[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>
This commit is contained in:
Stephen Hemminger
Jeff Garzik
parent
6f059c3e90
commit
290d4de5b7
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@ -61,10 +61,6 @@
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* a receive requires one (or two if using 64 bit dma).
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*/
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#define is_ec_a1(hw) \
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unlikely((hw)->chip_id == CHIP_ID_YUKON_EC && \
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(hw)->chip_rev == CHIP_REV_YU_EC_A1)
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#define RX_LE_SIZE 512
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#define RX_LE_BYTES (RX_LE_SIZE*sizeof(struct sky2_rx_le))
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#define RX_MAX_PENDING (RX_LE_SIZE/2 - 2)
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@ -725,37 +721,11 @@ static inline struct sky2_tx_le *get_tx_le(struct sky2_port *sky2)
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return le;
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}
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/*
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* This is a workaround code taken from SysKonnect sk98lin driver
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* to deal with chip bug on Yukon EC rev 0 in the wraparound case.
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*/
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static void sky2_put_idx(struct sky2_hw *hw, unsigned q,
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u16 idx, u16 *last, u16 size)
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/* Update chip's next pointer */
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static inline void sky2_put_idx(struct sky2_hw *hw, unsigned q, u16 idx)
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{
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wmb();
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if (is_ec_a1(hw) && idx < *last) {
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u16 hwget = sky2_read16(hw, Y2_QADDR(q, PREF_UNIT_GET_IDX));
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if (hwget == 0) {
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/* Start prefetching again */
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sky2_write8(hw, Y2_QADDR(q, PREF_UNIT_FIFO_WM), 0xe0);
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goto setnew;
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}
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if (hwget == size - 1) {
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/* set watermark to one list element */
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sky2_write8(hw, Y2_QADDR(q, PREF_UNIT_FIFO_WM), 8);
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/* set put index to first list element */
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sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX), 0);
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} else /* have hardware go to end of list */
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sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX),
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size - 1);
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} else {
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setnew:
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sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX), idx);
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}
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*last = idx;
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sky2_write16(hw, Y2_QADDR(q, PREF_UNIT_PUT_IDX), idx);
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mmiowb();
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}
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@ -1001,7 +971,6 @@ static int sky2_rx_start(struct sky2_port *sky2)
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/* Tell chip about available buffers */
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sky2_write16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX), sky2->rx_put);
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sky2->rx_last_put = sky2_read16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX));
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return 0;
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nomem:
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sky2_rx_clean(sky2);
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@ -1299,8 +1268,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
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netif_stop_queue(dev);
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}
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sky2_put_idx(hw, txqaddr[sky2->port], sky2->tx_prod,
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&sky2->tx_last_put, TX_RING_SIZE);
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sky2_put_idx(hw, txqaddr[sky2->port], sky2->tx_prod);
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out_unlock:
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spin_unlock(&sky2->tx_lock);
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@ -1843,8 +1811,7 @@ resubmit:
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sky2_rx_add(sky2, re->mapaddr);
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/* Tell receiver about new buffers. */
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sky2_put_idx(sky2->hw, rxqaddr[sky2->port], sky2->rx_put,
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&sky2->rx_last_put, RX_LE_SIZE);
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sky2_put_idx(sky2->hw, rxqaddr[sky2->port], sky2->rx_put);
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return skb;
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@ -2238,6 +2205,23 @@ static int sky2_reset(struct sky2_hw *hw)
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return -EOPNOTSUPP;
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}
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hw->chip_rev = (sky2_read8(hw, B2_MAC_CFG) & CFG_CHIP_R_MSK) >> 4;
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/* This rev is really old, and requires untested workarounds */
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if (hw->chip_id == CHIP_ID_YUKON_EC && hw->chip_rev == CHIP_REV_YU_EC_A1) {
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printk(KERN_ERR PFX "%s: unsupported revision Yukon-%s (0x%x) rev %d\n",
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pci_name(hw->pdev), yukon2_name[hw->chip_id - CHIP_ID_YUKON_XL],
