drivers/memory/tegra/tegra114.c

Source file repositories/reference/linux-study-clean/drivers/memory/tegra/tegra114.c

File Facts

System
Linux kernel
Corpus path
drivers/memory/tegra/tegra114.c
Extension
.c
Size
23971 bytes
Lines
1323
Domain
Driver Families
Bucket
drivers/memory
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (client->swgroup) {
		case TEGRA_SWGROUP_DC:
		case TEGRA_SWGROUP_DCB:
		case TEGRA_SWGROUP_PTC:
		case TEGRA_SWGROUP_VI:
			/* these clients are isochronous by default */
			ndata->tag = TEGRA_MC_ICC_TAG_ISO;
			break;

		default:
			ndata->tag = TEGRA_MC_ICC_TAG_DEFAULT;
			break;
		}

		return ndata;
	}

	for (i = 0; i < mc->soc->num_clients; i++) {
		if (mc->soc->clients[i].id == idx)
			return ERR_PTR(-EPROBE_DEFER);
	}

	dev_err(mc->dev, "invalid ICC client ID %u\n", idx);

	return ERR_PTR(-EINVAL);
}

static const struct tegra_mc_icc_ops tegra114_mc_icc_ops = {
	.xlate_extended = tegra114_mc_of_icc_xlate_extended,
	.aggregate = tegra114_mc_icc_aggreate,
	.set = tegra114_mc_icc_set,
};

static const unsigned long tegra114_mc_emem_regs[] = {
	MC_EMEM_ARB_CFG,
	MC_EMEM_ARB_OUTSTANDING_REQ,
	MC_EMEM_ARB_TIMING_RCD,
	MC_EMEM_ARB_TIMING_RP,
	MC_EMEM_ARB_TIMING_RC,
	MC_EMEM_ARB_TIMING_RAS,
	MC_EMEM_ARB_TIMING_FAW,
	MC_EMEM_ARB_TIMING_RRD,
	MC_EMEM_ARB_TIMING_RAP2PRE,
	MC_EMEM_ARB_TIMING_WAP2PRE,
	MC_EMEM_ARB_TIMING_R2R,
	MC_EMEM_ARB_TIMING_W2W,
	MC_EMEM_ARB_TIMING_R2W,
	MC_EMEM_ARB_TIMING_W2R,
	MC_EMEM_ARB_DA_TURNS,
	MC_EMEM_ARB_DA_COVERS,
	MC_EMEM_ARB_MISC0,
	MC_EMEM_ARB_RING1_THROTTLE,
};

static const struct tegra_mc_intmask tegra114_mc_intmasks[] = {
	{
		.reg = MC_INTMASK,
		.mask = MC_INT_INVALID_SMMU_PAGE | MC_INT_SECURITY_VIOLATION |
			MC_INT_DECERR_EMEM,
	},
};

const struct tegra_mc_soc tegra114_mc_soc = {
	.clients = tegra114_mc_clients,
	.num_clients = ARRAY_SIZE(tegra114_mc_clients),
	.num_address_bits = 32,
	.atom_size = 32,
	.client_id_mask = 0x7f,
	.smmu = &tegra114_smmu_soc,
	.emem_regs = tegra114_mc_emem_regs,
	.num_emem_regs = ARRAY_SIZE(tegra114_mc_emem_regs),
	.intmasks = tegra114_mc_intmasks,
	.num_intmasks = ARRAY_SIZE(tegra114_mc_intmasks),
	.reset_ops = &tegra_mc_reset_ops_common,
	.resets = tegra114_mc_resets,
	.num_resets = ARRAY_SIZE(tegra114_mc_resets),
	.icc_ops = &tegra114_mc_icc_ops,
	.ops = &tegra30_mc_ops,
	.regs = &tegra20_mc_regs,
	.handle_irq = tegra30_mc_irq_handlers,
	.num_interrupts = ARRAY_SIZE(tegra30_mc_irq_handlers),
	.mc_err_status_type_mask = (0x7 << 28),
};

Annotation

Implementation Notes