Merge branch 'octeopntx2-LMTST-regions'

Geetha sowjanya says:

====================
Dynamic LMTST region setup

This patch series allows RVU PF/VF to allocate memory for
LMTST operations instead of using memory reserved by firmware
which is mapped as device memory.
The LMTST mapping table contains the RVU PF/VF LMTST memory base
address entries. This table is used by hardware for LMTST operations.
Patch1 introduces new mailbox message to update the LMTST table with
the new allocated memory address.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -134,6 +134,8 @@ M(MSIX_OFFSET,		0x005, msix_offset, msg_req, msix_offset_rsp)	\
 M(VF_FLR,		0x006, vf_flr, msg_req, msg_rsp)		\
 M(PTP_OP,		0x007, ptp_op, ptp_req, ptp_rsp)		\
 M(GET_HW_CAP,		0x008, get_hw_cap, msg_req, get_hw_cap_rsp)	\
+M(LMTST_TBL_SETUP,	0x00a, lmtst_tbl_setup, lmtst_tbl_setup_req,    \
+				msg_rsp)				\
 M(SET_VF_PERM,		0x00b, set_vf_perm, set_vf_perm, msg_rsp)	\
 /* CGX mbox IDs (range 0x200 - 0x3FF) */				\
 M(CGX_START_RXTX,	0x200, cgx_start_rxtx, msg_req, msg_rsp)	\
@@ -1278,6 +1280,14 @@ struct set_vf_perm  {
 	u64	flags;
 };
 
+struct lmtst_tbl_setup_req {
+	struct mbox_msghdr hdr;
+	u16 base_pcifunc;
+	u8  use_local_lmt_region;
+	u64 lmt_iova;
+	u64 rsvd[4];
+};
+
 /* CPT mailbox error codes
  * Range 901 - 1000.
  */

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

@@ -2333,6 +2333,7 @@ static void __rvu_flr_handler(struct rvu *rvu, u16 pcifunc)
 	rvu_blklf_teardown(rvu, pcifunc, BLKADDR_SSOW);
 	rvu_blklf_teardown(rvu, pcifunc, BLKADDR_SSO);
 	rvu_blklf_teardown(rvu, pcifunc, BLKADDR_NPA);
+	rvu_reset_lmt_map_tbl(rvu, pcifunc);
 	rvu_detach_rsrcs(rvu, NULL, pcifunc);
 	mutex_unlock(&rvu->flr_lock);
 }

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

@@ -243,6 +243,7 @@ struct rvu_pfvf {
 	u8	nix_blkaddr; /* BLKADDR_NIX0/1 assigned to this PF */
 	u8	nix_rx_intf; /* NIX0_RX/NIX1_RX interface to NPC */
 	u8	nix_tx_intf; /* NIX0_TX/NIX1_TX interface to NPC */
+	u64     lmt_base_addr; /* Preseving the pcifunc's lmtst base addr*/
 	unsigned long flags;
 };
 
@@ -754,6 +755,9 @@ int rvu_cpt_lf_teardown(struct rvu *rvu, u16 pcifunc, int lf, int slot);
 int rvu_set_channels_base(struct rvu *rvu);
 void rvu_program_channels(struct rvu *rvu);
 
+/* CN10K RVU - LMT*/
+void rvu_reset_lmt_map_tbl(struct rvu *rvu, u16 pcifunc);
+
 #ifdef CONFIG_DEBUG_FS
 void rvu_dbg_init(struct rvu *rvu);
 void rvu_dbg_exit(struct rvu *rvu);

drivers/net/ethernet/marvell/octeontx2/af/rvu_cn10k.c

@@ -10,6 +10,206 @@
 #include "cgx.h"
 #include "rvu_reg.h"
 
