[Patch v3 02/12] net: mana: Record the physical address for doorbell page region

longli
2022-06-12T21:15:19Z

For supporting RDMA device with multiple user contexts with their
individual doorbell pages, record the start address of doorbell page
region for use by the RDMA driver to allocate user context doorbell IDs.

Signed-off-by: Long Li <longli@microsoft.com>
---
drivers/net/ethernet/microsoft/mana/gdma.h | 2 ++
drivers/net/ethernet/microsoft/mana/gdma_main.c | 4 ++++
2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/microsoft/mana/gdma.h b/drivers/net/ethernet/microsoft/mana/gdma.h
index d815d323be87..c724ca410fcb 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma.h
+++ b/drivers/net/ethernet/microsoft/mana/gdma.h
@@ -350,9 +350,11 @@ struct gdma_context {
struct completion eq_test_event;
u32 test_event_eq_id;

+ phys_addr_t bar0_pa;
void __iomem *bar0_va;
void __iomem *shm_base;
void __iomem *db_page_base;
+ phys_addr_t phys_db_page_base;
u32 db_page_size;

/* Shared memory chanenl (used to bootstrap HWC) */
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 49b85ca578b0..9fafaa0c8e76 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -27,6 +27,9 @@ static void mana_gd_init_registers(struct pci_dev *pdev)
gc->db_page_base = gc->bar0_va +
mana_gd_r64(gc, GDMA_REG_DB_PAGE_OFFSET);

+ gc->phys_db_page_base = gc->bar0_pa +
+ mana_gd_r64(gc, GDMA_REG_DB_PAGE_OFFSET);
+
gc->shm_base = gc->bar0_va + mana_gd_r64(gc, GDMA_REG_SHM_OFFSET);
}

@@ -1335,6 +1338,7 @@ static int mana_gd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

mutex_init(&gc->eq_test_event_mutex);
pci_set_drvdata(pdev, gc);
+ gc->bar0_pa = pci_resource_start(pdev, 0);

bar0_va = pci_iomap(pdev, bar, 0);
if (!bar0_va)
--
2.17.1