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Message-Id: <20240325222902.220712-6-michael.chan@broadcom.com>
Date: Mon, 25 Mar 2024 15:28:55 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
pavan.chebbi@...adcom.com,
andrew.gospodarek@...adcom.com,
Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Subject: [PATCH net-next 05/12] bnxt_en: Introduce rss ctx structure, alloc/free functions
From: Pavan Chebbi <pavan.chebbi@...adcom.com>
Add struct bnxt_rss_ctx, related storage lists, required
defines, and its alloc/free functions.
Later patches will use them in order to support multiple
RSS contexts.
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 54 +++++++++++++++++++
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 24 +++++++++
.../net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 2 +
3 files changed, 80 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 3f5d7c81a281..0ede267904ad 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9925,6 +9925,53 @@ static int bnxt_alloc_rfs_vnics(struct bnxt *bp)
return rc;
}
+void bnxt_del_one_rss_ctx(struct bnxt *bp, struct bnxt_rss_ctx *rss_ctx,
+ bool all)
+{
+ if (!all)
+ return;
+
+ list_del(&rss_ctx->list);
+ bp->num_rss_ctx--;
+ clear_bit(rss_ctx->index, bp->rss_ctx_bmap);
+ kfree(rss_ctx);
+}
+
+struct bnxt_rss_ctx *bnxt_alloc_rss_ctx(struct bnxt *bp)
+{
+ struct bnxt_rss_ctx *rss_ctx = NULL;
+
+ rss_ctx = kzalloc(sizeof(*rss_ctx), GFP_KERNEL);
+ if (rss_ctx) {
+ rss_ctx->vnic.rss_ctx = rss_ctx;
+ list_add_tail(&rss_ctx->list, &bp->rss_ctx_list);
+ bp->num_rss_ctx++;
+ }
+ return rss_ctx;
+}
+
+void bnxt_clear_rss_ctxs(struct bnxt *bp, bool all)
+{
+ struct bnxt_rss_ctx *rss_ctx, *tmp;
+
+ list_for_each_entry_safe(rss_ctx, tmp, &bp->rss_ctx_list, list)
+ bnxt_del_one_rss_ctx(bp, rss_ctx, all);
+
+ if (all)
+ bitmap_free(bp->rss_ctx_bmap);
+}
+
+static void bnxt_init_multi_rss_ctx(struct bnxt *bp)
+{
+ bp->rss_ctx_bmap = bitmap_zalloc(BNXT_RSS_CTX_BMAP_LEN, GFP_KERNEL);
+ if (bp->rss_ctx_bmap) {
+ /* burn index 0 since we cannot have context 0 */
+ __set_bit(0, bp->rss_ctx_bmap);
+ INIT_LIST_HEAD(&bp->rss_ctx_list);
+ bp->rss_cap |= BNXT_RSS_CAP_MULTI_RSS_CTX;
+ }
+}
+
/* Allow PF, trusted VFs and VFs with default VLAN to be in promiscuous mode */
static bool bnxt_promisc_ok(struct bnxt *bp)
{
@@ -14612,6 +14659,8 @@ static void bnxt_remove_one(struct pci_dev *pdev)
unregister_netdev(dev);
bnxt_free_l2_filters(bp, true);
bnxt_free_ntp_fltrs(bp, true);
+ if (BNXT_SUPPORTS_MULTI_RSS_CTX(bp))
+ bnxt_clear_rss_ctxs(bp, true);
clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
/* Flush any pending tasks */
cancel_work_sync(&bp->sp_task);
@@ -15223,6 +15272,9 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
INIT_LIST_HEAD(&bp->usr_fltr_list);
+ if (BNXT_SUPPORTS_NTUPLE_VNIC(bp))
+ bnxt_init_multi_rss_ctx(bp);
+
rc = register_netdev(dev);
