Patch "octeontx2-af: optimize cpt pf identification" has been added to the 6.1-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    octeontx2-af: optimize cpt pf identification

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     octeontx2-af-optimize-cpt-pf-identification.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f0d86b49c90a554a82c96a48e6e0d0301a123b76
Author: Srujana Challa <schalla@xxxxxxxxxxx>
Date:   Wed Jan 18 17:33:51 2023 +0530

    octeontx2-af: optimize cpt pf identification
    
    [ Upstream commit 9adb04ff62f51265002c2c83e718bcf459e06e48 ]
    
    Optimize CPT PF identification in mbox handling for faster
    mbox response by doing it at AF driver probe instead of
    every mbox message.
    
    Signed-off-by: Srujana Challa <schalla@xxxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Stable-dep-of: a88e0f936ba9 ("octeontx2: Detect the mbox up or down message via register")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index d88d86bf07b03..8f5b7d14e3f7c 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -1164,8 +1164,16 @@ static int rvu_setup_hw_resources(struct rvu *rvu)
 		goto nix_err;
 	}
 
+	err = rvu_cpt_init(rvu);
+	if (err) {
+		dev_err(rvu->dev, "%s: Failed to initialize cpt\n", __func__);
+		goto mcs_err;
+	}
+
 	return 0;
 
+mcs_err:
+	rvu_mcs_exit(rvu);
 nix_err:
 	rvu_nix_freemem(rvu);
 npa_err:
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index 0b76dfa979d4e..e1760f9298b17 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -506,6 +506,7 @@ struct rvu {
 	struct ptp		*ptp;
 
 	int			mcs_blk_cnt;
+	int			cpt_pf_num;
 
 #ifdef CONFIG_DEBUG_FS
 	struct rvu_debugfs	rvu_dbg;
@@ -872,6 +873,7 @@ void rvu_cpt_unregister_interrupts(struct rvu *rvu);
 int rvu_cpt_lf_teardown(struct rvu *rvu, u16 pcifunc, int blkaddr, int lf,
 			int slot);
 int rvu_cpt_ctx_flush(struct rvu *rvu, u16 pcifunc);
+int rvu_cpt_init(struct rvu *rvu);
 
 #define NDC_AF_BANK_MASK       GENMASK_ULL(7, 0)
 #define NDC_AF_BANK_LINE_MASK  GENMASK_ULL(31, 16)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
index 1cd34914cb86b..923af460db296 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
@@ -340,7 +340,7 @@ static int get_cpt_pf_num(struct rvu *rvu)
 
 static bool is_cpt_pf(struct rvu *rvu, u16 pcifunc)
 {
-	int cpt_pf_num = get_cpt_pf_num(rvu);
+	int cpt_pf_num = rvu->cpt_pf_num;
 
 	if (rvu_get_pf(pcifunc) != cpt_pf_num)
 		return false;
@@ -352,7 +352,7 @@ static bool is_cpt_pf(struct rvu *rvu, u16 pcifunc)
 
 static bool is_cpt_vf(struct rvu *rvu, u16 pcifunc)
 {
-	int cpt_pf_num = get_cpt_pf_num(rvu);
+	int cpt_pf_num = rvu->cpt_pf_num;
 
 	if (rvu_get_pf(pcifunc) != cpt_pf_num)
 		return false;
@@ -1023,7 +1023,7 @@ int rvu_cpt_lf_teardown(struct rvu *rvu, u16 pcifunc, int blkaddr, int lf, int s
 static int cpt_inline_inb_lf_cmd_send(struct rvu *rvu, int blkaddr,
 				      int nix_blkaddr)
 {
-	int cpt_pf_num = get_cpt_pf_num(rvu);
+	int cpt_pf_num = rvu->cpt_pf_num;
 	struct cpt_inst_lmtst_req *req;
 	dma_addr_t res_daddr;
 	int timeout = 3000;
@@ -1167,3 +1167,10 @@ int rvu_cpt_ctx_flush(struct rvu *rvu, u16 pcifunc)
 
 	return 0;
 }
+
+int rvu_cpt_init(struct rvu *rvu)
+{
+	/* Retrieve CPT PF number */
+	rvu->cpt_pf_num = get_cpt_pf_num(rvu);
+	return 0;
+}