From: Tomasz Jeznach <tjezn...@rivosinc.com>
Add PCIe Address Translation Services (ATS) capabilities to the IOMMU.
This will add support for ATS translation requests in Fault/Event
queues, Page-request queue and IOATC invalidations.
Signed-off-by: Tomasz Jeznach <tjezn...@rivosinc.com>
Signed-off-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com>
---
hw/riscv/riscv-iommu-bits.h | 43 ++++++++++++++-
hw/riscv/riscv-iommu.c | 107 +++++++++++++++++++++++++++++++++---
hw/riscv/riscv-iommu.h | 1 +
hw/riscv/trace-events | 3 +
4 files changed, 145 insertions(+), 9 deletions(-)
diff --git a/hw/riscv/riscv-iommu-bits.h b/hw/riscv/riscv-iommu-bits.h
index 9d645d69ea..0994f5ce48 100644
--- a/hw/riscv/riscv-iommu-bits.h
+++ b/hw/riscv/riscv-iommu-bits.h
@@ -81,6 +81,7 @@ struct riscv_iommu_pq_record {
#define RISCV_IOMMU_CAP_SV57X4 BIT_ULL(19)
#define RISCV_IOMMU_CAP_MSI_FLAT BIT_ULL(22)
#define RISCV_IOMMU_CAP_MSI_MRIF BIT_ULL(23)
+#define RISCV_IOMMU_CAP_ATS BIT_ULL(25)
#define RISCV_IOMMU_CAP_IGS GENMASK_ULL(29, 28)
#define RISCV_IOMMU_CAP_PAS GENMASK_ULL(37, 32)
#define RISCV_IOMMU_CAP_PD8 BIT_ULL(38)
@@ -201,6 +202,7 @@ struct riscv_iommu_dc {
/* Translation control fields */
#define RISCV_IOMMU_DC_TC_V BIT_ULL(0)
+#define RISCV_IOMMU_DC_TC_EN_ATS BIT_ULL(1)
#define RISCV_IOMMU_DC_TC_DTF BIT_ULL(4)
#define RISCV_IOMMU_DC_TC_PDTV BIT_ULL(5)
#define RISCV_IOMMU_DC_TC_PRPR BIT_ULL(6)
@@ -259,6 +261,20 @@ struct riscv_iommu_command {
#define RISCV_IOMMU_CMD_IODIR_DV BIT_ULL(33)
#define RISCV_IOMMU_CMD_IODIR_DID GENMASK_ULL(63, 40)
+/* 3.1.4 I/O MMU PCIe ATS */
+#define RISCV_IOMMU_CMD_ATS_OPCODE 4
+#define RISCV_IOMMU_CMD_ATS_FUNC_INVAL 0
+#define RISCV_IOMMU_CMD_ATS_FUNC_PRGR 1
+#define RISCV_IOMMU_CMD_ATS_PID GENMASK_ULL(31, 12)
+#define RISCV_IOMMU_CMD_ATS_PV BIT_ULL(32)
+#define RISCV_IOMMU_CMD_ATS_DSV BIT_ULL(33)
+#define RISCV_IOMMU_CMD_ATS_RID GENMASK_ULL(55, 40)
+#define RISCV_IOMMU_CMD_ATS_DSEG GENMASK_ULL(63, 56)
+/* dword1 is the ATS payload, two different payload types for INVAL and PRGR */
+
+/* ATS.PRGR payload */
+#define RISCV_IOMMU_CMD_ATS_PRGR_RESP_CODE GENMASK_ULL(47, 44)
+
enum riscv_iommu_dc_fsc_atp_modes {
RISCV_IOMMU_DC_FSC_MODE_BARE = 0,
RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV32 = 8,
@@ -322,7 +338,32 @@ enum riscv_iommu_fq_ttypes {
RISCV_IOMMU_FQ_TTYPE_TADDR_INST_FETCH = 5,
RISCV_IOMMU_FQ_TTYPE_TADDR_RD = 6,
RISCV_IOMMU_FQ_TTYPE_TADDR_WR = 7,
