[v6,08/11] hw/net: General GMAC Implementation

Commit Message

Nabih Estefan Dec. 11, 2023, 5:29 p.m. UTC

From: Nabih Estefan Diaz <[e-mail]>

- General GMAC Register handling
- GMAC IRQ Handling
- Added traces in some methods for debugging
- Lots of declarations for accessing information on GMAC Descriptors (npcm_gmac.h file)

NOTE: With code on this state, the GMAC can boot-up properly and will show up in the ifconfig command on the BMC

Change-Id: I2658c0cbec4a73b5cd1ea90cfdcabec9eaca1c46
Signed-off-by: Nabih Estefan <[e-mail]>
Reviewed-by: Tyrone Ting <[e-mail]>
---
 hw/net/npcm_gmac.c         |  26 -----
 include/hw/net/npcm_gmac.h | 198 ++++++++++++++++++++++++++++++++++---
 2 files changed, 184 insertions(+), 40 deletions(-)

Patch

diff --git a/hw/net/npcm_gmac.c b/hw/net/npcm_gmac.c
index 6f8109e0ee..220955346c 100644
--- a/hw/net/npcm_gmac.c
+++ b/hw/net/npcm_gmac.c
@@ -305,22 +305,6 @@  static void npcm_gmac_write(void *opaque, hwaddr offset,
         break;
 
     case A_NPCM_GMAC_MAC_CONFIG:
-        prev = gmac->regs[offset / sizeof(uint32_t)];
-        gmac->regs[offset / sizeof(uint32_t)] = v;
-
-        /* If transmit is being enabled for first time, update desc addr */
-        if (~(prev & NPCM_GMAC_MAC_CONFIG_TX_EN) &
-             (v & NPCM_GMAC_MAC_CONFIG_TX_EN)) {
-            gmac->regs[R_NPCM_DMA_HOST_TX_DESC] =
-                gmac->regs[R_NPCM_DMA_TX_BASE_ADDR];
-        }
-
-        /* If receive is being enabled for first time, update desc addr */
-        if (~(prev & NPCM_GMAC_MAC_CONFIG_RX_EN) &
-             (v & NPCM_GMAC_MAC_CONFIG_RX_EN)) {
-            gmac->regs[R_NPCM_DMA_HOST_RX_DESC] =
-                gmac->regs[R_NPCM_DMA_RX_BASE_ADDR];
-        }
         break;
 
     case A_NPCM_GMAC_MII_ADDR:
@@ -371,16 +355,6 @@  static void npcm_gmac_write(void *opaque, hwaddr offset,
                           "%s: Write of read-only bits of reg: offset: 0x%04"
                            HWADDR_PRIx ", value: 0x%04" PRIx64 "\n",
                            DEVICE(gmac)->canonical_path, offset, v);
-        } else {
-            /* for W1c bits, implement W1C */
-            gmac->regs[offset / sizeof(uint32_t)] &=
-                ~NPCM_DMA_STATUS_W1C_MASK(v);
-            if (v & NPCM_DMA_STATUS_NIS_BITS) {
-                gmac->regs[offset / sizeof(uint32_t)] &= ~NPCM_DMA_STATUS_NIS;
-            }
-            if (v & NPCM_DMA_STATUS_AIS_BITS) {
-                gmac->regs[offset / sizeof(uint32_t)] &= ~NPCM_DMA_STATUS_AIS;
-            }
         }
         break;
 
diff --git a/include/hw/net/npcm_gmac.h b/include/hw/net/npcm_gmac.h
index e5729e83ea..c97eb6fe6e 100644
--- a/include/hw/net/npcm_gmac.h
+++ b/include/hw/net/npcm_gmac.h
@@ -34,13 +34,15 @@  struct NPCMGMACRxDesc {
 };
 
