[Qemu-devel] [PATCHv2 3/3] pci_host: rewrite using rwhandler

["Michael S. Tsirkin" <mst@redhat.com>]

Save a ton of code by switching pcihost to use rwhandler.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci_host.c          |  172 +++++++++++++++++++----------------------------
 hw/pci_host.h          |    4 +
 hw/pci_host_template.h |  109 ------------------------------
 3 files changed, 74 insertions(+), 211 deletions(-)
 delete mode 100644 hw/pci_host_template.h

diff --git a/hw/pci_host.c b/hw/pci_host.c
index 6289ead..e96f617 100644
--- a/hw/pci_host.c
+++ b/hw/pci_host.c
@@ -79,152 +79,120 @@ uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len)
     return val;
 }
 
-static void pci_host_config_writel(void *opaque, target_phys_addr_t addr,
-                                   uint32_t val)
+static void pci_host_config_write(ReadWriteHandler *handler,
+				  uint64_t addr, uint32_t val, int len)
 {
-    PCIHostState *s = opaque;
+    PCIHostState *s = container_of(handler, PCIHostState, conf_handler);
 
+    PCI_DPRINTF("%s addr %" PRIx64 " %d val %"PRIx32"\n",
+                __func__, addr, len, val);
 #ifdef TARGET_WORDS_BIGENDIAN
-    val = bswap32(val);
+    val = qemu_bswap_len(val, len);
 #endif
-    PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
-                __func__, addr, val);
     s->config_reg = val;
 }
 
-static uint32_t pci_host_config_readl(void *opaque, target_phys_addr_t addr)
+static uint32_t pci_host_config_read(ReadWriteHandler *handler,
+                                            uint64_t addr, int len)
 {
-    PCIHostState *s = opaque;
+    PCIHostState *s = container_of(handler, PCIHostState, conf_handler);
     uint32_t val = s->config_reg;
-
 #ifdef TARGET_WORDS_BIGENDIAN
-    val = bswap32(val);
+    val = qemu_bswap_len(val, len);
 #endif
-    PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
-                __func__, addr, val);
+    PCI_DPRINTF("%s addr %" PRIx64 " len %d val %"PRIx32"\n",
+                __func__, addr, len, val);
     return val;
 }
 
-static CPUWriteMemoryFunc * const pci_host_config_write[] = {
-    &pci_host_config_writel,
-    &pci_host_config_writel,
-    &pci_host_config_writel,
-};
-
-static CPUReadMemoryFunc * const pci_host_config_read[] = {
-    &pci_host_config_readl,
-    &pci_host_config_readl,
-    &pci_host_config_readl,
-};
-
-int pci_host_conf_register_mmio(PCIHostState *s)
-{
-    return cpu_register_io_memory(pci_host_config_read,
-                                  pci_host_config_write, s);
-}
-
-static void pci_host_config_writel_noswap(void *opaque,
-                                          target_phys_addr_t addr,
-                                          uint32_t val)
+static void pci_host_config_write_noswap(ReadWriteHandler *handler,
+					 uint64_t addr, uint32_t val, int len)
 {
-    PCIHostState *s = opaque;
+    PCIHostState *s = container_of(handler, PCIHostState, conf_noswap_handler);
 
-    PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
-                __func__, addr, val);
+    PCI_DPRINTF("%s addr %" PRIx64 " %d val %"PRIx32"\n",
+                __func__, addr, len, val);
     s->config_reg = val;
 }
 
-static uint32_t pci_host_config_readl_noswap(void *opaque,
-                                             target_phys_addr_t addr)
+static uint32_t pci_host_config_read_noswap(ReadWriteHandler *handler,
+                                            uint64_t addr, int len)
 {
-    PCIHostState *s = opaque;
+    PCIHostState *s = container_of(handler, PCIHostState, conf_noswap_handler);
     uint32_t val = s->config_reg;
 
-    PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
-                __func__, addr, val);
+    PCI_DPRINTF("%s addr %" PRIx64 " len %d val %"PRIx32"\n",
+                __func__, addr, len, val);
     return val;
 }
 
-static CPUWriteMemoryFunc * const pci_host_config_write_noswap[] = {
-    &pci_host_config_writel_noswap,
-    &pci_host_config_writel_noswap,
-    &pci_host_config_writel_noswap,
-};
-
-static CPUReadMemoryFunc * const pci_host_config_read_noswap[] = {
-    &pci_host_config_readl_noswap,
-    &pci_host_config_readl_noswap,
-    &pci_host_config_readl_noswap,
-};
-
-int pci_host_conf_register_mmio_noswap(PCIHostState *s)
+static void pci_host_data_write(ReadWriteHandler *handler,
+				uint64_t addr, uint32_t val, int len)
 {
-    return cpu_register_io_memory(pci_host_config_read_noswap,
-                                  pci_host_config_write_noswap, s);
+    PCIHostState *s = container_of(handler, PCIHostState, data_handler);
+#ifdef TARGET_WORDS_BIGENDIAN
+    val = qemu_bswap_len(val, len);
+#endif
+    PCI_DPRINTF("write addr %" PRIx64 " len %d val %x\n",
+                addr, len, val);
+    if (s->config_reg & (1u << 31))
+        pci_data_write(s->bus, s->config_reg | (addr & 3), val, len);
 }
 
