Messages in this thread Patch in this message | | | Subject | Re: [PATCH 08/17] remoteproc/omap: Add support for DRA7xx remote processors | From | Tero Kristo <> | Date | Tue, 12 Nov 2019 10:37:57 +0200 |
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On 12/11/2019 01:37, Bjorn Andersson wrote: > On Mon 28 Oct 05:42 PDT 2019, Tero Kristo wrote: > >> From: Suman Anna <s-anna@ti.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 the >> 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. >> >> The names for the firmware images are fixed for each processor and >> are expected to be as follows: >> IPU1: dra7-ipu1-fw.xem4 >> IPU2: dra7-ipu2-fw.xem4 >> DSP1: dra7-dsp1-fw.xe66 >> DSP2: dra7-dsp2-fw.xe66 >> >> Signed-off-by: Suman Anna <s-anna@ti.com> >> [t-kristo@ti.com: fixed l4_offset calculation logic] >> Signed-off-by: Tero Kristo <t-kristo@ti.com> >> --- >> drivers/remoteproc/Kconfig | 2 +- >> drivers/remoteproc/omap_remoteproc.c | 103 ++++++++++++++++++++++++--- >> 2 files changed, 96 insertions(+), 9 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 0b80570effee..e46bb4c790d7 100644 >> --- a/drivers/remoteproc/omap_remoteproc.c >> +++ b/drivers/remoteproc/omap_remoteproc.c >> @@ -17,6 +17,7 @@ >> #include <linux/module.h> >> #include <linux/err.h> >> #include <linux/of_device.h> >> +#include <linux/of_address.h> >> #include <linux/of_reserved_mem.h> >> #include <linux/platform_device.h> >> #include <linux/dma-mapping.h> >> @@ -30,16 +31,20 @@ >> #include "omap_remoteproc.h" >> #include "remoteproc_internal.h" >> >> +#define OMAP_RPROC_DSP_LOCAL_MEM_OFFSET (0x00800000) >> #define OMAP_RPROC_IPU_L2RAM_DEV_ADDR (0x20000000) >> >> /** >> * 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; >> }; >> >> /* >> @@ -151,14 +156,19 @@ 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; >> + unsigned int value = rproc->bootaddr; >> + unsigned int mask = ~(SZ_1K - 1); >> >> - if (rproc->bootaddr & (SZ_1K - 1)) { >> + if (value & (SZ_1K - 1)) { > > I would prefer if you keep this as it was. > >> dev_err(dev, "invalid boot address 0x%x, must be aligned on a 1KB boundary\n", >> - rproc->bootaddr); >> + value); > > Ditto. > >> return -EINVAL; >> } >> >> - regmap_write(bdata->syscon, offset, rproc->bootaddr); >> + value >>= bdata->boot_reg_shift; >> + mask >>= bdata->boot_reg_shift; > > And then > > value = rproc->bootaddr >> bdata->boot_reg_shift; > mask = ~((SZ_1K - 1) >> bdata->boot_reg_shift); > > Note though that this would make the upper boot_reg_shift bits 1, while > in your case they are 0s.
Ok let me revamp this a bit.
> >> + >> + regmap_update_bits(bdata->syscon, offset, mask, value); >> >> return 0; >> } >> @@ -292,6 +302,28 @@ static const struct omap_rproc_dev_data omap5_ipu_dev_data = { >> .fw_name = "omap5-ipu-fw.xem4", >> }; >> >> +static const struct omap_rproc_dev_data dra7_rproc_dev_data[] = { >> + { >> + .device_name = "40800000.dsp", >> + .fw_name = "dra7-dsp1-fw.xe66", >> + }, >> + { >> + .device_name = "41000000.dsp", >> + .fw_name = "dra7-dsp2-fw.xe66", >> + }, >> + { >> + .device_name = "55020000.ipu", >> + .fw_name = "dra7-ipu2-fw.xem4", >> + }, >> + { >> + .device_name = "58820000.ipu", >> + .fw_name = "dra7-ipu1-fw.xem4", >> + }, >> + { >> + /* sentinel */ >> + }, >> +}; >> + >> static const struct of_device_id omap_rproc_of_match[] = { >> { >> .compatible = "ti,omap4-dsp", >> @@ -309,6 +341,14 @@ 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_rproc_dev_data, >> + }, >> + { >> + .compatible = "ti,dra7-ipu", >> + .data = dra7_rproc_dev_data, >> + }, >> { >> /* end */ >> }, >> @@ -317,13 +357,23 @@ MODULE_DEVICE_TABLE(of, omap_rproc_of_match); >> >> static const char *omap_rproc_get_firmware(struct platform_device *pdev) >> { >> + struct device_node *np = pdev->dev.of_node; >> const struct omap_rproc_dev_data *data; >> >> data = of_device_get_match_data(&pdev->dev); >> if (!data) >> return ERR_PTR(-ENODEV); >> >> - return data->fw_name; >> + if (!of_device_is_compatible(np, "ti,dra7-dsp") && >> + !of_device_is_compatible(np, "ti,dra7-ipu")) >> + return data->fw_name; >> + >> + for (; data && data->device_name; data++) { >> + if (!strcmp(dev_name(&pdev->dev), data->device_name)) > > I don't fancy the reliance on node names in devicetree, is this well > defined in the binding?