 /* NPCMGMACRxDesc.flags values */
-/* RDES2 and RDES3 are buffer address pointers */
-/* Owner: 0 = software, 1 = gmac */
-#define RX_DESC_RDES0_OWNER_MASK BIT(31)
+/* RDES2 and RDES3 are buffer addresses */
+/* Owner: 0 = software, 1 = dma */
+#define RX_DESC_RDES0_OWN BIT(31)
 /* Destination Address Filter Fail */
-#define RX_DESC_RDES0_DEST_ADDR_FILT_FAIL_MASK BIT(30)
-/* Frame length*/
-#define RX_DESC_RDES0_FRAME_LEN_MASK(word) extract32(word, 16, 29)
+#define RX_DESC_RDES0_DEST_ADDR_FILT_FAIL BIT(30)
+/* Frame length */
+#define RX_DESC_RDES0_FRAME_LEN_MASK(word) extract32(word, 16, 14)
+/* Frame length Shift*/
+#define RX_DESC_RDES0_FRAME_LEN_SHIFT 16
 /* Error Summary */
 #define RX_DESC_RDES0_ERR_SUMM_MASK BIT(15)
 /* Descriptor Error */
@@ -83,9 +85,9 @@  struct NPCMGMACRxDesc {
 /* Receive Buffer 2 Size */
 #define RX_DESC_RDES1_BFFR2_SZ_SHIFT 11
 #define RX_DESC_RDES1_BFFR2_SZ_MASK(word) extract32(word, \
-    RX_DESC_RDES1_BFFR2_SZ_SHIFT, 10 + RX_DESC_RDES1_BFFR2_SZ_SHIFT)
+    RX_DESC_RDES1_BFFR2_SZ_SHIFT, 11)
 /* Receive Buffer 1 Size */
-#define RX_DESC_RDES1_BFFR1_SZ_MASK(word) extract32(word, 0, 10)
+#define RX_DESC_RDES1_BFFR1_SZ_MASK(word) extract32(word, 0, 11)
 
 
 struct NPCMGMACTxDesc {
@@ -96,9 +98,9 @@  struct NPCMGMACTxDesc {
 };
 
 /* NPCMGMACTxDesc.flags values */
-/* TDES2 and TDES3 are buffer address pointers */
+/* TDES2 and TDES3 are buffer addresses */
 /* Owner: 0 = software, 1 = gmac */
-#define TX_DESC_TDES0_OWNER_MASK BIT(31)
+#define TX_DESC_TDES0_OWN BIT(31)
 /* Tx Time Stamp Status */
 #define TX_DESC_TDES0_TTSS_MASK BIT(17)
 /* IP Header Error */
@@ -122,7 +124,7 @@  struct NPCMGMACTxDesc {
 /* VLAN Frame */
 #define TX_DESC_TDES0_VLAN_FRM_MASK BIT(7)
 /* Collision Count */
-#define TX_DESC_TDES0_COLL_CNT_MASK(word) extract32(word, 3, 6)
+#define TX_DESC_TDES0_COLL_CNT_MASK(word) extract32(word, 3, 4)
 /* Excessive Deferral */
 #define TX_DESC_TDES0_EXCS_DEF_MASK BIT(2)
 /* Underflow Error */
@@ -137,7 +139,7 @@  struct NPCMGMACTxDesc {
 /* Last Segment */
 #define TX_DESC_TDES1_FIRST_SEG_MASK BIT(29)
 /* Checksum Insertion Control */
-#define TX_DESC_TDES1_CHKSM_INS_CTRL_MASK(word) extract32(word, 27, 28)
+#define TX_DESC_TDES1_CHKSM_INS_CTRL_MASK(word) extract32(word, 27, 2)
 /* Disable Cyclic Redundancy Check */
 #define TX_DESC_TDES1_DIS_CDC_MASK BIT(26)
 /* Transmit End of Ring */
@@ -145,9 +147,9 @@  struct NPCMGMACTxDesc {
 /* Secondary Address Chained */
 #define TX_DESC_TDES1_SEC_ADDR_CHND_MASK BIT(24)
 /* Transmit Buffer 2 Size */
-#define TX_DESC_TDES1_BFFR2_SZ_MASK(word) extract32(word, 11, 21)
+#define TX_DESC_TDES1_BFFR2_SZ_MASK(word) extract32(word, 11, 11)
 /* Transmit Buffer 1 Size */
-#define TX_DESC_TDES1_BFFR1_SZ_MASK(word) extract32(word, 0, 10)
+#define TX_DESC_TDES1_BFFR1_SZ_MASK(word) extract32(word, 0, 11)
 
 typedef struct NPCMGMACState {
     SysBusDevice parent;
@@ -165,4 +167,172 @@  typedef struct NPCMGMACState {
 #define TYPE_NPCM_GMAC "npcm-gmac"
 OBJECT_DECLARE_SIMPLE_TYPE(NPCMGMACState, NPCM_GMAC)
 
