[Qemu-devel] [PATCH 05/14] rtl8139: use the DMA memory access interface

[David Gibson <david@gibson.dropbear.id.au>]

This allows the device to work properly with an emulated IOMMU.

Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
---
 hw/rtl8139.c |  104 ++++++++++++++++++++++++++++++++-------------------------
 1 files changed, 58 insertions(+), 46 deletions(-)

diff --git a/hw/rtl8139.c b/hw/rtl8139.c
index 2f8db58..8d0306a 100644
--- a/hw/rtl8139.c
+++ b/hw/rtl8139.c
@@ -53,6 +53,7 @@
 
 #include "hw.h"
 #include "pci.h"
+#include "dma_rw.h"
 #include "qemu-timer.h"
 #include "net.h"
 #include "loader.h"
@@ -424,12 +425,6 @@ typedef struct RTL8139TallyCounters
     uint16_t   TxUndrn;
 } RTL8139TallyCounters;
 
-/* Clears all tally counters */
-static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters);
-
-/* Writes tally counters to specified physical memory address */
-static void RTL8139TallyCounters_physical_memory_write(target_phys_addr_t tc_addr, RTL8139TallyCounters* counters);
-
 typedef struct RTL8139State {
     PCIDevice dev;
     uint8_t phys[8]; /* mac address */
@@ -510,6 +505,14 @@ typedef struct RTL8139State {
     int rtl8139_mmio_io_addr_dummy;
 } RTL8139State;
 
+/* Clears all tally counters */
+static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters);
+
+/* Writes tally counters to specified physical memory address */
+static void
+RTL8139TallyCounters_physical_memory_write(RTL8139State *s,
+                                           target_phys_addr_t tc_addr);
+
 static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time);
 
 static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command)
@@ -771,15 +774,15 @@ static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
 
             if (size > wrapped)
             {
-                cpu_physical_memory_write( s->RxBuf + s->RxBufAddr,
-                                           buf, size-wrapped );
+                dma_memory_write(&s->dev.qdev, s->RxBuf + s->RxBufAddr,
+                                 buf, size-wrapped);
             }
 
             /* reset buffer pointer */
             s->RxBufAddr = 0;
 
-            cpu_physical_memory_write( s->RxBuf + s->RxBufAddr,
-                                       buf + (size-wrapped), wrapped );
+            dma_memory_write(&s->dev.qdev, s->RxBuf + s->RxBufAddr,
+                             buf + (size-wrapped), wrapped);
 
             s->RxBufAddr = wrapped;
 
@@ -788,7 +791,7 @@ static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
     }
 
     /* non-wrapping path or overwrapping enabled */
-    cpu_physical_memory_write( s->RxBuf + s->RxBufAddr, buf, size );
+    dma_memory_write(&s->dev.qdev, s->RxBuf + s->RxBufAddr, buf, size);
 
     s->RxBufAddr += size;
 }
@@ -988,13 +991,17 @@ static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_
 
         uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI;
 
-        cpu_physical_memory_read(cplus_rx_ring_desc,    (uint8_t *)&val, 4);
+        dma_memory_read(&s->dev.qdev, cplus_rx_ring_desc,
+                        (uint8_t *)&val, 4);
         rxdw0 = le32_to_cpu(val);
-        cpu_physical_memory_read(cplus_rx_ring_desc+4,  (uint8_t *)&val, 4);
+        dma_memory_read(&s->dev.qdev, cplus_rx_ring_desc+4,
+                        (uint8_t *)&val, 4);
         rxdw1 = le32_to_cpu(val);
-        cpu_physical_memory_read(cplus_rx_ring_desc+8,  (uint8_t *)&val, 4);
+        dma_memory_read(&s->dev.qdev, cplus_rx_ring_desc+8,
+                        (uint8_t *)&val, 4);
         rxbufLO = le32_to_cpu(val);
-        cpu_physical_memory_read(cplus_rx_ring_desc+12, (uint8_t *)&val, 4);
+        dma_memory_read(&s->dev.qdev, cplus_rx_ring_desc+12,
+                        (uint8_t *)&val, 4);
         rxbufHI = le32_to_cpu(val);
 
         DPRINTF("+++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
@@ -1062,12 +1069,12 @@ static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_
 
