[Qemu-devel] [PULL 0/4] Block patches (includes build fix for non-Linux)

[Qemu-devel] [PULL 0/4] Block patches (includes build fix for non-Linux)

[Kevin Wolf]

The following changes since commit 27cdad67a1bc23b38c765b677ed8064bfb8d3e44:

  Revert "alpha-softmmu: Disable for the 0.15 release branch." (2011-09-21 00:50:32 +0200)

are available in the git repository at:
  git://repo.or.cz/qemu/kevin.git for-anthony

Daniel Verkamp (1):
      ahci: add port I/O index-data pair

Nick Thomas (2):
      block/curl: Implement a flush function on the fd handlers
      block/curl: Don't finish AIOCBs too early

Paolo Bonzini (1):
      nbd: fix non-Linux build failure

 block/curl.c  |   94 +++++++++++++++++++++++++++++++++++++++++++--------------
 hw/ide/ahci.c |   42 +++++++++++++++++++++++++-
 hw/ide/ahci.h |    9 +++++-
 hw/ide/ich.c  |   27 ++++++++++++++++-
 hw/pci_regs.h |    1 +
 nbd.c         |    2 +-
 6 files changed, 148 insertions(+), 27 deletions(-)

[Qemu-devel] [PATCH 1/4] nbd: fix non-Linux build failure

[Kevin Wolf]

From: Paolo Bonzini <pbonzini@redhat.com>

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 nbd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/nbd.c b/nbd.c
index 595f4d8..fb5e424 100644
--- a/nbd.c
+++ b/nbd.c
@@ -439,7 +439,7 @@ int nbd_client(int fd)
     return ret;
 }
 #else
-int nbd_init(int fd, int csock, off_t size, size_t blocksize)
+int nbd_init(int fd, int csock, uint32_t flags, off_t size, size_t blocksize)
 {
     errno = ENOTSUP;
     return -1;
-- 
1.7.6.2

[Qemu-devel] [PATCH 2/4] ahci: add port I/O index-data pair

[Kevin Wolf]

From: Daniel Verkamp <daniel@drv.nu>

Implement an I/O space index-data register pair as defined by the AHCI
spec, including the corresponding SATA PCI capability and BAR.

This allows real-mode code to access the AHCI registers; real-mode
code cannot address the memory-mapped register space because it is
beyond the first megabyte.

Signed-off-by: Daniel Verkamp <daniel@drv.nu>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 hw/ide/ahci.c |   42 +++++++++++++++++++++++++++++++++++++++++-
 hw/ide/ahci.h |    9 ++++++++-
 hw/ide/ich.c  |   27 ++++++++++++++++++++++++++-
 hw/pci_regs.h |    1 +
 4 files changed, 76 insertions(+), 3 deletions(-)

diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 226230c..1c7e3a0 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -370,6 +370,43 @@ static MemoryRegionOps ahci_mem_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
+static uint64_t ahci_idp_read(void *opaque, target_phys_addr_t addr,
+                              unsigned size)
+{
+    AHCIState *s = opaque;
+
+    if (addr == s->idp_offset) {
+        /* index register */
+        return s->idp_index;
+    } else if (addr == s->idp_offset + 4) {
+        /* data register - do memory read at location selected by index */
+        return ahci_mem_read(opaque, s->idp_index, size);
+    } else {
+        return 0;
+    }
+}
+
+static void ahci_idp_write(void *opaque, target_phys_addr_t addr,
+                           uint64_t val, unsigned size)
+{
+    AHCIState *s = opaque;
+
+    if (addr == s->idp_offset) {
+        /* index register - mask off reserved bits */
+        s->idp_index = (uint32_t)val & ((AHCI_MEM_BAR_SIZE - 1) & ~3);
+    } else if (addr == s->idp_offset + 4) {
+        /* data register - do memory write at location selected by index */
+        ahci_mem_write(opaque, s->idp_index, val, size);
+    }
+}
+
+static MemoryRegionOps ahci_idp_ops = {
+    .read = ahci_idp_read,
+    .write = ahci_idp_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+
 static void ahci_reg_init(AHCIState *s)
 {
     int i;
@@ -1130,7 +1167,9 @@ void ahci_init(AHCIState *s, DeviceState *qdev, int ports)
     s->dev = g_malloc0(sizeof(AHCIDevice) * ports);
     ahci_reg_init(s);
     /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */
-    memory_region_init_io(&s->mem, &ahci_mem_ops, s, "ahci", 0x1000);
+    memory_region_init_io(&s->mem, &ahci_mem_ops, s, "ahci", AHCI_MEM_BAR_SIZE);
+    memory_region_init_io(&s->idp, &ahci_idp_ops, s, "ahci-idp", 32);
+
     irqs = qemu_allocate_irqs(ahci_irq_set, s, s->ports);
 
