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ide-test: add cdrom dma test 

Now, test the DMA functionality of the ATAPI drive.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1441926555-19471-5-git-send-email-jsnow@redhat.com
This commit is contained in:
John Snow 2015-09-17 14:17:05 -04:00
parent f7ba8d7fb6
commit 00ea63fd18
1 changed files with 72 additions and 18 deletions
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90
tests/ide-test.c
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@ -53,6 +53,7 @@
enum { enum {
reg_data = 0x0, reg_data = 0x0,
reg_feature = 0x1,
reg_nsectors = 0x2, reg_nsectors = 0x2,
reg_lba_low = 0x3, reg_lba_low = 0x3,
reg_lba_middle = 0x4, reg_lba_middle = 0x4,
@ -179,7 +180,8 @@ typedef struct PrdtEntry {
#define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0) #define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
static int send_dma_request(int cmd, uint64_t sector, int nb_sectors, static int send_dma_request(int cmd, uint64_t sector, int nb_sectors,
PrdtEntry *prdt, int prdt_entries) PrdtEntry *prdt, int prdt_entries,
void(*post_exec)(uint64_t sector, int nb_sectors))
{ {
QPCIDevice *dev; QPCIDevice *dev;
uint16_t bmdma_base; uint16_t bmdma_base;
@ -196,6 +198,9 @@ static int send_dma_request(int cmd, uint64_t sector, int nb_sectors,
switch (cmd) { switch (cmd) {
case CMD_READ_DMA: case CMD_READ_DMA:
case CMD_PACKET:
/* Assuming we only test data reads w/ ATAPI, otherwise we need to know
* the SCSI command being sent in the packet, too. */
from_dev = true; from_dev = true;
break; break;
case CMD_WRITE_DMA: case CMD_WRITE_DMA:
@ -224,14 +229,22 @@ static int send_dma_request(int cmd, uint64_t sector, int nb_sectors,
outl(bmdma_base + bmreg_prdt, guest_prdt); outl(bmdma_base + bmreg_prdt, guest_prdt);
/* ATA DMA command */ /* ATA DMA command */
outb(IDE_BASE + reg_nsectors, nb_sectors); if (cmd == CMD_PACKET) {
/* Enables ATAPI DMA; otherwise PIO is attempted */
outb(IDE_BASE + reg_lba_low, sector & 0xff); outb(IDE_BASE + reg_feature, 0x01);
outb(IDE_BASE + reg_lba_middle, (sector >> 8) & 0xff); } else {
outb(IDE_BASE + reg_lba_high, (sector >> 16) & 0xff); outb(IDE_BASE + reg_nsectors, nb_sectors);
outb(IDE_BASE + reg_lba_low, sector & 0xff);
outb(IDE_BASE + reg_lba_middle, (sector >> 8) & 0xff);
outb(IDE_BASE + reg_lba_high, (sector >> 16) & 0xff);
}
outb(IDE_BASE + reg_command, cmd); outb(IDE_BASE + reg_command, cmd);
if (post_exec) {
post_exec(sector, nb_sectors);
}
/* Start DMA transfer */ /* Start DMA transfer */
outb(bmdma_base + bmreg_cmd, BM_CMD_START | (from_dev ? BM_CMD_WRITE : 0)); outb(bmdma_base + bmreg_cmd, BM_CMD_START | (from_dev ? BM_CMD_WRITE : 0));
@ -285,7 +298,8 @@ static void test_bmdma_simple_rw(void)
memset(buf, 0x55, len); memset(buf, 0x55, len);
memwrite(guest_buf, buf, len); memwrite(guest_buf, buf, len);
status = send_dma_request(CMD_WRITE_DMA, 0, 1, prdt, ARRAY_SIZE(prdt)); status = send_dma_request(CMD_WRITE_DMA, 0, 1, prdt,
ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR); g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
@ -293,14 +307,15 @@ static void test_bmdma_simple_rw(void)
memset(buf, 0xaa, len); memset(buf, 0xaa, len);
memwrite(guest_buf, buf, len); memwrite(guest_buf, buf, len);
status = send_dma_request(CMD_WRITE_DMA, 1, 1, prdt, ARRAY_SIZE(prdt)); status = send_dma_request(CMD_WRITE_DMA, 1, 1, prdt,
ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR); g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Read and verify 0x55 pattern in sector 0 */ /* Read and verify 0x55 pattern in sector 0 */
memset(cmpbuf, 0x55, len); memset(cmpbuf, 0x55, len);
status = send_dma_request(CMD_READ_DMA, 0, 1, prdt, ARRAY_SIZE(prdt)); status = send_dma_request(CMD_READ_DMA, 0, 1, prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR); g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
@ -310,7 +325,7 @@ static void test_bmdma_simple_rw(void)
/* Read and verify 0xaa pattern in sector 1 */ /* Read and verify 0xaa pattern in sector 1 */
memset(cmpbuf, 0xaa, len); memset(cmpbuf, 0xaa, len);
status = send_dma_request(CMD_READ_DMA, 1, 1, prdt, ARRAY_SIZE(prdt)); status = send_dma_request(CMD_READ_DMA, 1, 1, prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR); g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
@ -335,13 +350,13 @@ static void test_bmdma_short_prdt(void)
/* Normal request */ /* Normal request */
status = send_dma_request(CMD_READ_DMA, 0, 1, status = send_dma_request(CMD_READ_DMA, 0, 1,
prdt, ARRAY_SIZE(prdt)); prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, 0); g_assert_cmphex(status, ==, 0);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Abort the request before it completes */ /* Abort the request before it completes */
