Merge branch 'octeontx2-af-fixes'

Hariprasad Kelam says:

====================
octeontx2-af: MAC block fixes for CN10KB

This patch set contains fixes for the issues encountered in testing
CN10KB MAC block RPM_USX.

Patch1: firmware to kernel communication is not working due to wrong
        interrupt configuration. CSR addresses are corrected.

Patch2: NIX to RVU PF mapping errors encountered due to wrong firmware
        config. Corrects this mapping error.

Patch3: Driver is trying to access non exist cgx/lmac which is resulting
        in kernel panic. Address this issue by adding proper checks.

Patch4: MAC features are not getting reset on FLR. Fix the issue by
        resetting the stale config.
====================

Signed-off-by: David S. Miller <[email protected]>

drivers/net/ethernet/marvell/octeontx2/af/cgx.c

@@ -169,13 +169,20 @@ void cgx_lmac_write(int cgx_id, int lmac_id, u64 offset, u64 val)
 {
 	struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
 
+	/* Software must not access disabled LMAC registers */
+	if (!is_lmac_valid(cgx_dev, lmac_id))
+		return;
 	cgx_write(cgx_dev, lmac_id, offset, val);
 }
 
 u64 cgx_lmac_read(int cgx_id, int lmac_id, u64 offset)
 {
 	struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
 
+	/* Software must not access disabled LMAC registers */
+	if (!is_lmac_valid(cgx_dev, lmac_id))
+		return 0;
+
 	return cgx_read(cgx_dev, lmac_id, offset);
 }
 
@@ -530,14 +537,15 @@ static u32 cgx_get_lmac_fifo_len(void *cgxd, int lmac_id)
 int cgx_lmac_internal_loopback(void *cgxd, int lmac_id, bool enable)
 {
 	struct cgx *cgx = cgxd;
-	u8 lmac_type;
+	struct lmac *lmac;
 	u64 cfg;
 
 	if (!is_lmac_valid(cgx, lmac_id))
 		return -ENODEV;
 
-	lmac_type = cgx->mac_ops->get_lmac_type(cgx, lmac_id);
-	if (lmac_type == LMAC_MODE_SGMII || lmac_type == LMAC_MODE_QSGMII) {
+	lmac = lmac_pdata(lmac_id, cgx);
+	if (lmac->lmac_type == LMAC_MODE_SGMII ||
+	    lmac->lmac_type == LMAC_MODE_QSGMII) {
 		cfg = cgx_read(cgx, lmac_id, CGXX_GMP_PCS_MRX_CTL);
 		if (enable)
 			cfg |= CGXX_GMP_PCS_MRX_CTL_LBK;
@@ -1556,6 +1564,23 @@ int cgx_lmac_linkup_start(void *cgxd)
 	return 0;
 }
 
+int cgx_lmac_reset(void *cgxd, int lmac_id, u8 pf_req_flr)
+{
+	struct cgx *cgx = cgxd;
+	u64 cfg;
+
+	if (!is_lmac_valid(cgx, lmac_id))
+		return -ENODEV;
+
+	/* Resetting PFC related CSRs */
+	cfg = 0xff;
+	cgx_write(cgxd, lmac_id, CGXX_CMRX_RX_LOGL_XON, cfg);
+
+	if (pf_req_flr)
+		cgx_lmac_internal_loopback(cgxd, lmac_id, false);
+	return 0;
+}
+
 static int cgx_configure_interrupt(struct cgx *cgx, struct lmac *lmac,
 				   int cnt, bool req_free)
 {
@@ -1675,6 +1700,7 @@ static int cgx_lmac_init(struct cgx *cgx)
 		cgx->lmac_idmap[lmac->lmac_id] = lmac;
 		set_bit(lmac->lmac_id, &cgx->lmac_bmap);
 		cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, true);
+		lmac->lmac_type = cgx->mac_ops->get_lmac_type(cgx, lmac->lmac_id);
 	}
 
