[RFC PATCH 05/13] rtl8139: use the DMA memory access interface

Eduard - Gabriel Munteanu
2011-06-01T01:39:00Z

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

Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
---
hw/rtl8139.c | 98 ++++++++++++++++++++++++++++++---------------------------
1 files changed, 52 insertions(+), 46 deletions(-)

diff --git a/hw/rtl8139.c b/hw/rtl8139.c
index c7c7a3c..5b70391 100644
--- a/hw/rtl8139.c
+++ b/hw/rtl8139.c
@@ -424,12 +424,6 @@ 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 +504,14 @@ 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 +773,15 @@ 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 );
+ pci_memory_write(&s->dev, 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 );
+ pci_memory_write(&s->dev, s->RxBuf + s->RxBufAddr,
+ buf + (size-wrapped), wrapped);

s->RxBufAddr = wrapped;

@@ -788,7 +790,7 @@ 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 );
+ pci_memory_write(&s->dev, s->RxBuf + s->RxBufAddr, buf, size);

s->RxBufAddr += size;
}
@@ -828,6 +830,7 @@ static int rtl8139_can_receive(VLANClientState *nc)
static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt)
{
RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
+
/* size is the length of the buffer passed to the driver */
int size = size_;
const uint8_t *dot1q_buf = NULL;
@@ -988,13 +991,13 @@ 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);
+ pci_memory_read(&s->dev, 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);
+ pci_memory_read(&s->dev, 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);
+ pci_memory_read(&s->dev, 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);
+ pci_memory_read(&s->dev, 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 +1065,12 @@ 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);
+ pci_memory_write(&s->dev, rx_addr, buf, 2 * ETHER_ADDR_LEN);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, rx_addr, buf, size);
}

if (s->CpCmd & CPlusRxChkSum)
@@ -1077,7 +1080,7 @@ 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);
+ pci_memory_write(&s->dev, rx_addr + size, (uint8_t *)&val, 4);

/* first segment of received packet flag */
#define CP_RX_STATUS_FS (1<<29)
@@ -1123,9 +1126,9 @@ 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, cplus_rx_ring_desc+4, (uint8_t *)&val, 4);

/* update tally counter */
++s->tally_counters.RxOk;
@@ -1305,50 +1308,53 @@ 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, 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);
+ pci_memory_write(&s->dev, tc_addr + 62, (uint8_t *)&val16, 2);
}

/* Loads values of tally counters from VM state file */
@@ -1836,7 +1842,7 @@ 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);
+ pci_memory_read(&s->dev, s->TxAddr[descriptor], txbuffer, txsize);

/* Mark descriptor as transferred */
s->TxStatus[descriptor] |= TxHostOwns;
@@ -1969,13 +1975,13 @@ 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);
+ pci_memory_read(&s->dev, 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);
+ pci_memory_read(&s->dev, 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);
+ pci_memory_read(&s->dev, 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);
+ pci_memory_read(&s->dev, 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,
@@ -2083,7 +2089,8 @@ 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);
+ pci_memory_read(&s->dev, tx_addr,
+ s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
s->cplus_txbuffer_offset += txsize;

/* seek to next Rx descriptor */
@@ -2110,7 +2117,7 @@ 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);
+ pci_memory_write(&s->dev, 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)
@@ -2451,7 +2458,6 @@ 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 */
@@ -2469,7 +2475,7 @@ 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;
--
1.7.3.4