2016-07-04 05:33:07 +02:00
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/*
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* QEMU sPAPR Dynamic DMA windows support
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*
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* Copyright (c) 2015 Alexey Kardashevskiy, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "qemu/error-report.h"
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#include "hw/ppc/spapr.h"
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#include "hw/pci-host/spapr.h"
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#include "trace.h"
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static int spapr_phb_get_active_win_num_cb(Object *child, void *opaque)
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{
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sPAPRTCETable *tcet;
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tcet = (sPAPRTCETable *) object_dynamic_cast(child, TYPE_SPAPR_TCE_TABLE);
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if (tcet && tcet->nb_table) {
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++*(unsigned *)opaque;
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}
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return 0;
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}
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static unsigned spapr_phb_get_active_win_num(sPAPRPHBState *sphb)
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{
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unsigned ret = 0;
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object_child_foreach(OBJECT(sphb), spapr_phb_get_active_win_num_cb, &ret);
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return ret;
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}
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static int spapr_phb_get_free_liobn_cb(Object *child, void *opaque)
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{
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sPAPRTCETable *tcet;
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tcet = (sPAPRTCETable *) object_dynamic_cast(child, TYPE_SPAPR_TCE_TABLE);
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if (tcet && !tcet->nb_table) {
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*(uint32_t *)opaque = tcet->liobn;
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return 1;
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}
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return 0;
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}
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static unsigned spapr_phb_get_free_liobn(sPAPRPHBState *sphb)
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{
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uint32_t liobn = 0;
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object_child_foreach(OBJECT(sphb), spapr_phb_get_free_liobn_cb, &liobn);
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return liobn;
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}
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static uint32_t spapr_page_mask_to_query_mask(uint64_t page_mask)
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{
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int i;
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uint32_t mask = 0;
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const struct { int shift; uint32_t mask; } masks[] = {
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{ 12, RTAS_DDW_PGSIZE_4K },
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{ 16, RTAS_DDW_PGSIZE_64K },
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{ 24, RTAS_DDW_PGSIZE_16M },
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{ 25, RTAS_DDW_PGSIZE_32M },
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{ 26, RTAS_DDW_PGSIZE_64M },
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{ 27, RTAS_DDW_PGSIZE_128M },
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{ 28, RTAS_DDW_PGSIZE_256M },
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{ 34, RTAS_DDW_PGSIZE_16G },
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};
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for (i = 0; i < ARRAY_SIZE(masks); ++i) {
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if (page_mask & (1ULL << masks[i].shift)) {
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mask |= masks[i].mask;
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}
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}
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return mask;
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}
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static void rtas_ibm_query_pe_dma_window(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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sPAPRPHBState *sphb;
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2018-12-14 05:21:22 +01:00
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uint64_t buid;
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2016-07-04 05:33:07 +02:00
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uint32_t avail, addr, pgmask = 0;
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if ((nargs != 3) || (nret != 5)) {
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goto param_error_exit;
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}
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buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
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addr = rtas_ld(args, 0);
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sphb = spapr_pci_find_phb(spapr, buid);
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if (!sphb || !sphb->ddw_enabled) {
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goto param_error_exit;
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}
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/* Translate page mask to LoPAPR format */
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pgmask = spapr_page_mask_to_query_mask(sphb->page_size_mask);
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avail = SPAPR_PCI_DMA_MAX_WINDOWS - spapr_phb_get_active_win_num(sphb);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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rtas_st(rets, 1, avail);
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2018-12-14 05:21:22 +01:00
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rtas_st(rets, 2, 0x80000000); /* The largest window we can possibly have */
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2016-07-04 05:33:07 +02:00
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rtas_st(rets, 3, pgmask);
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rtas_st(rets, 4, 0); /* DMA migration mask, not supported */
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2018-12-14 05:21:22 +01:00
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trace_spapr_iommu_ddw_query(buid, addr, avail, 0x80000000, pgmask);
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2016-07-04 05:33:07 +02:00
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return;
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param_error_exit:
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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}
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static void rtas_ibm_create_pe_dma_window(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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sPAPRPHBState *sphb;
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sPAPRTCETable *tcet = NULL;
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uint32_t addr, page_shift, window_shift, liobn;
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uint64_t buid, win_addr;
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int windows;
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if ((nargs != 5) || (nret != 4)) {