+/* Mask for RO bits in Status */
+#define NPCM_DMA_STATUS_RO_MASK(word) (word & 0xfffe0000)
+/* Mask for RO bits in Status */
+#define NPCM_DMA_STATUS_W1C_MASK(word) (word & 0x1e7ff)
+
+/* Transmit Process State */
+#define NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT 20
+/* Transmit States */
+#define NPCM_DMA_STATUS_TX_STOPPED_STATE \
+    (0b000 << NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_TX_RUNNING_FETCHING_STATE \
+    (0b001 << NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_TX_RUNNING_WAITING_STATE \
+    (0b010 << NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_TX_RUNNING_READ_STATE \
+    (0b011 << NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_TX_SUSPENDED_STATE \
+    (0b110 << NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_TX_RUNNING_CLOSING_STATE \
+    (0b111 << NPCM_DMA_STATUS_TX_PROCESS_STATE_SHIFT)
+/* Transmit Process State */
+#define NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT 17
+/* Receive States */
+#define NPCM_DMA_STATUS_RX_STOPPED_STATE \
+    (0b000 << NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_RX_RUNNING_FETCHING_STATE \
+    (0b001 << NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_RX_RUNNING_WAITING_STATE \
+    (0b011 << NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_RX_SUSPENDED_STATE \
+    (0b100 << NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_RX_RUNNING_CLOSING_STATE \
+    (0b101 << NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT)
+#define NPCM_DMA_STATUS_RX_RUNNING_TRANSFERRING_STATE \
+    (0b111 << NPCM_DMA_STATUS_RX_PROCESS_STATE_SHIFT)
+
+
+/* Early Receive Interrupt */
+#define NPCM_DMA_STATUS_ERI BIT(14)
+/* Fatal Bus Error Interrupt */
+#define NPCM_DMA_STATUS_FBI BIT(13)
+/* Early transmit Interrupt */
+#define NPCM_DMA_STATUS_ETI BIT(10)
+/* Receive Watchdog Timout */
+#define NPCM_DMA_STATUS_RWT BIT(9)
+/* Receive Process Stopped */
+#define NPCM_DMA_STATUS_RPS BIT(8)
+/* Receive Buffer Unavailable */
+#define NPCM_DMA_STATUS_RU BIT(7)
+/* Receive Interrupt */
+#define NPCM_DMA_STATUS_RI BIT(6)
+/* Transmit Underflow */
+#define NPCM_DMA_STATUS_UNF BIT(5)
+/* Receive Overflow */
+#define NPCM_DMA_STATUS_OVF BIT(4)
+/* Transmit Jabber Timeout */
+#define NPCM_DMA_STATUS_TJT BIT(3)
+/* Transmit Buffer Unavailable */
+#define NPCM_DMA_STATUS_TU BIT(2)
+/* Transmit Process Stopped */
+#define NPCM_DMA_STATUS_TPS BIT(1)
+/* Transmit Interrupt */
+#define NPCM_DMA_STATUS_TI BIT(0)
+
+/* Normal Interrupt Summary */
+#define NPCM_DMA_STATUS_NIS BIT(16)
+/* Interrupts enabled by NIE */
+#define NPCM_DMA_STATUS_NIS_BITS (NPCM_DMA_STATUS_TI | \
+                                  NPCM_DMA_STATUS_TU | \
+                                  NPCM_DMA_STATUS_RI | \
+                                  NPCM_DMA_STATUS_ERI)
+/* Abnormal Interrupt Summary */
+#define NPCM_DMA_STATUS_AIS BIT(15)
+/* Interrupts enabled by AIE */
+#define NPCM_DMA_STATUS_AIS_BITS (NPCM_DMA_STATUS_TPS | \
+                                  NPCM_DMA_STATUS_TJT | \
+                                  NPCM_DMA_STATUS_OVF | \
+                                  NPCM_DMA_STATUS_UNF | \
+                                  NPCM_DMA_STATUS_RU  | \
+                                  NPCM_DMA_STATUS_RPS | \
+                                  NPCM_DMA_STATUS_RWT | \
+                                  NPCM_DMA_STATUS_ETI | \
+                                  NPCM_DMA_STATUS_FBI)
