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[PATCH 02/10] pnv/phb4: Add reset logic to PHB4
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From: |
Saif Abrar |
|
Subject: |
[PATCH 02/10] pnv/phb4: Add reset logic to PHB4 |
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Date: |
Thu, 21 Mar 2024 05:04:14 -0500 |
Add a method to be invoked on QEMU reset.
Also add CFG and PBL core-blocks reset logic using
appropriate bits of PHB_PCIE_CRESET register.
Tested by reading the reset value of a register.
Signed-off-by: Saif Abrar <saif.abrar@linux.vnet.ibm.com>
---
hw/pci-host/pnv_phb4.c | 104 +++++++++++++++++++++++++++-
include/hw/pci-host/pnv_phb4_regs.h | 16 ++++-
tests/qtest/pnv-phb4-test.c | 10 +++
3 files changed, 127 insertions(+), 3 deletions(-)
diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
index 075499d36d..d2e7403b37 100644
--- a/hw/pci-host/pnv_phb4.c
+++ b/hw/pci-host/pnv_phb4.c
@@ -1,7 +1,7 @@
/*
- * QEMU PowerPC PowerNV (POWER9) PHB4 model
+ * QEMU PowerPC PowerNV (POWER10) PHB4 model
*
- * Copyright (c) 2018-2020, IBM Corporation.
+ * Copyright (c) 2018-2024, IBM Corporation.
*
* This code is licensed under the GPL version 2 or later. See the
* COPYING file in the top-level directory.
@@ -22,6 +22,7 @@
#include "hw/qdev-properties.h"
#include "qom/object.h"
#include "trace.h"
+#include "sysemu/reset.h"
#define phb_error(phb, fmt, ...) \
qemu_log_mask(LOG_GUEST_ERROR, "phb4[%d:%d]: " fmt "\n", \
@@ -499,6 +500,86 @@ static void pnv_phb4_update_xsrc(PnvPHB4 *phb)
}
}
+/*
+ * Get the PCI-E capability offset from the root-port
+ */
+static uint32_t get_exp_offset(PnvPHB4 *phb)
+{
+ PCIHostState *pci = PCI_HOST_BRIDGE(phb->phb_base);
+ PCIDevice *pdev;
+ pdev = pci_find_device(pci->bus, 0, 0);
+ if (!pdev) {
+ phb_error(phb, "PCI device not found");
+ return ~0;
+ }
+ PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(pdev);
+ return rpc->exp_offset;
+}
+
+#define RC_CONFIG_WRITE(a, v) pnv_phb4_rc_config_write(phb, a, 4, v);
+
+static void pnv_phb4_cfg_core_reset(PnvPHB4 *phb)
+{
+ /* Zero all registers initially */
+ int i;
+ for (i = PCI_COMMAND ; i < PHB_RC_CONFIG_SIZE ; i += 4) {
+ RC_CONFIG_WRITE(i, 0)
+ }
+
+ RC_CONFIG_WRITE(PCI_COMMAND, 0x100100);
+ RC_CONFIG_WRITE(PCI_CLASS_REVISION, 0x6040000);
+ RC_CONFIG_WRITE(PCI_CACHE_LINE_SIZE, 0x10000);
+ RC_CONFIG_WRITE(PCI_MEMORY_BASE, 0x10);
+ RC_CONFIG_WRITE(PCI_PREF_MEMORY_BASE, 0x10011);
+ RC_CONFIG_WRITE(PCI_CAPABILITY_LIST, 0x40);
+ RC_CONFIG_WRITE(PCI_INTERRUPT_LINE, 0x20000);
+ /* PM Capabilities Register */
+ RC_CONFIG_WRITE(PCI_BRIDGE_CONTROL + PCI_PM_PMC, 0xC8034801);
+
+ uint32_t exp_offset = get_exp_offset(phb);
