diff options
Diffstat (limited to 'drivers/net/ipa/gsi_reg.c')
| -rw-r--r-- | drivers/net/ipa/gsi_reg.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/net/ipa/gsi_reg.c b/drivers/net/ipa/gsi_reg.c new file mode 100644 index 000000000000..1412b67304c8 --- /dev/null +++ b/drivers/net/ipa/gsi_reg.c @@ -0,0 +1,151 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Copyright (C) 2023 Linaro Ltd. */ + +#include <linux/platform_device.h> +#include <linux/io.h> + +#include "gsi.h" +#include "reg.h" +#include "gsi_reg.h" + +/* Is this register ID valid for the current GSI version? */ +static bool gsi_reg_id_valid(struct gsi *gsi, enum gsi_reg_id reg_id) +{ + switch (reg_id) { + case INTER_EE_SRC_CH_IRQ_MSK: + case INTER_EE_SRC_EV_CH_IRQ_MSK: + case CH_C_CNTXT_0: + case CH_C_CNTXT_1: + case CH_C_CNTXT_2: + case CH_C_CNTXT_3: + case CH_C_QOS: + case CH_C_SCRATCH_0: + case CH_C_SCRATCH_1: + case CH_C_SCRATCH_2: + case CH_C_SCRATCH_3: + case EV_CH_E_CNTXT_0: + case EV_CH_E_CNTXT_1: + case EV_CH_E_CNTXT_2: + case EV_CH_E_CNTXT_3: + case EV_CH_E_CNTXT_4: + case EV_CH_E_CNTXT_8: + case EV_CH_E_CNTXT_9: + case EV_CH_E_CNTXT_10: + case EV_CH_E_CNTXT_11: + case EV_CH_E_CNTXT_12: + case EV_CH_E_CNTXT_13: + case EV_CH_E_SCRATCH_0: + case EV_CH_E_SCRATCH_1: + case CH_C_DOORBELL_0: + case EV_CH_E_DOORBELL_0: + case GSI_STATUS: + case CH_CMD: + case EV_CH_CMD: + case GENERIC_CMD: + case HW_PARAM_2: + case CNTXT_TYPE_IRQ: + case CNTXT_TYPE_IRQ_MSK: + case CNTXT_SRC_CH_IRQ: + case CNTXT_SRC_CH_IRQ_MSK: + case CNTXT_SRC_CH_IRQ_CLR: + case CNTXT_SRC_EV_CH_IRQ: + case CNTXT_SRC_EV_CH_IRQ_MSK: + case CNTXT_SRC_EV_CH_IRQ_CLR: + case CNTXT_SRC_IEOB_IRQ: + case CNTXT_SRC_IEOB_IRQ_MSK: + case CNTXT_SRC_IEOB_IRQ_CLR: + case CNTXT_GLOB_IRQ_STTS: + case CNTXT_GLOB_IRQ_EN: + case CNTXT_GLOB_IRQ_CLR: + case CNTXT_GSI_IRQ_STTS: + case CNTXT_GSI_IRQ_EN: + case CNTXT_GSI_IRQ_CLR: + case CNTXT_INTSET: + case ERROR_LOG: + case ERROR_LOG_CLR: + case CNTXT_SCRATCH_0: + return true; + + default: + return false; + } +} + +const struct reg *gsi_reg(struct gsi *gsi, enum gsi_reg_id reg_id) +{ + if (WARN(!gsi_reg_id_valid(gsi, reg_id), "invalid reg %u\n", reg_id)) + return NULL; + + return reg(gsi->regs, reg_id); +} + +static const struct regs *gsi_regs(struct gsi *gsi) +{ + switch (gsi->version) { + case IPA_VERSION_3_1: + return &gsi_regs_v3_1; + + case IPA_VERSION_3_5_1: + return &gsi_regs_v3_5_1; + + case IPA_VERSION_4_2: + return &gsi_regs_v4_0; + + case IPA_VERSION_4_5: + case IPA_VERSION_4_7: + return &gsi_regs_v4_5; + + case IPA_VERSION_4_9: + return &gsi_regs_v4_9; + + case IPA_VERSION_4_11: + return &gsi_regs_v4_11; + + default: + return NULL; + } +} + +/* Sets gsi->virt and I/O maps the "gsi" memory range for registers */ +int gsi_reg_init(struct gsi *gsi, struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + resource_size_t size; + + /* Get GSI memory range and map it */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gsi"); + if (!res) { + dev_err(dev, "DT error getting \"gsi\" memory property\n"); + return -ENODEV; + } + + size = resource_size(res); + if (res->start > U32_MAX || size > U32_MAX - res->start) { + dev_err(dev, "DT memory resource \"gsi\" out of range\n"); + return -EINVAL; + } + + gsi->regs = gsi_regs(gsi); + if (!gsi->regs) { + dev_err(dev, "unsupported IPA version %u (?)\n", gsi->version); + return -EINVAL; + } + + gsi->virt = ioremap(res->start, size); + if (!gsi->virt) { + dev_err(dev, "unable to remap \"gsi\" memory\n"); + return -ENOMEM; + } + + return 0; +} + +/* Inverse of gsi_reg_init() */ +void gsi_reg_exit(struct gsi *gsi) +{ + iounmap(gsi->virt); + gsi->virt = NULL; + gsi->regs = NULL; +} |