- RISCV_IOMMU_FW_TTYPE_PCIE_MSG_REQ = 8,
+ RISCV_IOMMU_FQ_TTYPE_PCIE_ATS_REQ = 8,
+ RISCV_IOMMU_FW_TTYPE_PCIE_MSG_REQ = 9,
+};
+
+/* Header fields */
+#define RISCV_IOMMU_PREQ_HDR_PID GENMASK_ULL(31, 12)
+#define RISCV_IOMMU_PREQ_HDR_PV BIT_ULL(32)
+#define RISCV_IOMMU_PREQ_HDR_PRIV BIT_ULL(33)
+#define RISCV_IOMMU_PREQ_HDR_EXEC BIT_ULL(34)
+#define RISCV_IOMMU_PREQ_HDR_DID GENMASK_ULL(63, 40)
+
+/* Payload fields */
+#define RISCV_IOMMU_PREQ_PAYLOAD_R BIT_ULL(0)
+#define RISCV_IOMMU_PREQ_PAYLOAD_W BIT_ULL(1)
+#define RISCV_IOMMU_PREQ_PAYLOAD_L BIT_ULL(2)
+#define RISCV_IOMMU_PREQ_PAYLOAD_M GENMASK_ULL(2, 0)
+#define RISCV_IOMMU_PREQ_PRG_INDEX GENMASK_ULL(11, 3)
+#define RISCV_IOMMU_PREQ_UADDR GENMASK_ULL(63, 12)
+
+
+/*
+ * struct riscv_iommu_msi_pte - MSI Page Table Entry
+ */
+struct riscv_iommu_msi_pte {
+ uint64_t pte;
+ uint64_t mrif_info;
};
/* Fields on pte */
diff --git a/hw/riscv/riscv-iommu.c b/hw/riscv/riscv-iommu.c
index 03a610fa75..7af5929b10 100644
--- a/hw/riscv/riscv-iommu.c
+++ b/hw/riscv/riscv-iommu.c
@@ -576,7 +576,7 @@ static int riscv_iommu_ctx_fetch(RISCVIOMMUState *s,
RISCVIOMMUContext *ctx)
RISCV_IOMMU_DC_IOHGATP_MODE_BARE);
ctx->satp = set_field(0, RISCV_IOMMU_ATP_MODE_FIELD,
RISCV_IOMMU_DC_FSC_MODE_BARE);
- ctx->tc = RISCV_IOMMU_DC_TC_V;
+ ctx->tc = RISCV_IOMMU_DC_TC_EN_ATS | RISCV_IOMMU_DC_TC_V;
ctx->ta = 0;
ctx->msiptp = 0;
return 0;
@@ -1021,6 +1021,18 @@ static int riscv_iommu_translate(RISCVIOMMUState *s,
RISCVIOMMUContext *ctx,
enable_pri = (iotlb->perm == IOMMU_NONE) && (ctx->tc & BIT_ULL(32));
enable_pasid = (ctx->tc & RISCV_IOMMU_DC_TC_PDTV);
+ /* Check for ATS request. */
+ if (iotlb->perm == IOMMU_NONE) {
+ /* Check if ATS is disabled. */
+ if (!(ctx->tc & RISCV_IOMMU_DC_TC_EN_ATS)) {
+ enable_pri = false;
+ fault = RISCV_IOMMU_FQ_CAUSE_TTYPE_BLOCKED;
+ goto done;
+ }
+ trace_riscv_iommu_ats(s->parent_obj.id, PCI_BUS_NUM(ctx->devid),
+ PCI_SLOT(ctx->devid), PCI_FUNC(ctx->devid), iotlb->iova);
+ }
+
iot = riscv_iommu_iot_lookup(ctx, iot_cache, iotlb->iova);
perm = iot ? iot->perm : IOMMU_NONE;
if (perm != IOMMU_NONE) {
@@ -1067,13 +1079,10 @@ done:
if (enable_faults && fault) {
struct riscv_iommu_fq_record ev;
- unsigned ttype;
-
- if (iotlb->perm & IOMMU_RW) {
- ttype = RISCV_IOMMU_FQ_TTYPE_UADDR_WR;
- } else {
- ttype = RISCV_IOMMU_FQ_TTYPE_UADDR_RD;
- }
+ const unsigned ttype =
+ (iotlb->perm & IOMMU_RW) ? RISCV_IOMMU_FQ_TTYPE_UADDR_WR :
