[Qemu-devel] [PATCH v2] ide-test: test trim requests

[Anton Nefedov]

Signed-off-by: Anton Nefedov <address@hidden>
---
 tests/ide-test.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/tests/ide-test.c b/tests/ide-test.c
index aa9de06..be427e4 100644
--- a/tests/ide-test.c
+++ b/tests/ide-test.c
@@ -52,6 +52,7 @@
 enum {
     reg_data        = 0x0,
     reg_feature     = 0x1,
+    reg_error       = 0x1,
     reg_nsectors    = 0x2,
     reg_lba_low     = 0x3,
     reg_lba_middle  = 0x4,
@@ -69,6 +70,11 @@ enum {
     ERR     = 0x01,
 };
 
+/* Error field */
+enum {
+    ABRT    = 0x04,
+};
+
 enum {
     DEV     = 0x10,
     LBA     = 0x40,
@@ -81,6 +87,7 @@ enum {
 };
 
 enum {
+    CMD_DSM         = 0x06,
     CMD_READ_DMA    = 0xc8,
     CMD_WRITE_DMA   = 0xca,
     CMD_FLUSH_CACHE = 0xe7,
@@ -179,6 +186,12 @@ typedef struct PrdtEntry {
 #define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
 #define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
 
+static uint64_t trim_range_le(uint64_t sector, uint16_t count)
+{
+    /* 2-byte range, 6-byte LBA */
+    return cpu_to_le64(((uint64_t)count << 48) + sector);
+}
+
 static int send_dma_request(int cmd, uint64_t sector, int nb_sectors,
                             PrdtEntry *prdt, int prdt_entries,
                             void(*post_exec)(QPCIDevice *dev, QPCIBar ide_bar,
@@ -204,6 +217,7 @@ static int send_dma_request(int cmd, uint64_t sector, int 
nb_sectors,
          * the SCSI command being sent in the packet, too. */
         from_dev = true;
         break;
+    case CMD_DSM:
     case CMD_WRITE_DMA:
         from_dev = false;
         break;
@@ -234,6 +248,10 @@ static int send_dma_request(int cmd, uint64_t sector, int 
nb_sectors,
         /* Enables ATAPI DMA; otherwise PIO is attempted */
         qpci_io_writeb(dev, ide_bar, reg_feature, 0x01);
     } else {
+        if (cmd == CMD_DSM) {
+            /* trim bit */
+            qpci_io_writeb(dev, ide_bar, reg_feature, 0x01);
+        }
         qpci_io_writeb(dev, ide_bar, reg_nsectors, nb_sectors);
         qpci_io_writeb(dev, ide_bar, reg_lba_low,    sector & 0xff);
         qpci_io_writeb(dev, ide_bar, reg_lba_middle, (sector >> 8) & 0xff);
@@ -344,6 +362,58 @@ static void test_bmdma_simple_rw(void)
     g_free(cmpbuf);
 }
 
+static void test_bmdma_trim(void)
+{
+    QPCIDevice *dev;
+    QPCIBar bmdma_bar, ide_bar;
+    uint8_t status;
+    const uint64_t trim_range[] = { trim_range_le(0, 2),
+                                    trim_range_le(6, 8),
+                                    trim_range_le(10, 1),
+                                  };
+    const uint64_t bad_range = trim_range_le(TEST_IMAGE_SIZE / 512 - 1, 2);
+    size_t len = 512;
+    uint8_t *buf;
+    uintptr_t guest_buf = guest_alloc(guest_malloc, len);
+
+    PrdtEntry prdt[] = {
+        {
+            .addr = cpu_to_le32(guest_buf),
+            .size = cpu_to_le32(len | PRDT_EOT),
+        },
+    };
+
+    dev = get_pci_device(&bmdma_bar, &ide_bar);
+
+    buf = g_malloc(len);
+
+    /* Normal request */
+    *((uint64_t *)buf) = trim_range[0];
+    *((uint64_t *)buf + 1) = trim_range[1];
+
+    memwrite(guest_buf, buf, 2 * sizeof(uint64_t));
+
+    status = send_dma_request(CMD_DSM, 0, 1, prdt,
+                              ARRAY_SIZE(prdt), NULL);
+    g_assert_cmphex(status, ==, BM_STS_INTR);
+    assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), DF | ERR);
+
+    /* Request contains invalid range */
+    *((uint64_t *)buf) = trim_range[2];
+    *((uint64_t *)buf + 1) = bad_range;
+
+    memwrite(guest_buf, buf, 2 * sizeof(uint64_t));
+
+    status = send_dma_request(CMD_DSM, 0, 1, prdt,
+                              ARRAY_SIZE(prdt), NULL);
+    g_assert_cmphex(status, ==, BM_STS_INTR);
+    assert_bit_set(qpci_io_readb(dev, ide_bar, reg_status), ERR);
+    assert_bit_set(qpci_io_readb(dev, ide_bar, reg_error), ABRT);
+
+    free_pci_device(dev);
+    g_free(buf);
+}
+
 static void test_bmdma_short_prdt(void)
 {
     QPCIDevice *dev;
@@ -963,6 +1033,7 @@ int main(int argc, char **argv)
 
     qtest_add_func("/ide/bmdma/setup", test_bmdma_setup);
     qtest_add_func("/ide/bmdma/simple_rw", test_bmdma_simple_rw);
+    qtest_add_func("/ide/bmdma/trim", test_bmdma_trim);
     qtest_add_func("/ide/bmdma/short_prdt", test_bmdma_short_prdt);
     qtest_add_func("/ide/bmdma/one_sector_short_prdt",
                    test_bmdma_one_sector_short_prdt);
-- 
2.7.4