From: Tudor Ambarus <tudor.ambarus@microchip.com>
To: <vkoul@kernel.org>, <peda@axentia.se>, <du@axentia.se>
Cc: <maciej.sosnowski@intel.com>, <nicolas.ferre@microchip.com>,
<mripard@kernel.org>, <torfl6749@gmail.com>,
<linux-kernel@vger.kernel.org>, <dmaengine@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
"Tudor Ambarus" <tudor.ambarus@microchip.com>
Subject: [PATCH v2 00/32] dmaengine: at_hdmac: Fix concurrency bugs and then convert to virt-dma
Date: Tue, 25 Oct 2022 12:02:34 +0300 [thread overview]
Message-ID: <20221025090306.297886-1-tudor.ambarus@microchip.com> (raw)
v2:
- reorder patches so that fixes come first -> easier to backport to
stable kernels.
- drop the devm_request_irq() patch as we had to disable the irq anyway
in remove() in order to avoid spurios IRQs. Using devm variant brings no
palpable benefit.
- reword pm_ptr commit message
at_hdmac driver had poor list handling and concurrency bugs.
We experienced calling of the completion call twice for the
same descriptor. Peter Rosin encountered the same while
reporting a different bug:
https://lore.kernel.org/lkml/13c6c9a2-6db5-c3bf-349b-4c127ad3496a@axentia.se/
Two sets of tests were performed:
1/ tested just the fixes, to make sure everything is fine and the
concurrency bugs are squashed even without the conversion to virt-dma.
All went fine.
2/ tested the entire series including the conversion the virt-dma
All went fine.
I tested NAND (prep_dma_memcpy), MMC (prep_dma_slave_sg),
usart (cyclic mode), dmatest (memcpy, memset).
With the conversion to virt-dma I replaced the election of a new transfer
in the tasklet with the election of the new transfer in the interrupt
handler. We should have a shorter idle window as we remove the scheduling
latency of the tasklet. Using mtd_speedtest showed similar performances
when using NAND with DMA. That could be because of using a low timming
mode on NAND.
Tudor Ambarus (32):
dmaengine: at_hdmac: Fix at_lli struct definition
dmaengine: at_hdmac: Don't start transactions at tx_submit level
dmaengine: at_hdmac: Start transfer for cyclic channels in
issue_pending
dmaengine: at_hdmac: Fix premature completion of desc in issue_pending
dmaengine: at_hdmac: Do not call the complete callback on
device_terminate_all
dmaengine: at_hdmac: Protect atchan->status with the channel lock
dmaengine: at_hdmac: Fix concurrency problems by removing
atc_complete_all()
dmaengine: at_hdmac: Fix concurrency over descriptor
dmaengine: at_hdmac: Free the memset buf without holding the chan lock
dmaengine: at_hdmac: Fix concurrency over the active list
dmaengine: at_hdmac: Fix descriptor handling when issuing it to
hardware
dmaengine: at_hdmac: Fix completion of unissued descriptor in case of
errors
dmaengine: at_hdmac: Don't allow CPU to reorder channel enable
dmaengine: at_hdmac: Fix impossible condition
dmaengine: at_hdmac: Check return code of dma_async_device_register
dmaengine: at_hdmac: Do not print messages on console while holding
the lock
dmaengine: at_hdmac: Return dma_cookie_status()'s ret code when
txstate is NULL
dmaengine: at_hdmac: Remove superfluous cast
dmaengine: at_hdmac: Pass residue by address to avoid unnecessary
implicit casts
dmaengine: at_hdmac: s/atc_get_bytes_left/atc_get_residue
dmaengine: at_hdmac: Introduce atc_get_llis_residue()
dmaengine: at_hdmac: Use devm_kzalloc() and struct_size()
dmaengine: at_hdmac: Use devm_platform_ioremap_resource
dmaengine: at_hdmac: Use devm_clk_get()
dmaengine: at_hdmac: Use pm_ptr()
dmaengine: at_hdmac: Set include entries in alphabetic order
dmaengine: at_hdmac: Keep register definitions and structures private
to at_hdmac.c
dmaengine: at_hdmac: Use bitfield access macros
dmaengine: at_hdmac: Rename "dma_common" to "dma_device"
dmaengine: at_hdmac: Rename "chan_common" to "dma_chan"
dmaengine: at_hdmac: Remove unused member of at_dma_chan
dmaengine: at_hdmac: Convert driver to use virt-dma
MAINTAINERS | 1 -
drivers/dma/Kconfig | 1 +
drivers/dma/at_hdmac.c | 1899 ++++++++++++++++++-----------------
drivers/dma/at_hdmac_regs.h | 478 ---------
4 files changed, 990 insertions(+), 1389 deletions(-)
delete mode 100644 drivers/dma/at_hdmac_regs.h
--
2.25.1
next reply other threads:[~2022-10-25 9:03 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 9:02 Tudor Ambarus [this message]