-static void pci_host_config_writel_ioport(void *opaque,
-                                          uint32_t addr, uint32_t val)
+static uint32_t pci_host_data_read(ReadWriteHandler *handler,
+				   uint64_t addr, int len)
 {
-    PCIHostState *s = opaque;
+    PCIHostState *s = container_of(handler, PCIHostState, data_handler);
+    uint32_t val;
+    if (!(s->config_reg & (1 << 31)))
+        return 0xffffffff;
+    val = pci_data_read(s->bus, s->config_reg | (addr & 3), len);
+    PCI_DPRINTF("read addr %" PRIx64 " len %d val %x\n",
+                addr, len, val);
+#ifdef TARGET_WORDS_BIGENDIAN
+    val = qemu_bswap_len(val, len);
+#endif
+    return val;
+}
 
-    PCI_DPRINTF("%s addr %"PRIx32 " val %"PRIx32"\n", __func__, addr, val);
-    s->config_reg = val;
+static void pci_host_init(PCIHostState *s)
+{
+    s->conf_handler.write = pci_host_config_write;
+    s->conf_handler.read = pci_host_config_read;
+    s->conf_noswap_handler.write = pci_host_config_write_noswap;
+    s->conf_noswap_handler.read = pci_host_config_read_noswap;
+    s->data_handler.write = pci_host_data_write;
+    s->data_handler.read = pci_host_data_read;
 }
 
-static uint32_t pci_host_config_readl_ioport(void *opaque, uint32_t addr)
+int pci_host_conf_register_mmio(PCIHostState *s)
 {
-    PCIHostState *s = opaque;
-    uint32_t val = s->config_reg;
+    pci_host_init(s);
+    return cpu_register_io_memory_simple(&s->conf_handler);
+}
 
-    PCI_DPRINTF("%s addr %"PRIx32" val %"PRIx32"\n", __func__, addr, val);
-    return val;
+int pci_host_conf_register_mmio_noswap(PCIHostState *s)
+{
+    pci_host_init(s);
+    return cpu_register_io_memory_simple(&s->conf_noswap_handler);
 }
 
 void pci_host_conf_register_ioport(pio_addr_t ioport, PCIHostState *s)
 {
-    register_ioport_write(ioport, 4, 4, pci_host_config_writel_ioport, s);
-    register_ioport_read(ioport, 4, 4, pci_host_config_readl_ioport, s);
+    pci_host_init(s);
+    register_ioport_simple(&s->conf_noswap_handler, ioport, 4, 4);
 }
 
-#define PCI_ADDR_T      target_phys_addr_t
-#define PCI_HOST_SUFFIX _mmio
-
-#include "pci_host_template.h"
-
-static CPUWriteMemoryFunc * const pci_host_data_write_mmio[] = {
-    pci_host_data_writeb_mmio,
-    pci_host_data_writew_mmio,
-    pci_host_data_writel_mmio,
-};
-
-static CPUReadMemoryFunc * const pci_host_data_read_mmio[] = {
-    pci_host_data_readb_mmio,
-    pci_host_data_readw_mmio,
-    pci_host_data_readl_mmio,
-};
-
 int pci_host_data_register_mmio(PCIHostState *s)
 {
-    return cpu_register_io_memory(pci_host_data_read_mmio,
-                                  pci_host_data_write_mmio,
-                                  s);
+    pci_host_init(s);
+    return cpu_register_io_memory_simple(&s->data_handler);
 }
 
-#undef PCI_ADDR_T
-#undef PCI_HOST_SUFFIX
-
-#define PCI_ADDR_T      uint32_t
-#define PCI_HOST_SUFFIX _ioport
-
-#include "pci_host_template.h"
-
 void pci_host_data_register_ioport(pio_addr_t ioport, PCIHostState *s)
 {
-    register_ioport_write(ioport, 4, 1, pci_host_data_writeb_ioport, s);
-    register_ioport_write(ioport, 4, 2, pci_host_data_writew_ioport, s);
-    register_ioport_write(ioport, 4, 4, pci_host_data_writel_ioport, s);
-    register_ioport_read(ioport, 4, 1, pci_host_data_readb_ioport, s);
-    register_ioport_read(ioport, 4, 2, pci_host_data_readw_ioport, s);
-    register_ioport_read(ioport, 4, 4, pci_host_data_readl_ioport, s);
+    pci_host_init(s);
+    register_ioport_simple(&s->data_handler, ioport, 4, 1);
+    register_ioport_simple(&s->data_handler, ioport, 4, 2);
+    register_ioport_simple(&s->data_handler, ioport, 4, 4);
 }
diff --git a/hw/pci_host.h b/hw/pci_host.h
index a006687..5ff6443 100644
--- a/hw/pci_host.h
+++ b/hw/pci_host.h
@@ -29,9 +29,13 @@
 #define PCI_HOST_H
 