+ RC_CONFIG_WRITE(exp_offset, 0x420010);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_DEVCAP, 0x8022);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_DEVCTL, 0x140);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_LNKCAP, 0x300105);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_LNKCTL, 0x2010008);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_SLTCTL, 0x2000);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_DEVCAP2, 0x1003F);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_DEVCTL2, 0x20);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_LNKCAP2, 0x80003E);
+ RC_CONFIG_WRITE(exp_offset + PCI_EXP_LNKCTL2, 0x5);
+
+ RC_CONFIG_WRITE(PHB_AER_ECAP, 0x14810001);
+ RC_CONFIG_WRITE(PHB_AER_CAPCTRL, 0xA0);
+ RC_CONFIG_WRITE(PHB_SEC_ECAP, 0x1A010019);
+
+ RC_CONFIG_WRITE(PHB_LMR_ECAP, 0x1E810027);
+ /* LMR - Margining Lane Control / Status Register # 2 to 16 */
+ for (i = PHB_LMR_CTLSTA_2 ; i <= PHB_LMR_CTLSTA_16 ; i += 4) {
+ RC_CONFIG_WRITE(i, 0x9C38);
+ }
+
+ RC_CONFIG_WRITE(PHB_DLF_ECAP, 0x1F410025);
+ RC_CONFIG_WRITE(PHB_DLF_CAP, 0x80000001);
+ RC_CONFIG_WRITE(P16_ECAP, 0x22410026);
+ RC_CONFIG_WRITE(P32_ECAP, 0x1002A);
+ RC_CONFIG_WRITE(P32_CAP, 0x103);
+}
+
+static void pnv_phb4_pbl_core_reset(PnvPHB4 *phb)
+{
+ /* Zero all registers initially */
+ int i;
+ for (i = PHB_PBL_CONTROL ; i <= PHB_PBL_ERR1_STATUS_MASK ; i += 8) {
+ phb->regs[i >> 3] = 0x0;
+ }
+
+ /* Set specific register values */
+ phb->regs[PHB_PBL_CONTROL >> 3] = 0xC009000000000000;
+ phb->regs[PHB_PBL_TIMEOUT_CTRL >> 3] = 0x2020000000000000;
+ phb->regs[PHB_PBL_NPTAG_ENABLE >> 3] = 0xFFFFFFFF00000000;
+ phb->regs[PHB_PBL_SYS_LINK_INIT >> 3] = 0x80088B4642473000;
+}
+
static void pnv_phb4_reg_write(void *opaque, hwaddr off, uint64_t val,
unsigned size)
{
@@ -612,6 +693,16 @@ static void pnv_phb4_reg_write(void *opaque, hwaddr off,
uint64_t val,
pnv_phb4_update_xsrc(phb);
break;
+ /* Reset core blocks */
+ case PHB_PCIE_CRESET:
+ if (val & PHB_PCIE_CRESET_CFG_CORE) {
+ pnv_phb4_cfg_core_reset(phb);
+ }
+ if (val & PHB_PCIE_CRESET_PBL) {
+ pnv_phb4_pbl_core_reset(phb);
+ }
+ break;
+
/* Silent simple writes */
case PHB_ASN_CMPM:
case PHB_CONFIG_ADDRESS:
@@ -1531,6 +1622,13 @@ static void pnv_phb4_xscom_realize(PnvPHB4 *phb)
static PCIIOMMUOps pnv_phb4_iommu_ops = {
.get_address_space = pnv_phb4_dma_iommu,
};
+static void pnv_phb4_reset(void *dev)
+{
+ PnvPHB4 *phb = PNV_PHB4(dev);
+ pnv_phb4_cfg_core_reset(phb);
+ pnv_phb4_pbl_core_reset(phb);
+ phb->regs[PHB_PCIE_CRESET >> 3] = 0xE000000000000000;
+}
static void pnv_phb4_instance_init(Object *obj)
{
@@ -1608,6 +1706,8 @@ static void pnv_phb4_realize(DeviceState *dev, Error