 	return cgx_lmac_verify_fwi_version(cgx);
@@ -1771,6 +1797,7 @@ static struct mac_ops	cgx_mac_ops    = {
 	.mac_tx_enable =		cgx_lmac_tx_enable,
 	.pfc_config =                   cgx_lmac_pfc_config,
 	.mac_get_pfc_frm_cfg   =        cgx_lmac_get_pfc_frm_cfg,
+	.mac_reset   =			cgx_lmac_reset,
 };
 
 static int cgx_probe(struct pci_dev *pdev, const struct pci_device_id *id)

drivers/net/ethernet/marvell/octeontx2/af/cgx.h

@@ -35,6 +35,7 @@
 #define CGXX_CMRX_INT_ENA_W1S		0x058
 #define CGXX_CMRX_RX_ID_MAP		0x060
 #define CGXX_CMRX_RX_STAT0		0x070
+#define CGXX_CMRX_RX_LOGL_XON		0x100
 #define CGXX_CMRX_RX_LMACS		0x128
 #define CGXX_CMRX_RX_DMAC_CTL0		(0x1F8 + mac_ops->csr_offset)
 #define CGX_DMAC_CTL0_CAM_ENABLE	BIT_ULL(3)
@@ -181,4 +182,5 @@ int cgx_lmac_get_pfc_frm_cfg(void *cgxd, int lmac_id, u8 *tx_pause,
 			     u8 *rx_pause);
 int verify_lmac_fc_cfg(void *cgxd, int lmac_id, u8 tx_pause, u8 rx_pause,
 		       int pfvf_idx);
+int cgx_lmac_reset(void *cgxd, int lmac_id, u8 pf_req_flr);
 #endif /* CGX_H */

drivers/net/ethernet/marvell/octeontx2/af/lmac_common.h

@@ -24,6 +24,7 @@
  * @cgx:		parent cgx port
  * @mcast_filters_count:  Number of multicast filters installed
  * @lmac_id:		lmac port id
+ * @lmac_type:	        lmac type like SGMII/XAUI
  * @cmd_pend:		flag set before new command is started
  *			flag cleared after command response is received
  * @name:		lmac port name
@@ -43,6 +44,7 @@ struct lmac {
 	struct cgx *cgx;
 	u8 mcast_filters_count;
 	u8 lmac_id;
+	u8 lmac_type;
 	bool cmd_pend;
 	char *name;
 };
@@ -125,6 +127,7 @@ struct mac_ops {
 
 	int                     (*mac_get_pfc_frm_cfg)(void *cgxd, int lmac_id,
 						       u8 *tx_pause, u8 *rx_pause);
+	int			(*mac_reset)(void *cgxd, int lmac_id, u8 pf_req_flr);
 
 	/* FEC stats */
 	int			(*get_fec_stats)(void *cgxd, int lmac_id,

drivers/net/ethernet/marvell/octeontx2/af/rpm.c

@@ -37,6 +37,7 @@ static struct mac_ops		rpm_mac_ops   = {
 	.mac_tx_enable =		rpm_lmac_tx_enable,
 	.pfc_config =                   rpm_lmac_pfc_config,
 	.mac_get_pfc_frm_cfg   =        rpm_lmac_get_pfc_frm_cfg,
+	.mac_reset   =			rpm_lmac_reset,
 };
 
 static struct mac_ops		rpm2_mac_ops   = {
@@ -47,7 +48,7 @@ static struct mac_ops		rpm2_mac_ops   = {
 	.int_set_reg    =       RPM2_CMRX_SW_INT_ENA_W1S,
 	.irq_offset     =       1,
 	.int_ena_bit    =       BIT_ULL(0),
-	.lmac_fwi	=	RPM_LMAC_FWI,
+	.lmac_fwi	=	RPM2_LMAC_FWI,
 	.non_contiguous_serdes_lane = true,
 	.rx_stats_cnt   =       43,
 	.tx_stats_cnt   =       34,
@@ -68,6 +69,7 @@ static struct mac_ops		rpm2_mac_ops   = {
 	.mac_tx_enable =		rpm_lmac_tx_enable,
 	.pfc_config =                   rpm_lmac_pfc_config,
 	.mac_get_pfc_frm_cfg   =        rpm_lmac_get_pfc_frm_cfg,
+	.mac_reset   =			rpm_lmac_reset,
 };
 