         /* receive/copy to target memory */
         if (dot1q_buf) {
-            cpu_physical_memory_write(rx_addr, buf, 2 * ETHER_ADDR_LEN);
-            cpu_physical_memory_write(rx_addr + 2 * ETHER_ADDR_LEN,
-                buf + 2 * ETHER_ADDR_LEN + VLAN_HLEN,
-                size - 2 * ETHER_ADDR_LEN);
+            dma_memory_write(&s->dev.qdev, rx_addr, buf, 2 * ETHER_ADDR_LEN);
+            dma_memory_write(&s->dev.qdev, rx_addr + 2 * ETHER_ADDR_LEN,
+                             buf + 2 * ETHER_ADDR_LEN + VLAN_HLEN,
+                             size - 2 * ETHER_ADDR_LEN);
         } else {
-            cpu_physical_memory_write(rx_addr, buf, size);
+            dma_memory_write(&s->dev.qdev, rx_addr, buf, size);
         }
 
         if (s->CpCmd & CPlusRxChkSum)
@@ -1077,7 +1084,7 @@ static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_
 
         /* write checksum */
         val = cpu_to_le32(crc32(0, buf, size_));
-        cpu_physical_memory_write( rx_addr+size, (uint8_t *)&val, 4);
+        dma_memory_write(&s->dev.qdev, rx_addr+size, (uint8_t *)&val, 4);
 
 /* first segment of received packet flag */
 #define CP_RX_STATUS_FS (1<<29)
@@ -1123,9 +1130,11 @@ static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_
 
         /* update ring data */
         val = cpu_to_le32(rxdw0);
-        cpu_physical_memory_write(cplus_rx_ring_desc,    (uint8_t *)&val, 4);
+        dma_memory_write(&s->dev.qdev, cplus_rx_ring_desc,
+                         (uint8_t *)&val, 4);
         val = cpu_to_le32(rxdw1);
-        cpu_physical_memory_write(cplus_rx_ring_desc+4,  (uint8_t *)&val, 4);
+        dma_memory_write(&s->dev.qdev, cplus_rx_ring_desc+4,
+                         (uint8_t *)&val, 4);
 
         /* update tally counter */
         ++s->tally_counters.RxOk;
@@ -1305,50 +1314,53 @@ static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters)
     counters->TxUndrn = 0;
 }
 
-static void RTL8139TallyCounters_physical_memory_write(target_phys_addr_t tc_addr, RTL8139TallyCounters* tally_counters)
+static void
+RTL8139TallyCounters_physical_memory_write(RTL8139State *s,
+                                           target_phys_addr_t tc_addr)
 {
+    RTL8139TallyCounters *tally_counters = &s->tally_counters;
     uint16_t val16;
     uint32_t val32;
     uint64_t val64;
 
     val64 = cpu_to_le64(tally_counters->TxOk);
-    cpu_physical_memory_write(tc_addr + 0,    (uint8_t *)&val64, 8);
+    dma_memory_write(&s->dev.qdev, tc_addr + 0,    (uint8_t *)&val64, 8);
 
     val64 = cpu_to_le64(tally_counters->RxOk);
-    cpu_physical_memory_write(tc_addr + 8,    (uint8_t *)&val64, 8);
+    dma_memory_write(&s->dev.qdev, tc_addr + 8,    (uint8_t *)&val64, 8);
 
     val64 = cpu_to_le64(tally_counters->TxERR);
-    cpu_physical_memory_write(tc_addr + 16,    (uint8_t *)&val64, 8);
+    dma_memory_write(&s->dev.qdev, tc_addr + 16,    (uint8_t *)&val64, 8);
 
     val32 = cpu_to_le32(tally_counters->RxERR);
-    cpu_physical_memory_write(tc_addr + 24,    (uint8_t *)&val32, 4);
+    dma_memory_write(&s->dev.qdev, tc_addr + 24,    (uint8_t *)&val32, 4);
 
     val16 = cpu_to_le16(tally_counters->MissPkt);
-    cpu_physical_memory_write(tc_addr + 28,    (uint8_t *)&val16, 2);
+    dma_memory_write(&s->dev.qdev, tc_addr + 28,    (uint8_t *)&val16, 2);
 
     val16 = cpu_to_le16(tally_counters->FAE);
-    cpu_physical_memory_write(tc_addr + 30,    (uint8_t *)&val16, 2);
+    dma_memory_write(&s->dev.qdev, tc_addr + 30,    (uint8_t *)&val16, 2);
 
     val32 = cpu_to_le32(tally_counters->Tx1Col);
-    cpu_physical_memory_write(tc_addr + 32,    (uint8_t *)&val32, 4);
+    dma_memory_write(&s->dev.qdev, tc_addr + 32,    (uint8_t *)&val32, 4);
 
     val32 = cpu_to_le32(tally_counters->TxMCol);
-    cpu_physical_memory_write(tc_addr + 36,    (uint8_t *)&val32, 4);
+    dma_memory_write(&s->dev.qdev, tc_addr + 36,    (uint8_t *)&val32, 4);
 