+ ((iotlb->perm & IOMMU_RO) ? RISCV_IOMMU_FQ_TTYPE_UADDR_RD :
+ RISCV_IOMMU_FQ_TTYPE_PCIE_ATS_REQ);
ev.hdr = set_field(0, RISCV_IOMMU_FQ_HDR_CAUSE, fault);
ev.hdr = set_field(ev.hdr, RISCV_IOMMU_FQ_HDR_TTYPE, ttype);
ev.hdr = set_field(ev.hdr, RISCV_IOMMU_FQ_HDR_PV, enable_pasid);
@@ -1105,6 +1114,73 @@ static MemTxResult riscv_iommu_iofence(RISCVIOMMUState
*s, bool notify,
MEMTXATTRS_UNSPECIFIED);
}
+static void riscv_iommu_ats(RISCVIOMMUState *s,
+ struct riscv_iommu_command *cmd, IOMMUNotifierFlag flag,
+ IOMMUAccessFlags perm,
+ void (*trace_fn)(const char *id))
+{
+ RISCVIOMMUSpace *as = NULL;
+ IOMMUNotifier *n;
+ IOMMUTLBEvent event;
+ uint32_t pasid;
+ uint32_t devid;
+ const bool pv = cmd->dword0 & RISCV_IOMMU_CMD_ATS_PV;
+
+ if (cmd->dword0 & RISCV_IOMMU_CMD_ATS_DSV) {
+ /* Use device segment and requester id */
+ devid = get_field(cmd->dword0,
+ RISCV_IOMMU_CMD_ATS_DSEG | RISCV_IOMMU_CMD_ATS_RID);
+ } else {
+ devid = get_field(cmd->dword0, RISCV_IOMMU_CMD_ATS_RID);
+ }
+
+ pasid = get_field(cmd->dword0, RISCV_IOMMU_CMD_ATS_PID);
+
+ qemu_mutex_lock(&s->core_lock);
+ QLIST_FOREACH(as, &s->spaces, list) {
+ if (as->devid == devid) {
+ break;
+ }
+ }
+ qemu_mutex_unlock(&s->core_lock);
+
+ if (!as || !as->notifier) {
+ return;
+ }
+
+ event.type = flag;
+ event.entry.perm = perm;
+ event.entry.target_as = s->target_as;
+
+ IOMMU_NOTIFIER_FOREACH(n, &as->iova_mr) {
+ if (!pv || n->iommu_idx == pasid) {
+ event.entry.iova = n->start;
+ event.entry.addr_mask = n->end - n->start;
+ trace_fn(as->iova_mr.parent_obj.name);
+ memory_region_notify_iommu_one(n, &event);
+ }
+ }
+}
+
+static void riscv_iommu_ats_inval(RISCVIOMMUState *s,
+ struct riscv_iommu_command *cmd)
+{
+ return riscv_iommu_ats(s, cmd, IOMMU_NOTIFIER_DEVIOTLB_UNMAP, IOMMU_NONE,
+ trace_riscv_iommu_ats_inval);
+}
+
+static void riscv_iommu_ats_prgr(RISCVIOMMUState *s,
+ struct riscv_iommu_command *cmd)
+{
+ unsigned resp_code = get_field(cmd->dword1,
+ RISCV_IOMMU_CMD_ATS_PRGR_RESP_CODE);
+
+ /* Using the access flag to carry response code information */
+ IOMMUAccessFlags perm = resp_code ? IOMMU_NONE : IOMMU_RW;
+ return riscv_iommu_ats(s, cmd, IOMMU_NOTIFIER_MAP, perm,
+ trace_riscv_iommu_ats_prgr);
+}
+
static void riscv_iommu_process_ddtp(RISCVIOMMUState *s)
{
uint64_t old_ddtp = s->ddtp;
@@ -1260,6 +1336,17 @@ static void riscv_iommu_process_cq_tail(RISCVIOMMUState
*s)
get_field(cmd.dword0, RISCV_IOMMU_CMD_IODIR_PID));
break;
