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[NOTFORMERGE PATCH v3 7/8] dp8393x: Rewrite dp8393x_get() / dp8393x_put(
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From: |
Philippe Mathieu-Daudé |
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Subject: |
[NOTFORMERGE PATCH v3 7/8] dp8393x: Rewrite dp8393x_get() / dp8393x_put() |
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Date: |
Sat, 10 Jul 2021 19:49:53 +0200 |
Instead of accessing N registers via a single address_space API
call using a temporary buffer (stored in the device state) and
updating each register, move the address_space call in the
register put/get. The load/store and word size checks are moved
to put/get too. This simplifies a bit, making the code easier
to read.
Co-developed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Co-developed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
Missing:
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
hw/net/dp8393x.c | 160 +++++++++++++++++++----------------------------
1 file changed, 63 insertions(+), 97 deletions(-)
diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c
index ac93412f70b..a9224a5bc88 100644
--- a/hw/net/dp8393x.c
+++ b/hw/net/dp8393x.c
@@ -163,7 +163,6 @@ struct dp8393xState {
/* Temporaries */
uint8_t tx_buffer[0x10000];
- uint16_t data[12];
int loopback_packet;
/* Memory access */
@@ -220,34 +219,48 @@ 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, int offset)
+static uint16_t dp8393x_get(dp8393xState *s, hwaddr addr, int offset)
{
+ const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
uint16_t val;
- if (s->big_endian) {
- val = be16_to_cpu(s->data[offset * width + width - 1]);
+ if (s->regs[SONIC_DCR] & SONIC_DCR_DW) {
+ addr += offset << 2;
+ if (s->big_endian) {
+ val = address_space_ldl_be(&s->as, addr, attrs, NULL);
+ } else {
+ val = address_space_ldl_le(&s->as, addr, attrs, NULL);
+ }
} else {
- val = le16_to_cpu(s->data[offset * width]);
+ addr += offset << 1;
+ if (s->big_endian) {
+ val = address_space_lduw_be(&s->as, addr, attrs, NULL);
+ } else {
+ val = address_space_lduw_le(&s->as, addr, attrs, NULL);
+ }
}
+
return val;
}
-static void dp8393x_put(dp8393xState *s, int width, int offset,
- uint16_t val)
+static void dp8393x_put(dp8393xState *s,
+ hwaddr addr, int offset, uint16_t val)
{
- if (s->big_endian) {
- if (width == 2) {
- s->data[offset * 2] = 0;
- s->data[offset * 2 + 1] = cpu_to_be16(val);
+ const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
+
+ if (s->regs[SONIC_DCR] & SONIC_DCR_DW) {
+ addr += offset << 2;
+ if (s->big_endian) {
+ address_space_stl_be(&s->as, addr, val, attrs, NULL);
} else {
- s->data[offset] = cpu_to_be16(val);
+ address_space_stl_le(&s->as, addr, val, attrs, NULL);
}
} else {
- if (width == 2) {
- s->data[offset * 2] = cpu_to_le16(val);
- s->data[offset * 2 + 1] = 0;
+ addr += offset << 1;
+ if (s->big_endian) {
+ address_space_stw_be(&s->as, addr, val, attrs, NULL);
} else {
- s->data[offset] = cpu_to_le16(val);
+ address_space_stw_le(&s->as, addr, val, attrs, NULL);
}
}
}
@@ -278,12 +291,10 @@ static void dp8393x_do_load_cam(dp8393xState *s)
while (s->regs[SONIC_CDC] & 0x1f) {
/* Fill current entry */
- address_space_read(&s->as, dp8393x_cdp(s),
- MEMTXATTRS_UNSPECIFIED, s->data, size);
- index = dp8393x_get(s, width, 0) & 0xf;
- s->cam[index][0] = dp8393x_get(s, width, 1);
- s->cam[index][1] = dp8393x_get(s, width, 2);
- s->cam[index][2] = dp8393x_get(s, width, 3);
+ index = dp8393x_get(s, dp8393x_cdp(s), 0) & 0xf;
+ s->cam[index][0] = dp8393x_get(s, dp8393x_cdp(s), 1);
+ s->cam[index][1] = dp8393x_get(s, dp8393x_cdp(s), 2);
+ s->cam[index][2] = dp8393x_get(s, dp8393x_cdp(s), 3);
trace_dp8393x_load_cam(index,
s->cam[index][0] >> 8, s->cam[index][0] & 0xff,
