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Simple PCIe FMC carrier SPEC
Commit e9269043 authored by Federico Vaga's avatar Federico Vaga
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sw:drv: first DMA engine implementation 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent 54892d7f
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Showing with 893 additions and 1 deletion
software/kernel/Kbuild
View file @ e9269043
......@@ -30,6 +30,7 @@ KBUILD_EXTRA_SYMBOLS += $(FMC_ABS)/drivers/fmc/Module.symvers
obj-m := spec-fmc-carrier.o
obj-m += gn412x-gpio.o
obj-m += gn412x-fcl.o
obj-m += spec-gn412x-dma.o
obj-m += spi-ocores.o
spec-fmc-carrier-objs := spec-core.o
......
software/kernel/spec-core-fpga.c
View file @ e9269043
......@@ -258,8 +258,33 @@ static void spec_fpga_vic_exit(struct spec_fpga *spec_fpga)
}
/* DMA engine */
static struct resource spec_fpga_dma_res[] = {
{
.name = "spec-gn412x-dma-mem",
.flags = IORESOURCE_MEM,
.start = SPEC_FPGA_MEM_DMA_START,
.end = SPEC_FPGA_MEM_DMA_END,
}, {
.name = "spec-gn412x-dma-irq-done",
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL,
.start = 0,
.end = 0,
}, {
.name = "spec-gn412x-dma-irq-err",
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL,
.start = 0,
.end = 0,
},
};
static int spec_fpga_dma_init(struct spec_fpga *spec_fpga)
{
struct pci_dev *pcidev = to_pci_dev(spec_fpga->dev.parent);
unsigned long pci_start = pci_resource_start(pcidev, 0);
const unsigned int res_n = ARRAY_SIZE(spec_fpga_dma_res);
struct resource res[ARRAY_SIZE(spec_fpga_dma_res)];
struct platform_device *pdev;
struct irq_domain *vic_domain;
uint32_t ddr_status;
if (!(spec_fpga->meta->cap & SPEC_META_CAP_DMA))
......@@ -272,12 +297,35 @@ static int spec_fpga_dma_init(struct spec_fpga *spec_fpga)
ddr_status);
return -ENODEV;
}
vic_domain = irq_find_host((void *)&spec_fpga->vic_pdev->dev);
if (!vic_domain) {
dev_err(&spec_fpga->dev,
"Failed to load DMA engine: missing can't find VIC.\n");
return -ENODEV;
}
memcpy(&res, spec_fpga_dma_res, sizeof(spec_fpga_dma_res));
res[0].start += pci_start;
res[0].end += pci_start;
res[1].start = irq_find_mapping(vic_domain, SPEC_FPGA_IRQ_DMA_DONE);
res[2].start = irq_find_mapping(vic_domain, SPEC_FPGA_IRQ_DMA_ERROR);
pdev = platform_device_register_resndata(&spec_fpga->dev,
"spec-gn412x-dma",
PLATFORM_DEVID_AUTO,
res, res_n,
NULL, 0);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
spec_fpga->dma_pdev = pdev;
return 0;
}
static void spec_fpga_dma_exit(struct spec_fpga *spec_fpga)
{
if (spec_fpga->dma_pdev) {
platform_device_unregister(spec_fpga->dma_pdev);
spec_fpga->dma_pdev = NULL;
}
}
/* MFD devices */
......
software/kernel/spec-gn412x-dma.c 0 → 100644
View file @ e9269043
This diff is collapsed.
software/kernel/spec.h
View file @ e9269043
......@@ -116,6 +116,7 @@ struct spec_fpga {
void __iomem *fpga;
struct spec_meta_id __iomem *meta;
struct platform_device *vic_pdev;
struct platform_device *dma_pdev;
struct platform_device *app_pdev;
struct fmc_slot_info slot_info;
struct dentry *dbg_dir_fpga;
......
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