Author: mmel
Date: Fri Jun 19 18:04:41 2020
New Revision: 362399
URL: https://svnweb.freebsd.org/changeset/base/362399
Log:
Use naming nomenclature used in DesignWare TRM.
Use naming nomenclature used in DesignWare TRM.
This driver was written by using Altera (now Intel) documentation for Arria
FPGA manual. Unfortunately this manual used very different (and in some cases
opposite naming) for registers and descriptor fields. Unfortunately,
this makes future expansion extremely hard.
Should not been functional change.
MFC after: 4 weeks
Modified:
head/sys/dev/dwc/if_dwc.c
Modified: head/sys/dev/dwc/if_dwc.c
==============================================================================
--- head/sys/dev/dwc/if_dwc.c Fri Jun 19 18:02:29 2020 (r362398)
+++ head/sys/dev/dwc/if_dwc.c Fri Jun 19 18:04:41 2020 (r362399)
@@ -93,46 +93,113 @@ __FBSDID("$FreeBSD$");
#define DWC_ASSERT_LOCKED(sc) mtx_assert(&(sc)->mtx, MA_OWNED)
#define DWC_ASSERT_UNLOCKED(sc) mtx_assert(&(sc)->mtx,
MA_NOTOWNED)
-#define DDESC_TDES0_OWN (1U << 31)
-#define DDESC_TDES0_TXINT (1U << 30)
-#define DDESC_TDES0_TXLAST (1U << 29)
-#define DDESC_TDES0_TXFIRST (1U << 28)
-#define DDESC_TDES0_TXCRCDIS (1U << 27)
-#define DDESC_TDES0_TXRINGEND (1U << 21)
-#define DDESC_TDES0_TXCHAIN (1U << 20)
+/* TX descriptors - TDESC0 is almost unified */
+#define TDESC0_OWN (1U << 31)
+#define TDESC0_IHE (1U << 16) /* IP Header Error */
+#define TDESC0_ES (1U << 15) /* Error Summary */
+#define TDESC0_JT (1U << 14) /* Jabber Timeout */
+#define TDESC0_FF (1U << 13) /* Frame Flushed */
+#define TDESC0_PCE (1U << 12) /* Payload Checksum
Error */
+#define TDESC0_LOC (1U << 11) /* Loss of Carrier */
+#define TDESC0_NC (1U << 10) /* No Carrier */
+#define TDESC0_LC (1U << 9) /* Late Collision */
+#define TDESC0_EC (1U << 8) /* Excessive Collision
*/
+#define TDESC0_VF (1U << 7) /* VLAN Frame */
+#define TDESC0_CC_MASK 0xf
+#define TDESC0_CC_SHIFT 3 /* Collision Count */
+#define TDESC0_ED (1U << 2) /* Excessive Deferral */
+#define TDESC0_UF (1U << 1) /* Underflow Error */
+#define TDESC0_DB (1U << 0) /* Deferred Bit */
+/* TX descriptors - TDESC0 extended format only */
+#define ETDESC0_IC (1U << 30) /* Interrupt on
Completion */
+#define ETDESC0_LS (1U << 29) /* Last Segment */
+#define ETDESC0_FS (1U << 28) /* First Segment */
+#define ETDESC0_DC (1U << 27) /* Disable CRC */
+#define ETDESC0_DP (1U << 26) /* Disable Padding */
+#define ETDESC0_CIC_NONE (0U << 22) /* Checksum Insertion
Control */
+#define ETDESC0_CIC_HDR (1U << 22)
+#define ETDESC0_CIC_SEG (2U << 22)
+#define ETDESC0_CIC_FULL (3U << 22)
+#define ETDESC0_TER (1U << 21) /* Transmit End of Ring
*/
+#define ETDESC0_TCH (1U << 20) /* Second Address
Chained */
-#define DDESC_RDES0_OWN (1U << 31)
-#define DDESC_RDES0_FL_MASK 0x3fff
-#define DDESC_RDES0_FL_SHIFT 16 /* Frame Length */
-#define DDESC_RDES1_CHAINED (1U << 14)
+/* TX descriptors - TDESC1 normal format */
+#define NTDESC1_IC (1U << 31) /* Interrupt on
Completion */
+#define NTDESC1_LS (1U << 30) /* Last Segment */
+#define NTDESC1_FS (1U << 29) /* First Segment */
+#define NTDESC1_CIC_NONE (0U << 27) /* Checksum Insertion
Control */
+#define NTDESC1_CIC_HDR (1U << 27)
+#define NTDESC1_CIC_SEG (2U << 27)
+#define NTDESC1_CIC_FULL (3U << 27)
+#define NTDESC1_DC (1U << 26) /* Disable CRC */