+ /* ATS commands */
+ case RISCV_IOMMU_CMD(RISCV_IOMMU_CMD_ATS_FUNC_INVAL,
+ RISCV_IOMMU_CMD_ATS_OPCODE):
+ riscv_iommu_ats_inval(s, &cmd);
+ break;
+
+ case RISCV_IOMMU_CMD(RISCV_IOMMU_CMD_ATS_FUNC_PRGR,
+ RISCV_IOMMU_CMD_ATS_OPCODE):
+ riscv_iommu_ats_prgr(s, &cmd);
+ break;
+
default:
cmd_ill:
/* Invalid instruction, do not advance instruction index. */
@@ -1648,6 +1735,9 @@ static void riscv_iommu_realize(DeviceState *dev, Error
**errp)
if (s->enable_msi) {
s->cap |= RISCV_IOMMU_CAP_MSI_FLAT | RISCV_IOMMU_CAP_MSI_MRIF;
}
+ if (s->enable_ats) {
+ s->cap |= RISCV_IOMMU_CAP_ATS;
+ }
if (s->enable_s_stage) {
s->cap |= RISCV_IOMMU_CAP_SV32 | RISCV_IOMMU_CAP_SV39 |
RISCV_IOMMU_CAP_SV48 | RISCV_IOMMU_CAP_SV57;
@@ -1765,6 +1855,7 @@ static Property riscv_iommu_properties[] = {
DEFINE_PROP_UINT32("ioatc-limit", RISCVIOMMUState, iot_limit,
LIMIT_CACHE_IOT),
DEFINE_PROP_BOOL("intremap", RISCVIOMMUState, enable_msi, TRUE),
+ DEFINE_PROP_BOOL("ats", RISCVIOMMUState, enable_ats, TRUE),
DEFINE_PROP_BOOL("off", RISCVIOMMUState, enable_off, TRUE),
DEFINE_PROP_BOOL("s-stage", RISCVIOMMUState, enable_s_stage, TRUE),
DEFINE_PROP_BOOL("g-stage", RISCVIOMMUState, enable_g_stage, TRUE),
diff --git a/hw/riscv/riscv-iommu.h b/hw/riscv/riscv-iommu.h
index 9b33fb97ef..47f3fdad58 100644
--- a/hw/riscv/riscv-iommu.h
+++ b/hw/riscv/riscv-iommu.h
@@ -38,6 +38,7 @@ struct RISCVIOMMUState {
bool enable_off; /* Enable out-of-reset OFF mode (DMA disabled) */
bool enable_msi; /* Enable MSI remapping */
+ bool enable_ats; /* Enable ATS support */
bool enable_s_stage; /* Enable S/VS-Stage translation */
bool enable_g_stage; /* Enable G-Stage translation */
diff --git a/hw/riscv/trace-events b/hw/riscv/trace-events
index 42a97caffa..4b486b6420 100644
--- a/hw/riscv/trace-events
+++ b/hw/riscv/trace-events
@@ -9,3 +9,6 @@ riscv_iommu_msi(const char *id, unsigned b, unsigned d,
unsigned f, uint64_t iov
riscv_iommu_cmd(const char *id, uint64_t l, uint64_t u) "%s: command
0x%"PRIx64" 0x%"PRIx64
riscv_iommu_notifier_add(const char *id) "%s: dev-iotlb notifier added"
riscv_iommu_notifier_del(const char *id) "%s: dev-iotlb notifier removed"
+riscv_iommu_ats(const char *id, unsigned b, unsigned d, unsigned f, uint64_t
iova) "%s: translate request %04x:%02x.%u iova: 0x%"PRIx64
+riscv_iommu_ats_inval(const char *id) "%s: dev-iotlb invalidate"
+riscv_iommu_ats_prgr(const char *id) "%s: dev-iotlb page request group
response"
--
2.43.2