 bool is_dev_rpm2(void *rpmd)
@@ -537,14 +539,15 @@ u32 rpm2_get_lmac_fifo_len(void *rpmd, int lmac_id)
 int rpm_lmac_internal_loopback(void *rpmd, int lmac_id, bool enable)
 {
 	rpm_t *rpm = rpmd;
-	u8 lmac_type;
+	struct lmac *lmac;
 	u64 cfg;
 
 	if (!is_lmac_valid(rpm, lmac_id))
 		return -ENODEV;
-	lmac_type = rpm->mac_ops->get_lmac_type(rpm, lmac_id);
 
-	if (lmac_type == LMAC_MODE_QSGMII || lmac_type == LMAC_MODE_SGMII) {
+	lmac = lmac_pdata(lmac_id, rpm);
+	if (lmac->lmac_type == LMAC_MODE_QSGMII ||
+	    lmac->lmac_type == LMAC_MODE_SGMII) {
 		dev_err(&rpm->pdev->dev, "loopback not supported for LPC mode\n");
 		return 0;
 	}
@@ -713,3 +716,24 @@ int rpm_get_fec_stats(void *rpmd, int lmac_id, struct cgx_fec_stats_rsp *rsp)
 
 	return 0;
 }
+
+int rpm_lmac_reset(void *rpmd, int lmac_id, u8 pf_req_flr)
+{
+	u64 rx_logl_xon, cfg;
+	rpm_t *rpm = rpmd;
+
+	if (!is_lmac_valid(rpm, lmac_id))
+		return -ENODEV;
+
+	/* Resetting PFC related CSRs */
+	rx_logl_xon = is_dev_rpm2(rpm) ? RPM2_CMRX_RX_LOGL_XON :
+					 RPMX_CMRX_RX_LOGL_XON;
+	cfg = 0xff;
+
+	rpm_write(rpm, lmac_id, rx_logl_xon, cfg);
+
+	if (pf_req_flr)
+		rpm_lmac_internal_loopback(rpm, lmac_id, false);
+
+	return 0;
+}

drivers/net/ethernet/marvell/octeontx2/af/rpm.h

@@ -74,6 +74,7 @@
 #define RPMX_MTI_MAC100X_CL01_PAUSE_QUANTA              0x80A8
 #define RPMX_MTI_MAC100X_CL89_PAUSE_QUANTA		0x8108
 #define RPM_DEFAULT_PAUSE_TIME                          0x7FF
+#define RPMX_CMRX_RX_LOGL_XON				0x4100
 
 #define RPMX_MTI_MAC100X_XIF_MODE		        0x8100
 #define RPMX_ONESTEP_ENABLE				BIT_ULL(5)
@@ -94,7 +95,8 @@
 
 /* CN10KB CSR Declaration */
 #define  RPM2_CMRX_SW_INT				0x1b0
-#define  RPM2_CMRX_SW_INT_ENA_W1S			0x1b8
+#define  RPM2_CMRX_SW_INT_ENA_W1S			0x1c8
+#define  RPM2_LMAC_FWI					0x12
 #define  RPM2_CMR_CHAN_MSK_OR				0x3120
 #define  RPM2_CMR_RX_OVR_BP_EN				BIT_ULL(2)
 #define  RPM2_CMR_RX_OVR_BP_BP				BIT_ULL(1)
@@ -131,4 +133,5 @@ int rpm_lmac_get_pfc_frm_cfg(void *rpmd, int lmac_id, u8 *tx_pause,
 int rpm2_get_nr_lmacs(void *rpmd);
 bool is_dev_rpm2(void *rpmd);
 int rpm_get_fec_stats(void *cgxd, int lmac_id, struct cgx_fec_stats_rsp *rsp);
+int rpm_lmac_reset(void *rpmd, int lmac_id, u8 pf_req_flr);
 #endif /* RPM_H */