status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1, status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1,
prdt, ARRAY_SIZE(prdt)); prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, 0); g_assert_cmphex(status, ==, 0);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
} }
@ -360,13 +375,13 @@ static void test_bmdma_one_sector_short_prdt(void)
/* Normal request */ /* Normal request */
status = send_dma_request(CMD_READ_DMA, 0, 2, status = send_dma_request(CMD_READ_DMA, 0, 2,
prdt, ARRAY_SIZE(prdt)); prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, 0); g_assert_cmphex(status, ==, 0);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Abort the request before it completes */ /* Abort the request before it completes */
status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 2, status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 2,
prdt, ARRAY_SIZE(prdt)); prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, 0); g_assert_cmphex(status, ==, 0);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
} }
@ -384,13 +399,13 @@ static void test_bmdma_long_prdt(void)
/* Normal request */ /* Normal request */
status = send_dma_request(CMD_READ_DMA, 0, 1, status = send_dma_request(CMD_READ_DMA, 0, 1,
prdt, ARRAY_SIZE(prdt)); prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_ACTIVE | BM_STS_INTR); g_assert_cmphex(status, ==, BM_STS_ACTIVE | BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
/* Abort the request before it completes */ /* Abort the request before it completes */
status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1, status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1,
prdt, ARRAY_SIZE(prdt)); prdt, ARRAY_SIZE(prdt), NULL);
g_assert_cmphex(status, ==, BM_STS_INTR); g_assert_cmphex(status, ==, BM_STS_INTR);
assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR); assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
} }
@ -406,7 +421,7 @@ static void test_bmdma_no_busmaster(void)
PrdtEntry prdt[4096] = { }; PrdtEntry prdt[4096] = { };
status = send_dma_request(CMD_READ_DMA | CMDF_NO_BM, 0, 512, status = send_dma_request(CMD_READ_DMA | CMDF_NO_BM, 0, 512,
prdt, ARRAY_SIZE(prdt)); prdt, ARRAY_SIZE(prdt), NULL);
/* Not entirely clear what the expected result is, but this is what we get /* Not entirely clear what the expected result is, but this is what we get
* in practice. At least we want to be aware of any changes. */ * in practice. At least we want to be aware of any changes. */
@ -602,11 +617,15 @@ typedef struct Read10CDB {
uint16_t padding; uint16_t padding;
} __attribute__((__packed__)) Read10CDB; } __attribute__((__packed__)) Read10CDB;
static void send_scsi_cdb_read10(uint32_t lba, uint16_t nblocks) static void send_scsi_cdb_read10(uint64_t lba, int nblocks)
{ {
Read10CDB pkt = { .padding = 0 }; Read10CDB pkt = { .padding = 0 };
int i; int i;
g_assert_cmpint(lba, <=, UINT32_MAX);
g_assert_cmpint(nblocks, <=, UINT16_MAX);
g_assert_cmpint(nblocks, >=, 0);
/* Construct SCSI CDB packet */ /* Construct SCSI CDB packet */
pkt.opcode = 0x28; pkt.opcode = 0x28;
pkt.lba = cpu_to_be32(lba); pkt.lba = cpu_to_be32(lba);
@ -739,6 +758,40 @@ static void test_cdrom_pio_large(void)
cdrom_pio_impl(BYTE_COUNT_LIMIT * 4 / ATAPI_BLOCK_SIZE); cdrom_pio_impl(BYTE_COUNT_LIMIT * 4 / ATAPI_BLOCK_SIZE);
} }
static void test_cdrom_dma(void)
{
static const size_t len = ATAPI_BLOCK_SIZE;
char *pattern = g_malloc(ATAPI_BLOCK_SIZE * 16);
char *rx = g_malloc0(len);
uintptr_t guest_buf;
PrdtEntry prdt[1];
FILE *fh;
ide_test_start("-drive if=none,file=%s,media=cdrom,format=raw,id=sr0,index=0 "
"-device ide-cd,drive=sr0,bus=ide.0", tmp_path);
qtest_irq_intercept_in(global_qtest, "ioapic");
guest_buf = guest_alloc(guest_malloc, len);
prdt[0].addr = cpu_to_le32(guest_buf);
prdt[0].size = cpu_to_le32(len | PRDT_EOT);
generate_pattern(pattern, ATAPI_BLOCK_SIZE * 16, ATAPI_BLOCK_SIZE);
fh = fopen(tmp_path, "w+");
fwrite(pattern, ATAPI_BLOCK_SIZE, 16, fh);
fclose(fh);
send_dma_request(CMD_PACKET, 0, 1, prdt, 1, send_scsi_cdb_read10);
/* Read back data from guest memory into local qtest memory */
memread(guest_buf, rx, len);
g_assert_cmpint(memcmp(pattern, rx, len), ==, 0);
g_free(pattern);
g_free(rx);
test_bmdma_teardown();
}
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
const char *arch = qtest_get_arch(); const char *arch = qtest_get_arch();
@ -784,6 +837,7 @@ int main(int argc, char **argv)
qtest_add_func("/ide/cdrom/pio", test_cdrom_pio); qtest_add_func("/ide/cdrom/pio", test_cdrom_pio);
qtest_add_func("/ide/cdrom/pio_large", test_cdrom_pio_large); qtest_add_func("/ide/cdrom/pio_large", test_cdrom_pio_large);
qtest_add_func("/ide/cdrom/dma", test_cdrom_dma);
ret = g_test_run(); ret = g_test_run();