From: Todd Poynor <toddpoynor@gmail.com>
To: Rob Springer <rspringer@google.com>,
Ben Chan <benchan@chromium.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
Nick Ewalt <nicholasewalt@google.com>,
Todd Poynor <toddpoynor@google.com>
Subject: [PATCH 04/10] staging: gasket: fix DMA direction for extended page tables
Date: Mon, 17 Sep 2018 05:38:59 -0700 [thread overview]
Message-ID: <20180917123905.213639-5-toddpoynor@gmail.com> (raw)
In-Reply-To: <20180917123905.213639-1-toddpoynor@gmail.com>
From: Nick Ewalt <nicholasewalt@google.com>
Extended page tables should be mapped as DMA_TO_DEVICE, not
bi-directional.
Signed-off-by: Nick Ewalt <nicholasewalt@google.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
drivers/staging/gasket/gasket_page_table.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index 71b77da2e18ca..e86bdc5fc79d2 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -320,7 +320,7 @@ static void gasket_free_extended_subtable(struct gasket_page_table *pg_tbl,
if (pte->dma_addr)
dma_unmap_page(pg_tbl->device, pte->dma_addr, PAGE_SIZE,
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
vfree(pte->sublevel);
@@ -894,7 +894,7 @@ static int gasket_alloc_extended_subtable(struct gasket_page_table *pg_tbl,
/* Map the page into DMA space. */
pte->dma_addr = dma_map_page(pg_tbl->device, pte->page, 0, PAGE_SIZE,
- DMA_BIDIRECTIONAL);
+ DMA_TO_DEVICE);
/* make the addresses available to the device */
dma_addr = (pte->dma_addr + pte->offset) | GASKET_VALID_SLOT_FLAG;
--
2.19.0.397.gdd90340f6a-goog
next prev parent reply other threads:[~2018-09-17 12:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-17 12:38 [PATCH 00/10] staging: gasket: Apex uncloaks, plus fixes Todd Poynor
2018-09-17 12:38 ` [PATCH 01/10] staging: gasket: Kconfig: describe Apex as an Edge TPU device Todd Poynor
2018-09-17 12:38 ` [PATCH 02/10] staging: gasket: interrupt: remove PCI-MSIX-specific status check Todd Poynor
2018-09-17 12:38 ` [PATCH 03/10] staging: gasket: page table: use GFP_KERNEL for dma_alloc_coherent Todd Poynor
2018-09-17 12:38 ` Todd Poynor [this message]
2018-09-17 12:39 ` [PATCH 05/10] staging: gasket: fix data page unmap DMA direction Todd Poynor
2018-09-17 12:39 ` [PATCH 06/10] staging: gasket: page_table: don't unmap coherent pages Todd Poynor
2018-09-17 12:39 ` [PATCH 07/10] staging: gasket: fix gasket_free_coherent_memory metadata frees Todd Poynor
2018-09-17 12:39 ` [PATCH 08/10] staging: gasket: cleanup if dma_map_page fails in gasket_perform_mapping Todd Poynor
2018-09-17 12:39 ` [PATCH 09/10] staging: gasket: page_table: use total_entries for max ext lvl0 page idx Todd Poynor
2018-09-17 12:39 ` [PATCH 10/10] staging: gasket: page_table: handle failed dma_map_page Todd Poynor
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