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Subject[PATCH v2 04/17] staging: qlge: Deduplicate lbq_buf_size
Date
lbq_buf_size is duplicated to every rx_ring structure whereas lbq_buf_order
is present once in the ql_adapter structure. All rings use the same buf
size, keep only one copy of it. Also factor out the calculation of
lbq_buf_size instead of having two copies.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Acked-by: Willem de Bruijn <willemb@google.com>
---
drivers/staging/qlge/qlge.h | 2 +-
drivers/staging/qlge/qlge_dbg.c | 2 +-
drivers/staging/qlge/qlge_main.c | 61 ++++++++++++++------------------
3 files changed, 28 insertions(+), 37 deletions(-)

diff --git a/drivers/staging/qlge/qlge.h b/drivers/staging/qlge/qlge.h
index 0a156a95e981..ba61b4559dd6 100644
--- a/drivers/staging/qlge/qlge.h
+++ b/drivers/staging/qlge/qlge.h
@@ -1433,7 +1433,6 @@ struct rx_ring {
/* Large buffer queue elements. */
u32 lbq_len; /* entry count */
u32 lbq_size; /* size in bytes of queue */
- u32 lbq_buf_size;
void *lbq_base;
dma_addr_t lbq_base_dma;
void *lbq_base_indirect;
@@ -2108,6 +2107,7 @@ struct ql_adapter {
struct rx_ring rx_ring[MAX_RX_RINGS];
struct tx_ring tx_ring[MAX_TX_RINGS];
unsigned int lbq_buf_order;
+ u32 lbq_buf_size;

int rx_csum;
u32 default_rx_queue;
diff --git a/drivers/staging/qlge/qlge_dbg.c b/drivers/staging/qlge/qlge_dbg.c
index 31389ab8bdf7..46599d74c6fb 100644
--- a/drivers/staging/qlge/qlge_dbg.c
+++ b/drivers/staging/qlge/qlge_dbg.c
@@ -1630,6 +1630,7 @@ void ql_dump_qdev(struct ql_adapter *qdev)
DUMP_QDEV_FIELD(qdev, "0x%08x", xg_sem_mask);
DUMP_QDEV_FIELD(qdev, "0x%08x", port_link_up);
DUMP_QDEV_FIELD(qdev, "0x%08x", port_init);
+ DUMP_QDEV_FIELD(qdev, "%u", lbq_buf_size);
}
#endif

@@ -1774,7 +1775,6 @@ void ql_dump_rx_ring(struct rx_ring *rx_ring)
pr_err("rx_ring->lbq_curr_idx = %d\n", rx_ring->lbq_curr_idx);
pr_err("rx_ring->lbq_clean_idx = %d\n", rx_ring->lbq_clean_idx);
pr_err("rx_ring->lbq_free_cnt = %d\n", rx_ring->lbq_free_cnt);
- pr_err("rx_ring->lbq_buf_size = %d\n", rx_ring->lbq_buf_size);

pr_err("rx_ring->sbq_base = %p\n", rx_ring->sbq_base);
pr_err("rx_ring->sbq_base_dma = %llx\n",
diff --git a/drivers/staging/qlge/qlge_main.c b/drivers/staging/qlge/qlge_main.c
index a82920776e6b..2b1cc4b29bed 100644
--- a/drivers/staging/qlge/qlge_main.c
+++ b/drivers/staging/qlge/qlge_main.c
@@ -995,15 +995,14 @@ static struct bq_desc *ql_get_curr_lchunk(struct ql_adapter *qdev,
struct bq_desc *lbq_desc = ql_get_curr_lbuf(rx_ring);

pci_dma_sync_single_for_cpu(qdev->pdev,
- dma_unmap_addr(lbq_desc, mapaddr),
- rx_ring->lbq_buf_size,
- PCI_DMA_FROMDEVICE);
+ dma_unmap_addr(lbq_desc, mapaddr),
+ qdev->lbq_buf_size, PCI_DMA_FROMDEVICE);

/* If it's the last chunk of our master page then
* we unmap it.
*/
- if ((lbq_desc->p.pg_chunk.offset + rx_ring->lbq_buf_size)
- == ql_lbq_block_size(qdev))
+ if (lbq_desc->p.pg_chunk.offset + qdev->lbq_buf_size ==
+ ql_lbq_block_size(qdev))
pci_unmap_page(qdev->pdev,
lbq_desc->p.pg_chunk.map,
ql_lbq_block_size(qdev),
@@ -1074,11 +1073,11 @@ static int ql_get_next_chunk(struct ql_adapter *qdev, struct rx_ring *rx_ring,
/* Adjust the master page chunk for next
* buffer get.
*/
- rx_ring->pg_chunk.offset += rx_ring->lbq_buf_size;
+ rx_ring->pg_chunk.offset += qdev->lbq_buf_size;
if (rx_ring->pg_chunk.offset == ql_lbq_block_size(qdev)) {
rx_ring->pg_chunk.page = NULL;
} else {
- rx_ring->pg_chunk.va += rx_ring->lbq_buf_size;
+ rx_ring->pg_chunk.va += qdev->lbq_buf_size;
get_page(rx_ring->pg_chunk.page);
}
return 0;
@@ -1110,12 +1109,12 @@ static void ql_update_lbq(struct ql_adapter *qdev, struct rx_ring *rx_ring)
lbq_desc->p.pg_chunk.offset;
dma_unmap_addr_set(lbq_desc, mapaddr, map);
dma_unmap_len_set(lbq_desc, maplen,
- rx_ring->lbq_buf_size);
+ qdev->lbq_buf_size);
*lbq_desc->addr = cpu_to_le64(map);