**errp)
phb->qirqs = qemu_allocate_irqs(xive_source_set_irq, xsrc, xsrc->nr_irqs);
pnv_phb4_xscom_realize(phb);
+
+ qemu_register_reset(pnv_phb4_reset, dev);
}
/*
diff --git a/include/hw/pci-host/pnv_phb4_regs.h
b/include/hw/pci-host/pnv_phb4_regs.h
index bea96f4d91..6892e21cc9 100644
--- a/include/hw/pci-host/pnv_phb4_regs.h
+++ b/include/hw/pci-host/pnv_phb4_regs.h
@@ -343,6 +343,18 @@
#define PHB_RC_CONFIG_BASE 0x1000
#define PHB_RC_CONFIG_SIZE 0x800
+#define PHB_AER_ECAP 0x100
+#define PHB_AER_CAPCTRL 0x118
+#define PHB_SEC_ECAP 0x148
+#define PHB_LMR_ECAP 0x1A0
+#define PHB_LMR_CTLSTA_2 0x1AC
+#define PHB_LMR_CTLSTA_16 0x1E4
+#define PHB_DLF_ECAP 0x1E8
+#define PHB_DLF_CAP 0x1EC
+#define P16_ECAP 0x1F4
+#define P32_ECAP 0x224
+#define P32_CAP 0x228
+
/* PHB4 REGB registers */
/* PBL core */
@@ -368,7 +380,7 @@
#define PHB_PCIE_SCR 0x1A00
#define PHB_PCIE_SCR_SLOT_CAP PPC_BIT(15)
#define PHB_PCIE_SCR_MAXLINKSPEED PPC_BITMASK(32, 35)
-
+#define PHB_PCIE_BNR 0x1A08
#define PHB_PCIE_CRESET 0x1A10
#define PHB_PCIE_CRESET_CFG_CORE PPC_BIT(0)
@@ -423,6 +435,8 @@
#define PHB_PCIE_LANE_EQ_CNTL23 0x1B08 /* DD1 only */
#define PHB_PCIE_TRACE_CTRL 0x1B20
#define PHB_PCIE_MISC_STRAP 0x1B30
+#define PHB_PCIE_PHY_RXEQ_STAT_G3_00_03 0x1B40
+#define PHB_PCIE_PHY_RXEQ_STAT_G5_12_15 0x1B98
/* Error */
#define PHB_REGB_ERR_STATUS 0x1C00
diff --git a/tests/qtest/pnv-phb4-test.c b/tests/qtest/pnv-phb4-test.c
index e3b809e9c4..44141462f6 100644
--- a/tests/qtest/pnv-phb4-test.c
+++ b/tests/qtest/pnv-phb4-test.c
@@ -54,6 +54,13 @@ static void phb4_version_test(QTestState *qts)
g_assert_cmpuint(ver, ==, 0xA5);
}
+/* Assert that 'PHB PBL Control' register has correct reset value */
+static void phb4_reset_test(QTestState *qts)
+{
+ g_assert_cmpuint(pnv_phb4_xscom_read(qts, PHB_PBL_CONTROL),
+ ==, 0xC009000000000000);
+}
+
static void test_phb4(void)
{
QTestState *qts = NULL;
@@ -63,6 +70,9 @@ static void test_phb4(void)
/* Make sure test is running on PHB */
phb4_version_test(qts);
+ /* Check reset value of a register */
+ phb4_reset_test(qts);
+
qtest_quit(qts);
}
--
2.39.3
- Re: [PATCH 05/10] pnv/phb4: Implement write-clear and return 1's on unimplemented reg read, (continued)
- [PATCH 09/10] hw/pci: Set write-mask bits for PCIE Link-Control-2 register, Saif Abrar, 2024/03/21
- [PATCH 08/10] pnv/phb4: Implement IODA PCT table, Saif Abrar, 2024/03/21
- [PATCH 01/10] qtest/phb4: Add testbench for PHB4, Saif Abrar, 2024/03/21
- [PATCH 04/10] pnv/phb4: Implement read-only and write-only bits of registers, Saif Abrar, 2024/03/21
- [PATCH 02/10] pnv/phb4: Add reset logic to PHB4,
Saif Abrar <=
- [PATCH 03/10] pnv/phb4: Implement sticky reset logic in PHB4, Saif Abrar, 2024/03/21