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Message-Id: <20200709193756.37374-1-cforno12@linux.ibm.com>
Date: Thu, 9 Jul 2020 14:37:56 -0500
From: Cristobal Forno <cforno12@...ux.ibm.com>
To: netdev@...r.kernel.org
Cc: tlfalcon@...ux.ibm.com, Cristobal Forno <cforno12@...ux.ibm.com>
Subject: [PATCH, v2] ibmvnic: store RX and TX subCRQ handle array in ibmvnic_adapter struct
Currently the driver reads RX and TX subCRQ handle array directly from
a DMA-mapped buffer address when it needs to make a H_SEND_SUBCRQ
hcall. This patch stores that information in the ibmvnic_sub_crq_queue
structure instead of reading from the buffer received at login.
Signed-off-by: Cristobal Forno <cforno12@...ux.ibm.com>
---
drivers/net/ethernet/ibm/ibmvnic.c | 37 ++++++++++++++++++++----------
drivers/net/ethernet/ibm/ibmvnic.h | 1 +
2 files changed, 26 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 0fd7eae25fe9..2be1410b62cb 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -306,6 +306,7 @@ static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
struct ibmvnic_rx_pool *pool)
{
int count = pool->size - atomic_read(&pool->available);
+ u64 handle = adapter->rx_scrq[pool->index]->handle;
struct device *dev = &adapter->vdev->dev;
int buffers_added = 0;
unsigned long lpar_rc;
@@ -314,7 +315,6 @@ static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
unsigned int offset;
dma_addr_t dma_addr;
unsigned char *dst;
- u64 *handle_array;
int shift = 0;
int index;
int i;
@@ -322,10 +322,6 @@ static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
if (!pool->active)
return;
- handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
- be32_to_cpu(adapter->login_rsp_buf->
- off_rxadd_subcrqs));
-
for (i = 0; i < count; ++i) {
skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
if (!skb) {
@@ -369,8 +365,7 @@ static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
#endif
sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
- lpar_rc = send_subcrq(adapter, handle_array[pool->index],
- &sub_crq);
+ lpar_rc = send_subcrq(adapter, handle, &sub_crq);
if (lpar_rc != H_SUCCESS)
goto failure;
@@ -1524,9 +1519,9 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
unsigned int offset;
int num_entries = 1;
unsigned char *dst;
- u64 *handle_array;
int index = 0;
u8 proto = 0;
+ u64 handle;
netdev_tx_t ret = NETDEV_TX_OK;
if (test_bit(0, &adapter->resetting)) {
@@ -1553,8 +1548,7 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
tx_scrq = adapter->tx_scrq[queue_num];
txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
- handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
- be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
+ handle = tx_scrq->handle;
index = tx_pool->free_map[tx_pool->consumer_index];
@@ -1666,14 +1660,14 @@ static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
ret = NETDEV_TX_OK;
goto tx_err_out;
}
- lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
+ lpar_rc = send_subcrq_indirect(adapter, handle,
(u64)tx_buff->indir_dma,
(u64)num_entries);
dma_unmap_single(dev, tx_buff->indir_dma,
sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
} else {
tx_buff->num_entries = num_entries;
- lpar_rc = send_subcrq(adapter, handle_array[queue_num],
+ lpar_rc = send_subcrq(adapter, handle,
&tx_crq);
}
if (lpar_rc != H_SUCCESS) {
@@ -4292,6 +4286,10 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
struct net_device *netdev = adapter->netdev;
struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
struct ibmvnic_login_buffer *login = adapter->login_buf;
+ u64 *tx_handle_array;
+ u64 *rx_handle_array;
+ int num_tx_pools;
+ int num_rx_pools;
int i;
dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
@@ -4326,6 +4324,21 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
ibmvnic_remove(adapter->vdev);
return -EIO;
}
+
+ num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
+ num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+
+ tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+ be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
+ rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+ be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
+
+ for (i = 0; i < num_tx_pools; i++)
+ adapter->tx_scrq[i]->handle = tx_handle_array[i];
+
+ for (i = 0; i < num_rx_pools; i++)
+ adapter->rx_scrq[i]->handle = rx_handle_array[i];
+
release_login_buffer(adapter);
complete(&adapter->init_done);
diff --git a/drivers/net/ethernet/ibm/ibmvnic.h b/drivers/net/ethernet/ibm/ibmvnic.h
index f8416e1d4cf0..d99820212edd 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.h
+++ b/drivers/net/ethernet/ibm/ibmvnic.h
@@ -875,6 +875,7 @@ struct ibmvnic_sub_crq_queue {
struct ibmvnic_adapter *adapter;
atomic_t used;
char name[32];
+ u64 handle;
};
struct ibmvnic_long_term_buff {
--
2.27.0
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