+/* RVU LMTST */
+#define LMT_TBL_OP_READ		0
+#define LMT_TBL_OP_WRITE	1
+#define LMT_MAP_TABLE_SIZE	(128 * 1024)
+#define LMT_MAPTBL_ENTRY_SIZE	16
+
+/* Function to perform operations (read/write) on lmtst map table */
+static int lmtst_map_table_ops(struct rvu *rvu, u32 index, u64 *val,
+			       int lmt_tbl_op)
+{
+	void __iomem *lmt_map_base;
+	u64 tbl_base;
+
+	tbl_base = rvu_read64(rvu, BLKADDR_APR, APR_AF_LMT_MAP_BASE);
+
+	lmt_map_base = ioremap_wc(tbl_base, LMT_MAP_TABLE_SIZE);
+	if (!lmt_map_base) {
+		dev_err(rvu->dev, "Failed to setup lmt map table mapping!!\n");
+		return -ENOMEM;
+	}
+
+	if (lmt_tbl_op == LMT_TBL_OP_READ) {
+		*val = readq(lmt_map_base + index);
+	} else {
+		writeq((*val), (lmt_map_base + index));
+		/* Flushing the AP interceptor cache to make APR_LMT_MAP_ENTRY_S
+		 * changes effective. Write 1 for flush and read is being used as a
+		 * barrier and sets up a data dependency. Write to 0 after a write
+		 * to 1 to complete the flush.
+		 */
+		rvu_write64(rvu, BLKADDR_APR, APR_AF_LMT_CTL, BIT_ULL(0));
+		rvu_read64(rvu, BLKADDR_APR, APR_AF_LMT_CTL);
+		rvu_write64(rvu, BLKADDR_APR, APR_AF_LMT_CTL, 0x00);
+	}
+
+	iounmap(lmt_map_base);
+	return 0;
+}
+
+static u32 rvu_get_lmtst_tbl_index(struct rvu *rvu, u16 pcifunc)
+{
+	return ((rvu_get_pf(pcifunc) * rvu->hw->total_vfs) +
+		(pcifunc & RVU_PFVF_FUNC_MASK)) * LMT_MAPTBL_ENTRY_SIZE;
+}
+
+static int rvu_get_lmtaddr(struct rvu *rvu, u16 pcifunc,
+			   u64 iova, u64 *lmt_addr)
+{
+	u64 pa, val, pf;
+	int err;
+
+	if (!iova) {
+		dev_err(rvu->dev, "%s Requested Null address for transulation\n", __func__);
+		return -EINVAL;
+	}
+
+	rvu_write64(rvu, BLKADDR_RVUM, RVU_AF_SMMU_ADDR_REQ, iova);
+	pf = rvu_get_pf(pcifunc) & 0x1F;
+	val = BIT_ULL(63) | BIT_ULL(14) | BIT_ULL(13) | pf << 8 |
+	      ((pcifunc & RVU_PFVF_FUNC_MASK) & 0xFF);
+	rvu_write64(rvu, BLKADDR_RVUM, RVU_AF_SMMU_TXN_REQ, val);
+
+	err = rvu_poll_reg(rvu, BLKADDR_RVUM, RVU_AF_SMMU_ADDR_RSP_STS, BIT_ULL(0), false);
+	if (err) {
+		dev_err(rvu->dev, "%s LMTLINE iova transulation failed\n", __func__);
+		return err;
+	}
+	val = rvu_read64(rvu, BLKADDR_RVUM, RVU_AF_SMMU_ADDR_RSP_STS);
+	if (val & ~0x1ULL) {
+		dev_err(rvu->dev, "%s LMTLINE iova transulation failed err:%llx\n", __func__, val);
+		return -EIO;
+	}
+	/* PA[51:12] = RVU_AF_SMMU_TLN_FLIT1[60:21]
+	 * PA[11:0] = IOVA[11:0]
+	 */
+	pa = rvu_read64(rvu, BLKADDR_RVUM, RVU_AF_SMMU_TLN_FLIT1) >> 21;
+	pa &= GENMASK_ULL(39, 0);
+	*lmt_addr = (pa << 12) | (iova  & 0xFFF);
+
+	return 0;
+}
+
+static int rvu_update_lmtaddr(struct rvu *rvu, u16 pcifunc, u64 lmt_addr)
+{
+	struct rvu_pfvf *pfvf = rvu_get_pfvf(rvu, pcifunc);
+	u32 tbl_idx;
+	int err = 0;
+	u64 val;
+
+	/* Read the current lmt addr of pcifunc */
+	tbl_idx = rvu_get_lmtst_tbl_index(rvu, pcifunc);
+	err = lmtst_map_table_ops(rvu, tbl_idx, &val, LMT_TBL_OP_READ);
+	if (err) {
+		dev_err(rvu->dev,
+			"Failed to read LMT map table: index 0x%x err %d\n",
+			tbl_idx, err);
+		return err;
+	}
+
+	/* Storing the seondary's lmt base address as this needs to be
+	 * reverted in FLR. Also making sure this default value doesn't
+	 * get overwritten on multiple calls to this mailbox.
+	 */
+	if (!pfvf->lmt_base_addr)
+		pfvf->lmt_base_addr = val;
+
+	/* Update the LMT table with new addr */
+	err = lmtst_map_table_ops(rvu, tbl_idx, &lmt_addr, LMT_TBL_OP_WRITE);
+	if (err) {
+		dev_err(rvu->dev,
+			"Failed to update LMT map table: index 0x%x err %d\n",
+			tbl_idx, err);
+		return err;
+	}
+	return 0;
+}
+
+int rvu_mbox_handler_lmtst_tbl_setup(struct rvu *rvu,
+				     struct lmtst_tbl_setup_req *req,
+				     struct msg_rsp *rsp)
+{
+	u64 lmt_addr, val;
+	u32 pri_tbl_idx;
+	int err = 0;
+
+	/* Check if PF_FUNC wants to use it's own local memory as LMTLINE
+	 * region, if so, convert that IOVA to physical address and
+	 * populate LMT table with that address
+	 */
+	if (req->use_local_lmt_region) {
+		err = rvu_get_lmtaddr(rvu, req->hdr.pcifunc,
+				      req->lmt_iova, &lmt_addr);
+		if (err < 0)
+			return err;
+
+		/* Update the lmt addr for this PFFUNC in the LMT table */
+		err = rvu_update_lmtaddr(rvu, req->hdr.pcifunc, lmt_addr);
+		if (err)
+			return err;
+	}
+
+	/* Reconfiguring lmtst map table in lmt region shared mode i.e. make
+	 * multiple PF_FUNCs to share an LMTLINE region, so primary/base
+	 * pcifunc (which is passed as an argument to mailbox) is the one
+	 * whose lmt base address will be shared among other secondary
+	 * pcifunc (will be the one who is calling this mailbox).
+	 */
+	if (req->base_pcifunc) {
+		/* Calculating the LMT table index equivalent to primary
+		 * pcifunc.
+		 */
+		pri_tbl_idx = rvu_get_lmtst_tbl_index(rvu, req->base_pcifunc);
+
+		/* Read the base lmt addr of the primary pcifunc */
+		err = lmtst_map_table_ops(rvu, pri_tbl_idx, &val,
+					  LMT_TBL_OP_READ);
+		if (err) {
+			dev_err(rvu->dev,
+				"Failed to read LMT map table: index 0x%x err %d\n",
+				pri_tbl_idx, err);
+			return err;
+		}
+
+		/* Update the base lmt addr of secondary with primary's base
+		 * lmt addr.
+		 */
+		err = rvu_update_lmtaddr(rvu, req->hdr.pcifunc, val);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+/* Resetting the lmtst map table to original base addresses */
+void rvu_reset_lmt_map_tbl(struct rvu *rvu, u16 pcifunc)
+{
+	struct rvu_pfvf *pfvf = rvu_get_pfvf(rvu, pcifunc);
+	u32 tbl_idx;
+	int err;
+
+	if (is_rvu_otx2(rvu))
+		return;
+
+	if (pfvf->lmt_base_addr) {
+		/* This corresponds to lmt map table index */
+		tbl_idx = rvu_get_lmtst_tbl_index(rvu, pcifunc);
+		/* Reverting back original lmt base addr for respective
+		 * pcifunc.
+		 */
+		err = lmtst_map_table_ops(rvu, tbl_idx, &pfvf->lmt_base_addr,
+					  LMT_TBL_OP_WRITE);
+		if (err)
+			dev_err(rvu->dev,
+				"Failed to update LMT map table: index 0x%x err %d\n",
+				tbl_idx, err);
+		pfvf->lmt_base_addr = 0;
+	}
+}
+
 int rvu_set_channels_base(struct rvu *rvu)
 {
 	struct rvu_hwinfo *hw = rvu->hw;