pci_dma_sync_single_for_device(qdev->pdev, map,
- rx_ring->lbq_buf_size,
- PCI_DMA_FROMDEVICE);
+ qdev->lbq_buf_size,
+ PCI_DMA_FROMDEVICE);
clean_idx++;
if (clean_idx == rx_ring->lbq_len)
clean_idx = 0;
@@ -1880,8 +1879,7 @@ static struct sk_buff *ql_build_rx_skb(struct ql_adapter *qdev,
}
do {
lbq_desc = ql_get_curr_lchunk(qdev, rx_ring);
- size = (length < rx_ring->lbq_buf_size) ? length :
- rx_ring->lbq_buf_size;
+ size = min(length, qdev->lbq_buf_size);

netif_printk(qdev, rx_status, KERN_DEBUG, qdev->ndev,
"Adding page %d to skb for %d bytes.\n",
@@ -2776,12 +2774,12 @@ static int ql_alloc_tx_resources(struct ql_adapter *qdev,

static void ql_free_lbq_buffers(struct ql_adapter *qdev, struct rx_ring *rx_ring)
{
- unsigned int last_offset = ql_lbq_block_size(qdev) -
- rx_ring->lbq_buf_size;
+ unsigned int last_offset;
struct bq_desc *lbq_desc;

uint32_t curr_idx, clean_idx;

+ last_offset = ql_lbq_block_size(qdev) - qdev->lbq_buf_size;
curr_idx = rx_ring->lbq_curr_idx;
clean_idx = rx_ring->lbq_clean_idx;
while (curr_idx != clean_idx) {
@@ -3149,8 +3147,8 @@ static int ql_start_rx_ring(struct ql_adapter *qdev, struct rx_ring *rx_ring)
} while (page_entries < MAX_DB_PAGES_PER_BQ(rx_ring->lbq_len));
cqicb->lbq_addr =
cpu_to_le64(rx_ring->lbq_base_indirect_dma);
- bq_len = (rx_ring->lbq_buf_size == 65536) ? 0 :
- (u16) rx_ring->lbq_buf_size;
+ bq_len = (qdev->lbq_buf_size == 65536) ? 0 :
+ (u16)qdev->lbq_buf_size;
cqicb->lbq_buf_size = cpu_to_le16(bq_len);
bq_len = (rx_ring->lbq_len == 65536) ? 0 :
(u16) rx_ring->lbq_len;
@@ -4059,16 +4057,21 @@ static int qlge_close(struct net_device *ndev)
return 0;
}

+static void qlge_set_lb_size(struct ql_adapter *qdev)
+{
+ if (qdev->ndev->mtu <= 1500)
+ qdev->lbq_buf_size = LARGE_BUFFER_MIN_SIZE;
+ else
+ qdev->lbq_buf_size = LARGE_BUFFER_MAX_SIZE;
+ qdev->lbq_buf_order = get_order(qdev->lbq_buf_size);
+}
+
static int ql_configure_rings(struct ql_adapter *qdev)
{
int i;
struct rx_ring *rx_ring;
struct tx_ring *tx_ring;
int cpu_cnt = min(MAX_CPUS, (int)num_online_cpus());
- unsigned int lbq_buf_len = (qdev->ndev->mtu > 1500) ?
- LARGE_BUFFER_MAX_SIZE : LARGE_BUFFER_MIN_SIZE;
-
- qdev->lbq_buf_order = get_order(lbq_buf_len);

/* In a perfect world we have one RSS ring for each CPU
* and each has it's own vector. To do that we ask for
@@ -4116,7 +4119,6 @@ static int ql_configure_rings(struct ql_adapter *qdev)
rx_ring->lbq_len = NUM_LARGE_BUFFERS;
rx_ring->lbq_size =
rx_ring->lbq_len * sizeof(__le64);
- rx_ring->lbq_buf_size = (u16)lbq_buf_len;
rx_ring->sbq_len = NUM_SMALL_BUFFERS;
rx_ring->sbq_size =
rx_ring->sbq_len * sizeof(__le64);
@@ -4132,7 +4134,6 @@ static int ql_configure_rings(struct ql_adapter *qdev)
rx_ring->cq_len * sizeof(struct ql_net_rsp_iocb);
rx_ring->lbq_len = 0;
rx_ring->lbq_size = 0;
- rx_ring->lbq_buf_size = 0;
rx_ring->sbq_len = 0;
rx_ring->sbq_size = 0;
rx_ring->sbq_buf_size = 0;
@@ -4151,6 +4152,7 @@ static int qlge_open(struct net_device *ndev)
if (err)
return err;

+ qlge_set_lb_size(qdev);
err = ql_configure_rings(qdev);
if (err)
return err;
@@ -4172,9 +4174,7 @@ static int qlge_open(struct net_device *ndev)

static int ql_change_rx_buffers(struct ql_adapter *qdev)
{
- struct rx_ring *rx_ring;
- int i, status;
- u32 lbq_buf_len;
+ int status;

/* Wait for an outstanding reset to complete. */
if (!test_bit(QL_ADAPTER_UP, &qdev->flags)) {
@@ -4197,16 +4197,7 @@ static int ql_change_rx_buffers(struct ql_adapter *qdev)
if (status)
goto error;

- /* Get the new rx buffer size. */
- lbq_buf_len = (qdev->ndev->mtu > 1500) ?
- LARGE_BUFFER_MAX_SIZE : LARGE_BUFFER_MIN_SIZE;
- qdev->lbq_buf_order = get_order(lbq_buf_len);
-
- for (i = 0; i < qdev->rss_ring_count; i++) {
- rx_ring = &qdev->rx_ring[i];
- /* Set the new size. */
- rx_ring->lbq_buf_size = lbq_buf_len;
- }
+ qlge_set_lb_size(qdev);

status = ql_adapter_up(qdev);
if (status)
--
2.23.0
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