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Date: Wed, 13 Jan 2021 20:50:07 +0530
From: Srujana Challa <schalla@...vell.com>
To: <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <kuba@...nel.org>,
<sgoutham@...vell.com>, <gakula@...vell.com>,
<sbhatta@...vell.com>, <schandran@...vell.com>,
<pathreya@...vell.com>, <jerinj@...vell.com>,
Srujana Challa <schalla@...vell.com>
Subject: [PATCH net-next,3/3] octeontx2-af: Handle CPT function level reset
When FLR is initiated for a VF (PCI function level reset),
the parent PF gets a interrupt. PF then sends a message to
admin function (AF), which then cleans up all resources
attached to that VF. This patch adds support to handle
CPT FLR.
Signed-off-by: Narayana Prasad Raju Atherya <pathreya@...vell.com>
Signed-off-by: Suheil Chandran <schandran@...vell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@...vell.com>
Signed-off-by: Srujana Challa <schalla@...vell.com>
---
.../net/ethernet/marvell/octeontx2/af/rvu.c | 3 +
.../net/ethernet/marvell/octeontx2/af/rvu.h | 2 +
.../ethernet/marvell/octeontx2/af/rvu_cpt.c | 74 +++++++++++++++++++
.../ethernet/marvell/octeontx2/af/rvu_reg.h | 8 ++
4 files changed, 87 insertions(+)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index e8fd712860a1..0d538b39462d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -2150,6 +2150,9 @@ static void rvu_blklf_teardown(struct rvu *rvu, u16 pcifunc, u8 blkaddr)
rvu_nix_lf_teardown(rvu, pcifunc, block->addr, lf);
else if (block->addr == BLKADDR_NPA)
rvu_npa_lf_teardown(rvu, pcifunc, lf);
+ else if ((block->addr == BLKADDR_CPT0) ||
+ (block->addr == BLKADDR_CPT1))
+ rvu_cpt_lf_teardown(rvu, pcifunc, lf, slot);
err = rvu_lf_reset(rvu, block, lf);
if (err) {
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index b1a6ecfd563e..6f64a13e752a 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -601,6 +601,8 @@ void npc_enable_mcam_entry(struct rvu *rvu, struct npc_mcam *mcam,
void npc_read_mcam_entry(struct rvu *rvu, struct npc_mcam *mcam,
int blkaddr, u16 src, struct mcam_entry *entry,
u8 *intf, u8 *ena);
+/* CPT APIs */
+int rvu_cpt_lf_teardown(struct rvu *rvu, u16 pcifunc, int lf, int slot);
#ifdef CONFIG_DEBUG_FS
void rvu_dbg_init(struct rvu *rvu);
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
index b6de4b95a72a..ea435d7da975 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
@@ -240,3 +240,77 @@ int rvu_mbox_handler_cpt_rd_wr_register(struct rvu *rvu,
return 0;
}
+
+static void cpt_lf_disable_iqueue(struct rvu *rvu, int blkaddr, int slot)
+{
+ u64 inprog, grp_ptr;
+ int i = 0;
+
+ /* Disable instructions enqueuing */
+ rvu_write64(rvu, blkaddr, CPT_AF_BAR2_ALIASX(slot, CPT_LF_CTL), 0x0);
+
+ /* Disable executions in the LF's queue */
+ inprog = rvu_read64(rvu, blkaddr,
+ CPT_AF_BAR2_ALIASX(slot, CPT_LF_INPROG));
+ inprog &= ~BIT_ULL(16);
+ rvu_write64(rvu, blkaddr,
+ CPT_AF_BAR2_ALIASX(slot, CPT_LF_INPROG), inprog);
+
+ /* Wait for CPT queue to become execution-quiescent */
+ do {
+ inprog = rvu_read64(rvu, blkaddr,
+ CPT_AF_BAR2_ALIASX(slot, CPT_LF_INPROG));
+ /* Check for partial entries (GRB_PARTIAL) */
+ if (inprog & BIT_ULL(31))
+ i = 0;
+ else
+ i++;
+
+ grp_ptr = rvu_read64(rvu, blkaddr,
+ CPT_AF_BAR2_ALIASX(slot,
+ CPT_LF_Q_GRP_PTR));
+ } while ((i < 10) && (((grp_ptr >> 32) & 0x7FFF) !=
+ (grp_ptr & 0x7FFF)));
+
+ i = 0;
+ do {
+ inprog = rvu_read64(rvu, blkaddr,
+ CPT_AF_BAR2_ALIASX(slot, CPT_LF_INPROG));
+ /* GWB writes groups of 40. So below formula is used for
+ * knowing that no more instructions will be scheduled
+ * (INFLIGHT == 0) && (GWB < 40) && (GRB == 0 OR 40)
+ */
+ if (((inprog & 0x1FF) == 0) &&
+ (((inprog >> 40) & 0xFF) < 40) &&
+ ((((inprog >> 32) & 0xFF) == 0) ||
+ (((inprog >> 32) & 0xFF) == 40)))
+ i++;
+ else
+ i = 0;
+ } while (i < 10);
+}
+
+int rvu_cpt_lf_teardown(struct rvu *rvu, u16 pcifunc, int lf, int slot)
+{
+ int blkaddr;
+ u64 reg;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_CPT, pcifunc);
+ if (blkaddr != BLKADDR_CPT0 && blkaddr != BLKADDR_CPT1)
+ return -EINVAL;
+
+ /* Enable BAR2 ALIAS for this pcifunc. */
+ reg = BIT_ULL(16) | pcifunc;
+ rvu_write64(rvu, blkaddr, CPT_AF_BAR2_SEL, reg);
+
+ cpt_lf_disable_iqueue(rvu, blkaddr, slot);
+
+ /* Set group drop to help clear out hardware */
+ reg = rvu_read64(rvu, blkaddr, CPT_AF_BAR2_ALIASX(slot, CPT_LF_INPROG));
+ reg |= BIT_ULL(17);
+ rvu_write64(rvu, blkaddr, CPT_AF_BAR2_ALIASX(slot, CPT_LF_INPROG), reg);
+
+ rvu_write64(rvu, blkaddr, CPT_AF_BAR2_SEL, 0);
+
+ return 0;
+}
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
index 0fb2aa909a23..79a6dcf0e3c0 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_reg.h
@@ -484,9 +484,17 @@
#define CPT_AF_RAS_INT_ENA_W1S (0x47030)
#define CPT_AF_RAS_INT_ENA_W1C (0x47038)
+#define AF_BAR2_ALIASX(a, b) (0x9100000ull | (a) << 12 | (b))
+#define CPT_AF_BAR2_SEL 0x9000000
+#define CPT_AF_BAR2_ALIASX(a, b) AF_BAR2_ALIASX(a, b)
+
#define CPT_AF_LF_CTL2_SHIFT 3
#define CPT_AF_LF_SSO_PF_FUNC_SHIFT 32
+#define CPT_LF_CTL 0x10
+#define CPT_LF_INPROG 0x40
+#define CPT_LF_Q_GRP_PTR 0x120
+
#define NPC_AF_BLK_RST (0x00040)
/* NPC */
--
2.29.0
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