ibm_newemac: Parameterize EMAC Multicast Match Handling

Various instances of the EMAC core have varying: 1) number of address
match slots, 2) width of the registers for handling address match slots,
3) number of registers for handling address match slots and 4) base
offset for those registers.

As the driver stands today, it assumes that all EMACs have 4 IAHT and
GAHT 32-bit registers, starting at offset 0x30 from the register base,
with only 16-bits of each used for a total of 64 match slots.

The 405EX(r) and 460EX now use the EMAC4SYNC core rather than the EMAC4
core. This core has 8 IAHT and GAHT registers, starting at offset 0x80
from the register base, with ALL 32-bits of each used for a total of
256 match slots.

This adds a new compatible device tree entry "emac4sync" and a new,
related feature flag "EMAC_FTR_EMAC4SYNC" along with a series of macros
and inlines which supply the appropriate parameterized value based on
the presence or absence of the EMAC4SYNC feature.

The code has further been reworked where appropriate to use those macros
and inlines.

In addition, the register size passed to ioremap is now taken from the
device tree:

	c4 for EMAC4SYNC cores
	74 for EMAC4 cores
	70 for EMAC cores

rather than sizeof (emac_regs).

Finally, the device trees have been updated with the appropriate compatible
entries and resource sizes.

This has been tested on an AMCC Haleakala board such that: 1) inbound
ICMP requests to 'haleakala.local' via MDNS from both Mac OS X 10.4.11
and Ubuntu 8.04 systems as well as 2) outbound ICMP requests from
'haleakala.local' to those same systems in the '.local' domain via MDNS
now work.

Signed-off-by: Grant Erickson <gerickson@nuovations.com>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 42 insertions, 19 deletions

diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c
index 5d2108c5ac7c..ed24a1d607dd 100644
--- a/drivers/net/ibm_newemac/core.c
+++ b/drivers/net/ibm_newemac/core.c
@@ -363,25 +363,31 @@ static int emac_reset(struct emac_instance *dev)
 
 static void emac_hash_mc(struct emac_instance *dev)
 {
-        struct emac_regs __iomem *p = dev->emacp;
-        u16 gaht[4] = { 0 };
+        const int regs = EMAC_XAHT_REGS(dev);
+        u32 *gaht_base = emac_gaht_base(dev);
+        u32 gaht_temp[regs];
         struct dev_mc_list *dmi;
+        int i;
 
         DBG(dev, "hash_mc %d" NL, dev->ndev->mc_count);
 
+        memset(gaht_temp, 0, sizeof (gaht_temp));
+
         for (dmi = dev->ndev->mc_list; dmi; dmi = dmi->next) {
-                int bit;
+                int slot, reg, mask;
                 DBG2(dev, "mc %02x:%02x:%02x:%02x:%02x:%02x" NL,
                      dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2],
                      dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]);
 
-                bit = 63 - (ether_crc(ETH_ALEN, dmi->dmi_addr) >> 26);
-                gaht[bit >> 4] |= 0x8000 >> (bit & 0x0f);
+                slot = EMAC_XAHT_CRC_TO_SLOT(dev, ether_crc(ETH_ALEN, dmi->dmi_addr));
+                reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
+                mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
+
+                gaht_temp[reg] |= mask;
         }
-        out_be32(&p->gaht1, gaht[0]);
-        out_be32(&p->gaht2, gaht[1]);
-        out_be32(&p->gaht3, gaht[2]);
-        out_be32(&p->gaht4, gaht[3]);
+
+        for (i = 0; i < regs; i++)
+                out_be32(gaht_base + i, gaht_temp[i]);
 }
 
 static inline u32 emac_iff2rmr(struct net_device *ndev)
@@ -398,7 +404,8 @@ static inline u32 emac_iff2rmr(struct net_device *ndev)
 
         if (ndev->flags & IFF_PROMISC)
                 r |= EMAC_RMR_PME;
-        else if (ndev->flags & IFF_ALLMULTI || ndev->mc_count > 32)
+        else if (ndev->flags & IFF_ALLMULTI ||
+                         (ndev->mc_count > EMAC_XAHT_SLOTS(dev)))
                 r |= EMAC_RMR_PMME;
         else if (ndev->mc_count > 0)
                 r |= EMAC_RMR_MAE;
@@ -542,7 +549,7 @@ static int emac_configure(struct emac_instance *dev)
                         /* Put some arbitrary OUI, Manuf & Rev IDs so we can
                          * identify this GPCS PHY later.
                          */
-                        out_be32(&p->ipcr, 0xdeadbeef);
+                        out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
                 } else
                         mr1 |= EMAC_MR1_MF_1000;
 
@@ -2015,10 +2022,10 @@ static int emac_get_regs_len(struct emac_instance *dev)
 {
         if (emac_has_feature(dev, EMAC_FTR_EMAC4))
                 return sizeof(struct emac_ethtool_regs_subhdr) +
-                        EMAC4_ETHTOOL_REGS_SIZE;
+                        EMAC4_ETHTOOL_REGS_SIZE(dev);
         else
                 return sizeof(struct emac_ethtool_regs_subhdr) +
-                        EMAC_ETHTOOL_REGS_SIZE;
+                        EMAC_ETHTOOL_REGS_SIZE(dev);
 }
 
 static int emac_ethtool_get_regs_len(struct net_device *ndev)
@@ -2045,12 +2052,12 @@ static void *emac_dump_regs(struct emac_instance *dev, void *buf)
         hdr->index = dev->cell_index;
         if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
                 hdr->version = EMAC4_ETHTOOL_REGS_VER;
-                memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE);
-                return ((void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE);
+                memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev));
+                return ((void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev));
         } else {
                 hdr->version = EMAC_ETHTOOL_REGS_VER;
-                memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE);
-                return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE);
+                memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev));
+                return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev));
         }
 }
 
@@ -2540,7 +2547,9 @@ static int __devinit emac_init_config(struct emac_instance *dev)
         }
 
         /* Check EMAC version */
-        if (of_device_is_compatible(np, "ibm,emac4")) {
+        if (of_device_is_compatible(np, "ibm,emac4sync")) {
+                dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
+        } else if (of_device_is_compatible(np, "ibm,emac4")) {
                 dev->features |= EMAC_FTR_EMAC4;
                 if (of_device_is_compatible(np, "ibm,emac-440gx"))
                         dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
@@ -2601,6 +2610,15 @@ static int __devinit emac_init_config(struct emac_instance *dev)
         }
         memcpy(dev->ndev->dev_addr, p, 6);
 
+        /* IAHT and GAHT filter parameterization */
+        if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
+                dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
+                dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
+        } else {
+                dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
+                dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
+        }
+
         DBG(dev, "features     : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
         DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
         DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
@@ -2672,7 +2690,8 @@ static int __devinit emac_probe(struct of_device *ofdev,
                 goto err_irq_unmap;
         }
         // TODO : request_mem_region
-        dev->emacp = ioremap(dev->rsrc_regs.start, sizeof(struct emac_regs));
+        dev->emacp = ioremap(dev->rsrc_regs.start,
+                             dev->rsrc_regs.end - dev->rsrc_regs.start + 1);
         if (dev->emacp == NULL) {
                 printk(KERN_ERR "%s: Can't map device registers!\n",
                        np->full_name);
@@ -2884,6 +2903,10 @@ static struct of_device_id emac_match[] =
                 .type           = "network",
                 .compatible     = "ibm,emac4",
         },
+        {
+                .type           = "network",
+                .compatible     = "ibm,emac4sync",
+        },
         {},
 };