     for (i = 0; i < s->ports; i++) {
@@ -1150,6 +1189,7 @@ void ahci_init(AHCIState *s, DeviceState *qdev, int ports)
 void ahci_uninit(AHCIState *s)
 {
     memory_region_destroy(&s->mem);
+    memory_region_destroy(&s->idp);
     g_free(s->dev);
 }
 
diff --git a/hw/ide/ahci.h b/hw/ide/ahci.h
index 5de986c..b223d2c 100644
--- a/hw/ide/ahci.h
+++ b/hw/ide/ahci.h
@@ -24,7 +24,7 @@
 #ifndef HW_IDE_AHCI_H
 #define HW_IDE_AHCI_H
 
-#define AHCI_PCI_BAR              5
+#define AHCI_MEM_BAR_SIZE         0x1000
 #define AHCI_MAX_PORTS            32
 #define AHCI_MAX_SG               168 /* hardware max is 64K */
 #define AHCI_DMA_BOUNDARY         0xffffffff
@@ -212,6 +212,10 @@
 #define RES_FIS_SDBFIS                     0x58
 #define RES_FIS_UFIS                       0x60
 
+#define SATA_CAP_SIZE           0x8
+#define SATA_CAP_REV            0x2
+#define SATA_CAP_BAR            0x4
+
 typedef struct AHCIControlRegs {
     uint32_t    cap;
     uint32_t    ghc;
@@ -290,6 +294,9 @@ typedef struct AHCIState {
     AHCIDevice *dev;
     AHCIControlRegs control_regs;
     MemoryRegion mem;
+    MemoryRegion idp;       /* Index-Data Pair I/O port space */
+    unsigned idp_offset;    /* Offset of index in I/O port space */
+    uint32_t idp_index;     /* Current IDP index */
     int ports;
     qemu_irq irq;
 } AHCIState;
diff --git a/hw/ide/ich.c b/hw/ide/ich.c
index 0327d0e..3f7510f 100644
--- a/hw/ide/ich.c
+++ b/hw/ide/ich.c
@@ -71,6 +71,14 @@
 #include <hw/ide/pci.h>
 #include <hw/ide/ahci.h>
 
+#define ICH9_SATA_CAP_OFFSET    0xA8
+
+#define ICH9_IDP_BAR            4
+#define ICH9_MEM_BAR            5
+
+#define ICH9_IDP_INDEX          0x10
+#define ICH9_IDP_INDEX_LOG2     0x04
+
 static const VMStateDescription vmstate_ahci = {
     .name = "ahci",
     .unmigratable = 1,
@@ -79,6 +87,8 @@ static const VMStateDescription vmstate_ahci = {
 static int pci_ich9_ahci_init(PCIDevice *dev)
 {
     struct AHCIPCIState *d;
+    int sata_cap_offset;
+    uint8_t *sata_cap;
     d = DO_UPCAST(struct AHCIPCIState, card, dev);
 
     ahci_init(&d->ahci, &dev->qdev, 6);
@@ -97,7 +107,22 @@ static int pci_ich9_ahci_init(PCIDevice *dev)
     msi_init(dev, 0x50, 1, true, false);
     d->ahci.irq = d->card.irq[0];
 
-    pci_register_bar(&d->card, 5, 0, &d->ahci.mem);
+    pci_register_bar(&d->card, ICH9_IDP_BAR, PCI_BASE_ADDRESS_SPACE_IO,
+                     &d->ahci.idp);
+    pci_register_bar(&d->card, ICH9_MEM_BAR, PCI_BASE_ADDRESS_SPACE_MEMORY,
+                     &d->ahci.mem);
+
+    sata_cap_offset = pci_add_capability(&d->card, PCI_CAP_ID_SATA,
+                                         ICH9_SATA_CAP_OFFSET, SATA_CAP_SIZE);
+    if (sata_cap_offset < 0) {
+        return sata_cap_offset;
+    }
+
+    sata_cap = d->card.config + sata_cap_offset;
+    pci_set_word(sata_cap + SATA_CAP_REV, 0x10);
+    pci_set_long(sata_cap + SATA_CAP_BAR,
+                 (ICH9_IDP_BAR + 0x4) | (ICH9_IDP_INDEX_LOG2 << 4));
+    d->ahci.idp_offset = ICH9_IDP_INDEX;
 