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hw->chip_id, hw->chip_rev);
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return -EOPNOTSUPP;
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}
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/* This chip is new and not tested yet */
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if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
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pr_info(PFX "%s: is a version of Yukon 2 chipset that has not been tested yet.\n",
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pci_name(hw->pdev));
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pr_info("Please report success/failure to maintainer <shemminger@osdl.org>\n");
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}
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/* disable ASF */
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if (hw->chip_id <= CHIP_ID_YUKON_EC) {
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sky2_write8(hw, B28_Y2_ASF_STAT_CMD, Y2_ASF_RESET);
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@ -2271,7 +2255,6 @@ static int sky2_reset(struct sky2_hw *hw)
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if (!(sky2_read8(hw, B2_Y2_CLK_GATE) & Y2_STATUS_LNK2_INAC))
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++hw->ports;
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}
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hw->chip_rev = (sky2_read8(hw, B2_MAC_CFG) & CFG_CHIP_R_MSK) >> 4;
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sky2_set_power_state(hw, PCI_D0);
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@ -2338,29 +2321,17 @@ static int sky2_reset(struct sky2_hw *hw)
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sky2_write16(hw, STAT_LAST_IDX, STATUS_RING_SIZE - 1);
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/* These status setup values are copied from SysKonnect's driver */
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if (is_ec_a1(hw)) {
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/* WA for dev. #4.3 */
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sky2_write16(hw, STAT_TX_IDX_TH, 0xfff); /* Tx Threshold */
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sky2_write16(hw, STAT_TX_IDX_TH, 10);
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sky2_write8(hw, STAT_FIFO_WM, 16);
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/* set Status-FIFO watermark */
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sky2_write8(hw, STAT_FIFO_WM, 0x21); /* WA for dev. #4.18 */
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/* set Status-FIFO ISR watermark */
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if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev == 0)
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sky2_write8(hw, STAT_FIFO_ISR_WM, 4);
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else
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sky2_write8(hw, STAT_FIFO_ISR_WM, 16);
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/* set Status-FIFO ISR watermark */
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sky2_write8(hw, STAT_FIFO_ISR_WM, 0x07); /* WA for dev. #4.18 */
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sky2_write32(hw, STAT_TX_TIMER_INI, sky2_us2clk(hw, 10000));
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} else {
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sky2_write16(hw, STAT_TX_IDX_TH, 10);
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sky2_write8(hw, STAT_FIFO_WM, 16);
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/* set Status-FIFO ISR watermark */
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if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev == 0)
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sky2_write8(hw, STAT_FIFO_ISR_WM, 4);
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else
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sky2_write8(hw, STAT_FIFO_ISR_WM, 16);
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sky2_write32(hw, STAT_TX_TIMER_INI, sky2_us2clk(hw, 1000));
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sky2_write32(hw, STAT_ISR_TIMER_INI, sky2_us2clk(hw, 7));
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}
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sky2_write32(hw, STAT_TX_TIMER_INI, sky2_us2clk(hw, 1000));
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sky2_write32(hw, STAT_ISR_TIMER_INI, sky2_us2clk(hw, 7));
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/* enable status unit */
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sky2_write32(hw, STAT_CTRL, SC_STAT_OP_ON);
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@ -3091,7 +3062,7 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
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INIT_WORK(&sky2->phy_task, sky2_phy_task, sky2);
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init_MUTEX(&sky2->phy_sema);
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sky2->tx_pending = TX_DEF_PENDING;
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sky2->rx_pending = is_ec_a1(hw) ? 8 : RX_DEF_PENDING;
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sky2->rx_pending = RX_DEF_PENDING;
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sky2->rx_bufsize = sky2_buf_size(ETH_DATA_LEN);
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hw->dev[port] = dev;
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@ -1840,7 +1840,6 @@ struct sky2_port {
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u16 tx_prod; /* next le to use */
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u32 tx_addr64;
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u16 tx_pending;
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u16 tx_last_put;
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u16 tx_last_mss;
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struct ring_info *rx_ring ____cacheline_aligned_in_smp;
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@ -1849,7 +1848,6 @@ struct sky2_port {
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u16 rx_next; /* next re to check */
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u16 rx_put; /* next le index to use */
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u16 rx_pending;
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u16 rx_last_put;
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u16 rx_bufsize;
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#ifdef SKY2_VLAN_TAG_USED
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u16 rx_tag;
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