diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/misc/ocxl/mmio.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/misc/ocxl/mmio.c b/drivers/misc/ocxl/mmio.c new file mode 100644 index 000000000..aae713db4 --- /dev/null +++ b/drivers/misc/ocxl/mmio.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0+ +// Copyright 2019 IBM Corp. +#include <linux/sched/mm.h> +#include "trace.h" +#include "ocxl_internal.h" + +int ocxl_global_mmio_read32(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u32 *val) +{ + if (offset > afu->config.global_mmio_size - 4) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + *val = readl_be((char *)afu->global_mmio_ptr + offset); + break; + + default: + *val = readl((char *)afu->global_mmio_ptr + offset); + break; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_read32); + +int ocxl_global_mmio_read64(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u64 *val) +{ + if (offset > afu->config.global_mmio_size - 8) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + *val = readq_be((char *)afu->global_mmio_ptr + offset); + break; + + default: + *val = readq((char *)afu->global_mmio_ptr + offset); + break; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_read64); + +int ocxl_global_mmio_write32(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u32 val) +{ + if (offset > afu->config.global_mmio_size - 4) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + writel_be(val, (char *)afu->global_mmio_ptr + offset); + break; + + default: + writel(val, (char *)afu->global_mmio_ptr + offset); + break; + } + + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_write32); + +int ocxl_global_mmio_write64(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u64 val) +{ + if (offset > afu->config.global_mmio_size - 8) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + writeq_be(val, (char *)afu->global_mmio_ptr + offset); + break; + + default: + writeq(val, (char *)afu->global_mmio_ptr + offset); + break; + } + + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_write64); + +int ocxl_global_mmio_set32(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u32 mask) +{ + u32 tmp; + + if (offset > afu->config.global_mmio_size - 4) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + tmp = readl_be((char *)afu->global_mmio_ptr + offset); + tmp |= mask; + writel_be(tmp, (char *)afu->global_mmio_ptr + offset); + break; + + default: + tmp = readl((char *)afu->global_mmio_ptr + offset); + tmp |= mask; + writel(tmp, (char *)afu->global_mmio_ptr + offset); + break; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_set32); + +int ocxl_global_mmio_set64(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u64 mask) +{ + u64 tmp; + + if (offset > afu->config.global_mmio_size - 8) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + tmp = readq_be((char *)afu->global_mmio_ptr + offset); + tmp |= mask; + writeq_be(tmp, (char *)afu->global_mmio_ptr + offset); + break; + + default: + tmp = readq((char *)afu->global_mmio_ptr + offset); + tmp |= mask; + writeq(tmp, (char *)afu->global_mmio_ptr + offset); + break; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_set64); + +int ocxl_global_mmio_clear32(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u32 mask) +{ + u32 tmp; + + if (offset > afu->config.global_mmio_size - 4) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + tmp = readl_be((char *)afu->global_mmio_ptr + offset); + tmp &= ~mask; + writel_be(tmp, (char *)afu->global_mmio_ptr + offset); + break; + + default: + tmp = readl((char *)afu->global_mmio_ptr + offset); + tmp &= ~mask; + writel(tmp, (char *)afu->global_mmio_ptr + offset); + break; + } + + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear32); + +int ocxl_global_mmio_clear64(struct ocxl_afu *afu, size_t offset, + enum ocxl_endian endian, u64 mask) +{ + u64 tmp; + + if (offset > afu->config.global_mmio_size - 8) + return -EINVAL; + +#ifdef __BIG_ENDIAN__ + if (endian == OCXL_HOST_ENDIAN) + endian = OCXL_BIG_ENDIAN; +#endif + + switch (endian) { + case OCXL_BIG_ENDIAN: + tmp = readq_be((char *)afu->global_mmio_ptr + offset); + tmp &= ~mask; + writeq_be(tmp, (char *)afu->global_mmio_ptr + offset); + break; + + default: + tmp = readq((char *)afu->global_mmio_ptr + offset); + tmp &= ~mask; + writeq(tmp, (char *)afu->global_mmio_ptr + offset); + break; + } + + writeq(tmp, (char *)afu->global_mmio_ptr + offset); + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear64); 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