 #include "sysbus.h"
+#include "rwhandler.h"
 
 struct PCIHostState {
     SysBusDevice busdev;
+    ReadWriteHandler conf_noswap_handler;
+    ReadWriteHandler conf_handler;
+    ReadWriteHandler data_handler;
     uint32_t config_reg;
     PCIBus *bus;
 };
diff --git a/hw/pci_host_template.h b/hw/pci_host_template.h
deleted file mode 100644
index 11e6c88..0000000
--- a/hw/pci_host_template.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * QEMU Common PCI Host bridge configuration data space access routines.
- *
- * Copyright (c) 2006 Fabrice Bellard
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-/* Worker routines for a PCI host controller that uses an {address,data}
-   register pair to access PCI configuration space.  */
-
-static void glue(pci_host_data_writeb, PCI_HOST_SUFFIX)(
-    void* opaque, PCI_ADDR_T addr, uint32_t val)
-{
-    PCIHostState *s = opaque;
-
-    PCI_DPRINTF("writeb addr " TARGET_FMT_plx " val %x\n",
-                (target_phys_addr_t)addr, val);
-    if (s->config_reg & (1u << 31))
-        pci_data_write(s->bus, s->config_reg | (addr & 3), val, 1);
-}
-
-static void glue(pci_host_data_writew, PCI_HOST_SUFFIX)(
-    void* opaque, PCI_ADDR_T addr, uint32_t val)
-{
-    PCIHostState *s = opaque;
-#ifdef TARGET_WORDS_BIGENDIAN
-    val = bswap16(val);
-#endif
-    PCI_DPRINTF("writew addr " TARGET_FMT_plx " val %x\n",
-                (target_phys_addr_t)addr, val);
-    if (s->config_reg & (1u << 31))
-        pci_data_write(s->bus, s->config_reg | (addr & 3), val, 2);
-}
-
-static void glue(pci_host_data_writel, PCI_HOST_SUFFIX)(
-    void* opaque, PCI_ADDR_T addr, uint32_t val)
-{
-    PCIHostState *s = opaque;
-#ifdef TARGET_WORDS_BIGENDIAN
-    val = bswap32(val);
-#endif
-    PCI_DPRINTF("writel addr " TARGET_FMT_plx " val %x\n",
-                (target_phys_addr_t)addr, val);
-    if (s->config_reg & (1u << 31))
-        pci_data_write(s->bus, s->config_reg, val, 4);
-}
-
-static uint32_t glue(pci_host_data_readb, PCI_HOST_SUFFIX)(
-    void* opaque, PCI_ADDR_T addr)
-{
-    PCIHostState *s = opaque;
-    uint32_t val;
-
-    if (!(s->config_reg & (1 << 31)))
-        return 0xff;
-    val = pci_data_read(s->bus, s->config_reg | (addr & 3), 1);
-    PCI_DPRINTF("readb addr " TARGET_FMT_plx " val %x\n",
-                (target_phys_addr_t)addr, val);
-    return val;
-}
-
-static uint32_t glue(pci_host_data_readw, PCI_HOST_SUFFIX)(
-    void* opaque, PCI_ADDR_T addr)
-{
-    PCIHostState *s = opaque;
-    uint32_t val;
-    if (!(s->config_reg & (1 << 31)))
-        return 0xffff;
-    val = pci_data_read(s->bus, s->config_reg | (addr & 3), 2);
-    PCI_DPRINTF("readw addr " TARGET_FMT_plx " val %x\n",
-                (target_phys_addr_t)addr, val);
-#ifdef TARGET_WORDS_BIGENDIAN
-    val = bswap16(val);
-#endif
-    return val;
-}
-
-static uint32_t glue(pci_host_data_readl, PCI_HOST_SUFFIX)(
-    void* opaque, PCI_ADDR_T addr)
-{
-    PCIHostState *s = opaque;
-    uint32_t val;
-    if (!(s->config_reg & (1 << 31)))
-        return 0xffffffff;
-    val = pci_data_read(s->bus, s->config_reg | (addr & 3), 4);
-    PCI_DPRINTF("readl addr " TARGET_FMT_plx " val %x\n",
-                (target_phys_addr_t)addr, val);
-#ifdef TARGET_WORDS_BIGENDIAN
-    val = bswap32(val);
-#endif
-    return val;
-}
-- 
1.6.6.144.g5c3af