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// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
/*
* NX unit 842 compression accellerator
*
* Copyright 2015-2019 IBM Corp.
*/
#include <skiboot.h>
#include <chip.h>
#include <xscom.h>
#include <io.h>
#include <cpu.h>
#include <nx.h>
#include <vas.h>
/* Configuration settings */
#define CFG_842_FC_ENABLE (0x1f) /* enable all 842 functions */
#define CFG_842_ENABLE (1) /* enable 842 engines */
#define DMA_CSB_WR NX_DMA_CSB_WR_CI
#define DMA_COMPLETION_MODE NX_DMA_COMPLETION_MODE_CI
#define DMA_CPB_WR NX_DMA_CPB_WR_CI_PAD
#define DMA_OUTPUT_DATA_WR NX_DMA_OUTPUT_DATA_WR_CI
#define EE_1 (1) /* enable engine 842 1 */
#define EE_0 (1) /* enable engine 842 0 */
static int nx_cfg_842(u32 gcid, u64 xcfg)
{
u64 cfg, ci, ct;
int rc, instance = gcid + 1;
BUILD_ASSERT(MAX_CHIPS < NX_842_CFG_CI_MAX);
rc = xscom_read(gcid, xcfg, &cfg);
if (rc) {
prerror("NX%d: ERROR: XSCOM 842 config read failure %d\n",
gcid, rc);
return rc;
}
ct = GETFIELD(NX_842_CFG_CT, cfg);
if (!ct)
prlog(PR_INFO, "NX%d: 842 CT set to %u\n", gcid, NX_CT_842);
else if (ct == NX_CT_842)
prlog(PR_INFO, "NX%d: 842 CT already set to %u\n",
gcid, NX_CT_842);
else
prlog(PR_INFO, "NX%d: 842 CT already set to %u, "
"changing to %u\n", gcid, (unsigned int)ct, NX_CT_842);
ct = NX_CT_842;
cfg = SETFIELD(NX_842_CFG_CT, cfg, ct);
/* Coprocessor Instance must be shifted left.
* See hw doc Section 5.5.1.
*/
ci = GETFIELD(NX_842_CFG_CI, cfg) >> NX_842_CFG_CI_LSHIFT;
if (!ci)
prlog(PR_INFO, "NX%d: 842 CI set to %d\n", gcid, instance);
else if (ci == instance)
prlog(PR_INFO, "NX%d: 842 CI already set to %u\n", gcid,
(unsigned int)ci);
else
prlog(PR_INFO, "NX%d: 842 CI already set to %u, "
"changing to %d\n", gcid, (unsigned int)ci, instance);
ci = instance;
cfg = SETFIELD(NX_842_CFG_CI, cfg, ci << NX_842_CFG_CI_LSHIFT);
/* Enable all functions */
cfg = SETFIELD(NX_842_CFG_FC_ENABLE, cfg, CFG_842_FC_ENABLE);
cfg = SETFIELD(NX_842_CFG_ENABLE, cfg, CFG_842_ENABLE);
rc = xscom_write(gcid, xcfg, cfg);
if (rc)
prerror("NX%d: ERROR: 842 CT %u CI %u config failure %d\n",
gcid, (unsigned int)ct, (unsigned int)ci, rc);
else
prlog(PR_DEBUG, "NX%d: 842 Config 0x%016lx\n",
gcid, (unsigned long)cfg);
return rc;
}
static int nx_cfg_842_umac(struct dt_node *node, u32 gcid, u32 pb_base)
{
int rc;
u64 umac_bar, umac_notify;
struct dt_node *nx_node;
static u32 nx842_tid = 1; /* tid counter within coprocessor type */
nx_node = dt_new(node, "ibm,842-high-fifo");
umac_bar = pb_base + NX_P9_842_HIGH_PRI_RX_FIFO_BAR;
umac_notify = pb_base + NX_P9_842_HIGH_PRI_RX_FIFO_NOTIFY_MATCH;
rc = nx_cfg_rx_fifo(nx_node, "ibm,p9-nx-842", "High", gcid,
NX_CT_842, nx842_tid++, umac_bar,
umac_notify);
if (rc)
return rc;
nx_node = dt_new(node, "ibm,842-normal-fifo");
umac_bar = pb_base + NX_P9_842_NORMAL_PRI_RX_FIFO_BAR;
