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bng_en: Introduce VNIC

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Add the VNIC-specific structures and DMA memory necessary to support
UC/MC and RSS functionality.

Signed-off-by: Bhargava Marreddy <bhargava.marreddy@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Rajashekar Hudumula <rajashekar.hudumula@broadcom.com>
Link: https://patch.msgid.link/20250919174742.24969-5-bhargava.marreddy@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Bhargava Marreddy 2025-09-19 23:17:35 +05:30 committed by Jakub Kicinski
parent bd06d72972
commit 490e145c3a
2 changed files with 151 additions and 0 deletions
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121
drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
View File

@ -439,12 +439,122 @@ static int bnge_alloc_tx_rings(struct bnge_net *bn)
return rc;
}
static void bnge_free_vnic_attributes(struct bnge_net *bn)
{
struct pci_dev *pdev = bn->bd->pdev;
struct bnge_vnic_info *vnic;
int i;
if (!bn->vnic_info)
return;
for (i = 0; i < bn->nr_vnics; i++) {
vnic = &bn->vnic_info[i];
kfree(vnic->uc_list);
vnic->uc_list = NULL;
if (vnic->mc_list) {
dma_free_coherent(&pdev->dev, vnic->mc_list_size,
vnic->mc_list, vnic->mc_list_mapping);
vnic->mc_list = NULL;
}
if (vnic->rss_table) {
dma_free_coherent(&pdev->dev, vnic->rss_table_size,
vnic->rss_table,
vnic->rss_table_dma_addr);
vnic->rss_table = NULL;
}
vnic->rss_hash_key = NULL;
vnic->flags = 0;
}
}
static int bnge_alloc_vnic_attributes(struct bnge_net *bn)
{
struct bnge_dev *bd = bn->bd;
struct bnge_vnic_info *vnic;
int i, size;
for (i = 0; i < bn->nr_vnics; i++) {
vnic = &bn->vnic_info[i];
if (vnic->flags & BNGE_VNIC_UCAST_FLAG) {
int mem_size = (BNGE_MAX_UC_ADDRS - 1) * ETH_ALEN;
vnic->uc_list = kmalloc(mem_size, GFP_KERNEL);
if (!vnic->uc_list)
goto err_free_vnic_attributes;
}
if (vnic->flags & BNGE_VNIC_MCAST_FLAG) {
vnic->mc_list_size = BNGE_MAX_MC_ADDRS * ETH_ALEN;
vnic->mc_list =
dma_alloc_coherent(bd->dev,
vnic->mc_list_size,
&vnic->mc_list_mapping,
GFP_KERNEL);
if (!vnic->mc_list)
goto err_free_vnic_attributes;
}
/* Allocate rss table and hash key */
size = L1_CACHE_ALIGN(BNGE_MAX_RSS_TABLE_SIZE);
vnic->rss_table_size = size + HW_HASH_KEY_SIZE;
vnic->rss_table = dma_alloc_coherent(bd->dev,
vnic->rss_table_size,
&vnic->rss_table_dma_addr,
GFP_KERNEL);
if (!vnic->rss_table)
goto err_free_vnic_attributes;
vnic->rss_hash_key = ((void *)vnic->rss_table) + size;
vnic->rss_hash_key_dma_addr = vnic->rss_table_dma_addr + size;
}
return 0;
err_free_vnic_attributes:
bnge_free_vnic_attributes(bn);
return -ENOMEM;
}
static int bnge_alloc_vnics(struct bnge_net *bn)
{
int num_vnics;
/* Allocate only 1 VNIC for now
* Additional VNICs will be added based on RFS/NTUPLE in future patches
*/
num_vnics = 1;
bn->vnic_info = kcalloc(num_vnics, sizeof(struct bnge_vnic_info),
GFP_KERNEL);
if (!bn->vnic_info)
return -ENOMEM;
bn->nr_vnics = num_vnics;
return 0;
}
static void bnge_free_vnics(struct bnge_net *bn)
{
kfree(bn->vnic_info);
bn->vnic_info = NULL;
bn->nr_vnics = 0;
}
static void bnge_free_core(struct bnge_net *bn)
{
bnge_free_vnic_attributes(bn);
bnge_free_tx_rings(bn);
bnge_free_rx_rings(bn);
bnge_free_nq_tree(bn);
bnge_free_nq_arrays(bn);
bnge_free_vnics(bn);
kfree(bn->tx_ring_map);
bn->tx_ring_map = NULL;
kfree(bn->tx_ring);
@ -531,6 +641,10 @@ static int bnge_alloc_core(struct bnge_net *bn)
txr->bnapi = bnapi2;
}
rc = bnge_alloc_vnics(bn);
if (rc)
goto err_free_core;
rc = bnge_alloc_nq_arrays(bn);
if (rc)
goto err_free_core;
@ -546,6 +660,13 @@ static int bnge_alloc_core(struct bnge_net *bn)
goto err_free_core;
rc = bnge_alloc_nq_tree(bn);
if (rc)
goto err_free_core;
bn->vnic_info[BNGE_VNIC_DEFAULT].flags |= BNGE_VNIC_RSS_FLAG |
BNGE_VNIC_MCAST_FLAG |
BNGE_VNIC_UCAST_FLAG;
rc = bnge_alloc_vnic_attributes(bn);
if (rc)
goto err_free_core;
return 0;

30
drivers/net/ethernet/broadcom/bnge/bnge_netdev.h
View File

@ -176,6 +176,8 @@ struct bnge_net {
u16 *tx_ring_map;
enum dma_data_direction rx_dir;
struct bnge_vnic_info *vnic_info;
int nr_vnics;
int total_irqs;
};
@ -300,4 +302,32 @@ struct bnge_napi {
struct bnge_tx_ring_info *tx_ring[BNGE_MAX_TXR_PER_NAPI];
};
#define INVALID_STATS_CTX_ID -1
#define BNGE_VNIC_DEFAULT 0
#define BNGE_MAX_UC_ADDRS 4
struct bnge_vnic_info {
u8 *uc_list;
dma_addr_t rss_table_dma_addr;
__le16 *rss_table;
dma_addr_t rss_hash_key_dma_addr;
u64 *rss_hash_key;
int rss_table_size;
#define BNGE_RSS_TABLE_ENTRIES 64
#define BNGE_RSS_TABLE_SIZE (BNGE_RSS_TABLE_ENTRIES * 4)
#define BNGE_RSS_TABLE_MAX_TBL 8
#define BNGE_MAX_RSS_TABLE_SIZE \
(BNGE_RSS_TABLE_SIZE * BNGE_RSS_TABLE_MAX_TBL)
u8 *mc_list;
int mc_list_size;
int mc_list_count;
dma_addr_t mc_list_mapping;
#define BNGE_MAX_MC_ADDRS 16
u32 flags;
#define BNGE_VNIC_RSS_FLAG 1
#define BNGE_VNIC_MCAST_FLAG 4
#define BNGE_VNIC_UCAST_FLAG 8
};
#endif /* _BNGE_NETDEV_H_ */