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Date: Wed, 15 Jan 2020 14:34:23 +0200
From: Tero Kristo <t-kristo@...com>
To: Suman Anna <s-anna@...com>, <bjorn.andersson@...aro.org>,
<ohad@...ery.com>, <linux-remoteproc@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, <mathieu.poirier@...aro.org>,
<linux-omap@...r.kernel.org>
Subject: Re: [PATCHv4 07/14] remoteproc/omap: Add support for DRA7xx remote
processors
On 08/01/2020 21:39, Suman Anna wrote:
> Hi Tero,
>
> On 1/2/20 7:18 AM, Tero Kristo wrote:
>> From: Suman Anna <s-anna@...com>
>>
>> DRA7xx/AM57xx SoCs have two IPU and up to two DSP processor subsystems
>> for offloading different computation algorithms. The IPU processor
>> subsystem contains dual-core ARM Cortex-M4 processors, and is very
>> similar to those on OMAP5. The DSP processor subsystem is based on
>> the TI's standard TMS320C66x DSP CorePac core.
>>
>> Support has been added to the OMAP remoteproc driver through new
>> DRA7xx specific compatibles for properly probing and booting all
>> the different processor subsystem instances on DRA7xx/AM57xx
>> SoCs - IPU1, IPU2, DSP1 & DSP2. A build dependency with SOC_DRA7XX
>> is added to enable the driver to be built in DRA7xx-only configuration.
>>
>> The DSP boot address programming needed enhancement for DRA7xx as the
>> boot register fields are different on DRA7 compared to OMAP4 and OMAP5
>> SoCs. The register on DRA7xx contains additional fields within the
>> register and the boot address bit-field is right-shifted by 10 bits.
>> The internal memory parsing logic has also been updated to compute
>> the device addresses for the L2 RAM for DSP devices using relative
>> addressing logic, and to parse two additional RAMs at L1 level - L1P
>> and L1D. This allows the remoteproc driver to support loading into
>> these regions for a small subset of firmware images requiring as
>> such. The most common usage would be to use the L1 programmable
>> RAMs as L1 Caches.
>>
>> The firmware lookup logic also has to be adjusted for DRA7xx as
>> there are (can be) more than one instance of both the IPU and DSP
>> remote processors for the first time in OMAP4+ SoCs.
>>
>> Signed-off-by: Suman Anna <s-anna@...com>
>> [t-kristo@...com: moved address translation quirks to pdata]
>> Signed-off-by: Tero Kristo <t-kristo@...com>
>> ---
>> v4:
>> - data format change due to device data changes to mem layout
>>
>> drivers/remoteproc/Kconfig | 2 +-
>> drivers/remoteproc/omap_remoteproc.c | 38 +++++++++++++++++++++++++++-
>> 2 files changed, 38 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
>> index 94afdde4bc9f..d6450d7fcf92 100644
>> --- a/drivers/remoteproc/Kconfig
>> +++ b/drivers/remoteproc/Kconfig
>> @@ -25,7 +25,7 @@ config IMX_REMOTEPROC
>>
>> config OMAP_REMOTEPROC
>> tristate "OMAP remoteproc support"
>> - depends on ARCH_OMAP4 || SOC_OMAP5
>> + depends on ARCH_OMAP4 || SOC_OMAP5 || SOC_DRA7XX
>> depends on OMAP_IOMMU
>> select MAILBOX
>> select OMAP2PLUS_MBOX
>> diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
>> index 8a6dd742a8b1..9140c528c416 100644
>> --- a/drivers/remoteproc/omap_remoteproc.c
>> +++ b/drivers/remoteproc/omap_remoteproc.c
>> @@ -34,10 +34,13 @@
>> * struct omap_rproc_boot_data - boot data structure for the DSP omap rprocs
>> * @syscon: regmap handle for the system control configuration module
>> * @boot_reg: boot register offset within the @syscon regmap
>> + * @boot_reg_shift: bit-field shift required for the boot address value in
>> + * @boot_reg
>> */
>> struct omap_rproc_boot_data {
>> struct regmap *syscon;
>> unsigned int boot_reg;
>> + unsigned int boot_reg_shift;
>> };
>>
>> /**
>> @@ -159,6 +162,8 @@ static int omap_rproc_write_dsp_boot_addr(struct rproc *rproc)
>> struct omap_rproc *oproc = rproc->priv;
>> struct omap_rproc_boot_data *bdata = oproc->boot_data;
>> u32 offset = bdata->boot_reg;
>> + u32 value;
>> + u32 mask;
>>
>> if (rproc->bootaddr & (SZ_1K - 1)) {
>> dev_err(dev, "invalid boot address 0x%x, must be aligned on a 1KB boundary\n",
>> @@ -166,7 +171,10 @@ static int omap_rproc_write_dsp_boot_addr(struct rproc *rproc)
>> return -EINVAL;
>> }
>>
>> - regmap_write(bdata->syscon, offset, rproc->bootaddr);
>> + value = rproc->bootaddr >> bdata->boot_reg_shift;
>> + mask = ~(SZ_1K - 1) >> bdata->boot_reg_shift;
>> +
>> + regmap_update_bits(bdata->syscon, offset, mask, value);
>>
>> return 0;
>> }
>> @@ -296,6 +304,13 @@ static const struct omap_rproc_mem_data ipu_mems[] = {
>> { },
>> };
>>
>> +static const struct omap_rproc_mem_data dra7_dsp_mems[] = {
>> + { .name = "l2ram", .dev_addr = 0x800000 },
>> + { .name = "l1pram", .dev_addr = 0xe00000 },
>> + { .name = "l1dram", .dev_addr = 0xf00000 },
>> + { },
>> +};
>> +
>> static const struct omap_rproc_dev_data omap4_dsp_dev_data = {
>> .device_name = "dsp",
>> };
>> @@ -314,6 +329,16 @@ static const struct omap_rproc_dev_data omap5_ipu_dev_data = {
>> .mems = ipu_mems,
>> };
>>
>> +static const struct omap_rproc_dev_data dra7_dsp_dev_data = {
>> + .device_name = "dsp",
>> + .mems = dra7_dsp_mems,
>> +};
>> +
>> +static const struct omap_rproc_dev_data dra7_ipu_dev_data = {
>> + .device_name = "ipu",
>> + .mems = ipu_mems,
>> +};
>> +
>> static const struct of_device_id omap_rproc_of_match[] = {
>> {
>> .compatible = "ti,omap4-dsp",
>> @@ -331,6 +356,14 @@ static const struct of_device_id omap_rproc_of_match[] = {
>> .compatible = "ti,omap5-ipu",
>> .data = &omap5_ipu_dev_data,
>> },
>> + {
>> + .compatible = "ti,dra7-dsp",
>> + .data = &dra7_dsp_dev_data,
>> + },
>> + {
>> + .compatible = "ti,dra7-ipu",
>> + .data = &dra7_ipu_dev_data,
>> + },
>> {
>> /* end */
>> },
>> @@ -383,6 +416,9 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev,
>> return -EINVAL;
>> }
>>
>> + of_property_read_u32(np, "ti,bootreg-shift",
>> + &oproc->boot_data->boot_reg_shift);
>
> Missing error checks, guess you will have to change this anyway when you
> address Rob's comments.
This one is actually intentional. The only expected failure is missing
the ti,bootreg-shift, but even this is a valid situation; we will just
use bootreg shift value of zero (boot-data is zero initialized.)
-Tero
>
> regards
> Suman
>
>> +
>> return 0;
>> }
>>
>>
>
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