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goto param_error_exit;
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}
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buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
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addr = rtas_ld(args, 0);
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sphb = spapr_pci_find_phb(spapr, buid);
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if (!sphb || !sphb->ddw_enabled) {
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goto param_error_exit;
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}
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page_shift = rtas_ld(args, 3);
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window_shift = rtas_ld(args, 4);
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liobn = spapr_phb_get_free_liobn(sphb);
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windows = spapr_phb_get_active_win_num(sphb);
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if (!(sphb->page_size_mask & (1ULL << page_shift)) ||
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(window_shift < page_shift)) {
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goto param_error_exit;
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}
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if (!liobn || !sphb->ddw_enabled || windows == SPAPR_PCI_DMA_MAX_WINDOWS) {
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goto hw_error_exit;
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}
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tcet = spapr_tce_find_by_liobn(liobn);
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if (!tcet) {
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goto hw_error_exit;
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}
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win_addr = (windows == 0) ? sphb->dma_win_addr : sphb->dma64_win_addr;
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spapr_tce_table_enable(tcet, page_shift, win_addr,
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1ULL << (window_shift - page_shift));
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if (!tcet->nb_table) {
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goto hw_error_exit;
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}
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trace_spapr_iommu_ddw_create(buid, addr, 1ULL << page_shift,
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1ULL << window_shift, tcet->bus_offset, liobn);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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rtas_st(rets, 1, liobn);
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rtas_st(rets, 2, tcet->bus_offset >> 32);
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rtas_st(rets, 3, tcet->bus_offset & ((uint32_t) -1));
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return;
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hw_error_exit:
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rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
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return;
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param_error_exit:
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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}
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static void rtas_ibm_remove_pe_dma_window(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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sPAPRPHBState *sphb;
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sPAPRTCETable *tcet;
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uint32_t liobn;
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if ((nargs != 1) || (nret != 1)) {
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goto param_error_exit;
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}
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liobn = rtas_ld(args, 0);
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tcet = spapr_tce_find_by_liobn(liobn);
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if (!tcet) {
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goto param_error_exit;
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}
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sphb = SPAPR_PCI_HOST_BRIDGE(OBJECT(tcet)->parent);
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if (!sphb || !sphb->ddw_enabled || !tcet->nb_table) {
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goto param_error_exit;
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}
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spapr_tce_table_disable(tcet);
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trace_spapr_iommu_ddw_remove(liobn);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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return;
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param_error_exit:
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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}
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static void rtas_ibm_reset_pe_dma_window(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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sPAPRPHBState *sphb;
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uint64_t buid;
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uint32_t addr;
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if ((nargs != 3) || (nret != 1)) {
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goto param_error_exit;
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}
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buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
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addr = rtas_ld(args, 0);
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sphb = spapr_pci_find_phb(spapr, buid);
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if (!sphb || !sphb->ddw_enabled) {
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goto param_error_exit;
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}
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spapr_phb_dma_reset(sphb);
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trace_spapr_iommu_ddw_reset(buid, addr);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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return;
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param_error_exit:
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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}
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static void spapr_rtas_ddw_init(void)
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{
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spapr_rtas_register(RTAS_IBM_QUERY_PE_DMA_WINDOW,
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"ibm,query-pe-dma-window",
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rtas_ibm_query_pe_dma_window);
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spapr_rtas_register(RTAS_IBM_CREATE_PE_DMA_WINDOW,
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"ibm,create-pe-dma-window",
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rtas_ibm_create_pe_dma_window);
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spapr_rtas_register(RTAS_IBM_REMOVE_PE_DMA_WINDOW,
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"ibm,remove-pe-dma-window",
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rtas_ibm_remove_pe_dma_window);
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spapr_rtas_register(RTAS_IBM_RESET_PE_DMA_WINDOW,
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"ibm,reset-pe-dma-window",
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rtas_ibm_reset_pe_dma_window);
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}
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type_init(spapr_rtas_ddw_init)
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