tests/qtest/ide-test: Verify READ NATIVE MAX ADDRESS is not limited

Verify that the ATA command READ NATIVE MAX ADDRESS returns the last
valid CHS tuple for the native device rather than any limit
established by INITIALIZE DEVICE PARAMETERS.

Signed-off-by: Lev Kujawski <lkujaw@mailbox.org>
Message-ID: <20221010085229.2431276-2-lkujaw@mailbox.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/ide-test.c

@@ -34,7 +34,8 @@
 #include "hw/pci/pci_ids.h"
 #include "hw/pci/pci_regs.h"
 
-#define TEST_IMAGE_SIZE 64 * 1024 * 1024
+/* Specified by ATA (physical) CHS geometry for ~64 MiB device.  */
+#define TEST_IMAGE_SIZE ((130 * 16 * 63) * 512)
 
 #define IDE_PCI_DEV     1
 #define IDE_PCI_FUNC    1
@@ -88,11 +89,13 @@ enum {
 enum {
     CMD_DSM         = 0x06,
     CMD_DIAGNOSE    = 0x90,
+    CMD_INIT_DP     = 0x91,  /* INITIALIZE DEVICE PARAMETERS */
     CMD_READ_DMA    = 0xc8,
     CMD_WRITE_DMA   = 0xca,
     CMD_FLUSH_CACHE = 0xe7,
     CMD_IDENTIFY    = 0xec,
     CMD_PACKET      = 0xa0,
+    CMD_READ_NATIVE = 0xf8,  /* READ NATIVE MAX ADDRESS */
 
     CMDF_ABORT      = 0x100,
     CMDF_NO_BM      = 0x200,
@@ -560,6 +563,46 @@ static void string_cpu_to_be16(uint16_t *s, size_t bytes)
     }
 }
 
+static void test_specify(void)
+{
+    QTestState *qts;
+    QPCIDevice *dev;
+    QPCIBar bmdma_bar, ide_bar;
+    uint16_t cyls;
+    uint8_t heads, spt;
+
+    qts = ide_test_start(
+        "-blockdev driver=file,node-name=hda,filename=%s "
+        "-device ide-hd,drive=hda,bus=ide.0,unit=0 ",
+        tmp_path[0]);
+
+    dev = get_pci_device(qts, &bmdma_bar, &ide_bar);
+
+    /* Initialize drive with zero sectors per track and one head.  */
+    qpci_io_writeb(dev, ide_bar, reg_nsectors, 0);
+    qpci_io_writeb(dev, ide_bar, reg_device, 0);
+    qpci_io_writeb(dev, ide_bar, reg_command, CMD_INIT_DP);
+
+    /* READ NATIVE MAX ADDRESS (CHS mode).  */
+    qpci_io_writeb(dev, ide_bar, reg_device, 0xa0);
+    qpci_io_writeb(dev, ide_bar, reg_command, CMD_READ_NATIVE);
+
+    heads = qpci_io_readb(dev, ide_bar, reg_device) & 0xf;
+    ++heads;
+    g_assert_cmpint(heads, ==, 16);
+
+    cyls = qpci_io_readb(dev, ide_bar, reg_lba_high) << 8;
+    cyls |= qpci_io_readb(dev, ide_bar, reg_lba_middle);
+    ++cyls;
+    g_assert_cmpint(cyls, ==, 130);
+
+    spt = qpci_io_readb(dev, ide_bar, reg_lba_low);
+    g_assert_cmpint(spt, ==, 63);
+
+    ide_test_quit(qts);
+    free_pci_device(dev);
+}
+
 static void test_identify(void)
 {
     QTestState *qts;
@@ -1077,6 +1120,8 @@ int main(int argc, char **argv)
     /* Run the tests */
     g_test_init(&argc, &argv, NULL);
 
+    qtest_add_func("/ide/read_native", test_specify);
+
     qtest_add_func("/ide/identify", test_identify);
 
     qtest_add_func("/ide/diagnostic", test_diagnostic);