[PATCH] dmaengine: idxd: fix mapping of portal size
From: Dave Jiang <dave.jiang@intel.com>
Date: 2020-11-11 22:38:35
Subsystem:
dma generic offload engine subsystem, intel idxd driver, the rest · Maintainers:
Vinod Koul, Vinicius Costa Gomes, Linus Torvalds
Portal size is 4k. Current code is mapping all 4 portals in a single chunk.
Restrict the mapped portal size to a single portal to ensure that submission
only goes to the intended portal address.
Fixes: c52ca478233c ("dmaengine: idxd: add configuration component of driver")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/dma/idxd/device.c | 2 +-
drivers/dma/idxd/registers.h | 2 +-
drivers/dma/idxd/submit.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 506ac85c4a7f..663344987e3f 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c@@ -271,7 +271,7 @@ int idxd_wq_map_portal(struct idxd_wq *wq) resource_size_t start; start = pci_resource_start(pdev, IDXD_WQ_BAR); - start = start + wq->id * IDXD_PORTAL_SIZE; + start += idxd_get_wq_portal_full_offset(wq->id, IDXD_PORTAL_LIMITED); wq->dportal = devm_ioremap(dev, start, IDXD_PORTAL_SIZE); if (!wq->dportal)
diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h
index aef5a902829e..54390334c243 100644
--- a/drivers/dma/idxd/registers.h
+++ b/drivers/dma/idxd/registers.h@@ -8,7 +8,7 @@ #define IDXD_MMIO_BAR 0 #define IDXD_WQ_BAR 2 -#define IDXD_PORTAL_SIZE 0x4000 +#define IDXD_PORTAL_SIZE PAGE_SIZE /* MMIO Device BAR0 Registers */ #define IDXD_VER_OFFSET 0x00
diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c
index 156a1ee233aa..417048e3c42a 100644
--- a/drivers/dma/idxd/submit.c
+++ b/drivers/dma/idxd/submit.c@@ -74,7 +74,7 @@ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc) if (idxd->state != IDXD_DEV_ENABLED) return -EIO; - portal = wq->dportal + idxd_get_wq_portal_offset(IDXD_PORTAL_UNLIMITED); + portal = wq->dportal; /* * The wmb() flushes writes to coherent DMA data before possibly * triggering a DMA read. The wmb() is necessary even on UP because