drivers/net/ethernet/marvell/octeontx2/af/rvu.c

@@ -2629,6 +2629,7 @@ static void __rvu_flr_handler(struct rvu *rvu, u16 pcifunc)
 	 * Since LF is detached use LF number as -1.
 	 */
 	rvu_npc_free_mcam_entries(rvu, pcifunc, -1);
+	rvu_mac_reset(rvu, pcifunc);
 
 	mutex_unlock(&rvu->flr_lock);
 }

drivers/net/ethernet/marvell/octeontx2/af/rvu.h

@@ -23,6 +23,7 @@
 #define	PCI_DEVID_OCTEONTX2_LBK			0xA061
 
 /* Subsystem Device ID */
+#define PCI_SUBSYS_DEVID_98XX                  0xB100
 #define PCI_SUBSYS_DEVID_96XX                  0xB200
 #define PCI_SUBSYS_DEVID_CN10K_A	       0xB900
 #define PCI_SUBSYS_DEVID_CNF10K_B              0xBC00
@@ -686,6 +687,16 @@ static inline u16 rvu_nix_chan_cpt(struct rvu *rvu, u8 chan)
 	return rvu->hw->cpt_chan_base + chan;
 }
 
+static inline bool is_rvu_supports_nix1(struct rvu *rvu)
+{
+	struct pci_dev *pdev = rvu->pdev;
+
+	if (pdev->subsystem_device == PCI_SUBSYS_DEVID_98XX)
+		return true;
+
+	return false;
+}
+
 /* Function Prototypes
  * RVU
  */
@@ -884,6 +895,7 @@ int rvu_cgx_config_tx(void *cgxd, int lmac_id, bool enable);
 int rvu_cgx_prio_flow_ctrl_cfg(struct rvu *rvu, u16 pcifunc, u8 tx_pause, u8 rx_pause,
 			       u16 pfc_en);
 int rvu_cgx_cfg_pause_frm(struct rvu *rvu, u16 pcifunc, u8 tx_pause, u8 rx_pause);
+void rvu_mac_reset(struct rvu *rvu, u16 pcifunc);
 u32 rvu_cgx_get_lmac_fifolen(struct rvu *rvu, int cgx, int lmac);
 int npc_get_nixlf_mcam_index(struct npc_mcam *mcam, u16 pcifunc, int nixlf,
 			     int type);

drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c

@@ -114,7 +114,7 @@ static void rvu_map_cgx_nix_block(struct rvu *rvu, int pf,
 	p2x = cgx_lmac_get_p2x(cgx_id, lmac_id);
 	/* Firmware sets P2X_SELECT as either NIX0 or NIX1 */
 	pfvf->nix_blkaddr = BLKADDR_NIX0;
-	if (p2x == CMR_P2X_SEL_NIX1)
+	if (is_rvu_supports_nix1(rvu) && p2x == CMR_P2X_SEL_NIX1)
 		pfvf->nix_blkaddr = BLKADDR_NIX1;
 }
 
@@ -1250,3 +1250,21 @@ int rvu_mbox_handler_cgx_prio_flow_ctrl_cfg(struct rvu *rvu,
 	mac_ops->mac_get_pfc_frm_cfg(cgxd, lmac_id, &rsp->tx_pause, &rsp->rx_pause);
 	return err;
 }
+
+void rvu_mac_reset(struct rvu *rvu, u16 pcifunc)
+{
+	int pf = rvu_get_pf(pcifunc);
+	struct mac_ops *mac_ops;
+	struct cgx *cgxd;
+	u8 cgx, lmac;
+
+	if (!is_pf_cgxmapped(rvu, pf))
+		return;
+
+	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx, &lmac);
+	cgxd = rvu_cgx_pdata(cgx, rvu);
+	mac_ops = get_mac_ops(cgxd);
+
+	if (mac_ops->mac_reset(cgxd, lmac, !is_vf(pcifunc)))
+		dev_err(rvu->dev, "Failed to reset MAC\n");
+}