159 lines
3.3 KiB
C
159 lines
3.3 KiB
C
// 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:
|
|
return gsi->version >= IPA_VERSION_3_5;
|
|
|
|
case HW_PARAM_2:
|
|
return gsi->version >= IPA_VERSION_3_5_1;
|
|
|
|
case HW_PARAM_4:
|
|
return gsi->version >= IPA_VERSION_5_0;
|
|
|
|
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 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;
|
|
}
|