umac_notify = pb_base + NX_P9_842_NORMAL_PRI_RX_FIFO_NOTIFY_MATCH;
rc = nx_cfg_rx_fifo(nx_node, "ibm,p9-nx-842", "Normal", gcid,
NX_CT_842, nx842_tid++, umac_bar,
umac_notify);
return rc;
}
static int nx_cfg_842_dma(u32 gcid, u64 xcfg)
{
u64 cfg;
int rc;
rc = xscom_read(gcid, xcfg, &cfg);
if (rc) {
prerror("NX%d: ERROR: XSCOM DMA config read failure %d\n",
gcid, rc);
return rc;
}
cfg = SETFIELD(NX_DMA_CFG_842_COMPRESS_PREFETCH, cfg,
DMA_COMPRESS_PREFETCH);
cfg = SETFIELD(NX_DMA_CFG_842_DECOMPRESS_PREFETCH, cfg,
DMA_DECOMPRESS_PREFETCH);
cfg = SETFIELD(NX_DMA_CFG_842_COMPRESS_MAX_RR, cfg,
DMA_COMPRESS_MAX_RR);
cfg = SETFIELD(NX_DMA_CFG_842_DECOMPRESS_MAX_RR, cfg,
DMA_DECOMPRESS_MAX_RR);
cfg = SETFIELD(NX_DMA_CFG_842_SPBC, cfg,
DMA_SPBC);
if (proc_gen < proc_gen_p9) {
cfg = SETFIELD(NX_DMA_CFG_842_CSB_WR, cfg,
DMA_CSB_WR);
cfg = SETFIELD(NX_DMA_CFG_842_COMPLETION_MODE, cfg,
DMA_COMPLETION_MODE);
cfg = SETFIELD(NX_DMA_CFG_842_CPB_WR, cfg,
DMA_CPB_WR);
cfg = SETFIELD(NX_DMA_CFG_842_OUTPUT_DATA_WR, cfg,
DMA_OUTPUT_DATA_WR);
}
rc = xscom_write(gcid, xcfg, cfg);
if (rc)
prerror("NX%d: ERROR: DMA config failure %d\n", gcid, rc);
else
prlog(PR_DEBUG, "NX%d: DMA 0x%016lx\n", gcid,
(unsigned long)cfg);
return rc;
}
static int nx_cfg_842_ee(u32 gcid, u64 xcfg)
{
u64 cfg;
int rc;
rc = xscom_read(gcid, xcfg, &cfg);
if (rc) {
prerror("NX%d: ERROR: XSCOM EE config read failure %d\n",
gcid, rc);
return rc;
}
cfg = SETFIELD(NX_EE_CFG_CH1, cfg, EE_1);
cfg = SETFIELD(NX_EE_CFG_CH0, cfg, EE_0);
rc = xscom_write(gcid, xcfg, cfg);
if (rc)
prerror("NX%d: ERROR: Engine Enable failure %d\n", gcid, rc);
else
prlog(PR_DEBUG, "NX%d: Engine Enable 0x%016lx\n",
gcid, (unsigned long)cfg);
return rc;
}
void nx_enable_842(struct dt_node *node, u32 gcid, u32 pb_base)
{
u64 cfg_dma, cfg_842, cfg_ee;
int rc;
if (dt_node_is_compatible(node, "ibm,power8-nx")) {
cfg_dma = pb_base + NX_P8_DMA_CFG;
cfg_842 = pb_base + NX_P8_842_CFG;
cfg_ee = pb_base + NX_P8_EE_CFG;
} else {
prerror("NX%d: ERROR: Unknown NX type!\n", gcid);
return;
}
rc = nx_cfg_842_dma(gcid, cfg_dma);
if (rc)
return;
rc = nx_cfg_842(gcid, cfg_842);
if (rc)
return;
rc = nx_cfg_842_ee(gcid, cfg_ee);
if (rc)
return;
prlog(PR_INFO, "NX%d: 842 Coprocessor Enabled\n", gcid);
dt_add_property_cells(node, "ibm,842-coprocessor-type", NX_CT_842);
dt_add_property_cells(node, "ibm,842-coprocessor-instance", gcid + 1);
}
void p9_nx_enable_842(struct dt_node *node, u32 gcid, u32 pb_base)
{
u64 cfg_dma, cfg_ee;
int rc;
cfg_dma = pb_base + NX_P9_DMA_CFG;
cfg_ee = pb_base + NX_P9_EE_CFG;
rc = nx_cfg_842_dma(gcid, cfg_dma);
if (rc)
return;
rc = nx_cfg_842_umac(node, gcid, pb_base);
if (rc)
return;
rc = nx_cfg_842_ee(gcid, cfg_ee);
if (rc)
return;
prlog(PR_INFO, "NX%d: 842 Coprocessor Enabled\n", gcid);
}
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