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[PATCH 1/3] dp8393x: put the DMA buffer in the state structure
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From: |
Laurent Vivier |
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Subject: |
[PATCH 1/3] dp8393x: put the DMA buffer in the state structure |
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Date: |
Sat, 2 Nov 2019 18:15:09 +0100 |
Move it from the stack.
It's only 24 bytes, and this simplifies the dp8393x_get()/
dp8393x_put() interface.
Signed-off-by: Laurent Vivier <address@hidden>
---
hw/net/dp8393x.c | 105 ++++++++++++++++++++++-------------------------
1 file changed, 50 insertions(+), 55 deletions(-)
diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c
index 693e244ce6..85d3f3788e 100644
--- a/hw/net/dp8393x.c
+++ b/hw/net/dp8393x.c
@@ -171,6 +171,7 @@ typedef struct dp8393xState {
/* Temporaries */
uint8_t tx_buffer[0x10000];
+ uint16_t data[12];
int loopback_packet;
/* Memory access */
@@ -224,26 +225,25 @@ static uint32_t dp8393x_wt(dp8393xState *s)
return s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0];
}
-static uint16_t dp8393x_get(dp8393xState *s, int width, uint16_t *base,
- int offset)
+static uint16_t dp8393x_get(dp8393xState *s, int width, int offset)
{
uint16_t val;
if (s->big_endian) {
- val = be16_to_cpu(base[offset * width + width - 1]);
+ val = be16_to_cpu(s->data[offset * width + width - 1]);
} else {
- val = le16_to_cpu(base[offset * width]);
+ val = le16_to_cpu(s->data[offset * width]);
}
return val;
}
-static void dp8393x_put(dp8393xState *s, int width, uint16_t *base, int offset,
+static void dp8393x_put(dp8393xState *s, int width, int offset,
uint16_t val)
{
if (s->big_endian) {
- base[offset * width + width - 1] = cpu_to_be16(val);
+ s->data[offset * width + width - 1] = cpu_to_be16(val);
} else {
- base[offset * width] = cpu_to_le16(val);
+ s->data[offset * width] = cpu_to_le16(val);
}
}
@@ -267,7 +267,6 @@ static void dp8393x_update_irq(dp8393xState *s)
static void dp8393x_do_load_cam(dp8393xState *s)
{
- uint16_t data[8];
int width, size;
uint16_t index = 0;
@@ -277,13 +276,13 @@ static void dp8393x_do_load_cam(dp8393xState *s)
while (s->regs[SONIC_CDC] & 0x1f) {
/* Fill current entry */
address_space_rw(&s->as, dp8393x_cdp(s),
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
- s->cam[index][0] = dp8393x_get(s, width, data, 1) & 0xff;
- s->cam[index][1] = dp8393x_get(s, width, data, 1) >> 8;
- s->cam[index][2] = dp8393x_get(s, width, data, 2) & 0xff;
- s->cam[index][3] = dp8393x_get(s, width, data, 2) >> 8;
- s->cam[index][4] = dp8393x_get(s, width, data, 3) & 0xff;
- s->cam[index][5] = dp8393x_get(s, width, data, 3) >> 8;
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 0);
+ s->cam[index][0] = dp8393x_get(s, width, 1) & 0xff;
+ s->cam[index][1] = dp8393x_get(s, width, 1) >> 8;
+ s->cam[index][2] = dp8393x_get(s, width, 2) & 0xff;
+ s->cam[index][3] = dp8393x_get(s, width, 2) >> 8;
+ s->cam[index][4] = dp8393x_get(s, width, 3) & 0xff;
+ s->cam[index][5] = dp8393x_get(s, width, 3) >> 8;
DPRINTF("load cam[%d] with %02x%02x%02x%02x%02x%02x\n", index,
s->cam[index][0], s->cam[index][1], s->cam[index][2],
s->cam[index][3], s->cam[index][4], s->cam[index][5]);
@@ -295,8 +294,8 @@ static void dp8393x_do_load_cam(dp8393xState *s)
/* Read CAM enable */
address_space_rw(&s->as, dp8393x_cdp(s),
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