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

@@ -49,6 +49,11 @@
 #define RVU_AF_PFX_VF_BAR4_ADDR             (0x5400 | (a) << 4)
 #define RVU_AF_PFX_VF_BAR4_CFG              (0x5600 | (a) << 4)
 #define RVU_AF_PFX_LMTLINE_ADDR             (0x5800 | (a) << 4)
+#define RVU_AF_SMMU_ADDR_REQ		    (0x6000)
+#define RVU_AF_SMMU_TXN_REQ		    (0x6008)
+#define RVU_AF_SMMU_ADDR_RSP_STS	    (0x6010)
+#define RVU_AF_SMMU_ADDR_TLN		    (0x6018)
+#define RVU_AF_SMMU_TLN_FLIT1		    (0x6030)
 
 /* Admin function's privileged PF/VF registers */
 #define RVU_PRIV_CONST                      (0x8000000)
@@ -692,4 +697,9 @@
 #define LBK_LINK_CFG_ID_MASK		GENMASK_ULL(11, 6)
 #define LBK_LINK_CFG_BASE_MASK		GENMASK_ULL(5, 0)
 
+/* APR */
+#define	APR_AF_LMT_CFG			(0x000ull)
+#define	APR_AF_LMT_MAP_BASE		(0x008ull)
+#define	APR_AF_LMT_CTL			(0x010ull)
+
 #endif /* RVU_REG_H */

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

@@ -35,7 +35,8 @@ enum rvu_block_addr_e {
 	BLKADDR_NDC_NPA0	= 0xeULL,
 	BLKADDR_NDC_NIX1_RX	= 0x10ULL,
 	BLKADDR_NDC_NIX1_TX	= 0x11ULL,
-	BLK_COUNT		= 0x12ULL,
+	BLKADDR_APR		= 0x16ULL,
+	BLK_COUNT		= 0x17ULL,
 };
 
 /* RVU Block Type Enumeration */