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[Qemu-devel] [PATCH 2/3] Add PCI memory region registration
From: |
Avi Kivity |
Subject: |
[Qemu-devel] [PATCH 2/3] Add PCI memory region registration |
Date: |
Sun, 24 May 2009 12:29:34 +0300 |
A registered PCI memory region will be automatically mapped and unmapped
as the associated BAR is manipulated.
Signed-off-by: Avi Kivity <address@hidden>
---
hw/pci.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
hw/pci.h | 26 ++++++++++++++++++++
2 files changed, 103 insertions(+), 1 deletions(-)
diff --git a/hw/pci.c b/hw/pci.c
index ee7d403..4c5323a 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -286,6 +286,9 @@ static void pci_unregister_io_regions(PCIDevice *pci_dev)
for(i = 0; i < PCI_NUM_REGIONS; i++) {
r = &pci_dev->io_regions[i];
+ while (!LIST_EMPTY(&r->components)) {
+ pci_unregister_physical_memory(pci_dev, i,
LIST_FIRST(&r->components));
+ }
if (!r->size || r->addr == -1)
continue;
if (r->type == PCI_ADDRESS_SPACE_IO) {
@@ -343,11 +346,77 @@ void pci_register_io_region(PCIDevice *pci_dev, int
region_num,
addr = 0x10 + region_num * 4;
}
*(uint32_t *)(pci_dev->config + addr) = cpu_to_le32(type);
+ LIST_INIT(&r->components);
+}
+
+PCIIORegionComponent *pci_register_physical_memory(PCIDevice *pci_dev,
+ int region_num,
+ target_phys_addr_t size,
+ ram_addr_t ram_addr)
+{
+ return pci_register_physical_memory_offset(pci_dev, region_num, 0, size,
+ ram_addr, 0);
+}
+
+static void pci_region_instantiate(PCIIORegionComponent *pci_mem,
+ uint32_t old_addr, uint32_t new_addr)
+{
+ if (new_addr == old_addr) {
+ return;
+ }
+
+ if (old_addr != -1) {
+ physical_memory_region_unregister(pci_mem->pmr);
+ pci_mem->pmr = NULL;
+ }
+
+ if (new_addr != -1) {
+ pci_mem->pmr = physical_memory_region_register_offset(
+ new_addr + pci_mem->offset,
+ pci_mem->size,
+ pci_mem->ram_addr,
+ pci_mem->region_offset);
+ }
+}
+
+PCIIORegionComponent *pci_register_physical_memory_offset(
+ PCIDevice *pci_dev,
+ int region_num,
+ target_phys_addr_t offset,
+ target_phys_addr_t size,
+ ram_addr_t ram_addr,
+ ram_addr_t region_offset)
+{
+ PCIIORegionComponent *pci_mem = (PCIIORegionComponent
*)qemu_malloc(sizeof(*pci_mem));
+ PCIIORegion *r = &pci_dev->io_regions[region_num];
+
+ pci_mem->offset = offset;
+ pci_mem->size = size;
+ pci_mem->ram_addr = ram_addr;
+ pci_mem->region_offset = region_offset;
+ pci_mem->pmr = NULL;
+ LIST_INSERT_HEAD(&r->components, pci_mem, link);
+
+ pci_region_instantiate(pci_mem, -1, r->addr);
+
+ return pci_mem;
+}
+
+void pci_unregister_physical_memory(PCIDevice *pci_dev,
+ int region_num,
+ PCIIORegionComponent *pci_mem)
+{
+ PCIIORegion *r = &pci_dev->io_regions[region_num];
+
+ pci_region_instantiate(pci_mem, r->addr, -1);
+ LIST_REMOVE(pci_mem, link);
+ qemu_free(pci_mem);
}
static void pci_update_mappings(PCIDevice *d)
{
PCIIORegion *r;
+ PCIIORegionComponent *pci_mem;
int cmd, i;
uint32_t last_addr, new_addr, config_ofs;
@@ -396,6 +465,11 @@ static void pci_update_mappings(PCIDevice *d)
new_addr = -1;
}
}
+
+ LIST_FOREACH(pci_mem, &r->components, link) {
+ pci_region_instantiate(pci_mem, r->addr, new_addr);
+ }
+
/* now do the real mapping */
if (new_addr != r->addr) {
if (r->addr != -1) {
@@ -418,7 +492,9 @@ static void pci_update_mappings(PCIDevice *d)
}
r->addr = new_addr;
if (r->addr != -1) {
- r->map_func(d, i, r->addr, r->size, r->type);
+ if (r->map_func) {
+ r->map_func(d, i, r->addr, r->size, r->type);
+ }
}
}
}
diff --git a/hw/pci.h b/hw/pci.h
index ff858a1..b27e8fd 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -2,6 +2,7 @@
#define QEMU_PCI_H
#include "qemu-common.h"
+#include "sys-queue.h"
/* PCI includes legacy ISA access. */
#include "isa.h"
@@ -80,11 +81,21 @@ typedef int PCIUnregisterFunc(PCIDevice *pci_dev);
#define PCI_ADDRESS_SPACE_IO 0x01
#define PCI_ADDRESS_SPACE_MEM_PREFETCH 0x08
+typedef struct PCIIORegionComponent {
+ PhysicalMemoryRegion *pmr;
+ target_phys_addr_t offset;
+ target_phys_addr_t size;
+ ram_addr_t ram_addr;
+ ram_addr_t region_offset;
+ LIST_ENTRY(PCIIORegionComponent) link;
+} PCIIORegionComponent;
+
typedef struct PCIIORegion {
uint32_t addr; /* current PCI mapping address. -1 means not mapped */
uint32_t size;
uint8_t type;
PCIMapIORegionFunc *map_func;
+ LIST_HEAD(pci_region_list, PCIIORegionComponent) components;
} PCIIORegion;
#define PCI_ROM_SLOT 6
@@ -171,6 +182,21 @@ void pci_register_io_region(PCIDevice *pci_dev, int
region_num,
uint32_t size, int type,
PCIMapIORegionFunc *map_func);
+PCIIORegionComponent *pci_register_physical_memory(PCIDevice *pci_dev,
+ int region_num,
+ target_phys_addr_t size,
+ ram_addr_t ram_addr);
+PCIIORegionComponent *pci_register_physical_memory_offset(
+ PCIDevice *pci_dev,
+ int region_num,
+ target_phys_addr_t offset,
+ target_phys_addr_t size,
+ ram_addr_t ram_addr,
+ ram_addr_t region_offset);
+void pci_unregister_physical_memory(PCIDevice *pci_dev,
+ int region_num,
+ PCIIORegionComponent *pci_mem);
+
uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len);
void pci_default_write_config(PCIDevice *d,
--
1.6.0.6
- [Qemu-devel] [PATCH 0/3] Object-based physical memory management, Avi Kivity, 2009/05/24
- [Qemu-devel] [PATCH 1/3] Add PhysicalMemoryRegion type, Avi Kivity, 2009/05/24
- [Qemu-devel] [PATCH 2/3] Add PCI memory region registration,
Avi Kivity <=
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Anthony Liguori, 2009/05/27
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Avi Kivity, 2009/05/27
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Anthony Liguori, 2009/05/27
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Avi Kivity, 2009/05/27
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Anthony Liguori, 2009/05/27
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Christoph Hellwig, 2009/05/31
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Avi Kivity, 2009/05/31
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Avi Kivity, 2009/05/31
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Anthony Liguori, 2009/05/31
- Re: [Qemu-devel] [PATCH 2/3] Add PCI memory region registration, Avi Kivity, 2009/05/31