+#define NTDESC1_TER (1U << 25) /* Transmit End of Ring
*/
+#define NTDESC1_TCH (1U << 24) /* Second Address
Chained */
+/* TX descriptors - TDESC1 extended format */
+#define ETDESC1_DP (1U << 23) /* Disable Padding */
+#define ETDESC1_TBS2_MASK 0x7ff
+#define ETDESC1_TBS2_SHIFT 11 /* Receive Buffer 2
Size */
+#define ETDESC1_TBS1_MASK 0x7ff
+#define ETDESC1_TBS1_SHIFT 0 /* Receive Buffer 1
Size */
-/* Alt descriptor bits. */
-#define DDESC_CNTL_TXINT (1U << 31)
-#define DDESC_CNTL_TXLAST (1U << 30)
-#define DDESC_CNTL_TXFIRST (1U << 29)
-#define DDESC_CNTL_TXCRCDIS (1U << 26)
-#define DDESC_CNTL_TXRINGEND (1U << 25)
-#define DDESC_CNTL_TXCHAIN (1U << 24)
+/* RX descriptor - RDESC0 is unified */
+#define RDESC0_OWN (1U << 31)
+#define RDESC0_AFM (1U << 30) /* Dest. Address Filter
Fail */
+#define RDESC0_FL_MASK 0x3fff
+#define RDESC0_FL_SHIFT 16 /* Frame Length */
+#define RDESC0_ES (1U << 15) /* Error Summary */
+#define RDESC0_DE (1U << 14) /* Descriptor Error */
+#define RDESC0_SAF (1U << 13) /* Source Address
Filter Fail */
+#define RDESC0_LE (1U << 12) /* Length Error */
+#define RDESC0_OE (1U << 11) /* Overflow Error */
+#define RDESC0_VLAN (1U << 10) /* VLAN Tag */
+#define RDESC0_FS (1U << 9) /* First Descriptor */
+#define RDESC0_LS (1U << 8) /* Last Descriptor */
+#define RDESC0_ICE (1U << 7) /* IPC Checksum Error */
+#define RDESC0_GF (1U << 7) /* Giant Frame */
+#define RDESC0_LC (1U << 6) /* Late Collision */
+#define RDESC0_FT (1U << 5) /* Frame Type */
+#define RDESC0_RWT (1U << 4) /* Receive Watchdog
Timeout */
+#define RDESC0_RE (1U << 3) /* Receive Error */
+#define RDESC0_DBE (1U << 2) /* Dribble Bit Error */
+#define RDESC0_CE (1U << 1) /* CRC Error */
+#define RDESC0_PCE (1U << 0) /* Payload Checksum
Error */
+#define RDESC0_RXMA (1U << 0) /* Rx MAC Address */
-#define DDESC_CNTL_CHAINED (1U << 24)
+/* RX descriptors - RDESC1 normal format */
+#define NRDESC1_DIC (1U << 31) /* Disable Intr on
Completion */
+#define NRDESC1_RER (1U << 25) /* Receive End of Ring
*/
+#define NRDESC1_RCH (1U << 24) /* Second Address
Chained */
+#define NRDESC1_RBS2_MASK 0x7ff
+#define NRDESC1_RBS2_SHIFT 11 /* Receive Buffer 2
Size */
+#define NRDESC1_RBS1_MASK 0x7ff
+#define NRDESC1_RBS1_SHIFT 0 /* Receive Buffer 1
Size */
+/* RX descriptors - RDESC1 enhanced format */
+#define ERDESC1_DIC (1U << 31) /* Disable Intr on
Completion */
+#define ERDESC1_RBS2_MASK 0x7ffff
+#define ERDESC1_RBS2_SHIFT 16 /* Receive Buffer 2
Size */
+#define ERDESC1_RER (1U << 15) /* Receive End of Ring
*/
+#define ERDESC1_RCH (1U << 14) /* Second Address
Chained */
+#define ERDESC1_RBS1_MASK 0x7ffff
+#define ERDESC1_RBS1_SHIFT 0 /* Receive Buffer 1
Size */
+
/*
* A hardware buffer descriptor. Rx and Tx buffers have the same descriptor
* layout, but the bits in the fields have different meanings.
*/
struct dwc_hwdesc
{
- uint32_t tdes0; /* status for alt layout */
- uint32_t tdes1; /* cntl for alt layout */
- uint32_t addr; /* pointer to buffer data */
- uint32_t addr_next; /* link to next descriptor */
+ uint32_t desc0;
+ uint32_t desc1;
+ uint32_t addr1; /* ptr to first buffer data */
+ uint32_t addr2; /* ptr to next descriptor / second buffer data*/
};
/*
* The hardware imposes alignment restrictions on various objects involved in
* DMA transfers. These values are expressed in bytes (not bits).
