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Merge branch 'ps3_gelic_net-fixes' 

Geoff Levand says:

====================
net/ps3_gelic_net: DMA related fixes

v9: Make rx_skb_size local to gelic_descr_prepare_rx.
v8: Add more cpu_to_be32 calls.
v7: Remove all cleanups, sync to spider net.
v6: Reworked and cleaned up patches.
v5: Some additional patch cleanups.
v4: More patch cleanups.
v3: Cleaned up patches as requested.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2023-03-20 10:20:40 +00:00
parent 7d722c9802 bebe933d35
commit f36fa5581b
2 changed files with 26 additions and 22 deletions
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43
drivers/net/ethernet/toshiba/ps3_gelic_net.c
View File

@ -317,15 +317,17 @@ static int gelic_card_init_chain(struct gelic_card *card,
/* set up the hardware pointers in each descriptor */
for (i = 0; i < no; i++, descr++) {
gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
descr->bus_addr =
dma_map_single(ctodev(card), descr,
GELIC_DESCR_SIZE,
DMA_BIDIRECTIONAL);
dma_addr_t cpu_addr;
if (!descr->bus_addr)
gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
cpu_addr = dma_map_single(ctodev(card), descr,
GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
if (dma_mapping_error(ctodev(card), cpu_addr))
goto iommu_error;
descr->bus_addr = cpu_to_be32(cpu_addr);
descr->next = descr + 1;
descr->prev = descr - 1;
}
@ -365,26 +367,28 @@ iommu_error:
*
* allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
* Activate the descriptor state-wise
*
* Gelic RX sk_buffs must be aligned to GELIC_NET_RXBUF_ALIGN and the length
* must be a multiple of GELIC_NET_RXBUF_ALIGN.
*/
static int gelic_descr_prepare_rx(struct gelic_card *card,
struct gelic_descr *descr)
{
static const unsigned int rx_skb_size =
ALIGN(GELIC_NET_MAX_FRAME, GELIC_NET_RXBUF_ALIGN) +
GELIC_NET_RXBUF_ALIGN - 1;
dma_addr_t cpu_addr;
int offset;
unsigned int bufsize;
if (gelic_descr_get_status(descr) != GELIC_DESCR_DMA_NOT_IN_USE)
dev_info(ctodev(card), "%s: ERROR status\n", __func__);
/* we need to round up the buffer size to a multiple of 128 */
bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
/* and we need to have it 128 byte aligned, therefore we allocate a
* bit more */
descr->skb = dev_alloc_skb(bufsize + GELIC_NET_RXBUF_ALIGN - 1);
descr->skb = netdev_alloc_skb(*card->netdev, rx_skb_size);
if (!descr->skb) {
descr->buf_addr = 0; /* tell DMAC don't touch memory */
return -ENOMEM;
}
descr->buf_size = cpu_to_be32(bufsize);
descr->buf_size = cpu_to_be32(rx_skb_size);
descr->dmac_cmd_status = 0;
descr->result_size = 0;
descr->valid_size = 0;
@ -395,11 +399,10 @@ static int gelic_descr_prepare_rx(struct gelic_card *card,
if (offset)
skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
/* io-mmu-map the skb */
descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card),
descr->skb->data,
GELIC_NET_MAX_MTU,
DMA_FROM_DEVICE));
if (!descr->buf_addr) {
cpu_addr = dma_map_single(ctodev(card), descr->skb->data,
GELIC_NET_MAX_FRAME, DMA_FROM_DEVICE);
descr->buf_addr = cpu_to_be32(cpu_addr);
if (dma_mapping_error(ctodev(card), cpu_addr)) {
dev_kfree_skb_any(descr->skb);
descr->skb = NULL;
dev_info(ctodev(card),
@ -779,7 +782,7 @@ static int gelic_descr_prepare_tx(struct gelic_card *card,
buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
if (!buf) {
if (dma_mapping_error(ctodev(card), buf)) {
dev_err(ctodev(card),
"dma map 2 failed (%p, %i). Dropping packet\n",
skb->data, skb->len);
@ -915,7 +918,7 @@ static void gelic_net_pass_skb_up(struct gelic_descr *descr,
data_error = be32_to_cpu(descr->data_error);
/* unmap skb buffer */
dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
GELIC_NET_MAX_MTU,
GELIC_NET_MAX_FRAME,
DMA_FROM_DEVICE);
skb_put(skb, be32_to_cpu(descr->valid_size)?

5
drivers/net/ethernet/toshiba/ps3_gelic_net.h
View File

@ -19,8 +19,9 @@
#define GELIC_NET_RX_DESCRIPTORS 128 /* num of descriptors */
#define GELIC_NET_TX_DESCRIPTORS 128 /* num of descriptors */
#define GELIC_NET_MAX_MTU VLAN_ETH_FRAME_LEN
#define GELIC_NET_MIN_MTU VLAN_ETH_ZLEN
#define GELIC_NET_MAX_FRAME 2312
#define GELIC_NET_MAX_MTU 2294
#define GELIC_NET_MIN_MTU 64
#define GELIC_NET_RXBUF_ALIGN 128
#define GELIC_CARD_RX_CSUM_DEFAULT 1 /* hw chksum */
#define GELIC_NET_WATCHDOG_TIMEOUT 5*HZ