From: Tero Kristo <t-kristo@ti.com>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: <ohad@wizery.com>, <linux-remoteproc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>,
<s-anna@ti.com>
Subject: Re: [PATCH 06/17] remoteproc/omap: Add the rproc ops .da_to_va() implementation
Date: Tue, 12 Nov 2019 10:22:39 +0200 [thread overview]
Message-ID: <9670e8ad-4c36-2ad1-5967-931b0fc97343@ti.com> (raw)
In-Reply-To: <20191111232251.GH3108315@builder>
On 12/11/2019 01:22, Bjorn Andersson wrote:
> On Mon 28 Oct 05:42 PDT 2019, Tero Kristo wrote:
>
>> From: Suman Anna <s-anna@ti.com>
>>
>> An implementation for the rproc ops .da_to_va() has been added
>> that provides the address translation between device addresses
>> to kernel virtual addresses for internal RAMs present on that
>> particular remote processor device. The implementation provides
>> the translations based on the addresses parsed and stored during
>> the probe.
>>
>> This ops gets invoked by the exported rproc_da_to_va() function
>> and allows the remoteproc core's ELF loader to be able to load
>> program data directly into the internal memories.
>>
>> Signed-off-by: Suman Anna <s-anna@ti.com>
>> Signed-off-by: Tero Kristo <t-kristo@ti.com>
>> ---
>> drivers/remoteproc/omap_remoteproc.c | 35 ++++++++++++++++++++++++++++
>> 1 file changed, 35 insertions(+)
>>
>> diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
>> index bbd6ff360e10..0524f7e0ffa4 100644
>> --- a/drivers/remoteproc/omap_remoteproc.c
>> +++ b/drivers/remoteproc/omap_remoteproc.c
>> @@ -230,10 +230,45 @@ static int omap_rproc_stop(struct rproc *rproc)
>> return 0;
>> }
>>
>> +/*
>> + * Internal Memory translation helper
>
> Please format this as kerneldoc.
>
>> + *
>> + * Custom function implementing the rproc .da_to_va ops to provide address
>> + * translation (device address to kernel virtual address) for internal RAMs
>> + * present in a DSP or IPU device). The translated addresses can be used
>> + * either by the remoteproc core for loading, or by any rpmsg bus drivers.
>> + */
>> +static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
>> +{
>> + struct omap_rproc *oproc = rproc->priv;
>> + void *va = NULL;
>> + int i;
>> + u32 offset;
>> +
>> + if (len <= 0)
>> + return NULL;
>> +
>> + if (!oproc->num_mems)
>> + return NULL;
>> +
>> + for (i = 0; i < oproc->num_mems; i++) {
>> + if (da >= oproc->mem[i].dev_addr && da + len <=
>> + oproc->mem[i].dev_addr + oproc->mem[i].size) {
>> + offset = da - oproc->mem[i].dev_addr;
>> + /* __force to make sparse happy with type conversion */
>> + va = (__force void *)(oproc->mem[i].cpu_addr + offset);
>
> Replace va = and break; with just a return here.
Right, va seems to be completely redundant local variable.
>
>> + break;
>> + }
>> + }
>> +
>> + return va;
>
> return NULL here.
Yep will do.
-Tero
--
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
next prev parent reply other threads:[~2019-11-12 8:22 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-28 12:42 [PATCH 00/17] remoteproc: omap changes on top of v5.4-rc1 Tero Kristo
2019-10-28 12:42 ` [PATCH 01/17] dt-bindings: remoteproc: Add OMAP remoteproc bindings Tero Kristo
2019-11-06 3:27 ` Rob Herring
2019-11-06 12:44 ` Tero Kristo
2019-11-06 13:27 ` Rob Herring
2019-11-06 13:50 ` Tero Kristo
2019-11-07 14:05 ` [PATCHv2 " Tero Kristo
2019-11-13 14:25 ` Rob Herring
2019-10-28 12:42 ` [PATCH 02/17] remoteproc/omap: Switch to SPDX license identifiers Tero Kristo
2019-11-09 1:03 ` Bjorn Andersson
2019-11-12 8:16 ` Tero Kristo
2019-12-20 3:30 ` Suman Anna
2019-10-28 12:42 ` [PATCH 03/17] remoteproc/omap: Add device tree support Tero Kristo
2019-11-11 23:16 ` Bjorn Andersson
2019-11-12 8:14 ` Tero Kristo
2019-10-28 12:42 ` [PATCH 04/17] remoteproc/omap: Add a sanity check for DSP boot address alignment Tero Kristo
2019-11-11 23:18 ` Bjorn Andersson
2019-10-28 12:42 ` [PATCH 05/17] remoteproc/omap: Add support to parse internal memories from DT Tero Kristo
2019-11-11 23:21 ` Bjorn Andersson
2019-11-12 8:21 ` Tero Kristo
2019-10-28 12:42 ` [PATCH 06/17] remoteproc/omap: Add the rproc ops .da_to_va() implementation Tero Kristo
2019-11-11 23:22 ` Bjorn Andersson
2019-11-12 8:22 ` Tero Kristo [this message]
2019-10-28 12:42 ` [PATCH 07/17] remoteproc/omap: Initialize and assign reserved memory node Tero Kristo
2019-11-11 23:23 ` Bjorn Andersson
2019-10-28 12:42 ` [PATCH 08/17] remoteproc/omap: Add support for DRA7xx remote processors Tero Kristo
2019-11-11 23:37 ` Bjorn Andersson
2019-11-12 8:37 ` Tero Kristo
2019-11-12 18:13 ` Bjorn Andersson
2019-11-13 8:08 ` Tero Kristo
2019-10-28 12:42 ` [PATCH 09/17] remoteproc/omap: Remove the unused fields from platform data Tero Kristo
2019-11-11 23:37 ` Bjorn Andersson
2019-10-28 12:42 ` [PATCH 10/17] remoteproc/omap: Remove the omap_rproc_reserve_cma declaration Tero Kristo
2019-11-11 23:37 ` Bjorn Andersson
2019-10-28 12:42 ` [PATCH 11/17] remoteproc/omap: Check for undefined mailbox messages Tero Kristo
2019-11-11 23:39 ` Bjorn Andersson
2019-11-12 8:38 ` Tero Kristo
2019-10-28 12:42 ` [PATCH 12/17] remoteproc/omap: Request a timer(s) for remoteproc usage Tero Kristo
2019-11-12 4:13 ` Bjorn Andersson
2019-11-12 8:42 ` Tero Kristo
2019-10-28 12:42 ` [PATCH 13/17] remoteproc/omap: add support for system suspend/resume Tero Kristo
2019-11-12 6:15 ` Bjorn Andersson
2019-11-12 8:45 ` Tero Kristo
2019-11-12 18:06 ` Bjorn Andersson
2019-10-28 12:42 ` [PATCH 14/17] remoteproc/omap: add support for runtime auto-suspend/resume Tero Kristo
2019-10-28 12:42 ` [PATCH 15/17] remoteproc/omap: report device exceptions and trigger recovery Tero Kristo
2019-11-12 6:26 ` Bjorn Andersson
2019-11-12 8:46 ` Tero Kristo
2019-10-28 12:42 ` [PATCH 16/17] remoteproc/omap: add watchdog functionality for remote processors Tero Kristo
2019-10-28 12:42 ` [PATCH 17/17] remoteproc/omap: fix auto-suspend failure warning during crashed state Tero Kristo
2019-11-12 6:28 ` Bjorn Andersson
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