- s->regs[SONIC_CE] = dp8393x_get(s, width, data, 0);
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 0);
+ s->regs[SONIC_CE] = dp8393x_get(s, width, 0);
DPRINTF("load cam done. cam enable mask 0x%04x\n", s->regs[SONIC_CE]);
/* Done */
@@ -307,20 +306,19 @@ static void dp8393x_do_load_cam(dp8393xState *s)
static void dp8393x_do_read_rra(dp8393xState *s)
{
- uint16_t data[8];
int width, size;
/* Read memory */
width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1;
size = sizeof(uint16_t) * 4 * width;
address_space_rw(&s->as, dp8393x_rrp(s),
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 0);
/* Update SONIC registers */
- s->regs[SONIC_CRBA0] = dp8393x_get(s, width, data, 0);
- s->regs[SONIC_CRBA1] = dp8393x_get(s, width, data, 1);
- s->regs[SONIC_RBWC0] = dp8393x_get(s, width, data, 2);
- s->regs[SONIC_RBWC1] = dp8393x_get(s, width, data, 3);
+ s->regs[SONIC_CRBA0] = dp8393x_get(s, width, 0);
+ s->regs[SONIC_CRBA1] = dp8393x_get(s, width, 1);
+ s->regs[SONIC_RBWC0] = dp8393x_get(s, width, 2);
+ s->regs[SONIC_RBWC1] = dp8393x_get(s, width, 3);
DPRINTF("CRBA0/1: 0x%04x/0x%04x, RBWC0/1: 0x%04x/0x%04x\n",
s->regs[SONIC_CRBA0], s->regs[SONIC_CRBA1],
s->regs[SONIC_RBWC0], s->regs[SONIC_RBWC1]);
@@ -417,7 +415,6 @@ static void dp8393x_do_receiver_disable(dp8393xState *s)
static void dp8393x_do_transmit_packets(dp8393xState *s)
{
NetClientState *nc = qemu_get_queue(s->nic);
- uint16_t data[12];
int width, size;
int tx_len, len;
uint16_t i;
@@ -429,18 +426,17 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
size = sizeof(uint16_t) * 6 * width;
s->regs[SONIC_TTDA] = s->regs[SONIC_CTDA];
DPRINTF("Transmit packet at %08x\n", dp8393x_ttda(s));
- address_space_rw(&s->as,
- dp8393x_ttda(s) + sizeof(uint16_t) * width,
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
+ address_space_rw(&s->as, dp8393x_ttda(s) + sizeof(uint16_t) * width,
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 0);
tx_len = 0;
/* Update registers */
- s->regs[SONIC_TCR] = dp8393x_get(s, width, data, 0) & 0xf000;
- s->regs[SONIC_TPS] = dp8393x_get(s, width, data, 1);
- s->regs[SONIC_TFC] = dp8393x_get(s, width, data, 2);
- s->regs[SONIC_TSA0] = dp8393x_get(s, width, data, 3);
- s->regs[SONIC_TSA1] = dp8393x_get(s, width, data, 4);
- s->regs[SONIC_TFS] = dp8393x_get(s, width, data, 5);
+ s->regs[SONIC_TCR] = dp8393x_get(s, width, 0) & 0xf000;
+ s->regs[SONIC_TPS] = dp8393x_get(s, width, 1);
+ s->regs[SONIC_TFC] = dp8393x_get(s, width, 2);
+ s->regs[SONIC_TSA0] = dp8393x_get(s, width, 3);
+ s->regs[SONIC_TSA1] = dp8393x_get(s, width, 4);
+ s->regs[SONIC_TFS] = dp8393x_get(s, width, 5);
/* Handle programmable interrupt */
if (s->regs[SONIC_TCR] & SONIC_TCR_PINT) {
@@ -465,10 +461,10 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
size = sizeof(uint16_t) * 3 * width;
address_space_rw(&s->as,
dp8393x_ttda(s) + sizeof(uint16_t) * (4 + 3 * i) * width,
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
- s->regs[SONIC_TSA0] = dp8393x_get(s, width, data, 0);
- s->regs[SONIC_TSA1] = dp8393x_get(s, width, data, 1);
- s->regs[SONIC_TFS] = dp8393x_get(s, width, data, 2);
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 0);
+ s->regs[SONIC_TSA0] = dp8393x_get(s, width, 0);
+ s->regs[SONIC_TSA1] = dp8393x_get(s, width, 1);
+ s->regs[SONIC_TFS] = dp8393x_get(s, width, 2);
}
}
@@ -495,12 +491,12 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
s->regs[SONIC_TCR] |= SONIC_TCR_PTX;
/* Write status */