*/
-#define DWC_DESC_RING_ALIGN 2048
+#define DWC_DESC_RING_ALIGN 2048
static struct resource_spec dwc_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
@@ -183,26 +250,26 @@ dwc_setup_txdesc(struct dwc_softc *sc, int idx, bus_ad
--sc->txcount;
} else {
if (sc->mactype == DWC_GMAC_ALT_DESC)
- flags = DDESC_CNTL_TXCHAIN | DDESC_CNTL_TXFIRST
- | DDESC_CNTL_TXLAST | DDESC_CNTL_TXINT;
+ flags = NTDESC1_TCH | NTDESC1_FS
+ | NTDESC1_LS | NTDESC1_IC;
else
- flags = DDESC_TDES0_TXCHAIN | DDESC_TDES0_TXFIRST
- | DDESC_TDES0_TXLAST | DDESC_TDES0_TXINT;
+ flags = ETDESC0_TCH | ETDESC0_FS | ETDESC0_LS |
+ ETDESC0_IC;
++sc->txcount;
}
- sc->txdesc_ring[idx].addr = (uint32_t)(paddr);
+ sc->txdesc_ring[idx].addr1 = (uint32_t)(paddr);
if (sc->mactype == DWC_GMAC_ALT_DESC) {
- sc->txdesc_ring[idx].tdes0 = 0;
- sc->txdesc_ring[idx].tdes1 = flags | len;
+ sc->txdesc_ring[idx].desc0 = 0;
+ sc->txdesc_ring[idx].desc1 = flags | len;
} else {
- sc->txdesc_ring[idx].tdes0 = flags;
- sc->txdesc_ring[idx].tdes1 = len;
+ sc->txdesc_ring[idx].desc0 = flags;
+ sc->txdesc_ring[idx].desc1 = len;
}
if (paddr && len) {
wmb();
- sc->txdesc_ring[idx].tdes0 |= DDESC_TDES0_OWN;
+ sc->txdesc_ring[idx].desc0 |= TDESC0_OWN;
wmb();
}
@@ -466,17 +533,17 @@ dwc_setup_rxdesc(struct dwc_softc *sc, int idx, bus_ad
{
uint32_t nidx;
- sc->rxdesc_ring[idx].addr = (uint32_t)paddr;
+ sc->rxdesc_ring[idx].addr1 = (uint32_t)paddr;
nidx = next_rxidx(sc, idx);
- sc->rxdesc_ring[idx].addr_next = sc->rxdesc_ring_paddr +
+ sc->rxdesc_ring[idx].addr2 = sc->rxdesc_ring_paddr +
(nidx * sizeof(struct dwc_hwdesc));
if (sc->mactype == DWC_GMAC_ALT_DESC)
- sc->rxdesc_ring[idx].tdes1 = DDESC_CNTL_CHAINED | RX_MAX_PACKET;
+ sc->rxdesc_ring[idx].desc1 = NRDESC1_RCH | RX_MAX_PACKET;
else
- sc->rxdesc_ring[idx].tdes1 = DDESC_RDES1_CHAINED | MCLBYTES;
+ sc->rxdesc_ring[idx].desc1 = ERDESC1_RCH | MCLBYTES;
wmb();
- sc->rxdesc_ring[idx].tdes0 = DDESC_RDES0_OWN;
+ sc->rxdesc_ring[idx].desc0 = RDESC0_OWN;
wmb();
return (nidx);
@@ -729,7 +796,7 @@ dwc_txfinish_locked(struct dwc_softc *sc)
ifp = sc->ifp;
while (sc->tx_idx_tail != sc->tx_idx_head) {
desc = &sc->txdesc_ring[sc->tx_idx_tail];
- if ((desc->tdes0 & DDESC_TDES0_OWN) != 0)
+ if ((desc->desc0 & TDESC0_OWN) != 0)
break;
bmap = &sc->txbuf_map[sc->tx_idx_tail];
bus_dmamap_sync(sc->txbuf_tag, bmap->map,
@@ -763,15 +830,15 @@ dwc_rxfinish_locked(struct dwc_softc *sc)
for (;;) {
idx = sc->rx_idx;
- rdes0 = sc->rxdesc_ring[idx].tdes0;
- if ((rdes0 & DDESC_RDES0_OWN) != 0)
+ rdes0 = sc->rxdesc_ring[idx].desc0;
+ if ((rdes0 & RDESC0_OWN) != 0)
break;
bus_dmamap_sync(sc->rxbuf_tag, sc->rxbuf_map[idx].map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->rxbuf_tag, sc->rxbuf_map[idx].map);
- len = (rdes0 >> DDESC_RDES0_FL_SHIFT) & DDESC_RDES0_FL_MASK;
+ len = (rdes0 >> RDESC0_FL_SHIFT) & RDESC0_FL_MASK;
if (len != 0) {
m = sc->rxbuf_map[idx].mbuf;
m->m_pkthdr.rcvif = ifp;
@@ -890,7 +957,7 @@ setup_dma(struct dwc_softc *sc)
for (idx = 0; idx < TX_DESC_COUNT; idx++) {
nidx = next_txidx(sc, idx);
- sc->txdesc_ring[idx].addr_next = sc->txdesc_ring_paddr +
+ sc->txdesc_ring[idx].addr2 = sc->txdesc_ring_paddr +
(nidx * sizeof(struct dwc_hwdesc));
}
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