2022-10-25 9:02 ` [PATCH v2 01/32] dmaengine: at_hdmac: Fix at_lli struct definition Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 02/32] dmaengine: at_hdmac: Don't start transactions at tx_submit level Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 03/32] dmaengine: at_hdmac: Start transfer for cyclic channels in issue_pending Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 04/32] dmaengine: at_hdmac: Fix premature completion of desc " Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 05/32] dmaengine: at_hdmac: Do not call the complete callback on device_terminate_all Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 06/32] dmaengine: at_hdmac: Protect atchan->status with the channel lock Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 07/32] dmaengine: at_hdmac: Fix concurrency problems by removing atc_complete_all() Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 08/32] dmaengine: at_hdmac: Fix concurrency over descriptor Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 09/32] dmaengine: at_hdmac: Free the memset buf without holding the chan lock Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 10/32] dmaengine: at_hdmac: Fix concurrency over the active list Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 11/32] dmaengine: at_hdmac: Fix descriptor handling when issuing it to hardware Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 12/32] dmaengine: at_hdmac: Fix completion of unissued descriptor in case of errors Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 13/32] dmaengine: at_hdmac: Don't allow CPU to reorder channel enable Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 14/32] dmaengine: at_hdmac: Fix impossible condition Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 15/32] dmaengine: at_hdmac: Check return code of dma_async_device_register Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 16/32] dmaengine: at_hdmac: Do not print messages on console while holding the lock Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 17/32] dmaengine: at_hdmac: Return dma_cookie_status()'s ret code when txstate is NULL Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 18/32] dmaengine: at_hdmac: Remove superfluous cast Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 19/32] dmaengine: at_hdmac: Pass residue by address to avoid unnecessary implicit casts Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 20/32] dmaengine: at_hdmac: s/atc_get_bytes_left/atc_get_residue Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 21/32] dmaengine: at_hdmac: Introduce atc_get_llis_residue() Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 22/32] dmaengine: at_hdmac: Use devm_kzalloc() and struct_size() Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 23/32] dmaengine: at_hdmac: Use devm_platform_ioremap_resource Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 24/32] dmaengine: at_hdmac: Use devm_clk_get() Tudor Ambarus
2022-10-25 9:02 ` [PATCH v2 25/32] dmaengine: at_hdmac: Use pm_ptr() Tudor Ambarus
2022-10-25 9:03 ` [PATCH v2 26/32] dmaengine: at_hdmac: Set include entries in alphabetic order Tudor Ambarus
2022-10-25 9:03 ` [PATCH v2 27/32] dmaengine: at_hdmac: Keep register definitions and structures private to at_hdmac.c Tudor Ambarus
2022-10-25 9:03 ` [PATCH v2 28/32] dmaengine: at_hdmac: Use bitfield access macros Tudor Ambarus
2022-10-25 9:03 ` [PATCH v2 29/32] dmaengine: at_hdmac: Rename "dma_common" to "dma_device" Tudor Ambarus
2022-10-25 9:03 ` [PATCH v2 30/32] dmaengine: at_hdmac: Rename "chan_common" to "dma_chan" Tudor Ambarus
2022-10-25 9:03 ` [PATCH v2 31/32] dmaengine: at_hdmac: Remove unused member of at_dma_chan Tudor Ambarus
2022-10-25 9:03 ` [PATCH v2 32/32] dmaengine: at_hdmac: Convert driver to use virt-dma Tudor Ambarus
2022-10-28 12:55 ` Nicolas Ferre
2022-10-25 9:06 ` [PATCH v2 00/32] dmaengine: at_hdmac: Fix concurrency bugs and then convert to virt-dma Tudor.Ambarus
2022-10-28 13:00 ` Nicolas Ferre
2022-11-04 13:22 ` Vinod Koul
2022-11-04 15:14 ` Tudor.Ambarus
2022-11-04 15:21 ` Tudor.Ambarus
2022-11-04 17:59 ` Vinod Koul
2022-11-07 4:33 ` Vinod Koul
2022-11-07 9:00 ` Tudor.Ambarus
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