s->cam[index][1] >> 8, s->cam[index][1] & 0xff,
@@ -294,9 +305,7 @@ static void dp8393x_do_load_cam(dp8393xState *s)
}
/* Read CAM enable */
- address_space_read(&s->as, dp8393x_cdp(s),
- MEMTXATTRS_UNSPECIFIED, s->data, size);
- s->regs[SONIC_CE] = dp8393x_get(s, width, 0);
+ s->regs[SONIC_CE] = dp8393x_get(s, dp8393x_cdp(s), 0);
trace_dp8393x_load_cam_done(s->regs[SONIC_CE]);
/* Done */
@@ -312,14 +321,12 @@ static void dp8393x_do_read_rra(dp8393xState *s)
/* Read memory */
width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1;
size = sizeof(uint16_t) * 4 * width;
- address_space_read(&s->as, dp8393x_rrp(s),
- MEMTXATTRS_UNSPECIFIED, s->data, size);
/* Update SONIC registers */
- 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);
+ s->regs[SONIC_CRBA0] = dp8393x_get(s, dp8393x_rrp(s), 0);
+ s->regs[SONIC_CRBA1] = dp8393x_get(s, dp8393x_rrp(s), 1);
+ s->regs[SONIC_RBWC0] = dp8393x_get(s, dp8393x_rrp(s), 2);
+ s->regs[SONIC_RBWC1] = dp8393x_get(s, dp8393x_rrp(s), 3);
trace_dp8393x_read_rra_regs(s->regs[SONIC_CRBA0], s->regs[SONIC_CRBA1],
s->regs[SONIC_RBWC0], s->regs[SONIC_RBWC1]);
@@ -415,28 +422,22 @@ static void dp8393x_do_receiver_disable(dp8393xState *s)
static void dp8393x_do_transmit_packets(dp8393xState *s)
{
NetClientState *nc = qemu_get_queue(s->nic);
- int width, size;
int tx_len, len;
uint16_t i;
- width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1;
-
while (1) {
/* Read memory */
- size = sizeof(uint16_t) * 6 * width;
s->regs[SONIC_TTDA] = s->regs[SONIC_CTDA];
trace_dp8393x_transmit_packet(dp8393x_ttda(s));
- address_space_read(&s->as, dp8393x_ttda(s) + sizeof(uint16_t) * width,
- MEMTXATTRS_UNSPECIFIED, s->data, size);
tx_len = 0;
/* Update registers */
- 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);
+ s->regs[SONIC_TCR] = dp8393x_get(s, dp8393x_ttda(s), 1) & 0xf000;
+ s->regs[SONIC_TPS] = dp8393x_get(s, dp8393x_ttda(s), 2);
+ s->regs[SONIC_TFC] = dp8393x_get(s, dp8393x_ttda(s), 3);
+ s->regs[SONIC_TSA0] = dp8393x_get(s, dp8393x_ttda(s), 4);
+ s->regs[SONIC_TSA1] = dp8393x_get(s, dp8393x_ttda(s), 5);
+ s->regs[SONIC_TFS] = dp8393x_get(s, dp8393x_ttda(s), 6);
/* Handle programmable interrupt */
if (s->regs[SONIC_TCR] & SONIC_TCR_PINT) {
@@ -458,15 +459,12 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
i++;
if (i != s->regs[SONIC_TFC]) {
/* Read next fragment details */
- size = sizeof(uint16_t) * 3 * width;
- address_space_read(&s->as,
- dp8393x_ttda(s)
- + sizeof(uint16_t) * width * (4 + 3 * i),
- MEMTXATTRS_UNSPECIFIED, s->data,
- size);
- 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);
+ s->regs[SONIC_TSA0] = dp8393x_get(s, dp8393x_ttda(s),
+ 4 + 3 * i);
+ s->regs[SONIC_TSA1] = dp8393x_get(s, dp8393x_ttda(s),
+ 5 + 3 * i);
+ s->regs[SONIC_TFS] = dp8393x_get(s, dp8393x_ttda(s),
+ 6 + 3 * i);
}
}
@@ -499,22 +497,12 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
s->regs[SONIC_TCR] |= SONIC_TCR_PTX;
/* Write status */
- dp8393x_put(s, width, 0,
- s->regs[SONIC_TCR] & 0x0fff); /* status */
- size = sizeof(uint16_t) * width;
- address_space_write(&s->as, dp8393x_ttda(s),
- MEMTXATTRS_UNSPECIFIED, s->data, size);
+ dp8393x_put(s, dp8393x_ttda(s), 0, s->regs[SONIC_TCR] & 0x0fff);
if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) {
/* Read footer of packet */
- size = sizeof(uint16_t) * width;
- address_space_read(&s->as,
- dp8393x_ttda(s)
- + sizeof(uint16_t) * width
- * (4 + 3 * s->regs[SONIC_TFC]),
- MEMTXATTRS_UNSPECIFIED, s->data,
- size);
- s->regs[SONIC_CTDA] = dp8393x_get(s, width, 0);
+ s->regs[SONIC_CTDA] = dp8393x_get(s, dp8393x_ttda(s),
+ 4 + 3 * s->regs[SONIC_TFC]);
if (s->regs[SONIC_CTDA] & SONIC_DESC_EOL) {
/* EOL detected */
break;
@@ -762,7 +750,7 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