+
+/* Early Receive Interrupt Enable */
+#define NPCM_DMA_INTR_ENAB_ERE BIT(14)
+/* Fatal Bus Error Interrupt Enable */
+#define NPCM_DMA_INTR_ENAB_FBE BIT(13)
+/* Early transmit Interrupt Enable */
+#define NPCM_DMA_INTR_ENAB_ETE BIT(10)
+/* Receive Watchdog Timout Enable */
+#define NPCM_DMA_INTR_ENAB_RWE BIT(9)
+/* Receive Process Stopped Enable */
+#define NPCM_DMA_INTR_ENAB_RSE BIT(8)
+/* Receive Buffer Unavailable Enable */
+#define NPCM_DMA_INTR_ENAB_RUE BIT(7)
+/* Receive Interrupt Enable */
+#define NPCM_DMA_INTR_ENAB_RIE BIT(6)
+/* Transmit Underflow Enable */
+#define NPCM_DMA_INTR_ENAB_UNE BIT(5)
+/* Receive Overflow Enable */
+#define NPCM_DMA_INTR_ENAB_OVE BIT(4)
+/* Transmit Jabber Timeout Enable */
+#define NPCM_DMA_INTR_ENAB_TJE BIT(3)
+/* Transmit Buffer Unavailable Enable */
+#define NPCM_DMA_INTR_ENAB_TUE BIT(2)
+/* Transmit Process Stopped Enable */
+#define NPCM_DMA_INTR_ENAB_TSE BIT(1)
+/* Transmit Interrupt Enable */
+#define NPCM_DMA_INTR_ENAB_TIE BIT(0)
+
+/* Normal Interrupt Summary Enable */
+#define NPCM_DMA_INTR_ENAB_NIE BIT(16)
+/* Interrupts enabled by NIE Enable */
+#define NPCM_DMA_INTR_ENAB_NIE_BITS (NPCM_DMA_INTR_ENAB_TIE | \
+                                     NPCM_DMA_INTR_ENAB_TUE | \
+                                     NPCM_DMA_INTR_ENAB_RIE | \
+                                     NPCM_DMA_INTR_ENAB_ERE)
+/* Abnormal Interrupt Summary Enable */
+#define NPCM_DMA_INTR_ENAB_AIE BIT(15)
+/* Interrupts enabled by AIE Enable */
+#define NPCM_DMA_INTR_ENAB_AIE_BITS (NPCM_DMA_INTR_ENAB_TSE | \
+                                     NPCM_DMA_INTR_ENAB_TJE | \
+                                     NPCM_DMA_INTR_ENAB_OVE | \
+                                     NPCM_DMA_INTR_ENAB_UNE | \
+                                     NPCM_DMA_INTR_ENAB_RUE | \
+                                     NPCM_DMA_INTR_ENAB_RSE | \
+                                     NPCM_DMA_INTR_ENAB_RWE | \
+                                     NPCM_DMA_INTR_ENAB_ETE | \
+                                     NPCM_DMA_INTR_ENAB_FBE)
+
+/* Flushing Disabled */
+#define NPCM_DMA_CONTROL_FLUSH_MASK BIT(24)
+/* Start/stop Transmit */
+#define NPCM_DMA_CONTROL_START_STOP_TX BIT(13)
+/* Next receive descriptor start address */
+#define NPCM_DMA_HOST_RX_DESC_MASK(word) ((uint32_t) (word) & ~3u)
+/* Next transmit descriptor start address */
+#define NPCM_DMA_HOST_TX_DESC_MASK(word) ((uint32_t) (word) & ~3u)
+
+/* Receive enable */
+#define NPCM_GMAC_MAC_CONFIG_RX_EN BIT(2)
+/* Transmit enable */
+#define NPCM_GMAC_MAC_CONFIG_TX_EN BIT(3)
+
+/* Frame Receive All */
+#define NPCM_GMAC_FRAME_FILTER_REC_ALL_MASK BIT(31)
+/* Frame HPF Filter*/
+#define NPCM_GMAC_FRAME_FILTER_HPF_MASK BIT(10)
+/* Frame SAF Filter*/
+#define NPCM_GMAC_FRAME_FILTER_SAF_MASK BIT(9)
+/* Frame SAIF Filter*/
+#define NPCM_GMAC_FRAME_FILTER_SAIF_MASK BIT(8)
+/* Frame PCF Filter*/
+#define NPCM_GMAC_FRAME_FILTER_PCF_MASK BIT(word) extract32((word), 6, 2)
+/* Frame DBF Filter*/
+#define NPCM_GMAC_FRAME_FILTER_DBF_MASK BIT(5)
+/* Frame PM Filter*/
+#define NPCM_GMAC_FRAME_FILTER_PM_MASK BIT(4)
+/* Frame DAIF Filter*/
+#define NPCM_GMAC_FRAME_FILTER_DAIF_MASK BIT(3)
+/* Frame HMC Filter*/
+#define NPCM_GMAC_FRAME_FILTER_HMC_MASK BIT(2)
+/* Frame HUC Filter*/
+#define NPCM_GMAC_FRAME_FILTER_HUC_MASK BIT(1)
+/* Frame PR Filter*/
+#define NPCM_GMAC_FRAME_FILTER_PR_MASK BIT(0)
+
 #endif /* NPCM_GMAC_H */