From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40907) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZKX18-00060R-EK for qemu-devel@nongnu.org; Wed, 29 Jul 2015 15:27:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZKX17-0000v1-9d for qemu-devel@nongnu.org; Wed, 29 Jul 2015 15:27:54 -0400 Received: from hall.aurel32.net ([2001:bc8:30d7:100::1]:60065) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZKX17-0000ud-4T for qemu-devel@nongnu.org; Wed, 29 Jul 2015 15:27:53 -0400 From: Aurelien Jarno Date: Wed, 29 Jul 2015 21:27:48 +0200 Message-Id: <1438198068-32428-1-git-send-email-aurelien@aurel32.net> Subject: [Qemu-devel] [PATCH for-2.4] macio: re-add TRIM support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: John Snow , Mark Cave-Ayland , Aurelien Jarno Commit bd4214fc dropped TRIM support by mistake. Given it is still advertised to the host when using a drive with discard=on, this cause the IDE bus to hang when the host issues a TRIM command. This patch fixes that by re-adding the TRIM code, ported to the new new DMA implementation. Cc: Mark Cave-Ayland Cc: John Snow Signed-off-by: Aurelien Jarno --- hw/ide/macio.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/hw/ide/macio.c b/hw/ide/macio.c index a55a479..66ac2ba 100644 --- a/hw/ide/macio.c +++ b/hw/ide/macio.c @@ -208,6 +208,33 @@ static void pmac_dma_write(BlockBackend *blk, cb, io); } +static void pmac_dma_trim(BlockBackend *blk, + int64_t offset, int bytes, + void (*cb)(void *opaque, int ret), void *opaque) +{ + DBDMA_io *io = opaque; + MACIOIDEState *m = io->opaque; + IDEState *s = idebus_active_if(&m->bus); + dma_addr_t dma_addr, dma_len; + void *mem; + + qemu_iovec_destroy(&io->iov); + qemu_iovec_init(&io->iov, io->len / MACIO_PAGE_SIZE + 1); + + dma_addr = io->addr; + dma_len = io->len; + mem = dma_memory_map(&address_space_memory, dma_addr, &dma_len, + DMA_DIRECTION_TO_DEVICE); + + qemu_iovec_add(&io->iov, mem, io->len); + s->io_buffer_size -= io->len; + s->io_buffer_index += io->len; + io->len = 0; + + m->aiocb = ide_issue_trim(blk, (offset >> 9), &io->iov, (bytes >> 9), + cb, io); +} + static void pmac_ide_atapi_transfer_cb(void *opaque, int ret) { DBDMA_io *io = opaque; @@ -313,6 +340,7 @@ static void pmac_ide_transfer_cb(void *opaque, int ret) pmac_dma_write(s->blk, offset, io->len, pmac_ide_transfer_cb, io); break; case IDE_DMA_TRIM: + pmac_dma_trim(s->blk, offset, io->len, pmac_ide_transfer_cb, io); break; } -- 2.1.4