if (rc)
goto init_err_cleanup;
@@ -15243,6 +15295,8 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
bnxt_clear_int_mode(bp);
init_err_pci_clean:
+ if (BNXT_SUPPORTS_MULTI_RSS_CTX(bp))
+ bnxt_clear_rss_ctxs(bp, true);
bnxt_hwrm_func_drv_unrgtr(bp);
bnxt_free_hwrm_resources(bp);
bnxt_hwmon_uninit(bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 81460a96c0dd..4d3104c26cfa 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1256,9 +1256,21 @@ struct bnxt_vnic_info {
#define BNXT_VNIC_UCAST_FLAG 8
#define BNXT_VNIC_RFS_NEW_RSS_FLAG 0x10
#define BNXT_VNIC_NTUPLE_FLAG 0x20
+#define BNXT_VNIC_RSSCTX_FLAG 0x40
+ struct bnxt_rss_ctx *rss_ctx;
u32 vnic_id;
};
+struct bnxt_rss_ctx {
+ struct list_head list;
+ struct bnxt_vnic_info vnic;
+ u16 *rss_indir_tbl;
+ u8 index;
+};
+
+#define BNXT_MAX_ETH_RSS_CTX 32
+#define BNXT_RSS_CTX_BMAP_LEN (BNXT_MAX_ETH_RSS_CTX + 1)
+
struct bnxt_hw_rings {
int tx;
int rx;
@@ -2228,6 +2240,9 @@ struct bnxt {
/* grp_info indexed by completion ring index */
struct bnxt_ring_grp_info *grp_info;
struct bnxt_vnic_info *vnic_info;
+ struct list_head rss_ctx_list;
+ unsigned long *rss_ctx_bmap;
+ u32 num_rss_ctx;
int nr_vnics;
u16 *rss_indir_tbl;
u16 rss_indir_tbl_entries;
@@ -2242,6 +2257,7 @@ struct bnxt {
#define BNXT_RSS_CAP_AH_V6_RSS_CAP BIT(5)
#define BNXT_RSS_CAP_ESP_V4_RSS_CAP BIT(6)
#define BNXT_RSS_CAP_ESP_V6_RSS_CAP BIT(7)
+#define BNXT_RSS_CAP_MULTI_RSS_CTX BIT(8)
u8 rss_hash_key[HW_HASH_KEY_SIZE];
u8 rss_hash_key_valid:1;
@@ -2341,6 +2357,10 @@ struct bnxt {
#define BNXT_SUPPORTS_NTUPLE_VNIC(bp) \
(BNXT_PF(bp) && ((bp)->fw_cap & BNXT_FW_CAP_CFA_RFS_RING_TBL_IDX_V3))
+#define BNXT_SUPPORTS_MULTI_RSS_CTX(bp) \
+ (BNXT_PF(bp) && BNXT_SUPPORTS_NTUPLE_VNIC(bp) && \
+ ((bp)->rss_cap & BNXT_RSS_CAP_MULTI_RSS_CTX))
+
u32 hwrm_spec_code;
u16 hwrm_cmd_seq;
u16 hwrm_cmd_kong_seq;
@@ -2723,6 +2743,10 @@ int bnxt_hwrm_func_resc_qcaps(struct bnxt *bp, bool all);
int bnxt_hwrm_func_qcaps(struct bnxt *bp);
int bnxt_hwrm_fw_set_time(struct bnxt *);
int bnxt_hwrm_vnic_rss_cfg_p5(struct bnxt *bp, struct bnxt_vnic_info *vnic);
+void bnxt_del_one_rss_ctx(struct bnxt *bp, struct bnxt_rss_ctx *rss_ctx,
+ bool all);
+struct bnxt_rss_ctx *bnxt_alloc_rss_ctx(struct bnxt *bp);
+void bnxt_clear_rss_ctxs(struct bnxt *bp, bool all);
int bnxt_open_nic(struct bnxt *, bool, bool);
int bnxt_half_open_nic(struct bnxt *bp);
void bnxt_half_close_nic(struct bnxt *bp);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 1d240a27455a..771833b1900d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -969,6 +969,8 @@ static int bnxt_set_channels(struct net_device *dev,
}
bnxt_clear_usr_fltrs(bp, true);
+ if (BNXT_SUPPORTS_MULTI_RSS_CTX(bp))
+ bnxt_clear_rss_ctxs(bp, false);
if (netif_running(dev)) {
if (BNXT_PF(bp)) {
/* TODO CHIMP_FW: Send message to all VF's
--
2.30.1
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