* set watermark to one list element */
- sky2_write8(hw, Y2_QADDR(q, PREF_UNIT_FIFO_WM), 8);
-
- /* set put index to first list element */
- sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX), 0);
- } else /* have hardware go to end of list */
- sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX),
- size - 1);
- } else {
-setnew:
- sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX), idx);
- }
- *last = idx;
+ sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX), idx);
mmiowb();
}
@@ -1001,7 +971,6 @@
/* Tell chip about available buffers */
sky2_write16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX), sky2->rx_put);
- sky2->rx_last_put = sky2_read16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX));
return 0;
nomem:
sky2_rx_clean(sky2);
@@ -1299,8 +1268,7 @@
netif_stop_queue(dev);
}
- sky2_put_idx(hw, txqaddr[sky2->port], sky2->tx_prod,
- &sky2->tx_last_put, TX_RING_SIZE);
+ sky2_put_idx(hw, txqaddr[sky2->port], sky2->tx_prod);
out_unlock:
spin_unlock(&sky2->tx_lock);
@@ -1843,8 +1811,7 @@
sky2_rx_add(sky2, re->mapaddr);
/* Tell receiver about new buffers. */
- sky2_put_idx(sky2->hw, rxqaddr[sky2->port], sky2->rx_put,
- &sky2->rx_last_put, RX_LE_SIZE);
+ sky2_put_idx(sky2->hw, rxqaddr[sky2->port], sky2->rx_put);
return skb;
@@ -2238,6 +2205,23 @@
return -EOPNOTSUPP;
}
+ hw->chip_rev = (sky2_read8(hw, B2_MAC_CFG) & CFG_CHIP_R_MSK) >> 4;
+
+ /* This rev is really old, and requires untested workarounds */
+ if (hw->chip_id == CHIP_ID_YUKON_EC && hw->chip_rev == CHIP_REV_YU_EC_A1) {
+ printk(KERN_ERR PFX "%s: unsupported revision Yukon-%s (0x%x) rev %d\n",
+ pci_name(hw->pdev), yukon2_name[hw->chip_id - CHIP_ID_YUKON_XL],
+ hw->chip_id, hw->chip_rev);
+ return -EOPNOTSUPP;
+ }
+
+ /* This chip is new and not tested yet */
+ if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
+ pr_info(PFX "%s: is a version of Yukon 2 chipset that has not been tested yet.\n",
+ pci_name(hw->pdev));
+ pr_info("Please report success/failure to maintainer <shemminger@osdl.org>\n");
+ }
+
/* disable ASF */
if (hw->chip_id <= CHIP_ID_YUKON_EC) {
sky2_write8(hw, B28_Y2_ASF_STAT_CMD, Y2_ASF_RESET);
@@ -2271,7 +2255,6 @@
if (!(sky2_read8(hw, B2_Y2_CLK_GATE) & Y2_STATUS_LNK2_INAC))
++hw->ports;
}
- hw->chip_rev = (sky2_read8(hw, B2_MAC_CFG) & CFG_CHIP_R_MSK) >> 4;
sky2_set_power_state(hw, PCI_D0);
@@ -2338,29 +2321,17 @@
sky2_write16(hw, STAT_LAST_IDX, STATUS_RING_SIZE - 1);
/* These status setup values are copied from SysKonnect's driver */
- if (is_ec_a1(hw)) {
- /* WA for dev. #4.3 */
- sky2_write16(hw, STAT_TX_IDX_TH, 0xfff); /* Tx Threshold */
+ sky2_write16(hw, STAT_TX_IDX_TH, 10);
+ sky2_write8(hw, STAT_FIFO_WM, 16);
- /* set Status-FIFO watermark */
- sky2_write8(hw, STAT_FIFO_WM, 0x21); /* WA for dev. #4.18 */
+ /* set Status-FIFO ISR watermark */
+ if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev == 0)
+ sky2_write8(hw, STAT_FIFO_ISR_WM, 4);
+ else
+ sky2_write8(hw, STAT_FIFO_ISR_WM, 16);
- /* set Status-FIFO ISR watermark */
- sky2_write8(hw, STAT_FIFO_ISR_WM, 0x07); /* WA for dev. #4.18 */
- sky2_write32(hw, STAT_TX_TIMER_INI, sky2_us2clk(hw, 10000));
- } else {
- sky2_write16(hw, STAT_TX_IDX_TH, 10);
- sky2_write8(hw, STAT_FIFO_WM, 16);
-
- /* set Status-FIFO ISR watermark */
- if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev == 0)
- sky2_write8(hw, STAT_FIFO_ISR_WM, 4);
- else
- sky2_write8(hw, STAT_FIFO_ISR_WM, 16);
-
- sky2_write32(hw, STAT_TX_TIMER_INI, sky2_us2clk(hw, 1000));
- sky2_write32(hw, STAT_ISR_TIMER_INI, sky2_us2clk(hw, 7));
- }
+ sky2_write32(hw, STAT_TX_TIMER_INI, sky2_us2clk(hw, 1000));
+ sky2_write32(hw, STAT_ISR_TIMER_INI, sky2_us2clk(hw, 7));
/* enable status unit */
sky2_write32(hw, STAT_CTRL, SC_STAT_OP_ON);
@@ -3091,7 +3062,7 @@
INIT_WORK(&sky2->phy_task, sky2_phy_task, sky2);
init_MUTEX(&sky2->phy_sema);
sky2->tx_pending = TX_DEF_PENDING;
- sky2->rx_pending = is_ec_a1(hw) ? 8 : RX_DEF_PENDING;
+ sky2->rx_pending = RX_DEF_PENDING;
sky2->rx_bufsize = sky2_buf_size(ETH_DATA_LEN);
hw->dev[port] = dev;