[Qemu-devel] [PATCH v2 14/15] qtest/ahci: Bookmark FB and CLB pointers

[John Snow <jsnow@redhat.com>]

Instead of re-querying the AHCI device for the FB and CLB buffers, save
the pointer we gave to the device during initialization and reference
these values instead.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
---
 tests/ahci-test.c   | 42 ++++++++++++++++++++----------------------
 tests/libqos/ahci.h |  6 ++++++
 2 files changed, 26 insertions(+), 22 deletions(-)

diff --git a/tests/ahci-test.c b/tests/ahci-test.c
index aa1f66f..b527e13 100644
--- a/tests/ahci-test.c
+++ b/tests/ahci-test.c
@@ -206,7 +206,7 @@ static void ahci_hba_enable(AHCIQState *ahci)
      * PxCMD.FR   "FIS Receive Running"
      * PxCMD.CR   "Command List Running"
      */
-    uint32_t reg, ports_impl, clb, fb;
+    uint32_t reg, ports_impl;
     uint16_t i;
     uint8_t num_cmd_slots;
 
@@ -255,16 +255,20 @@ static void ahci_hba_enable(AHCIQState *ahci)
 
         /* Allocate Memory for the Command List Buffer & FIS Buffer */
         /* PxCLB space ... 0x20 per command, as in 4.2.2 p 36 */
-        clb = ahci_alloc(ahci, num_cmd_slots * 0x20);
-        g_test_message("CLB: 0x%08x", clb);
-        ahci_px_wreg(ahci, i, AHCI_PX_CLB, clb);
-        g_assert_cmphex(clb, ==, ahci_px_rreg(ahci, i, AHCI_PX_CLB));
+        ahci->port[i].clb = ahci_alloc(ahci, num_cmd_slots * 0x20);
+        qmemset(ahci->port[i].clb, 0x00, 0x100);
+        g_test_message("CLB: 0x%08lx", ahci->port[i].clb);
+        ahci_px_wreg(ahci, i, AHCI_PX_CLB, ahci->port[i].clb);
+        g_assert_cmphex(ahci->port[i].clb, ==,
+                        ahci_px_rreg(ahci, i, AHCI_PX_CLB));
 
         /* PxFB space ... 0x100, as in 4.2.1 p 35 */
-        fb = ahci_alloc(ahci, 0x100);
-        g_test_message("FB: 0x%08x", fb);
-        ahci_px_wreg(ahci, i, AHCI_PX_FB, fb);
-        g_assert_cmphex(fb, ==, ahci_px_rreg(ahci, i, AHCI_PX_FB));
+        ahci->port[i].fb = ahci_alloc(ahci, 0x100);
+        qmemset(ahci->port[i].fb, 0x00, 0x100);
+        g_test_message("FB: 0x%08lx", ahci->port[i].fb);
+        ahci_px_wreg(ahci, i, AHCI_PX_FB, ahci->port[i].fb);
+        g_assert_cmphex(ahci->port[i].fb, ==,
+                        ahci_px_rreg(ahci, i, AHCI_PX_FB));
 
         /* Clear PxSERR, PxIS, then IS.IPS[x] by writing '1's. */
         ahci_px_wreg(ahci, i, AHCI_PX_SERR, 0xFFFFFFFF);
@@ -883,7 +887,7 @@ static void ahci_test_identify(AHCIQState *ahci)
     RegH2DFIS fis;
     AHCICommand cmd;
     PRD prd;
-    uint32_t ports, reg, clb, table, fb, data_ptr;
+    uint32_t ports, reg, table, data_ptr;
     uint16_t buff[256];
     unsigned i;
     int rc;
@@ -929,9 +933,7 @@ static void ahci_test_identify(AHCIQState *ahci)
     g_assert_cmphex(ahci_px_rreg(ahci, i, AHCI_PX_IS), ==, 0);
 
     /* Wipe the FIS-Receive Buffer */
-    fb = ahci_px_rreg(ahci, i, AHCI_PX_FB);
-    g_assert_cmphex(fb, !=, 0);
-    qmemset(fb, 0x00, 0x100);
+    qmemset(ahci->port[i].fb, 0x00, 0x100);
 
     /* Create a Command Table buffer. 0x80 is the smallest with a PRDTL of 0. */
     /* We need at least one PRD, so round up to the nearest 0x80 multiple.    */
@@ -943,13 +945,9 @@ static void ahci_test_identify(AHCIQState *ahci)
     data_ptr = ahci_alloc(ahci, 512);
     g_assert(data_ptr);
 
-    /* Grab the Command List Buffer pointer */
-    clb = ahci_px_rreg(ahci, i, AHCI_PX_CLB);
-    g_assert(clb);
-
     /* Copy the existing Command #0 structure from the CLB into local memory,
      * and build a new command #0. */
-    memread(clb, &cmd, sizeof(cmd));
+    memread(ahci->port[i].clb, &cmd, sizeof(cmd));
     cmd.b1 = 5;    /* reg_h2d_fis is 5 double-words long */
     cmd.b2 = 0x04; /* clear PxTFD.STS.BSY when done */
     cmd.prdtl = cpu_to_le16(1); /* One PRD table entry. */
@@ -981,7 +979,7 @@ static void ahci_test_identify(AHCIQState *ahci)
     memwrite(table + 0x80, &prd, sizeof(prd));
 
     /* Commit Command #0, pointing to the Table, to the Command List Buffer. */
-    memwrite(clb, &cmd, sizeof(cmd));
+    memwrite(ahci->port[i].clb, &cmd, sizeof(cmd));
 
     /* Everything is in place, but we haven't given the go-ahead yet. */
     g_assert_cmphex(ahci_px_rreg(ahci, i, AHCI_PX_IS), ==, 0);
@@ -1012,12 +1010,12 @@ static void ahci_test_identify(AHCIQState *ahci)
     ASSERT_BIT_CLEAR(reg, AHCI_PX_TFD_ERR);
 
     /* Investigate CMD #0, assert that we read 512 bytes */
-    memread(clb, &cmd, sizeof(cmd));
+    memread(ahci->port[i].clb, &cmd, sizeof(cmd));
     g_assert_cmphex(512, ==, le32_to_cpu(cmd.prdbc));
 
     /* Investigate FIS responses */
-    memread(fb + 0x20, pio, 0x20);
-    memread(fb + 0x40, d2h, 0x20);
+    memread(ahci->port[i].fb + 0x20, pio, 0x20);
+    memread(ahci->port[i].fb + 0x40, d2h, 0x20);
     g_assert_cmphex(pio->fis_type, ==, 0x5f);
     g_assert_cmphex(d2h->fis_type, ==, 0x34);
     g_assert_cmphex(pio->flags, ==, d2h->flags);
diff --git a/tests/libqos/ahci.h b/tests/libqos/ahci.h
index 645f05b..72c39bc 100644
--- a/tests/libqos/ahci.h
+++ b/tests/libqos/ahci.h
@@ -245,6 +245,11 @@
 
 /*** Structures ***/
 
+typedef struct AHCIPortQState {
+    uint64_t fb;
+    uint64_t clb;
+} AHCIPortQState;
+
 typedef struct AHCIQState {
     QOSState *parent;
     QPCIDevice *dev;
@@ -253,6 +258,7 @@ typedef struct AHCIQState {
     uint32_t fingerprint;
     uint32_t cap;
     uint32_t cap2;
+    AHCIPortQState port[32];
 } AHCIQState;
 
 /**
-- 
1.9.3