octeontx2-pf: cn10k: Add mbox support for CN10K

Firmware allocates memory regions for PFs and VFs in DRAM.
The PFs memory region is used for AF-PF and PF-VF mailbox.
This mbox facilitate communication between AF-PF and PF-VF.

On CN10K platform:
The DRAM region allocated to PF is enumerated as PF BAR4 memory.
PF BAR4 contains AF-PF mbox region followed by its VFs mbox region.
AF-PF mbox region base address is configured at RVU_AF_PFX_BAR4_ADDR
PF-VF mailbox base address is configured at
RVU_PF(x)_VF_MBOX_ADDR = RVU_AF_PF()_BAR4_ADDR+64KB. PF access its
mbox region via BAR4, whereas VF accesses PF-VF DRAM mailboxes via
BAR2 indirect access.

On CN9XX platform:
Mailbox region in DRAM is divided into two parts AF-PF mbox region and
PF-VF mbox region i.e all PFs mbox region is contiguous similarly all
VFs.
The base address of the AF-PF mbox region is configured at
RVU_AF_PF_BAR4_ADDR.
AF-PF1 mbox address can be calculated as RVU_AF_PF_BAR4_ADDR * mbox
size.
The base address of PF-VF mbox region for each PF is configure at
RVU_AF_PF(0..15)_VF_BAR4_ADDR.PF access its mbox region via BAR4 and its
VF mbox regions from RVU_PF_VF_BAR4_ADDR register, whereas VF access its
mbox region via BAR4.

This patch changes mbox initialization to support both CN9XX and CN10K
platform.
The patch also adds new hw_cap flag to setting hw features like TSO etc
and removes platform specific name from the PF/VF driver name to make it
appropriate for all supported platforms

This patch also removes platform specific name from the PF/VF driver name
to make it appropriate for all supported platforms

Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 26 insertions, 3 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index f8e2b6b1bf5a..3542f2d6c698 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -190,7 +190,6 @@ struct otx2_hw {
 	u8			lso_tsov6_idx;
 	u8			lso_udpv4_idx;
 	u8			lso_udpv6_idx;
-	u8			hw_tso;
 
 	/* MSI-X */
 	u8			cint_cnt; /* CQ interrupt count */
@@ -208,6 +207,9 @@ struct otx2_hw {
 	u64			cgx_fec_uncorr_blks;
 	u8			cgx_links;  /* No. of CGX links present in HW */
 	u8			lbk_links;  /* No. of LBK links present in HW */
+#define HW_TSO			BIT_ULL(0)
+#define CN10K_MBOX		BIT_ULL(1)
+	unsigned long		cap_flag;
 };
 
 struct otx2_vf_config {
@@ -341,6 +343,25 @@ static inline bool is_96xx_B0(struct pci_dev *pdev)
 		(pdev->subsystem_device == PCI_SUBSYS_DEVID_96XX_RVU_PFVF);
 }
 
+/* REVID for PCIe devices.
+ * Bits 0..1: minor pass, bit 3..2: major pass
+ * bits 7..4: midr id
+ */
+#define PCI_REVISION_ID_96XX		0x00
+#define PCI_REVISION_ID_95XX		0x10
+#define PCI_REVISION_ID_LOKI		0x20
+#define PCI_REVISION_ID_98XX		0x30
+#define PCI_REVISION_ID_95XXMM		0x40
+
+static inline bool is_dev_otx2(struct pci_dev *pdev)
+{
+	u8 midr = pdev->revision & 0xF0;
+
+	return (midr == PCI_REVISION_ID_96XX || midr == PCI_REVISION_ID_95XX ||
+		midr == PCI_REVISION_ID_LOKI || midr == PCI_REVISION_ID_98XX ||
+		midr == PCI_REVISION_ID_95XXMM);
+}
+
 static inline void otx2_setup_dev_hw_settings(struct otx2_nic *pfvf)
 {
 	struct otx2_hw *hw = &pfvf->hw;
@@ -349,10 +370,10 @@ static inline void otx2_setup_dev_hw_settings(struct otx2_nic *pfvf)
 	pfvf->hw.cq_ecount_wait = CQ_CQE_THRESH_DEFAULT;
 	pfvf->hw.cq_qcount_wait = CQ_QCOUNT_DEFAULT;
 
-	hw->hw_tso = true;
+	__set_bit(HW_TSO, &hw->cap_flag);
 
 	if (is_96xx_A0(pfvf->pdev)) {
-		hw->hw_tso = false;
+		__clear_bit(HW_TSO, &hw->cap_flag);
 
 		/* Time based irq coalescing is not supported */
 		pfvf->hw.cq_qcount_wait = 0x0;
@@ -363,6 +384,8 @@ static inline void otx2_setup_dev_hw_settings(struct otx2_nic *pfvf)
 		pfvf->hw.rq_skid = 600;
 		pfvf->qset.rqe_cnt = Q_COUNT(Q_SIZE_1K);
 	}
+	if (!is_dev_otx2(pfvf->pdev))
+		__set_bit(CN10K_MBOX, &hw->cap_flag);
 }
 
 /* Register read/write APIs */