     val64 = cpu_to_le64(tally_counters->RxOkPhy);
-    cpu_physical_memory_write(tc_addr + 40,    (uint8_t *)&val64, 8);
+    dma_memory_write(&s->dev.qdev, tc_addr + 40,    (uint8_t *)&val64, 8);
 
     val64 = cpu_to_le64(tally_counters->RxOkBrd);
-    cpu_physical_memory_write(tc_addr + 48,    (uint8_t *)&val64, 8);
+    dma_memory_write(&s->dev.qdev, tc_addr + 48,    (uint8_t *)&val64, 8);
 
     val32 = cpu_to_le32(tally_counters->RxOkMul);
-    cpu_physical_memory_write(tc_addr + 56,    (uint8_t *)&val32, 4);
+    dma_memory_write(&s->dev.qdev, tc_addr + 56,    (uint8_t *)&val32, 4);
 
     val16 = cpu_to_le16(tally_counters->TxAbt);
-    cpu_physical_memory_write(tc_addr + 60,    (uint8_t *)&val16, 2);
+    dma_memory_write(&s->dev.qdev, tc_addr + 60,    (uint8_t *)&val16, 2);
 
     val16 = cpu_to_le16(tally_counters->TxUndrn);
-    cpu_physical_memory_write(tc_addr + 62,    (uint8_t *)&val16, 2);
+    dma_memory_write(&s->dev.qdev, tc_addr + 62,    (uint8_t *)&val16, 2);
 }
 
 /* Loads values of tally counters from VM state file */
@@ -1840,7 +1852,7 @@ static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
     DPRINTF("+++ transmit reading %d bytes from host memory at 0x%08x\n",
         txsize, s->TxAddr[descriptor]);
 
-    cpu_physical_memory_read(s->TxAddr[descriptor], txbuffer, txsize);
+    dma_memory_read(&s->dev.qdev, s->TxAddr[descriptor], txbuffer, txsize);
 
     /* Mark descriptor as transferred */
     s->TxStatus[descriptor] |= TxHostOwns;
@@ -1973,13 +1985,13 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
 
     uint32_t val, txdw0,txdw1,txbufLO,txbufHI;
 
-    cpu_physical_memory_read(cplus_tx_ring_desc,    (uint8_t *)&val, 4);
+    dma_memory_read(&s->dev.qdev, cplus_tx_ring_desc,    (uint8_t *)&val, 4);
     txdw0 = le32_to_cpu(val);
-    cpu_physical_memory_read(cplus_tx_ring_desc+4,  (uint8_t *)&val, 4);
+    dma_memory_read(&s->dev.qdev, cplus_tx_ring_desc+4,  (uint8_t *)&val, 4);
     txdw1 = le32_to_cpu(val);
-    cpu_physical_memory_read(cplus_tx_ring_desc+8,  (uint8_t *)&val, 4);
+    dma_memory_read(&s->dev.qdev, cplus_tx_ring_desc+8,  (uint8_t *)&val, 4);
     txbufLO = le32_to_cpu(val);
-    cpu_physical_memory_read(cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
+    dma_memory_read(&s->dev.qdev, cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
     txbufHI = le32_to_cpu(val);
 
     DPRINTF("+++ C+ mode TX descriptor %d %08x %08x %08x %08x\n", descriptor,
@@ -2087,7 +2099,8 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
         TARGET_FMT_plx" to offset %d\n", txsize, tx_addr,
         s->cplus_txbuffer_offset);
 
-    cpu_physical_memory_read(tx_addr, s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
+    dma_memory_read(&s->dev.qdev, tx_addr,
+                    s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
     s->cplus_txbuffer_offset += txsize;
 
     /* seek to next Rx descriptor */
@@ -2114,7 +2127,7 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
 
     /* update ring data */
     val = cpu_to_le32(txdw0);
-    cpu_physical_memory_write(cplus_tx_ring_desc,    (uint8_t *)&val, 4);
+    dma_memory_write(&s->dev.qdev, cplus_tx_ring_desc,    (uint8_t *)&val, 4);
 
     /* Now decide if descriptor being processed is holding the last segment of packet */
     if (txdw0 & CP_TX_LS)
@@ -2455,7 +2468,6 @@ static void rtl8139_transmit(RTL8139State *s)
 
 static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32_t val)
 {
-
     int descriptor = txRegOffset/4;
 
     /* handle C+ transmit mode register configuration */
@@ -2473,7 +2485,7 @@ static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32
             target_phys_addr_t tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]);
 
             /* dump tally counters to specified memory location */
-            RTL8139TallyCounters_physical_memory_write( tc_addr, &s->tally_counters);
+            RTL8139TallyCounters_physical_memory_write(s, tc_addr);
 
             /* mark dump completed */
             s->TxStatus[0] &= ~0x8;
-- 
1.7.4.4