dp8393xState *s = qemu_get_nic_opaque(nc);
int packet_type;
uint32_t available, address;
- int width, rx_len, padded_len;
+ int rx_len, padded_len;
uint32_t checksum;
int size;
@@ -775,10 +763,8 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
rx_len = pkt_size + sizeof(checksum);
if (s->regs[SONIC_DCR] & SONIC_DCR_DW) {
- width = 2;
padded_len = ((rx_len - 1) | 3) + 1;
} else {
- width = 1;
padded_len = ((rx_len - 1) | 1) + 1;
}
@@ -799,11 +785,7 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
/* Check for EOL */
if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) {
/* Are we still in resource exhaustion? */
- size = sizeof(uint16_t) * 1 * width;
- address = dp8393x_crda(s) + sizeof(uint16_t) * 5 * width;
- address_space_read(&s->as, address, MEMTXATTRS_UNSPECIFIED,
- s->data, size);
- s->regs[SONIC_LLFA] = dp8393x_get(s, width, 0);
+ s->regs[SONIC_LLFA] = dp8393x_get(s, dp8393x_crda(s), 5);
if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) {
/* Still EOL ; stop reception */
return -1;
@@ -811,11 +793,7 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
/* Link has been updated by host */
/* Clear in_use */
- size = sizeof(uint16_t) * width;
- address = dp8393x_crda(s) + sizeof(uint16_t) * 6 * width;
- dp8393x_put(s, width, 0, 0);
- address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED,
- s->data, size);
+ dp8393x_put(s, dp8393x_crda(s), 6, 0x0000);
/* Move to next descriptor */
s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
@@ -874,32 +852,20 @@ static ssize_t dp8393x_receive(NetClientState *nc, const
uint8_t * buf,
/* Write status to memory */
trace_dp8393x_receive_write_status(dp8393x_crda(s));
- 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_write(&s->as, dp8393x_crda(s),
- MEMTXATTRS_UNSPECIFIED,
- s->data, size);
+ dp8393x_put(s, dp8393x_crda(s), 0, s->regs[SONIC_RCR]); /* status */
+ dp8393x_put(s, dp8393x_crda(s), 1, rx_len); /* byte count */
+ dp8393x_put(s, dp8393x_crda(s), 2, s->regs[SONIC_TRBA0]); /* pkt_ptr0 */
+ dp8393x_put(s, dp8393x_crda(s), 3, s->regs[SONIC_TRBA1]); /* pkt_ptr1 */
+ dp8393x_put(s, dp8393x_crda(s), 4, s->regs[SONIC_RSC]); /* seq_no */
/* Check link field */
- size = sizeof(uint16_t) * width;
- address_space_read(&s->as,
- dp8393x_crda(s) + sizeof(uint16_t) * 5 * width,
- MEMTXATTRS_UNSPECIFIED, s->data, size);
- s->regs[SONIC_LLFA] = dp8393x_get(s, width, 0);
+ s->regs[SONIC_LLFA] = dp8393x_get(s, dp8393x_crda(s), 5);
if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) {
/* EOL detected */
s->regs[SONIC_ISR] |= SONIC_ISR_RDE;
} else {
/* Clear in_use */
- size = sizeof(uint16_t) * width;
- address = dp8393x_crda(s) + sizeof(uint16_t) * 6 * width;
- dp8393x_put(s, width, 0, 0);
- address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED,
- s->data, size);
+ dp8393x_put(s, dp8393x_crda(s), 6, 0x0000);
/* Move to next descriptor */
s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
--
2.31.1
- Re: [PATCH v3 3/8] dp8393x: Only shift the device registers mapping by 1 bit, (continued)
- [PATCH v3 2/8] dp8393x: Replace 0x40 magic value by SONIC_REG16_COUNT definition, Philippe Mathieu-Daudé, 2021/07/10
- [PATCH v3 4/8] dp8393x: Store CAM registers as 16-bit, Philippe Mathieu-Daudé, 2021/07/10
- [PATCH v3 5/8] dp8393x: Migrate registers as array of uint16, Philippe Mathieu-Daudé, 2021/07/10
- [PATCH v3 6/8] dp8393x: Store CRC using device configured endianess, Philippe Mathieu-Daudé, 2021/07/10
- [NOTFORMERGE PATCH v3 7/8] dp8393x: Rewrite dp8393x_get() / dp8393x_put(),
Philippe Mathieu-Daudé <=
- [NOTFORMERGE PATCH v3 8/8] dp8393x: don't force 32-bit register access, Philippe Mathieu-Daudé, 2021/07/10
- Re: [PATCH v3 0/8] dp8393x: fixes and improvements, Finn Thain, 2021/07/10