- dp8393x_put(s, width, data, 0,
+ dp8393x_put(s, width, 0,
s->regs[SONIC_TCR] & 0x0fff); /* status */
size = sizeof(uint16_t) * width;
address_space_rw(&s->as,
dp8393x_ttda(s),
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 1);
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 1);
if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) {
/* Read footer of packet */
@@ -509,9 +505,9 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
dp8393x_ttda(s) +
sizeof(uint16_t) *
(4 + 3 * s->regs[SONIC_TFC]) * width,
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
- s->regs[SONIC_CTDA] = dp8393x_get(s, width, data, 0) & ~0x1;
- if (dp8393x_get(s, width, data, 0) & 0x1) {
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 0);
+ s->regs[SONIC_CTDA] = dp8393x_get(s, width, 0) & ~0x1;
+ if (dp8393x_get(s, width, 0) & 0x1) {
/* EOL detected */
break;
}
@@ -748,7 +744,6 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
size_t size)
{
dp8393xState *s = qemu_get_nic_opaque(nc);
- uint16_t data[10];
int packet_type;
uint32_t available, address;
int width, rx_len = size;
@@ -773,8 +768,8 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
size = sizeof(uint16_t) * 1 * width;
address = dp8393x_crda(s) + sizeof(uint16_t) * 5 * width;
address_space_rw(&s->as, address, MEMTXATTRS_UNSPECIFIED,
- (uint8_t *)data, size, 0);
- if (dp8393x_get(s, width, data, 0) & 0x1) {
+ (uint8_t *)s->data, size, 0);
+ if (dp8393x_get(s, width, 0) & 0x1) {
/* Still EOL ; stop reception */
return -1;
} else {
@@ -818,27 +813,27 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
/* Write status to memory */
DPRINTF("Write status at %08x\n", dp8393x_crda(s));
- dp8393x_put(s, width, data, 0, s->regs[SONIC_RCR]); /* status */
- dp8393x_put(s, width, data, 1, rx_len); /* byte count */
- dp8393x_put(s, width, data, 2, s->regs[SONIC_TRBA0]); /* pkt_ptr0 */
- dp8393x_put(s, width, data, 3, s->regs[SONIC_TRBA1]); /* pkt_ptr1 */
- dp8393x_put(s, width, data, 4, s->regs[SONIC_RSC]); /* seq_no */
+ dp8393x_put(s, width, 0, s->regs[SONIC_RCR]); /* status */
+ dp8393x_put(s, width, 1, rx_len); /* byte count */
+ dp8393x_put(s, width, 2, s->regs[SONIC_TRBA0]); /* pkt_ptr0 */
+ dp8393x_put(s, width, 3, s->regs[SONIC_TRBA1]); /* pkt_ptr1 */
+ dp8393x_put(s, width, 4, s->regs[SONIC_RSC]); /* seq_no */
size = sizeof(uint16_t) * 5 * width;
address_space_rw(&s->as, dp8393x_crda(s),
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 1);
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 1);
/* Move to next descriptor */
size = sizeof(uint16_t) * width;
address_space_rw(&s->as, dp8393x_crda(s) + sizeof(uint16_t) * 5 * width,
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
- s->regs[SONIC_LLFA] = dp8393x_get(s, width, data, 0);
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, size, 0);
+ s->regs[SONIC_LLFA] = dp8393x_get(s, width, 0);
if (s->regs[SONIC_LLFA] & 0x1) {
/* EOL detected */
s->regs[SONIC_ISR] |= SONIC_ISR_RDE;
} else {
- dp8393x_put(s, width, data, 0, 0); /* in_use */
+ dp8393x_put(s, width, 0, 0); /* in_use */
address_space_rw(&s->as, dp8393x_crda(s) + sizeof(uint16_t) * 6 *
width,
- MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, sizeof(uint16_t), 1);
+ MEMTXATTRS_UNSPECIFIED, (uint8_t *)s->data, sizeof(uint16_t), 1);
s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX;
s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) |
(((s->regs[SONIC_RSC] & 0x00ff) + 1) & 0x00ff);
--
2.21.0