[PATCH 5/7] rtl8139: use the PCI memory access interface

Eduard - Gabriel Munteanu
2010-08-28T14:56:55Z

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

Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
---
hw/rtl8139.c | 99 ++++++++++++++++++++++++++++++++-------------------------
1 files changed, 56 insertions(+), 43 deletions(-)

diff --git a/hw/rtl8139.c b/hw/rtl8139.c
index d92981d..32dbff3 100644
--- a/hw/rtl8139.c
+++ b/hw/rtl8139.c
@@ -412,12 +412,6 @@ 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 */
@@ -496,6 +490,14 @@ typedef struct RTL8139State {

} 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)
@@ -746,6 +748,8 @@ static int rtl8139_cp_transmitter_enabled(RTL8139State *s)

static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
{
+ PCIDevice *dev = &s->dev;
+
if (s->RxBufAddr + size > s->RxBufferSize)
{
int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize);
@@ -757,15 +761,15 @@ 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(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(dev, s->RxBuf + s->RxBufAddr,
+ buf + (size-wrapped), wrapped);

s->RxBufAddr = wrapped;

@@ -774,7 +778,7 @@ 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(dev, s->RxBuf + s->RxBufAddr, buf, size);

s->RxBufAddr += size;
}
@@ -814,6 +818,7 @@ 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;
+ PCIDevice *dev = &s->dev;
int size = size_;

uint32_t packet_header = 0;
@@ -968,13 +973,13 @@ 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(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(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(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(dev, cplus_rx_ring_desc+12, (uint8_t *)&val, 4);
rxbufHI = le32_to_cpu(val);

DEBUG_PRINT(("RTL8139: +++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
@@ -1019,7 +1024,7 @@ static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_
target_phys_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI);

/* receive/copy to target memory */
- cpu_physical_memory_write( rx_addr, buf, size );
+ pci_memory_write(dev, rx_addr, buf, size);

if (s->CpCmd & CPlusRxChkSum)
{
@@ -1032,7 +1037,7 @@ static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_
#else
val = 0;
#endif
- cpu_physical_memory_write( rx_addr+size, (uint8_t *)&val, 4);
+ pci_memory_write(dev, rx_addr + size, (uint8_t *)&val, 4);

/* first segment of received packet flag */
#define CP_RX_STATUS_FS (1<<29)
@@ -1081,9 +1086,9 @@ 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(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(dev, cplus_rx_ring_desc+4, (uint8_t *)&val, 4);

/* update tally counter */
++s->tally_counters.RxOk;
@@ -1279,50 +1284,54 @@ 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)
{
+ PCIDevice *dev = &s->dev;
+ 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(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(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(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(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(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(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(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(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(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(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(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(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(dev, tc_addr + 62, (uint8_t *)&val16, 2);
}

/* Loads values of tally counters from VM state file */
@@ -1758,6 +1767,8 @@ static void rtl8139_transfer_frame(RTL8139State *s, const uint8_t *buf, int size

static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
{
+ PCIDevice *dev = &s->dev;
+
if (!rtl8139_transmitter_enabled(s))
{
DEBUG_PRINT(("RTL8139: +++ cannot transmit from descriptor %d: transmitter disabled\n",
@@ -1780,7 +1791,7 @@ static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
DEBUG_PRINT(("RTL8139: +++ 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(dev, s->TxAddr[descriptor], txbuffer, txsize);

/* Mark descriptor as transferred */
s->TxStatus[descriptor] |= TxHostOwns;
@@ -1886,6 +1897,8 @@ static uint16_t ip_checksum(void *data, size_t len)

static int rtl8139_cplus_transmit_one(RTL8139State *s)
{
+ PCIDevice *dev = &s->dev;
+
if (!rtl8139_transmitter_enabled(s))
{
DEBUG_PRINT(("RTL8139: +++ C+ mode: transmitter disabled\n"));
@@ -1911,14 +1924,14 @@ 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(dev, cplus_tx_ring_desc, (uint8_t *)&val, 4);
txdw0 = le32_to_cpu(val);
/* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */
- cpu_physical_memory_read(cplus_tx_ring_desc+4, (uint8_t *)&val, 4);
+ pci_memory_read(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(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(dev, cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
txbufHI = le32_to_cpu(val);

DEBUG_PRINT(("RTL8139: +++ C+ mode TX descriptor %d %08x %08x %08x %08x\n",
@@ -2025,7 +2038,8 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s)
DEBUG_PRINT(("RTL8139: +++ C+ mode transmit reading %d bytes from host memory at %016" PRIx64 " to offset %d\n",
txsize, (uint64_t)tx_addr, s->cplus_txbuffer_offset));

- cpu_physical_memory_read(tx_addr, s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
+ pci_memory_read(dev, tx_addr,
+ s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
s->cplus_txbuffer_offset += txsize;

/* seek to next Rx descriptor */
@@ -2052,10 +2066,10 @@ 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(dev, cplus_tx_ring_desc, (uint8_t *)&val, 4);
/* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */
// val = cpu_to_le32(txdw1);
-// cpu_physical_memory_write(cplus_tx_ring_desc+4, &val, 4);
+// pci_memory_write(dev, cplus_tx_ring_desc+4, &val, 4);

/* Now decide if descriptor being processed is holding the last segment of packet */
if (txdw0 & CP_TX_LS)
@@ -2364,7 +2378,6 @@ 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 */
@@ -2381,7 +2394,7 @@ 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;
--
1.7.1