I don't think it is.... So, would it be better to just replace the compatible strings for dra7 remoteprocs to be like ti,dra7-dsp1 / ti,dra7-dsp2 etc.? I think that would clean up the code also quite a bit.
> >> + return data->fw_name; >> + } >> + >> + return ERR_PTR(-ENOENT); >> } >> >> static int omap_rproc_get_boot_data(struct platform_device *pdev, >> @@ -334,7 +384,8 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev, >> int ret; >> >> if (!of_device_is_compatible(np, "ti,omap4-dsp") && >> - !of_device_is_compatible(np, "ti,omap5-dsp")) >> + !of_device_is_compatible(np, "ti,omap5-dsp") && >> + !of_device_is_compatible(np, "ti,dra7-dsp")) >> return 0; >> >> oproc->boot_data = devm_kzalloc(&pdev->dev, sizeof(*oproc->boot_data), >> @@ -360,18 +411,27 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev, >> return -EINVAL; >> } >> >> + if (of_device_is_compatible(np, "ti,dra7-dsp")) >> + oproc->boot_data->boot_reg_shift = 10; > > Put this in omap_rproc_dev_data.
Yeah.
> >> + >> return 0; >> } >> >> static int omap_rproc_of_get_internal_memories(struct platform_device *pdev, >> struct rproc *rproc) >> { >> - static const char * const mem_names[] = {"l2ram"}; >> + static const char * const ipu_mem_names[] = {"l2ram"}; >> + static const char * const dra7_dsp_mem_names[] = {"l2ram", "l1pram", >> + "l1dram"}; >> struct device_node *np = pdev->dev.of_node; >> struct omap_rproc *oproc = rproc->priv; >> struct device *dev = &pdev->dev; >> + const char * const *mem_names; >> struct resource *res; >> int num_mems; >> + const __be32 *addrp; >> + u32 l4_offset = 0; >> + u64 size; >> int i; >> >> /* OMAP4 and OMAP5 DSPs do not have support for flat SRAM */ >> @@ -379,7 +439,15 @@ static int omap_rproc_of_get_internal_memories(struct platform_device *pdev, >> of_device_is_compatible(np, "ti,omap5-dsp")) >> return 0; >> >> - num_mems = ARRAY_SIZE(mem_names); >> + /* DRA7 DSPs have two additional SRAMs at L1 level */ >> + if (of_device_is_compatible(np, "ti,dra7-dsp")) { >> + mem_names = dra7_dsp_mem_names; >> + num_mems = ARRAY_SIZE(dra7_dsp_mem_names); >> + } else { >> + mem_names = ipu_mem_names; >> + num_mems = ARRAY_SIZE(ipu_mem_names); >> + } >> + >> oproc->mem = devm_kcalloc(dev, num_mems, sizeof(*oproc->mem), >> GFP_KERNEL); >> if (!oproc->mem) >> @@ -395,7 +463,26 @@ static int omap_rproc_of_get_internal_memories(struct platform_device *pdev, >> return PTR_ERR(oproc->mem[i].cpu_addr); >> } >> oproc->mem[i].bus_addr = res->start; >> - oproc->mem[i].dev_addr = OMAP_RPROC_IPU_L2RAM_DEV_ADDR; >> + >> + /* >> + * The DSPs have the internal memories starting at a fixed >> + * offset of 0x800000 from address 0, and this corresponds to >> + * L2RAM. The L3 address view has the L2RAM bus address as the >> + * starting address for the IP, so the L2RAM memory region needs >> + * to be processed first, and the device addresses for each >> + * memory region can be computed using the relative offset >> + * from this base address. >> + */ >> + if (of_device_is_compatible(np, "ti,dra7-dsp") && > > Please don't use a ternary operator repeatedly, it makes the code hard > to follow.
Yeah this parts looks somewhat messy, let me try to fix that.
-Tero
> > Regards, > Bjorn > >> + !strcmp(mem_names[i], "l2ram")) { >> + addrp = of_get_address(dev->of_node, i, &size, NULL); >> + l4_offset = of_translate_address(dev->of_node, addrp); >> + } >> + oproc->mem[i].dev_addr = >> + of_device_is_compatible(np, "ti,dra7-dsp") ? >> + res->start - l4_offset + >> + OMAP_RPROC_DSP_LOCAL_MEM_OFFSET : >> + OMAP_RPROC_IPU_L2RAM_DEV_ADDR; >> oproc->mem[i].size = resource_size(res); >> >> dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %p da 0x%x\n", >> -- >> 2.17.1 >> >> --
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