From 8326be9f1c0bb498baf134878a8deb8a952e0135 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Wed, 11 Nov 2020 15:23:46 -0700 Subject: [PATCH] dmaengine: idxd: fix mapping of portal size 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 Link: https://lore.kernel.org/r/160513342642.510187.16450549281618747065.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul --- 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 506ac85..6633449 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 aef5a90..5439033 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 156a1ee..417048e3 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 -- 2.7.4