     return 0;
 }
diff --git a/hw/pci_regs.h b/hw/pci_regs.h
index e884096..e8357c3 100644
--- a/hw/pci_regs.h
+++ b/hw/pci_regs.h
@@ -211,6 +211,7 @@
 #define  PCI_CAP_ID_AGP3	0x0E	/* AGP Target PCI-PCI bridge */
 #define  PCI_CAP_ID_EXP 	0x10	/* PCI Express */
 #define  PCI_CAP_ID_MSIX	0x11	/* MSI-X */
+#define  PCI_CAP_ID_SATA	0x12	/* Serial ATA */
 #define  PCI_CAP_ID_AF		0x13	/* PCI Advanced Features */
 #define PCI_CAP_LIST_NEXT	1	/* Next capability in the list */
 #define PCI_CAP_FLAGS		2	/* Capability defined flags (16 bits) */
-- 
1.7.6.2

[Qemu-devel] [PATCH 3/4] block/curl: Implement a flush function on the fd handlers

[Kevin Wolf]

From: Nick Thomas <nick@bytemark.co.uk>

Signed-off-by: Nick Thomas <nick@bytemark.co.uk>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/curl.c |   26 ++++++++++++++++++++++----
 1 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/block/curl.c b/block/curl.c
index f3f61cc..21fed93 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -76,6 +76,7 @@ typedef struct BDRVCURLState {
 
 static void curl_clean_state(CURLState *s);
 static void curl_multi_do(void *arg);
+static int curl_aio_flush(void *opaque);
 
 static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
                         void *s, void *sp)
@@ -83,14 +84,16 @@ static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
     DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, fd);
     switch (action) {
         case CURL_POLL_IN:
-            qemu_aio_set_fd_handler(fd, curl_multi_do, NULL, NULL, NULL, s);
+            qemu_aio_set_fd_handler(fd, curl_multi_do, NULL, curl_aio_flush,
+                                    NULL, s);
             break;
         case CURL_POLL_OUT:
-            qemu_aio_set_fd_handler(fd, NULL, curl_multi_do, NULL, NULL, s);
+            qemu_aio_set_fd_handler(fd, NULL, curl_multi_do, curl_aio_flush,
+                                    NULL, s);
             break;
         case CURL_POLL_INOUT:
-            qemu_aio_set_fd_handler(fd, curl_multi_do,
-                                    curl_multi_do, NULL, NULL, s);
+            qemu_aio_set_fd_handler(fd, curl_multi_do, curl_multi_do,
+                                    curl_aio_flush, NULL, s);
             break;
         case CURL_POLL_REMOVE:
             qemu_aio_set_fd_handler(fd, NULL, NULL, NULL, NULL, NULL);
@@ -412,6 +415,21 @@ out_noclean:
     return -EINVAL;
 }
 
+static int curl_aio_flush(void *opaque)
+{
+    BDRVCURLState *s = opaque;
+    int i, j;
+
+    for (i=0; i < CURL_NUM_STATES; i++) {
+        for(j=0; j < CURL_NUM_ACB; j++) {
+            if (s->states[i].acb[j]) {
+                return 1;
+            }
+        }
+    }
+    return 0;
+}
+
 static void curl_aio_cancel(BlockDriverAIOCB *blockacb)
 {
     // Do we have to implement canceling? Seems to work without...
-- 
1.7.6.2

[Qemu-devel] [PATCH 4/4] block/curl: Don't finish AIOCBs too early

[Kevin Wolf]

From: Nick Thomas <nick@bytemark.co.uk>

The previous behaviour was to finish AIOCBs inside curl_aio_readv()
if the data was cached. This caused the following failed assertion
at hw/ide/pci.c:314: bmdma_cmd_writeb

"Assertion `bm->bus->dma->aiocb == ((void *)0)' failed."

By scheduling a QEMUBH and performing the completion inside the
callback, we avoid this problem.

Signed-off-by: Nick Thomas <nick@bytemark.co.uk>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/curl.c |   68 +++++++++++++++++++++++++++++++++++++++++----------------
 1 files changed, 49 insertions(+), 19 deletions(-)

diff --git a/block/curl.c b/block/curl.c
index 21fed93..4209ac8 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -47,7 +47,12 @@ struct BDRVCURLState;
 
 typedef struct CURLAIOCB {
     BlockDriverAIOCB common;
+    QEMUBH *bh;
     QEMUIOVector *qiov;
+
+    int64_t sector_num;
+    int nb_sectors;
+
     size_t start;
     size_t end;
 } CURLAIOCB;
@@ -440,43 +445,42 @@ static AIOPool curl_aio_pool = {
     .cancel             = curl_aio_cancel,
 };
 
