[net PATCH v2 6/7] octeontx2-af: Skip PFs if not enabled

Sai Krishna
2023-04-07T12:25:18Z

From: Ratheesh Kannoth <rkannoth@marvell.com>

Skip mbox initialization of disabled PFs. Firmware configures PFs
and allocate mbox resources etc. Linux should configure particular
PFs, which ever are enabled by firmware.

Fixes: 9bdc47a6e328 ("octeontx2-af: Mbox communication support btw AF and it's VFs")
Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Sai Krishna <saikrishnag@marvell.com>
---
.../net/ethernet/marvell/octeontx2/af/mbox.c | 5 ++-
.../net/ethernet/marvell/octeontx2/af/mbox.h | 3 +-
.../net/ethernet/marvell/octeontx2/af/rvu.c | 38 ++++++++++++++++---
3 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.c b/drivers/net/ethernet/marvell/octeontx2/af/mbox.c
index 2898931d5260..9690ac01f02c 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.c
@@ -157,7 +157,7 @@ EXPORT_SYMBOL(otx2_mbox_init);
*/
int otx2_mbox_regions_init(struct otx2_mbox *mbox, void **hwbase,
struct pci_dev *pdev, void *reg_base,
- int direction, int ndevs)
+ int direction, int ndevs, unsigned long *pf_bmap)
{
struct otx2_mbox_dev *mdev;
int devid, err;
@@ -169,6 +169,9 @@ int otx2_mbox_regions_init(struct otx2_mbox *mbox, void **hwbase,
mbox->hwbase = hwbase[0];

for (devid = 0; devid < ndevs; devid++) {
+ if (!test_bit(devid, pf_bmap))
+ continue;
+
mdev = &mbox->dev[devid];
mdev->mbase = hwbase[devid];
mdev->hwbase = hwbase[devid];
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index 0ce533848536..26636a4d7dcc 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -96,9 +96,10 @@ void otx2_mbox_destroy(struct otx2_mbox *mbox);
int otx2_mbox_init(struct otx2_mbox *mbox, void __force *hwbase,
struct pci_dev *pdev, void __force *reg_base,
int direction, int ndevs);
+
int otx2_mbox_regions_init(struct otx2_mbox *mbox, void __force **hwbase,
struct pci_dev *pdev, void __force *reg_base,
- int direction, int ndevs);
+ int direction, int ndevs, unsigned long *bmap);
void otx2_mbox_msg_send(struct otx2_mbox *mbox, int devid);
int otx2_mbox_wait_for_rsp(struct otx2_mbox *mbox, int devid);
int otx2_mbox_busy_poll_for_rsp(struct otx2_mbox *mbox, int devid);
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index 8683ce57ed3f..61c658fa3f28 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -2282,7 +2282,7 @@ static inline void rvu_afvf_mbox_up_handler(struct work_struct *work)
}

static int rvu_get_mbox_regions(struct rvu *rvu, void **mbox_addr,
- int num, int type)
+ int num, int type, unsigned long *pf_bmap)
{
struct rvu_hwinfo *hw = rvu->hw;
int region;
@@ -2294,6 +2294,9 @@ static int rvu_get_mbox_regions(struct rvu *rvu, void **mbox_addr,
*/
if (type == TYPE_AFVF) {
for (region = 0; region < num; region++) {
+ if (!test_bit(region, pf_bmap))
+ continue;
+
if (hw->cap.per_pf_mbox_regs) {
bar4 = rvu_read64(rvu, BLKADDR_RVUM,
RVU_AF_PFX_BAR4_ADDR(0)) +
@@ -2315,6 +2318,9 @@ static int rvu_get_mbox_regions(struct rvu *rvu, void **mbox_addr,
* RVU_AF_PF_BAR4_ADDR register.
*/
for (region = 0; region < num; region++) {
+ if (!test_bit(region, pf_bmap))
+ continue;
+
if (hw->cap.per_pf_mbox_regs) {
bar4 = rvu_read64(rvu, BLKADDR_RVUM,
RVU_AF_PFX_BAR4_ADDR(region));
@@ -2343,8 +2349,27 @@ static int rvu_mbox_init(struct rvu *rvu, struct mbox_wq_info *mw,
int err = -EINVAL, i, dir, dir_up;
void __iomem *reg_base;
struct rvu_work *mwork;
+ unsigned long *pf_bmap;
void **mbox_regions;
const char *name;
+ u64 cfg;
+
+ pf_bmap = devm_kcalloc(rvu->dev, BITS_TO_LONGS(num), sizeof(long), GFP_KERNEL);
+ if (!pf_bmap)
+ return -ENOMEM;
+
+ /* RVU VFs */
+ if (type == TYPE_AFVF)
+ bitmap_set(pf_bmap, 0, num);
+
+ if (type == TYPE_AFPF) {
+ /* Mark enabled PFs in bitmap */
+ for (i = 0; i < num; i++) {
+ cfg = rvu_read64(rvu, BLKADDR_RVUM, RVU_PRIV_PFX_CFG(i));
+ if (cfg & BIT_ULL(20))
+ set_bit(i, pf_bmap);
+ }
+ }

mbox_regions = kcalloc(num, sizeof(void *), GFP_KERNEL);
if (!mbox_regions)
@@ -2356,7 +2381,7 @@ static int rvu_mbox_init(struct rvu *rvu, struct mbox_wq_info *mw,
dir = MBOX_DIR_AFPF;
dir_up = MBOX_DIR_AFPF_UP;
reg_base = rvu->afreg_base;
- err = rvu_get_mbox_regions(rvu, mbox_regions, num, TYPE_AFPF);
+ err = rvu_get_mbox_regions(rvu, mbox_regions, num, TYPE_AFPF, pf_bmap);
if (err)
goto free_regions;
break;
@@ -2365,7 +2390,7 @@ static int rvu_mbox_init(struct rvu *rvu, struct mbox_wq_info *mw,
dir = MBOX_DIR_PFVF;
dir_up = MBOX_DIR_PFVF_UP;
reg_base = rvu->pfreg_base;
- err = rvu_get_mbox_regions(rvu, mbox_regions, num, TYPE_AFVF);
+ err = rvu_get_mbox_regions(rvu, mbox_regions, num, TYPE_AFVF, pf_bmap);
if (err)
goto free_regions;
break;
@@ -2396,16 +2421,19 @@ static int rvu_mbox_init(struct rvu *rvu, struct mbox_wq_info *mw,
}

err = otx2_mbox_regions_init(&mw->mbox, mbox_regions, rvu->pdev,
- reg_base, dir, num);
+ reg_base, dir, num, pf_bmap);
if (err)
goto exit;

err = otx2_mbox_regions_init(&mw->mbox_up, mbox_regions, rvu->pdev,
- reg_base, dir_up, num);
+ reg_base, dir_up, num, pf_bmap);
if (err)
goto exit;

for (i = 0; i < num; i++) {
+ if (!test_bit(i, pf_bmap))
+ continue;
+
mwork = &mw->mbox_wrk[i];
mwork->rvu = rvu;
INIT_WORK(&mwork->work, mbox_handler);
--
2.25.1