mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7e462c2a8a
External drivers that communicate via OpenCAPI will need to make MMIO calls to interact with the devices. Signed-off-by: Alastair D'Silva <alastair@d-silva.org> Reviewed-by: Greg Kurz <groug@kaod.org> Acked-by: Frederic Barrat <fbarrat@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
235 lines
4.8 KiB
C
235 lines
4.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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// Copyright 2019 IBM Corp.
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#include <linux/sched/mm.h>
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#include "trace.h"
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#include "ocxl_internal.h"
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int ocxl_global_mmio_read32(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u32 *val)
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{
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if (offset > afu->config.global_mmio_size - 4)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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*val = readl_be((char *)afu->global_mmio_ptr + offset);
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break;
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default:
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*val = readl((char *)afu->global_mmio_ptr + offset);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_read32);
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int ocxl_global_mmio_read64(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u64 *val)
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{
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if (offset > afu->config.global_mmio_size - 8)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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*val = readq_be((char *)afu->global_mmio_ptr + offset);
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break;
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default:
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*val = readq((char *)afu->global_mmio_ptr + offset);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_read64);
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int ocxl_global_mmio_write32(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u32 val)
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{
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if (offset > afu->config.global_mmio_size - 4)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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writel_be(val, (char *)afu->global_mmio_ptr + offset);
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break;
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default:
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writel(val, (char *)afu->global_mmio_ptr + offset);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_write32);
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int ocxl_global_mmio_write64(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u64 val)
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{
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if (offset > afu->config.global_mmio_size - 8)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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writeq_be(val, (char *)afu->global_mmio_ptr + offset);
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break;
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default:
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writeq(val, (char *)afu->global_mmio_ptr + offset);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_write64);
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int ocxl_global_mmio_set32(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u32 mask)
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{
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u32 tmp;
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if (offset > afu->config.global_mmio_size - 4)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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tmp = readl_be((char *)afu->global_mmio_ptr + offset);
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tmp |= mask;
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writel_be(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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default:
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tmp = readl((char *)afu->global_mmio_ptr + offset);
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tmp |= mask;
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writel(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_set32);
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int ocxl_global_mmio_set64(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u64 mask)
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{
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u64 tmp;
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if (offset > afu->config.global_mmio_size - 8)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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tmp = readq_be((char *)afu->global_mmio_ptr + offset);
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tmp |= mask;
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writeq_be(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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default:
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tmp = readq((char *)afu->global_mmio_ptr + offset);
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tmp |= mask;
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writeq(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_set64);
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int ocxl_global_mmio_clear32(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u32 mask)
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{
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u32 tmp;
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if (offset > afu->config.global_mmio_size - 4)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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tmp = readl_be((char *)afu->global_mmio_ptr + offset);
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tmp &= ~mask;
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writel_be(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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default:
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tmp = readl((char *)afu->global_mmio_ptr + offset);
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tmp &= ~mask;
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writel(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear32);
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int ocxl_global_mmio_clear64(struct ocxl_afu *afu, size_t offset,
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enum ocxl_endian endian, u64 mask)
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{
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u64 tmp;
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if (offset > afu->config.global_mmio_size - 8)
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return -EINVAL;
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#ifdef __BIG_ENDIAN__
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if (endian == OCXL_HOST_ENDIAN)
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endian = OCXL_BIG_ENDIAN;
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#endif
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switch (endian) {
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case OCXL_BIG_ENDIAN:
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tmp = readq_be((char *)afu->global_mmio_ptr + offset);
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tmp &= ~mask;
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writeq_be(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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default:
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tmp = readq((char *)afu->global_mmio_ptr + offset);
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tmp &= ~mask;
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writeq(tmp, (char *)afu->global_mmio_ptr + offset);
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break;
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}
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writeq(tmp, (char *)afu->global_mmio_ptr + offset);
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return 0;
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}
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EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear64);
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