-static BlockDriverAIOCB *curl_aio_readv(BlockDriverState *bs,
-        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
-        BlockDriverCompletionFunc *cb, void *opaque)
+
+static void curl_readv_bh_cb(void *p)
 {
-    BDRVCURLState *s = bs->opaque;
-    CURLAIOCB *acb;
-    size_t start = sector_num * SECTOR_SIZE;
-    size_t end;
     CURLState *state;
 
-    acb = qemu_aio_get(&curl_aio_pool, bs, cb, opaque);
-    if (!acb)
-        return NULL;
+    CURLAIOCB *acb = p;
+    BDRVCURLState *s = acb->common.bs->opaque;
 
-    acb->qiov = qiov;
+    qemu_bh_delete(acb->bh);
+    acb->bh = NULL;
+
+    size_t start = acb->sector_num * SECTOR_SIZE;
+    size_t end;
 
     // In case we have the requested data already (e.g. read-ahead),
     // we can just call the callback and be done.
-
-    switch (curl_find_buf(s, start, nb_sectors * SECTOR_SIZE, acb)) {
+    switch (curl_find_buf(s, start, acb->nb_sectors * SECTOR_SIZE, acb)) {
         case FIND_RET_OK:
             qemu_aio_release(acb);
             // fall through
         case FIND_RET_WAIT:
-            return &acb->common;
+            return;
         default:
             break;
     }
 
     // No cache found, so let's start a new request
-
     state = curl_init_state(s);
-    if (!state)
-        return NULL;
+    if (!state) {
+        acb->common.cb(acb->common.opaque, -EIO);
+        qemu_aio_release(acb);
+        return;
+    }
 
     acb->start = 0;
-    acb->end = (nb_sectors * SECTOR_SIZE);
+    acb->end = (acb->nb_sectors * SECTOR_SIZE);
 
     state->buf_off = 0;
     if (state->orig_buf)
@@ -489,12 +493,38 @@ static BlockDriverAIOCB *curl_aio_readv(BlockDriverState *bs,
 
     snprintf(state->range, 127, "%zd-%zd", start, end);
     DPRINTF("CURL (AIO): Reading %d at %zd (%s)\n",
-            (nb_sectors * SECTOR_SIZE), start, state->range);
+            (acb->nb_sectors * SECTOR_SIZE), start, state->range);
     curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range);
 
     curl_multi_add_handle(s->multi, state->curl);
     curl_multi_do(s);
 
+}
+
+static BlockDriverAIOCB *curl_aio_readv(BlockDriverState *bs,
+        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+        BlockDriverCompletionFunc *cb, void *opaque)
+{
+    CURLAIOCB *acb;
+
+    acb = qemu_aio_get(&curl_aio_pool, bs, cb, opaque);
+
+    if (!acb) {
+        return NULL;
+    }
+
+    acb->qiov = qiov;
+    acb->sector_num = sector_num;
+    acb->nb_sectors = nb_sectors;
+
+    acb->bh = qemu_bh_new(curl_readv_bh_cb, acb);
+
+    if (!acb->bh) {
+        DPRINTF("CURL: qemu_bh_new failed\n");
+        return NULL;
+    }
+
+    qemu_bh_schedule(acb->bh);
     return &acb->common;
 }
 
-- 
1.7.6.2

Re: [Qemu-devel] [PULL 0/4] Block patches (includes build fix for non-Linux)

[Anthony Liguori]

On 09/21/2011 08:21 AM, Kevin Wolf wrote:
> The following changes since commit 27cdad67a1bc23b38c765b677ed8064bfb8d3e44:
>
>    Revert "alpha-softmmu: Disable for the 0.15 release branch." (2011-09-21 00:50:32 +0200)

Pulled.  Thanks.

Regards,

Anthony Liguori

>
> are available in the git repository at:
>    git://repo.or.cz/qemu/kevin.git for-anthony
>
> Daniel Verkamp (1):
>        ahci: add port I/O index-data pair
>
> Nick Thomas (2):
>        block/curl: Implement a flush function on the fd handlers
>        block/curl: Don't finish AIOCBs too early
>
> Paolo Bonzini (1):
>        nbd: fix non-Linux build failure
>
>   block/curl.c  |   94 +++++++++++++++++++++++++++++++++++++++++++--------------
>   hw/ide/ahci.c |   42 +++++++++++++++++++++++++-
>   hw/ide/ahci.h |    9 +++++-
>   hw/ide/ich.c  |   27 ++++++++++++++++-
>   hw/pci_regs.h |    1 +
>   nbd.c         |    2 +-
>   6 files changed, 148 insertions(+), 27 deletions(-)
>
>