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, 24 insertions, 13 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
index d3e4cfd244e2..e7d8fef4f53d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
@@ -8,8 +8,8 @@
 #include "otx2_common.h"
 #include "otx2_reg.h"
 
-#define DRV_NAME	"octeontx2-nicvf"
-#define DRV_STRING	"Marvell OcteonTX2 NIC Virtual Function Driver"
+#define DRV_NAME	"rvu_nicvf"
+#define DRV_STRING	"Marvell RVU NIC Virtual Function Driver"
 
 static const struct pci_device_id otx2_vf_id_table[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_RVU_AFVF) },
@@ -277,7 +277,7 @@ static void otx2vf_vfaf_mbox_destroy(struct otx2_nic *vf)
 		vf->mbox_wq = NULL;
 	}
 
-	if (mbox->mbox.hwbase)
+	if (mbox->mbox.hwbase && !test_bit(CN10K_MBOX, &vf->hw.cap_flag))
 		iounmap((void __iomem *)mbox->mbox.hwbase);
 
 	otx2_mbox_destroy(&mbox->mbox);
@@ -297,16 +297,25 @@ static int otx2vf_vfaf_mbox_init(struct otx2_nic *vf)
 	if (!vf->mbox_wq)
 		return -ENOMEM;
 
-	/* Mailbox is a reserved memory (in RAM) region shared between
-	 * admin function (i.e PF0) and this VF, shouldn't be mapped as
-	 * device memory to allow unaligned accesses.
-	 */
-	hwbase = ioremap_wc(pci_resource_start(vf->pdev, PCI_MBOX_BAR_NUM),
-			    pci_resource_len(vf->pdev, PCI_MBOX_BAR_NUM));
-	if (!hwbase) {
-		dev_err(vf->dev, "Unable to map VFAF mailbox region\n");
-		err = -ENOMEM;
-		goto exit;
+	if (test_bit(CN10K_MBOX, &vf->hw.cap_flag)) {
+		/* For cn10k platform, VF mailbox region is in its BAR2
+		 * register space
+		 */
+		hwbase = vf->reg_base + RVU_VF_MBOX_REGION;
+	} else {
+		/* Mailbox is a reserved memory (in RAM) region shared between
+		 * admin function (i.e PF0) and this VF, shouldn't be mapped as
+		 * device memory to allow unaligned accesses.
+		 */
+		hwbase = ioremap_wc(pci_resource_start(vf->pdev,
+						       PCI_MBOX_BAR_NUM),
+				    pci_resource_len(vf->pdev,
+						     PCI_MBOX_BAR_NUM));
+		if (!hwbase) {
+			dev_err(vf->dev, "Unable to map VFAF mailbox region\n");
+			err = -ENOMEM;
+			goto exit;
+		}
 	}
 
 	err = otx2_mbox_init(&mbox->mbox, hwbase, vf->pdev, vf->reg_base,
@@ -329,6 +338,8 @@ static int otx2vf_vfaf_mbox_init(struct otx2_nic *vf)
 
 	return 0;
 exit:
+	if (hwbase && !test_bit(CN10K_MBOX, &vf->hw.cap_flag))
+		iounmap(hwbase);
 	destroy_workqueue(vf->mbox_wq);
 	return err;
 }